/* -*- 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_DRAWTARGETDUAL_H_

#define MOZILLA_GFX_DRAWTARGETDUAL_H_

#include <vector>

#include <sstream>

#include "SourceSurfaceDual.h"

#include "2D.h"

#include "Filters.h"

namespace mozilla {

namespace gfx {

#define FORWARD_FUNCTION(funcName) \

  virtual void funcName() override { mA->funcName(); mB->funcName(); }

Unexecuted instantiation: mozilla::gfx::DrawTargetDual::Flush()

Unexecuted instantiation: mozilla::gfx::DrawTargetDual::PopClip()

Unexecuted instantiation: mozilla::gfx::DrawTargetDual::PopLayer()

#define FORWARD_FUNCTION1(funcName, var1Type, var1Name) \

  virtual void funcName(var1Type var1Name) override { mA->funcName(var1Name); mB->funcName(var1Name); }

Unexecuted instantiation: mozilla::gfx::DrawTargetDual::PushClip(mozilla::gfx::Path const*)

Unexecuted instantiation: mozilla::gfx::DrawTargetDual::PushClipRect(mozilla::gfx::RectTyped<mozilla::gfx::UnknownUnits, float> const&)

/* This is a special type of DrawTarget. It duplicates all drawing calls

 * accross two drawtargets. An exception to this is when a snapshot of another

 * dual DrawTarget is used as the source for any surface data. In this case

 * the snapshot of the first source DrawTarget is used as a source for the call

 * to the first destination DrawTarget (mA) and the snapshot of the second

 * source DrawTarget is used at the source for the second destination

 * DrawTarget (mB). This class facilitates black-background/white-background

 * drawing for per-component alpha extraction for backends which do not support

 * native component alpha.

 */

class DrawTargetDual : public DrawTarget

{

public:

  MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DrawTargetDual, override)

  DrawTargetDual(DrawTarget *aA, DrawTarget *aB)

    : mA(aA)

    , mB(aB)

  { 

    mFormat = aA->GetFormat();

  }

  virtual DrawTargetType GetType() const override { return mA->GetType(); }

  virtual BackendType GetBackendType() const override { return mA->GetBackendType(); }

  virtual already_AddRefed<SourceSurface> Snapshot() override {

    return MakeAndAddRef<SourceSurfaceDual>(mA, mB);

  }

  virtual IntSize GetSize() const override { return mA->GetSize(); }

  virtual void DetachAllSnapshots() override;

  FORWARD_FUNCTION(Flush)

  FORWARD_FUNCTION1(PushClip, const Path *, aPath)

  FORWARD_FUNCTION1(PushClipRect, const Rect &, aRect)

  FORWARD_FUNCTION(PopClip)

  FORWARD_FUNCTION(PopLayer)

  virtual void SetTransform(const Matrix &aTransform) override {

    mTransform = aTransform;

    mA->SetTransform(aTransform);

    mB->SetTransform(aTransform);

  }

  virtual void DrawSurface(SourceSurface *aSurface, const Rect &aDest, const Rect & aSource,

                           const DrawSurfaceOptions &aSurfOptions, const DrawOptions &aOptions) override;

  virtual void DrawFilter(FilterNode *aNode,

                          const Rect &aSourceRect,

                          const Point &aDestPoint,

                          const DrawOptions &aOptions = DrawOptions()) override

  {

    mA->DrawFilter(aNode, aSourceRect, aDestPoint, aOptions);

    mB->DrawFilter(aNode, aSourceRect, aDestPoint, aOptions);

  }

  virtual void MaskSurface(const Pattern &aSource,

                           SourceSurface *aMask,

                           Point aOffset,

                           const DrawOptions &aOptions = DrawOptions()) override;

  virtual void DrawSurfaceWithShadow(SourceSurface *aSurface, const Point &aDest,

                                     const Color &aColor, const Point &aOffset,

                                     Float aSigma, CompositionOp aOp) override;

  virtual void ClearRect(const Rect &aRect) override;

  virtual void CopySurface(SourceSurface *aSurface, const IntRect &aSourceRect,

                           const IntPoint &aDestination) override;

  virtual void FillRect(const Rect &aRect, const Pattern &aPattern, const DrawOptions &aOptions) override;

  virtual void StrokeRect(const Rect &aRect, const Pattern &aPattern,

                          const StrokeOptions &aStrokeOptions, const DrawOptions &aOptions) override;

  virtual void StrokeLine(const Point &aStart, const Point &aEnd, const Pattern &aPattern,

                          const StrokeOptions &aStrokeOptions, const DrawOptions &aOptions) override;

  virtual void Stroke(const Path *aPath, const Pattern &aPattern,

                      const StrokeOptions &aStrokeOptions, const DrawOptions &aOptions) override;

  virtual void Fill(const Path *aPath, const Pattern &aPattern, const DrawOptions &aOptions) override;

  virtual void FillGlyphs(ScaledFont *aScaledFont, const GlyphBuffer &aBuffer,

                          const Pattern &aPattern, const DrawOptions &aOptions) override;

  virtual void Mask(const Pattern &aSource, const Pattern &aMask, const DrawOptions &aOptions) override;

  virtual void PushLayer(bool aOpaque, Float aOpacity,

                         SourceSurface* aMask,

                         const Matrix& aMaskTransform,

                         const IntRect& aBounds = IntRect(),

                         bool aCopyBackground = false) override;

  virtual bool Unrotate(IntPoint aRotation) override

  {

    return mA->Unrotate(aRotation) &&

           mB->Unrotate(aRotation);

  }

  virtual already_AddRefed<SourceSurface>

    CreateSourceSurfaceFromData(unsigned char *aData,

                                const IntSize &aSize,

                                int32_t aStride,

                                SurfaceFormat aFormat) const override

  {

    return mA->CreateSourceSurfaceFromData(aData, aSize, aStride, aFormat);

  }

  virtual already_AddRefed<SourceSurface> OptimizeSourceSurface(SourceSurface *aSurface) const override

  {

    return mA->OptimizeSourceSurface(aSurface);

  }

  virtual already_AddRefed<SourceSurface>

    CreateSourceSurfaceFromNativeSurface(const NativeSurface &aSurface) const override

  {

    return mA->CreateSourceSurfaceFromNativeSurface(aSurface);

  }

  virtual already_AddRefed<DrawTarget>

    CreateSimilarDrawTarget(const IntSize &aSize, SurfaceFormat aFormat) const override;

  virtual already_AddRefed<PathBuilder> CreatePathBuilder(FillRule aFillRule = FillRule::FILL_WINDING) const override

  {

    return mA->CreatePathBuilder(aFillRule);

  }

  virtual already_AddRefed<GradientStops>

    CreateGradientStops(GradientStop *aStops,

                        uint32_t aNumStops,

                        ExtendMode aExtendMode = ExtendMode::CLAMP) const override

  {

    return mA->CreateGradientStops(aStops, aNumStops, aExtendMode);

  }

  virtual already_AddRefed<FilterNode> CreateFilter(FilterType aType) override

  {

    return mA->CreateFilter(aType);

  }

  virtual void *GetNativeSurface(NativeSurfaceType aType) override

  {

    return nullptr;

  }

  virtual bool IsDualDrawTarget() const override

  {

    return true;

  }

  virtual bool IsCurrentGroupOpaque() override { return mA->IsCurrentGroupOpaque(); }

private:

  RefPtr<DrawTarget> mA;

  RefPtr<DrawTarget> mB;

};

} // namespace gfx

} // namespace mozilla

#endif /* MOZILLA_GFX_DRAWTARGETDUAL_H_ */