103 lines
3.6 KiB
C++
103 lines
3.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "CopyableCanvasLayer.h"
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#include "BasicLayersImpl.h" // for FillWithMask, etc
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#include "GLContext.h" // for GLContext
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#include "GLScreenBuffer.h" // for GLScreenBuffer
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#include "SharedSurface.h" // for SharedSurface
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#include "SharedSurfaceGL.h" // for SharedSurface
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#include "gfxPattern.h" // for gfxPattern, etc
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#include "gfxPlatform.h" // for gfxPlatform, gfxImageFormat
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#include "gfxRect.h" // for gfxRect
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#include "gfxUtils.h" // for gfxUtils
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#include "gfx2DGlue.h" // for thebes --> moz2d transition
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#include "mozilla/gfx/BaseSize.h" // for BaseSize
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#include "mozilla/gfx/Tools.h"
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#include "mozilla/gfx/Point.h" // for IntSize
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#include "mozilla/layers/AsyncCanvasRenderer.h"
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#include "mozilla/layers/PersistentBufferProvider.h"
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#include "nsDebug.h" // for NS_ASSERTION, NS_WARNING, etc
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#include "nsISupportsImpl.h" // for gfxContext::AddRef, etc
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#include "nsRect.h" // for mozilla::gfx::IntRect
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#include "gfxUtils.h"
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#include "client/TextureClientSharedSurface.h"
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namespace mozilla {
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namespace layers {
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using namespace mozilla::gfx;
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using namespace mozilla::gl;
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CopyableCanvasLayer::CopyableCanvasLayer(LayerManager* aLayerManager, void *aImplData) :
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CanvasLayer(aLayerManager, aImplData)
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, mGLFrontbuffer(nullptr)
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, mIsAlphaPremultiplied(true)
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, mOriginPos(gl::OriginPos::TopLeft)
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, mIsMirror(false)
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{
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MOZ_COUNT_CTOR(CopyableCanvasLayer);
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}
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CopyableCanvasLayer::~CopyableCanvasLayer()
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{
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MOZ_COUNT_DTOR(CopyableCanvasLayer);
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}
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void
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CopyableCanvasLayer::Initialize(const Data& aData)
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{
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if (aData.mGLContext) {
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mGLContext = aData.mGLContext;
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mIsAlphaPremultiplied = aData.mIsGLAlphaPremult;
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mOriginPos = gl::OriginPos::BottomLeft;
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mIsMirror = aData.mIsMirror;
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MOZ_ASSERT(mGLContext->IsOffscreen(), "canvas gl context isn't offscreen");
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if (aData.mFrontbufferGLTex) {
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gfx::IntSize size(aData.mSize.width, aData.mSize.height);
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mGLFrontbuffer = SharedSurface_Basic::Wrap(aData.mGLContext, size, aData.mHasAlpha,
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aData.mFrontbufferGLTex);
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mBufferProvider = aData.mBufferProvider;
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}
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} else if (aData.mBufferProvider) {
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mBufferProvider = aData.mBufferProvider;
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} else if (aData.mRenderer) {
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mAsyncRenderer = aData.mRenderer;
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mOriginPos = gl::OriginPos::BottomLeft;
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} else {
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MOZ_CRASH("GFX: CanvasLayer created without BufferProvider, DrawTarget or GLContext?");
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}
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mBounds.SetRect(0, 0, aData.mSize.width, aData.mSize.height);
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}
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bool
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CopyableCanvasLayer::IsDataValid(const Data& aData)
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{
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return mGLContext == aData.mGLContext;
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}
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DataSourceSurface*
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CopyableCanvasLayer::GetTempSurface(const IntSize& aSize,
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const SurfaceFormat aFormat)
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{
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if (!mCachedTempSurface ||
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aSize != mCachedTempSurface->GetSize() ||
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aFormat != mCachedTempSurface->GetFormat())
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{
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// Create a surface aligned to 8 bytes since that's the highest alignment WebGL can handle.
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uint32_t stride = GetAlignedStride<8>(aSize.width, BytesPerPixel(aFormat));
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mCachedTempSurface = Factory::CreateDataSourceSurfaceWithStride(aSize, aFormat, stride);
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}
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return mCachedTempSurface;
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}
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} // namespace layers
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} // namespace mozilla
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