dom/canvas/WebGLVertexArrayFake.cpp

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 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 "WebGLVertexArrayFake.h"
   7
   8 #include "WebGLContext.h"
   9 #include "GLContext.h"
  10
  11 namespace mozilla {
  12
  13 void
  14 WebGLVertexArrayFake::BindVertexArrayImpl()
  15 {
  16     // Go through and re-bind all buffers and setup all
  17     // vertex attribute pointers
  18     gl::GLContext* gl = mContext->gl;
  19
  20     WebGLRefPtr<WebGLVertexArray> prevVertexArray = mContext->mBoundVertexArray;
  21
  22     mContext->mBoundVertexArray = this;
  23
  24     WebGLRefPtr<WebGLBuffer> prevBuffer = mContext->mBoundArrayBuffer;
  25     mContext->BindBuffer(LOCAL_GL_ELEMENT_ARRAY_BUFFER, mElementArrayBuffer);
  26
  27     for (size_t i = 0; i < mAttribs.Length(); ++i) {
  28         const WebGLVertexAttribData& vd = mAttribs[i];
  29
  30         mContext->BindBuffer(LOCAL_GL_ARRAY_BUFFER, vd.buf);
  31
  32         gl->fVertexAttribPointer(i, vd.size, vd.type, vd.normalized,
  33                                  vd.stride, reinterpret_cast<void*>(vd.byteOffset));
  34
  35         if (vd.enabled) {
  36             gl->fEnableVertexAttribArray(i);
  37         } else {
  38             gl->fDisableVertexAttribArray(i);
  39         }
  40     }
  41
  42     for (size_t i = mAttribs.Length(); i < prevVertexArray->mAttribs.Length(); ++i) {
  43         const WebGLVertexAttribData& vd = prevVertexArray->mAttribs[i];
  44
  45         if (vd.enabled) {
  46             gl->fDisableVertexAttribArray(i);
  47         }
  48     }
  49
  50     mContext->BindBuffer(LOCAL_GL_ARRAY_BUFFER, prevBuffer);
  51 }
  52
  53 } // namespace mozilla
  54