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 "SkCanvas.h"
10 #include "SkCornerPathEffect.h"
11 #include "SkGradientShader.h"
12 #include "SkPath.h"
13 #include "SkRegion.h"
14 #include "SkShader.h"
15 #include "SkUtils.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 SampleView {
30 SkPath fPath;
31 public:
WritePixelsView()32 WritePixelsView() {}
33
34 protected:
35 // overrides from SkEventSink
onQuery(SkEvent * evt)36 virtual bool onQuery(SkEvent* evt) {
37 if (SampleCode::TitleQ(*evt)) {
38 SampleCode::TitleR(evt, "WritePixels");
39 return true;
40 }
41 return this->INHERITED::onQuery(evt);
42 }
43
onDrawContent(SkCanvas * canvas)44 virtual void onDrawContent(SkCanvas* canvas) {
45 SkBitmap bitmap;
46 create_bitmap(&bitmap);
47 int x = bitmap.width() / 2;
48 int y = bitmap.height() / 2;
49
50 SkBitmap subset;
51 bitmap.extractSubset(&subset, SkIRect::MakeXYWH(x, y, x, y));
52
53 canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
54
55 canvas->writePixels(bitmap, 0, 0);
56 canvas->writePixels(subset, 0, 0);
57 }
58
59 private:
60 typedef SampleView INHERITED;
61 };
62
63 //////////////////////////////////////////////////////////////////////////////
64
MyFactory()65 static SkView* MyFactory() { return new WritePixelsView; }
66 static SkViewRegister reg(MyFactory);
67