gfx/2d/PathCairo.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef MOZILLA_GFX_PATH_CAIRO_H_
   8 #define MOZILLA_GFX_PATH_CAIRO_H_
   9
  10 #include "2D.h"
  11 #include "cairo.h"
  12 #include <vector>
  13
  14 namespace mozilla {
  15 namespace gfx {
  16
  17 class PathCairo;
  18
  19 class PathBuilderCairo : public PathBuilder {
  20  public:
  21   MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(PathBuilderCairo, override)
  22
  23   explicit PathBuilderCairo(FillRule aFillRule);
  24
  25   void MoveTo(const Point& aPoint) override;
  26   void LineTo(const Point& aPoint) override;
  27   void BezierTo(const Point& aCP1, const Point& aCP2,
  28                 const Point& aCP3) override;
  29   void QuadraticBezierTo(const Point& aCP1, const Point& aCP2) override;
  30   void Close() override;
  31   void Arc(const Point& aOrigin, float aRadius, float aStartAngle,
  32            float aEndAngle, bool aAntiClockwise = false) override;
  33   already_AddRefed<Path> Finish() override;
  34
  35   BackendType GetBackendType() const override { return BackendType::CAIRO; }
  36
  37   bool IsActive() const override { return !mPathData.empty(); }
  38
  39   static already_AddRefed<PathBuilder> Create(FillRule aFillRule);
  40
  41  private:  // data
  42   friend class PathCairo;
  43
  44   FillRule mFillRule;
  45   std::vector<cairo_path_data_t> mPathData;
  46 };
  47
  48 class PathCairo : public Path {
  49  public:
  50   MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(PathCairo, override)
  51
  52   PathCairo(FillRule aFillRule, std::vector<cairo_path_data_t>& aPathData,
  53             const Point& aCurrentPoint, const Point& aBeginPoint);
  54   explicit PathCairo(cairo_t* aContext);
  55   virtual ~PathCairo();
  56
  57   BackendType GetBackendType() const override { return BackendType::CAIRO; }
  58
  59   already_AddRefed<PathBuilder> CopyToBuilder(
  60       FillRule aFillRule) const override;
  61   already_AddRefed<PathBuilder> TransformedCopyToBuilder(
  62       const Matrix& aTransform, FillRule aFillRule) const override;
  63
  64   bool ContainsPoint(const Point& aPoint,
  65                      const Matrix& aTransform) const override;
  66
  67   bool StrokeContainsPoint(const StrokeOptions& aStrokeOptions,
  68                            const Point& aPoint,
  69                            const Matrix& aTransform) const override;
  70
  71   Rect GetBounds(const Matrix& aTransform = Matrix()) const override;
  72
  73   Rect GetStrokedBounds(const StrokeOptions& aStrokeOptions,
  74                         const Matrix& aTransform = Matrix()) const override;
  75
  76   void StreamToSink(PathSink* aSink) const override;
  77
  78   FillRule GetFillRule() const override { return mFillRule; }
  79
  80   void SetPathOnContext(cairo_t* aContext) const;
  81
  82   void AppendPathToBuilder(PathBuilderCairo* aBuilder,
  83                            const Matrix* aTransform = nullptr) const;
  84
  85   bool IsEmpty() const override;
  86
  87  private:
  88   void EnsureContainingContext(const Matrix& aTransform) const;
  89
  90   FillRule mFillRule;
  91   std::vector<cairo_path_data_t> mPathData;
  92   mutable cairo_t* mContainingContext;
  93   mutable Matrix mContainingTransform;
  94   Point mCurrentPoint;
  95   Point mBeginPoint;
  96 };
  97
  98 }  // namespace gfx
  99 }  // namespace mozilla
 100
 101 #endif /* MOZILLA_GFX_PATH_CAIRO_H_ */