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 8 #include "Sample.h" 9 #include "SkBlurMask.h" 10 #include "SkBlurMaskFilter.h" 11 #include "SkCanvas.h" 12 #include "SkSurface.h" 13 14 static SkBitmap make_bitmap() { 15 SkBitmap bm; 16 bm.allocN32Pixels(5, 5); 17 18 for (int y = 0; y < bm.height(); y++) { 19 uint32_t* p = bm.getAddr32(0, y); 20 for (int x = 0; x < bm.width(); x++) { 21 p[x] = ((x + y) & 1) ? SK_ColorWHITE : SK_ColorBLACK; 22 } 23 } 24 return bm; 25 } 26 27 class TextureDomainView : public Sample { 28 SkBitmap fBM; 29 30 public: 31 TextureDomainView(){ 32 fBM = make_bitmap(); 33 } 34 35 protected: 36 virtual bool onQuery(Sample::Event* evt) { 37 if (Sample::TitleQ(*evt)) { 38 Sample::TitleR(evt, "Texture Domain"); 39 return true; 40 } 41 return this->INHERITED::onQuery(evt); 42 } 43 44 virtual void onDrawContent(SkCanvas* canvas) { 45 SkRect srcRect; 46 SkRect dstRect; 47 SkPaint paint; 48 paint.setFilterQuality(kLow_SkFilterQuality); 49 50 // Test that bitmap draws from malloc-backed bitmaps respect 51 // the constrained texture domain. 52 srcRect.setXYWH(1, 1, 3, 3); 53 dstRect.setXYWH(5, 5, 305, 305); 54 canvas->drawBitmapRect(fBM, srcRect, dstRect, &paint, SkCanvas::kStrict_SrcRectConstraint); 55 56 // Test that bitmap draws across separate devices also respect 57 // the constrainted texture domain. 58 // Note: GPU-backed bitmaps follow a different rendering path 59 // when copying from one GPU device to another. 60 SkImageInfo info = SkImageInfo::MakeN32(5, 5, kOpaque_SkAlphaType); 61 auto surface(canvas->makeSurface(info)); 62 63 srcRect.setXYWH(1, 1, 3, 3); 64 dstRect.setXYWH(1, 1, 3, 3); 65 surface->getCanvas()->drawBitmapRect(fBM, srcRect, dstRect, &paint, 66 SkCanvas::kStrict_SrcRectConstraint); 67 68 sk_sp<SkImage> image(surface->makeImageSnapshot()); 69 70 srcRect.setXYWH(1, 1, 3, 3); 71 dstRect.setXYWH(405, 5, 305, 305); 72 canvas->drawImageRect(image, srcRect, dstRect, &paint); 73 74 // Test that bitmap blurring using a subrect 75 // renders correctly 76 srcRect.setXYWH(1, 1, 3, 3); 77 dstRect.setXYWH(5, 405, 305, 305); 78 paint.setMaskFilter(SkMaskFilter::MakeBlur( 79 kNormal_SkBlurStyle, SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(5)), false)); 80 canvas->drawImageRect(image, srcRect, dstRect, &paint); 81 82 // Blur and a rotation + nullptr src rect 83 // This should not trigger the texture domain code 84 // but it will test a code path in SkGpuDevice::drawBitmap 85 // that handles blurs with rects transformed to non- 86 // orthogonal rects. It also tests the nullptr src rect handling 87 paint.setMaskFilter(SkMaskFilter::MakeBlur(kNormal_SkBlurStyle, 88 SkBlurMask::ConvertRadiusToSigma(5))); 89 90 dstRect.setXYWH(-150, -150, 300, 300); 91 canvas->translate(550, 550); 92 canvas->rotate(45); 93 canvas->drawBitmapRect(fBM, dstRect, &paint); 94 } 95 private: 96 typedef Sample INHERITED; 97 }; 98 99 ////////////////////////////////////////////////////////////////////////////// 100 101 DEF_SAMPLE( return new TextureDomainView(); ) 102