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 "src/core/SkClipStack.h"
12#include "src/core/SkDevice.h"
13
14class SkClipStackDevice : public SkBaseDevice {
15public:
16 SkClipStackDevice(const SkImageInfo& info, const SkSurfaceProps& props)
17 : SkBaseDevice(info, props)
18 , fClipStack(fStorage, sizeof(fStorage))
19 {}
20
21 SkClipStack& cs() { return fClipStack; }
22 const SkClipStack& cs() const { return fClipStack; }
23
24protected:
25 void onSave() override;
26 void onRestore() override;
27 void onClipRect(const SkRect& rect, SkClipOp, bool aa) override;
28 void onClipRRect(const SkRRect& rrect, SkClipOp, bool aa) override;
29 void onClipPath(const SkPath& path, SkClipOp, bool aa) override;
30 void onClipRegion(const SkRegion& deviceRgn, SkClipOp) override;
31 void onSetDeviceClipRestriction(SkIRect* mutableClipRestriction) override;
32 bool onClipIsAA() const override;
33 bool onClipIsWideOpen() const override;
34 void onAsRgnClip(SkRegion*) const override;
35 ClipType onGetClipType() const override;
36 SkIRect onDevClipBounds() const override;
37
38private:
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
49