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 "include/core/SkBitmap.h"
8#include "include/core/SkCanvas.h"
9#include "include/core/SkPath.h"
10#include "include/core/SkRegion.h"
11#include "include/core/SkShader.h"
12#include "include/effects/SkCornerPathEffect.h"
13#include "include/effects/SkGradientShader.h"
14#include "samplecode/Sample.h"
15#include "src/utils/SkUTF.h"
16
17static void create_bitmap(SkBitmap* bitmap) {
18    const int W = 100;
19    const int H = 100;
20    bitmap->allocN32Pixels(W, H);
21
22    SkCanvas canvas(*bitmap);
23    canvas.drawColor(SK_ColorRED);
24    SkPaint paint;
25    paint.setColor(SK_ColorBLUE);
26    canvas.drawCircle(SkIntToScalar(W)/2, SkIntToScalar(H)/2, SkIntToScalar(W)/2, paint);
27}
28
29class WritePixelsView : public Sample {
30    SkPath fPath;
31public:
32    WritePixelsView() {}
33
34protected:
35    SkString name() override { return SkString("WritePixels"); }
36
37    void onDrawContent(SkCanvas* canvas) override {
38        SkBitmap bitmap;
39        create_bitmap(&bitmap);
40        int x = bitmap.width() / 2;
41        int y = bitmap.height() / 2;
42
43        SkBitmap subset;
44        bitmap.extractSubset(&subset, SkIRect::MakeXYWH(x, y, x, y));
45
46        canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
47
48        canvas->writePixels(bitmap, 0, 0);
49        canvas->writePixels(subset, 0, 0);
50    }
51
52private:
53    using INHERITED = Sample;
54};
55
56//////////////////////////////////////////////////////////////////////////////
57
58DEF_SAMPLE( return new WritePixelsView(); )
59