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 "Sk64.h" 12#include "SkCornerPathEffect.h" 13#include "SkGradientShader.h" 14#include "SkGraphics.h" 15#include "SkImageDecoder.h" 16#include "SkKernel33MaskFilter.h" 17#include "SkPath.h" 18#include "SkRandom.h" 19#include "SkRegion.h" 20#include "SkShader.h" 21#include "SkUtils.h" 22#include "SkColorPriv.h" 23#include "SkColorFilter.h" 24#include "SkTime.h" 25#include "SkTypeface.h" 26#include "SkXfermode.h" 27 28#include "SkStream.h" 29#include "SkXMLParser.h" 30#include "SkColorPriv.h" 31#include "SkImageDecoder.h" 32#include "SkBlurMaskFilter.h" 33 34#ifdef SK_BUILD_FOR_MAC 35#import <ApplicationServices/ApplicationServices.h> 36SkTypeface* SkCreateTypefaceFromCTFont(CTFontRef fontRef); 37#endif 38 39static void setNamedTypeface(SkPaint* paint, const char name[]) { 40 SkTypeface* face = SkTypeface::CreateFromName(name, SkTypeface::kNormal); 41 paint->setTypeface(face); 42 SkSafeUnref(face); 43} 44 45static uint16_t gBG[] = { 0xFFFF, 0xCCCF, 0xCCCF, 0xFFFF }; 46 47class XfermodesBlurView : public SampleView { 48 SkBitmap fBG; 49 SkBitmap fSrcB, fDstB; 50 51 void draw_mode(SkCanvas* canvas, SkXfermode* mode, int alpha, 52 SkScalar x, SkScalar y) { 53 SkPaint p; 54 SkMaskFilter* mf = SkBlurMaskFilter::Create(5, SkBlurMaskFilter::kNormal_BlurStyle, 0); 55 p.setMaskFilter(mf)->unref(); 56 57 SkScalar ww = SkIntToScalar(W); 58 SkScalar hh = SkIntToScalar(H); 59 60 // draw a circle covering the upper 61 // left three quarters of the canvas 62 p.setColor(0xFFCC44FF); 63 SkRect r; 64 r.set(0, 0, ww*3/4, hh*3/4); 65 r.offset(x, y); 66 canvas->drawOval(r, p); 67 68 p.setXfermode(mode); 69 70 // draw a square overlapping the circle 71 // in the lower right of the canvas 72 p.setColor(0x00AA6633 | alpha << 24); 73 r.set(ww/3, hh/3, ww*19/20, hh*19/20); 74 r.offset(x, y); 75 canvas->drawRect(r, p); 76 77#ifdef SK_BUILD_FOR_MAC 78 static const char* gNames[] = { "Arial", "Times", "Courier", "Lucida" }; 79 for (int j = 0; j < SK_ARRAY_COUNT(gNames); ++j) { 80 CFStringRef name = CFStringCreateWithCString(NULL, gNames[j], kCFStringEncodingUTF8); 81 CTFontRef font = CTFontCreateWithName(name, 0, NULL); 82 SkTypeface* face = SkCreateTypefaceFromCTFont(font); 83 SkDebugf("%s ct:%p face:%p ats:%p\n", gNames[j], font, face, CTFontGetPlatformFont(font, NULL)); 84 for (int i = 9; i <= 24; ++i) { 85 CTFontRef newFont = CTFontCreateCopyWithAttributes(font, i, NULL, NULL); 86 SkTypeface* newFace = SkCreateTypefaceFromCTFont(newFont); 87 SkDebugf("size:%d ct:%p face:%p ats:%p\n", i, newFont, newFace, CTFontGetPlatformFont(newFont, NULL)); 88 newFace->unref(); 89 CFRelease(newFont); 90 } 91 face->unref(); 92 CFRelease(font); 93 CFRelease(name); 94 } 95#endif 96 } 97 98public: 99 const static int W = 64; 100 const static int H = 64; 101 XfermodesBlurView() { 102 const int W = 64; 103 const int H = 64; 104 105 fBG.setConfig(SkBitmap::kARGB_4444_Config, 2, 2, 4); 106 fBG.setPixels(gBG); 107 fBG.setIsOpaque(true); 108 } 109 110protected: 111 // overrides from SkEventSink 112 virtual bool onQuery(SkEvent* evt) { 113 if (SampleCode::TitleQ(*evt)) { 114 SampleCode::TitleR(evt, "XfermodesBlur"); 115 return true; 116 } 117 return this->INHERITED::onQuery(evt); 118 } 119 120 virtual void onDrawContent(SkCanvas* canvas) { 121 canvas->translate(SkIntToScalar(10), SkIntToScalar(20)); 122 123 if (false) { 124 SkPaint paint; 125 paint.setAntiAlias(true); 126 paint.setTextSize(50); 127 paint.setTypeface(SkTypeface::CreateFromName("Arial Unicode MS", SkTypeface::kNormal)); 128 SkSafeUnref(paint.getTypeface()); 129 char buffer[10]; 130 size_t len = SkUTF8_FromUnichar(0x8500, buffer); 131 canvas->drawText(buffer, len, 40, 40, paint); 132 return; 133 } 134 if (false) { 135 SkPaint paint; 136 paint.setAntiAlias(true); 137 138 SkRect r0 = { 0, 0, 10.5f, 20 }; 139 SkRect r1 = { 10.5f, 10, 20, 30 }; 140 paint.setColor(SK_ColorRED); 141 canvas->drawRect(r0, paint); 142 paint.setColor(SK_ColorBLUE); 143 canvas->drawRect(r1, paint); 144 return; 145 } 146 147 const struct { 148 SkXfermode::Mode fMode; 149 const char* fLabel; 150 } gModes[] = { 151 { SkXfermode::kClear_Mode, "Clear" }, 152 { SkXfermode::kSrc_Mode, "Src" }, 153 { SkXfermode::kDst_Mode, "Dst" }, 154 { SkXfermode::kSrcOver_Mode, "SrcOver" }, 155 { SkXfermode::kDstOver_Mode, "DstOver" }, 156 { SkXfermode::kSrcIn_Mode, "SrcIn" }, 157 { SkXfermode::kDstIn_Mode, "DstIn" }, 158 { SkXfermode::kSrcOut_Mode, "SrcOut" }, 159 { SkXfermode::kDstOut_Mode, "DstOut" }, 160 { SkXfermode::kSrcATop_Mode, "SrcATop" }, 161 { SkXfermode::kDstATop_Mode, "DstATop" }, 162 { SkXfermode::kXor_Mode, "Xor" }, 163 164 { SkXfermode::kPlus_Mode, "Plus" }, 165 /*{ SkXfermode::kMultiply_Mode, "Multiply" }, 166 { SkXfermode::kScreen_Mode, "Screen" }, 167 { SkXfermode::kOverlay_Mode, "Overlay" }, 168 { SkXfermode::kDarken_Mode, "Darken" }, 169 { SkXfermode::kLighten_Mode, "Lighten" }, 170 { SkXfermode::kColorDodge_Mode, "ColorDodge" }, 171 { SkXfermode::kColorBurn_Mode, "ColorBurn" }, 172 { SkXfermode::kHardLight_Mode, "HardLight" }, 173 { SkXfermode::kSoftLight_Mode, "SoftLight" }, 174 { SkXfermode::kDifference_Mode, "Difference" }, 175 { SkXfermode::kExclusion_Mode, "Exclusion" },*/ 176 }; 177 178 const SkScalar w = SkIntToScalar(W); 179 const SkScalar h = SkIntToScalar(H); 180 SkShader* s = SkShader::CreateBitmapShader(fBG, 181 SkShader::kRepeat_TileMode, 182 SkShader::kRepeat_TileMode); 183 SkMatrix m; 184 m.setScale(SkIntToScalar(6), SkIntToScalar(6)); 185 s->setLocalMatrix(m); 186 187 SkPaint labelP; 188 labelP.setAntiAlias(true); 189 labelP.setLCDRenderText(true); 190 labelP.setTextAlign(SkPaint::kCenter_Align); 191 setNamedTypeface(&labelP, "Menlo Regular"); 192 193 const int W = 5; 194 195 SkScalar x0 = 0; 196 for (int twice = 0; twice < 2; twice++) { 197 SkScalar x = x0, y = 0; 198 for (size_t i = 0; i < SK_ARRAY_COUNT(gModes); i++) { 199 SkXfermode* mode = SkXfermode::Create(gModes[i].fMode); 200 SkAutoUnref aur(mode); 201 SkRect r; 202 r.set(x, y, x+w, y+h); 203 204 SkPaint p; 205 p.setStyle(SkPaint::kFill_Style); 206 p.setShader(s); 207 canvas->drawRect(r, p); 208 209 canvas->saveLayer(&r, NULL, SkCanvas::kARGB_ClipLayer_SaveFlag); 210 draw_mode(canvas, mode, twice ? 0x88 : 0xFF, r.fLeft, r.fTop); 211 canvas->restore(); 212 213 r.inset(-SK_ScalarHalf, -SK_ScalarHalf); 214 p.setStyle(SkPaint::kStroke_Style); 215 p.setShader(NULL); 216 canvas->drawRect(r, p); 217 218 canvas->drawText(gModes[i].fLabel, strlen(gModes[i].fLabel), 219 x + w/2, y - labelP.getTextSize()/2, labelP); 220 x += w + SkIntToScalar(10); 221 if ((i % W) == W - 1) { 222 x = x0; 223 y += h + SkIntToScalar(30); 224 } 225 } 226 x0 += SkIntToScalar(400); 227 } 228 s->unref(); 229 } 230 231private: 232 typedef SampleView INHERITED; 233}; 234 235////////////////////////////////////////////////////////////////////////////// 236 237static SkView* MyFactory() { return new XfermodesBlurView; } 238static SkViewRegister reg(MyFactory); 239