author Phil Ringnalda <>
Wed, 29 Jun 2016 19:35:24 -0700
changeset 303220 48bd14a01b55464215c0bfe973f5657a7b5b7f9c
parent 303196 99d1da1293b7af8a5a42612a103d81b3b7edfc22
child 303383 0cbb330c02c75657c3f4f9265d705217bb005c5b
permissions -rw-r--r--
Back out 7 changesets (bug 1281998) for Windows Marionette crashes Backed out changeset d806fac2c856 (bug 1281998) Backed out changeset b8d4fedfd7eb (bug 1281998) Backed out changeset a72929c0c3ec (bug 1281998) Backed out changeset 74198f88fa37 (bug 1281998) Backed out changeset 54a0e73f6906 (bug 1281998) Backed out changeset 99d1da1293b7 (bug 1281998) Backed out changeset a5a9585754b1 (bug 1281998)

/* -*- 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 */


#include "mozilla/layers/Compositor.h"
#include "mozilla/layers/TextureHost.h"
#include "mozilla/gfx/2D.h"

namespace mozilla {
namespace layers {

class BasicCompositingRenderTarget : public CompositingRenderTarget
  BasicCompositingRenderTarget(gfx::DrawTarget* aDrawTarget, const gfx::IntRect& aRect)
    : CompositingRenderTarget(aRect.TopLeft())
    , mDrawTarget(aDrawTarget)
    , mSize(aRect.Size())
  { }

  virtual const char* Name() const override { return "BasicCompositingRenderTarget"; }

  virtual gfx::IntSize GetSize() const override { return mSize; }

  void BindRenderTarget();

  virtual gfx::SurfaceFormat GetFormat() const override
    return mDrawTarget ? mDrawTarget->GetFormat()
                       : gfx::SurfaceFormat(gfx::SurfaceFormat::UNKNOWN);

  RefPtr<gfx::DrawTarget> mDrawTarget;
  gfx::IntSize mSize;

class BasicCompositor : public Compositor
  explicit BasicCompositor(CompositorBridgeParent* aParent, widget::CompositorWidgetProxy *aWidget);

  virtual ~BasicCompositor();


  virtual BasicCompositor* AsBasicCompositor() override { return this; }

  virtual bool Initialize() override;

  virtual void DetachWidget() override;

  virtual TextureFactoryIdentifier GetTextureFactoryIdentifier() override;

  virtual already_AddRefed<CompositingRenderTarget>
  CreateRenderTarget(const gfx::IntRect &aRect, SurfaceInitMode aInit) override;

  virtual already_AddRefed<CompositingRenderTarget>
  CreateRenderTargetFromSource(const gfx::IntRect &aRect,
                               const CompositingRenderTarget *aSource,
                               const gfx::IntPoint &aSourcePoint) override;

  virtual already_AddRefed<CompositingRenderTarget>
  CreateRenderTargetForWindow(const LayoutDeviceIntRect& aRect,
                              const LayoutDeviceIntRect& aClearRect,
                              BufferMode aBufferMode);

  virtual already_AddRefed<DataTextureSource>
  CreateDataTextureSource(TextureFlags aFlags = TextureFlags::NO_FLAGS) override;

  virtual already_AddRefed<DataTextureSource>
  CreateDataTextureSourceAround(gfx::DataSourceSurface* aSurface) override;

  virtual bool SupportsEffect(EffectTypes aEffect) override;

  virtual void SetRenderTarget(CompositingRenderTarget *aSource) override
    mRenderTarget = static_cast<BasicCompositingRenderTarget*>(aSource);
  virtual CompositingRenderTarget* GetCurrentRenderTarget() const override
    return mRenderTarget;

  virtual 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;

  virtual void ClearRect(const gfx::Rect& aRect) override;

  virtual void BeginFrame(const nsIntRegion& aInvalidRegion,
                          const gfx::IntRect *aClipRectIn,
                          const gfx::IntRect& aRenderBounds,
                          const nsIntRegion& aOpaqueRegion,
                          gfx::IntRect *aClipRectOut = nullptr,
                          gfx::IntRect *aRenderBoundsOut = nullptr) override;
  virtual void EndFrame() override;
  virtual void EndFrameForExternalComposition(const gfx::Matrix& aTransform) override;

  virtual bool SupportsPartialTextureUpdate() override { return true; }
  virtual bool CanUseCanvasLayerForSize(const gfx::IntSize &aSize) override { return true; }
  virtual int32_t GetMaxTextureSize() const override;
  virtual void SetDestinationSurfaceSize(const gfx::IntSize& aSize) override { }
  virtual void SetScreenRenderOffset(const ScreenPoint& aOffset) override {

  virtual void MakeCurrent(MakeCurrentFlags aFlags = 0) override { }

  virtual const char* Name() const override { return "Basic"; }

  virtual LayersBackend GetBackendType() const override {
    return LayersBackend::LAYERS_BASIC;

  gfx::DrawTarget *GetDrawTarget() { return mDrawTarget; }


  // The final destination surface
  RefPtr<gfx::DrawTarget> mDrawTarget;
  // The current render target for drawing
  RefPtr<BasicCompositingRenderTarget> mRenderTarget;

  LayoutDeviceIntRect mInvalidRect;
  LayoutDeviceIntRegion mInvalidRegion;
  bool mDidExternalComposition;

  uint32_t mMaxTextureSize;

BasicCompositor* AssertBasicCompositor(Compositor* aCompositor);

} // namespace layers
} // namespace mozilla