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