tor-browser

formatutils.cpp (189596B)

---

//
// Copyright 2013 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//

// formatutils.cpp: Queries for GL image formats.

#include "libANGLE/formatutils.h"

#include "anglebase/no_destructor.h"
#include "common/mathutil.h"
#include "gpu_info_util/SystemInfo.h"
#include "libANGLE/Context.h"
#include "libANGLE/Framebuffer.h"

using namespace angle;

namespace gl
{

// ES2 requires that format is equal to internal format at all glTex*Image2D entry points and the
// implementation can decide the true, sized, internal format. The ES2FormatMap determines the
// internal format for all valid format and type combinations.
GLenum GetSizedFormatInternal(GLenum format, GLenum type);

namespace
{
bool CheckedMathResult(const CheckedNumeric<GLuint> &value, GLuint *resultOut)
{
   if (!value.IsValid())
   {
       return false;
   }
   else
   {
       *resultOut = value.ValueOrDie();
       return true;
   }
}

constexpr uint32_t PackTypeInfo(GLuint bytes, bool specialized)
{
   // static_assert within constexpr requires c++17
   // static_assert(isPow2(bytes));
   return bytes | (rx::Log2(bytes) << 8) | (specialized << 16);
}

}  // anonymous namespace

FormatType::FormatType() : format(GL_NONE), type(GL_NONE) {}

FormatType::FormatType(GLenum format_, GLenum type_) : format(format_), type(type_) {}

bool FormatType::operator<(const FormatType &other) const
{
   if (format != other.format)
       return format < other.format;
   return type < other.type;
}

bool operator<(const Type &a, const Type &b)
{
   return memcmp(&a, &b, sizeof(Type)) < 0;
}

// Information about internal formats
static bool AlwaysSupported(const Version &, const Extensions &)
{
   return true;
}

static bool NeverSupported(const Version &, const Extensions &)
{
   return false;
}

static bool RequireES1(const Version &clientVersion, const Extensions &extensions)
{
   return clientVersion.major == 1;
}

template <GLuint minCoreGLMajorVersion, GLuint minCoreGLMinorVersion>
static bool RequireES(const Version &clientVersion, const Extensions &)
{
   return clientVersion >= Version(minCoreGLMajorVersion, minCoreGLMinorVersion);
}

// Check support for a single extension
template <ExtensionBool bool1>
static bool RequireExt(const Version &, const Extensions &extensions)
{
   return extensions.*bool1;
}

// Check for a minimum client version or a single extension
template <GLuint minCoreGLMajorVersion, GLuint minCoreGLMinorVersion, ExtensionBool bool1>
static bool RequireESOrExt(const Version &clientVersion, const Extensions &extensions)
{
   return clientVersion >= Version(minCoreGLMajorVersion, minCoreGLMinorVersion) ||
          extensions.*bool1;
}

// Check for a minimum client version or two extensions
template <GLuint minCoreGLMajorVersion,
         GLuint minCoreGLMinorVersion,
         ExtensionBool bool1,
         ExtensionBool bool2>
static bool RequireESOrExtAndExt(const Version &clientVersion, const Extensions &extensions)
{
   return clientVersion >= Version(minCoreGLMajorVersion, minCoreGLMinorVersion) ||
          (extensions.*bool1 && extensions.*bool2);
}

// Check for a minimum client version or at least one of two extensions
template <GLuint minCoreGLMajorVersion,
         GLuint minCoreGLMinorVersion,
         ExtensionBool bool1,
         ExtensionBool bool2>
static bool RequireESOrExtOrExt(const Version &clientVersion, const Extensions &extensions)
{
   return clientVersion >= Version(minCoreGLMajorVersion, minCoreGLMinorVersion) ||
          extensions.*bool1 || extensions.*bool2;
}

// Check support for two extensions
template <ExtensionBool bool1, ExtensionBool bool2>
static bool RequireExtAndExt(const Version &, const Extensions &extensions)
{
   return extensions.*bool1 && extensions.*bool2;
}

// Check support for either of two extensions
template <ExtensionBool bool1, ExtensionBool bool2>
static bool RequireExtOrExt(const Version &, const Extensions &extensions)
{
   return extensions.*bool1 || extensions.*bool2;
}

// Check support for any of three extensions
template <ExtensionBool bool1, ExtensionBool bool2, ExtensionBool bool3>
static bool RequireExtOrExtOrExt(const Version &, const Extensions &extensions)
{
   return extensions.*bool1 || extensions.*bool2 || extensions.*bool3;
}

// R8, RG8
static bool SizedRGSupport(const Version &clientVersion, const Extensions &extensions)
{
   return clientVersion >= Version(3, 0) ||
          (extensions.textureStorageEXT && extensions.textureRgEXT);
}

// R16F, RG16F with HALF_FLOAT_OES type
static bool SizedHalfFloatOESRGSupport(const Version &clientVersion, const Extensions &extensions)
{
   return extensions.textureStorageEXT && extensions.textureHalfFloatOES &&
          extensions.textureRgEXT;
}

static bool SizedHalfFloatOESRGTextureAttachmentSupport(const Version &clientVersion,
                                                       const Extensions &extensions)
{
   return SizedHalfFloatOESRGSupport(clientVersion, extensions) &&
          extensions.colorBufferHalfFloatEXT;
}

// R16F, RG16F with either HALF_FLOAT_OES or HALF_FLOAT types
static bool SizedHalfFloatRGSupport(const Version &clientVersion, const Extensions &extensions)
{
   // HALF_FLOAT
   if (clientVersion >= Version(3, 0))
   {
       return true;
   }
   // HALF_FLOAT_OES
   else
   {
       return SizedHalfFloatOESRGSupport(clientVersion, extensions);
   }
}

static bool SizedHalfFloatRGTextureAttachmentSupport(const Version &clientVersion,
                                                    const Extensions &extensions)
{
   // HALF_FLOAT
   if (clientVersion >= Version(3, 0))
   {
       // WebGL 2 supports EXT_color_buffer_half_float.
       return extensions.colorBufferFloatEXT ||
              (extensions.webglCompatibilityANGLE && extensions.colorBufferHalfFloatEXT);
   }
   // HALF_FLOAT_OES
   else
   {
       return SizedHalfFloatOESRGTextureAttachmentSupport(clientVersion, extensions);
   }
}

static bool SizedHalfFloatRGRenderbufferSupport(const Version &clientVersion,
                                               const Extensions &extensions)
{
   return (clientVersion >= Version(3, 0) ||
           (extensions.textureHalfFloatOES && extensions.textureRgEXT)) &&
          (extensions.colorBufferFloatEXT || extensions.colorBufferHalfFloatEXT);
}

// RGB16F, RGBA16F with HALF_FLOAT_OES type
static bool SizedHalfFloatOESSupport(const Version &clientVersion, const Extensions &extensions)
{
   return extensions.textureStorageEXT && extensions.textureHalfFloatOES;
}

static bool SizedHalfFloatOESTextureAttachmentSupport(const Version &clientVersion,
                                                     const Extensions &extensions)
{
   return SizedHalfFloatOESSupport(clientVersion, extensions) &&
          extensions.colorBufferHalfFloatEXT;
}

// RGB16F, RGBA16F with either HALF_FLOAT_OES or HALF_FLOAT types
static bool SizedHalfFloatSupport(const Version &clientVersion, const Extensions &extensions)
{
   // HALF_FLOAT
   if (clientVersion >= Version(3, 0))
   {
       return true;
   }
   // HALF_FLOAT_OES
   else
   {
       return SizedHalfFloatOESSupport(clientVersion, extensions);
   }
}

static bool SizedHalfFloatFilterSupport(const Version &clientVersion, const Extensions &extensions)
{
   // HALF_FLOAT
   if (clientVersion >= Version(3, 0))
   {
       return true;
   }
   // HALF_FLOAT_OES
   else
   {
       return extensions.textureHalfFloatLinearOES;
   }
}

static bool SizedHalfFloatRGBTextureAttachmentSupport(const Version &clientVersion,
                                                     const Extensions &extensions)
{
   // HALF_FLOAT
   if (clientVersion >= Version(3, 0))
   {
       // It is unclear how EXT_color_buffer_half_float applies to ES3.0 and above, however,
       // dEQP GLES3 es3fFboColorbufferTests.cpp verifies that texture attachment of GL_RGB16F
       // is possible, so assume that all GLES implementations support it.
       // The WebGL version of the extension explicitly forbids RGB formats.
       return extensions.colorBufferHalfFloatEXT && !extensions.webglCompatibilityANGLE;
   }
   // HALF_FLOAT_OES
   else
   {
       return SizedHalfFloatOESTextureAttachmentSupport(clientVersion, extensions);
   }
}

static bool SizedHalfFloatRGBRenderbufferSupport(const Version &clientVersion,
                                                const Extensions &extensions)
{
   return !extensions.webglCompatibilityANGLE &&
          ((clientVersion >= Version(3, 0) || extensions.textureHalfFloatOES) &&
           extensions.colorBufferHalfFloatEXT);
}

static bool SizedHalfFloatRGBATextureAttachmentSupport(const Version &clientVersion,
                                                      const Extensions &extensions)
{
   // HALF_FLOAT
   if (clientVersion >= Version(3, 0))
   {
       // WebGL 2 supports EXT_color_buffer_half_float.
       return extensions.colorBufferFloatEXT ||
              (extensions.webglCompatibilityANGLE && extensions.colorBufferHalfFloatEXT);
   }
   // HALF_FLOAT_OES
   else
   {
       return SizedHalfFloatOESTextureAttachmentSupport(clientVersion, extensions);
   }
}

static bool SizedHalfFloatRGBARenderbufferSupport(const Version &clientVersion,
                                                 const Extensions &extensions)
{
   return (clientVersion >= Version(3, 0) || extensions.textureHalfFloatOES) &&
          (extensions.colorBufferFloatEXT || extensions.colorBufferHalfFloatEXT);
}

// R32F, RG32F
static bool SizedFloatRGSupport(const Version &clientVersion, const Extensions &extensions)
{
   return clientVersion >= Version(3, 0) ||
          (extensions.textureStorageEXT && extensions.textureFloatOES && extensions.textureRgEXT);
}

// RGB32F
static bool SizedFloatRGBSupport(const Version &clientVersion, const Extensions &extensions)
{
   return clientVersion >= Version(3, 0) ||
          (extensions.textureStorageEXT && extensions.textureFloatOES) ||
          extensions.colorBufferFloatRgbCHROMIUM;
}

// RGBA32F
static bool SizedFloatRGBASupport(const Version &clientVersion, const Extensions &extensions)
{
   return clientVersion >= Version(3, 0) ||
          (extensions.textureStorageEXT && extensions.textureFloatOES) ||
          extensions.colorBufferFloatRgbaCHROMIUM;
}

static bool SizedFloatRGBARenderableSupport(const Version &clientVersion,
                                           const Extensions &extensions)
{
   // This logic is the same for both Renderbuffers and TextureAttachment.
   return extensions.colorBufferFloatRgbaCHROMIUM ||  // ES2
          extensions.colorBufferFloatEXT;             // ES3
}

static bool Float32BlendableSupport(const Version &clientVersion, const Extensions &extensions)
{
   // EXT_float_blend may be exposed on ES2 client contexts. Ensure that RGBA32F is renderable.
   return (extensions.colorBufferFloatRgbaCHROMIUM || extensions.colorBufferFloatEXT) &&
          extensions.floatBlendEXT;
}

template <ExtensionBool bool1>
static bool ETC2EACSupport(const Version &clientVersion, const Extensions &extensions)
{
   if (extensions.compressedTextureEtcANGLE)
   {
       return true;
   }

   // ETC2/EAC formats are always available in ES 3.0+ but require an extension (checked above)
   // in WebGL. If that extension is not available, hide these formats from WebGL contexts.
   return !extensions.webglCompatibilityANGLE &&
          (clientVersion >= Version(3, 0) || extensions.*bool1);
}

InternalFormat::InternalFormat()
   : internalFormat(GL_NONE),
     sized(false),
     sizedInternalFormat(GL_NONE),
     redBits(0),
     greenBits(0),
     blueBits(0),
     luminanceBits(0),
     alphaBits(0),
     sharedBits(0),
     depthBits(0),
     stencilBits(0),
     pixelBytes(0),
     componentCount(0),
     compressed(false),
     compressedBlockWidth(0),
     compressedBlockHeight(0),
     compressedBlockDepth(0),
     paletted(false),
     paletteBits(0),
     format(GL_NONE),
     type(GL_NONE),
     componentType(GL_NONE),
     colorEncoding(GL_NONE),
     textureSupport(NeverSupported),
     filterSupport(NeverSupported),
     textureAttachmentSupport(NeverSupported),
     renderbufferSupport(NeverSupported),
     blendSupport(NeverSupported)
{}

InternalFormat::InternalFormat(const InternalFormat &other) = default;

InternalFormat &InternalFormat::operator=(const InternalFormat &other) = default;

bool InternalFormat::isLUMA() const
{
   return ((redBits + greenBits + blueBits + depthBits + stencilBits) == 0 &&
           (luminanceBits + alphaBits) > 0);
}

GLenum InternalFormat::getReadPixelsFormat(const Extensions &extensions) const
{
   switch (format)
   {
       case GL_BGRA_EXT:
           // BGRA textures may be enabled but calling glReadPixels with BGRA is disallowed without
           // GL_EXT_texture_format_BGRA8888.  Read as RGBA instead.
           if (!extensions.readFormatBgraEXT)
           {
               return GL_RGBA;
           }
           return GL_BGRA_EXT;

       default:
           return format;
   }
}

GLenum InternalFormat::getReadPixelsType(const Version &version) const
{
   switch (type)
   {
       case GL_HALF_FLOAT:
       case GL_HALF_FLOAT_OES:
           if (version < Version(3, 0))
           {
               // The internal format may have a type of GL_HALF_FLOAT but when exposing this type
               // as the IMPLEMENTATION_READ_TYPE, only HALF_FLOAT_OES is allowed by
               // OES_texture_half_float.  HALF_FLOAT becomes core in ES3 and is acceptable to use
               // as an IMPLEMENTATION_READ_TYPE.
               return GL_HALF_FLOAT_OES;
           }
           return GL_HALF_FLOAT;

       default:
           return type;
   }
}

bool InternalFormat::supportSubImage() const
{
   return !CompressedFormatRequiresWholeImage(internalFormat);
}

bool InternalFormat::isRequiredRenderbufferFormat(const Version &version) const
{
   // GLES 3.0.5 section 4.4.2.2:
   // "Implementations are required to support the same internal formats for renderbuffers as the
   // required formats for textures enumerated in section 3.8.3.1, with the exception of the color
   // formats labelled "texture-only"."
   if (!sized || compressed)
   {
       return false;
   }

   // Luma formats.
   if (isLUMA())
   {
       return false;
   }

   // Depth/stencil formats.
   if (depthBits > 0 || stencilBits > 0)
   {
       // GLES 2.0.25 table 4.5.
       // GLES 3.0.5 section 3.8.3.1.
       // GLES 3.1 table 8.14.

       // Required formats in all versions.
       switch (internalFormat)
       {
           case GL_DEPTH_COMPONENT16:
           case GL_STENCIL_INDEX8:
               // Note that STENCIL_INDEX8 is not mentioned in GLES 3.0.5 section 3.8.3.1, but it
               // is in section 4.4.2.2.
               return true;
           default:
               break;
       }
       if (version.major < 3)
       {
           return false;
       }
       // Required formats in GLES 3.0 and up.
       switch (internalFormat)
       {
           case GL_DEPTH_COMPONENT32F:
           case GL_DEPTH_COMPONENT24:
           case GL_DEPTH32F_STENCIL8:
           case GL_DEPTH24_STENCIL8:
               return true;
           default:
               return false;
       }
   }

   // RGBA formats.
   // GLES 2.0.25 table 4.5.
   // GLES 3.0.5 section 3.8.3.1.
   // GLES 3.1 table 8.13.

   // Required formats in all versions.
   switch (internalFormat)
   {
       case GL_RGBA4:
       case GL_RGB5_A1:
       case GL_RGB565:
           return true;
       default:
           break;
   }
   if (version.major < 3)
   {
       return false;
   }

   if (format == GL_BGRA_EXT)
   {
       return false;
   }

   switch (componentType)
   {
       case GL_SIGNED_NORMALIZED:
       case GL_FLOAT:
           return false;
       case GL_UNSIGNED_INT:
       case GL_INT:
           // Integer RGB formats are not required renderbuffer formats.
           if (alphaBits == 0 && blueBits != 0)
           {
               return false;
           }
           // All integer R and RG formats are required.
           // Integer RGBA formats including RGB10_A2_UI are required.
           return true;
       case GL_UNSIGNED_NORMALIZED:
           if (internalFormat == GL_SRGB8)
           {
               return false;
           }
           return true;
       default:
           UNREACHABLE();
           return false;
   }
}

bool InternalFormat::isInt() const
{
   return componentType == GL_INT || componentType == GL_UNSIGNED_INT;
}

bool InternalFormat::isDepthOrStencil() const
{
   return depthBits != 0 || stencilBits != 0;
}

Format::Format(GLenum internalFormat) : Format(GetSizedInternalFormatInfo(internalFormat)) {}

Format::Format(const InternalFormat &internalFormat) : info(&internalFormat) {}

Format::Format(GLenum internalFormat, GLenum type)
   : info(&GetInternalFormatInfo(internalFormat, type))
{}

Format::Format(const Format &other)            = default;
Format &Format::operator=(const Format &other) = default;

bool Format::valid() const
{
   return info->internalFormat != GL_NONE;
}

// static
bool Format::SameSized(const Format &a, const Format &b)
{
   return a.info->sizedInternalFormat == b.info->sizedInternalFormat;
}

static GLenum EquivalentBlitInternalFormat(GLenum internalformat)
{
   // BlitFramebuffer works if the color channels are identically
   // sized, even if there is a swizzle (for example, blitting from a
   // multisampled RGBA8 renderbuffer to a BGRA8 texture). This could
   // be expanded and/or autogenerated if that is found necessary.
   if (internalformat == GL_BGRA8_EXT)
   {
       return GL_RGBA8;
   }

   // GL_ANGLE_rgbx_internal_format: Treat RGBX8 as RGB8, since the X channel is ignored.
   if (internalformat == GL_RGBX8_ANGLE)
   {
       return GL_RGB8;
   }

   // Treat ANGLE's BGRX8 as RGB8 since it's swizzled and the X channel is ignored.
   if (internalformat == GL_BGRX8_ANGLEX)
   {
       return GL_RGB8;
   }

   return internalformat;
}

// static
bool Format::EquivalentForBlit(const Format &a, const Format &b)
{
   return (EquivalentBlitInternalFormat(a.info->sizedInternalFormat) ==
           EquivalentBlitInternalFormat(b.info->sizedInternalFormat));
}

// static
Format Format::Invalid()
{
   static Format invalid(GL_NONE, GL_NONE);
   return invalid;
}

std::ostream &operator<<(std::ostream &os, const Format &fmt)
{
   // TODO(ynovikov): return string representation when available
   return FmtHex(os, fmt.info->sizedInternalFormat);
}

bool InternalFormat::operator==(const InternalFormat &other) const
{
   // We assume all internal formats are unique if they have the same internal format and type
   return internalFormat == other.internalFormat && type == other.type;
}

bool InternalFormat::operator!=(const InternalFormat &other) const
{
   return !(*this == other);
}

void InsertFormatInfo(InternalFormatInfoMap *map, const InternalFormat &formatInfo)
{
   ASSERT(!formatInfo.sized || (*map).count(formatInfo.internalFormat) == 0);
   ASSERT((*map)[formatInfo.internalFormat].count(formatInfo.type) == 0);
   (*map)[formatInfo.internalFormat][formatInfo.type] = formatInfo;
}

// YuvFormatInfo implementation
YuvFormatInfo::YuvFormatInfo(GLenum internalFormat, const Extents &yPlaneExtent)
{
   ASSERT(gl::IsYuvFormat(internalFormat));
   ASSERT((gl::GetPlaneCount(internalFormat) > 0) && (gl::GetPlaneCount(internalFormat) <= 3));

   glInternalFormat = internalFormat;
   planeCount       = gl::GetPlaneCount(internalFormat);

   // Chroma planes of a YUV format can be subsampled
   int horizontalSubsampleFactor = 0;
   int verticalSubsampleFactor   = 0;
   gl::GetSubSampleFactor(internalFormat, &horizontalSubsampleFactor, &verticalSubsampleFactor);

   // Compute plane Bpp
   planeBpp[0] = gl::GetYPlaneBpp(internalFormat);
   planeBpp[1] = gl::GetChromaPlaneBpp(internalFormat);
   planeBpp[2] = (planeCount > 2) ? planeBpp[1] : 0;

   // Compute plane extent
   planeExtent[0] = yPlaneExtent;
   planeExtent[1] = {(yPlaneExtent.width / horizontalSubsampleFactor),
                     (yPlaneExtent.height / verticalSubsampleFactor), yPlaneExtent.depth};
   planeExtent[2] = (planeCount > 2) ? planeExtent[1] : Extents();

   // Compute plane pitch
   planePitch[0] = planeExtent[0].width * planeBpp[0];
   planePitch[1] = planeExtent[1].width * planeBpp[1];
   planePitch[2] = planeExtent[2].width * planeBpp[2];

   // Compute plane size
   planeSize[0] = planePitch[0] * planeExtent[0].height;
   planeSize[1] = planePitch[1] * planeExtent[1].height;
   planeSize[2] = planePitch[2] * planeExtent[2].height;

   // Compute plane offset
   planeOffset[0] = 0;
   planeOffset[1] = planeSize[0];
   planeOffset[2] = planeSize[0] + planeSize[1];
}

// YUV format related helpers
bool IsYuvFormat(GLenum format)
{
   switch (format)
   {
       case GL_G8_B8R8_2PLANE_420_UNORM_ANGLE:
       case GL_G8_B8_R8_3PLANE_420_UNORM_ANGLE:
       case GL_G10X6_B10X6R10X6_2PLANE_420_UNORM_3PACK16_ANGLE:
       case GL_G10X6_B10X6_R10X6_3PLANE_420_UNORM_3PACK16_ANGLE:
       case GL_G12X4_B12X4R12X4_2PLANE_420_UNORM_3PACK16_ANGLE:
       case GL_G12X4_B12X4_R12X4_3PLANE_420_UNORM_3PACK16_ANGLE:
       case GL_G16_B16R16_2PLANE_420_UNORM_ANGLE:
       case GL_G16_B16_R16_3PLANE_420_UNORM_ANGLE:
           return true;
       default:
           return false;
   }
}

uint32_t GetPlaneCount(GLenum format)
{
   switch (format)
   {
       case GL_G8_B8R8_2PLANE_420_UNORM_ANGLE:
       case GL_G10X6_B10X6R10X6_2PLANE_420_UNORM_3PACK16_ANGLE:
       case GL_G12X4_B12X4R12X4_2PLANE_420_UNORM_3PACK16_ANGLE:
       case GL_G16_B16R16_2PLANE_420_UNORM_ANGLE:
           return 2;
       case GL_G8_B8_R8_3PLANE_420_UNORM_ANGLE:
       case GL_G10X6_B10X6_R10X6_3PLANE_420_UNORM_3PACK16_ANGLE:
       case GL_G12X4_B12X4_R12X4_3PLANE_420_UNORM_3PACK16_ANGLE:
       case GL_G16_B16_R16_3PLANE_420_UNORM_ANGLE:
           return 3;
       default:
           UNREACHABLE();
           return 0;
   }
}

uint32_t GetYPlaneBpp(GLenum format)
{
   switch (format)
   {
       case GL_G8_B8R8_2PLANE_420_UNORM_ANGLE:
       case GL_G8_B8_R8_3PLANE_420_UNORM_ANGLE:
           return 1;
       case GL_G10X6_B10X6R10X6_2PLANE_420_UNORM_3PACK16_ANGLE:
       case GL_G10X6_B10X6_R10X6_3PLANE_420_UNORM_3PACK16_ANGLE:
       case GL_G12X4_B12X4R12X4_2PLANE_420_UNORM_3PACK16_ANGLE:
       case GL_G12X4_B12X4_R12X4_3PLANE_420_UNORM_3PACK16_ANGLE:
       case GL_G16_B16R16_2PLANE_420_UNORM_ANGLE:
       case GL_G16_B16_R16_3PLANE_420_UNORM_ANGLE:
           return 2;
       default:
           UNREACHABLE();
           return 0;
   }
}

uint32_t GetChromaPlaneBpp(GLenum format)
{
   // 2 plane 420 YUV formats have CbCr channels interleaved.
   // 3 plane 420 YUV formats have separate Cb and Cr planes.
   switch (format)
   {
       case GL_G8_B8_R8_3PLANE_420_UNORM_ANGLE:
           return 1;
       case GL_G8_B8R8_2PLANE_420_UNORM_ANGLE:
       case GL_G10X6_B10X6_R10X6_3PLANE_420_UNORM_3PACK16_ANGLE:
       case GL_G12X4_B12X4_R12X4_3PLANE_420_UNORM_3PACK16_ANGLE:
       case GL_G16_B16_R16_3PLANE_420_UNORM_ANGLE:
           return 2;
       case GL_G10X6_B10X6R10X6_2PLANE_420_UNORM_3PACK16_ANGLE:
       case GL_G12X4_B12X4R12X4_2PLANE_420_UNORM_3PACK16_ANGLE:
       case GL_G16_B16R16_2PLANE_420_UNORM_ANGLE:
           return 4;
       default:
           UNREACHABLE();
           return 0;
   }
}

void GetSubSampleFactor(GLenum format, int *horizontalSubsampleFactor, int *verticalSubsampleFactor)
{
   ASSERT(horizontalSubsampleFactor && verticalSubsampleFactor);

   switch (format)
   {
       case GL_G8_B8R8_2PLANE_420_UNORM_ANGLE:
       case GL_G8_B8_R8_3PLANE_420_UNORM_ANGLE:
       case GL_G10X6_B10X6R10X6_2PLANE_420_UNORM_3PACK16_ANGLE:
       case GL_G10X6_B10X6_R10X6_3PLANE_420_UNORM_3PACK16_ANGLE:
       case GL_G12X4_B12X4R12X4_2PLANE_420_UNORM_3PACK16_ANGLE:
       case GL_G12X4_B12X4_R12X4_3PLANE_420_UNORM_3PACK16_ANGLE:
       case GL_G16_B16R16_2PLANE_420_UNORM_ANGLE:
       case GL_G16_B16_R16_3PLANE_420_UNORM_ANGLE:
           *horizontalSubsampleFactor = 2;
           *verticalSubsampleFactor   = 2;
           break;
       default:
           UNREACHABLE();
           break;
   }
}

struct FormatBits
{
   constexpr GLuint pixelBytes() const
   {
       return (red + green + blue + alpha + shared + unused) / 8;
   }
   constexpr GLuint componentCount() const
   {
       return ((red > 0) ? 1 : 0) + ((green > 0) ? 1 : 0) + ((blue > 0) ? 1 : 0) +
              ((alpha > 0) ? 1 : 0);
   }
   constexpr bool valid() const
   {
       return ((red + green + blue + alpha + shared + unused) % 8) == 0;
   }

   GLuint red;
   GLuint green;
   GLuint blue;
   GLuint alpha;
   GLuint unused;
   GLuint shared;
};

template <GLuint red, GLuint green, GLuint blue, GLuint alpha, GLuint unused, GLuint shared>
constexpr FormatBits FB()
{
   constexpr FormatBits formatBits = {red, green, blue, alpha, unused, shared};
   static_assert(formatBits.valid(), "Invalid FormatBits");
   return formatBits;
}

void AddRGBAXFormat(InternalFormatInfoMap *map,
                   GLenum internalFormat,
                   bool sized,
                   const FormatBits &formatBits,
                   GLenum format,
                   GLenum type,
                   GLenum componentType,
                   bool srgb,
                   InternalFormat::SupportCheckFunction textureSupport,
                   InternalFormat::SupportCheckFunction filterSupport,
                   InternalFormat::SupportCheckFunction textureAttachmentSupport,
                   InternalFormat::SupportCheckFunction renderbufferSupport,
                   InternalFormat::SupportCheckFunction blendSupport)
{
   ASSERT(formatBits.valid());

   InternalFormat formatInfo;
   formatInfo.internalFormat = internalFormat;
   formatInfo.sized          = sized;
   formatInfo.sizedInternalFormat =
       sized ? internalFormat : GetSizedFormatInternal(internalFormat, type);
   formatInfo.redBits                  = formatBits.red;
   formatInfo.greenBits                = formatBits.green;
   formatInfo.blueBits                 = formatBits.blue;
   formatInfo.alphaBits                = formatBits.alpha;
   formatInfo.sharedBits               = formatBits.shared;
   formatInfo.pixelBytes               = formatBits.pixelBytes();
   formatInfo.componentCount           = formatBits.componentCount();
   formatInfo.format                   = format;
   formatInfo.type                     = type;
   formatInfo.componentType            = componentType;
   formatInfo.colorEncoding            = (srgb ? GL_SRGB : GL_LINEAR);
   formatInfo.textureSupport           = textureSupport;
   formatInfo.filterSupport            = filterSupport;
   formatInfo.textureAttachmentSupport = textureAttachmentSupport;
   formatInfo.renderbufferSupport      = renderbufferSupport;
   formatInfo.blendSupport             = blendSupport;

   InsertFormatInfo(map, formatInfo);
}

void AddRGBAFormat(InternalFormatInfoMap *map,
                  GLenum internalFormat,
                  bool sized,
                  GLuint red,
                  GLuint green,
                  GLuint blue,
                  GLuint alpha,
                  GLuint shared,
                  GLenum format,
                  GLenum type,
                  GLenum componentType,
                  bool srgb,
                  InternalFormat::SupportCheckFunction textureSupport,
                  InternalFormat::SupportCheckFunction filterSupport,
                  InternalFormat::SupportCheckFunction textureAttachmentSupport,
                  InternalFormat::SupportCheckFunction renderbufferSupport,
                  InternalFormat::SupportCheckFunction blendSupport)
{
   return AddRGBAXFormat(map, internalFormat, sized, {red, green, blue, alpha, 0, shared}, format,
                         type, componentType, srgb, textureSupport, filterSupport,
                         textureAttachmentSupport, renderbufferSupport, blendSupport);
}

static void AddLUMAFormat(InternalFormatInfoMap *map,
                         GLenum internalFormat,
                         bool sized,
                         GLuint luminance,
                         GLuint alpha,
                         GLenum format,
                         GLenum type,
                         GLenum componentType,
                         InternalFormat::SupportCheckFunction textureSupport,
                         InternalFormat::SupportCheckFunction filterSupport,
                         InternalFormat::SupportCheckFunction textureAttachmentSupport,
                         InternalFormat::SupportCheckFunction renderbufferSupport,
                         InternalFormat::SupportCheckFunction blendSupport)
{
   InternalFormat formatInfo;
   formatInfo.internalFormat = internalFormat;
   formatInfo.sized          = sized;
   formatInfo.sizedInternalFormat =
       sized ? internalFormat : GetSizedFormatInternal(internalFormat, type);
   formatInfo.luminanceBits            = luminance;
   formatInfo.alphaBits                = alpha;
   formatInfo.pixelBytes               = (luminance + alpha) / 8;
   formatInfo.componentCount           = ((luminance > 0) ? 1 : 0) + ((alpha > 0) ? 1 : 0);
   formatInfo.format                   = format;
   formatInfo.type                     = type;
   formatInfo.componentType            = componentType;
   formatInfo.colorEncoding            = GL_LINEAR;
   formatInfo.textureSupport           = textureSupport;
   formatInfo.filterSupport            = filterSupport;
   formatInfo.textureAttachmentSupport = textureAttachmentSupport;
   formatInfo.renderbufferSupport      = renderbufferSupport;
   formatInfo.blendSupport             = blendSupport;

   InsertFormatInfo(map, formatInfo);
}

void AddDepthStencilFormat(InternalFormatInfoMap *map,
                          GLenum internalFormat,
                          bool sized,
                          GLuint depthBits,
                          GLuint stencilBits,
                          GLuint unusedBits,
                          GLenum format,
                          GLenum type,
                          GLenum componentType,
                          InternalFormat::SupportCheckFunction textureSupport,
                          InternalFormat::SupportCheckFunction filterSupport,
                          InternalFormat::SupportCheckFunction textureAttachmentSupport,
                          InternalFormat::SupportCheckFunction renderbufferSupport,
                          InternalFormat::SupportCheckFunction blendSupport)
{
   InternalFormat formatInfo;
   formatInfo.internalFormat = internalFormat;
   formatInfo.sized          = sized;
   formatInfo.sizedInternalFormat =
       sized ? internalFormat : GetSizedFormatInternal(internalFormat, type);
   formatInfo.depthBits                = depthBits;
   formatInfo.stencilBits              = stencilBits;
   formatInfo.pixelBytes               = (depthBits + stencilBits + unusedBits) / 8;
   formatInfo.componentCount           = ((depthBits > 0) ? 1 : 0) + ((stencilBits > 0) ? 1 : 0);
   formatInfo.format                   = format;
   formatInfo.type                     = type;
   formatInfo.componentType            = componentType;
   formatInfo.colorEncoding            = GL_LINEAR;
   formatInfo.textureSupport           = textureSupport;
   formatInfo.filterSupport            = filterSupport;
   formatInfo.textureAttachmentSupport = textureAttachmentSupport;
   formatInfo.renderbufferSupport      = renderbufferSupport;
   formatInfo.blendSupport             = blendSupport;

   InsertFormatInfo(map, formatInfo);
}

void AddCompressedFormat(InternalFormatInfoMap *map,
                        GLenum internalFormat,
                        GLuint compressedBlockWidth,
                        GLuint compressedBlockHeight,
                        GLuint compressedBlockDepth,
                        GLuint compressedBlockSize,
                        GLuint componentCount,
                        bool srgb,
                        InternalFormat::SupportCheckFunction textureSupport,
                        InternalFormat::SupportCheckFunction filterSupport,
                        InternalFormat::SupportCheckFunction textureAttachmentSupport,
                        InternalFormat::SupportCheckFunction renderbufferSupport,
                        InternalFormat::SupportCheckFunction blendSupport)
{
   InternalFormat formatInfo;
   formatInfo.internalFormat           = internalFormat;
   formatInfo.sized                    = true;
   formatInfo.sizedInternalFormat      = internalFormat;
   formatInfo.compressedBlockWidth     = compressedBlockWidth;
   formatInfo.compressedBlockHeight    = compressedBlockHeight;
   formatInfo.compressedBlockDepth     = compressedBlockDepth;
   formatInfo.pixelBytes               = compressedBlockSize / 8;
   formatInfo.componentCount           = componentCount;
   formatInfo.format                   = internalFormat;
   formatInfo.type                     = GL_UNSIGNED_BYTE;
   formatInfo.componentType            = GL_UNSIGNED_NORMALIZED;
   formatInfo.colorEncoding            = (srgb ? GL_SRGB : GL_LINEAR);
   formatInfo.compressed               = true;
   formatInfo.textureSupport           = textureSupport;
   formatInfo.filterSupport            = filterSupport;
   formatInfo.textureAttachmentSupport = textureAttachmentSupport;
   formatInfo.renderbufferSupport      = renderbufferSupport;
   formatInfo.blendSupport             = blendSupport;

   InsertFormatInfo(map, formatInfo);
}

void AddPalettedFormat(InternalFormatInfoMap *map,
                      GLenum internalFormat,
                      GLuint paletteBits,
                      GLuint pixelBytes,
                      GLenum format,
                      GLuint componentCount,
                      InternalFormat::SupportCheckFunction textureSupport,
                      InternalFormat::SupportCheckFunction filterSupport,
                      InternalFormat::SupportCheckFunction textureAttachmentSupport,
                      InternalFormat::SupportCheckFunction renderbufferSupport,
                      InternalFormat::SupportCheckFunction blendSupport)
{
   InternalFormat formatInfo;
   formatInfo.internalFormat           = internalFormat;
   formatInfo.sized                    = true;
   formatInfo.sizedInternalFormat      = internalFormat;
   formatInfo.paletteBits              = paletteBits;
   formatInfo.pixelBytes               = pixelBytes;
   formatInfo.componentCount           = componentCount;
   formatInfo.format                   = format;
   formatInfo.type                     = GL_UNSIGNED_BYTE;
   formatInfo.componentType            = GL_UNSIGNED_NORMALIZED;
   formatInfo.colorEncoding            = GL_LINEAR;
   formatInfo.paletted                 = true;
   formatInfo.textureSupport           = textureSupport;
   formatInfo.filterSupport            = filterSupport;
   formatInfo.textureAttachmentSupport = textureAttachmentSupport;
   formatInfo.renderbufferSupport      = renderbufferSupport;
   formatInfo.blendSupport             = blendSupport;

   InsertFormatInfo(map, formatInfo);
}

void AddYUVFormat(InternalFormatInfoMap *map,
                 GLenum internalFormat,
                 bool sized,
                 GLuint cr,
                 GLuint y,
                 GLuint cb,
                 GLuint alpha,
                 GLuint shared,
                 GLenum format,
                 GLenum type,
                 GLenum componentType,
                 bool srgb,
                 InternalFormat::SupportCheckFunction textureSupport,
                 InternalFormat::SupportCheckFunction filterSupport,
                 InternalFormat::SupportCheckFunction textureAttachmentSupport,
                 InternalFormat::SupportCheckFunction renderbufferSupport,
                 InternalFormat::SupportCheckFunction blendSupport)
{
   ASSERT(sized);

   InternalFormat formatInfo;
   formatInfo.internalFormat      = internalFormat;
   formatInfo.sized               = sized;
   formatInfo.sizedInternalFormat = internalFormat;
   formatInfo.redBits             = cr;
   formatInfo.greenBits           = y;
   formatInfo.blueBits            = cb;
   formatInfo.alphaBits           = alpha;
   formatInfo.sharedBits          = shared;
   formatInfo.pixelBytes          = (cr + y + cb + alpha + shared) / 8;
   formatInfo.componentCount =
       ((cr > 0) ? 1 : 0) + ((y > 0) ? 1 : 0) + ((cb > 0) ? 1 : 0) + ((alpha > 0) ? 1 : 0);
   formatInfo.format                   = format;
   formatInfo.type                     = type;
   formatInfo.componentType            = componentType;
   formatInfo.colorEncoding            = (srgb ? GL_SRGB : GL_LINEAR);
   formatInfo.textureSupport           = textureSupport;
   formatInfo.filterSupport            = filterSupport;
   formatInfo.textureAttachmentSupport = textureAttachmentSupport;
   formatInfo.renderbufferSupport      = renderbufferSupport;
   formatInfo.blendSupport             = blendSupport;

   InsertFormatInfo(map, formatInfo);
}

// Notes:
// 1. "Texture supported" includes all the means by which texture can be created, however,
//    GL_EXT_texture_storage in ES2 is a special case, when only glTexStorage* is allowed.
//    The assumption is that ES2 validation will not check textureSupport for sized formats.
//
// 2. Sized half float types are a combination of GL_HALF_FLOAT and GL_HALF_FLOAT_OES support,
//    due to a limitation that only one type for sized formats is allowed.
//
// TODO(ynovikov): http://anglebug.com/2846 Verify support fields of BGRA, depth, stencil
// and compressed formats. Perform texturable check as part of filterable and attachment checks.
static InternalFormatInfoMap BuildInternalFormatInfoMap()
{
   InternalFormatInfoMap map;

   // From ES 3.0.1 spec, table 3.12
   map[GL_NONE][GL_NONE] = InternalFormat();

   // clang-format off

   //                 | Internal format     |sized| R | G | B | A |S | Format         | Type                             | Component type        | SRGB | Texture supported                                | Filterable     | Texture attachment                               | Renderbuffer                                   | Blend
   AddRGBAFormat(&map, GL_R8,                true,  8,  0,  0,  0, 0, GL_RED,          GL_UNSIGNED_BYTE,                  GL_UNSIGNED_NORMALIZED, false, SizedRGSupport,                                       AlwaysSupported, SizedRGSupport,                                          RequireESOrExt<3, 0, &Extensions::textureRgEXT>, RequireESOrExt<3, 0, &Extensions::textureRgEXT>);
   AddRGBAFormat(&map, GL_R8_SNORM,          true,  8,  0,  0,  0, 0, GL_RED,          GL_BYTE,                           GL_SIGNED_NORMALIZED,   false, RequireES<3, 0>,                                      AlwaysSupported, NeverSupported,                                          NeverSupported,                                  NeverSupported);
   AddRGBAFormat(&map, GL_RG8,               true,  8,  8,  0,  0, 0, GL_RG,           GL_UNSIGNED_BYTE,                  GL_UNSIGNED_NORMALIZED, false, SizedRGSupport,                                       AlwaysSupported, SizedRGSupport,                                          RequireESOrExt<3, 0, &Extensions::textureRgEXT>, RequireESOrExt<3, 0, &Extensions::textureRgEXT>);
   AddRGBAFormat(&map, GL_RG8_SNORM,         true,  8,  8,  0,  0, 0, GL_RG,           GL_BYTE,                           GL_SIGNED_NORMALIZED,   false, RequireES<3, 0>,                                      AlwaysSupported, NeverSupported,                                          NeverSupported,                                  NeverSupported);
   AddRGBAFormat(&map, GL_RGB8,              true,  8,  8,  8,  0, 0, GL_RGB,          GL_UNSIGNED_BYTE,                  GL_UNSIGNED_NORMALIZED, false, RequireESOrExt<3, 0, &Extensions::textureStorageEXT>, AlwaysSupported, RequireESOrExt<3, 0, &Extensions::textureStorageEXT>, RequireESOrExt<3, 0, &Extensions::rgb8Rgba8OES>,    RequireESOrExt<3, 0, &Extensions::rgb8Rgba8OES>);
   AddRGBAFormat(&map, GL_RGB8_SNORM,        true,  8,  8,  8,  0, 0, GL_RGB,          GL_BYTE,                           GL_SIGNED_NORMALIZED,   false, RequireES<3, 0>,                                      AlwaysSupported, NeverSupported,                                          NeverSupported,                                  NeverSupported);
   AddRGBAFormat(&map, GL_RGB565,            true,  5,  6,  5,  0, 0, GL_RGB,          GL_UNSIGNED_SHORT_5_6_5,           GL_UNSIGNED_NORMALIZED, false, RequireESOrExt<3, 0, &Extensions::textureStorageEXT>, AlwaysSupported, RequireESOrExt<3, 0, &Extensions::textureStorageEXT>, RequireES<2, 0>,                                    RequireES<2, 0>);
   AddRGBAFormat(&map, GL_RGBA4,             true,  4,  4,  4,  4, 0, GL_RGBA,         GL_UNSIGNED_SHORT_4_4_4_4,         GL_UNSIGNED_NORMALIZED, false, RequireESOrExt<3, 0, &Extensions::textureStorageEXT>, AlwaysSupported, RequireESOrExt<3, 0, &Extensions::textureStorageEXT>, RequireES<2, 0>,                                    RequireES<2, 0>);
   AddRGBAFormat(&map, GL_RGB5_A1,           true,  5,  5,  5,  1, 0, GL_RGBA,         GL_UNSIGNED_SHORT_5_5_5_1,         GL_UNSIGNED_NORMALIZED, false, RequireESOrExt<3, 0, &Extensions::textureStorageEXT>, AlwaysSupported, RequireESOrExt<3, 0, &Extensions::textureStorageEXT>, RequireES<2, 0>,                                    RequireES<2, 0>);
   AddRGBAFormat(&map, GL_RGBA8,             true,  8,  8,  8,  8, 0, GL_RGBA,         GL_UNSIGNED_BYTE,                  GL_UNSIGNED_NORMALIZED, false, RequireESOrExt<3, 0, &Extensions::textureStorageEXT>, AlwaysSupported, RequireESOrExt<3, 0, &Extensions::textureStorageEXT>, RequireESOrExt<3, 0, &Extensions::rgb8Rgba8OES>,    RequireESOrExt<3, 0, &Extensions::rgb8Rgba8OES>);
   AddRGBAFormat(&map, GL_RGBA8_SNORM,       true,  8,  8,  8,  8, 0, GL_RGBA,         GL_BYTE,                           GL_SIGNED_NORMALIZED,   false, RequireES<3, 0>,                                      AlwaysSupported, NeverSupported,                                          NeverSupported,                                  NeverSupported);
   AddRGBAFormat(&map, GL_RGB10_A2UI,        true, 10, 10, 10,  2, 0, GL_RGBA_INTEGER, GL_UNSIGNED_INT_2_10_10_10_REV,    GL_UNSIGNED_INT,        false, RequireES<3, 0>,                                      NeverSupported,  RequireES<3, 0>,                                         RequireES<3, 0>,                                 NeverSupported);
   AddRGBAFormat(&map, GL_SRGB8,             true,  8,  8,  8,  0, 0, GL_RGB,          GL_UNSIGNED_BYTE,                  GL_UNSIGNED_NORMALIZED, true,  RequireES<3, 0>,                                      AlwaysSupported, NeverSupported,                                          NeverSupported,                                  NeverSupported);
   AddRGBAFormat(&map, GL_SRGB8_ALPHA8,      true,  8,  8,  8,  8, 0, GL_RGBA,         GL_UNSIGNED_BYTE,                  GL_UNSIGNED_NORMALIZED, true,  RequireESOrExt<3, 0, &Extensions::sRGBEXT>,           AlwaysSupported, RequireES<3, 0>,                                         RequireESOrExt<3, 0, &Extensions::sRGBEXT>,      RequireESOrExt<3, 0, &Extensions::sRGBEXT>);
   AddRGBAFormat(&map, GL_R11F_G11F_B10F,    true, 11, 11, 10,  0, 0, GL_RGB,          GL_UNSIGNED_INT_10F_11F_11F_REV,   GL_FLOAT,               false, RequireES<3, 0>,                                      AlwaysSupported, RequireExt<&Extensions::colorBufferFloatEXT>,            RequireExt<&Extensions::colorBufferFloatEXT>,    RequireExt<&Extensions::colorBufferFloatEXT>);
   AddRGBAFormat(&map, GL_RGB9_E5,           true,  9,  9,  9,  0, 5, GL_RGB,          GL_UNSIGNED_INT_5_9_9_9_REV,       GL_FLOAT,               false, RequireES<3, 0>,                                      AlwaysSupported, NeverSupported,                                          NeverSupported,                                  NeverSupported);
   AddRGBAFormat(&map, GL_R8I,               true,  8,  0,  0,  0, 0, GL_RED_INTEGER,  GL_BYTE,                           GL_INT,                 false, RequireES<3, 0>,                                      NeverSupported,  RequireES<3, 0>,                                         RequireES<3, 0>,                                 NeverSupported);
   AddRGBAFormat(&map, GL_R8UI,              true,  8,  0,  0,  0, 0, GL_RED_INTEGER,  GL_UNSIGNED_BYTE,                  GL_UNSIGNED_INT,        false, RequireES<3, 0>,                                      NeverSupported,  RequireES<3, 0>,                                         RequireES<3, 0>,                                 NeverSupported);
   AddRGBAFormat(&map, GL_R16I,              true, 16,  0,  0,  0, 0, GL_RED_INTEGER,  GL_SHORT,                          GL_INT,                 false, RequireES<3, 0>,                                      NeverSupported,  RequireES<3, 0>,                                         RequireES<3, 0>,                                 NeverSupported);
   AddRGBAFormat(&map, GL_R16UI,             true, 16,  0,  0,  0, 0, GL_RED_INTEGER,  GL_UNSIGNED_SHORT,                 GL_UNSIGNED_INT,        false, RequireES<3, 0>,                                      NeverSupported,  RequireES<3, 0>,                                         RequireES<3, 0>,                                 NeverSupported);
   AddRGBAFormat(&map, GL_R32I,              true, 32,  0,  0,  0, 0, GL_RED_INTEGER,  GL_INT,                            GL_INT,                 false, RequireES<3, 0>,                                      NeverSupported,  RequireES<3, 0>,                                         RequireES<3, 0>,                                 NeverSupported);
   AddRGBAFormat(&map, GL_R32UI,             true, 32,  0,  0,  0, 0, GL_RED_INTEGER,  GL_UNSIGNED_INT,                   GL_UNSIGNED_INT,        false, RequireES<3, 0>,                                      NeverSupported,  RequireES<3, 0>,                                         RequireES<3, 0>,                                 NeverSupported);
   AddRGBAFormat(&map, GL_RG8I,              true,  8,  8,  0,  0, 0, GL_RG_INTEGER,   GL_BYTE,                           GL_INT,                 false, RequireES<3, 0>,                                      NeverSupported,  RequireES<3, 0>,                                         RequireES<3, 0>,                                 NeverSupported);
   AddRGBAFormat(&map, GL_RG8UI,             true,  8,  8,  0,  0, 0, GL_RG_INTEGER,   GL_UNSIGNED_BYTE,                  GL_UNSIGNED_INT,        false, RequireES<3, 0>,                                      NeverSupported,  RequireES<3, 0>,                                         RequireES<3, 0>,                                 NeverSupported);
   AddRGBAFormat(&map, GL_RG16I,             true, 16, 16,  0,  0, 0, GL_RG_INTEGER,   GL_SHORT,                          GL_INT,                 false, RequireES<3, 0>,                                      NeverSupported,  RequireES<3, 0>,                                         RequireES<3, 0>,                                 NeverSupported);
   AddRGBAFormat(&map, GL_RG16UI,            true, 16, 16,  0,  0, 0, GL_RG_INTEGER,   GL_UNSIGNED_SHORT,                 GL_UNSIGNED_INT,        false, RequireES<3, 0>,                                      NeverSupported,  RequireES<3, 0>,                                         RequireES<3, 0>,                                 NeverSupported);
   AddRGBAFormat(&map, GL_RG32I,             true, 32, 32,  0,  0, 0, GL_RG_INTEGER,   GL_INT,                            GL_INT,                 false, RequireES<3, 0>,                                      NeverSupported,  RequireES<3, 0>,                                         RequireES<3, 0>,                                 NeverSupported);
   AddRGBAFormat(&map, GL_RG32UI,            true, 32, 32,  0,  0, 0, GL_RG_INTEGER,   GL_UNSIGNED_INT,                   GL_UNSIGNED_INT,        false, RequireES<3, 0>,                                      NeverSupported,  RequireES<3, 0>,                                         RequireES<3, 0>,                                 NeverSupported);
   AddRGBAFormat(&map, GL_RGB8I,             true,  8,  8,  8,  0, 0, GL_RGB_INTEGER,  GL_BYTE,                           GL_INT,                 false, RequireES<3, 0>,                                      NeverSupported,  NeverSupported,                                          NeverSupported,                                  NeverSupported);
   AddRGBAFormat(&map, GL_RGB8UI,            true,  8,  8,  8,  0, 0, GL_RGB_INTEGER,  GL_UNSIGNED_BYTE,                  GL_UNSIGNED_INT,        false, RequireES<3, 0>,                                      NeverSupported,  NeverSupported,                                          NeverSupported,                                  NeverSupported);
   AddRGBAFormat(&map, GL_RGB16I,            true, 16, 16, 16,  0, 0, GL_RGB_INTEGER,  GL_SHORT,                          GL_INT,                 false, RequireES<3, 0>,                                      NeverSupported,  NeverSupported,                                          NeverSupported,                                  NeverSupported);
   AddRGBAFormat(&map, GL_RGB16UI,           true, 16, 16, 16,  0, 0, GL_RGB_INTEGER,  GL_UNSIGNED_SHORT,                 GL_UNSIGNED_INT,        false, RequireES<3, 0>,                                      NeverSupported,  NeverSupported,                                          NeverSupported,                                  NeverSupported);
   AddRGBAFormat(&map, GL_RGB32I,            true, 32, 32, 32,  0, 0, GL_RGB_INTEGER,  GL_INT,                            GL_INT,                 false, RequireES<3, 0>,                                      NeverSupported,  NeverSupported,                                          NeverSupported,                                  NeverSupported);
   AddRGBAFormat(&map, GL_RGB32UI,           true, 32, 32, 32,  0, 0, GL_RGB_INTEGER,  GL_UNSIGNED_INT,                   GL_UNSIGNED_INT,        false, RequireES<3, 0>,                                      NeverSupported,  NeverSupported,                                          NeverSupported,                                  NeverSupported);
   AddRGBAFormat(&map, GL_RGBA8I,            true,  8,  8,  8,  8, 0, GL_RGBA_INTEGER, GL_BYTE,                           GL_INT,                 false, RequireES<3, 0>,                                      NeverSupported,  RequireES<3, 0>,                                         RequireES<3, 0>,                                 NeverSupported);
   AddRGBAFormat(&map, GL_RGBA8UI,           true,  8,  8,  8,  8, 0, GL_RGBA_INTEGER, GL_UNSIGNED_BYTE,                  GL_UNSIGNED_INT,        false, RequireES<3, 0>,                                      NeverSupported,  RequireES<3, 0>,                                         RequireES<3, 0>,                                 NeverSupported);
   AddRGBAFormat(&map, GL_RGBA16I,           true, 16, 16, 16, 16, 0, GL_RGBA_INTEGER, GL_SHORT,                          GL_INT,                 false, RequireES<3, 0>,                                      NeverSupported,  RequireES<3, 0>,                                         RequireES<3, 0>,                                 NeverSupported);
   AddRGBAFormat(&map, GL_RGBA16UI,          true, 16, 16, 16, 16, 0, GL_RGBA_INTEGER, GL_UNSIGNED_SHORT,                 GL_UNSIGNED_INT,        false, RequireES<3, 0>,                                      NeverSupported,  RequireES<3, 0>,                                         RequireES<3, 0>,                                 NeverSupported);
   AddRGBAFormat(&map, GL_RGBA32I,           true, 32, 32, 32, 32, 0, GL_RGBA_INTEGER, GL_INT,                            GL_INT,                 false, RequireES<3, 0>,                                      NeverSupported,  RequireES<3, 0>,                                         RequireES<3, 0>,                                 NeverSupported);
   AddRGBAFormat(&map, GL_RGBA32UI,          true, 32, 32, 32, 32, 0, GL_RGBA_INTEGER, GL_UNSIGNED_INT,                   GL_UNSIGNED_INT,        false, RequireES<3, 0>,                                      NeverSupported,  RequireES<3, 0>,                                         RequireES<3, 0>,                                 NeverSupported);

   AddRGBAFormat(&map, GL_BGRA8_EXT,         true,  8,  8,  8,  8, 0, GL_BGRA_EXT,     GL_UNSIGNED_BYTE,                  GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureFormatBGRA8888EXT>,    AlwaysSupported, RequireExt<&Extensions::textureFormatBGRA8888EXT>,    RequireExt<&Extensions::textureFormatBGRA8888EXT>, RequireExt<&Extensions::textureFormatBGRA8888EXT>);
   AddRGBAFormat(&map, GL_BGRA4_ANGLEX,      true,  4,  4,  4,  4, 0, GL_BGRA_EXT,     GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT, GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureFormatBGRA8888EXT>,    AlwaysSupported, RequireExt<&Extensions::textureFormatBGRA8888EXT>,    RequireExt<&Extensions::textureFormatBGRA8888EXT>, RequireExt<&Extensions::textureFormatBGRA8888EXT>);
   AddRGBAFormat(&map, GL_BGR5_A1_ANGLEX,    true,  5,  5,  5,  1, 0, GL_BGRA_EXT,     GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT, GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureFormatBGRA8888EXT>,    AlwaysSupported, RequireExt<&Extensions::textureFormatBGRA8888EXT>,    RequireExt<&Extensions::textureFormatBGRA8888EXT>, RequireExt<&Extensions::textureFormatBGRA8888EXT>);

   // Special format that is used for D3D textures that are used within ANGLE via the
   // EGL_ANGLE_d3d_texture_client_buffer extension. We don't allow uploading texture images with
   // this format, but textures in this format can be created from D3D textures, and filtering them
   // and rendering to them is allowed.
   AddRGBAFormat(&map, GL_BGRA8_SRGB_ANGLEX, true,  8,  8,  8,  8, 0, GL_BGRA_EXT,     GL_UNSIGNED_BYTE,                  GL_UNSIGNED_NORMALIZED, true,  NeverSupported,                                    AlwaysSupported, AlwaysSupported,                                   AlwaysSupported,                               AlwaysSupported);

   // Special format which is not really supported, so always false for all supports.
   AddRGBAFormat(&map, GL_BGR565_ANGLEX,     true,  5,  6,  5,  0, 0, GL_BGRA_EXT,     GL_UNSIGNED_SHORT_5_6_5,           GL_UNSIGNED_NORMALIZED, false, NeverSupported,                                    NeverSupported,  NeverSupported,                                    NeverSupported,                                NeverSupported);
   AddRGBAFormat(&map, GL_BGR10_A2_ANGLEX,   true, 10, 10, 10,  2, 0, GL_BGRA_EXT,     GL_UNSIGNED_INT_2_10_10_10_REV,    GL_UNSIGNED_NORMALIZED, false, NeverSupported,                                    NeverSupported,  NeverSupported,                                    NeverSupported,                                NeverSupported);

   // Special format to emulate RGB8 with RGBA8 within ANGLE.
   AddRGBAFormat(&map, GL_RGBX8_ANGLE,      true,   8,  8,  8,  0, 0, GL_RGB,          GL_UNSIGNED_BYTE,                  GL_UNSIGNED_NORMALIZED, false, AlwaysSupported,                                   AlwaysSupported, AlwaysSupported,                                   AlwaysSupported,                               NeverSupported);

   // Special format to emulate BGR8 with BGRA8 within ANGLE.
   AddRGBAFormat(&map, GL_BGRX8_ANGLEX,      true,  8,  8,  8,  0, 0, GL_BGRA_EXT,     GL_UNSIGNED_BYTE,                  GL_UNSIGNED_NORMALIZED, false, NeverSupported,                                    AlwaysSupported,  NeverSupported,                                    NeverSupported,                                NeverSupported);

   // This format is supported on ES 2.0 with two extensions, so keep it out-of-line to not widen the table above even more.
   //                 | Internal format     |sized| R | G | B | A |S | Format         | Type                             | Component type        | SRGB | Texture supported                                                                            | Filterable     | Texture attachment                               | Renderbuffer                                   | Blend
   AddRGBAFormat(&map, GL_RGB10_A2,          true, 10, 10, 10,  2, 0, GL_RGBA,         GL_UNSIGNED_INT_2_10_10_10_REV,    GL_UNSIGNED_NORMALIZED, false, RequireESOrExtAndExt<3, 0, &Extensions::textureStorageEXT, &Extensions::textureType2101010REVEXT>,  AlwaysSupported, RequireES<3, 0>,                                   RequireES<3, 0>,                                 RequireES<3, 0>);

   // Floating point formats
   //                 | Internal format |sized| R | G | B | A |S | Format | Type             | Component type | SRGB | Texture supported         | Filterable                                    | Texture attachment                          | Renderbuffer                            | Blend
   // It's not possible to have two entries per sized format.
   // E.g. for GL_RG16F, one with GL_HALF_FLOAT type and the other with GL_HALF_FLOAT_OES type.
   // So, GL_HALF_FLOAT type formats conditions are merged with GL_HALF_FLOAT_OES type conditions.
   AddRGBAFormat(&map, GL_R16F,          true, 16,  0,  0,  0, 0, GL_RED,  GL_HALF_FLOAT,     GL_FLOAT,        false, SizedHalfFloatRGSupport,    SizedHalfFloatFilterSupport,                    SizedHalfFloatRGTextureAttachmentSupport,     SizedHalfFloatRGRenderbufferSupport,       SizedHalfFloatRGRenderbufferSupport);
   AddRGBAFormat(&map, GL_RG16F,         true, 16, 16,  0,  0, 0, GL_RG,   GL_HALF_FLOAT,     GL_FLOAT,        false, SizedHalfFloatRGSupport,    SizedHalfFloatFilterSupport,                    SizedHalfFloatRGTextureAttachmentSupport,     SizedHalfFloatRGRenderbufferSupport,       SizedHalfFloatRGRenderbufferSupport);
   AddRGBAFormat(&map, GL_RGB16F,        true, 16, 16, 16,  0, 0, GL_RGB,  GL_HALF_FLOAT,     GL_FLOAT,        false, SizedHalfFloatSupport,      SizedHalfFloatFilterSupport,                    SizedHalfFloatRGBTextureAttachmentSupport,    SizedHalfFloatRGBRenderbufferSupport,      SizedHalfFloatRGBRenderbufferSupport);
   AddRGBAFormat(&map, GL_RGBA16F,       true, 16, 16, 16, 16, 0, GL_RGBA, GL_HALF_FLOAT,     GL_FLOAT,        false, SizedHalfFloatSupport,      SizedHalfFloatFilterSupport,                    SizedHalfFloatRGBATextureAttachmentSupport,   SizedHalfFloatRGBARenderbufferSupport,     SizedHalfFloatRGBARenderbufferSupport);
   AddRGBAFormat(&map, GL_R32F,          true, 32,  0,  0,  0, 0, GL_RED,  GL_FLOAT,          GL_FLOAT,        false, SizedFloatRGSupport,        RequireExt<&Extensions::textureFloatLinearOES>, RequireExt<&Extensions::colorBufferFloatEXT>,    RequireExt<&Extensions::colorBufferFloatEXT>, Float32BlendableSupport);
   AddRGBAFormat(&map, GL_RG32F,         true, 32, 32,  0,  0, 0, GL_RG,   GL_FLOAT,          GL_FLOAT,        false, SizedFloatRGSupport,        RequireExt<&Extensions::textureFloatLinearOES>, RequireExt<&Extensions::colorBufferFloatEXT>,    RequireExt<&Extensions::colorBufferFloatEXT>, Float32BlendableSupport);
   AddRGBAFormat(&map, GL_RGB32F,        true, 32, 32, 32,  0, 0, GL_RGB,  GL_FLOAT,          GL_FLOAT,        false, SizedFloatRGBSupport,       RequireExt<&Extensions::textureFloatLinearOES>, RequireExt<&Extensions::colorBufferFloatRgbCHROMIUM>, NeverSupported,                            NeverSupported);
   AddRGBAFormat(&map, GL_RGBA32F,       true, 32, 32, 32, 32, 0, GL_RGBA, GL_FLOAT,          GL_FLOAT,        false, SizedFloatRGBASupport,      RequireExt<&Extensions::textureFloatLinearOES>, SizedFloatRGBARenderableSupport,              SizedFloatRGBARenderableSupport,           Float32BlendableSupport);

   // ANGLE Depth stencil formats
   //                         | Internal format         |sized| D |S | X | Format            | Type                             | Component type        | Texture supported                                                                            | Filterable                                                                             | Texture attachment                                                                           | Renderbuffer                                                                                              | Blend
   AddDepthStencilFormat(&map, GL_DEPTH_COMPONENT16,     true, 16, 0,  0, GL_DEPTH_COMPONENT, GL_UNSIGNED_SHORT,                 GL_UNSIGNED_NORMALIZED, RequireESOrExtOrExt<3, 0, &Extensions::depthTextureANGLE, &Extensions::depthTextureOES>,       RequireESOrExtOrExt<3, 0, &Extensions::depthTextureANGLE, &Extensions::depthTextureOES>, RequireES<1, 0>,                                                                               RequireES<1, 0>,                                                                                             RequireES<1, 0>);
   AddDepthStencilFormat(&map, GL_DEPTH_COMPONENT24,     true, 24, 0,  8, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT,                   GL_UNSIGNED_NORMALIZED, RequireES<3, 0>,                                                                               RequireESOrExt<3, 0, &Extensions::depthTextureANGLE>,                                    RequireES<3, 0>,                                                                               RequireESOrExt<3, 0, &Extensions::depth24OES>,                                                               RequireESOrExt<3, 0, &Extensions::depth24OES>);
   AddDepthStencilFormat(&map, GL_DEPTH_COMPONENT32F,    true, 32, 0,  0, GL_DEPTH_COMPONENT, GL_FLOAT,                          GL_FLOAT,               RequireES<3, 0>,                                                                               RequireESOrExt<3, 0, &Extensions::depthTextureANGLE>,                                    RequireES<3, 0>,                                                                               RequireES<3, 0>,                                                                                             RequireES<3, 0>);
   AddDepthStencilFormat(&map, GL_DEPTH_COMPONENT32_OES, true, 32, 0,  0, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT,                   GL_UNSIGNED_NORMALIZED, RequireExtOrExt<&Extensions::depthTextureANGLE, &Extensions::depthTextureOES>,                 AlwaysSupported,                                                                         RequireExtOrExt<&Extensions::depthTextureANGLE, &Extensions::depthTextureOES>,                 RequireExtOrExtOrExt<&Extensions::depthTextureANGLE, &Extensions::depthTextureOES, &Extensions::depth32OES>, RequireExtOrExtOrExt<&Extensions::depthTextureANGLE, &Extensions::depthTextureOES, &Extensions::depth32OES>);
   AddDepthStencilFormat(&map, GL_DEPTH24_STENCIL8,      true, 24, 8,  0, GL_DEPTH_STENCIL,   GL_UNSIGNED_INT_24_8,              GL_UNSIGNED_NORMALIZED, RequireESOrExtOrExt<3, 0, &Extensions::depthTextureANGLE, &Extensions::packedDepthStencilOES>, AlwaysSupported,                                                                         RequireESOrExtOrExt<3, 0, &Extensions::depthTextureANGLE, &Extensions::packedDepthStencilOES>, RequireESOrExtOrExt<3, 0, &Extensions::depthTextureANGLE, &Extensions::packedDepthStencilOES>,               RequireESOrExtOrExt<3, 0, &Extensions::depthTextureANGLE, &Extensions::packedDepthStencilOES>);
   AddDepthStencilFormat(&map, GL_DEPTH32F_STENCIL8,     true, 32, 8, 24, GL_DEPTH_STENCIL,   GL_FLOAT_32_UNSIGNED_INT_24_8_REV, GL_FLOAT,               RequireESOrExt<3, 0, &Extensions::depthBufferFloat2NV>,                                        AlwaysSupported,                                                                         RequireESOrExt<3, 0, &Extensions::depthBufferFloat2NV>,                                        RequireESOrExt<3, 0, &Extensions::depthBufferFloat2NV>,                                                      RequireESOrExt<3, 0, &Extensions::depthBufferFloat2NV>);
   // STENCIL_INDEX8 is special-cased, see around the bottom of the list.

   // Luminance alpha formats
   //                | Internal format           |sized| L | A | Format            | Type             | Component type        | Texture supported                                                           | Filterable                                     | Texture attachment | Renderbuffer | Blend
   AddLUMAFormat(&map, GL_ALPHA8_EXT,             true,  0,  8, GL_ALPHA,           GL_UNSIGNED_BYTE,  GL_UNSIGNED_NORMALIZED, RequireExt<&Extensions::textureStorageEXT>,                                      AlwaysSupported,                                 NeverSupported,      NeverSupported, NeverSupported);
   AddLUMAFormat(&map, GL_LUMINANCE8_EXT,         true,  8,  0, GL_LUMINANCE,       GL_UNSIGNED_BYTE,  GL_UNSIGNED_NORMALIZED, RequireExt<&Extensions::textureStorageEXT>,                                      AlwaysSupported,                                 NeverSupported,      NeverSupported, NeverSupported);
   AddLUMAFormat(&map, GL_LUMINANCE8_ALPHA8_EXT,  true,  8,  8, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE,  GL_UNSIGNED_NORMALIZED, RequireExt<&Extensions::textureStorageEXT>,                                      AlwaysSupported,                                 NeverSupported,      NeverSupported, NeverSupported);
   AddLUMAFormat(&map, GL_ALPHA16F_EXT,           true,  0, 16, GL_ALPHA,           GL_HALF_FLOAT_OES, GL_FLOAT,               RequireExtAndExt<&Extensions::textureStorageEXT, &Extensions::textureHalfFloatOES>, RequireExt<&Extensions::textureHalfFloatLinearOES>, NeverSupported,      NeverSupported, NeverSupported);
   AddLUMAFormat(&map, GL_LUMINANCE16F_EXT,       true, 16,  0, GL_LUMINANCE,       GL_HALF_FLOAT_OES, GL_FLOAT,               RequireExtAndExt<&Extensions::textureStorageEXT, &Extensions::textureHalfFloatOES>, RequireExt<&Extensions::textureHalfFloatLinearOES>, NeverSupported,      NeverSupported, NeverSupported);
   AddLUMAFormat(&map, GL_LUMINANCE_ALPHA16F_EXT, true, 16, 16, GL_LUMINANCE_ALPHA, GL_HALF_FLOAT_OES, GL_FLOAT,               RequireExtAndExt<&Extensions::textureStorageEXT, &Extensions::textureHalfFloatOES>, RequireExt<&Extensions::textureHalfFloatLinearOES>, NeverSupported,      NeverSupported, NeverSupported);
   AddLUMAFormat(&map, GL_ALPHA32F_EXT,           true,  0, 32, GL_ALPHA,           GL_FLOAT,          GL_FLOAT,               RequireExtAndExt<&Extensions::textureStorageEXT, &Extensions::textureFloatOES>,  RequireExt<&Extensions::textureFloatLinearOES>,  NeverSupported,      NeverSupported, NeverSupported);
   AddLUMAFormat(&map, GL_LUMINANCE32F_EXT,       true, 32,  0, GL_LUMINANCE,       GL_FLOAT,          GL_FLOAT,               RequireExtAndExt<&Extensions::textureStorageEXT, &Extensions::textureFloatOES>,  RequireExt<&Extensions::textureFloatLinearOES>,  NeverSupported,      NeverSupported, NeverSupported);
   AddLUMAFormat(&map, GL_LUMINANCE_ALPHA32F_EXT, true, 32, 32, GL_LUMINANCE_ALPHA, GL_FLOAT,          GL_FLOAT,               RequireExtAndExt<&Extensions::textureStorageEXT, &Extensions::textureFloatOES>,  RequireExt<&Extensions::textureFloatLinearOES>,  NeverSupported,      NeverSupported, NeverSupported);

   // Compressed formats, From ES 3.0.1 spec, table 3.16
   //                       | Internal format                             |W |H |D | BS |CC| SRGB | Texture supported                                                          | Filterable     | Texture attachment | Renderbuffer  | Blend
   AddCompressedFormat(&map, GL_COMPRESSED_R11_EAC,                        4, 4, 1,  64, 1, false, ETC2EACSupport<&Extensions::compressedEACR11UnsignedTextureOES>,              AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SIGNED_R11_EAC,                 4, 4, 1,  64, 1, false, ETC2EACSupport<&Extensions::compressedEACR11SignedTextureOES>,                AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RG11_EAC,                       4, 4, 1, 128, 2, false, ETC2EACSupport<&Extensions::compressedEACRG11UnsignedTextureOES>,             AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SIGNED_RG11_EAC,                4, 4, 1, 128, 2, false, ETC2EACSupport<&Extensions::compressedEACRG11SignedTextureOES>,               AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGB8_ETC2,                      4, 4, 1,  64, 3, false, ETC2EACSupport<&Extensions::compressedETC2RGB8TextureOES>,                    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ETC2,                     4, 4, 1,  64, 3, true,  ETC2EACSupport<&Extensions::compressedETC2SRGB8TextureOES>,                   AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2,  4, 4, 1,  64, 4, false, ETC2EACSupport<&Extensions::compressedETC2PunchthroughARGBA8TextureOES>,      AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2, 4, 4, 1,  64, 4, true,  ETC2EACSupport<&Extensions::compressedETC2PunchthroughASRGB8AlphaTextureOES>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA8_ETC2_EAC,                 4, 4, 1, 128, 4, false, ETC2EACSupport<&Extensions::compressedETC2RGBA8TextureOES>,                   AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC,          4, 4, 1, 128, 4, true,  ETC2EACSupport<&Extensions::compressedETC2SRGB8Alpha8TextureOES>,             AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

   // From GL_EXT_texture_compression_dxt1
   //                       | Internal format                   |W |H |D | BS |CC| SRGB | Texture supported                                    | Filterable     | Texture attachment | Renderbuffer  | Blend
   AddCompressedFormat(&map, GL_COMPRESSED_RGB_S3TC_DXT1_EXT,    4, 4, 1,  64, 3, false, RequireExt<&Extensions::textureCompressionDxt1EXT>,       AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_S3TC_DXT1_EXT,   4, 4, 1,  64, 4, false, RequireExt<&Extensions::textureCompressionDxt1EXT>,       AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

   // From GL_ANGLE_texture_compression_dxt3
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE, 4, 4, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionDxt3ANGLE>,       AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

   // From GL_ANGLE_texture_compression_dxt5
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE, 4, 4, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionDxt5ANGLE>,       AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

   // From GL_OES_compressed_ETC1_RGB8_texture
   AddCompressedFormat(&map, GL_ETC1_RGB8_OES,                   4, 4, 1,  64, 3, false, RequireExt<&Extensions::compressedETC1RGB8TextureOES>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

   // From GL_EXT_texture_compression_s3tc_srgb
   //                       | Internal format                       |W |H |D | BS |CC|SRGB | Texture supported                                 | Filterable     | Texture attachment | Renderbuffer  | Blend
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB_S3TC_DXT1_EXT,       4, 4, 1,  64, 3, true, RequireExt<&Extensions::textureCompressionS3tcSrgbEXT>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT, 4, 4, 1,  64, 4, true, RequireExt<&Extensions::textureCompressionS3tcSrgbEXT>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT, 4, 4, 1, 128, 4, true, RequireExt<&Extensions::textureCompressionS3tcSrgbEXT>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT, 4, 4, 1, 128, 4, true, RequireExt<&Extensions::textureCompressionS3tcSrgbEXT>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

   // From GL_KHR_texture_compression_astc_ldr and KHR_texture_compression_astc_hdr and GL_OES_texture_compression_astc
   //                       | Internal format                          | W | H |D | BS |CC| SRGB | Texture supported                                    | Filterable     | Texture attachment | Renderbuffer  | Blend
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_4x4_KHR,            4,  4, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_5x4_KHR,            5,  4, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_5x5_KHR,            5,  5, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_6x5_KHR,            6,  5, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_6x6_KHR,            6,  6, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_8x5_KHR,            8,  5, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_8x6_KHR,            8,  6, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_8x8_KHR,            8,  8, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_10x5_KHR,          10,  5, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_10x6_KHR,          10,  6, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_10x8_KHR,          10,  8, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_10x10_KHR,         10, 10, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_12x10_KHR,         12, 10, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_12x12_KHR,         12, 12, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR,    4,  4, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR,    5,  4, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR,    5,  5, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR,    6,  5, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR,    6,  6, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR,    8,  5, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR,    8,  6, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR,    8,  8, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR,  10,  5, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR,  10,  6, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR,  10,  8, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR, 10, 10, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR, 12, 10, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR, 12, 12, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionAstcLdrKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_3x3x3_OES,          3,  3, 3, 128, 4, false, RequireExt<&Extensions::textureCompressionAstcOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_4x3x3_OES,          4,  3, 3, 128, 4, false, RequireExt<&Extensions::textureCompressionAstcOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_4x4x3_OES,          4,  4, 3, 128, 4, false, RequireExt<&Extensions::textureCompressionAstcOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_4x4x4_OES,          4,  4, 4, 128, 4, false, RequireExt<&Extensions::textureCompressionAstcOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_5x4x4_OES,          5,  4, 4, 128, 4, false, RequireExt<&Extensions::textureCompressionAstcOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_5x5x4_OES,          5,  5, 4, 128, 4, false, RequireExt<&Extensions::textureCompressionAstcOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_5x5x5_OES,          5,  5, 5, 128, 4, false, RequireExt<&Extensions::textureCompressionAstcOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_6x5x5_OES,          6,  5, 5, 128, 4, false, RequireExt<&Extensions::textureCompressionAstcOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_6x6x5_OES,          6,  6, 5, 128, 4, false, RequireExt<&Extensions::textureCompressionAstcOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_6x6x6_OES,          6,  6, 6, 128, 4, false, RequireExt<&Extensions::textureCompressionAstcOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_3x3x3_OES,  3,  3, 3, 128, 4, true,  RequireExt<&Extensions::textureCompressionAstcOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x3x3_OES,  4,  3, 3, 128, 4, true,  RequireExt<&Extensions::textureCompressionAstcOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x3_OES,  4,  4, 3, 128, 4, true,  RequireExt<&Extensions::textureCompressionAstcOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x4_OES,  4,  4, 4, 128, 4, true,  RequireExt<&Extensions::textureCompressionAstcOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4x4_OES,  5,  4, 4, 128, 4, true,  RequireExt<&Extensions::textureCompressionAstcOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x4_OES,  5,  5, 4, 128, 4, true,  RequireExt<&Extensions::textureCompressionAstcOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x5_OES,  5,  5, 5, 128, 4, true,  RequireExt<&Extensions::textureCompressionAstcOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5x5_OES,  6,  5, 5, 128, 4, true,  RequireExt<&Extensions::textureCompressionAstcOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x5_OES,  6,  6, 5, 128, 4, true,  RequireExt<&Extensions::textureCompressionAstcOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x6_OES,  6,  6, 6, 128, 4, true,  RequireExt<&Extensions::textureCompressionAstcOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

   // From EXT_texture_compression_rgtc
   //                       | Internal format                        | W | H |D | BS |CC| SRGB | Texture supported                              | Filterable     | Texture attachment | Renderbuffer  | Blend
   AddCompressedFormat(&map, GL_COMPRESSED_RED_RGTC1_EXT,              4,  4, 1,  64, 1, false, RequireExt<&Extensions::textureCompressionRgtcEXT>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SIGNED_RED_RGTC1_EXT,       4,  4, 1,  64, 1, false, RequireExt<&Extensions::textureCompressionRgtcEXT>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RED_GREEN_RGTC2_EXT,        4,  4, 1, 128, 2, false, RequireExt<&Extensions::textureCompressionRgtcEXT>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT, 4,  4, 1, 128, 2, false, RequireExt<&Extensions::textureCompressionRgtcEXT>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

   // From EXT_texture_compression_bptc
   //                       | Internal format                         | W | H |D | BS |CC| SRGB | Texture supported                              | Filterable     | Texture attachment | Renderbuffer  | Blend
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_BPTC_UNORM_EXT,         4,  4, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionBptcEXT>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM_EXT,   4,  4, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionBptcEXT>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT_EXT,   4,  4, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionBptcEXT>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT_EXT, 4,  4, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionBptcEXT>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

   // Paletted formats
   //                      | Internal format       |    | PS | Format | CC | Texture supported | Filterable     | Texture attachment | Renderbuffer  | Blend
   AddPalettedFormat(&map, GL_PALETTE4_RGB8_OES,      4,   3, GL_RGB,    3, RequireES1,         AlwaysSupported, NeverSupported,     NeverSupported, NeverSupported);
   AddPalettedFormat(&map, GL_PALETTE4_RGBA8_OES,     4,   4, GL_RGBA,   4, RequireES1,         AlwaysSupported, NeverSupported,     NeverSupported, NeverSupported);
   AddPalettedFormat(&map, GL_PALETTE4_R5_G6_B5_OES,  4,   2, GL_RGB,    3, RequireES1,         AlwaysSupported, NeverSupported,     NeverSupported, NeverSupported);
   AddPalettedFormat(&map, GL_PALETTE4_RGBA4_OES,     4,   2, GL_RGBA,   4, RequireES1,         AlwaysSupported, NeverSupported,     NeverSupported, NeverSupported);
   AddPalettedFormat(&map, GL_PALETTE4_RGB5_A1_OES,   4,   2, GL_RGBA,   4, RequireES1,         AlwaysSupported, NeverSupported,     NeverSupported, NeverSupported);
   AddPalettedFormat(&map, GL_PALETTE8_RGB8_OES,      8,   3, GL_RGB,    3, RequireES1,         AlwaysSupported, NeverSupported,     NeverSupported, NeverSupported);
   AddPalettedFormat(&map, GL_PALETTE8_RGBA8_OES,     8,   4, GL_RGBA,   4, RequireES1,         AlwaysSupported, NeverSupported,     NeverSupported, NeverSupported);
   AddPalettedFormat(&map, GL_PALETTE8_R5_G6_B5_OES,  8,   2, GL_RGB,    3, RequireES1,         AlwaysSupported, NeverSupported,     NeverSupported, NeverSupported);
   AddPalettedFormat(&map, GL_PALETTE8_RGBA4_OES,     8,   2, GL_RGBA,   4, RequireES1,         AlwaysSupported, NeverSupported,     NeverSupported, NeverSupported);
   AddPalettedFormat(&map, GL_PALETTE8_RGB5_A1_OES,   8,   2, GL_RGBA,   4, RequireES1,         AlwaysSupported, NeverSupported,     NeverSupported, NeverSupported);

   // From GL_IMG_texture_compression_pvrtc
   //                       | Internal format                       | W | H | D | BS |CC| SRGB | Texture supported                                 | Filterable     | Texture attachment | Renderbuffer  | Blend
   AddCompressedFormat(&map, GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG,      4,  4,  1,  64,  3, false, RequireExt<&Extensions::textureCompressionPvrtcIMG>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG,      8,  4,  1,  64,  3, false, RequireExt<&Extensions::textureCompressionPvrtcIMG>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG,     4,  4,  1,  64,  4, false, RequireExt<&Extensions::textureCompressionPvrtcIMG>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG,     8,  4,  1,  64,  4, false, RequireExt<&Extensions::textureCompressionPvrtcIMG>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

   // From GL_EXT_pvrtc_sRGB
   //                       | Internal format                             | W | H | D | BS |CC| SRGB | Texture supported                                                                               | Filterable     | Texture attachment | Renderbuffer  | Blend
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB_PVRTC_2BPPV1_EXT,           8,  4,  1,  64,  3, true, RequireExtAndExt<&Extensions::textureCompressionPvrtcIMG, &Extensions::pvrtcSRGBEXT>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB_PVRTC_4BPPV1_EXT,           4,  4,  1,  64,  3, true, RequireExtAndExt<&Extensions::textureCompressionPvrtcIMG, &Extensions::pvrtcSRGBEXT>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB_ALPHA_PVRTC_2BPPV1_EXT,     8,  4,  1,  64,  4, true, RequireExtAndExt<&Extensions::textureCompressionPvrtcIMG, &Extensions::pvrtcSRGBEXT>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB_ALPHA_PVRTC_4BPPV1_EXT,     4,  4,  1,  64,  4, true, RequireExtAndExt<&Extensions::textureCompressionPvrtcIMG, &Extensions::pvrtcSRGBEXT>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

   // For STENCIL_INDEX8 we chose a normalized component type for the following reasons:
   // - Multisampled buffer are disallowed for non-normalized integer component types and we want to support it for STENCIL_INDEX8
   // - All other stencil formats (all depth-stencil) are either float or normalized
   // - It affects only validation of internalformat in RenderbufferStorageMultisample.
   //                         | Internal format  |sized|D |S |X | Format          | Type            | Component type        | Texture supported                               | Filterable    | Texture attachment                              | Renderbuffer   | Blend
   AddDepthStencilFormat(&map, GL_STENCIL_INDEX8, true, 0, 8, 0, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, RequireESOrExt<1, 0, &Extensions::textureStencil8OES>, NeverSupported, RequireESOrExt<1, 0, &Extensions::textureStencil8OES>, RequireES<1, 0>, RequireES<1, 0>);

   // From GL_ANGLE_lossy_etc_decode
   //                       | Internal format                                                |W |H |D |BS |CC| SRGB | Texture supported                      | Filterable     | Texture attachment | Renderbuffer  | Blend
   AddCompressedFormat(&map, GL_ETC1_RGB8_LOSSY_DECODE_ANGLE,                                 4, 4, 1, 64, 3, false, RequireExt<&Extensions::lossyEtcDecodeANGLE>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGB8_LOSSY_DECODE_ETC2_ANGLE,                      4, 4, 1, 64, 3, false, RequireExt<&Extensions::lossyEtcDecodeANGLE>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_LOSSY_DECODE_ETC2_ANGLE,                     4, 4, 1, 64, 3, true,  RequireExt<&Extensions::lossyEtcDecodeANGLE>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_LOSSY_DECODE_ETC2_ANGLE,  4, 4, 1, 64, 3, false, RequireExt<&Extensions::lossyEtcDecodeANGLE>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_LOSSY_DECODE_ETC2_ANGLE, 4, 4, 1, 64, 3, true,  RequireExt<&Extensions::lossyEtcDecodeANGLE>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

   // From GL_EXT_texture_norm16
   //                 | Internal format    |sized| R | G | B | A |S | Format | Type             | Component type        | SRGB | Texture supported                     | Filterable     | Texture attachment                    | Renderbuffer                          | Blend
   AddRGBAFormat(&map, GL_R16_EXT,          true, 16,  0,  0,  0, 0, GL_RED,  GL_UNSIGNED_SHORT, GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureNorm16EXT>, AlwaysSupported, RequireExt<&Extensions::textureNorm16EXT>, RequireExt<&Extensions::textureNorm16EXT>, RequireExt<&Extensions::textureNorm16EXT>);
   AddRGBAFormat(&map, GL_R16_SNORM_EXT,    true, 16,  0,  0,  0, 0, GL_RED,  GL_SHORT,          GL_SIGNED_NORMALIZED,   false, RequireExt<&Extensions::textureNorm16EXT>, AlwaysSupported, NeverSupported,                         NeverSupported,                         NeverSupported);
   AddRGBAFormat(&map, GL_RG16_EXT,         true, 16, 16,  0,  0, 0, GL_RG,   GL_UNSIGNED_SHORT, GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureNorm16EXT>, AlwaysSupported, RequireExt<&Extensions::textureNorm16EXT>, RequireExt<&Extensions::textureNorm16EXT>, RequireExt<&Extensions::textureNorm16EXT>);
   AddRGBAFormat(&map, GL_RG16_SNORM_EXT,   true, 16, 16,  0,  0, 0, GL_RG,   GL_SHORT,          GL_SIGNED_NORMALIZED,   false, RequireExt<&Extensions::textureNorm16EXT>, AlwaysSupported, NeverSupported,                         NeverSupported,                         NeverSupported);
   AddRGBAFormat(&map, GL_RGB16_EXT,        true, 16, 16, 16,  0, 0, GL_RGB,  GL_UNSIGNED_SHORT, GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureNorm16EXT>, AlwaysSupported, NeverSupported,                         NeverSupported,                         NeverSupported);
   AddRGBAFormat(&map, GL_RGB16_SNORM_EXT,  true, 16, 16, 16,  0, 0, GL_RGB,  GL_SHORT,          GL_SIGNED_NORMALIZED,   false, RequireExt<&Extensions::textureNorm16EXT>, AlwaysSupported, NeverSupported,                         NeverSupported,                         NeverSupported);
   AddRGBAFormat(&map, GL_RGBA16_EXT,       true, 16, 16, 16, 16, 0, GL_RGBA, GL_UNSIGNED_SHORT, GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureNorm16EXT>, AlwaysSupported, RequireExt<&Extensions::textureNorm16EXT>, RequireExt<&Extensions::textureNorm16EXT>, RequireExt<&Extensions::textureNorm16EXT>);
   AddRGBAFormat(&map, GL_RGBA16_SNORM_EXT, true, 16, 16, 16, 16, 0, GL_RGBA, GL_SHORT,          GL_SIGNED_NORMALIZED,   false, RequireExt<&Extensions::textureNorm16EXT>, AlwaysSupported, NeverSupported,                         NeverSupported,                         NeverSupported);

   // From EXT_texture_sRGB_R8
   //                 | Internal format    |sized| R | G | B | A |S | Format | Type             | Component type        | SRGB | Texture supported                     | Filterable     | Texture attachment                    | Renderbuffer                          | Blend
   AddRGBAFormat(&map, GL_SR8_EXT,          true,  8,  0,  0,  0, 0, GL_RED,  GL_UNSIGNED_BYTE,  GL_UNSIGNED_NORMALIZED, true,  RequireExt<&Extensions::textureSRGBR8EXT>,     AlwaysSupported, NeverSupported,                         NeverSupported,                         NeverSupported);

   // From EXT_texture_sRGB_RG8
   //                 | Internal format    |sized| R | G | B | A |S | Format | Type             | Component type        | SRGB | Texture supported                     | Filterable     | Texture attachment                    | Renderbuffer                          | Blend
   AddRGBAFormat(&map, GL_SRG8_EXT,         true,  8,  8,  0,  0, 0, GL_RG,   GL_UNSIGNED_BYTE,  GL_UNSIGNED_NORMALIZED, true,  RequireExt<&Extensions::textureSRGBRG8EXT>,    AlwaysSupported, NeverSupported,                         NeverSupported,                         NeverSupported);

   // From GL_EXT_texture_type_2_10_10_10_REV
   // GL_RGB10_UNORM_ANGLEX is never used directly but needs to be in the list of all sized internal formats so that the backends can determine support.
   //                  | Internal format      |sized|    R | G | B | A |S |X   | Format           | Type                          | Component type        | SRGB | Texture supported                                  | Filterable     | Texture attachment                               | Renderbuffer  | Blend
   AddRGBAXFormat(&map, GL_RGB10_UNORM_ANGLEX, true, FB<10, 10, 10,  0, 0, 2>(), GL_RGB,            GL_UNSIGNED_INT_2_10_10_10_REV, GL_UNSIGNED_NORMALIZED, false, NeverSupported,                                     NeverSupported,  NeverSupported,                                    NeverSupported, NeverSupported);

   // Unsized formats
   //                  | Internal format  |sized |    R | G | B | A |S |X   | Format           | Type                          | Component type        | SRGB | Texture supported                                  | Filterable     | Texture attachment                               | Renderbuffer  | Blend
   AddRGBAXFormat(&map, GL_RED,            false, FB< 8,  0,  0,  0, 0, 0>(), GL_RED,            GL_UNSIGNED_BYTE,               GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureRgEXT>,               AlwaysSupported, RequireExt<&Extensions::textureRgEXT>,             NeverSupported, NeverSupported);
   AddRGBAXFormat(&map, GL_RED,            false, FB< 8,  0,  0,  0, 0, 0>(), GL_RED,            GL_BYTE,                        GL_SIGNED_NORMALIZED,   false, NeverSupported,                                      NeverSupported,  NeverSupported,                                    NeverSupported, NeverSupported);
   AddRGBAXFormat(&map, GL_RED,            false, FB<16,  0,  0,  0, 0, 0>(), GL_RED,            GL_UNSIGNED_SHORT,              GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureNorm16EXT>,           AlwaysSupported, RequireExt<&Extensions::textureNorm16EXT>,         NeverSupported, NeverSupported);
   AddRGBAXFormat(&map, GL_RG,             false, FB< 8,  8,  0,  0, 0, 0>(), GL_RG,             GL_UNSIGNED_BYTE,               GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureRgEXT>,               AlwaysSupported, RequireExt<&Extensions::textureRgEXT>,             NeverSupported, NeverSupported);
   AddRGBAXFormat(&map, GL_RG,             false, FB< 8,  8,  0,  0, 0, 0>(), GL_RG,             GL_BYTE,                        GL_SIGNED_NORMALIZED,   false, NeverSupported,                                      NeverSupported,  NeverSupported,                                    NeverSupported, NeverSupported);
   AddRGBAXFormat(&map, GL_RG,             false, FB<16, 16,  0,  0, 0, 0>(), GL_RG,             GL_UNSIGNED_SHORT,              GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureNorm16EXT>,           AlwaysSupported, RequireExt<&Extensions::textureNorm16EXT>,         NeverSupported, NeverSupported);
   AddRGBAXFormat(&map, GL_RGB,            false, FB< 8,  8,  8,  0, 0, 0>(), GL_RGB,            GL_UNSIGNED_BYTE,               GL_UNSIGNED_NORMALIZED, false, AlwaysSupported,                                     AlwaysSupported, RequireESOrExt<2, 0, &Extensions::framebufferObjectOES>,                                NeverSupported, NeverSupported);
   AddRGBAXFormat(&map, GL_RGB,            false, FB< 5,  6,  5,  0, 0, 0>(), GL_RGB,            GL_UNSIGNED_SHORT_5_6_5,        GL_UNSIGNED_NORMALIZED, false, AlwaysSupported,                                     AlwaysSupported, RequireESOrExt<2, 0, &Extensions::framebufferObjectOES>,                                NeverSupported, NeverSupported);
   AddRGBAXFormat(&map, GL_RGB,            false, FB< 8,  8,  8,  0, 0, 0>(), GL_RGB,            GL_BYTE,                        GL_SIGNED_NORMALIZED,   false, NeverSupported,                                      NeverSupported,  NeverSupported,                                    NeverSupported, NeverSupported);
   AddRGBAXFormat(&map, GL_RGB,            false, FB<10, 10, 10,  0, 0, 2>(), GL_RGB,            GL_UNSIGNED_INT_2_10_10_10_REV, GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureType2101010REVEXT>, AlwaysSupported, NeverSupported,                                    NeverSupported, NeverSupported);
   AddRGBAXFormat(&map, GL_RGBA,           false, FB< 4,  4,  4,  4, 0, 0>(), GL_RGBA,           GL_UNSIGNED_SHORT_4_4_4_4,      GL_UNSIGNED_NORMALIZED, false, AlwaysSupported,                                     AlwaysSupported, RequireESOrExt<2, 0, &Extensions::framebufferObjectOES>,                                NeverSupported, NeverSupported);
   AddRGBAXFormat(&map, GL_RGBA,           false, FB< 5,  5,  5,  1, 0, 0>(), GL_RGBA,           GL_UNSIGNED_SHORT_5_5_5_1,      GL_UNSIGNED_NORMALIZED, false, AlwaysSupported,                                     AlwaysSupported, RequireESOrExt<2, 0, &Extensions::framebufferObjectOES>,                                NeverSupported, NeverSupported);
   AddRGBAXFormat(&map, GL_RGBA,           false, FB< 8,  8,  8,  8, 0, 0>(), GL_RGBA,           GL_UNSIGNED_BYTE,               GL_UNSIGNED_NORMALIZED, false, AlwaysSupported,                                     AlwaysSupported, RequireESOrExt<2, 0, &Extensions::framebufferObjectOES>,                                NeverSupported, NeverSupported);
   AddRGBAXFormat(&map, GL_RGBA,           false, FB<16, 16, 16, 16, 0, 0>(), GL_RGBA,           GL_UNSIGNED_SHORT,              GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureNorm16EXT>,           AlwaysSupported, RequireExt<&Extensions::textureNorm16EXT>,         NeverSupported, NeverSupported);
   AddRGBAXFormat(&map, GL_RGBA,           false, FB<10, 10, 10,  2, 0, 0>(), GL_RGBA,           GL_UNSIGNED_INT_2_10_10_10_REV, GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureType2101010REVEXT>, AlwaysSupported, NeverSupported,                                    NeverSupported, NeverSupported);
   AddRGBAXFormat(&map, GL_RGBA,           false, FB< 8,  8,  8,  8, 0, 0>(), GL_RGBA,           GL_BYTE,                        GL_SIGNED_NORMALIZED,   false, NeverSupported,                                      NeverSupported,  NeverSupported,                                    NeverSupported, NeverSupported);
   AddRGBAXFormat(&map, GL_SRGB,           false, FB< 8,  8,  8,  0, 0, 0>(), GL_SRGB,           GL_UNSIGNED_BYTE,               GL_UNSIGNED_NORMALIZED, true,  RequireExt<&Extensions::sRGBEXT>,                    AlwaysSupported, NeverSupported,                                    NeverSupported, NeverSupported);
   AddRGBAXFormat(&map, GL_SRGB_ALPHA_EXT, false, FB< 8,  8,  8,  8, 0, 0>(), GL_SRGB_ALPHA_EXT, GL_UNSIGNED_BYTE,               GL_UNSIGNED_NORMALIZED, true,  RequireExt<&Extensions::sRGBEXT>,                    AlwaysSupported, RequireExt<&Extensions::sRGBEXT>,                  NeverSupported, NeverSupported);
#if (defined(ANGLE_PLATFORM_IOS) && !defined(ANGLE_PLATFORM_MACCATALYST)) || (defined(ANGLE_PLATFORM_MACCATALYST) && defined(ANGLE_CPU_ARM64))
   angle::SystemInfo info;
   if (angle::GetSystemInfo(&info))
   {
       if (info.needsEAGLOnMac)
       {
           // Using OpenGLES.framework.
           AddRGBAFormat(&map, GL_BGRA_EXT,       false,  8,  8,  8,  8, 0, GL_BGRA_EXT,       GL_UNSIGNED_BYTE,               GL_UNSIGNED_NORMALIZED, false, RequireES<2, 0>,                                  AlwaysSupported, RequireES<2, 0>,                                NeverSupported, NeverSupported);
       }
       else
       {
           // Using OpenGL.framework.
           AddRGBAFormat(&map, GL_BGRA_EXT,       false,  8,  8,  8,  8, 0, GL_BGRA_EXT,       GL_UNSIGNED_BYTE,               GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureFormatBGRA8888EXT>,   AlwaysSupported, RequireExt<&Extensions::textureFormatBGRA8888EXT>, NeverSupported, NeverSupported);
       }
   }
#else
   AddRGBAFormat(&map, GL_BGRA_EXT,       false,  8,  8,  8,  8, 0, GL_BGRA_EXT,       GL_UNSIGNED_BYTE,               GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureFormatBGRA8888EXT>,   AlwaysSupported, RequireExt<&Extensions::textureFormatBGRA8888EXT>, NeverSupported, NeverSupported);
#endif

   // Unsized integer formats
   //                 |Internal format |sized | R | G | B | A |S | Format         | Type                          | Component type | SRGB | Texture supported | Filterable    | Texture attachment | Renderbuffer  | Blend
   AddRGBAFormat(&map, GL_RED_INTEGER,  false,  8,  0,  0,  0, 0, GL_RED_INTEGER,  GL_BYTE,                        GL_INT,          false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RED_INTEGER,  false,  8,  0,  0,  0, 0, GL_RED_INTEGER,  GL_UNSIGNED_BYTE,               GL_UNSIGNED_INT, false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RED_INTEGER,  false, 16,  0,  0,  0, 0, GL_RED_INTEGER,  GL_SHORT,                       GL_INT,          false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RED_INTEGER,  false, 16,  0,  0,  0, 0, GL_RED_INTEGER,  GL_UNSIGNED_SHORT,              GL_UNSIGNED_INT, false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RED_INTEGER,  false, 32,  0,  0,  0, 0, GL_RED_INTEGER,  GL_INT,                         GL_INT,          false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RED_INTEGER,  false, 32,  0,  0,  0, 0, GL_RED_INTEGER,  GL_UNSIGNED_INT,                GL_UNSIGNED_INT, false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RG_INTEGER,   false,  8,  8,  0,  0, 0, GL_RG_INTEGER,   GL_BYTE,                        GL_INT,          false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RG_INTEGER,   false,  8,  8,  0,  0, 0, GL_RG_INTEGER,   GL_UNSIGNED_BYTE,               GL_UNSIGNED_INT, false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RG_INTEGER,   false, 16, 16,  0,  0, 0, GL_RG_INTEGER,   GL_SHORT,                       GL_INT,          false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RG_INTEGER,   false, 16, 16,  0,  0, 0, GL_RG_INTEGER,   GL_UNSIGNED_SHORT,              GL_UNSIGNED_INT, false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RG_INTEGER,   false, 32, 32,  0,  0, 0, GL_RG_INTEGER,   GL_INT,                         GL_INT,          false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RG_INTEGER,   false, 32, 32,  0,  0, 0, GL_RG_INTEGER,   GL_UNSIGNED_INT,                GL_UNSIGNED_INT, false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RGB_INTEGER,  false,  8,  8,  8,  0, 0, GL_RGB_INTEGER,  GL_BYTE,                        GL_INT,          false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RGB_INTEGER,  false,  8,  8,  8,  0, 0, GL_RGB_INTEGER,  GL_UNSIGNED_BYTE,               GL_UNSIGNED_INT, false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RGB_INTEGER,  false, 16, 16, 16,  0, 0, GL_RGB_INTEGER,  GL_SHORT,                       GL_INT,          false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RGB_INTEGER,  false, 16, 16, 16,  0, 0, GL_RGB_INTEGER,  GL_UNSIGNED_SHORT,              GL_UNSIGNED_INT, false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RGB_INTEGER,  false, 32, 32, 32,  0, 0, GL_RGB_INTEGER,  GL_INT,                         GL_INT,          false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RGB_INTEGER,  false, 32, 32, 32,  0, 0, GL_RGB_INTEGER,  GL_UNSIGNED_INT,                GL_UNSIGNED_INT, false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RGBA_INTEGER, false,  8,  8,  8,  8, 0, GL_RGBA_INTEGER, GL_BYTE,                        GL_INT,          false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RGBA_INTEGER, false,  8,  8,  8,  8, 0, GL_RGBA_INTEGER, GL_UNSIGNED_BYTE,               GL_UNSIGNED_INT, false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RGBA_INTEGER, false, 16, 16, 16, 16, 0, GL_RGBA_INTEGER, GL_SHORT,                       GL_INT,          false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RGBA_INTEGER, false, 16, 16, 16, 16, 0, GL_RGBA_INTEGER, GL_UNSIGNED_SHORT,              GL_UNSIGNED_INT, false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RGBA_INTEGER, false, 32, 32, 32, 32, 0, GL_RGBA_INTEGER, GL_INT,                         GL_INT,          false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RGBA_INTEGER, false, 32, 32, 32, 32, 0, GL_RGBA_INTEGER, GL_UNSIGNED_INT,                GL_UNSIGNED_INT, false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RGBA_INTEGER, false, 10, 10, 10,  2, 0, GL_RGBA_INTEGER, GL_UNSIGNED_INT_2_10_10_10_REV, GL_UNSIGNED_INT, false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);

   // Unsized floating point formats
   //                 |Internal format |sized | R | G | B | A |S | Format | Type                           | Comp    | SRGB | Texture supported                                                         | Filterable                                     | Texture attachment                             | Renderbuffer  | Blend
   AddRGBAFormat(&map, GL_RED,          false, 16,  0,  0,  0, 0, GL_RED,  GL_HALF_FLOAT,                   GL_FLOAT, false, NeverSupported,                                                             NeverSupported,                                  NeverSupported,                                  NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RG,           false, 16, 16,  0,  0, 0, GL_RG,   GL_HALF_FLOAT,                   GL_FLOAT, false, NeverSupported,                                                             NeverSupported,                                  NeverSupported,                                  NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RGB,          false, 16, 16, 16,  0, 0, GL_RGB,  GL_HALF_FLOAT,                   GL_FLOAT, false, NeverSupported,                                                             NeverSupported,                                  NeverSupported,                                  NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RGBA,         false, 16, 16, 16, 16, 0, GL_RGBA, GL_HALF_FLOAT,                   GL_FLOAT, false, NeverSupported,                                                             NeverSupported,                                  NeverSupported,                                  NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RED,          false, 16,  0,  0,  0, 0, GL_RED,  GL_HALF_FLOAT_OES,               GL_FLOAT, false, RequireExtAndExt<&Extensions::textureHalfFloatOES, &Extensions::textureRgEXT>,    RequireExt<&Extensions::textureHalfFloatLinearOES>, AlwaysSupported,                                 NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RG,           false, 16, 16,  0,  0, 0, GL_RG,   GL_HALF_FLOAT_OES,               GL_FLOAT, false, RequireExtAndExt<&Extensions::textureHalfFloatOES, &Extensions::textureRgEXT>,    RequireExt<&Extensions::textureHalfFloatLinearOES>, AlwaysSupported,                                 NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RGB,          false, 16, 16, 16,  0, 0, GL_RGB,  GL_HALF_FLOAT_OES,               GL_FLOAT, false, RequireExt<&Extensions::textureHalfFloatOES>,                                  RequireExt<&Extensions::textureHalfFloatLinearOES>, RequireExt<&Extensions::colorBufferHalfFloatEXT>,   NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RGBA,         false, 16, 16, 16, 16, 0, GL_RGBA, GL_HALF_FLOAT_OES,               GL_FLOAT, false, RequireExt<&Extensions::textureHalfFloatOES>,                                  RequireExt<&Extensions::textureHalfFloatLinearOES>, RequireExt<&Extensions::colorBufferHalfFloatEXT>,   NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RED,          false, 32,  0,  0,  0, 0, GL_RED,  GL_FLOAT,                        GL_FLOAT, false, RequireExtAndExt<&Extensions::textureFloatOES, &Extensions::textureRgEXT>,     RequireExt<&Extensions::textureFloatLinearOES>,  AlwaysSupported,                                 NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RG,           false, 32, 32,  0,  0, 0, GL_RG,   GL_FLOAT,                        GL_FLOAT, false, RequireExtAndExt<&Extensions::textureFloatOES, &Extensions::textureRgEXT>,     RequireExt<&Extensions::textureFloatLinearOES>,  AlwaysSupported,                                 NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RGB,          false, 32, 32, 32,  0, 0, GL_RGB,  GL_FLOAT,                        GL_FLOAT, false, RequireExt<&Extensions::textureFloatOES>,                                   RequireExt<&Extensions::textureFloatLinearOES>,  NeverSupported,                                  NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RGB,          false,  9,  9,  9,  0, 5, GL_RGB,  GL_UNSIGNED_INT_5_9_9_9_REV,     GL_FLOAT, false, NeverSupported,                                                             NeverSupported,                                  NeverSupported,                                  NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RGB,          false, 11, 11, 10,  0, 0, GL_RGB,  GL_UNSIGNED_INT_10F_11F_11F_REV, GL_FLOAT, false, NeverSupported,                                                             NeverSupported,                                  NeverSupported,                                  NeverSupported, NeverSupported);
   AddRGBAFormat(&map, GL_RGBA,         false, 32, 32, 32, 32, 0, GL_RGBA, GL_FLOAT,                        GL_FLOAT, false, RequireExt<&Extensions::textureFloatOES>,                                   RequireExt<&Extensions::textureFloatLinearOES>,  NeverSupported,                                  NeverSupported, NeverSupported);

   // Unsized luminance alpha formats
   //                 | Internal format   |sized | L | A | Format            | Type             | Component type        | Texture supported                        | Filterable                                     | Texture attachment | Renderbuffer  | Blend
   AddLUMAFormat(&map, GL_ALPHA,           false,  0,  8, GL_ALPHA,           GL_UNSIGNED_BYTE,  GL_UNSIGNED_NORMALIZED, AlwaysSupported,                           AlwaysSupported,                                 NeverSupported,      NeverSupported, NeverSupported);
   AddLUMAFormat(&map, GL_LUMINANCE,       false,  8,  0, GL_LUMINANCE,       GL_UNSIGNED_BYTE,  GL_UNSIGNED_NORMALIZED, AlwaysSupported,                           AlwaysSupported,                                 NeverSupported,      NeverSupported, NeverSupported);
   AddLUMAFormat(&map, GL_LUMINANCE_ALPHA, false,  8,  8, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE,  GL_UNSIGNED_NORMALIZED, AlwaysSupported,                           AlwaysSupported,                                 NeverSupported,      NeverSupported, NeverSupported);
   AddLUMAFormat(&map, GL_ALPHA,           false,  0, 16, GL_ALPHA,           GL_HALF_FLOAT_OES, GL_FLOAT,               RequireExt<&Extensions::textureHalfFloatOES>, RequireExt<&Extensions::textureHalfFloatLinearOES>, NeverSupported,      NeverSupported, NeverSupported);
   AddLUMAFormat(&map, GL_LUMINANCE,       false, 16,  0, GL_LUMINANCE,       GL_HALF_FLOAT_OES, GL_FLOAT,               RequireExt<&Extensions::textureHalfFloatOES>, RequireExt<&Extensions::textureHalfFloatLinearOES>, NeverSupported,      NeverSupported, NeverSupported);
   AddLUMAFormat(&map, GL_LUMINANCE_ALPHA, false, 16, 16, GL_LUMINANCE_ALPHA, GL_HALF_FLOAT_OES, GL_FLOAT,               RequireExt<&Extensions::textureHalfFloatOES>, RequireExt<&Extensions::textureHalfFloatLinearOES>, NeverSupported,      NeverSupported, NeverSupported);
   AddLUMAFormat(&map, GL_ALPHA,           false,  0, 32, GL_ALPHA,           GL_FLOAT,          GL_FLOAT,               RequireExt<&Extensions::textureFloatOES>,  RequireExt<&Extensions::textureFloatLinearOES>,  NeverSupported,      NeverSupported, NeverSupported);
   AddLUMAFormat(&map, GL_LUMINANCE,       false, 32,  0, GL_LUMINANCE,       GL_FLOAT,          GL_FLOAT,               RequireExt<&Extensions::textureFloatOES>,  RequireExt<&Extensions::textureFloatLinearOES>,  NeverSupported,      NeverSupported, NeverSupported);
   AddLUMAFormat(&map, GL_LUMINANCE_ALPHA, false, 32, 32, GL_LUMINANCE_ALPHA, GL_FLOAT,          GL_FLOAT,               RequireExt<&Extensions::textureFloatOES>,  RequireExt<&Extensions::textureFloatLinearOES>,  NeverSupported,      NeverSupported, NeverSupported);

   // Unsized depth stencil formats
   //                         | Internal format   |sized | D |S | X | Format            | Type                             | Component type        | Texture supported                                       | Filterable     | Texture attachment                                                                  | Renderbuffer                                                                       | Blend
   AddDepthStencilFormat(&map, GL_DEPTH_COMPONENT, false, 16, 0,  0, GL_DEPTH_COMPONENT, GL_UNSIGNED_SHORT,                 GL_UNSIGNED_NORMALIZED, RequireES<1, 0>,                                          AlwaysSupported, RequireExtOrExt<&Extensions::depthTextureANGLE, &Extensions::depthTextureOES>,        RequireExtOrExt<&Extensions::depthTextureANGLE, &Extensions::depthTextureOES>,        RequireExtOrExt<&Extensions::depthTextureANGLE, &Extensions::depthTextureOES>);
   AddDepthStencilFormat(&map, GL_DEPTH_COMPONENT, false, 24, 0,  8, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT,                   GL_UNSIGNED_NORMALIZED, RequireES<1, 0>,                                          AlwaysSupported, RequireExtOrExt<&Extensions::depthTextureANGLE, &Extensions::depthTextureOES>,        RequireExtOrExt<&Extensions::depthTextureANGLE, &Extensions::depthTextureOES>,        RequireExtOrExt<&Extensions::depthTextureANGLE, &Extensions::depthTextureOES>);
   AddDepthStencilFormat(&map, GL_DEPTH_COMPONENT, false, 32, 0,  0, GL_DEPTH_COMPONENT, GL_FLOAT,                          GL_FLOAT,               RequireES<1, 0>,                                          AlwaysSupported, RequireES<1, 0>,                                                                      RequireES<1, 0>,                                                                      RequireES<1, 0>);
   AddDepthStencilFormat(&map, GL_DEPTH_COMPONENT, false, 24, 8,  0, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT_24_8,              GL_UNSIGNED_NORMALIZED, RequireESOrExt<3, 0, &Extensions::packedDepthStencilOES>, AlwaysSupported, RequireExtAndExt<&Extensions::packedDepthStencilOES, &Extensions::depthTextureANGLE>, RequireExtAndExt<&Extensions::packedDepthStencilOES, &Extensions::depthTextureANGLE>, RequireExtAndExt<&Extensions::packedDepthStencilOES, &Extensions::depthTextureANGLE>);
   AddDepthStencilFormat(&map, GL_DEPTH_STENCIL,   false, 24, 8,  0, GL_DEPTH_STENCIL,   GL_UNSIGNED_INT_24_8,              GL_UNSIGNED_NORMALIZED, RequireESOrExt<3, 0, &Extensions::packedDepthStencilOES>, AlwaysSupported, RequireExtAndExt<&Extensions::packedDepthStencilOES, &Extensions::depthTextureANGLE>, RequireExtAndExt<&Extensions::packedDepthStencilOES, &Extensions::depthTextureANGLE>, RequireExtAndExt<&Extensions::packedDepthStencilOES, &Extensions::depthTextureANGLE>);
   AddDepthStencilFormat(&map, GL_DEPTH_STENCIL,   false, 32, 8, 24, GL_DEPTH_STENCIL,   GL_FLOAT_32_UNSIGNED_INT_24_8_REV, GL_FLOAT,               RequireESOrExt<3, 0, &Extensions::packedDepthStencilOES>, AlwaysSupported, RequireExt<&Extensions::packedDepthStencilOES>,                                       RequireExt<&Extensions::packedDepthStencilOES>,                                       RequireExt<&Extensions::packedDepthStencilOES>);
   AddDepthStencilFormat(&map, GL_STENCIL,         false,  0, 8,  0, GL_STENCIL,         GL_UNSIGNED_BYTE,                  GL_UNSIGNED_NORMALIZED, RequireES<1, 0>,                                          NeverSupported , RequireES<1, 0>,                                                                      RequireES<1, 0>,                                                                      RequireES<1, 0>);
   AddDepthStencilFormat(&map, GL_STENCIL_INDEX,   false,  0, 8,  0, GL_STENCIL_INDEX,   GL_UNSIGNED_BYTE,                  GL_UNSIGNED_NORMALIZED, RequireES<3, 1>,                                          NeverSupported , RequireES<3, 1>,                                                                      RequireES<3, 1>,                                                                      RequireES<3, 1>);

   // Non-standard YUV formats
   //                 | Internal format                             | sized | Cr | Y | Cb | A | S | Format                              | Type            | Comp                  | SRGB | Texture supported                                       | Filterable                                              | Texture attachment                                      | Renderbuffer  | Blend
   AddYUVFormat(&map,  GL_G8_B8R8_2PLANE_420_UNORM_ANGLE,            true,   8,   8,  8,   0,  0,  GL_G8_B8R8_2PLANE_420_UNORM_ANGLE,    GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::yuvInternalFormatANGLE>,          RequireExt<&Extensions::yuvInternalFormatANGLE>,          RequireExt<&Extensions::yuvInternalFormatANGLE>,          NeverSupported, NeverSupported);
   AddYUVFormat(&map,  GL_G8_B8_R8_3PLANE_420_UNORM_ANGLE,           true,   8,   8,  8,   0,  0,  GL_G8_B8_R8_3PLANE_420_UNORM_ANGLE,   GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::yuvInternalFormatANGLE>,          RequireExt<&Extensions::yuvInternalFormatANGLE>,          RequireExt<&Extensions::yuvInternalFormatANGLE>,          NeverSupported, NeverSupported);

#if defined(ANGLE_PLATFORM_LINUX)
   // From GL_OES_required_internalformat
   // The |shared| bit shouldn't be 2. But given this hits assertion when bits
   // are checked, it's fine to have this bit set as 2 as a workaround.
   AddRGBAFormat(&map, GL_RGB10_EXT,        true, 10, 10, 10, 0, 2, GL_RGB, GL_UNSIGNED_INT_2_10_10_10_REV,    GL_UNSIGNED_NORMALIZED,        false, RequireES<1, 0>,                                      NeverSupported,  RequireES<1, 0>,                                         RequireES<1, 0>,                                 NeverSupported);
#endif
   // clang-format on

   return map;
}

const InternalFormatInfoMap &GetInternalFormatMap()
{
   static const angle::base::NoDestructor<InternalFormatInfoMap> formatMap(
       BuildInternalFormatInfoMap());
   return *formatMap;
}

int GetAndroidHardwareBufferFormatFromChannelSizes(const egl::AttributeMap &attribMap)
{
   // Retrieve channel size from attribute map. The default value should be 0, per spec.
   GLuint redSize   = static_cast<GLuint>(attribMap.getAsInt(EGL_RED_SIZE, 0));
   GLuint greenSize = static_cast<GLuint>(attribMap.getAsInt(EGL_GREEN_SIZE, 0));
   GLuint blueSize  = static_cast<GLuint>(attribMap.getAsInt(EGL_BLUE_SIZE, 0));
   GLuint alphaSize = static_cast<GLuint>(attribMap.getAsInt(EGL_ALPHA_SIZE, 0));

   GLenum glInternalFormat = 0;
   for (GLenum sizedInternalFormat : angle::android::kSupportedSizedInternalFormats)
   {
       const gl::InternalFormat &internalFormat = GetSizedInternalFormatInfo(sizedInternalFormat);
       ASSERT(internalFormat.internalFormat != GL_NONE && internalFormat.sized);

       if (internalFormat.isChannelSizeCompatible(redSize, greenSize, blueSize, alphaSize))
       {
           glInternalFormat = sizedInternalFormat;
           break;
       }
   }

   return (glInternalFormat != 0)
              ? angle::android::GLInternalFormatToNativePixelFormat(glInternalFormat)
              : 0;
}

GLenum GetConfigColorBufferFormat(const egl::Config *config)
{
   GLenum componentType = GL_NONE;
   switch (config->colorComponentType)
   {
       case EGL_COLOR_COMPONENT_TYPE_FIXED_EXT:
           componentType = GL_UNSIGNED_NORMALIZED;
           break;
       case EGL_COLOR_COMPONENT_TYPE_FLOAT_EXT:
           componentType = GL_FLOAT;
           break;
       default:
           UNREACHABLE();
           return GL_NONE;
   }

   GLenum colorEncoding = GL_LINEAR;

   for (GLenum sizedInternalFormat : GetAllSizedInternalFormats())
   {
       const gl::InternalFormat &internalFormat = GetSizedInternalFormatInfo(sizedInternalFormat);

       if (internalFormat.componentType == componentType &&
           internalFormat.colorEncoding == colorEncoding &&
           internalFormat.isChannelSizeCompatible(config->redSize, config->greenSize,
                                                  config->blueSize, config->alphaSize))
       {
           return sizedInternalFormat;
       }
   }

   // Only expect to get here if there is no color bits in the config
   ASSERT(config->redSize == 0 && config->greenSize == 0 && config->blueSize == 0 &&
          config->alphaSize == 0);
   return GL_NONE;
}

GLenum GetConfigDepthStencilBufferFormat(const egl::Config *config)
{
   GLenum componentType = GL_UNSIGNED_NORMALIZED;

   for (GLenum sizedInternalFormat : GetAllSizedInternalFormats())
   {
       const gl::InternalFormat &internalFormat = GetSizedInternalFormatInfo(sizedInternalFormat);

       if (internalFormat.componentType == componentType &&
           static_cast<EGLint>(internalFormat.depthBits) == config->depthSize &&
           static_cast<EGLint>(internalFormat.stencilBits) == config->stencilSize)
       {
           return sizedInternalFormat;
       }
   }

   // Only expect to get here if there is no depth or stencil bits in the config
   ASSERT(config->depthSize == 0 && config->stencilSize == 0);
   return GL_NONE;
}

static FormatSet BuildAllSizedInternalFormatSet()
{
   FormatSet result;

   for (const auto &internalFormat : GetInternalFormatMap())
   {
       for (const auto &type : internalFormat.second)
       {
           if (type.second.sized)
           {
               // TODO(jmadill): Fix this hack.
               if (internalFormat.first == GL_BGR565_ANGLEX)
                   continue;

               result.insert(internalFormat.first);
           }
       }
   }

   return result;
}

uint32_t GetPackedTypeInfo(GLenum type)
{
   switch (type)
   {
       case GL_UNSIGNED_BYTE:
       case GL_BYTE:
       {
           static constexpr uint32_t kPacked = PackTypeInfo(1, false);
           return kPacked;
       }
       case GL_UNSIGNED_SHORT:
       case GL_SHORT:
       case GL_HALF_FLOAT:
       case GL_HALF_FLOAT_OES:
       {
           static constexpr uint32_t kPacked = PackTypeInfo(2, false);
           return kPacked;
       }
       case GL_UNSIGNED_INT:
       case GL_INT:
       case GL_FLOAT:
       {
           static constexpr uint32_t kPacked = PackTypeInfo(4, false);
           return kPacked;
       }
       case GL_UNSIGNED_SHORT_5_6_5:
       case GL_UNSIGNED_SHORT_4_4_4_4:
       case GL_UNSIGNED_SHORT_5_5_5_1:
       case GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT:
       case GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT:
       {
           static constexpr uint32_t kPacked = PackTypeInfo(2, true);
           return kPacked;
       }
       case GL_UNSIGNED_INT_2_10_10_10_REV:
       case GL_UNSIGNED_INT_24_8:
       case GL_UNSIGNED_INT_10F_11F_11F_REV:
       case GL_UNSIGNED_INT_5_9_9_9_REV:
       {
           ASSERT(GL_UNSIGNED_INT_24_8_OES == GL_UNSIGNED_INT_24_8);
           static constexpr uint32_t kPacked = PackTypeInfo(4, true);
           return kPacked;
       }
       case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
       {
           static constexpr uint32_t kPacked = PackTypeInfo(8, true);
           return kPacked;
       }
       default:
       {
           return 0;
       }
   }
}

const InternalFormat &GetSizedInternalFormatInfo(GLenum internalFormat)
{
   static const InternalFormat defaultInternalFormat;
   const InternalFormatInfoMap &formatMap = GetInternalFormatMap();
   auto iter                              = formatMap.find(internalFormat);

   // Sized internal formats only have one type per entry
   if (iter == formatMap.end() || iter->second.size() != 1)
   {
       return defaultInternalFormat;
   }

   const InternalFormat &internalFormatInfo = iter->second.begin()->second;
   if (!internalFormatInfo.sized)
   {
       return defaultInternalFormat;
   }

   return internalFormatInfo;
}

const InternalFormat &GetInternalFormatInfo(GLenum internalFormat, GLenum type)
{
   static const InternalFormat defaultInternalFormat;
   const InternalFormatInfoMap &formatMap = GetInternalFormatMap();

   auto internalFormatIter = formatMap.find(internalFormat);
   if (internalFormatIter == formatMap.end())
   {
       return defaultInternalFormat;
   }

   // If the internal format is sized, simply return it without the type check.
   if (internalFormatIter->second.size() == 1 && internalFormatIter->second.begin()->second.sized)
   {
       return internalFormatIter->second.begin()->second;
   }

   auto typeIter = internalFormatIter->second.find(type);
   if (typeIter == internalFormatIter->second.end())
   {
       return defaultInternalFormat;
   }

   return typeIter->second;
}

GLuint InternalFormat::computePixelBytes(GLenum formatType) const
{
   const auto &typeInfo = GetTypeInfo(formatType);
   GLuint components    = typeInfo.specialInterpretation ? 1u : componentCount;
   return components * typeInfo.bytes;
}

bool InternalFormat::computeBufferRowLength(uint32_t width, uint32_t *resultOut) const
{
   CheckedNumeric<GLuint> checkedWidth(width);

   if (compressed)
   {
       angle::CheckedNumeric<uint32_t> checkedRowLength =
           rx::CheckedRoundUp<uint32_t>(width, compressedBlockWidth);

       return CheckedMathResult(checkedRowLength, resultOut);
   }

   return CheckedMathResult(checkedWidth, resultOut);
}

bool InternalFormat::computeBufferImageHeight(uint32_t height, uint32_t *resultOut) const
{
   CheckedNumeric<GLuint> checkedHeight(height);

   if (compressed)
   {
       angle::CheckedNumeric<uint32_t> checkedImageHeight =
           rx::CheckedRoundUp<uint32_t>(height, compressedBlockHeight);

       return CheckedMathResult(checkedImageHeight, resultOut);
   }

   return CheckedMathResult(checkedHeight, resultOut);
}

bool InternalFormat::computePalettedImageRowPitch(GLsizei width, GLuint *resultOut) const
{
   ASSERT(paletted);
   switch (paletteBits)
   {
       case 4:
           *resultOut = (width + 1) / 2;
           return true;
       case 8:
           *resultOut = width;
           return true;
       default:
           UNREACHABLE();
           return false;
   }
}

bool InternalFormat::computeRowPitch(GLenum formatType,
                                    GLsizei width,
                                    GLint alignment,
                                    GLint rowLength,
                                    GLuint *resultOut) const
{
   if (paletted)
   {
       return computePalettedImageRowPitch(width, resultOut);
   }

   // Compressed images do not use pack/unpack parameters (rowLength).
   if (compressed)
   {
       return computeCompressedImageSize(Extents(width, 1, 1), resultOut);
   }

   CheckedNumeric<GLuint> checkedWidth(rowLength > 0 ? rowLength : width);
   CheckedNumeric<GLuint> checkedRowBytes = checkedWidth * computePixelBytes(formatType);

   ASSERT(alignment > 0 && isPow2(alignment));
   CheckedNumeric<GLuint> checkedAlignment(alignment);
   auto aligned = rx::roundUp(checkedRowBytes, checkedAlignment);
   return CheckedMathResult(aligned, resultOut);
}

bool InternalFormat::computeDepthPitch(GLsizei height,
                                      GLint imageHeight,
                                      GLuint rowPitch,
                                      GLuint *resultOut) const
{
   // Compressed images do not use pack/unpack parameters (imageHeight).
   CheckedNumeric<GLuint> pixelsHeight(!compressed && (imageHeight > 0)
                                           ? static_cast<GLuint>(imageHeight)
                                           : static_cast<GLuint>(height));

   CheckedNumeric<GLuint> rowCount;
   if (compressed)
   {
       CheckedNumeric<GLuint> checkedBlockHeight(compressedBlockHeight);
       rowCount = (pixelsHeight + checkedBlockHeight - 1u) / checkedBlockHeight;
   }
   else
   {
       rowCount = pixelsHeight;
   }

   CheckedNumeric<GLuint> checkedRowPitch(rowPitch);

   return CheckedMathResult(checkedRowPitch * rowCount, resultOut);
}

bool InternalFormat::computeDepthPitch(GLenum formatType,
                                      GLsizei width,
                                      GLsizei height,
                                      GLint alignment,
                                      GLint rowLength,
                                      GLint imageHeight,
                                      GLuint *resultOut) const
{
   GLuint rowPitch = 0;
   if (!computeRowPitch(formatType, width, alignment, rowLength, &rowPitch))
   {
       return false;
   }
   return computeDepthPitch(height, imageHeight, rowPitch, resultOut);
}

bool InternalFormat::computeCompressedImageSize(const Extents &size, GLuint *resultOut) const
{
   CheckedNumeric<GLuint> checkedWidth(size.width);
   CheckedNumeric<GLuint> checkedHeight(size.height);
   CheckedNumeric<GLuint> checkedDepth(size.depth);

   if (paletted)
   {
       ASSERT(!compressed);

       GLuint paletteSize  = 1 << paletteBits;
       GLuint paletteBytes = paletteSize * pixelBytes;

       GLuint rowPitch;
       if (!computePalettedImageRowPitch(size.width, &rowPitch))
       {
           return false;
       }

       if (size.depth != 1)
       {
           return false;
       }

       CheckedNumeric<GLuint> checkedPaletteBytes(paletteBytes);
       CheckedNumeric<GLuint> checkedRowPitch(rowPitch);

       return CheckedMathResult(checkedPaletteBytes + checkedRowPitch * checkedHeight, resultOut);
   }

   CheckedNumeric<GLuint> checkedBlockWidth(compressedBlockWidth);
   CheckedNumeric<GLuint> checkedBlockHeight(compressedBlockHeight);
   GLuint minBlockWidth, minBlockHeight;
   std::tie(minBlockWidth, minBlockHeight) = getCompressedImageMinBlocks();

   ASSERT(compressed);
   auto numBlocksWide = (checkedWidth + checkedBlockWidth - 1u) / checkedBlockWidth;
   auto numBlocksHigh = (checkedHeight + checkedBlockHeight - 1u) / checkedBlockHeight;
   if (numBlocksWide.IsValid() && numBlocksWide.ValueOrDie() < minBlockWidth)
       numBlocksWide = minBlockWidth;
   if (numBlocksHigh.IsValid() && numBlocksHigh.ValueOrDie() < minBlockHeight)
       numBlocksHigh = minBlockHeight;
   auto bytes = numBlocksWide * numBlocksHigh * pixelBytes * checkedDepth;
   return CheckedMathResult(bytes, resultOut);
}

std::pair<GLuint, GLuint> InternalFormat::getCompressedImageMinBlocks() const
{
   GLuint minBlockWidth  = 0;
   GLuint minBlockHeight = 0;

   // Per the specification, a PVRTC block needs information from the 3 nearest blocks.
   // GL_IMG_texture_compression_pvrtc specifies the minimum size requirement in pixels, but
   // ANGLE's texture tables are written in terms of blocks. The 4BPP formats use 4x4 blocks, and
   // the 2BPP formats, 8x4 blocks. Therefore, both kinds of formats require a minimum of 2x2
   // blocks.
   switch (internalFormat)
   {
       case GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG:
       case GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG:
       case GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG:
       case GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG:
       case GL_COMPRESSED_SRGB_PVRTC_2BPPV1_EXT:
       case GL_COMPRESSED_SRGB_PVRTC_4BPPV1_EXT:
       case GL_COMPRESSED_SRGB_ALPHA_PVRTC_2BPPV1_EXT:
       case GL_COMPRESSED_SRGB_ALPHA_PVRTC_4BPPV1_EXT:
           minBlockWidth  = 2;
           minBlockHeight = 2;
           break;

       default:
           break;
   }

   return std::make_pair(minBlockWidth, minBlockHeight);
}

bool InternalFormat::computeSkipBytes(GLenum formatType,
                                     GLuint rowPitch,
                                     GLuint depthPitch,
                                     const PixelStoreStateBase &state,
                                     bool is3D,
                                     GLuint *resultOut) const
{
   CheckedNumeric<GLuint> checkedRowPitch(rowPitch);
   CheckedNumeric<GLuint> checkedDepthPitch(depthPitch);
   CheckedNumeric<GLuint> checkedSkipImages(static_cast<GLuint>(state.skipImages));
   CheckedNumeric<GLuint> checkedSkipRows(static_cast<GLuint>(state.skipRows));
   CheckedNumeric<GLuint> checkedSkipPixels(static_cast<GLuint>(state.skipPixels));
   CheckedNumeric<GLuint> checkedPixelBytes(computePixelBytes(formatType));
   auto checkedSkipImagesBytes = checkedSkipImages * checkedDepthPitch;
   if (!is3D)
   {
       checkedSkipImagesBytes = 0;
   }
   auto skipBytes = checkedSkipImagesBytes + checkedSkipRows * checkedRowPitch +
                    checkedSkipPixels * checkedPixelBytes;
   return CheckedMathResult(skipBytes, resultOut);
}

bool InternalFormat::computePackUnpackEndByte(GLenum formatType,
                                             const Extents &size,
                                             const PixelStoreStateBase &state,
                                             bool is3D,
                                             GLuint *resultOut) const
{
   GLuint rowPitch = 0;
   if (!computeRowPitch(formatType, size.width, state.alignment, state.rowLength, &rowPitch))
   {
       return false;
   }

   GLuint depthPitch = 0;
   if (is3D && !computeDepthPitch(size.height, state.imageHeight, rowPitch, &depthPitch))
   {
       return false;
   }

   CheckedNumeric<GLuint> checkedCopyBytes(0);
   if (compressed)
   {
       GLuint copyBytes = 0;
       if (!computeCompressedImageSize(size, &copyBytes))
       {
           return false;
       }
       checkedCopyBytes = copyBytes;
   }
   else if (size.height != 0 && (!is3D || size.depth != 0))
   {
       CheckedNumeric<GLuint> bytes = computePixelBytes(formatType);
       checkedCopyBytes += size.width * bytes;

       CheckedNumeric<GLuint> heightMinusOne = size.height - 1;
       checkedCopyBytes += heightMinusOne * rowPitch;

       if (is3D)
       {
           CheckedNumeric<GLuint> depthMinusOne = size.depth - 1;
           checkedCopyBytes += depthMinusOne * depthPitch;
       }
   }

   GLuint skipBytes = 0;
   if (!computeSkipBytes(formatType, rowPitch, depthPitch, state, is3D, &skipBytes))
   {
       return false;
   }

   CheckedNumeric<GLuint> endByte = checkedCopyBytes + CheckedNumeric<GLuint>(skipBytes);

   return CheckedMathResult(endByte, resultOut);
}

GLenum GetUnsizedFormat(GLenum internalFormat)
{
   auto sizedFormatInfo = GetSizedInternalFormatInfo(internalFormat);
   if (sizedFormatInfo.internalFormat != GL_NONE)
   {
       return sizedFormatInfo.format;
   }

   return internalFormat;
}

bool CompressedFormatRequiresWholeImage(GLenum internalFormat)
{
   // List of compressed texture format that require that the sub-image size is equal to texture's
   // respective mip level's size
   return IsPVRTC1Format(internalFormat);
}

void MaybeOverrideLuminance(GLenum &format, GLenum &type, GLenum actualFormat, GLenum actualType)
{
   gl::InternalFormat internalFormat = gl::GetInternalFormatInfo(format, type);
   if (internalFormat.isLUMA())
   {
       // Ensure the format and type are compatible
       ASSERT(internalFormat.pixelBytes ==
              gl::GetInternalFormatInfo(actualFormat, actualType).pixelBytes);

       // For Luminance formats, override with the internal format. Since this is not
       // renderable, our pixel pack routines don't handle it correctly.
       format = actualFormat;
       type   = actualType;
   }
}

const FormatSet &GetAllSizedInternalFormats()
{
   static angle::base::NoDestructor<FormatSet> formatSet(BuildAllSizedInternalFormatSet());
   return *formatSet;
}

AttributeType GetAttributeType(GLenum enumValue)
{
   switch (enumValue)
   {
       case GL_FLOAT:
           return ATTRIBUTE_FLOAT;
       case GL_FLOAT_VEC2:
           return ATTRIBUTE_VEC2;
       case GL_FLOAT_VEC3:
           return ATTRIBUTE_VEC3;
       case GL_FLOAT_VEC4:
           return ATTRIBUTE_VEC4;
       case GL_INT:
           return ATTRIBUTE_INT;
       case GL_INT_VEC2:
           return ATTRIBUTE_IVEC2;
       case GL_INT_VEC3:
           return ATTRIBUTE_IVEC3;
       case GL_INT_VEC4:
           return ATTRIBUTE_IVEC4;
       case GL_UNSIGNED_INT:
           return ATTRIBUTE_UINT;
       case GL_UNSIGNED_INT_VEC2:
           return ATTRIBUTE_UVEC2;
       case GL_UNSIGNED_INT_VEC3:
           return ATTRIBUTE_UVEC3;
       case GL_UNSIGNED_INT_VEC4:
           return ATTRIBUTE_UVEC4;
       case GL_FLOAT_MAT2:
           return ATTRIBUTE_MAT2;
       case GL_FLOAT_MAT3:
           return ATTRIBUTE_MAT3;
       case GL_FLOAT_MAT4:
           return ATTRIBUTE_MAT4;
       case GL_FLOAT_MAT2x3:
           return ATTRIBUTE_MAT2x3;
       case GL_FLOAT_MAT2x4:
           return ATTRIBUTE_MAT2x4;
       case GL_FLOAT_MAT3x2:
           return ATTRIBUTE_MAT3x2;
       case GL_FLOAT_MAT3x4:
           return ATTRIBUTE_MAT3x4;
       case GL_FLOAT_MAT4x2:
           return ATTRIBUTE_MAT4x2;
       case GL_FLOAT_MAT4x3:
           return ATTRIBUTE_MAT4x3;
       default:
           UNREACHABLE();
           return ATTRIBUTE_FLOAT;
   }
}

angle::FormatID GetVertexFormatID(VertexAttribType type,
                                 GLboolean normalized,
                                 GLuint components,
                                 bool pureInteger)
{
   switch (type)
   {
       case VertexAttribType::Byte:
           switch (components)
           {
               case 1:
                   if (pureInteger)
                       return angle::FormatID::R8_SINT;
                   if (normalized)
                       return angle::FormatID::R8_SNORM;
                   return angle::FormatID::R8_SSCALED;
               case 2:
                   if (pureInteger)
                       return angle::FormatID::R8G8_SINT;
                   if (normalized)
                       return angle::FormatID::R8G8_SNORM;
                   return angle::FormatID::R8G8_SSCALED;
               case 3:
                   if (pureInteger)
                       return angle::FormatID::R8G8B8_SINT;
                   if (normalized)
                       return angle::FormatID::R8G8B8_SNORM;
                   return angle::FormatID::R8G8B8_SSCALED;
               case 4:
                   if (pureInteger)
                       return angle::FormatID::R8G8B8A8_SINT;
                   if (normalized)
                       return angle::FormatID::R8G8B8A8_SNORM;
                   return angle::FormatID::R8G8B8A8_SSCALED;
               default:
                   UNREACHABLE();
                   return angle::FormatID::NONE;
           }
       case VertexAttribType::UnsignedByte:
           switch (components)
           {
               case 1:
                   if (pureInteger)
                       return angle::FormatID::R8_UINT;
                   if (normalized)
                       return angle::FormatID::R8_UNORM;
                   return angle::FormatID::R8_USCALED;
               case 2:
                   if (pureInteger)
                       return angle::FormatID::R8G8_UINT;
                   if (normalized)
                       return angle::FormatID::R8G8_UNORM;
                   return angle::FormatID::R8G8_USCALED;
               case 3:
                   if (pureInteger)
                       return angle::FormatID::R8G8B8_UINT;
                   if (normalized)
                       return angle::FormatID::R8G8B8_UNORM;
                   return angle::FormatID::R8G8B8_USCALED;
               case 4:
                   if (pureInteger)
                       return angle::FormatID::R8G8B8A8_UINT;
                   if (normalized)
                       return angle::FormatID::R8G8B8A8_UNORM;
                   return angle::FormatID::R8G8B8A8_USCALED;
               default:
                   UNREACHABLE();
                   return angle::FormatID::NONE;
           }
       case VertexAttribType::Short:
           switch (components)
           {
               case 1:
                   if (pureInteger)
                       return angle::FormatID::R16_SINT;
                   if (normalized)
                       return angle::FormatID::R16_SNORM;
                   return angle::FormatID::R16_SSCALED;
               case 2:
                   if (pureInteger)
                       return angle::FormatID::R16G16_SINT;
                   if (normalized)
                       return angle::FormatID::R16G16_SNORM;
                   return angle::FormatID::R16G16_SSCALED;
               case 3:
                   if (pureInteger)
                       return angle::FormatID::R16G16B16_SINT;
                   if (normalized)
                       return angle::FormatID::R16G16B16_SNORM;
                   return angle::FormatID::R16G16B16_SSCALED;
               case 4:
                   if (pureInteger)
                       return angle::FormatID::R16G16B16A16_SINT;
                   if (normalized)
                       return angle::FormatID::R16G16B16A16_SNORM;
                   return angle::FormatID::R16G16B16A16_SSCALED;
               default:
                   UNREACHABLE();
                   return angle::FormatID::NONE;
           }
       case VertexAttribType::UnsignedShort:
           switch (components)
           {
               case 1:
                   if (pureInteger)
                       return angle::FormatID::R16_UINT;
                   if (normalized)
                       return angle::FormatID::R16_UNORM;
                   return angle::FormatID::R16_USCALED;
               case 2:
                   if (pureInteger)
                       return angle::FormatID::R16G16_UINT;
                   if (normalized)
                       return angle::FormatID::R16G16_UNORM;
                   return angle::FormatID::R16G16_USCALED;
               case 3:
                   if (pureInteger)
                       return angle::FormatID::R16G16B16_UINT;
                   if (normalized)
                       return angle::FormatID::R16G16B16_UNORM;
                   return angle::FormatID::R16G16B16_USCALED;
               case 4:
                   if (pureInteger)
                       return angle::FormatID::R16G16B16A16_UINT;
                   if (normalized)
                       return angle::FormatID::R16G16B16A16_UNORM;
                   return angle::FormatID::R16G16B16A16_USCALED;
               default:
                   UNREACHABLE();
                   return angle::FormatID::NONE;
           }
       case VertexAttribType::Int:
           switch (components)
           {
               case 1:
                   if (pureInteger)
                       return angle::FormatID::R32_SINT;
                   if (normalized)
                       return angle::FormatID::R32_SNORM;
                   return angle::FormatID::R32_SSCALED;
               case 2:
                   if (pureInteger)
                       return angle::FormatID::R32G32_SINT;
                   if (normalized)
                       return angle::FormatID::R32G32_SNORM;
                   return angle::FormatID::R32G32_SSCALED;
               case 3:
                   if (pureInteger)
                       return angle::FormatID::R32G32B32_SINT;
                   if (normalized)
                       return angle::FormatID::R32G32B32_SNORM;
                   return angle::FormatID::R32G32B32_SSCALED;
               case 4:
                   if (pureInteger)
                       return angle::FormatID::R32G32B32A32_SINT;
                   if (normalized)
                       return angle::FormatID::R32G32B32A32_SNORM;
                   return angle::FormatID::R32G32B32A32_SSCALED;
               default:
                   UNREACHABLE();
                   return angle::FormatID::NONE;
           }
       case VertexAttribType::UnsignedInt:
           switch (components)
           {
               case 1:
                   if (pureInteger)
                       return angle::FormatID::R32_UINT;
                   if (normalized)
                       return angle::FormatID::R32_UNORM;
                   return angle::FormatID::R32_USCALED;
               case 2:
                   if (pureInteger)
                       return angle::FormatID::R32G32_UINT;
                   if (normalized)
                       return angle::FormatID::R32G32_UNORM;
                   return angle::FormatID::R32G32_USCALED;
               case 3:
                   if (pureInteger)
                       return angle::FormatID::R32G32B32_UINT;
                   if (normalized)
                       return angle::FormatID::R32G32B32_UNORM;
                   return angle::FormatID::R32G32B32_USCALED;
               case 4:
                   if (pureInteger)
                       return angle::FormatID::R32G32B32A32_UINT;
                   if (normalized)
                       return angle::FormatID::R32G32B32A32_UNORM;
                   return angle::FormatID::R32G32B32A32_USCALED;
               default:
                   UNREACHABLE();
                   return angle::FormatID::NONE;
           }
       case VertexAttribType::Float:
           switch (components)
           {
               case 1:
                   return angle::FormatID::R32_FLOAT;
               case 2:
                   return angle::FormatID::R32G32_FLOAT;
               case 3:
                   return angle::FormatID::R32G32B32_FLOAT;
               case 4:
                   return angle::FormatID::R32G32B32A32_FLOAT;
               default:
                   UNREACHABLE();
                   return angle::FormatID::NONE;
           }
       case VertexAttribType::HalfFloat:
       case VertexAttribType::HalfFloatOES:
           switch (components)
           {
               case 1:
                   return angle::FormatID::R16_FLOAT;
               case 2:
                   return angle::FormatID::R16G16_FLOAT;
               case 3:
                   return angle::FormatID::R16G16B16_FLOAT;
               case 4:
                   return angle::FormatID::R16G16B16A16_FLOAT;
               default:
                   UNREACHABLE();
                   return angle::FormatID::NONE;
           }
       case VertexAttribType::Fixed:
           switch (components)
           {
               case 1:
                   return angle::FormatID::R32_FIXED;
               case 2:
                   return angle::FormatID::R32G32_FIXED;
               case 3:
                   return angle::FormatID::R32G32B32_FIXED;
               case 4:
                   return angle::FormatID::R32G32B32A32_FIXED;
               default:
                   UNREACHABLE();
                   return angle::FormatID::NONE;
           }
       case VertexAttribType::Int2101010:
           if (pureInteger)
               return angle::FormatID::R10G10B10A2_SINT;
           if (normalized)
               return angle::FormatID::R10G10B10A2_SNORM;
           return angle::FormatID::R10G10B10A2_SSCALED;
       case VertexAttribType::UnsignedInt2101010:
           if (pureInteger)
               return angle::FormatID::R10G10B10A2_UINT;
           if (normalized)
               return angle::FormatID::R10G10B10A2_UNORM;
           return angle::FormatID::R10G10B10A2_USCALED;
       case VertexAttribType::Int1010102:
           switch (components)
           {
               case 3:
                   if (pureInteger)
                       return angle::FormatID::X2R10G10B10_SINT_VERTEX;
                   if (normalized)
                       return angle::FormatID::X2R10G10B10_SNORM_VERTEX;
                   return angle::FormatID::X2R10G10B10_SSCALED_VERTEX;
               case 4:
                   if (pureInteger)
                       return angle::FormatID::A2R10G10B10_SINT_VERTEX;
                   if (normalized)
                       return angle::FormatID::A2R10G10B10_SNORM_VERTEX;
                   return angle::FormatID::A2R10G10B10_SSCALED_VERTEX;
               default:
                   UNREACHABLE();
                   return angle::FormatID::NONE;
           }
       case VertexAttribType::UnsignedInt1010102:
           switch (components)
           {
               case 3:
                   if (pureInteger)
                       return angle::FormatID::X2R10G10B10_UINT_VERTEX;
                   if (normalized)
                       return angle::FormatID::X2R10G10B10_UNORM_VERTEX;
                   return angle::FormatID::X2R10G10B10_USCALED_VERTEX;

               case 4:
                   if (pureInteger)
                       return angle::FormatID::A2R10G10B10_UINT_VERTEX;
                   if (normalized)
                       return angle::FormatID::A2R10G10B10_UNORM_VERTEX;
                   return angle::FormatID::A2R10G10B10_USCALED_VERTEX;
               default:
                   UNREACHABLE();
                   return angle::FormatID::NONE;
           }
       default:
           UNREACHABLE();
           return angle::FormatID::NONE;
   }
}

angle::FormatID GetVertexFormatID(const VertexAttribute &attrib, VertexAttribType currentValueType)
{
   if (!attrib.enabled)
   {
       return GetCurrentValueFormatID(currentValueType);
   }
   return attrib.format->id;
}

angle::FormatID GetCurrentValueFormatID(VertexAttribType currentValueType)
{
   switch (currentValueType)
   {
       case VertexAttribType::Float:
           return angle::FormatID::R32G32B32A32_FLOAT;
       case VertexAttribType::Int:
           return angle::FormatID::R32G32B32A32_SINT;
       case VertexAttribType::UnsignedInt:
           return angle::FormatID::R32G32B32A32_UINT;
       default:
           UNREACHABLE();
           return angle::FormatID::NONE;
   }
}

const VertexFormat &GetVertexFormatFromID(angle::FormatID vertexFormatID)
{
   switch (vertexFormatID)
   {
       case angle::FormatID::R8_SSCALED:
       {
           static const VertexFormat format(GL_BYTE, GL_FALSE, 1, false);
           return format;
       }
       case angle::FormatID::R8_SNORM:
       {
           static const VertexFormat format(GL_BYTE, GL_TRUE, 1, false);
           return format;
       }
       case angle::FormatID::R8G8_SSCALED:
       {
           static const VertexFormat format(GL_BYTE, GL_FALSE, 2, false);
           return format;
       }
       case angle::FormatID::R8G8_SNORM:
       {
           static const VertexFormat format(GL_BYTE, GL_TRUE, 2, false);
           return format;
       }
       case angle::FormatID::R8G8B8_SSCALED:
       {
           static const VertexFormat format(GL_BYTE, GL_FALSE, 3, false);
           return format;
       }
       case angle::FormatID::R8G8B8_SNORM:
       {
           static const VertexFormat format(GL_BYTE, GL_TRUE, 3, false);
           return format;
       }
       case angle::FormatID::R8G8B8A8_SSCALED:
       {
           static const VertexFormat format(GL_BYTE, GL_FALSE, 4, false);
           return format;
       }
       case angle::FormatID::R8G8B8A8_SNORM:
       {
           static const VertexFormat format(GL_BYTE, GL_TRUE, 4, false);
           return format;
       }
       case angle::FormatID::R8_USCALED:
       {
           static const VertexFormat format(GL_UNSIGNED_BYTE, GL_FALSE, 1, false);
           return format;
       }
       case angle::FormatID::R8_UNORM:
       {
           static const VertexFormat format(GL_UNSIGNED_BYTE, GL_TRUE, 1, false);
           return format;
       }
       case angle::FormatID::R8G8_USCALED:
       {
           static const VertexFormat format(GL_UNSIGNED_BYTE, GL_FALSE, 2, false);
           return format;
       }
       case angle::FormatID::R8G8_UNORM:
       {
           static const VertexFormat format(GL_UNSIGNED_BYTE, GL_TRUE, 2, false);
           return format;
       }
       case angle::FormatID::R8G8B8_USCALED:
       {
           static const VertexFormat format(GL_UNSIGNED_BYTE, GL_FALSE, 3, false);
           return format;
       }
       case angle::FormatID::R8G8B8_UNORM:
       {
           static const VertexFormat format(GL_UNSIGNED_BYTE, GL_TRUE, 3, false);
           return format;
       }
       case angle::FormatID::R8G8B8A8_USCALED:
       {
           static const VertexFormat format(GL_UNSIGNED_BYTE, GL_FALSE, 4, false);
           return format;
       }
       case angle::FormatID::R8G8B8A8_UNORM:
       {
           static const VertexFormat format(GL_UNSIGNED_BYTE, GL_TRUE, 4, false);
           return format;
       }
       case angle::FormatID::R16_SSCALED:
       {
           static const VertexFormat format(GL_SHORT, GL_FALSE, 1, false);
           return format;
       }
       case angle::FormatID::R16_SNORM:
       {
           static const VertexFormat format(GL_SHORT, GL_TRUE, 1, false);
           return format;
       }
       case angle::FormatID::R16G16_SSCALED:
       {
           static const VertexFormat format(GL_SHORT, GL_FALSE, 2, false);
           return format;
       }
       case angle::FormatID::R16G16_SNORM:
       {
           static const VertexFormat format(GL_SHORT, GL_TRUE, 2, false);
           return format;
       }
       case angle::FormatID::R16G16B16_SSCALED:
       {
           static const VertexFormat format(GL_SHORT, GL_FALSE, 3, false);
           return format;
       }
       case angle::FormatID::R16G16B16_SNORM:
       {
           static const VertexFormat format(GL_SHORT, GL_TRUE, 3, false);
           return format;
       }
       case angle::FormatID::R16G16B16A16_SSCALED:
       {
           static const VertexFormat format(GL_SHORT, GL_FALSE, 4, false);
           return format;
       }
       case angle::FormatID::R16G16B16A16_SNORM:
       {
           static const VertexFormat format(GL_SHORT, GL_TRUE, 4, false);
           return format;
       }
       case angle::FormatID::R16_USCALED:
       {
           static const VertexFormat format(GL_UNSIGNED_SHORT, GL_FALSE, 1, false);
           return format;
       }
       case angle::FormatID::R16_UNORM:
       {
           static const VertexFormat format(GL_UNSIGNED_SHORT, GL_TRUE, 1, false);
           return format;
       }
       case angle::FormatID::R16G16_USCALED:
       {
           static const VertexFormat format(GL_UNSIGNED_SHORT, GL_FALSE, 2, false);
           return format;
       }
       case angle::FormatID::R16G16_UNORM:
       {
           static const VertexFormat format(GL_UNSIGNED_SHORT, GL_TRUE, 2, false);
           return format;
       }
       case angle::FormatID::R16G16B16_USCALED:
       {
           static const VertexFormat format(GL_UNSIGNED_SHORT, GL_FALSE, 3, false);
           return format;
       }
       case angle::FormatID::R16G16B16_UNORM:
       {
           static const VertexFormat format(GL_UNSIGNED_SHORT, GL_TRUE, 3, false);
           return format;
       }
       case angle::FormatID::R16G16B16A16_USCALED:
       {
           static const VertexFormat format(GL_UNSIGNED_SHORT, GL_FALSE, 4, false);
           return format;
       }
       case angle::FormatID::R16G16B16A16_UNORM:
       {
           static const VertexFormat format(GL_UNSIGNED_SHORT, GL_TRUE, 4, false);
           return format;
       }
       case angle::FormatID::R32_SSCALED:
       {
           static const VertexFormat format(GL_INT, GL_FALSE, 1, false);
           return format;
       }
       case angle::FormatID::R32_SNORM:
       {
           static const VertexFormat format(GL_INT, GL_TRUE, 1, false);
           return format;
       }
       case angle::FormatID::R32G32_SSCALED:
       {
           static const VertexFormat format(GL_INT, GL_FALSE, 2, false);
           return format;
       }
       case angle::FormatID::R32G32_SNORM:
       {
           static const VertexFormat format(GL_INT, GL_TRUE, 2, false);
           return format;
       }
       case angle::FormatID::R32G32B32_SSCALED:
       {
           static const VertexFormat format(GL_INT, GL_FALSE, 3, false);
           return format;
       }
       case angle::FormatID::R32G32B32_SNORM:
       {
           static const VertexFormat format(GL_INT, GL_TRUE, 3, false);
           return format;
       }
       case angle::FormatID::R32G32B32A32_SSCALED:
       {
           static const VertexFormat format(GL_INT, GL_FALSE, 4, false);
           return format;
       }
       case angle::FormatID::R32G32B32A32_SNORM:
       {
           static const VertexFormat format(GL_INT, GL_TRUE, 4, false);
           return format;
       }
       case angle::FormatID::R32_USCALED:
       {
           static const VertexFormat format(GL_UNSIGNED_INT, GL_FALSE, 1, false);
           return format;
       }
       case angle::FormatID::R32_UNORM:
       {
           static const VertexFormat format(GL_UNSIGNED_INT, GL_TRUE, 1, false);
           return format;
       }
       case angle::FormatID::R32G32_USCALED:
       {
           static const VertexFormat format(GL_UNSIGNED_INT, GL_FALSE, 2, false);
           return format;
       }
       case angle::FormatID::R32G32_UNORM:
       {
           static const VertexFormat format(GL_UNSIGNED_INT, GL_TRUE, 2, false);
           return format;
       }
       case angle::FormatID::R32G32B32_USCALED:
       {
           static const VertexFormat format(GL_UNSIGNED_INT, GL_FALSE, 3, false);
           return format;
       }
       case angle::FormatID::R32G32B32_UNORM:
       {
           static const VertexFormat format(GL_UNSIGNED_INT, GL_TRUE, 3, false);
           return format;
       }
       case angle::FormatID::R32G32B32A32_USCALED:
       {
           static const VertexFormat format(GL_UNSIGNED_INT, GL_FALSE, 4, false);
           return format;
       }
       case angle::FormatID::R32G32B32A32_UNORM:
       {
           static const VertexFormat format(GL_UNSIGNED_INT, GL_TRUE, 4, false);
           return format;
       }
       case angle::FormatID::R8_SINT:
       {
           static const VertexFormat format(GL_BYTE, GL_FALSE, 1, true);
           return format;
       }
       case angle::FormatID::R8G8_SINT:
       {
           static const VertexFormat format(GL_BYTE, GL_FALSE, 2, true);
           return format;
       }
       case angle::FormatID::R8G8B8_SINT:
       {
           static const VertexFormat format(GL_BYTE, GL_FALSE, 3, true);
           return format;
       }
       case angle::FormatID::R8G8B8A8_SINT:
       {
           static const VertexFormat format(GL_BYTE, GL_FALSE, 4, true);
           return format;
       }
       case angle::FormatID::R8_UINT:
       {
           static const VertexFormat format(GL_UNSIGNED_BYTE, GL_FALSE, 1, true);
           return format;
       }
       case angle::FormatID::R8G8_UINT:
       {
           static const VertexFormat format(GL_UNSIGNED_BYTE, GL_FALSE, 2, true);
           return format;
       }
       case angle::FormatID::R8G8B8_UINT:
       {
           static const VertexFormat format(GL_UNSIGNED_BYTE, GL_FALSE, 3, true);
           return format;
       }
       case angle::FormatID::R8G8B8A8_UINT:
       {
           static const VertexFormat format(GL_UNSIGNED_BYTE, GL_FALSE, 4, true);
           return format;
       }
       case angle::FormatID::R16_SINT:
       {
           static const VertexFormat format(GL_SHORT, GL_FALSE, 1, true);
           return format;
       }
       case angle::FormatID::R16G16_SINT:
       {
           static const VertexFormat format(GL_SHORT, GL_FALSE, 2, true);
           return format;
       }
       case angle::FormatID::R16G16B16_SINT:
       {
           static const VertexFormat format(GL_SHORT, GL_FALSE, 3, true);
           return format;
       }
       case angle::FormatID::R16G16B16A16_SINT:
       {
           static const VertexFormat format(GL_SHORT, GL_FALSE, 4, true);
           return format;
       }
       case angle::FormatID::R16_UINT:
       {
           static const VertexFormat format(GL_UNSIGNED_SHORT, GL_FALSE, 1, true);
           return format;
       }
       case angle::FormatID::R16G16_UINT:
       {
           static const VertexFormat format(GL_UNSIGNED_SHORT, GL_FALSE, 2, true);
           return format;
       }
       case angle::FormatID::R16G16B16_UINT:
       {
           static const VertexFormat format(GL_UNSIGNED_SHORT, GL_FALSE, 3, true);
           return format;
       }
       case angle::FormatID::R16G16B16A16_UINT:
       {
           static const VertexFormat format(GL_UNSIGNED_SHORT, GL_FALSE, 4, true);
           return format;
       }
       case angle::FormatID::R32_SINT:
       {
           static const VertexFormat format(GL_INT, GL_FALSE, 1, true);
           return format;
       }
       case angle::FormatID::R32G32_SINT:
       {
           static const VertexFormat format(GL_INT, GL_FALSE, 2, true);
           return format;
       }
       case angle::FormatID::R32G32B32_SINT:
       {
           static const VertexFormat format(GL_INT, GL_FALSE, 3, true);
           return format;
       }
       case angle::FormatID::R32G32B32A32_SINT:
       {
           static const VertexFormat format(GL_INT, GL_FALSE, 4, true);
           return format;
       }
       case angle::FormatID::R32_UINT:
       {
           static const VertexFormat format(GL_UNSIGNED_INT, GL_FALSE, 1, true);
           return format;
       }
       case angle::FormatID::R32G32_UINT:
       {
           static const VertexFormat format(GL_UNSIGNED_INT, GL_FALSE, 2, true);
           return format;
       }
       case angle::FormatID::R32G32B32_UINT:
       {
           static const VertexFormat format(GL_UNSIGNED_INT, GL_FALSE, 3, true);
           return format;
       }
       case angle::FormatID::R32G32B32A32_UINT:
       {
           static const VertexFormat format(GL_UNSIGNED_INT, GL_FALSE, 4, true);
           return format;
       }
       case angle::FormatID::R32_FIXED:
       {
           static const VertexFormat format(GL_FIXED, GL_FALSE, 1, false);
           return format;
       }
       case angle::FormatID::R32G32_FIXED:
       {
           static const VertexFormat format(GL_FIXED, GL_FALSE, 2, false);
           return format;
       }
       case angle::FormatID::R32G32B32_FIXED:
       {
           static const VertexFormat format(GL_FIXED, GL_FALSE, 3, false);
           return format;
       }
       case angle::FormatID::R32G32B32A32_FIXED:
       {
           static const VertexFormat format(GL_FIXED, GL_FALSE, 4, false);
           return format;
       }
       case angle::FormatID::R16_FLOAT:
       {
           static const VertexFormat format(GL_HALF_FLOAT, GL_FALSE, 1, false);
           return format;
       }
       case angle::FormatID::R16G16_FLOAT:
       {
           static const VertexFormat format(GL_HALF_FLOAT, GL_FALSE, 2, false);
           return format;
       }
       case angle::FormatID::R16G16B16_FLOAT:
       {
           static const VertexFormat format(GL_HALF_FLOAT, GL_FALSE, 3, false);
           return format;
       }
       case angle::FormatID::R16G16B16A16_FLOAT:
       {
           static const VertexFormat format(GL_HALF_FLOAT, GL_FALSE, 4, false);
           return format;
       }
       case angle::FormatID::R32_FLOAT:
       {
           static const VertexFormat format(GL_FLOAT, GL_FALSE, 1, false);
           return format;
       }
       case angle::FormatID::R32G32_FLOAT:
       {
           static const VertexFormat format(GL_FLOAT, GL_FALSE, 2, false);
           return format;
       }
       case angle::FormatID::R32G32B32_FLOAT:
       {
           static const VertexFormat format(GL_FLOAT, GL_FALSE, 3, false);
           return format;
       }
       case angle::FormatID::R32G32B32A32_FLOAT:
       {
           static const VertexFormat format(GL_FLOAT, GL_FALSE, 4, false);
           return format;
       }
       case angle::FormatID::R10G10B10A2_SSCALED:
       {
           static const VertexFormat format(GL_INT_2_10_10_10_REV, GL_FALSE, 4, false);
           return format;
       }
       case angle::FormatID::R10G10B10A2_USCALED:
       {
           static const VertexFormat format(GL_UNSIGNED_INT_2_10_10_10_REV, GL_FALSE, 4, false);
           return format;
       }
       case angle::FormatID::R10G10B10A2_SNORM:
       {
           static const VertexFormat format(GL_INT_2_10_10_10_REV, GL_TRUE, 4, false);
           return format;
       }
       case angle::FormatID::R10G10B10A2_UNORM:
       {
           static const VertexFormat format(GL_UNSIGNED_INT_2_10_10_10_REV, GL_TRUE, 4, false);
           return format;
       }
       case angle::FormatID::R10G10B10A2_SINT:
       {
           static const VertexFormat format(GL_INT_2_10_10_10_REV, GL_FALSE, 4, true);
           return format;
       }
       case angle::FormatID::R10G10B10A2_UINT:
       {
           static const VertexFormat format(GL_UNSIGNED_INT_2_10_10_10_REV, GL_FALSE, 4, true);
           return format;
       }
       case angle::FormatID::A2R10G10B10_SSCALED_VERTEX:
       {
           static const VertexFormat format(GL_INT_10_10_10_2_OES, GL_FALSE, 4, false);
           return format;
       }
       case angle::FormatID::A2R10G10B10_USCALED_VERTEX:
       {
           static const VertexFormat format(GL_UNSIGNED_INT_10_10_10_2_OES, GL_FALSE, 4, false);
           return format;
       }
       case angle::FormatID::A2R10G10B10_SNORM_VERTEX:
       {
           static const VertexFormat format(GL_INT_10_10_10_2_OES, GL_TRUE, 4, false);
           return format;
       }
       case angle::FormatID::A2R10G10B10_UNORM_VERTEX:
       {
           static const VertexFormat format(GL_UNSIGNED_INT_10_10_10_2_OES, GL_TRUE, 4, false);
           return format;
       }
       case angle::FormatID::A2R10G10B10_SINT_VERTEX:
       {
           static const VertexFormat format(GL_INT_10_10_10_2_OES, GL_FALSE, 4, true);
           return format;
       }
       case angle::FormatID::A2R10G10B10_UINT_VERTEX:
       {
           static const VertexFormat format(GL_UNSIGNED_INT_10_10_10_2_OES, GL_FALSE, 4, true);
           return format;
       }
       case angle::FormatID::X2R10G10B10_SSCALED_VERTEX:
       {
           static const VertexFormat format(GL_INT_10_10_10_2_OES, GL_FALSE, 4, false);
           return format;
       }
       case angle::FormatID::X2R10G10B10_USCALED_VERTEX:
       {
           static const VertexFormat format(GL_UNSIGNED_INT_10_10_10_2_OES, GL_FALSE, 4, false);
           return format;
       }
       case angle::FormatID::X2R10G10B10_SNORM_VERTEX:
       {
           static const VertexFormat format(GL_INT_10_10_10_2_OES, GL_TRUE, 4, false);
           return format;
       }
       case angle::FormatID::X2R10G10B10_UNORM_VERTEX:
       {
           static const VertexFormat format(GL_UNSIGNED_INT_10_10_10_2_OES, GL_TRUE, 4, false);
           return format;
       }
       case angle::FormatID::X2R10G10B10_SINT_VERTEX:
       {
           static const VertexFormat format(GL_INT_10_10_10_2_OES, GL_FALSE, 4, true);
           return format;
       }
       default:
       {
           static const VertexFormat format(GL_NONE, GL_FALSE, 0, false);
           return format;
       }
   }
}

size_t GetVertexFormatSize(angle::FormatID vertexFormatID)
{
   switch (vertexFormatID)
   {
       case angle::FormatID::R8_SSCALED:
       case angle::FormatID::R8_SNORM:
       case angle::FormatID::R8_USCALED:
       case angle::FormatID::R8_UNORM:
       case angle::FormatID::R8_SINT:
       case angle::FormatID::R8_UINT:
           return 1;

       case angle::FormatID::R8G8_SSCALED:
       case angle::FormatID::R8G8_SNORM:
       case angle::FormatID::R8G8_USCALED:
       case angle::FormatID::R8G8_UNORM:
       case angle::FormatID::R8G8_SINT:
       case angle::FormatID::R8G8_UINT:
       case angle::FormatID::R16_SSCALED:
       case angle::FormatID::R16_SNORM:
       case angle::FormatID::R16_USCALED:
       case angle::FormatID::R16_UNORM:
       case angle::FormatID::R16_SINT:
       case angle::FormatID::R16_UINT:
       case angle::FormatID::R16_FLOAT:
           return 2;

       case angle::FormatID::R8G8B8_SSCALED:
       case angle::FormatID::R8G8B8_SNORM:
       case angle::FormatID::R8G8B8_USCALED:
       case angle::FormatID::R8G8B8_UNORM:
       case angle::FormatID::R8G8B8_SINT:
       case angle::FormatID::R8G8B8_UINT:
           return 3;

       case angle::FormatID::R8G8B8A8_SSCALED:
       case angle::FormatID::R8G8B8A8_SNORM:
       case angle::FormatID::R8G8B8A8_USCALED:
       case angle::FormatID::R8G8B8A8_UNORM:
       case angle::FormatID::R8G8B8A8_SINT:
       case angle::FormatID::R8G8B8A8_UINT:
       case angle::FormatID::R16G16_SSCALED:
       case angle::FormatID::R16G16_SNORM:
       case angle::FormatID::R16G16_USCALED:
       case angle::FormatID::R16G16_UNORM:
       case angle::FormatID::R16G16_SINT:
       case angle::FormatID::R16G16_UINT:
       case angle::FormatID::R32_SSCALED:
       case angle::FormatID::R32_SNORM:
       case angle::FormatID::R32_USCALED:
       case angle::FormatID::R32_UNORM:
       case angle::FormatID::R32_SINT:
       case angle::FormatID::R32_UINT:
       case angle::FormatID::R16G16_FLOAT:
       case angle::FormatID::R32_FIXED:
       case angle::FormatID::R32_FLOAT:
       case angle::FormatID::R10G10B10A2_SSCALED:
       case angle::FormatID::R10G10B10A2_USCALED:
       case angle::FormatID::R10G10B10A2_SNORM:
       case angle::FormatID::R10G10B10A2_UNORM:
       case angle::FormatID::R10G10B10A2_SINT:
       case angle::FormatID::R10G10B10A2_UINT:
       case angle::FormatID::A2R10G10B10_SSCALED_VERTEX:
       case angle::FormatID::A2R10G10B10_USCALED_VERTEX:
       case angle::FormatID::A2R10G10B10_SINT_VERTEX:
       case angle::FormatID::A2R10G10B10_UINT_VERTEX:
       case angle::FormatID::A2R10G10B10_SNORM_VERTEX:
       case angle::FormatID::A2R10G10B10_UNORM_VERTEX:
       case angle::FormatID::X2R10G10B10_SSCALED_VERTEX:
       case angle::FormatID::X2R10G10B10_USCALED_VERTEX:
       case angle::FormatID::X2R10G10B10_SINT_VERTEX:
       case angle::FormatID::X2R10G10B10_UINT_VERTEX:
       case angle::FormatID::X2R10G10B10_SNORM_VERTEX:
       case angle::FormatID::X2R10G10B10_UNORM_VERTEX:
           return 4;

       case angle::FormatID::R16G16B16_SSCALED:
       case angle::FormatID::R16G16B16_SNORM:
       case angle::FormatID::R16G16B16_USCALED:
       case angle::FormatID::R16G16B16_UNORM:
       case angle::FormatID::R16G16B16_SINT:
       case angle::FormatID::R16G16B16_UINT:
       case angle::FormatID::R16G16B16_FLOAT:
           return 6;

       case angle::FormatID::R16G16B16A16_SSCALED:
       case angle::FormatID::R16G16B16A16_SNORM:
       case angle::FormatID::R16G16B16A16_USCALED:
       case angle::FormatID::R16G16B16A16_UNORM:
       case angle::FormatID::R16G16B16A16_SINT:
       case angle::FormatID::R16G16B16A16_UINT:
       case angle::FormatID::R32G32_SSCALED:
       case angle::FormatID::R32G32_SNORM:
       case angle::FormatID::R32G32_USCALED:
       case angle::FormatID::R32G32_UNORM:
       case angle::FormatID::R32G32_SINT:
       case angle::FormatID::R32G32_UINT:
       case angle::FormatID::R16G16B16A16_FLOAT:
       case angle::FormatID::R32G32_FIXED:
       case angle::FormatID::R32G32_FLOAT:
           return 8;

       case angle::FormatID::R32G32B32_SSCALED:
       case angle::FormatID::R32G32B32_SNORM:
       case angle::FormatID::R32G32B32_USCALED:
       case angle::FormatID::R32G32B32_UNORM:
       case angle::FormatID::R32G32B32_SINT:
       case angle::FormatID::R32G32B32_UINT:
       case angle::FormatID::R32G32B32_FIXED:
       case angle::FormatID::R32G32B32_FLOAT:
           return 12;

       case angle::FormatID::R32G32B32A32_SSCALED:
       case angle::FormatID::R32G32B32A32_SNORM:
       case angle::FormatID::R32G32B32A32_USCALED:
       case angle::FormatID::R32G32B32A32_UNORM:
       case angle::FormatID::R32G32B32A32_SINT:
       case angle::FormatID::R32G32B32A32_UINT:
       case angle::FormatID::R32G32B32A32_FIXED:
       case angle::FormatID::R32G32B32A32_FLOAT:
           return 16;

       case angle::FormatID::NONE:
       default:
           UNREACHABLE();
           return 0;
   }
}

angle::FormatID ConvertFormatSignedness(const angle::Format &format)
{
   switch (format.id)
   {
       // 1 byte signed to unsigned
       case angle::FormatID::R8_SINT:
           return angle::FormatID::R8_UINT;
       case angle::FormatID::R8_SNORM:
           return angle::FormatID::R8_UNORM;
       case angle::FormatID::R8_SSCALED:
           return angle::FormatID::R8_USCALED;
       case angle::FormatID::R8G8_SINT:
           return angle::FormatID::R8G8_UINT;
       case angle::FormatID::R8G8_SNORM:
           return angle::FormatID::R8G8_UNORM;
       case angle::FormatID::R8G8_SSCALED:
           return angle::FormatID::R8G8_USCALED;
       case angle::FormatID::R8G8B8_SINT:
           return angle::FormatID::R8G8B8_UINT;
       case angle::FormatID::R8G8B8_SNORM:
           return angle::FormatID::R8G8B8_UNORM;
       case angle::FormatID::R8G8B8_SSCALED:
           return angle::FormatID::R8G8B8_USCALED;
       case angle::FormatID::R8G8B8A8_SINT:
           return angle::FormatID::R8G8B8A8_UINT;
       case angle::FormatID::R8G8B8A8_SNORM:
           return angle::FormatID::R8G8B8A8_UNORM;
       case angle::FormatID::R8G8B8A8_SSCALED:
           return angle::FormatID::R8G8B8A8_USCALED;
       // 1 byte unsigned to signed
       case angle::FormatID::R8_UINT:
           return angle::FormatID::R8_SINT;
       case angle::FormatID::R8_UNORM:
           return angle::FormatID::R8_SNORM;
       case angle::FormatID::R8_USCALED:
           return angle::FormatID::R8_SSCALED;
       case angle::FormatID::R8G8_UINT:
           return angle::FormatID::R8G8_SINT;
       case angle::FormatID::R8G8_UNORM:
           return angle::FormatID::R8G8_SNORM;
       case angle::FormatID::R8G8_USCALED:
           return angle::FormatID::R8G8_SSCALED;
       case angle::FormatID::R8G8B8_UINT:
           return angle::FormatID::R8G8B8_SINT;
       case angle::FormatID::R8G8B8_UNORM:
           return angle::FormatID::R8G8B8_SNORM;
       case angle::FormatID::R8G8B8_USCALED:
           return angle::FormatID::R8G8B8_SSCALED;
       case angle::FormatID::R8G8B8A8_UINT:
           return angle::FormatID::R8G8B8A8_SINT;
       case angle::FormatID::R8G8B8A8_UNORM:
           return angle::FormatID::R8G8B8A8_SNORM;
       case angle::FormatID::R8G8B8A8_USCALED:
           return angle::FormatID::R8G8B8A8_SSCALED;
       // 2 byte signed to unsigned
       case angle::FormatID::R16_SINT:
           return angle::FormatID::R16_UINT;
       case angle::FormatID::R16_SNORM:
           return angle::FormatID::R16_UNORM;
       case angle::FormatID::R16_SSCALED:
           return angle::FormatID::R16_USCALED;
       case angle::FormatID::R16G16_SINT:
           return angle::FormatID::R16G16_UINT;
       case angle::FormatID::R16G16_SNORM:
           return angle::FormatID::R16G16_UNORM;
       case angle::FormatID::R16G16_SSCALED:
           return angle::FormatID::R16G16_USCALED;
       case angle::FormatID::R16G16B16_SINT:
           return angle::FormatID::R16G16B16_UINT;
       case angle::FormatID::R16G16B16_SNORM:
           return angle::FormatID::R16G16B16_UNORM;
       case angle::FormatID::R16G16B16_SSCALED:
           return angle::FormatID::R16G16B16_USCALED;
       case angle::FormatID::R16G16B16A16_SINT:
           return angle::FormatID::R16G16B16A16_UINT;
       case angle::FormatID::R16G16B16A16_SNORM:
           return angle::FormatID::R16G16B16A16_UNORM;
       case angle::FormatID::R16G16B16A16_SSCALED:
           return angle::FormatID::R16G16B16A16_USCALED;
       // 2 byte unsigned to signed
       case angle::FormatID::R16_UINT:
           return angle::FormatID::R16_SINT;
       case angle::FormatID::R16_UNORM:
           return angle::FormatID::R16_SNORM;
       case angle::FormatID::R16_USCALED:
           return angle::FormatID::R16_SSCALED;
       case angle::FormatID::R16G16_UINT:
           return angle::FormatID::R16G16_SINT;
       case angle::FormatID::R16G16_UNORM:
           return angle::FormatID::R16G16_SNORM;
       case angle::FormatID::R16G16_USCALED:
           return angle::FormatID::R16G16_SSCALED;
       case angle::FormatID::R16G16B16_UINT:
           return angle::FormatID::R16G16B16_SINT;
       case angle::FormatID::R16G16B16_UNORM:
           return angle::FormatID::R16G16B16_SNORM;
       case angle::FormatID::R16G16B16_USCALED:
           return angle::FormatID::R16G16B16_SSCALED;
       case angle::FormatID::R16G16B16A16_UINT:
           return angle::FormatID::R16G16B16A16_SINT;
       case angle::FormatID::R16G16B16A16_UNORM:
           return angle::FormatID::R16G16B16A16_SNORM;
       case angle::FormatID::R16G16B16A16_USCALED:
           return angle::FormatID::R16G16B16A16_SSCALED;
       // 4 byte signed to unsigned
       case angle::FormatID::R32_SINT:
           return angle::FormatID::R32_UINT;
       case angle::FormatID::R32_SNORM:
           return angle::FormatID::R32_UNORM;
       case angle::FormatID::R32_SSCALED:
           return angle::FormatID::R32_USCALED;
       case angle::FormatID::R32G32_SINT:
           return angle::FormatID::R32G32_UINT;
       case angle::FormatID::R32G32_SNORM:
           return angle::FormatID::R32G32_UNORM;
       case angle::FormatID::R32G32_SSCALED:
           return angle::FormatID::R32G32_USCALED;
       case angle::FormatID::R32G32B32_SINT:
           return angle::FormatID::R32G32B32_UINT;
       case angle::FormatID::R32G32B32_SNORM:
           return angle::FormatID::R32G32B32_UNORM;
       case angle::FormatID::R32G32B32_SSCALED:
           return angle::FormatID::R32G32B32_USCALED;
       case angle::FormatID::R32G32B32A32_SINT:
           return angle::FormatID::R32G32B32A32_UINT;
       case angle::FormatID::R32G32B32A32_SNORM:
           return angle::FormatID::R32G32B32A32_UNORM;
       case angle::FormatID::R32G32B32A32_SSCALED:
           return angle::FormatID::R32G32B32A32_USCALED;
       // 4 byte unsigned to signed
       case angle::FormatID::R32_UINT:
           return angle::FormatID::R32_SINT;
       case angle::FormatID::R32_UNORM:
           return angle::FormatID::R32_SNORM;
       case angle::FormatID::R32_USCALED:
           return angle::FormatID::R32_SSCALED;
       case angle::FormatID::R32G32_UINT:
           return angle::FormatID::R32G32_SINT;
       case angle::FormatID::R32G32_UNORM:
           return angle::FormatID::R32G32_SNORM;
       case angle::FormatID::R32G32_USCALED:
           return angle::FormatID::R32G32_SSCALED;
       case angle::FormatID::R32G32B32_UINT:
           return angle::FormatID::R32G32B32_SINT;
       case angle::FormatID::R32G32B32_UNORM:
           return angle::FormatID::R32G32B32_SNORM;
       case angle::FormatID::R32G32B32_USCALED:
           return angle::FormatID::R32G32B32_SSCALED;
       case angle::FormatID::R32G32B32A32_UINT:
           return angle::FormatID::R32G32B32A32_SINT;
       case angle::FormatID::R32G32B32A32_UNORM:
           return angle::FormatID::R32G32B32A32_SNORM;
       case angle::FormatID::R32G32B32A32_USCALED:
           return angle::FormatID::R32G32B32A32_SSCALED;
       // 1010102 signed to unsigned
       case angle::FormatID::R10G10B10A2_SINT:
           return angle::FormatID::R10G10B10A2_UINT;
       case angle::FormatID::R10G10B10A2_SSCALED:
           return angle::FormatID::R10G10B10A2_USCALED;
       case angle::FormatID::R10G10B10A2_SNORM:
           return angle::FormatID::R10G10B10A2_UNORM;
       // 1010102 unsigned to signed
       case angle::FormatID::R10G10B10A2_UINT:
           return angle::FormatID::R10G10B10A2_SINT;
       case angle::FormatID::R10G10B10A2_USCALED:
           return angle::FormatID::R10G10B10A2_SSCALED;
       case angle::FormatID::R10G10B10A2_UNORM:
           return angle::FormatID::R10G10B10A2_SNORM;
       default:
           UNREACHABLE();
           return angle::FormatID::NONE;
   }
}

bool ValidES3InternalFormat(GLenum internalFormat)
{
   const InternalFormatInfoMap &formatMap = GetInternalFormatMap();
   return internalFormat != GL_NONE && formatMap.find(internalFormat) != formatMap.end();
}

VertexFormat::VertexFormat(GLenum typeIn,
                          GLboolean normalizedIn,
                          GLuint componentsIn,
                          bool pureIntegerIn)
   : type(typeIn), normalized(normalizedIn), components(componentsIn), pureInteger(pureIntegerIn)
{
   // float -> !normalized
   ASSERT(!(type == GL_FLOAT || type == GL_HALF_FLOAT || type == GL_FIXED) ||
          normalized == GL_FALSE);
}
}  // namespace gl