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
create_bitmap(SkBitmap * bitmap)19 static 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
31 class WritePixelsView : public SampleView {
32 SkPath fPath;
33 public:
WritePixelsView()34 WritePixelsView() {}
35
36 protected:
37 // overrides from SkEventSink
onQuery(SkEvent * evt)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
onDrawContent(SkCanvas * canvas)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
61 private:
62 typedef SampleView INHERITED;
63 };
64
65 //////////////////////////////////////////////////////////////////////////////
66
MyFactory()67 static SkView* MyFactory() { return new WritePixelsView; }
68 static SkViewRegister reg(MyFactory);
69