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 "sk_tool_utils.h" 10 11 #include "SkShader.h" 12 13 // Inspired by svg/as-border-image/svg-as-border-image.html. Draws a four-color checker board bitmap 14 // such that it is stretched and repeat tiled with different filter qualities. It is testing whether 15 // the bmp filter respects the repeat mode at the tile seams. 16 class BmpFilterQualityRepeat : public skiagm::GM { 17 public: BmpFilterQualityRepeat()18 BmpFilterQualityRepeat() { this->setBGColor(sk_tool_utils::color_to_565(0xFFCCBBAA)); } 19 20 protected: 21 onOnceBeforeDraw()22 void onOnceBeforeDraw() override { 23 fBmp.allocN32Pixels(40, 40, true); 24 SkCanvas canvas(fBmp); 25 SkBitmap colorBmp; 26 colorBmp.allocN32Pixels(20, 20, true); 27 colorBmp.eraseColor(0xFFFF0000); 28 canvas.drawBitmap(colorBmp, 0, 0); 29 colorBmp.eraseColor(sk_tool_utils::color_to_565(0xFF008200)); 30 canvas.drawBitmap(colorBmp, 20, 0); 31 colorBmp.eraseColor(sk_tool_utils::color_to_565(0xFFFF9000)); 32 canvas.drawBitmap(colorBmp, 0, 20); 33 colorBmp.eraseColor(sk_tool_utils::color_to_565(0xFF2000FF)); 34 canvas.drawBitmap(colorBmp, 20, 20); 35 } 36 onShortName()37 SkString onShortName() override { return SkString("bmp_filter_quality_repeat"); } 38 onISize()39 SkISize onISize() override { return SkISize::Make(1000, 400); } 40 onDraw(SkCanvas * canvas)41 void onDraw(SkCanvas* canvas) override { 42 this->drawAll(canvas, 2.5f); 43 canvas->translate(0, 250); 44 canvas->scale(0.5, 0.5); 45 this->drawAll(canvas, 1); 46 } 47 48 private: drawAll(SkCanvas * canvas,SkScalar scaleX) const49 void drawAll(SkCanvas* canvas, SkScalar scaleX) const { 50 constexpr struct { 51 SkFilterQuality fQuality; 52 const char* fName; 53 } kQualities[] = { 54 {kNone_SkFilterQuality, "none"}, 55 {kLow_SkFilterQuality, "low"}, 56 {kMedium_SkFilterQuality, "medium"}, 57 {kHigh_SkFilterQuality, "high"}, 58 }; 59 60 SkRect rect = SkRect::MakeLTRB(20, 60, 220, 210); 61 SkMatrix lm = SkMatrix::I(); 62 lm.setScaleX(scaleX); 63 lm.setTranslateX(423); 64 lm.setTranslateY(330); 65 66 SkPaint textPaint; 67 textPaint.setAntiAlias(true); 68 69 SkPaint bmpPaint(textPaint); 70 71 SkFont font(sk_tool_utils::create_portable_typeface()); 72 73 SkAutoCanvasRestore acr(canvas, true); 74 75 for (size_t q = 0; q < SK_ARRAY_COUNT(kQualities); ++q) { 76 constexpr SkShader::TileMode kTM = SkShader::kRepeat_TileMode; 77 bmpPaint.setShader(SkShader::MakeBitmapShader(fBmp, kTM, kTM, &lm)); 78 bmpPaint.setFilterQuality(kQualities[q].fQuality); 79 canvas->drawRect(rect, bmpPaint); 80 canvas->drawString(kQualities[q].fName, 20, 40, font, textPaint); 81 canvas->translate(250, 0); 82 } 83 84 } 85 86 SkBitmap fBmp; 87 88 typedef skiagm::GM INHERITED; 89 }; 90 91 ////////////////////////////////////////////////////////////////////////////// 92 93 DEF_GM(return new BmpFilterQualityRepeat;) 94