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->allocN32Pixels(W, H);
23
24    SkCanvas canvas(*bitmap);
25    canvas.drawColor(SK_ColorRED);
26    SkPaint paint;
27    paint.setColor(SK_ColorBLUE);
28    canvas.drawCircle(SkIntToScalar(W)/2, SkIntToScalar(H)/2, SkIntToScalar(W)/2, paint);
29}
30
31class WritePixelsView : public SampleView {
32    SkPath fPath;
33public:
34    WritePixelsView() {}
35
36protected:
37    // overrides from SkEventSink
38    virtual bool onQuery(SkEvent* evt) {
39        if (SampleCode::TitleQ(*evt)) {
40            SampleCode::TitleR(evt, "WritePixels");
41            return true;
42        }
43        return this->INHERITED::onQuery(evt);
44    }
45
46    virtual void onDrawContent(SkCanvas* canvas) {
47        SkBitmap bitmap;
48        create_bitmap(&bitmap);
49        int x = bitmap.width() / 2;
50        int y = bitmap.height() / 2;
51
52        SkBitmap subset;
53        bitmap.extractSubset(&subset, SkIRect::MakeXYWH(x, y, x, y));
54
55        canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
56
57        canvas->writePixels(bitmap, 0, 0);
58        canvas->writePixels(subset, 0, 0);
59    }
60
61private:
62    typedef SampleView INHERITED;
63};
64
65//////////////////////////////////////////////////////////////////////////////
66
67static SkView* MyFactory() { return new WritePixelsView; }
68static SkViewRegister reg(MyFactory);
69