tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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SharedSurfaceIO.cpp (3382B)

      1 /* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 4; -*- */
      2 /* This Source Code Form is subject to the terms of the Mozilla Public
      3 * License, v. 2.0. If a copy of the MPL was not distributed with this
      4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      5 
      6 #include "SharedSurfaceIO.h"
      7 
      8 #include "GLContextCGL.h"
      9 #include "MozFramebuffer.h"
     10 #include "mozilla/gfx/MacIOSurface.h"
     11 #include "mozilla/layers/LayersSurfaces.h"  // for SurfaceDescriptor, etc
     12 #include "mozilla/layers/LayersTypes.h"
     13 #include "ScopedGLHelpers.h"
     14 
     15 namespace mozilla {
     16 namespace gl {
     17 
     18 // -
     19 // Factory
     20 
     21 SurfaceFactory_IOSurface::SurfaceFactory_IOSurface(GLContext& gl)
     22    : SurfaceFactory({&gl, SharedSurfaceType::IOSurface,
     23                      layers::TextureType::MacIOSurface, true}),
     24      mMaxDims(gfx::IntSize::Truncate(MacIOSurface::GetMaxWidth(),
     25                                      MacIOSurface::GetMaxHeight())) {}
     26 
     27 // -
     28 // Surface
     29 
     30 static bool BackTextureWithIOSurf(GLContext* const gl, const GLuint tex,
     31                                  MacIOSurface* const ioSurf) {
     32  MOZ_ASSERT(gl->IsCurrent());
     33 
     34  ScopedBindTexture texture(gl, tex, LOCAL_GL_TEXTURE_RECTANGLE_ARB);
     35 
     36  gl->fTexParameteri(LOCAL_GL_TEXTURE_RECTANGLE_ARB,
     37                     LOCAL_GL_TEXTURE_MIN_FILTER, LOCAL_GL_LINEAR);
     38  gl->fTexParameteri(LOCAL_GL_TEXTURE_RECTANGLE_ARB,
     39                     LOCAL_GL_TEXTURE_MAG_FILTER, LOCAL_GL_LINEAR);
     40  gl->fTexParameteri(LOCAL_GL_TEXTURE_RECTANGLE_ARB, LOCAL_GL_TEXTURE_WRAP_S,
     41                     LOCAL_GL_CLAMP_TO_EDGE);
     42  gl->fTexParameteri(LOCAL_GL_TEXTURE_RECTANGLE_ARB, LOCAL_GL_TEXTURE_WRAP_T,
     43                     LOCAL_GL_CLAMP_TO_EDGE);
     44 
     45  return ioSurf->BindTexImage(gl, 0);
     46 }
     47 
     48 /*static*/
     49 UniquePtr<SharedSurface_IOSurface> SharedSurface_IOSurface::Create(
     50    const SharedSurfaceDesc& desc) {
     51  const auto& size = desc.size;
     52  const RefPtr<MacIOSurface> ioSurf =
     53      MacIOSurface::CreateIOSurface(size.width, size.height, true);
     54  if (!ioSurf) {
     55    NS_WARNING("Failed to create MacIOSurface.");
     56    return nullptr;
     57  }
     58 
     59  ioSurf->SetColorSpace(desc.colorSpace);
     60 
     61  // -
     62 
     63  auto tex = MakeUnique<Texture>(*desc.gl);
     64  if (!BackTextureWithIOSurf(desc.gl, tex->name, ioSurf)) {
     65    return nullptr;
     66  }
     67 
     68  const GLenum target = LOCAL_GL_TEXTURE_RECTANGLE;
     69  auto fb = MozFramebuffer::CreateForBacking(desc.gl, desc.size, 0, false,
     70                                             target, tex->name);
     71  if (!fb) return nullptr;
     72 
     73  return AsUnique(
     74      new SharedSurface_IOSurface(desc, std::move(fb), std::move(tex), ioSurf));
     75 }
     76 
     77 SharedSurface_IOSurface::SharedSurface_IOSurface(
     78    const SharedSurfaceDesc& desc, UniquePtr<MozFramebuffer> fb,
     79    UniquePtr<Texture> tex, const RefPtr<MacIOSurface>& ioSurf)
     80    : SharedSurface(desc, std::move(fb)),
     81      mTex(std::move(tex)),
     82      mIOSurf(ioSurf) {}
     83 
     84 SharedSurface_IOSurface::~SharedSurface_IOSurface() = default;
     85 
     86 void SharedSurface_IOSurface::ProducerReleaseImpl() {
     87  const auto& gl = mDesc.gl;
     88  if (!gl) return;
     89  gl->MakeCurrent();
     90  gl->fFlush();
     91 }
     92 
     93 Maybe<layers::SurfaceDescriptor>
     94 SharedSurface_IOSurface::ToSurfaceDescriptor() {
     95  const bool isOpaque = false;  // RGBA
     96  return Some(layers::SurfaceDescriptorMacIOSurface(
     97      mIOSurf->GetIOSurfaceID(), isOpaque, mIOSurf->GetYUVColorSpace(),
     98      (layers::GpuFence*)nullptr));
     99 }
    100 
    101 }  // namespace gl
    102 }  // namespace mozilla