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
create_bitmap(SkBitmap * bitmap)17 static 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
29 class WritePixelsView : public Sample {
30 SkPath fPath;
31 public:
WritePixelsView()32 WritePixelsView() {}
33
34 protected:
name()35 virtual SkString name() { return SkString("WritePixels"); }
36
onDrawContent(SkCanvas * canvas)37 virtual void onDrawContent(SkCanvas* canvas) {
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
52 private:
53 typedef Sample INHERITED;
54 };
55
56 //////////////////////////////////////////////////////////////////////////////
57
58 DEF_SAMPLE( return new WritePixelsView(); )
59