зеркало из https://github.com/mozilla/gecko-dev.git
93 строки
2.9 KiB
C++
93 строки
2.9 KiB
C++
/* -*- 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/. */
|
|
|
|
#ifndef GFX_COPYABLECANVASLAYER_H
|
|
#define GFX_COPYABLECANVASLAYER_H
|
|
|
|
#include <stdint.h> // for uint32_t
|
|
#include "GLContextTypes.h" // for GLContext
|
|
#include "Layers.h" // for CanvasLayer, etc
|
|
#include "gfxASurface.h" // for gfxASurface
|
|
#include "gfxContext.h" // for gfxContext, etc
|
|
#include "gfxImageSurface.h" // for gfxImageSurface
|
|
#include "gfxPlatform.h" // for gfxImageFormat
|
|
#include "gfxPoint.h" // for gfxIntSize
|
|
#include "mozilla/Assertions.h" // for MOZ_ASSERT, etc
|
|
#include "mozilla/Preferences.h" // for Preferences
|
|
#include "mozilla/RefPtr.h" // for RefPtr
|
|
#include "mozilla/gfx/2D.h" // for DrawTarget
|
|
#include "mozilla/mozalloc.h" // for operator delete, etc
|
|
#include "nsAutoPtr.h" // for nsRefPtr
|
|
#include "nsTraceRefcnt.h" // for MOZ_COUNT_CTOR, etc
|
|
|
|
using namespace mozilla::gfx;
|
|
|
|
namespace mozilla {
|
|
namespace layers {
|
|
|
|
class CanvasClientWebGL;
|
|
|
|
/**
|
|
* A shared CanvasLayer implementation that supports copying
|
|
* its contents into a gfxASurface using UpdateSurface.
|
|
*/
|
|
class CopyableCanvasLayer : public CanvasLayer
|
|
{
|
|
public:
|
|
CopyableCanvasLayer(LayerManager* aLayerManager, void *aImplData);
|
|
virtual ~CopyableCanvasLayer();
|
|
|
|
virtual void Initialize(const Data& aData);
|
|
|
|
|
|
protected:
|
|
void PaintWithOpacity(gfxContext* aContext,
|
|
float aOpacity,
|
|
Layer* aMaskLayer,
|
|
gfxContext::GraphicsOperator aOperator = gfxContext::OPERATOR_OVER);
|
|
|
|
void UpdateSurface(gfxASurface* aDestSurface = nullptr, Layer* aMaskLayer = nullptr);
|
|
|
|
nsRefPtr<gfxASurface> mSurface;
|
|
nsRefPtr<mozilla::gl::GLContext> mGLContext;
|
|
mozilla::RefPtr<mozilla::gfx::DrawTarget> mDrawTarget;
|
|
|
|
uint32_t mCanvasFramebuffer;
|
|
|
|
bool mIsGLAlphaPremult;
|
|
bool mNeedsYFlip;
|
|
bool mForceReadback;
|
|
|
|
nsRefPtr<gfxImageSurface> mCachedTempSurface;
|
|
gfxIntSize mCachedSize;
|
|
gfxImageFormat mCachedFormat;
|
|
|
|
gfxImageSurface* GetTempSurface(const gfxIntSize& aSize, const gfxImageFormat aFormat)
|
|
{
|
|
if (!mCachedTempSurface ||
|
|
aSize.width != mCachedSize.width ||
|
|
aSize.height != mCachedSize.height ||
|
|
aFormat != mCachedFormat)
|
|
{
|
|
mCachedTempSurface = new gfxImageSurface(aSize, aFormat);
|
|
mCachedSize = aSize;
|
|
mCachedFormat = aFormat;
|
|
}
|
|
|
|
MOZ_ASSERT(mCachedTempSurface->Stride() == mCachedTempSurface->Width() * 4);
|
|
return mCachedTempSurface;
|
|
}
|
|
|
|
void DiscardTempSurface()
|
|
{
|
|
mCachedTempSurface = nullptr;
|
|
}
|
|
};
|
|
|
|
}
|
|
}
|
|
|
|
#endif
|