1/*
2 * Copyright 2011 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7#include "SampleCode.h"
8#include "SkView.h"
9#include "SkBitmap.h"
10#include "SkCanvas.h"
11#include "SkCornerPathEffect.h"
12#include "SkGradientShader.h"
13#include "SkPath.h"
14#include "SkRegion.h"
15#include "SkShader.h"
16#include "SkUtils.h"
17
18static void create_bitmap(SkBitmap* bitmap) {
19    const int W = 100;
20    const int H = 100;
21    bitmap->allocN32Pixels(W, H);
22
23    SkCanvas canvas(*bitmap);
24    canvas.drawColor(SK_ColorRED);
25    SkPaint paint;
26    paint.setColor(SK_ColorBLUE);
27    canvas.drawCircle(SkIntToScalar(W)/2, SkIntToScalar(H)/2, SkIntToScalar(W)/2, paint);
28}
29
30class WritePixelsView : public SampleView {
31    SkPath fPath;
32public:
33    WritePixelsView() {}
34
35protected:
36    // overrides from SkEventSink
37    virtual bool onQuery(SkEvent* evt) {
38        if (SampleCode::TitleQ(*evt)) {
39            SampleCode::TitleR(evt, "WritePixels");
40            return true;
41        }
42        return this->INHERITED::onQuery(evt);
43    }
44
45    virtual void onDrawContent(SkCanvas* canvas) {
46        SkBitmap bitmap;
47        create_bitmap(&bitmap);
48        int x = bitmap.width() / 2;
49        int y = bitmap.height() / 2;
50
51        SkBitmap subset;
52        bitmap.extractSubset(&subset, SkIRect::MakeXYWH(x, y, x, y));
53
54        canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
55
56        canvas->writePixels(bitmap, 0, 0);
57        canvas->writePixels(subset, 0, 0);
58    }
59
60private:
61    typedef SampleView INHERITED;
62};
63
64//////////////////////////////////////////////////////////////////////////////
65
66static SkView* MyFactory() { return new WritePixelsView; }
67static SkViewRegister reg(MyFactory);
68