1
2/*
3 * Copyright 2011 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#include "SampleCode.h"
9#include "SkView.h"
10#include "SkCanvas.h"
11#include "SkCornerPathEffect.h"
12#include "SkCullPoints.h"
13#include "SkGradientShader.h"
14#include "SkPath.h"
15#include "SkRegion.h"
16#include "SkShader.h"
17#include "SkUtils.h"
18
19static void create_bitmap(SkBitmap* bitmap) {
20    const int W = 100;
21    const int H = 100;
22    bitmap->setConfig(SkBitmap::kARGB_8888_Config, W, H);
23    bitmap->allocPixels();
24
25    SkCanvas canvas(*bitmap);
26    canvas.drawColor(SK_ColorRED);
27    SkPaint paint;
28    paint.setColor(SK_ColorBLUE);
29    canvas.drawCircle(SkIntToScalar(W)/2, SkIntToScalar(H)/2, SkIntToScalar(W)/2, paint);
30}
31
32class WritePixelsView : public SampleView {
33    SkPath fPath;
34public:
35	WritePixelsView() {}
36
37protected:
38    // overrides from SkEventSink
39    virtual bool onQuery(SkEvent* evt) {
40        if (SampleCode::TitleQ(*evt)) {
41            SampleCode::TitleR(evt, "WritePixels");
42            return true;
43        }
44        return this->INHERITED::onQuery(evt);
45    }
46
47    virtual void onDrawContent(SkCanvas* canvas) {
48        SkBitmap bitmap;
49        create_bitmap(&bitmap);
50        int x = bitmap.width() / 2;
51        int y = bitmap.height() / 2;
52
53        SkBitmap subset;
54        bitmap.extractSubset(&subset, SkIRect::MakeXYWH(x, y, x, y));
55
56        canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
57
58        canvas->writePixels(bitmap, 0, 0);
59        canvas->writePixels(subset, 0, 0);
60    }
61
62private:
63    typedef SampleView INHERITED;
64};
65
66//////////////////////////////////////////////////////////////////////////////
67
68static SkView* MyFactory() { return new WritePixelsView; }
69static SkViewRegister reg(MyFactory);
70
71