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/gm.h" 9 #include "include/core/SkBitmap.h" 10 #include "include/core/SkCanvas.h" 11 #include "include/core/SkFont.h" 12 #include "include/core/SkMatrix.h" 13 #include "include/core/SkPaint.h" 14 #include "include/core/SkRect.h" 15 #include "include/core/SkScalar.h" 16 #include "include/core/SkShader.h" 17 #include "include/core/SkSize.h" 18 #include "include/core/SkString.h" 19 #include "include/core/SkTileMode.h" 20 #include "include/core/SkTypeface.h" 21 #include "include/core/SkTypes.h" 22 #include "tools/ToolUtils.h" 23 #include "tools/fonts/FontToolUtils.h" 24 25 // Inspired by svg/as-border-image/svg-as-border-image.html. Draws a four-color checker board bitmap 26 // such that it is stretched and repeat tiled with different filter qualities. It is testing whether 27 // the bmp filter respects the repeat mode at the tile seams. 28 class BmpFilterQualityRepeat : public skiagm::GM { 29 public: BmpFilterQualityRepeat()30 BmpFilterQualityRepeat() { this->setBGColor(ToolUtils::color_to_565(0xFFCCBBAA)); } 31 32 protected: 33 onOnceBeforeDraw()34 void onOnceBeforeDraw() override { 35 fBmp.allocN32Pixels(40, 40, true); 36 SkCanvas canvas(fBmp); 37 SkBitmap colorBmp; 38 colorBmp.allocN32Pixels(20, 20, true); 39 colorBmp.eraseColor(0xFFFF0000); 40 canvas.drawImage(colorBmp.asImage(), 0, 0); 41 colorBmp.eraseColor(ToolUtils::color_to_565(0xFF008200)); 42 canvas.drawImage(colorBmp.asImage(), 20, 0); 43 colorBmp.eraseColor(ToolUtils::color_to_565(0xFFFF9000)); 44 canvas.drawImage(colorBmp.asImage(), 0, 20); 45 colorBmp.eraseColor(ToolUtils::color_to_565(0xFF2000FF)); 46 canvas.drawImage(colorBmp.asImage(), 20, 20); 47 } 48 getName() const49 SkString getName() const override { return SkString("bmp_filter_quality_repeat"); } 50 getISize()51 SkISize getISize() override { return SkISize::Make(1000, 400); } 52 onDraw(SkCanvas * canvas)53 void onDraw(SkCanvas* canvas) override { 54 this->drawAll(canvas, 2.5f); 55 canvas->translate(0, 250); 56 canvas->scale(0.5, 0.5); 57 this->drawAll(canvas, 1); 58 } 59 60 private: drawAll(SkCanvas * canvas,SkScalar scaleX) const61 void drawAll(SkCanvas* canvas, SkScalar scaleX) const { 62 SkRect rect = SkRect::MakeLTRB(20, 60, 220, 210); 63 SkMatrix lm = SkMatrix::I(); 64 lm.setScaleX(scaleX); 65 lm.setTranslateX(423); 66 lm.setTranslateY(330); 67 68 SkPaint textPaint; 69 textPaint.setAntiAlias(true); 70 71 SkPaint bmpPaint(textPaint); 72 73 SkFont font = ToolUtils::DefaultPortableFont(); 74 75 SkAutoCanvasRestore acr(canvas, true); 76 77 const struct { 78 const char* name; 79 SkSamplingOptions sampling; 80 } recs[] = { 81 { "none", SkSamplingOptions(SkFilterMode::kNearest) }, 82 { "low", SkSamplingOptions(SkFilterMode::kLinear) }, 83 { "medium", SkSamplingOptions(SkFilterMode::kLinear, SkMipmapMode::kLinear) }, 84 { "high", SkSamplingOptions(SkCubicResampler::Mitchell()) }, 85 }; 86 87 for (const auto& rec : recs) { 88 constexpr SkTileMode kTM = SkTileMode::kRepeat; 89 bmpPaint.setShader(fBmp.makeShader(kTM, kTM, rec.sampling, lm)); 90 canvas->drawRect(rect, bmpPaint); 91 canvas->drawString(rec.name, 20, 40, font, textPaint); 92 canvas->translate(250, 0); 93 } 94 95 } 96 97 SkBitmap fBmp; 98 99 using INHERITED = skiagm::GM; 100 }; 101 102 ////////////////////////////////////////////////////////////////////////////// 103 104 DEF_GM(return new BmpFilterQualityRepeat;) 105