1 /* 2 * Copyright 2014 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/gm.h" 9 #include "include/core/SkBitmap.h" 10 #include "include/core/SkCanvas.h" 11 #include "include/core/SkColor.h" 12 #include "include/core/SkFilterQuality.h" 13 #include "include/core/SkMatrix.h" 14 #include "include/core/SkPaint.h" 15 #include "include/core/SkShader.h" 16 #include "include/core/SkSize.h" 17 #include "include/core/SkString.h" 18 #include "include/core/SkTileMode.h" 19 20 /*** 21 * 22 * This GM reproduces Skia bug 2904, in which a tiled bitmap shader was failing to draw correctly 23 * when fractional image scaling was ignored by the high quality bitmap scaler. 24 * 25 ***/ 26 27 namespace skiagm { 28 29 class TiledScaledBitmapGM : public GM { 30 public: 31 TiledScaledBitmapGM()32 TiledScaledBitmapGM() { 33 } 34 35 protected: onShortName()36 SkString onShortName() override { 37 return SkString("tiledscaledbitmap"); 38 } 39 onISize()40 SkISize onISize() override { 41 return SkISize::Make(1016, 616); 42 } 43 make_bm(int width,int height)44 static SkBitmap make_bm(int width, int height) { 45 SkBitmap bm; 46 bm.allocN32Pixels(width, height); 47 bm.eraseColor(SK_ColorTRANSPARENT); 48 SkCanvas canvas(bm); 49 SkPaint paint; 50 paint.setAntiAlias(true); 51 canvas.drawCircle(width/2.f, height/2.f, width/4.f, paint); 52 return bm; 53 } 54 onOnceBeforeDraw()55 void onOnceBeforeDraw() override { 56 fBitmap = make_bm(360, 288); 57 } 58 onDraw(SkCanvas * canvas)59 void onDraw(SkCanvas* canvas) override { 60 SkPaint paint; 61 62 paint.setAntiAlias(true); 63 64 SkMatrix mat; 65 mat.setScale(121.f/360.f, 93.f/288.f); 66 mat.postTranslate(-72, -72); 67 68 paint.setShader(fBitmap.makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat, 69 SkSamplingOptions(SkCubicResampler::Mitchell()), mat)); 70 canvas->drawRect({ 8, 8, 1008, 608 }, paint); 71 } 72 73 private: 74 SkBitmap fBitmap; 75 76 using INHERITED = GM; 77 }; 78 79 ////////////////////////////////////////////////////////////////////////////// 80 81 DEF_GM(return new TiledScaledBitmapGM;) 82 } // namespace skiagm 83