1
2/*
3 * Copyright 2010 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8
9
10
11#ifndef SkGpuCanvas_DEFINED
12#define SkGpuCanvas_DEFINED
13
14#include "SkCanvas.h"
15
16class GrContext;
17class GrRenderTarget;
18
19/**
20 *  Subclass of canvas that creates devices compatible with the GrContext pass
21 *  to the canvas' constructor.
22 */
23class SkGpuCanvas : public SkCanvas {
24public:
25    /**
26     *  The GrContext object is reference counted. When passed to our
27     *  constructor, its reference count is incremented. In our destructor, the
28     *  GrGpu's reference count will be decremented.
29     *  GrRenderTarget represents the rendering destination in the underlying
30     *  3D API. Its reference count is incremented in the constructor and
31     *  decremented in the destructor.
32     */
33    explicit SkGpuCanvas(GrContext*, GrRenderTarget*);
34    virtual ~SkGpuCanvas();
35
36    /**
37     *  Override from SkCanvas. Returns true, and if not-null, sets size to
38     *  be the width/height of our viewport.
39     */
40    virtual bool getViewport(SkIPoint* size) const;
41
42#if 0
43    virtual int saveLayer(const SkRect* bounds, const SkPaint* paint,
44                          SaveFlags flags = kARGB_ClipLayer_SaveFlag) {
45        return this->save(flags);
46    }
47#endif
48
49private:
50    GrContext* fContext;
51
52    typedef SkCanvas INHERITED;
53};
54
55#endif
56
57
58