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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "mozilla/layers/Compositor.h"
#include "mozilla/layers/TextureHost.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/gfx/Triangle.h"
#include "mozilla/gfx/Polygon.h"
namespace mozilla {
namespace layers {
class BasicCompositingRenderTarget : public CompositingRenderTarget {
public:
BasicCompositingRenderTarget(gfx::DrawTarget* aDrawTarget,
const gfx::IntRect& aRect,
const gfx::IntPoint& aClipSpaceOrigin)
: CompositingRenderTarget(aRect.TopLeft()),
mDrawTarget(aDrawTarget),
mSize(aRect.Size()),
mClipSpaceOrigin(aClipSpaceOrigin) {}
const char* Name() const override { return "BasicCompositingRenderTarget"; }
gfx::IntSize GetSize() const override { return mSize; }
// The point that DrawGeometry's aClipRect is relative to. Will be (0, 0) for
// root render targets and equal to GetOrigin() for non-root render targets.
gfx::IntPoint GetClipSpaceOrigin() const { return mClipSpaceOrigin; }
// In render target coordinates, i.e. the same space as GetOrigin().
// NOT relative to mClipSpaceOrigin!
void SetClipRect(const Maybe<gfx::IntRect>& aRect) { mClipRect = aRect; }
const Maybe<gfx::IntRect>& GetClipRect() const { return mClipRect; }
void BindRenderTarget();
gfx::SurfaceFormat GetFormat() const override {
return mDrawTarget ? mDrawTarget->GetFormat()
: gfx::SurfaceFormat(gfx::SurfaceFormat::UNKNOWN);
}
RefPtr<gfx::DrawTarget> mDrawTarget;
gfx::IntSize mSize;
gfx::IntPoint mClipSpaceOrigin;
Maybe<gfx::IntRect> mClipRect;
};
class BasicCompositor : public Compositor {
public:
BasicCompositor(CompositorBridgeParent* aParent,
widget::CompositorWidget* aWidget);
protected:
virtual ~BasicCompositor();
public:
BasicCompositor* AsBasicCompositor() override { return this; }
bool Initialize(nsCString* const out_failureReason) override;
void Destroy() override;
TextureFactoryIdentifier GetTextureFactoryIdentifier() override;
already_AddRefed<CompositingRenderTarget> CreateRenderTarget(
const gfx::IntRect& aRect, SurfaceInitMode aInit) override;
already_AddRefed<CompositingRenderTarget> CreateRenderTargetFromSource(
const gfx::IntRect& aRect, const CompositingRenderTarget* aSource,
const gfx::IntPoint& aSourcePoint) override;
virtual already_AddRefed<CompositingRenderTarget> CreateRootRenderTarget(
gfx::DrawTarget* aDrawTarget, const gfx::IntRect& aDrawTargetRect,
const gfx::IntRegion& aClearRegion);
already_AddRefed<DataTextureSource> CreateDataTextureSource(
TextureFlags aFlags = TextureFlags::NO_FLAGS) override;
already_AddRefed<DataTextureSource> CreateDataTextureSourceAround(
gfx::DataSourceSurface* aSurface) override;
already_AddRefed<DataTextureSource> CreateDataTextureSourceAroundYCbCr(
TextureHost* aTexture) override;
bool SupportsEffect(EffectTypes aEffect) override;
bool SupportsLayerGeometry() const override;
bool ReadbackRenderTarget(CompositingRenderTarget* aSource,
AsyncReadbackBuffer* aDest) override;
already_AddRefed<AsyncReadbackBuffer> CreateAsyncReadbackBuffer(
const gfx::IntSize& aSize) override;
bool BlitRenderTarget(CompositingRenderTarget* aSource,
const gfx::IntSize& aSourceSize,
const gfx::IntSize& aDestSize) override;
void SetRenderTarget(CompositingRenderTarget* aSource) override {
mRenderTarget = static_cast<BasicCompositingRenderTarget*>(aSource);
mRenderTarget->BindRenderTarget();
}
already_AddRefed<CompositingRenderTarget> GetWindowRenderTarget()
const override {
return do_AddRef(mFullWindowRenderTarget);
}
already_AddRefed<CompositingRenderTarget> GetCurrentRenderTarget()
const override {
return do_AddRef(mRenderTarget);
}
void DrawQuad(const gfx::Rect& aRect, const gfx::IntRect& aClipRect,
const EffectChain& aEffectChain, gfx::Float aOpacity,
const gfx::Matrix4x4& aTransform,
const gfx::Rect& aVisibleRect) override;
void ClearRect(const gfx::Rect& aRect) override;
Maybe<gfx::IntRect> BeginFrameForWindow(
const nsIntRegion& aInvalidRegion, const Maybe<gfx::IntRect>& aClipRect,
const gfx::IntRect& aRenderBounds,
const nsIntRegion& aOpaqueRegion) override;
Maybe<gfx::IntRect> BeginFrameForTarget(
const nsIntRegion& aInvalidRegion, const Maybe<gfx::IntRect>& aClipRect,
const gfx::IntRect& aRenderBounds, const nsIntRegion& aOpaqueRegion,
gfx::DrawTarget* aTarget, const gfx::IntRect& aTargetBounds) override;
void BeginFrameForNativeLayers() override;
Maybe<gfx::IntRect> BeginRenderingToNativeLayer(
const nsIntRegion& aInvalidRegion, const Maybe<gfx::IntRect>& aClipRect,
const nsIntRegion& aOpaqueRegion, NativeLayer* aNativeLayer) override;
void EndRenderingToNativeLayer() override;
void NormalDrawingDone() override;
void EndFrame() override;
RefPtr<SurfacePoolHandle> GetSurfacePoolHandle() override;
bool SupportsPartialTextureUpdate() override { return true; }
bool CanUseCanvasLayerForSize(const gfx::IntSize& aSize) override {
return true;
}
int32_t GetMaxTextureSize() const override;
void SetDestinationSurfaceSize(const gfx::IntSize& aSize) override {}
void MakeCurrent(MakeCurrentFlags aFlags = 0) override {}
#ifdef MOZ_DUMP_PAINTING
const char* Name() const override { return "Basic"; }
#endif // MOZ_DUMP_PAINTING
LayersBackend GetBackendType() const override {
return LayersBackend::LAYERS_BASIC;
}
bool IsPendingComposite() override { return mIsPendingEndRemoteDrawing; }
void FinishPendingComposite() override;
private:
template <typename Geometry>
void DrawGeometry(const Geometry& aGeometry, const gfx::Rect& aRect,
const gfx::IntRect& aClipRect,
const EffectChain& aEffectChain, gfx::Float aOpacity,
const gfx::Matrix4x4& aTransform,
const gfx::Rect& aVisibleRect, const bool aEnableAA);
void DrawPolygon(const gfx::Polygon& aPolygon, const gfx::Rect& aRect,
const gfx::IntRect& aClipRect,
const EffectChain& aEffectChain, gfx::Float aOpacity,
const gfx::Matrix4x4& aTransform,
const gfx::Rect& aVisibleRect) override;
void TryToEndRemoteDrawing();
void EndRemoteDrawing();
bool NeedsToDeferEndRemoteDrawing();
bool NeedToRecreateFullWindowRenderTarget() const;
// When rendering to a back buffer, this is the front buffer that the contents
// of the back buffer need to be copied to. Only non-null between
// BeginFrameForWindow and EndRemoteDrawing, and only when using a back
// buffer.
RefPtr<gfx::DrawTarget> mFrontBuffer;
// The current render target for drawing
RefPtr<BasicCompositingRenderTarget> mRenderTarget;
// The native layer that we're currently rendering to, if any.
// Non-null only between BeginFrameForWindow and EndFrame if
// BeginFrameForWindow has been called with a non-null aNativeLayer.
RefPtr<NativeLayer> mCurrentNativeLayer;
RefPtr<SurfacePoolHandle> mSurfacePoolHandle;
gfx::IntRegion mInvalidRegion;
uint32_t mMaxTextureSize;
bool mIsPendingEndRemoteDrawing;
bool mShouldInvalidateWindow = false;
// Where the current frame is being rendered to.
enum class FrameDestination : uint8_t {
NO_CURRENT_FRAME, // before BeginFrameForXYZ or after EndFrame
WINDOW, // between BeginFrameForWindow and EndFrame
TARGET, // between BeginFrameForTarget and EndFrame
NATIVE_LAYERS // between BeginFrameForNativeLayers and EndFrame
};
FrameDestination mCurrentFrameDest = FrameDestination::NO_CURRENT_FRAME;
// mDrawTarget will not be the full window on all platforms. We therefore need
// to keep a full window render target around when we are capturing
// screenshots on those platforms.
RefPtr<BasicCompositingRenderTarget> mFullWindowRenderTarget;
// The 1x1 dummy render target that's the "current" render target between
// BeginFrameForNativeLayers and EndFrame but outside pairs of
// Begin/EndRenderingToNativeLayer. Created on demand.
RefPtr<CompositingRenderTarget> mNativeLayersReferenceRT;
};
BasicCompositor* AssertBasicCompositor(Compositor* aCompositor);
} // namespace layers
} // namespace mozilla
#endif /* MOZILLA_GFX_BASICCOMPOSITOR_H */
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