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 24 // Inspired by svg/as-border-image/svg-as-border-image.html. Draws a four-color checker board bitmap 25 // such that it is stretched and repeat tiled with different filter qualities. It is testing whether 26 // the bmp filter respects the repeat mode at the tile seams. 27 class BmpFilterQualityRepeat : public skiagm::GM { 28 public: BmpFilterQualityRepeat()29 BmpFilterQualityRepeat() { this->setBGColor(ToolUtils::color_to_565(0xFFCCBBAA)); } 30 31 protected: 32 onOnceBeforeDraw()33 void onOnceBeforeDraw() override { 34 fBmp.allocN32Pixels(40, 40, true); 35 SkCanvas canvas(fBmp); 36 SkBitmap colorBmp; 37 colorBmp.allocN32Pixels(20, 20, true); 38 colorBmp.eraseColor(0xFFFF0000); 39 canvas.drawImage(colorBmp.asImage(), 0, 0); 40 colorBmp.eraseColor(ToolUtils::color_to_565(0xFF008200)); 41 canvas.drawImage(colorBmp.asImage(), 20, 0); 42 colorBmp.eraseColor(ToolUtils::color_to_565(0xFFFF9000)); 43 canvas.drawImage(colorBmp.asImage(), 0, 20); 44 colorBmp.eraseColor(ToolUtils::color_to_565(0xFF2000FF)); 45 canvas.drawImage(colorBmp.asImage(), 20, 20); 46 } 47 onShortName()48 SkString onShortName() override { return SkString("bmp_filter_quality_repeat"); } 49 onISize()50 SkISize onISize() override { return SkISize::Make(1000, 400); } 51 onDraw(SkCanvas * canvas)52 void onDraw(SkCanvas* canvas) override { 53 this->drawAll(canvas, 2.5f); 54 canvas->translate(0, 250); 55 canvas->scale(0.5, 0.5); 56 this->drawAll(canvas, 1); 57 } 58 59 private: drawAll(SkCanvas * canvas,SkScalar scaleX) const60 void drawAll(SkCanvas* canvas, SkScalar scaleX) const { 61 SkRect rect = SkRect::MakeLTRB(20, 60, 220, 210); 62 SkMatrix lm = SkMatrix::I(); 63 lm.setScaleX(scaleX); 64 lm.setTranslateX(423); 65 lm.setTranslateY(330); 66 67 SkPaint textPaint; 68 textPaint.setAntiAlias(true); 69 70 SkPaint bmpPaint(textPaint); 71 72 SkFont font(ToolUtils::create_portable_typeface()); 73 74 SkAutoCanvasRestore acr(canvas, true); 75 76 const struct { 77 const char* name; 78 SkSamplingOptions sampling; 79 } recs[] = { 80 { "none", SkSamplingOptions(SkFilterMode::kNearest) }, 81 { "low", SkSamplingOptions(SkFilterMode::kLinear) }, 82 { "medium", SkSamplingOptions(SkFilterMode::kLinear, SkMipmapMode::kLinear) }, 83 { "high", SkSamplingOptions(SkCubicResampler::Mitchell()) }, 84 }; 85 86 for (const auto& rec : recs) { 87 constexpr SkTileMode kTM = SkTileMode::kRepeat; 88 bmpPaint.setShader(fBmp.makeShader(kTM, kTM, rec.sampling, lm)); 89 canvas->drawRect(rect, bmpPaint); 90 canvas->drawString(rec.name, 20, 40, font, textPaint); 91 canvas->translate(250, 0); 92 } 93 94 } 95 96 SkBitmap fBmp; 97 98 using INHERITED = skiagm::GM; 99 }; 100 101 ////////////////////////////////////////////////////////////////////////////// 102 103 DEF_GM(return new BmpFilterQualityRepeat;) 104