1 #include "SkColorPriv.h" 2 #include "SkTableColorFilter.h" 3 #include "SkUnPreMultiply.h" 4 5 class SkTable_ColorFilter : public SkColorFilter { 6 public: 7 SkTable_ColorFilter(const uint8_t tableA[], const uint8_t tableR[], 8 const uint8_t tableG[], const uint8_t tableB[]) { 9 fBitmap = NULL; 10 fFlags = 0; 11 12 uint8_t* dst = fStorage; 13 if (tableA) { 14 memcpy(dst, tableA, 256); 15 dst += 256; 16 fFlags |= kA_Flag; 17 } 18 if (tableR) { 19 memcpy(dst, tableR, 256); 20 dst += 256; 21 fFlags |= kR_Flag; 22 } 23 if (tableG) { 24 memcpy(dst, tableG, 256); 25 dst += 256; 26 fFlags |= kG_Flag; 27 } 28 if (tableB) { 29 memcpy(dst, tableB, 256); 30 fFlags |= kB_Flag; 31 } 32 } 33 34 virtual bool asComponentTable(SkBitmap* table) SK_OVERRIDE; 35 36 virtual void filterSpan(const SkPMColor src[], int count, 37 SkPMColor dst[]) SK_OVERRIDE; 38 virtual void flatten(SkFlattenableWriteBuffer&) SK_OVERRIDE; 39 virtual Factory getFactory() SK_OVERRIDE; 40 41 static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) { 42 return SkNEW_ARGS(SkTable_ColorFilter, (buffer)); 43 } 44 45 protected: 46 SkTable_ColorFilter(SkFlattenableReadBuffer& buffer); 47 48 private: 49 SkBitmap* fBitmap; 50 51 enum { 52 kA_Flag = 1 << 0, 53 kR_Flag = 1 << 1, 54 kG_Flag = 1 << 2, 55 kB_Flag = 1 << 3, 56 }; 57 uint8_t fStorage[256 * 4]; 58 unsigned fFlags; 59 60 typedef SkColorFilter INHERITED; 61 }; 62 63 static const uint8_t gIdentityTable[] = { 64 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 65 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 66 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 67 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 68 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 69 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 70 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 71 0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F, 72 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 73 0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 74 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 75 0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F, 76 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 77 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 78 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 79 0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F, 80 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 81 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, 82 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 83 0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F, 84 0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 85 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, 86 0xB0, 0xB1, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 87 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, 88 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 89 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 90 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 91 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, 92 0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 93 0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF, 94 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 95 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF 96 }; 97 98 void SkTable_ColorFilter::filterSpan(const SkPMColor src[], int count, 99 SkPMColor dst[]) { 100 const uint8_t* table = fStorage; 101 const uint8_t* tableA = gIdentityTable; 102 const uint8_t* tableR = gIdentityTable; 103 const uint8_t* tableG = gIdentityTable; 104 const uint8_t* tableB = gIdentityTable; 105 if (fFlags & kA_Flag) { 106 tableA = table; table += 256; 107 } 108 if (fFlags & kR_Flag) { 109 tableR = table; table += 256; 110 } 111 if (fFlags & kG_Flag) { 112 tableG = table; table += 256; 113 } 114 if (fFlags & kB_Flag) { 115 tableB = table; 116 } 117 118 const SkUnPreMultiply::Scale* scaleTable = SkUnPreMultiply::GetScaleTable(); 119 for (int i = 0; i < count; ++i) { 120 SkPMColor c = src[i]; 121 unsigned a, r, g, b; 122 if (0 == c) { 123 a = r = g = b = 0; 124 } else { 125 a = SkGetPackedA32(c); 126 r = SkGetPackedR32(c); 127 g = SkGetPackedG32(c); 128 b = SkGetPackedB32(c); 129 130 if (a < 255) { 131 SkUnPreMultiply::Scale scale = scaleTable[a]; 132 r = SkUnPreMultiply::ApplyScale(scale, r); 133 g = SkUnPreMultiply::ApplyScale(scale, g); 134 b = SkUnPreMultiply::ApplyScale(scale, b); 135 } 136 } 137 dst[i] = SkPremultiplyARGBInline(tableA[a], tableR[r], 138 tableG[g], tableB[b]); 139 } 140 } 141 142 SkFlattenable::Factory SkTable_ColorFilter::getFactory() { 143 return CreateProc; 144 } 145 146 static const uint8_t gCountNibBits[] = { 147 0, 1, 1, 2, 148 1, 2, 2, 3, 149 1, 2, 2, 3, 150 2, 3, 3, 4 151 }; 152 153 #include "SkPackBits.h" 154 155 void SkTable_ColorFilter::flatten(SkFlattenableWriteBuffer& buffer) { 156 this->INHERITED::flatten(buffer); 157 158 uint8_t storage[5*256]; 159 int count = gCountNibBits[fFlags & 0xF]; 160 size_t size = SkPackBits::Pack8(fStorage, count * 256, storage); 161 SkASSERT(size <= sizeof(storage)); 162 163 // SkDebugf("raw %d packed %d\n", count * 256, size); 164 165 buffer.writeInt(fFlags); 166 buffer.writeInt(size); 167 buffer.write(storage, size); 168 } 169 170 SkTable_ColorFilter::SkTable_ColorFilter(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) { 171 fBitmap = NULL; 172 173 uint8_t storage[5*256]; 174 175 fFlags = buffer.readInt(); 176 size_t size = buffer.readInt(); 177 buffer.read(storage, size); 178 179 size_t raw = SkPackBits::Unpack8(storage, size, fStorage); 180 181 SkASSERT(raw <= sizeof(fStorage)); 182 size_t count = gCountNibBits[fFlags & 0xF]; 183 SkASSERT(raw == count * 256); 184 } 185 186 bool SkTable_ColorFilter::asComponentTable(SkBitmap* table) { 187 if (table) { 188 if (NULL == fBitmap) { 189 fBitmap = new SkBitmap; 190 fBitmap->setConfig(SkBitmap::kA8_Config, 256, 4, 256); 191 fBitmap->allocPixels(); 192 memcpy(fBitmap->getAddr8(0, 0), fStorage, 256 * 4); 193 } 194 *table = *fBitmap; 195 } 196 return true; 197 } 198 199 /////////////////////////////////////////////////////////////////////////////// 200 201 #ifdef SK_CPU_BENDIAN 202 #else 203 #define SK_A32_INDEX (3 - (SK_A32_SHIFT >> 3)) 204 #define SK_R32_INDEX (3 - (SK_R32_SHIFT >> 3)) 205 #define SK_G32_INDEX (3 - (SK_G32_SHIFT >> 3)) 206 #define SK_B32_INDEX (3 - (SK_B32_SHIFT >> 3)) 207 #endif 208 209 /////////////////////////////////////////////////////////////////////////////// 210 211 SkColorFilter* SkTableColorFilter::Create(const uint8_t table[256]) { 212 return SkNEW_ARGS(SkTable_ColorFilter, (table, table, table, table)); 213 } 214 215 SkColorFilter* SkTableColorFilter::CreateARGB(const uint8_t tableA[256], 216 const uint8_t tableR[256], 217 const uint8_t tableG[256], 218 const uint8_t tableB[256]) { 219 return SkNEW_ARGS(SkTable_ColorFilter, (tableA, tableR, tableG, tableB)); 220 } 221
