SampleTextureDomain.cpp revision e16efc1882ab34a0bb3ae361a2d37f840044cf87
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 "SkCanvas.h" 10#include "SkDevice.h" 11#include "SkBlurMaskFilter.h" 12 13namespace { 14SkBitmap make_bitmap() { 15 SkBitmap bm; 16 bm.setConfig(SkBitmap::kARGB_8888_Config , 5, 5); 17 bm.allocPixels(); 18 19 for (int y = 0; y < bm.height(); y++) { 20 uint32_t* p = bm.getAddr32(0, y); 21 for (int x = 0; x < bm.width(); x++) { 22 p[x] = ((x + y) & 1) ? SK_ColorWHITE : SK_ColorBLACK; 23 } 24 } 25 bm.unlockPixels(); 26 return bm; 27} 28} // unnamed namespace 29 30class TextureDomainView : public SampleView { 31 SkBitmap fBM; 32 33public: 34 TextureDomainView(){ 35 fBM = make_bitmap(); 36 } 37 38protected: 39 // overrides from SkEventSink 40 virtual bool onQuery(SkEvent* evt) { 41 if (SampleCode::TitleQ(*evt)) { 42 SampleCode::TitleR(evt, "Texture Domain"); 43 return true; 44 } 45 return this->INHERITED::onQuery(evt); 46 } 47 48 virtual void onDrawContent(SkCanvas* canvas) { 49 SkIRect srcRect; 50 SkRect dstRect; 51 SkPaint paint; 52 paint.setFilterBitmap(true); 53 54 // Test that bitmap draws from malloc-backed bitmaps respect 55 // the constrained texture domain. 56 srcRect.setXYWH(1, 1, 3, 3); 57 dstRect.setXYWH(5.0f, 5.0f, 305.0f, 305.0f); 58 canvas->drawBitmapRect(fBM, &srcRect, dstRect, &paint); 59 60 // Test that bitmap draws across separate devices also respect 61 // the constrainted texture domain. 62 // Note: GPU-backed bitmaps follow a different rendering path 63 // when copying from one GPU device to another. 64 SkAutoTUnref<SkDevice> secondDevice(canvas->createCompatibleDevice( 65 SkBitmap::kARGB_8888_Config, 5, 5, true)); 66 SkCanvas secondCanvas(secondDevice.get()); 67 68 srcRect.setXYWH(1, 1, 3, 3); 69 dstRect.setXYWH(1.0f, 1.0f, 3.0f, 3.0f); 70 secondCanvas.drawBitmapRect(fBM, &srcRect, dstRect, &paint); 71 72 SkBitmap deviceBitmap = secondDevice->accessBitmap(false); 73 74 srcRect.setXYWH(1, 1, 3, 3); 75 dstRect.setXYWH(405.0f, 5.0f, 305.0f, 305.0f); 76 canvas->drawBitmapRect(deviceBitmap, &srcRect, dstRect, &paint); 77 78 // Test that bitmap blurring using a subrect 79 // renders correctly 80 srcRect.setXYWH(1, 1, 3, 3); 81 dstRect.setXYWH(5.0f, 405.0f, 305.0f, 305.0f); 82 SkMaskFilter* mf = SkBlurMaskFilter::Create( 83 5, 84 SkBlurMaskFilter::kNormal_BlurStyle, 85 SkBlurMaskFilter::kHighQuality_BlurFlag | 86 SkBlurMaskFilter::kIgnoreTransform_BlurFlag); 87 paint.setMaskFilter(mf)->unref(); 88 canvas->drawBitmapRect(deviceBitmap, &srcRect, dstRect, &paint); 89 90 // Blur and a rotation + NULL src rect 91 // This should not trigger the texture domain code 92 // but it will test a code path in SkGpuDevice::drawBitmap 93 // that handles blurs with rects transformed to non- 94 // orthogonal rects. It also tests the NULL src rect handling 95 mf = SkBlurMaskFilter::Create( 96 5, 97 SkBlurMaskFilter::kNormal_BlurStyle, 98 SkBlurMaskFilter::kHighQuality_BlurFlag); 99 paint.setMaskFilter(mf)->unref(); 100 101 dstRect.setXYWH(-150.0f, -150.0f, 300.0f, 300.0f); 102 canvas->translate(550, 550); 103 canvas->rotate(45); 104 canvas->drawBitmapRect(fBM, NULL, dstRect, &paint); 105 } 106private: 107 typedef SkView INHERITED; 108}; 109 110////////////////////////////////////////////////////////////////////////////// 111 112static SkView* MyFactory() { return new TextureDomainView; } 113static SkViewRegister reg(MyFactory); 114