Line data    Source code

       1             : /*
       2             :  * Copyright 2017 Google Inc.
       3             :  *
       4             :  * Use of this source code is governed by a BSD-style license that can be
       5             :  * found in the LICENSE file.
       6             :  */
       7             : 
       8             : #ifndef SkClipStackDevice_DEFINED
       9             : #define SkClipStackDevice_DEFINED
      10             : 
      11             : #include "SkClipStack.h"
      12             : #include "SkDevice.h"
      13             : 
      14           0 : class SK_API SkClipStackDevice : public SkBaseDevice {
      15             : public:
      16           0 :     SkClipStackDevice(const SkImageInfo& info, const SkSurfaceProps& props)
      17           0 :         : SkBaseDevice(info, props)
      18           0 :         , fClipStack(fStorage, sizeof(fStorage))
      19           0 :     {}
      20             : 
      21           0 :     SkClipStack& cs() { return fClipStack; }
      22           0 :     const SkClipStack& cs() const { return fClipStack; }
      23             : 
      24             :     SkIRect devClipBounds() const;
      25             : 
      26             : protected:
      27             :     void onSave() override;
      28             :     void onRestore() override;
      29             :     void onClipRect(const SkRect& rect, SkClipOp, bool aa) override;
      30             :     void onClipRRect(const SkRRect& rrect, SkClipOp, bool aa) override;
      31             :     void onClipPath(const SkPath& path, SkClipOp, bool aa) override;
      32             :     void onClipRegion(const SkRegion& deviceRgn, SkClipOp) override;
      33             :     void onSetDeviceClipRestriction(SkIRect* mutableClipRestriction) override;
      34             :     bool onClipIsAA() const override;
      35             :     void onAsRgnClip(SkRegion*) const override;
      36             :     ClipType onGetClipType() const override;
      37             : 
      38             : private:
      39             :     enum {
      40             :         kPreallocCount = 16 // empirically determined, adjust as needed to reduce mallocs
      41             :     };
      42             :     intptr_t fStorage[kPreallocCount * sizeof(SkClipStack::Element) / sizeof(intptr_t)];
      43             :     SkClipStack fClipStack;
      44             : 
      45             :     typedef SkBaseDevice INHERITED;
      46             : };
      47             : 
      48             : #endif