gecko-dev/gfx/layers/basic/BasicCompositor.h

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/* -*- Mode: C++; tab-width: 20; 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 MOZILLA_GFX_BASICCOMPOSITOR_H
#define MOZILLA_GFX_BASICCOMPOSITOR_H
#include "Compositor.h"
namespace mozilla {
namespace layers {
class BasicCompositingRenderTarget : public CompositingRenderTarget
{
public:
BasicCompositingRenderTarget(gfx::DrawTarget* aDrawTarget, const gfx::IntSize& aSize)
: mDrawTarget(aDrawTarget)
, mSize(aSize)
{ }
virtual gfx::IntSize GetSize() const MOZ_OVERRIDE { return mSize; }
RefPtr<gfx::DrawTarget> mDrawTarget;
gfx::IntSize mSize;
};
class BasicCompositor : public Compositor
{
public:
BasicCompositor(nsIWidget *aWidget);
virtual ~BasicCompositor();
virtual bool Initialize() MOZ_OVERRIDE { return true; };
virtual void Destroy() MOZ_OVERRIDE { };
virtual TextureFactoryIdentifier GetTextureFactoryIdentifier() MOZ_OVERRIDE
{
return TextureFactoryIdentifier(LAYERS_BASIC, GetMaxTextureSize());
}
virtual TemporaryRef<CompositingRenderTarget>
CreateRenderTarget(const gfx::IntRect &aRect, SurfaceInitMode aInit) MOZ_OVERRIDE;
virtual TemporaryRef<CompositingRenderTarget>
CreateRenderTargetFromSource(const gfx::IntRect &aRect,
const CompositingRenderTarget *aSource) MOZ_OVERRIDE;
virtual void SetRenderTarget(CompositingRenderTarget *aSource) MOZ_OVERRIDE
{
mRenderTarget = static_cast<BasicCompositingRenderTarget*>(aSource);
}
virtual CompositingRenderTarget* GetCurrentRenderTarget() MOZ_OVERRIDE
{
return mRenderTarget;
}
virtual void DrawQuad(const gfx::Rect& aRect, const gfx::Rect& aClipRect,
const EffectChain &aEffectChain,
gfx::Float aOpacity, const gfx::Matrix4x4 &aTransform,
const gfx::Point& aOffset) MOZ_OVERRIDE;
virtual void BeginFrame(const gfx::Rect *aClipRectIn,
const gfxMatrix& aTransform,
const gfx::Rect& aRenderBounds,
gfx::Rect *aClipRectOut = nullptr,
gfx::Rect *aRenderBoundsOut = nullptr) MOZ_OVERRIDE;
virtual void EndFrame() MOZ_OVERRIDE;
virtual void EndFrameForExternalComposition(const gfxMatrix& aTransform) MOZ_OVERRIDE
{
NS_RUNTIMEABORT("We shouldn't ever hit this");
}
virtual void AbortFrame() MOZ_OVERRIDE;
virtual bool SupportsPartialTextureUpdate() { return true; }
virtual bool CanUseCanvasLayerForSize(const gfxIntSize &aSize) MOZ_OVERRIDE { return true; }
virtual int32_t GetMaxTextureSize() const MOZ_OVERRIDE { return INT32_MAX; }
virtual void SetDestinationSurfaceSize(const gfx::IntSize& aSize) MOZ_OVERRIDE { }
virtual void SetTargetContext(gfxContext* aTarget) MOZ_OVERRIDE
{
mCopyTarget = aTarget;
}
virtual void SetScreenRenderOffset(const ScreenPoint& aOffset) MOZ_OVERRIDE {
}
virtual void MakeCurrent(MakeCurrentFlags aFlags = 0) { }
virtual void PrepareViewport(const gfx::IntSize& aSize,
const gfxMatrix& aWorldTransform) MOZ_OVERRIDE { }
virtual void NotifyLayersTransaction() MOZ_OVERRIDE { }
virtual const char* Name() const { return "Basic"; }
virtual nsIWidget* GetWidget() const MOZ_OVERRIDE { return mWidget; }
virtual const nsIntSize& GetWidgetSize() MOZ_OVERRIDE
{
return mWidgetSize;
}
gfx::DrawTarget *GetDrawTarget() { return mDrawTarget; }
private:
// Widget associated with this compositor
nsIWidget *mWidget;
nsIntSize mWidgetSize;
// The final destination surface
RefPtr<gfx::DrawTarget> mDrawTarget;
// The current render target for drawing
RefPtr<BasicCompositingRenderTarget> mRenderTarget;
// An optional destination target to copy the results
// to after drawing is completed.
nsRefPtr<gfxContext> mCopyTarget;
};
} // namespace layers
} // namespace mozilla
#endif /* MOZILLA_GFX_BASICCOMPOSITOR_H */