1 2 /* 3 * Copyright 2011 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 #include "SampleCode.h" 9 #include "SkView.h" 10 #include "SkCanvas.h" 11 #include "SkPaint.h" 12 #include "SkPath.h" 13 #include "SkRegion.h" 14 #include "SkShader.h" 15 #include "SkUtils.h" 16 #include "SkColorPriv.h" 17 #include "SkColorFilter.h" 18 #include "SkPicture.h" 19 #include "SkTypeface.h" 20 21 // effects 22 #include "SkGradientShader.h" 23 #include "SkUnitMappers.h" 24 #include "SkBlurDrawLooper.h" 25 26 static void makebm(SkBitmap* bm, SkBitmap::Config config, int w, int h) { 27 bm->setConfig(config, w, h); 28 bm->allocPixels(); 29 bm->eraseColor(0); 30 31 SkCanvas canvas(*bm); 32 SkPoint pts[] = { { 0, 0 }, { SkIntToScalar(w), SkIntToScalar(h) } }; 33 SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE }; 34 SkScalar pos[] = { 0, SK_Scalar1/2, SK_Scalar1 }; 35 SkPaint paint; 36 37 SkUnitMapper* um = NULL; 38 39 um = new SkCosineMapper; 40 // um = new SkDiscreteMapper(12); 41 42 SkAutoUnref au(um); 43 44 paint.setDither(true); 45 paint.setShader(SkGradientShader::CreateLinear(pts, colors, pos, 46 SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode, um))->unref(); 47 canvas.drawPaint(paint); 48 } 49 50 static void setup(SkPaint* paint, const SkBitmap& bm, bool filter, 51 SkShader::TileMode tmx, SkShader::TileMode tmy) { 52 SkShader* shader = SkShader::CreateBitmapShader(bm, tmx, tmy); 53 paint->setShader(shader)->unref(); 54 paint->setFilterBitmap(filter); 55 } 56 57 static const SkBitmap::Config gConfigs[] = { 58 SkBitmap::kARGB_8888_Config, 59 SkBitmap::kRGB_565_Config, 60 SkBitmap::kARGB_4444_Config 61 }; 62 static const int gWidth = 32; 63 static const int gHeight = 32; 64 65 class TilingView : public SampleView { 66 SkPicture* fTextPicture; 67 SkBlurDrawLooper fLooper; 68 public: 69 TilingView() 70 : fLooper(SkIntToScalar(1), SkIntToScalar(2), SkIntToScalar(2), 71 0x88000000) { 72 fTextPicture = new SkPicture(); 73 for (size_t i = 0; i < SK_ARRAY_COUNT(gConfigs); i++) { 74 makebm(&fTexture[i], gConfigs[i], gWidth, gHeight); 75 } 76 } 77 78 ~TilingView() { 79 fTextPicture->unref(); 80 } 81 82 SkBitmap fTexture[SK_ARRAY_COUNT(gConfigs)]; 83 84 protected: 85 // overrides from SkEventSink 86 virtual bool onQuery(SkEvent* evt) { 87 if (SampleCode::TitleQ(*evt)) { 88 SampleCode::TitleR(evt, "Tiling"); 89 return true; 90 } 91 return this->INHERITED::onQuery(evt); 92 } 93 94 virtual void onDrawContent(SkCanvas* canvas) { 95 SkRect r = { 0, 0, SkIntToScalar(gWidth*2), SkIntToScalar(gHeight*2) }; 96 97 static const char* gConfigNames[] = { "8888", "565", "4444" }; 98 99 static const bool gFilters[] = { false, true }; 100 static const char* gFilterNames[] = { "point", "bilinear" }; 101 102 static const SkShader::TileMode gModes[] = { SkShader::kClamp_TileMode, SkShader::kRepeat_TileMode, SkShader::kMirror_TileMode }; 103 static const char* gModeNames[] = { "C", "R", "M" }; 104 105 SkScalar y = SkIntToScalar(24); 106 SkScalar x = SkIntToScalar(10); 107 108 SkCanvas* textCanvas = NULL; 109 if (fTextPicture->width() == 0) { 110 textCanvas = fTextPicture->beginRecording(1000, 1000); 111 } 112 113 if (textCanvas) { 114 for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) { 115 for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) { 116 SkPaint p; 117 SkString str; 118 p.setAntiAlias(true); 119 p.setDither(true); 120 p.setLooper(&fLooper); 121 str.printf("[%s,%s]", gModeNames[kx], gModeNames[ky]); 122 123 p.setTextAlign(SkPaint::kCenter_Align); 124 textCanvas->drawText(str.c_str(), str.size(), x + r.width()/2, y, p); 125 126 x += r.width() * 4 / 3; 127 } 128 } 129 } 130 131 y += SkIntToScalar(16); 132 133 for (size_t i = 0; i < SK_ARRAY_COUNT(gConfigs); i++) { 134 for (size_t j = 0; j < SK_ARRAY_COUNT(gFilters); j++) { 135 x = SkIntToScalar(10); 136 for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) { 137 for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) { 138 SkPaint paint; 139 setup(&paint, fTexture[i], gFilters[j], gModes[kx], gModes[ky]); 140 paint.setDither(true); 141 142 canvas->save(); 143 canvas->translate(x, y); 144 canvas->drawRect(r, paint); 145 canvas->restore(); 146 147 x += r.width() * 4 / 3; 148 } 149 } 150 if (textCanvas) { 151 SkPaint p; 152 SkString str; 153 p.setAntiAlias(true); 154 p.setLooper(&fLooper); 155 str.printf("%s, %s", gConfigNames[i], gFilterNames[j]); 156 textCanvas->drawText(str.c_str(), str.size(), x, y + r.height() * 2 / 3, p); 157 } 158 159 y += r.height() * 4 / 3; 160 } 161 } 162 163 canvas->drawPicture(*fTextPicture); 164 } 165 166 private: 167 typedef SampleView INHERITED; 168 }; 169 170 ////////////////////////////////////////////////////////////////////////////// 171 172 static SkView* MyFactory() { return new TilingView; } 173 static SkViewRegister reg(MyFactory); 174 175
