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 19static void create_bitmap(SkBitmap* bitmap) { 20 const int W = 100; 21 const int H = 100; 22 bitmap->setConfig(SkBitmap::kARGB_8888_Config, W, H); 23 bitmap->allocPixels(); 24 25 SkCanvas canvas(*bitmap); 26 canvas.drawColor(SK_ColorRED); 27 SkPaint paint; 28 paint.setColor(SK_ColorBLUE); 29 canvas.drawCircle(SkIntToScalar(W)/2, SkIntToScalar(H)/2, SkIntToScalar(W)/2, paint); 30} 31 32class WritePixelsView : public SampleView { 33 SkPath fPath; 34public: 35 WritePixelsView() {} 36 37protected: 38 // overrides from SkEventSink 39 virtual bool onQuery(SkEvent* evt) { 40 if (SampleCode::TitleQ(*evt)) { 41 SampleCode::TitleR(evt, "WritePixels"); 42 return true; 43 } 44 return this->INHERITED::onQuery(evt); 45 } 46 47 virtual void onDrawContent(SkCanvas* canvas) { 48 SkBitmap bitmap; 49 create_bitmap(&bitmap); 50 int x = bitmap.width() / 2; 51 int y = bitmap.height() / 2; 52 53 SkBitmap subset; 54 bitmap.extractSubset(&subset, SkIRect::MakeXYWH(x, y, x, y)); 55 56 canvas->translate(SkIntToScalar(20), SkIntToScalar(20)); 57 58 canvas->writePixels(bitmap, 0, 0); 59 canvas->writePixels(subset, 0, 0); 60 } 61 62private: 63 typedef SampleView INHERITED; 64}; 65 66////////////////////////////////////////////////////////////////////////////// 67 68static SkView* MyFactory() { return new WritePixelsView; } 69static SkViewRegister reg(MyFactory); 70 71