1 #include "SampleCode.h" 2 #include "SkView.h" 3 #include "SkCanvas.h" 4 #include "SkGradientShader.h" 5 #include "SkGraphics.h" 6 #include "SkImageDecoder.h" 7 #include "SkImageEncoder.h" 8 #include "SkPath.h" 9 #include "SkRegion.h" 10 #include "SkShader.h" 11 #include "SkUtils.h" 12 #include "SkXfermode.h" 13 #include "SkColorPriv.h" 14 #include "SkColorFilter.h" 15 #include "SkTime.h" 16 #include "SkTypeface.h" 17 18 #include "SkStream.h" 19 20 static void make_image(SkBitmap* bm, SkBitmap::Config config, int configIndex) { 21 const int width = 98; 22 const int height = 100; 23 SkBitmap device; 24 25 device.setConfig(SkBitmap::kARGB_8888_Config, width, height); 26 device.allocPixels(); 27 28 SkCanvas canvas(device); 29 SkPaint paint; 30 31 paint.setAntiAlias(true); 32 canvas.drawColor(SK_ColorRED); 33 paint.setColor(SK_ColorBLUE); 34 canvas.drawCircle(SkIntToScalar(width)/2, SkIntToScalar(height)/2, 35 SkIntToScalar(width)/2, paint); 36 37 bm->setConfig(config, width, height); 38 switch (config) { 39 case SkBitmap::kARGB_8888_Config: 40 bm->swap(device); 41 break; 42 case SkBitmap::kRGB_565_Config: { 43 bm->allocPixels(); 44 for (int y = 0; y < height; y++) { 45 for (int x = 0; x < width; x++) { 46 *bm->getAddr16(x, y) = SkPixel32ToPixel16(*device.getAddr32(x, y)); 47 } 48 } 49 break; 50 } 51 case SkBitmap::kIndex8_Config: { 52 SkPMColor colors[256]; 53 for (int i = 0; i < 256; i++) { 54 if (configIndex & 1) { 55 colors[i] = SkPackARGB32(255-i, 0, 0, 255-i); 56 } else { 57 colors[i] = SkPackARGB32(0xFF, i, 0, 255-i); 58 } 59 } 60 SkColorTable* ctable = new SkColorTable(colors, 256); 61 bm->allocPixels(ctable); 62 ctable->unref(); 63 64 for (int y = 0; y < height; y++) { 65 for (int x = 0; x < width; x++) { 66 *bm->getAddr8(x, y) = SkGetPackedR32(*device.getAddr32(x, y)); 67 } 68 } 69 break; 70 } 71 default: 72 break; 73 } 74 } 75 76 // configs to build the original bitmap in. Can be at most these 3 77 static const SkBitmap::Config gConfigs[] = { 78 SkBitmap::kARGB_8888_Config, 79 SkBitmap::kRGB_565_Config, 80 SkBitmap::kIndex8_Config, // opaque 81 SkBitmap::kIndex8_Config // alpha 82 }; 83 84 static const char* const gConfigLabels[] = { 85 "8888", "565", "Index8", "Index8 alpha" 86 }; 87 88 // types to encode into. Can be at most these 3. Must match up with gExt[] 89 static const SkImageEncoder::Type gTypes[] = { 90 SkImageEncoder::kJPEG_Type, 91 SkImageEncoder::kPNG_Type 92 }; 93 94 // must match up with gTypes[] 95 static const char* const gExt[] = { 96 ".jpg", ".png" 97 }; 98 99 static const char* gPath = "/encoded/"; 100 101 static void make_name(SkString* name, int config, int ext) { 102 name->set(gPath); 103 name->append(gConfigLabels[config]); 104 name->append(gExt[ext]); 105 } 106 107 #include <sys/stat.h> 108 109 class EncodeView : public SampleView { 110 public: 111 SkBitmap* fBitmaps; 112 size_t fBitmapCount; 113 114 EncodeView() { 115 #if 1 116 (void)mkdir(gPath, S_IRWXU | S_IRWXG | S_IRWXO); 117 118 fBitmapCount = SK_ARRAY_COUNT(gConfigs); 119 fBitmaps = new SkBitmap[fBitmapCount]; 120 for (size_t i = 0; i < fBitmapCount; i++) { 121 make_image(&fBitmaps[i], gConfigs[i], i); 122 123 for (size_t j = 0; j < SK_ARRAY_COUNT(gExt); j++) { 124 SkString path; 125 make_name(&path, i, j); 126 127 // remove any previous run of this file 128 remove(path.c_str()); 129 130 SkImageEncoder* codec = SkImageEncoder::Create(gTypes[j]); 131 if (NULL == codec || 132 !codec->encodeFile(path.c_str(), fBitmaps[i], 100)) { 133 SkDebugf("------ failed to encode %s\n", path.c_str()); 134 remove(path.c_str()); // remove any partial file 135 } 136 delete codec; 137 } 138 } 139 #else 140 fBitmaps = NULL; 141 fBitmapCount = 0; 142 #endif 143 this->setBGColor(0xFFDDDDDD); 144 } 145 146 virtual ~EncodeView() { 147 delete[] fBitmaps; 148 } 149 150 protected: 151 // overrides from SkEventSink 152 virtual bool onQuery(SkEvent* evt) { 153 if (SampleCode::TitleQ(*evt)) { 154 SampleCode::TitleR(evt, "ImageEncoder"); 155 return true; 156 } 157 return this->INHERITED::onQuery(evt); 158 } 159 160 virtual void onDrawContent(SkCanvas* canvas) { 161 if (fBitmapCount == 0) { 162 return; 163 } 164 165 SkPaint paint; 166 paint.setAntiAlias(true); 167 paint.setTextAlign(SkPaint::kCenter_Align); 168 169 canvas->translate(SkIntToScalar(10), SkIntToScalar(20)); 170 171 SkScalar x = 0, y = 0, maxX = 0; 172 const int SPACER = 10; 173 174 for (size_t i = 0; i < fBitmapCount; i++) { 175 canvas->drawText(gConfigLabels[i], strlen(gConfigLabels[i]), 176 x + SkIntToScalar(fBitmaps[i].width()) / 2, 0, 177 paint); 178 y = paint.getTextSize(); 179 180 canvas->drawBitmap(fBitmaps[i], x, y); 181 182 SkScalar yy = y; 183 for (size_t j = 0; j < SK_ARRAY_COUNT(gExt); j++) { 184 yy += SkIntToScalar(fBitmaps[i].height() + 10); 185 186 SkBitmap bm; 187 SkString name; 188 189 make_name(&name, i, j); 190 191 SkImageDecoder::DecodeFile(name.c_str(), &bm); 192 canvas->drawBitmap(bm, x, yy); 193 } 194 195 x += SkIntToScalar(fBitmaps[i].width() + SPACER); 196 if (x > maxX) { 197 maxX = x; 198 } 199 } 200 201 y = (paint.getTextSize() + SkIntToScalar(fBitmaps[0].height())) * 3 / 2; 202 x = maxX + SkIntToScalar(10); 203 paint.setTextAlign(SkPaint::kLeft_Align); 204 205 for (size_t j = 0; j < SK_ARRAY_COUNT(gExt); j++) { 206 canvas->drawText(gExt[j], strlen(gExt[j]), x, y, paint); 207 y += SkIntToScalar(fBitmaps[0].height() + SPACER); 208 } 209 } 210 211 virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) { 212 this->inval(NULL); 213 return this->INHERITED::onFindClickHandler(x, y); 214 } 215 216 private: 217 typedef SampleView INHERITED; 218 }; 219 220 ////////////////////////////////////////////////////////////////////////////// 221 222 static SkView* MyFactory() { return new EncodeView; } 223 static SkViewRegister reg(MyFactory); 224 225
