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 "SkData.h" 12 #include "SkImageGenerator.h" 13 #include "SkGradientShader.h" 14 #include "SkGraphics.h" 15 #include "SkImageDecoder.h" 16 #include "SkImageEncoder.h" 17 #include "SkPath.h" 18 #include "SkRegion.h" 19 #include "SkShader.h" 20 #include "SkUtils.h" 21 #include "SkXfermode.h" 22 #include "SkColorPriv.h" 23 #include "SkColorFilter.h" 24 #include "SkTime.h" 25 #include "SkTypeface.h" 26 27 #include "SkStream.h" 28 29 static void make_image(SkBitmap* bm, SkColorType ct, int configIndex) { 30 const int width = 98; 31 const int height = 100; 32 const SkImageInfo info = SkImageInfo::Make(width, height, ct, kPremul_SkAlphaType); 33 34 SkBitmap device; 35 device.allocN32Pixels(width, height); 36 SkCanvas canvas(device); 37 SkPaint paint; 38 39 paint.setAntiAlias(true); 40 canvas.drawColor(SK_ColorRED); 41 paint.setColor(SK_ColorBLUE); 42 canvas.drawCircle(SkIntToScalar(width)/2, SkIntToScalar(height)/2, 43 SkIntToScalar(width)/2, paint); 44 45 switch (ct) { 46 case kN32_SkColorType: 47 bm->swap(device); 48 break; 49 case kRGB_565_SkColorType: { 50 bm->allocPixels(info); 51 for (int y = 0; y < height; y++) { 52 for (int x = 0; x < width; x++) { 53 *bm->getAddr16(x, y) = SkPixel32ToPixel16(*device.getAddr32(x, y)); 54 } 55 } 56 break; 57 } 58 case kIndex_8_SkColorType: { 59 SkPMColor colors[256]; 60 for (int i = 0; i < 256; i++) { 61 if (configIndex & 1) { 62 colors[i] = SkPackARGB32(255-i, 0, 0, 255-i); 63 } else { 64 colors[i] = SkPackARGB32(0xFF, i, 0, 255-i); 65 } 66 } 67 SkColorTable* ctable = new SkColorTable(colors, 256); 68 bm->allocPixels(info, NULL, ctable); 69 ctable->unref(); 70 for (int y = 0; y < height; y++) { 71 for (int x = 0; x < width; x++) { 72 *bm->getAddr8(x, y) = SkGetPackedR32(*device.getAddr32(x, y)); 73 } 74 } 75 break; 76 } 77 default: 78 SkASSERT(0); 79 } 80 } 81 82 // configs to build the original bitmap in. Can be at most these 3 83 static const SkColorType gColorTypes[] = { 84 kN32_SkColorType, 85 kRGB_565_SkColorType, 86 kIndex_8_SkColorType, // opaque 87 kIndex_8_SkColorType // alpha 88 }; 89 90 static const char* const gConfigLabels[] = { 91 "8888", "565", "Index8", "Index8 alpha" 92 }; 93 94 // types to encode into. Can be at most these 3. Must match up with gExt[] 95 static const SkImageEncoder::Type gTypes[] = { 96 SkImageEncoder::kJPEG_Type, 97 SkImageEncoder::kPNG_Type 98 }; 99 100 // must match up with gTypes[] 101 static const char* const gExt[] = { 102 ".jpg", ".png" 103 }; 104 105 #include <sys/stat.h> 106 107 class EncodeView : public SampleView { 108 public: 109 SkBitmap* fBitmaps; 110 SkAutoDataUnref* fEncodedPNGs; 111 SkAutoDataUnref* fEncodedJPEGs; 112 int fBitmapCount; 113 114 EncodeView() { 115 fBitmapCount = SK_ARRAY_COUNT(gColorTypes); 116 fBitmaps = new SkBitmap[fBitmapCount]; 117 fEncodedPNGs = new SkAutoDataUnref[fBitmapCount]; 118 fEncodedJPEGs = new SkAutoDataUnref[fBitmapCount]; 119 for (int i = 0; i < fBitmapCount; i++) { 120 make_image(&fBitmaps[i], gColorTypes[i], i); 121 122 for (size_t j = 0; j < SK_ARRAY_COUNT(gTypes); j++) { 123 SkAutoTDelete<SkImageEncoder> codec( 124 SkImageEncoder::Create(gTypes[j])); 125 if (NULL == codec.get()) { 126 SkDebugf("[%s:%d] failed to encode %s%s\n", 127 __FILE__, __LINE__,gConfigLabels[i], gExt[j]); 128 continue; 129 } 130 SkAutoDataUnref data(codec->encodeData(fBitmaps[i], 100)); 131 if (NULL == data.get()) { 132 SkDebugf("[%s:%d] failed to encode %s%s\n", 133 __FILE__, __LINE__,gConfigLabels[i], gExt[j]); 134 continue; 135 } 136 if (SkImageEncoder::kJPEG_Type == gTypes[j]) { 137 fEncodedJPEGs[i].reset(data.detach()); 138 } else if (SkImageEncoder::kPNG_Type == gTypes[j]) { 139 fEncodedPNGs[i].reset(data.detach()); 140 } 141 } 142 } 143 this->setBGColor(0xFFDDDDDD); 144 } 145 146 virtual ~EncodeView() { 147 delete[] fBitmaps; 148 delete[] fEncodedPNGs; 149 delete[] fEncodedJPEGs; 150 } 151 152 protected: 153 // overrides from SkEventSink 154 virtual bool onQuery(SkEvent* evt) { 155 if (SampleCode::TitleQ(*evt)) { 156 SampleCode::TitleR(evt, "ImageEncoder"); 157 return true; 158 } 159 return this->INHERITED::onQuery(evt); 160 } 161 162 virtual void onDrawContent(SkCanvas* canvas) { 163 if (fBitmapCount == 0) { 164 return; 165 } 166 167 SkPaint paint; 168 paint.setAntiAlias(true); 169 paint.setTextAlign(SkPaint::kCenter_Align); 170 171 canvas->translate(SkIntToScalar(10), SkIntToScalar(20)); 172 173 SkScalar x = 0, y = 0, maxX = 0; 174 const int SPACER = 10; 175 176 for (int i = 0; i < fBitmapCount; i++) { 177 canvas->drawText(gConfigLabels[i], strlen(gConfigLabels[i]), 178 x + SkIntToScalar(fBitmaps[i].width()) / 2, 0, 179 paint); 180 y = paint.getTextSize(); 181 182 canvas->drawBitmap(fBitmaps[i], x, y); 183 184 SkScalar yy = y; 185 for (size_t j = 0; j < SK_ARRAY_COUNT(gTypes); j++) { 186 yy += SkIntToScalar(fBitmaps[i].height() + 10); 187 188 SkBitmap bm; 189 SkData* encoded = NULL; 190 if (SkImageEncoder::kJPEG_Type == gTypes[j]) { 191 encoded = fEncodedJPEGs[i].get(); 192 } else if (SkImageEncoder::kPNG_Type == gTypes[j]) { 193 encoded = fEncodedPNGs[i].get(); 194 } 195 if (encoded) { 196 if (!SkInstallDiscardablePixelRef(encoded, &bm)) { 197 SkDebugf("[%s:%d] failed to decode %s%s\n", 198 __FILE__, __LINE__,gConfigLabels[i], gExt[j]); 199 } 200 canvas->drawBitmap(bm, x, yy); 201 } 202 } 203 204 x += SkIntToScalar(fBitmaps[i].width() + SPACER); 205 if (x > maxX) { 206 maxX = x; 207 } 208 } 209 210 y = (paint.getTextSize() + SkIntToScalar(fBitmaps[0].height())) * 3 / 2; 211 x = maxX + SkIntToScalar(10); 212 paint.setTextAlign(SkPaint::kLeft_Align); 213 214 for (size_t j = 0; j < SK_ARRAY_COUNT(gExt); j++) { 215 canvas->drawText(gExt[j], strlen(gExt[j]), x, y, paint); 216 y += SkIntToScalar(fBitmaps[0].height() + SPACER); 217 } 218 } 219 220 virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, 221 unsigned modi) { 222 this->inval(NULL); 223 return this->INHERITED::onFindClickHandler(x, y, modi); 224 } 225 226 private: 227 typedef SampleView INHERITED; 228 }; 229 230 ////////////////////////////////////////////////////////////////////////////// 231 232 static SkView* MyFactory() { return new EncodeView; } 233 static SkViewRegister reg(MyFactory); 234
