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 "SkPictureRecorder.h" 14 #include "SkRegion.h" 15 #include "SkShader.h" 16 #include "SkUtils.h" 17 #include "SkColorPriv.h" 18 #include "SkColorFilter.h" 19 #include "SkPicture.h" 20 #include "SkTypeface.h" 21 22 // effects 23 #include "SkGradientShader.h" 24 #include "SkBlurMask.h" 25 #include "SkBlurDrawLooper.h" 26 27 static void makebm(SkBitmap* bm, SkColorType ct, int w, int h) { 28 bm->allocPixels(SkImageInfo::Make(w, h, ct, kPremul_SkAlphaType)); 29 bm->eraseColor(SK_ColorTRANSPARENT); 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 paint.setDither(true); 38 paint.setShader(SkGradientShader::CreateLinear(pts, colors, pos, 39 SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode))->unref(); 40 canvas.drawPaint(paint); 41 } 42 43 static void setup(SkPaint* paint, const SkBitmap& bm, bool filter, 44 SkShader::TileMode tmx, SkShader::TileMode tmy) { 45 SkShader* shader = SkShader::CreateBitmapShader(bm, tmx, tmy); 46 paint->setShader(shader)->unref(); 47 paint->setFilterLevel(filter ? SkPaint::kLow_FilterLevel : SkPaint::kNone_FilterLevel); 48 } 49 50 static const SkColorType gColorTypes[] = { 51 kN32_SkColorType, 52 kRGB_565_SkColorType, 53 }; 54 static const int gWidth = 32; 55 static const int gHeight = 32; 56 57 class TilingView : public SampleView { 58 SkAutoTUnref<SkPicture> fTextPicture; 59 SkAutoTUnref<SkBlurDrawLooper> fLooper; 60 public: 61 TilingView() 62 : fLooper(SkBlurDrawLooper::Create(0x88000000, 63 SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(1)), 64 SkIntToScalar(2), SkIntToScalar(2))) { 65 for (size_t i = 0; i < SK_ARRAY_COUNT(gColorTypes); i++) { 66 makebm(&fTexture[i], gColorTypes[i], gWidth, gHeight); 67 } 68 } 69 70 virtual ~TilingView() { 71 } 72 73 SkBitmap fTexture[SK_ARRAY_COUNT(gColorTypes)]; 74 75 protected: 76 // overrides from SkEventSink 77 virtual bool onQuery(SkEvent* evt) { 78 if (SampleCode::TitleQ(*evt)) { 79 SampleCode::TitleR(evt, "Tiling"); 80 return true; 81 } 82 return this->INHERITED::onQuery(evt); 83 } 84 85 virtual void onDrawContent(SkCanvas* canvas) { 86 SkRect r = { 0, 0, SkIntToScalar(gWidth*2), SkIntToScalar(gHeight*2) }; 87 88 static const char* gConfigNames[] = { "8888", "565", "4444" }; 89 90 static const bool gFilters[] = { false, true }; 91 static const char* gFilterNames[] = { "point", "bilinear" }; 92 93 static const SkShader::TileMode gModes[] = { SkShader::kClamp_TileMode, SkShader::kRepeat_TileMode, SkShader::kMirror_TileMode }; 94 static const char* gModeNames[] = { "C", "R", "M" }; 95 96 SkScalar y = SkIntToScalar(24); 97 SkScalar x = SkIntToScalar(10); 98 99 SkPictureRecorder recorder; 100 SkCanvas* textCanvas = NULL; 101 if (NULL == fTextPicture) { 102 textCanvas = recorder.beginRecording(1000, 1000, NULL, 0); 103 } 104 105 if (textCanvas) { 106 for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) { 107 for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) { 108 SkPaint p; 109 SkString str; 110 p.setAntiAlias(true); 111 p.setDither(true); 112 p.setLooper(fLooper); 113 str.printf("[%s,%s]", gModeNames[kx], gModeNames[ky]); 114 115 p.setTextAlign(SkPaint::kCenter_Align); 116 textCanvas->drawText(str.c_str(), str.size(), x + r.width()/2, y, p); 117 118 x += r.width() * 4 / 3; 119 } 120 } 121 } 122 123 y += SkIntToScalar(16); 124 125 for (size_t i = 0; i < SK_ARRAY_COUNT(gColorTypes); i++) { 126 for (size_t j = 0; j < SK_ARRAY_COUNT(gFilters); j++) { 127 x = SkIntToScalar(10); 128 for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) { 129 for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) { 130 SkPaint paint; 131 setup(&paint, fTexture[i], gFilters[j], gModes[kx], gModes[ky]); 132 paint.setDither(true); 133 134 canvas->save(); 135 canvas->translate(x, y); 136 canvas->drawRect(r, paint); 137 canvas->restore(); 138 139 x += r.width() * 4 / 3; 140 } 141 } 142 if (textCanvas) { 143 SkPaint p; 144 SkString str; 145 p.setAntiAlias(true); 146 p.setLooper(fLooper); 147 str.printf("%s, %s", gConfigNames[i], gFilterNames[j]); 148 textCanvas->drawText(str.c_str(), str.size(), x, y + r.height() * 2 / 3, p); 149 } 150 151 y += r.height() * 4 / 3; 152 } 153 } 154 155 if (textCanvas) { 156 SkASSERT(NULL == fTextPicture); 157 fTextPicture.reset(recorder.endRecording()); 158 } 159 160 SkASSERT(fTextPicture); 161 canvas->drawPicture(fTextPicture); 162 } 163 164 private: 165 typedef SampleView INHERITED; 166 }; 167 168 ////////////////////////////////////////////////////////////////////////////// 169 170 static SkView* MyFactory() { return new TilingView; } 171 static SkViewRegister reg(MyFactory); 172
