HelloWorld.h revision 52edc4d05380c88de5b334479ad8e537ef2b4925 
1/*
2 * Copyright 2015 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 HelloWorld_DEFINED
11#define HelloWorld_DEFINED
12
13#include "SkSurface.h"
14#include "SkWindow.h"
15
16class GrContext;
17struct GrGLInterface;
18class GrRenderTarget;
19class SkCanvas;
20
21class HelloWorldWindow : public SkOSWindow {
22public:
23    enum DeviceType {
24        kRaster_DeviceType,
25        kGPU_DeviceType,
26    };
27    HelloWorldWindow(void* hwnd);
28    virtual ~HelloWorldWindow() SK_OVERRIDE;
29
30    // Changes the device type of the object.
31    bool setUpBackend();
32
33    DeviceType getDeviceType() const { return fType; }
34
35protected:
36    SkSurface* createSurface() SK_OVERRIDE {
37        if (kGPU_DeviceType == fType) {
38            SkSurfaceProps props(INHERITED::getSurfaceProps());
39            return SkSurface::NewRenderTargetDirect(fRenderTarget, &props);
40        }
41        static const SkImageInfo info = SkImageInfo::MakeN32Premul(
42                SkScalarRoundToInt(this->width()), SkScalarRoundToInt(this->height()));
43        return fSurface = SkSurface::NewRaster(info);
44   }
45
46    void draw(SkCanvas* canvas) SK_OVERRIDE;
47    void drawContents(SkCanvas* canvas);
48
49    void onSizeChange() SK_OVERRIDE;
50
51private:
52    bool findNextMatch();  // Set example to the first one that matches FLAGS_match.
53    void setTitle();
54    void setUpRenderTarget();
55    bool onHandleChar(SkUnichar unichar) SK_OVERRIDE;
56    void tearDownBackend();
57
58    // draw contents
59    SkScalar fRotationAngle;
60
61    // support framework
62    DeviceType fType;
63    SkSurface* fSurface;
64    GrContext* fContext;
65    GrRenderTarget* fRenderTarget;
66    AttachmentInfo fAttachmentInfo;
67    const GrGLInterface* fInterface;
68
69    typedef SkOSWindow INHERITED;
70};
71
72#endif
73