tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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WebGLVertexArray.cpp (2139B)

      1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      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 "WebGLVertexArray.h"
      7 
      8 #include "GLContext.h"
      9 #include "WebGLBuffer.h"
     10 #include "WebGLContext.h"
     11 #include "WebGLVertexArrayFake.h"
     12 #include "WebGLVertexArrayGL.h"
     13 #include "mozilla/dom/WebGLRenderingContextBinding.h"
     14 
     15 namespace mozilla {
     16 
     17 WebGLVertexArray* WebGLVertexArray::Create(WebGLContext* webgl) {
     18  if (webgl->gl->IsSupported(gl::GLFeature::vertex_array_object)) {
     19    return new WebGLVertexArrayGL(webgl);
     20  }
     21  return new WebGLVertexArrayFake(webgl);
     22 }
     23 
     24 WebGLVertexArray::WebGLVertexArray(WebGLContext* const webgl)
     25    : WebGLContextBoundObject(webgl) {
     26  const webgl::VertAttribPointerDesc defaultDesc;
     27  const webgl::VertAttribPointerCalculated defaultCalc;
     28  for (const auto i : IntegerRange(mContext->MaxVertexAttribs())) {
     29    AttribPointer(i, nullptr, defaultDesc, defaultCalc);
     30  }
     31 }
     32 
     33 WebGLVertexArray::~WebGLVertexArray() = default;
     34 
     35 Maybe<double> WebGLVertexArray::GetVertexAttrib(const uint32_t index,
     36                                                const GLenum pname) const {
     37  const auto& binding = mBindings[index];
     38  const auto& desc = mDescs[index];
     39 
     40  switch (pname) {
     41    case LOCAL_GL_VERTEX_ATTRIB_ARRAY_STRIDE:
     42      return Some(desc.byteStrideOrZero);
     43 
     44    case LOCAL_GL_VERTEX_ATTRIB_ARRAY_SIZE:
     45      return Some(desc.channels);
     46 
     47    case LOCAL_GL_VERTEX_ATTRIB_ARRAY_TYPE:
     48      return Some(desc.type);
     49 
     50    case LOCAL_GL_VERTEX_ATTRIB_ARRAY_INTEGER:
     51      return Some(desc.intFunc);
     52 
     53    case LOCAL_GL_VERTEX_ATTRIB_ARRAY_DIVISOR:
     54      return Some(binding.layout.divisor);
     55 
     56    case LOCAL_GL_VERTEX_ATTRIB_ARRAY_ENABLED:
     57      return Some(binding.layout.isArray);
     58 
     59    case LOCAL_GL_VERTEX_ATTRIB_ARRAY_NORMALIZED:
     60      return Some(desc.normalized);
     61 
     62    case LOCAL_GL_VERTEX_ATTRIB_ARRAY_POINTER:
     63      return Some(binding.layout.byteOffset);
     64 
     65    default:
     66      return {};
     67  }
     68 }
     69 
     70 }  // namespace mozilla