SampleTiling.cpp revision b3ec29d2d81ae391e433fbdf8aabc791e426ee38
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 "SkBlurMask.h" 25#include "SkBlurDrawLooper.h" 26 27static void makebm(SkBitmap* bm, SkBitmap::Config config, int w, int h) { 28 bm->setConfig(config, w, h); 29 bm->allocPixels(); 30 bm->eraseColor(SK_ColorTRANSPARENT); 31 32 SkCanvas canvas(*bm); 33 SkPoint pts[] = { { 0, 0 }, { SkIntToScalar(w), SkIntToScalar(h) } }; 34 SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE }; 35 SkScalar pos[] = { 0, SK_Scalar1/2, SK_Scalar1 }; 36 SkPaint paint; 37 38 SkUnitMapper* um = NULL; 39 40 um = new SkCosineMapper; 41// um = new SkDiscreteMapper(12); 42 43 SkAutoUnref au(um); 44 45 paint.setDither(true); 46 paint.setShader(SkGradientShader::CreateLinear(pts, colors, pos, 47 SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode, um))->unref(); 48 canvas.drawPaint(paint); 49} 50 51static void setup(SkPaint* paint, const SkBitmap& bm, bool filter, 52 SkShader::TileMode tmx, SkShader::TileMode tmy) { 53 SkShader* shader = SkShader::CreateBitmapShader(bm, tmx, tmy); 54 paint->setShader(shader)->unref(); 55 paint->setFilterBitmap(filter); 56} 57 58static const SkBitmap::Config gConfigs[] = { 59 SkBitmap::kARGB_8888_Config, 60 SkBitmap::kRGB_565_Config, 61}; 62static const int gWidth = 32; 63static const int gHeight = 32; 64 65class TilingView : public SampleView { 66 SkPicture* fTextPicture; 67 SkBlurDrawLooper fLooper; 68public: 69 TilingView() 70 : fLooper(0x88000000, 71 SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(1)), 72 SkIntToScalar(2), SkIntToScalar(2)) { 73 fTextPicture = new SkPicture(); 74 for (size_t i = 0; i < SK_ARRAY_COUNT(gConfigs); i++) { 75 makebm(&fTexture[i], gConfigs[i], gWidth, gHeight); 76 } 77 } 78 79 ~TilingView() { 80 fTextPicture->unref(); 81 } 82 83 SkBitmap fTexture[SK_ARRAY_COUNT(gConfigs)]; 84 85protected: 86 // overrides from SkEventSink 87 virtual bool onQuery(SkEvent* evt) { 88 if (SampleCode::TitleQ(*evt)) { 89 SampleCode::TitleR(evt, "Tiling"); 90 return true; 91 } 92 return this->INHERITED::onQuery(evt); 93 } 94 95 virtual void onDrawContent(SkCanvas* canvas) { 96 SkRect r = { 0, 0, SkIntToScalar(gWidth*2), SkIntToScalar(gHeight*2) }; 97 98 static const char* gConfigNames[] = { "8888", "565", "4444" }; 99 100 static const bool gFilters[] = { false, true }; 101 static const char* gFilterNames[] = { "point", "bilinear" }; 102 103 static const SkShader::TileMode gModes[] = { SkShader::kClamp_TileMode, SkShader::kRepeat_TileMode, SkShader::kMirror_TileMode }; 104 static const char* gModeNames[] = { "C", "R", "M" }; 105 106 SkScalar y = SkIntToScalar(24); 107 SkScalar x = SkIntToScalar(10); 108 109 SkCanvas* textCanvas = NULL; 110 if (fTextPicture->width() == 0) { 111 textCanvas = fTextPicture->beginRecording(1000, 1000); 112 } 113 114 if (textCanvas) { 115 for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) { 116 for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) { 117 SkPaint p; 118 SkString str; 119 p.setAntiAlias(true); 120 p.setDither(true); 121 p.setLooper(&fLooper); 122 str.printf("[%s,%s]", gModeNames[kx], gModeNames[ky]); 123 124 p.setTextAlign(SkPaint::kCenter_Align); 125 textCanvas->drawText(str.c_str(), str.size(), x + r.width()/2, y, p); 126 127 x += r.width() * 4 / 3; 128 } 129 } 130 } 131 132 y += SkIntToScalar(16); 133 134 for (size_t i = 0; i < SK_ARRAY_COUNT(gConfigs); i++) { 135 for (size_t j = 0; j < SK_ARRAY_COUNT(gFilters); j++) { 136 x = SkIntToScalar(10); 137 for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) { 138 for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) { 139 SkPaint paint; 140 setup(&paint, fTexture[i], gFilters[j], gModes[kx], gModes[ky]); 141 paint.setDither(true); 142 143 canvas->save(); 144 canvas->translate(x, y); 145 canvas->drawRect(r, paint); 146 canvas->restore(); 147 148 x += r.width() * 4 / 3; 149 } 150 } 151 if (textCanvas) { 152 SkPaint p; 153 SkString str; 154 p.setAntiAlias(true); 155 p.setLooper(&fLooper); 156 str.printf("%s, %s", gConfigNames[i], gFilterNames[j]); 157 textCanvas->drawText(str.c_str(), str.size(), x, y + r.height() * 2 / 3, p); 158 } 159 160 y += r.height() * 4 / 3; 161 } 162 } 163 164 canvas->drawPicture(*fTextPicture); 165 } 166 167private: 168 typedef SampleView INHERITED; 169}; 170 171////////////////////////////////////////////////////////////////////////////// 172 173static SkView* MyFactory() { return new TilingView; } 174static SkViewRegister reg(MyFactory); 175