gfxPattern.h - mozsearch

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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 GFX_PATTERN_H

#define GFX_PATTERN_H

#include "gfxTypes.h"

#include "gfxMatrix.h"

#include "mozilla/Alignment.h"

#include "mozilla/gfx/2D.h"

#include "mozilla/gfx/PatternHelpers.h"

#include "nsISupportsImpl.h"

#include "nsTArray.h"

typedef struct _cairo_pattern cairo_pattern_t;

class gfxPattern final {

  NS_INLINE_DECL_REFCOUNTING(gfxPattern)

 public:

  explicit gfxPattern(const mozilla::gfx::DeviceColor& aColor);

  // gradients

  gfxPattern(gfxFloat x0, gfxFloat y0, gfxFloat x1, gfxFloat y1);  // linear

  gfxPattern(gfxFloat cx0, gfxFloat cy0, gfxFloat radius0, gfxFloat cx1,

             gfxFloat cy1, gfxFloat radius1);  // radial

  gfxPattern(gfxFloat cx, gfxFloat cy, gfxFloat angle, gfxFloat startOffset,

             gfxFloat endOffset);  // conic

  gfxPattern(mozilla::gfx::SourceSurface* aSurface,

             const mozilla::gfx::Matrix& aPatternToUserSpace);

  void AddColorStop(gfxFloat offset, const mozilla::gfx::DeviceColor& c);

  void SetColorStops(mozilla::gfx::GradientStops* aStops);

  // This should only be called on a cairo pattern that we want to use with

  // Azure. We will read back the color stops from cairo and try to look

  // them up in the cache.

  void CacheColorStops(const mozilla::gfx::DrawTarget* aDT);

  void SetMatrix(const gfxMatrix& matrix);

  gfxMatrix GetMatrix() const;

  gfxMatrix GetInverseMatrix() const;

  /* Get an Azure Pattern for the current Cairo pattern. aPattern transform

   * specifies the transform that was set on the DrawTarget when the pattern

   * was set. When this is nullptr it is assumed the transform is identical

   * to the current transform.

*/

  mozilla::gfx::Pattern* GetPattern(

      const mozilla::gfx::DrawTarget* aTarget,

      const mozilla::gfx::Matrix* aOriginalUserToDevice = nullptr);

  bool IsOpaque();

  // clamp, repeat, reflect

  void SetExtend(mozilla::gfx::ExtendMode aExtend);

  void SetSamplingFilter(mozilla::gfx::SamplingFilter aSamplingFilter);

  mozilla::gfx::SamplingFilter SamplingFilter() const;

  /* returns TRUE if it succeeded */

  bool GetSolidColor(mozilla::gfx::DeviceColor& aColorOut);

 private:

  // Private destructor, to discourage deletion outside of Release():

  ~gfxPattern() = default;

  mozilla::gfx::GeneralPattern mGfxPattern;

  RefPtr<mozilla::gfx::SourceSurface> mSourceSurface;

  mozilla::gfx::Matrix mPatternToUserSpace;

  RefPtr<mozilla::gfx::GradientStops> mStops;

  nsTArray<mozilla::gfx::GradientStop> mStopsList;

  mozilla::gfx::ExtendMode mExtend;

};

#endif /* GFX_PATTERN_H */