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 "SkBlurMask.h" 10 #include "SkBlurMaskFilter.h" 11 #include "SkReadBuffer.h" 12 #include "SkWriteBuffer.h" 13 #include "SkLayerRasterizer.h" 14 15 static void r0(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) { 16 p.setMaskFilter(SkBlurMaskFilter::Create(kNormal_SkBlurStyle, 17 SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(3))))->unref(); 18 rastBuilder->addLayer(p, SkIntToScalar(3), SkIntToScalar(3)); 19 20 p.setMaskFilter(NULL); 21 p.setStyle(SkPaint::kStroke_Style); 22 p.setStrokeWidth(SK_Scalar1); 23 rastBuilder->addLayer(p); 24 25 p.setAlpha(0x11); 26 p.setStyle(SkPaint::kFill_Style); 27 p.setXfermodeMode(SkXfermode::kSrc_Mode); 28 rastBuilder->addLayer(p); 29 } 30 31 static void r1(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) { 32 rastBuilder->addLayer(p); 33 34 p.setAlpha(0x40); 35 p.setXfermodeMode(SkXfermode::kSrc_Mode); 36 p.setStyle(SkPaint::kStroke_Style); 37 p.setStrokeWidth(SK_Scalar1*2); 38 rastBuilder->addLayer(p); 39 } 40 41 static void r2(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) { 42 p.setStyle(SkPaint::kStrokeAndFill_Style); 43 p.setStrokeWidth(SK_Scalar1*4); 44 rastBuilder->addLayer(p); 45 46 p.setStyle(SkPaint::kStroke_Style); 47 p.setStrokeWidth(SK_Scalar1*3/2); 48 p.setXfermodeMode(SkXfermode::kClear_Mode); 49 rastBuilder->addLayer(p); 50 } 51 52 static void r3(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) { 53 p.setStyle(SkPaint::kStroke_Style); 54 p.setStrokeWidth(SK_Scalar1*3); 55 rastBuilder->addLayer(p); 56 57 p.setAlpha(0x20); 58 p.setStyle(SkPaint::kFill_Style); 59 p.setXfermodeMode(SkXfermode::kSrc_Mode); 60 rastBuilder->addLayer(p); 61 } 62 63 static void r4(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) { 64 p.setAlpha(0x60); 65 rastBuilder->addLayer(p, SkIntToScalar(3), SkIntToScalar(3)); 66 67 p.setAlpha(0xFF); 68 p.setXfermodeMode(SkXfermode::kClear_Mode); 69 rastBuilder->addLayer(p, SK_Scalar1*3/2, SK_Scalar1*3/2); 70 71 p.setXfermode(NULL); 72 rastBuilder->addLayer(p); 73 } 74 75 #include "SkDiscretePathEffect.h" 76 77 static void r5(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) { 78 rastBuilder->addLayer(p); 79 80 p.setPathEffect(SkDiscretePathEffect::Create(SK_Scalar1*4, SK_Scalar1*3))->unref(); 81 p.setXfermodeMode(SkXfermode::kSrcOut_Mode); 82 rastBuilder->addLayer(p); 83 } 84 85 static void r6(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) { 86 rastBuilder->addLayer(p); 87 88 p.setAntiAlias(false); 89 SkLayerRasterizer::Builder rastBuilder2; 90 r5(&rastBuilder2, p); 91 p.setRasterizer(rastBuilder2.detachRasterizer())->unref(); 92 p.setXfermodeMode(SkXfermode::kClear_Mode); 93 rastBuilder->addLayer(p); 94 } 95 96 #include "Sk2DPathEffect.h" 97 98 static SkPathEffect* MakeDotEffect(SkScalar radius, const SkMatrix& matrix) { 99 SkPath path; 100 path.addCircle(0, 0, radius); 101 return SkPath2DPathEffect::Create(matrix, path); 102 } 103 104 static void r7(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) { 105 SkMatrix lattice; 106 lattice.setScale(SK_Scalar1*6, SK_Scalar1*6, 0, 0); 107 lattice.postSkew(SK_Scalar1/3, 0, 0, 0); 108 p.setPathEffect(MakeDotEffect(SK_Scalar1*4, lattice))->unref(); 109 rastBuilder->addLayer(p); 110 } 111 112 static void r8(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) { 113 rastBuilder->addLayer(p); 114 115 SkMatrix lattice; 116 lattice.setScale(SK_Scalar1*6, SK_Scalar1*6, 0, 0); 117 lattice.postSkew(SK_Scalar1/3, 0, 0, 0); 118 p.setPathEffect(MakeDotEffect(SK_Scalar1*2, lattice))->unref(); 119 p.setXfermodeMode(SkXfermode::kClear_Mode); 120 rastBuilder->addLayer(p); 121 122 p.setPathEffect(NULL); 123 p.setXfermode(NULL); 124 p.setStyle(SkPaint::kStroke_Style); 125 p.setStrokeWidth(SK_Scalar1); 126 rastBuilder->addLayer(p); 127 } 128 129 static void r9(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) { 130 rastBuilder->addLayer(p); 131 132 SkMatrix lattice; 133 lattice.setScale(SK_Scalar1, SK_Scalar1*6, 0, 0); 134 lattice.postRotate(SkIntToScalar(30), 0, 0); 135 p.setPathEffect(SkLine2DPathEffect::Create(SK_Scalar1*2, lattice))->unref(); 136 p.setXfermodeMode(SkXfermode::kClear_Mode); 137 rastBuilder->addLayer(p); 138 139 p.setPathEffect(NULL); 140 p.setXfermode(NULL); 141 p.setStyle(SkPaint::kStroke_Style); 142 p.setStrokeWidth(SK_Scalar1); 143 rastBuilder->addLayer(p); 144 } 145 146 typedef void (*raster_proc)(SkLayerRasterizer::Builder*, SkPaint&); 147 148 static const raster_proc gRastProcs[] = { 149 r0, r1, r2, r3, r4, r5, r6, r7, r8, r9 150 }; 151 152 #include "SkXfermode.h" 153 154 static void apply_shader(SkPaint* paint, int index) { 155 raster_proc proc = gRastProcs[index]; 156 if (proc) 157 { 158 SkPaint p; 159 SkLayerRasterizer::Builder rastBuilder; 160 161 p.setAntiAlias(true); 162 proc(&rastBuilder, p); 163 paint->setRasterizer(rastBuilder.detachRasterizer())->unref(); 164 } 165 166 #if 0 167 SkScalar dir[] = { SK_Scalar1, SK_Scalar1, SK_Scalar1 }; 168 paint->setMaskFilter(SkBlurMaskFilter::CreateEmboss(dir, SK_Scalar1/4, SkIntToScalar(4), SkIntToScalar(3)))->unref(); 169 #endif 170 paint->setColor(SK_ColorBLUE); 171 } 172 173 class TextEffectsGM : public skiagm::GM { 174 public: 175 TextEffectsGM() {} 176 177 protected: 178 virtual SkString onShortName() SK_OVERRIDE { 179 return SkString("texteffects"); 180 } 181 182 virtual SkISize onISize() SK_OVERRIDE { 183 return SkISize::Make(460, 680); 184 } 185 186 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { 187 canvas->save(); 188 189 SkPaint paint; 190 paint.setAntiAlias(true); 191 paint.setTextSize(SkIntToScalar(56)); 192 193 SkScalar x = SkIntToScalar(20); 194 SkScalar y = paint.getTextSize(); 195 196 SkString str("Hamburgefons"); 197 198 for (int i = 0; i < static_cast<int>(SK_ARRAY_COUNT(gRastProcs)); i++) { 199 apply_shader(&paint, i); 200 201 // paint.setMaskFilter(NULL); 202 // paint.setColor(SK_ColorBLACK); 203 204 canvas->drawText(str.c_str(), str.size(), x, y, paint); 205 206 y += paint.getFontSpacing(); 207 } 208 209 canvas->restore(); 210 } 211 212 private: 213 typedef skiagm::GM INHERITED; 214 }; 215 216 ////////////////////////////////////////////////////////////////////////////// 217 218 static skiagm::GM* MyFactory(void*) { return new TextEffectsGM; } 219 static skiagm::GMRegistry reg(MyFactory); 220
