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 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: 32 WritePixelsView() {} 33 34 protected: 35 // overrides from SkEventSink 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 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 65 static SkView* MyFactory() { return new WritePixelsView; } 66 static SkViewRegister reg(MyFactory); 67
