1 /* 2 * Copyright 2015 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 "gm.h" 9 #include "SkImage.h" 10 #include "SkImageSource.h" 11 #include "SkSurface.h" 12 13 namespace skiagm { 14 15 // This GM reproduces the issue in crbug.com/472795. The SkImageSource image 16 // is shifted for high quality mode between cpu and gpu. 17 class ImageSourceGM : public GM { 18 public: ImageSourceGM(const char * suffix,SkFilterQuality filter)19 ImageSourceGM(const char* suffix, SkFilterQuality filter) : fSuffix(suffix), fFilter(filter) { 20 this->setBGColor(0xFFFFFFFF); 21 } 22 23 protected: onShortName()24 SkString onShortName() override { 25 SkString name("imagesrc2_"); 26 name.append(fSuffix); 27 return name; 28 } 29 onISize()30 SkISize onISize() override { return SkISize::Make(256, 256); } 31 32 // Create an image with high frequency vertical stripes onOnceBeforeDraw()33 void onOnceBeforeDraw() override { 34 constexpr SkPMColor gColors[] = { 35 SK_ColorRED, SK_ColorGRAY, 36 SK_ColorGREEN, SK_ColorGRAY, 37 SK_ColorBLUE, SK_ColorGRAY, 38 SK_ColorCYAN, SK_ColorGRAY, 39 SK_ColorMAGENTA, SK_ColorGRAY, 40 SK_ColorYELLOW, SK_ColorGRAY, 41 SK_ColorWHITE, SK_ColorGRAY, 42 }; 43 44 auto surface(SkSurface::MakeRasterN32Premul(kImageSize, kImageSize)); 45 SkCanvas* canvas = surface->getCanvas(); 46 47 int curColor = 0; 48 49 for (int x = 0; x < kImageSize; x += 3) { 50 SkRect r = SkRect::MakeXYWH(SkIntToScalar(x), SkIntToScalar(0), 51 SkIntToScalar(3), SkIntToScalar(kImageSize)); 52 SkPaint p; 53 p.setColor(gColors[curColor]); 54 canvas->drawRect(r, p); 55 56 curColor = (curColor+1) % SK_ARRAY_COUNT(gColors); 57 } 58 59 fImage = surface->makeImageSnapshot(); 60 } 61 onDraw(SkCanvas * canvas)62 void onDraw(SkCanvas* canvas) override { 63 const SkRect srcRect = SkRect::MakeLTRB(0, 0, 64 SkIntToScalar(kImageSize), 65 SkIntToScalar(kImageSize)); 66 const SkRect dstRect = SkRect::MakeLTRB(0.75f, 0.75f, 225.75f, 225.75f); 67 68 SkPaint p; 69 p.setImageFilter(SkImageSource::Make(fImage, srcRect, dstRect, fFilter)); 70 71 canvas->saveLayer(nullptr, &p); 72 canvas->restore(); 73 } 74 75 private: 76 static constexpr int kImageSize = 503; 77 78 SkString fSuffix; 79 SkFilterQuality fFilter; 80 sk_sp<SkImage> fImage; 81 82 typedef GM INHERITED; 83 }; 84 85 ////////////////////////////////////////////////////////////////////////////// 86 87 DEF_GM(return new ImageSourceGM("none", kNone_SkFilterQuality);) 88 DEF_GM(return new ImageSourceGM("low", kLow_SkFilterQuality);) 89 DEF_GM(return new ImageSourceGM("med", kMedium_SkFilterQuality);) 90 DEF_GM(return new ImageSourceGM("high", kHigh_SkFilterQuality);) 91 } 92