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 "SkGradientShader.h"
13 #include "SkPath.h"
14 #include "SkRegion.h"
15 #include "SkShader.h"
16 #include "SkUtils.h"
17
create_bitmap(SkBitmap * bitmap)18 static 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
30 class WritePixelsView : public SampleView {
31 SkPath fPath;
32 public:
WritePixelsView()33 WritePixelsView() {}
34
35 protected:
36 // overrides from SkEventSink
onQuery(SkEvent * evt)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
onDrawContent(SkCanvas * canvas)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
60 private:
61 typedef SampleView INHERITED;
62 };
63
64 //////////////////////////////////////////////////////////////////////////////
65
MyFactory()66 static SkView* MyFactory() { return new WritePixelsView; }
67 static SkViewRegister reg(MyFactory);
68