1 /* 2 * Copyright 2011 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 #include "SkCanvas.h" 11 #include "SkGradientShader.h" 12 #include "SkTypeface.h" 13 14 // test shader w/ transparency 15 static sk_sp<SkShader> make_grad(SkScalar width) { 16 SkColor colors[] = { SK_ColorRED, 0x0000FF00, SK_ColorBLUE }; 17 SkPoint pts[] = { { 0, 0 }, { width, 0 } }; 18 return SkGradientShader::MakeLinear(pts, colors, nullptr, SK_ARRAY_COUNT(colors), 19 SkShader::kMirror_TileMode); 20 } 21 22 // test opaque shader 23 static sk_sp<SkShader> make_grad2(SkScalar width) { 24 SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE }; 25 SkPoint pts[] = { { 0, 0 }, { width, 0 } }; 26 return SkGradientShader::MakeLinear(pts, colors, nullptr, SK_ARRAY_COUNT(colors), 27 SkShader::kMirror_TileMode); 28 } 29 30 static sk_sp<SkShader> make_chrome_solid() { 31 SkColor colors[] = { SK_ColorGREEN, SK_ColorGREEN }; 32 SkPoint pts[] = { { 0, 0 }, { 1, 0 } }; 33 return SkGradientShader::MakeLinear(pts, colors, nullptr, 2, SkShader::kClamp_TileMode); 34 } 35 36 namespace skiagm { 37 38 // Replicate chrome layout test - clipped pathed gradient-shaded text 39 class ChromeGradTextGM1 : public GM { 40 public: 41 ChromeGradTextGM1() { } 42 protected: 43 44 virtual SkString onShortName() { return SkString("chrome_gradtext1"); } 45 virtual SkISize onISize() { return SkISize::Make(500, 480); } 46 virtual void onDraw(SkCanvas* canvas) { 47 SkPaint paint; 48 sk_tool_utils::set_portable_typeface(&paint); 49 SkRect r = SkRect::MakeWH(SkIntToScalar(100), SkIntToScalar(100)); 50 51 canvas->clipRect(r); 52 53 paint.setColor(SK_ColorRED); 54 canvas->drawRect(r, paint); 55 56 // Minimal repro doesn't require AA, LCD, or a nondefault typeface 57 paint.setShader(make_chrome_solid()); 58 paint.setTextSize(SkIntToScalar(500)); 59 60 canvas->drawString("I", 0, 100, paint); 61 } 62 private: 63 typedef GM INHERITED; 64 }; 65 66 67 // Replicate chrome layout test - switching between solid & gradient text 68 class ChromeGradTextGM2 : public GM { 69 public: 70 ChromeGradTextGM2() { } 71 protected: 72 73 virtual SkString onShortName() { return SkString("chrome_gradtext2"); } 74 virtual SkISize onISize() { return SkISize::Make(500, 480); } 75 virtual void onDraw(SkCanvas* canvas) { 76 SkPaint paint; 77 sk_tool_utils::set_portable_typeface(&paint); 78 79 paint.setStyle(SkPaint::kFill_Style); 80 canvas->drawString("Normal Fill Text", 0, 50, paint); 81 paint.setStyle(SkPaint::kStroke_Style); 82 canvas->drawString("Normal Stroke Text", 0, 100, paint); 83 84 // Minimal repro doesn't require AA, LCD, or a nondefault typeface 85 paint.setShader(make_chrome_solid()); 86 87 paint.setStyle(SkPaint::kFill_Style); 88 canvas->drawString("Gradient Fill Text", 0, 150, paint); 89 paint.setStyle(SkPaint::kStroke_Style); 90 canvas->drawString("Gradient Stroke Text", 0, 200, paint); 91 } 92 private: 93 typedef GM INHERITED; 94 }; 95 96 97 98 class GradTextGM : public GM { 99 public: 100 GradTextGM () {} 101 102 protected: 103 SkString onShortName() override { 104 return SkString("gradtext"); 105 } 106 107 SkISize onISize() override { return SkISize::Make(500, 480); } 108 109 static void draw_text(SkCanvas* canvas, const SkPaint& paint) { 110 const char* text = "When in the course of human events"; 111 size_t len = strlen(text); 112 canvas->drawText(text, len, 0, 0, paint); 113 } 114 115 static void draw_text3(SkCanvas* canvas, const SkPaint& paint) { 116 SkPaint p(paint); 117 118 p.setAntiAlias(false); 119 draw_text(canvas, p); 120 p.setAntiAlias(true); 121 canvas->translate(0, paint.getTextSize() * 4/3); 122 draw_text(canvas, p); 123 p.setLCDRenderText(true); 124 canvas->translate(0, paint.getTextSize() * 4/3); 125 draw_text(canvas, p); 126 } 127 128 void onDraw(SkCanvas* canvas) override { 129 SkPaint paint; 130 sk_tool_utils::set_portable_typeface(&paint); 131 paint.setTextSize(SkIntToScalar(26)); 132 133 const SkISize& size = this->getISize(); 134 SkRect r = SkRect::MakeWH(SkIntToScalar(size.width()), 135 SkIntToScalar(size.height()) / 2); 136 canvas->drawRect(r, paint); 137 138 canvas->translate(SkIntToScalar(20), paint.getTextSize()); 139 140 for (int i = 0; i < 2; ++i) { 141 paint.setShader(make_grad(SkIntToScalar(80))); 142 draw_text3(canvas, paint); 143 144 canvas->translate(0, paint.getTextSize() * 2); 145 146 paint.setShader(make_grad2(SkIntToScalar(80))); 147 draw_text3(canvas, paint); 148 149 canvas->translate(0, paint.getTextSize() * 2); 150 } 151 } 152 153 private: 154 typedef GM INHERITED; 155 }; 156 157 ////////////////////////////////////////////////////////////////////////////// 158 159 static GM* MyFactory(void*) { return new GradTextGM; } 160 static GM* CMyFactory(void*) { return new ChromeGradTextGM1; } 161 static GM* CMyFactory2(void*) { return new ChromeGradTextGM2; } 162 163 static GMRegistry reg(MyFactory); 164 static GMRegistry Creg(CMyFactory); 165 static GMRegistry Creg2(CMyFactory2); 166 } 167
