SkExample.h revision bd6343b1d60d2a85e930f33f4b06b4502b3e8caa 
1/*
2 * Copyright 2013 Google Inc.
3 *
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#ifndef SkExample_DEFINED
11#define SkExample_DEFINED
12
13#include "SkWindow.h"
14#include "SkTRegistry.h"
15
16class GrContext;
17struct GrGLInterface;
18class GrRenderTarget;
19class SkCanvas;
20class SkExampleWindow;
21
22class SkExample : public SkNoncopyable {
23public:
24    SkExample(SkExampleWindow* window) : fWindow(window) {}
25
26    // Your class should override this method to do its thing.
27    virtual void draw(SkCanvas* canvas) = 0;
28
29    SkString getName() { return fName; };
30    // Use this public registry to tell the world about your sample.
31    typedef SkTRegistry<SkExample*(*)(SkExampleWindow*)> Registry;
32
33protected:
34    SkExampleWindow* fWindow;
35    SkString fName;
36};
37
38class SkExampleWindow : public SkOSWindow {
39public:
40    enum DeviceType {
41        kRaster_DeviceType,
42        kGPU_DeviceType,
43    };
44    SkExampleWindow(void* hwnd);
45
46    // Changes the device type of the object.
47    bool setupBackend(DeviceType type);
48    void tearDownBackend();
49
50    DeviceType getDeviceType() const { return fType; }
51
52protected:
53    virtual void draw(SkCanvas* canvas) SK_OVERRIDE;
54
55    virtual void onSizeChange() SK_OVERRIDE;
56
57#ifdef SK_BUILD_FOR_WIN
58    virtual void onHandleInval(const SkIRect&) SK_OVERRIDE;
59#endif
60
61    SkCanvas* createCanvas() SK_OVERRIDE;
62
63private:
64    bool findNextMatch();  // Set example to the first one that matches FLAGS_match.
65    void setupRenderTarget();
66    bool onHandleChar(SkUnichar unichar) SK_OVERRIDE;
67
68    DeviceType fType;
69
70    SkExample* fCurrExample;
71    const SkExample::Registry* fRegistry;
72    GrContext* fContext;
73    GrRenderTarget* fRenderTarget;
74    AttachmentInfo fAttachmentInfo;
75    const GrGLInterface* fInterface;
76
77    typedef SkOSWindow INHERITED;
78};
79
80#endif
81