dom/canvas/WebGLBuffer.cpp

   1 /* -*- Mode: C++; tab-width: 20; 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 "WebGLBuffer.h"
   7
   8 #include "GLContext.h"
   9 #include "mozilla/dom/WebGLRenderingContextBinding.h"
  10 #include "WebGLContext.h"
  11 #include "WebGLElementArrayCache.h"
  12
  13 using namespace mozilla;
  14
  15 WebGLBuffer::WebGLBuffer(WebGLContext *context)
  16     : WebGLBindableName()
  17     , WebGLContextBoundObject(context)
  18     , mByteLength(0)
  19 {
  20     SetIsDOMBinding();
  21     mContext->MakeContextCurrent();
  22     mContext->gl->fGenBuffers(1, &mGLName);
  23     mContext->mBuffers.insertBack(this);
  24 }
  25
  26 WebGLBuffer::~WebGLBuffer() {
  27     DeleteOnce();
  28 }
  29
  30 void
  31 WebGLBuffer::Delete() {
  32     mContext->MakeContextCurrent();
  33     mContext->gl->fDeleteBuffers(1, &mGLName);
  34     mByteLength = 0;
  35     mCache = nullptr;
  36     LinkedListElement<WebGLBuffer>::remove(); // remove from mContext->mBuffers
  37 }
  38
  39 void
  40 WebGLBuffer::OnTargetChanged() {
  41     if (!mCache && mTarget == LOCAL_GL_ELEMENT_ARRAY_BUFFER)
  42         mCache = new WebGLElementArrayCache;
  43 }
  44
  45 bool
  46 WebGLBuffer::ElementArrayCacheBufferData(const void* ptr, size_t buffer_size_in_bytes) {
  47     if (mTarget == LOCAL_GL_ELEMENT_ARRAY_BUFFER)
  48         return mCache->BufferData(ptr, buffer_size_in_bytes);
  49     return true;
  50 }
  51
  52 void
  53 WebGLBuffer::ElementArrayCacheBufferSubData(size_t pos, const void* ptr, size_t update_size_in_bytes) {
  54     if (mTarget == LOCAL_GL_ELEMENT_ARRAY_BUFFER)
  55         mCache->BufferSubData(pos, ptr, update_size_in_bytes);
  56 }
  57
  58 size_t
  59 WebGLBuffer::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
  60 {
  61     size_t sizeOfCache = mCache ? mCache->SizeOfIncludingThis(aMallocSizeOf) : 0;
  62     return aMallocSizeOf(this) + sizeOfCache;
  63 }
  64
  65 bool
  66 WebGLBuffer::Validate(GLenum type, uint32_t max_allowed,
  67                       size_t first, size_t count,
  68                       uint32_t* out_upperBound)
  69 {
  70     return mCache->Validate(type, max_allowed, first, count, out_upperBound);
  71 }
  72
  73 bool
  74 WebGLBuffer::IsElementArrayUsedWithMultipleTypes() const
  75 {
  76     return mCache->BeenUsedWithMultipleTypes();
  77 }
  78
  79 JSObject*
  80 WebGLBuffer::WrapObject(JSContext *cx) {
  81     return dom::WebGLBufferBinding::Wrap(cx, this);
  82 }
  83
  84 NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(WebGLBuffer)
  85
  86 NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(WebGLBuffer, AddRef)
  87 NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(WebGLBuffer, Release)