epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 1 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2 | /* |
epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 3 | * Copyright 2006 The Android Open Source Project |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 4 | * |
epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 5 | * Use of this source code is governed by a BSD-style license that can be |
| 6 | * found in the LICENSE file. |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 7 | */ |
| 8 | |
epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 9 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 10 | #include "SkXfermode.h" |
| 11 | #include "SkColorPriv.h" |
| 12 | |
| 13 | #define SkAlphaMulAlpha(a, b) SkMulDiv255Round(a, b) |
| 14 | |
| 15 | static SkPMColor SkFourByteInterp(SkPMColor src, SkPMColor dst, U8CPU alpha) { |
| 16 | unsigned scale = SkAlpha255To256(alpha); |
| 17 | |
| 18 | unsigned a = SkAlphaBlend(SkGetPackedA32(src), SkGetPackedA32(dst), scale); |
| 19 | unsigned r = SkAlphaBlend(SkGetPackedR32(src), SkGetPackedR32(dst), scale); |
| 20 | unsigned g = SkAlphaBlend(SkGetPackedG32(src), SkGetPackedG32(dst), scale); |
| 21 | unsigned b = SkAlphaBlend(SkGetPackedB32(src), SkGetPackedB32(dst), scale); |
| 22 | |
| 23 | return SkPackARGB32(a, r, g, b); |
| 24 | } |
| 25 | |
reed@android.com | fc25abd | 2009-01-15 14:38:33 +0000 | [diff] [blame] | 26 | #if 0 |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 27 | // idea for higher precision blends in xfer procs (and slightly faster) |
| 28 | // see DstATop as a probable caller |
| 29 | static U8CPU mulmuldiv255round(U8CPU a, U8CPU b, U8CPU c, U8CPU d) { |
| 30 | SkASSERT(a <= 255); |
| 31 | SkASSERT(b <= 255); |
| 32 | SkASSERT(c <= 255); |
| 33 | SkASSERT(d <= 255); |
| 34 | unsigned prod = SkMulS16(a, b) + SkMulS16(c, d) + 128; |
| 35 | unsigned result = (prod + (prod >> 8)) >> 8; |
| 36 | SkASSERT(result <= 255); |
| 37 | return result; |
| 38 | } |
reed@android.com | fc25abd | 2009-01-15 14:38:33 +0000 | [diff] [blame] | 39 | #endif |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 40 | |
deanm@chromium.org | da94699 | 2009-07-03 12:54:24 +0000 | [diff] [blame] | 41 | static inline unsigned saturated_add(unsigned a, unsigned b) { |
reed@android.com | 543ed93 | 2009-04-24 12:43:40 +0000 | [diff] [blame] | 42 | SkASSERT(a <= 255); |
| 43 | SkASSERT(b <= 255); |
| 44 | unsigned sum = a + b; |
| 45 | if (sum > 255) { |
| 46 | sum = 255; |
| 47 | } |
| 48 | return sum; |
| 49 | } |
| 50 | |
deanm@chromium.org | da94699 | 2009-07-03 12:54:24 +0000 | [diff] [blame] | 51 | static inline int clamp_signed_byte(int n) { |
reed@android.com | a0f5d15 | 2009-06-22 17:38:10 +0000 | [diff] [blame] | 52 | if (n < 0) { |
| 53 | n = 0; |
| 54 | } else if (n > 255) { |
| 55 | n = 255; |
| 56 | } |
| 57 | return n; |
| 58 | } |
| 59 | |
deanm@chromium.org | da94699 | 2009-07-03 12:54:24 +0000 | [diff] [blame] | 60 | static inline int clamp_div255round(int prod) { |
reed@android.com | a0f5d15 | 2009-06-22 17:38:10 +0000 | [diff] [blame] | 61 | if (prod <= 0) { |
| 62 | return 0; |
| 63 | } else if (prod >= 255*255) { |
| 64 | return 255; |
| 65 | } else { |
| 66 | return SkDiv255Round(prod); |
| 67 | } |
| 68 | } |
| 69 | |
deanm@chromium.org | da94699 | 2009-07-03 12:54:24 +0000 | [diff] [blame] | 70 | static inline int clamp_max(int value, int max) { |
reed@android.com | a0f5d15 | 2009-06-22 17:38:10 +0000 | [diff] [blame] | 71 | if (value > max) { |
| 72 | value = max; |
| 73 | } |
| 74 | return value; |
| 75 | } |
| 76 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 77 | /////////////////////////////////////////////////////////////////////////////// |
| 78 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 79 | // kClear_Mode, //!< [0, 0] |
| 80 | static SkPMColor clear_modeproc(SkPMColor src, SkPMColor dst) { |
| 81 | return 0; |
| 82 | } |
| 83 | |
| 84 | // kSrc_Mode, //!< [Sa, Sc] |
| 85 | static SkPMColor src_modeproc(SkPMColor src, SkPMColor dst) { |
| 86 | return src; |
| 87 | } |
| 88 | |
| 89 | // kDst_Mode, //!< [Da, Dc] |
| 90 | static SkPMColor dst_modeproc(SkPMColor src, SkPMColor dst) { |
| 91 | return dst; |
| 92 | } |
| 93 | |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 94 | // kSrcOver_Mode, //!< [Sa + Da - Sa*Da, Sc + (1 - Sa)*Dc] |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 95 | static SkPMColor srcover_modeproc(SkPMColor src, SkPMColor dst) { |
reed@android.com | 1116fb2 | 2009-03-03 20:31:12 +0000 | [diff] [blame] | 96 | #if 0 |
| 97 | // this is the old, more-correct way, but it doesn't guarantee that dst==255 |
| 98 | // will always stay opaque |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 99 | return src + SkAlphaMulQ(dst, SkAlpha255To256(255 - SkGetPackedA32(src))); |
reed@android.com | 1116fb2 | 2009-03-03 20:31:12 +0000 | [diff] [blame] | 100 | #else |
| 101 | // this is slightly faster, but more importantly guarantees that dst==255 |
| 102 | // will always stay opaque |
| 103 | return src + SkAlphaMulQ(dst, 256 - SkGetPackedA32(src)); |
| 104 | #endif |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 105 | } |
| 106 | |
reed@android.com | 1116fb2 | 2009-03-03 20:31:12 +0000 | [diff] [blame] | 107 | // kDstOver_Mode, //!< [Sa + Da - Sa*Da, Dc + (1 - Da)*Sc] |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 108 | static SkPMColor dstover_modeproc(SkPMColor src, SkPMColor dst) { |
reed@android.com | 1116fb2 | 2009-03-03 20:31:12 +0000 | [diff] [blame] | 109 | // this is the reverse of srcover, just flipping src and dst |
| 110 | // see srcover's comment about the 256 for opaqueness guarantees |
| 111 | return dst + SkAlphaMulQ(src, 256 - SkGetPackedA32(dst)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 112 | } |
| 113 | |
| 114 | // kSrcIn_Mode, //!< [Sa * Da, Sc * Da] |
| 115 | static SkPMColor srcin_modeproc(SkPMColor src, SkPMColor dst) { |
| 116 | return SkAlphaMulQ(src, SkAlpha255To256(SkGetPackedA32(dst))); |
| 117 | } |
| 118 | |
| 119 | // kDstIn_Mode, //!< [Sa * Da, Sa * Dc] |
| 120 | static SkPMColor dstin_modeproc(SkPMColor src, SkPMColor dst) { |
| 121 | return SkAlphaMulQ(dst, SkAlpha255To256(SkGetPackedA32(src))); |
| 122 | } |
| 123 | |
| 124 | // kSrcOut_Mode, //!< [Sa * (1 - Da), Sc * (1 - Da)] |
| 125 | static SkPMColor srcout_modeproc(SkPMColor src, SkPMColor dst) { |
| 126 | return SkAlphaMulQ(src, SkAlpha255To256(255 - SkGetPackedA32(dst))); |
| 127 | } |
| 128 | |
| 129 | // kDstOut_Mode, //!< [Da * (1 - Sa), Dc * (1 - Sa)] |
| 130 | static SkPMColor dstout_modeproc(SkPMColor src, SkPMColor dst) { |
| 131 | return SkAlphaMulQ(dst, SkAlpha255To256(255 - SkGetPackedA32(src))); |
| 132 | } |
| 133 | |
| 134 | // kSrcATop_Mode, //!< [Da, Sc * Da + (1 - Sa) * Dc] |
| 135 | static SkPMColor srcatop_modeproc(SkPMColor src, SkPMColor dst) { |
| 136 | unsigned sa = SkGetPackedA32(src); |
| 137 | unsigned da = SkGetPackedA32(dst); |
| 138 | unsigned isa = 255 - sa; |
| 139 | |
| 140 | return SkPackARGB32(da, |
| 141 | SkAlphaMulAlpha(da, SkGetPackedR32(src)) + |
| 142 | SkAlphaMulAlpha(isa, SkGetPackedR32(dst)), |
| 143 | SkAlphaMulAlpha(da, SkGetPackedG32(src)) + |
| 144 | SkAlphaMulAlpha(isa, SkGetPackedG32(dst)), |
| 145 | SkAlphaMulAlpha(da, SkGetPackedB32(src)) + |
| 146 | SkAlphaMulAlpha(isa, SkGetPackedB32(dst))); |
| 147 | } |
| 148 | |
| 149 | // kDstATop_Mode, //!< [Sa, Sa * Dc + Sc * (1 - Da)] |
| 150 | static SkPMColor dstatop_modeproc(SkPMColor src, SkPMColor dst) { |
| 151 | unsigned sa = SkGetPackedA32(src); |
| 152 | unsigned da = SkGetPackedA32(dst); |
| 153 | unsigned ida = 255 - da; |
| 154 | |
| 155 | return SkPackARGB32(sa, |
| 156 | SkAlphaMulAlpha(ida, SkGetPackedR32(src)) + |
| 157 | SkAlphaMulAlpha(sa, SkGetPackedR32(dst)), |
| 158 | SkAlphaMulAlpha(ida, SkGetPackedG32(src)) + |
| 159 | SkAlphaMulAlpha(sa, SkGetPackedG32(dst)), |
| 160 | SkAlphaMulAlpha(ida, SkGetPackedB32(src)) + |
| 161 | SkAlphaMulAlpha(sa, SkGetPackedB32(dst))); |
| 162 | } |
| 163 | |
| 164 | // kXor_Mode [Sa + Da - 2 * Sa * Da, Sc * (1 - Da) + (1 - Sa) * Dc] |
| 165 | static SkPMColor xor_modeproc(SkPMColor src, SkPMColor dst) { |
| 166 | unsigned sa = SkGetPackedA32(src); |
| 167 | unsigned da = SkGetPackedA32(dst); |
| 168 | unsigned isa = 255 - sa; |
| 169 | unsigned ida = 255 - da; |
| 170 | |
| 171 | return SkPackARGB32(sa + da - (SkAlphaMulAlpha(sa, da) << 1), |
| 172 | SkAlphaMulAlpha(ida, SkGetPackedR32(src)) + |
| 173 | SkAlphaMulAlpha(isa, SkGetPackedR32(dst)), |
| 174 | SkAlphaMulAlpha(ida, SkGetPackedG32(src)) + |
| 175 | SkAlphaMulAlpha(isa, SkGetPackedG32(dst)), |
| 176 | SkAlphaMulAlpha(ida, SkGetPackedB32(src)) + |
| 177 | SkAlphaMulAlpha(isa, SkGetPackedB32(dst))); |
| 178 | } |
| 179 | |
reed@android.com | a0f5d15 | 2009-06-22 17:38:10 +0000 | [diff] [blame] | 180 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 181 | |
reed@android.com | a0f5d15 | 2009-06-22 17:38:10 +0000 | [diff] [blame] | 182 | // kPlus_Mode |
| 183 | static SkPMColor plus_modeproc(SkPMColor src, SkPMColor dst) { |
reed@android.com | a0f5d15 | 2009-06-22 17:38:10 +0000 | [diff] [blame] | 184 | unsigned b = saturated_add(SkGetPackedB32(src), SkGetPackedB32(dst)); |
deanm@chromium.org | da94699 | 2009-07-03 12:54:24 +0000 | [diff] [blame] | 185 | unsigned g = saturated_add(SkGetPackedG32(src), SkGetPackedG32(dst)); |
| 186 | unsigned r = saturated_add(SkGetPackedR32(src), SkGetPackedR32(dst)); |
| 187 | unsigned a = saturated_add(SkGetPackedA32(src), SkGetPackedA32(dst)); |
reed@android.com | a0f5d15 | 2009-06-22 17:38:10 +0000 | [diff] [blame] | 188 | return SkPackARGB32(a, r, g, b); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 189 | } |
| 190 | |
reed@android.com | a0f5d15 | 2009-06-22 17:38:10 +0000 | [diff] [blame] | 191 | // kMultiply_Mode |
| 192 | static SkPMColor multiply_modeproc(SkPMColor src, SkPMColor dst) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 193 | int a = SkAlphaMulAlpha(SkGetPackedA32(src), SkGetPackedA32(dst)); |
| 194 | int r = SkAlphaMulAlpha(SkGetPackedR32(src), SkGetPackedR32(dst)); |
| 195 | int g = SkAlphaMulAlpha(SkGetPackedG32(src), SkGetPackedG32(dst)); |
| 196 | int b = SkAlphaMulAlpha(SkGetPackedB32(src), SkGetPackedB32(dst)); |
| 197 | return SkPackARGB32(a, r, g, b); |
| 198 | } |
| 199 | |
reed@android.com | a0f5d15 | 2009-06-22 17:38:10 +0000 | [diff] [blame] | 200 | // kScreen_Mode |
| 201 | static inline int srcover_byte(int a, int b) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 202 | return a + b - SkAlphaMulAlpha(a, b); |
| 203 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 204 | static SkPMColor screen_modeproc(SkPMColor src, SkPMColor dst) { |
reed@android.com | a0f5d15 | 2009-06-22 17:38:10 +0000 | [diff] [blame] | 205 | int a = srcover_byte(SkGetPackedA32(src), SkGetPackedA32(dst)); |
| 206 | int r = srcover_byte(SkGetPackedR32(src), SkGetPackedR32(dst)); |
| 207 | int g = srcover_byte(SkGetPackedG32(src), SkGetPackedG32(dst)); |
| 208 | int b = srcover_byte(SkGetPackedB32(src), SkGetPackedB32(dst)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 209 | return SkPackARGB32(a, r, g, b); |
| 210 | } |
| 211 | |
reed@android.com | a0f5d15 | 2009-06-22 17:38:10 +0000 | [diff] [blame] | 212 | // kOverlay_Mode |
| 213 | static inline int overlay_byte(int sc, int dc, int sa, int da) { |
| 214 | int tmp = sc * (255 - da) + dc * (255 - sa); |
| 215 | int rc; |
| 216 | if (2 * dc <= da) { |
| 217 | rc = 2 * sc * dc; |
| 218 | } else { |
| 219 | rc = sa * da - 2 * (da - dc) * (sa - sc); |
| 220 | } |
| 221 | return clamp_div255round(rc + tmp); |
| 222 | } |
| 223 | static SkPMColor overlay_modeproc(SkPMColor src, SkPMColor dst) { |
| 224 | int sa = SkGetPackedA32(src); |
| 225 | int da = SkGetPackedA32(dst); |
| 226 | int a = srcover_byte(sa, da); |
| 227 | int r = overlay_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); |
| 228 | int g = overlay_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); |
| 229 | int b = overlay_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); |
| 230 | return SkPackARGB32(a, r, g, b); |
| 231 | } |
| 232 | |
| 233 | // kDarken_Mode |
| 234 | static inline int darken_byte(int sc, int dc, int sa, int da) { |
| 235 | int sd = sc * da; |
| 236 | int ds = dc * sa; |
| 237 | if (sd < ds) { |
| 238 | // srcover |
| 239 | return sc + dc - SkDiv255Round(ds); |
| 240 | } else { |
| 241 | // dstover |
| 242 | return dc + sc - SkDiv255Round(sd); |
| 243 | } |
| 244 | } |
| 245 | static SkPMColor darken_modeproc(SkPMColor src, SkPMColor dst) { |
| 246 | int sa = SkGetPackedA32(src); |
| 247 | int da = SkGetPackedA32(dst); |
| 248 | int a = srcover_byte(sa, da); |
| 249 | int r = darken_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); |
| 250 | int g = darken_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); |
| 251 | int b = darken_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); |
| 252 | return SkPackARGB32(a, r, g, b); |
| 253 | } |
| 254 | |
| 255 | // kLighten_Mode |
| 256 | static inline int lighten_byte(int sc, int dc, int sa, int da) { |
| 257 | int sd = sc * da; |
| 258 | int ds = dc * sa; |
| 259 | if (sd > ds) { |
| 260 | // srcover |
| 261 | return sc + dc - SkDiv255Round(ds); |
| 262 | } else { |
| 263 | // dstover |
| 264 | return dc + sc - SkDiv255Round(sd); |
| 265 | } |
| 266 | } |
| 267 | static SkPMColor lighten_modeproc(SkPMColor src, SkPMColor dst) { |
| 268 | int sa = SkGetPackedA32(src); |
| 269 | int da = SkGetPackedA32(dst); |
| 270 | int a = srcover_byte(sa, da); |
| 271 | int r = lighten_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); |
| 272 | int g = lighten_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); |
| 273 | int b = lighten_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); |
| 274 | return SkPackARGB32(a, r, g, b); |
| 275 | } |
| 276 | |
| 277 | // kColorDodge_Mode |
| 278 | static inline int colordodge_byte(int sc, int dc, int sa, int da) { |
| 279 | int diff = sa - sc; |
| 280 | int rc; |
| 281 | if (0 == diff) { |
| 282 | rc = sa * da + sc * (255 - da) + dc * (255 - sa); |
| 283 | rc = SkDiv255Round(rc); |
| 284 | } else { |
| 285 | int tmp = (dc * sa << 15) / (da * diff); |
| 286 | rc = SkDiv255Round(sa * da) * tmp >> 15; |
| 287 | // don't clamp here, since we'll do it in our modeproc |
| 288 | } |
| 289 | return rc; |
| 290 | } |
| 291 | static SkPMColor colordodge_modeproc(SkPMColor src, SkPMColor dst) { |
| 292 | // added to avoid div-by-zero in colordodge_byte |
| 293 | if (0 == dst) { |
| 294 | return src; |
| 295 | } |
| 296 | |
| 297 | int sa = SkGetPackedA32(src); |
| 298 | int da = SkGetPackedA32(dst); |
| 299 | int a = srcover_byte(sa, da); |
| 300 | int r = colordodge_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); |
| 301 | int g = colordodge_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); |
| 302 | int b = colordodge_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); |
| 303 | r = clamp_max(r, a); |
| 304 | g = clamp_max(g, a); |
| 305 | b = clamp_max(b, a); |
| 306 | return SkPackARGB32(a, r, g, b); |
| 307 | } |
| 308 | |
| 309 | // kColorBurn_Mode |
| 310 | static inline int colorburn_byte(int sc, int dc, int sa, int da) { |
| 311 | int rc; |
| 312 | if (dc == da && 0 == sc) { |
| 313 | rc = sa * da + dc * (255 - sa); |
| 314 | } else if (0 == sc) { |
| 315 | return SkAlphaMulAlpha(dc, 255 - sa); |
| 316 | } else { |
| 317 | int tmp = (sa * (da - dc) * 256) / (sc * da); |
| 318 | if (tmp > 256) { |
| 319 | tmp = 256; |
| 320 | } |
| 321 | int tmp2 = sa * da; |
| 322 | rc = tmp2 - (tmp2 * tmp >> 8) + sc * (255 - da) + dc * (255 - sa); |
| 323 | } |
| 324 | return SkDiv255Round(rc); |
| 325 | } |
| 326 | static SkPMColor colorburn_modeproc(SkPMColor src, SkPMColor dst) { |
| 327 | // added to avoid div-by-zero in colorburn_byte |
| 328 | if (0 == dst) { |
| 329 | return src; |
| 330 | } |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 331 | |
reed@android.com | a0f5d15 | 2009-06-22 17:38:10 +0000 | [diff] [blame] | 332 | int sa = SkGetPackedA32(src); |
| 333 | int da = SkGetPackedA32(dst); |
| 334 | int a = srcover_byte(sa, da); |
| 335 | int r = colorburn_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); |
| 336 | int g = colorburn_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); |
| 337 | int b = colorburn_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); |
| 338 | return SkPackARGB32(a, r, g, b); |
| 339 | } |
| 340 | |
| 341 | // kHardLight_Mode |
| 342 | static inline int hardlight_byte(int sc, int dc, int sa, int da) { |
| 343 | int rc; |
| 344 | if (2 * sc <= sa) { |
| 345 | rc = 2 * sc * dc; |
| 346 | } else { |
| 347 | rc = sa * da - 2 * (da - dc) * (sa - sc); |
| 348 | } |
| 349 | return clamp_div255round(rc + sc * (255 - da) + dc * (255 - sa)); |
| 350 | } |
| 351 | static SkPMColor hardlight_modeproc(SkPMColor src, SkPMColor dst) { |
| 352 | int sa = SkGetPackedA32(src); |
| 353 | int da = SkGetPackedA32(dst); |
| 354 | int a = srcover_byte(sa, da); |
| 355 | int r = hardlight_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); |
| 356 | int g = hardlight_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); |
| 357 | int b = hardlight_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); |
| 358 | return SkPackARGB32(a, r, g, b); |
| 359 | } |
| 360 | |
| 361 | // returns 255 * sqrt(n/255) |
| 362 | static U8CPU sqrt_unit_byte(U8CPU n) { |
| 363 | return SkSqrtBits(n, 15+4); |
| 364 | } |
| 365 | |
| 366 | // kSoftLight_Mode |
| 367 | static inline int softlight_byte(int sc, int dc, int sa, int da) { |
| 368 | int m = da ? dc * 256 / da : 0; |
| 369 | int rc; |
| 370 | if (2 * sc <= sa) { |
| 371 | rc = dc * (sa + ((2 * sc - sa) * (256 - m) >> 8)); |
| 372 | } else if (4 * dc <= da) { |
| 373 | int tmp = (4 * m * (4 * m + 256) * (m - 256) >> 16) + 7 * m; |
| 374 | rc = dc * sa + (da * (2 * sc - sa) * tmp >> 8); |
| 375 | } else { |
| 376 | int tmp = sqrt_unit_byte(m) - m; |
| 377 | rc = dc * sa + (da * (2 * sc - sa) * tmp >> 8); |
| 378 | } |
| 379 | return clamp_div255round(rc + sc * (255 - da) + dc * (255 - sa)); |
| 380 | } |
| 381 | static SkPMColor softlight_modeproc(SkPMColor src, SkPMColor dst) { |
| 382 | int sa = SkGetPackedA32(src); |
| 383 | int da = SkGetPackedA32(dst); |
| 384 | int a = srcover_byte(sa, da); |
| 385 | int r = softlight_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); |
| 386 | int g = softlight_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); |
| 387 | int b = softlight_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); |
| 388 | return SkPackARGB32(a, r, g, b); |
| 389 | } |
| 390 | |
| 391 | // kDifference_Mode |
| 392 | static inline int difference_byte(int sc, int dc, int sa, int da) { |
| 393 | int tmp = SkMin32(sc * da, dc * sa); |
| 394 | return clamp_signed_byte(sc + dc - 2 * SkDiv255Round(tmp)); |
| 395 | } |
| 396 | static SkPMColor difference_modeproc(SkPMColor src, SkPMColor dst) { |
| 397 | int sa = SkGetPackedA32(src); |
| 398 | int da = SkGetPackedA32(dst); |
| 399 | int a = srcover_byte(sa, da); |
| 400 | int r = difference_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); |
| 401 | int g = difference_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); |
| 402 | int b = difference_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); |
| 403 | return SkPackARGB32(a, r, g, b); |
| 404 | } |
| 405 | |
| 406 | // kExclusion_Mode |
| 407 | static inline int exclusion_byte(int sc, int dc, int sa, int da) { |
| 408 | // this equations is wacky, wait for SVG to confirm it |
| 409 | int r = sc * da + dc * sa - 2 * sc * dc + sc * (255 - da) + dc * (255 - sa); |
| 410 | return clamp_div255round(r); |
| 411 | } |
| 412 | static SkPMColor exclusion_modeproc(SkPMColor src, SkPMColor dst) { |
| 413 | int sa = SkGetPackedA32(src); |
| 414 | int da = SkGetPackedA32(dst); |
| 415 | int a = srcover_byte(sa, da); |
| 416 | int r = exclusion_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); |
| 417 | int g = exclusion_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); |
| 418 | int b = exclusion_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); |
reed@android.com | 543ed93 | 2009-04-24 12:43:40 +0000 | [diff] [blame] | 419 | return SkPackARGB32(a, r, g, b); |
| 420 | } |
| 421 | |
vandebo@chromium.org | 4854327 | 2011-02-08 19:28:07 +0000 | [diff] [blame] | 422 | struct ProcCoeff { |
| 423 | SkXfermodeProc fProc; |
| 424 | SkXfermode::Coeff fSC; |
| 425 | SkXfermode::Coeff fDC; |
| 426 | }; |
| 427 | |
| 428 | #define CANNOT_USE_COEFF SkXfermode::Coeff(-1) |
| 429 | |
| 430 | static const ProcCoeff gProcCoeffs[] = { |
| 431 | { clear_modeproc, SkXfermode::kZero_Coeff, SkXfermode::kZero_Coeff }, |
| 432 | { src_modeproc, SkXfermode::kOne_Coeff, SkXfermode::kZero_Coeff }, |
| 433 | { dst_modeproc, SkXfermode::kZero_Coeff, SkXfermode::kOne_Coeff }, |
| 434 | { srcover_modeproc, SkXfermode::kOne_Coeff, SkXfermode::kISA_Coeff }, |
| 435 | { dstover_modeproc, SkXfermode::kIDA_Coeff, SkXfermode::kOne_Coeff }, |
| 436 | { srcin_modeproc, SkXfermode::kDA_Coeff, SkXfermode::kZero_Coeff }, |
| 437 | { dstin_modeproc, SkXfermode::kZero_Coeff, SkXfermode::kSA_Coeff }, |
| 438 | { srcout_modeproc, SkXfermode::kIDA_Coeff, SkXfermode::kZero_Coeff }, |
| 439 | { dstout_modeproc, SkXfermode::kZero_Coeff, SkXfermode::kISA_Coeff }, |
| 440 | { srcatop_modeproc, SkXfermode::kDA_Coeff, SkXfermode::kISA_Coeff }, |
| 441 | { dstatop_modeproc, SkXfermode::kIDA_Coeff, SkXfermode::kSA_Coeff }, |
| 442 | { xor_modeproc, SkXfermode::kIDA_Coeff, SkXfermode::kISA_Coeff }, |
| 443 | |
reed@google.com | 521e34e | 2011-04-12 18:55:21 +0000 | [diff] [blame] | 444 | { plus_modeproc, SkXfermode::kOne_Coeff, SkXfermode::kOne_Coeff }, |
| 445 | { multiply_modeproc,SkXfermode::kZero_Coeff, SkXfermode::kSC_Coeff }, |
vandebo@chromium.org | 4854327 | 2011-02-08 19:28:07 +0000 | [diff] [blame] | 446 | { screen_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, |
| 447 | { overlay_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, |
| 448 | { darken_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, |
| 449 | { lighten_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, |
| 450 | { colordodge_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, |
| 451 | { colorburn_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, |
| 452 | { hardlight_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, |
| 453 | { softlight_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, |
| 454 | { difference_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, |
| 455 | { exclusion_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, |
| 456 | }; |
| 457 | |
| 458 | /////////////////////////////////////////////////////////////////////////////// |
| 459 | |
| 460 | bool SkXfermode::asCoeff(Coeff* src, Coeff* dst) { |
| 461 | return false; |
| 462 | } |
| 463 | |
| 464 | bool SkXfermode::asMode(Mode* mode) { |
reed@google.com | c0d4aa2 | 2011-04-13 21:12:04 +0000 | [diff] [blame] | 465 | return false; |
vandebo@chromium.org | 4854327 | 2011-02-08 19:28:07 +0000 | [diff] [blame] | 466 | } |
| 467 | |
| 468 | SkPMColor SkXfermode::xferColor(SkPMColor src, SkPMColor dst) { |
| 469 | // no-op. subclasses should override this |
| 470 | return dst; |
| 471 | } |
| 472 | |
tomhudson@google.com | a87cd2a | 2011-06-15 16:50:27 +0000 | [diff] [blame] | 473 | void SkXfermode::xfer32(SkPMColor* SK_RESTRICT dst, |
| 474 | const SkPMColor* SK_RESTRICT src, int count, |
| 475 | const SkAlpha* SK_RESTRICT aa) { |
vandebo@chromium.org | 4854327 | 2011-02-08 19:28:07 +0000 | [diff] [blame] | 476 | SkASSERT(dst && src && count >= 0); |
| 477 | |
| 478 | if (NULL == aa) { |
| 479 | for (int i = count - 1; i >= 0; --i) { |
| 480 | dst[i] = this->xferColor(src[i], dst[i]); |
| 481 | } |
| 482 | } else { |
| 483 | for (int i = count - 1; i >= 0; --i) { |
| 484 | unsigned a = aa[i]; |
| 485 | if (0 != a) { |
| 486 | SkPMColor dstC = dst[i]; |
| 487 | SkPMColor C = this->xferColor(src[i], dstC); |
| 488 | if (0xFF != a) { |
| 489 | C = SkFourByteInterp(C, dstC, a); |
| 490 | } |
| 491 | dst[i] = C; |
| 492 | } |
| 493 | } |
| 494 | } |
| 495 | } |
| 496 | |
tomhudson@google.com | a87cd2a | 2011-06-15 16:50:27 +0000 | [diff] [blame] | 497 | void SkXfermode::xfer16(uint16_t* dst, |
| 498 | const SkPMColor* SK_RESTRICT src, int count, |
| 499 | const SkAlpha* SK_RESTRICT aa) { |
vandebo@chromium.org | 4854327 | 2011-02-08 19:28:07 +0000 | [diff] [blame] | 500 | SkASSERT(dst && src && count >= 0); |
| 501 | |
| 502 | if (NULL == aa) { |
| 503 | for (int i = count - 1; i >= 0; --i) { |
| 504 | SkPMColor dstC = SkPixel16ToPixel32(dst[i]); |
| 505 | dst[i] = SkPixel32ToPixel16_ToU16(this->xferColor(src[i], dstC)); |
| 506 | } |
| 507 | } else { |
| 508 | for (int i = count - 1; i >= 0; --i) { |
| 509 | unsigned a = aa[i]; |
| 510 | if (0 != a) { |
| 511 | SkPMColor dstC = SkPixel16ToPixel32(dst[i]); |
| 512 | SkPMColor C = this->xferColor(src[i], dstC); |
| 513 | if (0xFF != a) { |
| 514 | C = SkFourByteInterp(C, dstC, a); |
| 515 | } |
| 516 | dst[i] = SkPixel32ToPixel16_ToU16(C); |
| 517 | } |
| 518 | } |
| 519 | } |
| 520 | } |
| 521 | |
tomhudson@google.com | a87cd2a | 2011-06-15 16:50:27 +0000 | [diff] [blame] | 522 | void SkXfermode::xfer4444(SkPMColor16* SK_RESTRICT dst, |
| 523 | const SkPMColor* SK_RESTRICT src, int count, |
| 524 | const SkAlpha* SK_RESTRICT aa) |
vandebo@chromium.org | 4854327 | 2011-02-08 19:28:07 +0000 | [diff] [blame] | 525 | { |
| 526 | SkASSERT(dst && src && count >= 0); |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 527 | |
vandebo@chromium.org | 4854327 | 2011-02-08 19:28:07 +0000 | [diff] [blame] | 528 | if (NULL == aa) { |
| 529 | for (int i = count - 1; i >= 0; --i) { |
| 530 | SkPMColor dstC = SkPixel4444ToPixel32(dst[i]); |
| 531 | dst[i] = SkPixel32ToPixel4444(this->xferColor(src[i], dstC)); |
| 532 | } |
| 533 | } else { |
| 534 | for (int i = count - 1; i >= 0; --i) { |
| 535 | unsigned a = aa[i]; |
| 536 | if (0 != a) { |
| 537 | SkPMColor dstC = SkPixel4444ToPixel32(dst[i]); |
| 538 | SkPMColor C = this->xferColor(src[i], dstC); |
| 539 | if (0xFF != a) { |
| 540 | C = SkFourByteInterp(C, dstC, a); |
| 541 | } |
| 542 | dst[i] = SkPixel32ToPixel4444(C); |
| 543 | } |
| 544 | } |
| 545 | } |
| 546 | } |
| 547 | |
tomhudson@google.com | a87cd2a | 2011-06-15 16:50:27 +0000 | [diff] [blame] | 548 | void SkXfermode::xferA8(SkAlpha* SK_RESTRICT dst, |
vandebo@chromium.org | 4854327 | 2011-02-08 19:28:07 +0000 | [diff] [blame] | 549 | const SkPMColor src[], int count, |
tomhudson@google.com | a87cd2a | 2011-06-15 16:50:27 +0000 | [diff] [blame] | 550 | const SkAlpha* SK_RESTRICT aa) |
vandebo@chromium.org | 4854327 | 2011-02-08 19:28:07 +0000 | [diff] [blame] | 551 | { |
| 552 | SkASSERT(dst && src && count >= 0); |
| 553 | |
| 554 | if (NULL == aa) { |
| 555 | for (int i = count - 1; i >= 0; --i) { |
| 556 | SkPMColor res = this->xferColor(src[i], (dst[i] << SK_A32_SHIFT)); |
| 557 | dst[i] = SkToU8(SkGetPackedA32(res)); |
| 558 | } |
| 559 | } else { |
| 560 | for (int i = count - 1; i >= 0; --i) { |
| 561 | unsigned a = aa[i]; |
| 562 | if (0 != a) { |
| 563 | SkAlpha dstA = dst[i]; |
| 564 | unsigned A = SkGetPackedA32(this->xferColor(src[i], |
| 565 | (SkPMColor)(dstA << SK_A32_SHIFT))); |
| 566 | if (0xFF != a) { |
| 567 | A = SkAlphaBlend(A, dstA, SkAlpha255To256(a)); |
| 568 | } |
| 569 | dst[i] = SkToU8(A); |
| 570 | } |
| 571 | } |
| 572 | } |
| 573 | } |
| 574 | |
| 575 | /////////////////////////////////////////////////////////////////////////////// |
| 576 | |
tomhudson@google.com | a87cd2a | 2011-06-15 16:50:27 +0000 | [diff] [blame] | 577 | void SkProcXfermode::xfer32(SkPMColor* SK_RESTRICT dst, |
| 578 | const SkPMColor* SK_RESTRICT src, int count, |
| 579 | const SkAlpha* SK_RESTRICT aa) { |
vandebo@chromium.org | 4854327 | 2011-02-08 19:28:07 +0000 | [diff] [blame] | 580 | SkASSERT(dst && src && count >= 0); |
| 581 | |
| 582 | SkXfermodeProc proc = fProc; |
| 583 | |
| 584 | if (NULL != proc) { |
| 585 | if (NULL == aa) { |
| 586 | for (int i = count - 1; i >= 0; --i) { |
| 587 | dst[i] = proc(src[i], dst[i]); |
| 588 | } |
| 589 | } else { |
| 590 | for (int i = count - 1; i >= 0; --i) { |
| 591 | unsigned a = aa[i]; |
| 592 | if (0 != a) { |
| 593 | SkPMColor dstC = dst[i]; |
| 594 | SkPMColor C = proc(src[i], dstC); |
| 595 | if (a != 0xFF) { |
| 596 | C = SkFourByteInterp(C, dstC, a); |
| 597 | } |
| 598 | dst[i] = C; |
| 599 | } |
| 600 | } |
| 601 | } |
| 602 | } |
| 603 | } |
| 604 | |
tomhudson@google.com | a87cd2a | 2011-06-15 16:50:27 +0000 | [diff] [blame] | 605 | void SkProcXfermode::xfer16(uint16_t* SK_RESTRICT dst, |
| 606 | const SkPMColor* SK_RESTRICT src, int count, |
| 607 | const SkAlpha* SK_RESTRICT aa) { |
vandebo@chromium.org | 4854327 | 2011-02-08 19:28:07 +0000 | [diff] [blame] | 608 | SkASSERT(dst && src && count >= 0); |
| 609 | |
| 610 | SkXfermodeProc proc = fProc; |
| 611 | |
| 612 | if (NULL != proc) { |
| 613 | if (NULL == aa) { |
| 614 | for (int i = count - 1; i >= 0; --i) { |
| 615 | SkPMColor dstC = SkPixel16ToPixel32(dst[i]); |
| 616 | dst[i] = SkPixel32ToPixel16_ToU16(proc(src[i], dstC)); |
| 617 | } |
| 618 | } else { |
| 619 | for (int i = count - 1; i >= 0; --i) { |
| 620 | unsigned a = aa[i]; |
| 621 | if (0 != a) { |
| 622 | SkPMColor dstC = SkPixel16ToPixel32(dst[i]); |
| 623 | SkPMColor C = proc(src[i], dstC); |
| 624 | if (0xFF != a) { |
| 625 | C = SkFourByteInterp(C, dstC, a); |
| 626 | } |
| 627 | dst[i] = SkPixel32ToPixel16_ToU16(C); |
| 628 | } |
| 629 | } |
| 630 | } |
| 631 | } |
| 632 | } |
| 633 | |
tomhudson@google.com | a87cd2a | 2011-06-15 16:50:27 +0000 | [diff] [blame] | 634 | void SkProcXfermode::xfer4444(SkPMColor16* SK_RESTRICT dst, |
| 635 | const SkPMColor* SK_RESTRICT src, int count, |
| 636 | const SkAlpha* SK_RESTRICT aa) { |
vandebo@chromium.org | 4854327 | 2011-02-08 19:28:07 +0000 | [diff] [blame] | 637 | SkASSERT(dst && src && count >= 0); |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 638 | |
vandebo@chromium.org | 4854327 | 2011-02-08 19:28:07 +0000 | [diff] [blame] | 639 | SkXfermodeProc proc = fProc; |
| 640 | |
| 641 | if (NULL != proc) { |
| 642 | if (NULL == aa) { |
| 643 | for (int i = count - 1; i >= 0; --i) { |
| 644 | SkPMColor dstC = SkPixel4444ToPixel32(dst[i]); |
| 645 | dst[i] = SkPixel32ToPixel4444(proc(src[i], dstC)); |
| 646 | } |
| 647 | } else { |
| 648 | for (int i = count - 1; i >= 0; --i) { |
| 649 | unsigned a = aa[i]; |
| 650 | if (0 != a) { |
| 651 | SkPMColor dstC = SkPixel4444ToPixel32(dst[i]); |
| 652 | SkPMColor C = proc(src[i], dstC); |
| 653 | if (0xFF != a) { |
| 654 | C = SkFourByteInterp(C, dstC, a); |
| 655 | } |
| 656 | dst[i] = SkPixel32ToPixel4444(C); |
| 657 | } |
| 658 | } |
| 659 | } |
| 660 | } |
| 661 | } |
| 662 | |
tomhudson@google.com | a87cd2a | 2011-06-15 16:50:27 +0000 | [diff] [blame] | 663 | void SkProcXfermode::xferA8(SkAlpha* SK_RESTRICT dst, |
| 664 | const SkPMColor* SK_RESTRICT src, int count, |
| 665 | const SkAlpha* SK_RESTRICT aa) { |
vandebo@chromium.org | 4854327 | 2011-02-08 19:28:07 +0000 | [diff] [blame] | 666 | SkASSERT(dst && src && count >= 0); |
| 667 | |
| 668 | SkXfermodeProc proc = fProc; |
| 669 | |
| 670 | if (NULL != proc) { |
| 671 | if (NULL == aa) { |
| 672 | for (int i = count - 1; i >= 0; --i) { |
| 673 | SkPMColor res = proc(src[i], dst[i] << SK_A32_SHIFT); |
| 674 | dst[i] = SkToU8(SkGetPackedA32(res)); |
| 675 | } |
| 676 | } else { |
| 677 | for (int i = count - 1; i >= 0; --i) { |
| 678 | unsigned a = aa[i]; |
| 679 | if (0 != a) { |
| 680 | SkAlpha dstA = dst[i]; |
| 681 | SkPMColor res = proc(src[i], dstA << SK_A32_SHIFT); |
| 682 | unsigned A = SkGetPackedA32(res); |
| 683 | if (0xFF != a) { |
| 684 | A = SkAlphaBlend(A, dstA, SkAlpha255To256(a)); |
| 685 | } |
| 686 | dst[i] = SkToU8(A); |
| 687 | } |
| 688 | } |
| 689 | } |
| 690 | } |
| 691 | } |
| 692 | |
| 693 | SkProcXfermode::SkProcXfermode(SkFlattenableReadBuffer& buffer) |
| 694 | : SkXfermode(buffer) { |
yangsu@google.com | f468e47 | 2011-08-10 18:34:50 +0000 | [diff] [blame] | 695 | // Might be a NULL if the Xfermode is recorded using the CrossProcess flag |
vandebo@chromium.org | 4854327 | 2011-02-08 19:28:07 +0000 | [diff] [blame] | 696 | fProc = (SkXfermodeProc)buffer.readFunctionPtr(); |
| 697 | } |
| 698 | |
| 699 | void SkProcXfermode::flatten(SkFlattenableWriteBuffer& buffer) { |
yangsu@google.com | f468e47 | 2011-08-10 18:34:50 +0000 | [diff] [blame] | 700 | if (buffer.isCrossProcess()) { |
| 701 | // function pointer is only valid in the current process. Write a NULL |
| 702 | // so it can't be accidentally used |
| 703 | buffer.writeFunctionPtr(NULL); |
| 704 | } else { |
| 705 | buffer.writeFunctionPtr((void*)fProc); |
| 706 | } |
vandebo@chromium.org | 4854327 | 2011-02-08 19:28:07 +0000 | [diff] [blame] | 707 | } |
| 708 | |
vandebo@chromium.org | 4854327 | 2011-02-08 19:28:07 +0000 | [diff] [blame] | 709 | /////////////////////////////////////////////////////////////////////////////// |
| 710 | /////////////////////////////////////////////////////////////////////////////// |
| 711 | |
| 712 | class SkProcCoeffXfermode : public SkProcXfermode { |
| 713 | public: |
reed@google.com | c0d4aa2 | 2011-04-13 21:12:04 +0000 | [diff] [blame] | 714 | SkProcCoeffXfermode(const ProcCoeff& rec, Mode mode) |
| 715 | : INHERITED(rec.fProc) { |
| 716 | fMode = mode; |
| 717 | // these may be valid, or may be CANNOT_USE_COEFF |
| 718 | fSrcCoeff = rec.fSC; |
| 719 | fDstCoeff = rec.fDC; |
vandebo@chromium.org | 4854327 | 2011-02-08 19:28:07 +0000 | [diff] [blame] | 720 | } |
reed@google.com | c0d4aa2 | 2011-04-13 21:12:04 +0000 | [diff] [blame] | 721 | |
| 722 | virtual bool asMode(Mode* mode) { |
| 723 | if (mode) { |
| 724 | *mode = fMode; |
| 725 | } |
| 726 | return true; |
| 727 | } |
| 728 | |
vandebo@chromium.org | 4854327 | 2011-02-08 19:28:07 +0000 | [diff] [blame] | 729 | virtual bool asCoeff(Coeff* sc, Coeff* dc) { |
reed@google.com | c0d4aa2 | 2011-04-13 21:12:04 +0000 | [diff] [blame] | 730 | if (CANNOT_USE_COEFF == fSrcCoeff) { |
| 731 | return false; |
| 732 | } |
| 733 | |
vandebo@chromium.org | 4854327 | 2011-02-08 19:28:07 +0000 | [diff] [blame] | 734 | if (sc) { |
| 735 | *sc = fSrcCoeff; |
| 736 | } |
| 737 | if (dc) { |
| 738 | *dc = fDstCoeff; |
| 739 | } |
| 740 | return true; |
| 741 | } |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 742 | |
vandebo@chromium.org | 4854327 | 2011-02-08 19:28:07 +0000 | [diff] [blame] | 743 | virtual Factory getFactory() { return CreateProc; } |
| 744 | virtual void flatten(SkFlattenableWriteBuffer& buffer) { |
| 745 | this->INHERITED::flatten(buffer); |
reed@google.com | c0d4aa2 | 2011-04-13 21:12:04 +0000 | [diff] [blame] | 746 | buffer.write32(fMode); |
vandebo@chromium.org | 4854327 | 2011-02-08 19:28:07 +0000 | [diff] [blame] | 747 | } |
| 748 | |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 749 | static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) { |
| 750 | return SkNEW_ARGS(SkProcCoeffXfermode, (buffer)); |
| 751 | } |
| 752 | |
vandebo@chromium.org | 4854327 | 2011-02-08 19:28:07 +0000 | [diff] [blame] | 753 | protected: |
| 754 | SkProcCoeffXfermode(SkFlattenableReadBuffer& buffer) |
| 755 | : INHERITED(buffer) { |
reed@google.com | c0d4aa2 | 2011-04-13 21:12:04 +0000 | [diff] [blame] | 756 | fMode = (SkXfermode::Mode)buffer.readU32(); |
reed@google.com | c34d7cf | 2011-08-09 22:42:10 +0000 | [diff] [blame] | 757 | |
| 758 | const ProcCoeff& rec = gProcCoeffs[fMode]; |
| 759 | // these may be valid, or may be CANNOT_USE_COEFF |
| 760 | fSrcCoeff = rec.fSC; |
| 761 | fDstCoeff = rec.fDC; |
| 762 | // now update our function-ptr in the super class |
| 763 | this->INHERITED::setProc(rec.fProc); |
vandebo@chromium.org | 4854327 | 2011-02-08 19:28:07 +0000 | [diff] [blame] | 764 | } |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 765 | |
vandebo@chromium.org | 4854327 | 2011-02-08 19:28:07 +0000 | [diff] [blame] | 766 | private: |
reed@google.com | c0d4aa2 | 2011-04-13 21:12:04 +0000 | [diff] [blame] | 767 | Mode fMode; |
vandebo@chromium.org | 4854327 | 2011-02-08 19:28:07 +0000 | [diff] [blame] | 768 | Coeff fSrcCoeff, fDstCoeff; |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 769 | |
vandebo@chromium.org | 4854327 | 2011-02-08 19:28:07 +0000 | [diff] [blame] | 770 | |
| 771 | typedef SkProcXfermode INHERITED; |
| 772 | }; |
| 773 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 774 | /////////////////////////////////////////////////////////////////////////////// |
| 775 | |
| 776 | class SkClearXfermode : public SkProcCoeffXfermode { |
| 777 | public: |
reed@google.com | c0d4aa2 | 2011-04-13 21:12:04 +0000 | [diff] [blame] | 778 | SkClearXfermode(const ProcCoeff& rec) : SkProcCoeffXfermode(rec, kClear_Mode) {} |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 779 | |
tomhudson@google.com | a87cd2a | 2011-06-15 16:50:27 +0000 | [diff] [blame] | 780 | virtual void xfer32(SkPMColor* SK_RESTRICT dst, |
| 781 | const SkPMColor* SK_RESTRICT, int count, |
| 782 | const SkAlpha* SK_RESTRICT aa) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 783 | SkASSERT(dst && count >= 0); |
| 784 | |
| 785 | if (NULL == aa) { |
| 786 | memset(dst, 0, count << 2); |
| 787 | } else { |
| 788 | for (int i = count - 1; i >= 0; --i) { |
| 789 | unsigned a = aa[i]; |
| 790 | if (0xFF == a) { |
| 791 | dst[i] = 0; |
| 792 | } else if (a != 0) { |
| 793 | dst[i] = SkAlphaMulQ(dst[i], SkAlpha255To256(255 - a)); |
| 794 | } |
| 795 | } |
| 796 | } |
| 797 | } |
tomhudson@google.com | a87cd2a | 2011-06-15 16:50:27 +0000 | [diff] [blame] | 798 | virtual void xferA8(SkAlpha* SK_RESTRICT dst, |
| 799 | const SkPMColor* SK_RESTRICT, int count, |
| 800 | const SkAlpha* SK_RESTRICT aa) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 801 | SkASSERT(dst && count >= 0); |
| 802 | |
| 803 | if (NULL == aa) { |
| 804 | memset(dst, 0, count); |
| 805 | } else { |
| 806 | for (int i = count - 1; i >= 0; --i) { |
| 807 | unsigned a = aa[i]; |
| 808 | if (0xFF == a) { |
| 809 | dst[i] = 0; |
| 810 | } else if (0 != a) { |
| 811 | dst[i] = SkAlphaMulAlpha(dst[i], 255 - a); |
| 812 | } |
| 813 | } |
| 814 | } |
| 815 | } |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 816 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 817 | virtual Factory getFactory() { return CreateProc; } |
| 818 | |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 819 | static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) { |
| 820 | return SkNEW_ARGS(SkClearXfermode, (buffer)); |
| 821 | } |
| 822 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 823 | private: |
| 824 | SkClearXfermode(SkFlattenableReadBuffer& buffer) |
| 825 | : SkProcCoeffXfermode(buffer) {} |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 826 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 827 | }; |
| 828 | |
| 829 | /////////////////////////////////////////////////////////////////////////////// |
| 830 | |
| 831 | class SkSrcXfermode : public SkProcCoeffXfermode { |
| 832 | public: |
reed@google.com | c0d4aa2 | 2011-04-13 21:12:04 +0000 | [diff] [blame] | 833 | SkSrcXfermode(const ProcCoeff& rec) : SkProcCoeffXfermode(rec, kSrc_Mode) {} |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 834 | |
tomhudson@google.com | a87cd2a | 2011-06-15 16:50:27 +0000 | [diff] [blame] | 835 | virtual void xfer32(SkPMColor* SK_RESTRICT dst, |
| 836 | const SkPMColor* SK_RESTRICT src, int count, |
| 837 | const SkAlpha* SK_RESTRICT aa) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 838 | SkASSERT(dst && src && count >= 0); |
| 839 | |
| 840 | if (NULL == aa) { |
| 841 | memcpy(dst, src, count << 2); |
| 842 | } else { |
| 843 | for (int i = count - 1; i >= 0; --i) { |
| 844 | unsigned a = aa[i]; |
| 845 | if (a == 0xFF) { |
| 846 | dst[i] = src[i]; |
| 847 | } else if (a != 0) { |
| 848 | dst[i] = SkFourByteInterp(src[i], dst[i], a); |
| 849 | } |
| 850 | } |
| 851 | } |
| 852 | } |
| 853 | |
tomhudson@google.com | a87cd2a | 2011-06-15 16:50:27 +0000 | [diff] [blame] | 854 | virtual void xferA8(SkAlpha* SK_RESTRICT dst, |
| 855 | const SkPMColor* SK_RESTRICT src, int count, |
| 856 | const SkAlpha* SK_RESTRICT aa) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 857 | SkASSERT(dst && src && count >= 0); |
| 858 | |
| 859 | if (NULL == aa) { |
| 860 | for (int i = count - 1; i >= 0; --i) { |
| 861 | dst[i] = SkToU8(SkGetPackedA32(src[i])); |
| 862 | } |
| 863 | } else { |
| 864 | for (int i = count - 1; i >= 0; --i) { |
| 865 | unsigned a = aa[i]; |
| 866 | if (0 != a) { |
| 867 | unsigned srcA = SkGetPackedA32(src[i]); |
| 868 | if (a == 0xFF) { |
| 869 | dst[i] = SkToU8(srcA); |
| 870 | } else { |
| 871 | dst[i] = SkToU8(SkAlphaBlend(srcA, dst[i], a)); |
| 872 | } |
| 873 | } |
| 874 | } |
| 875 | } |
| 876 | } |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 877 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 878 | virtual Factory getFactory() { return CreateProc; } |
| 879 | |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 880 | static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) { |
| 881 | return SkNEW_ARGS(SkSrcXfermode, (buffer)); |
| 882 | } |
| 883 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 884 | private: |
| 885 | SkSrcXfermode(SkFlattenableReadBuffer& buffer) |
| 886 | : SkProcCoeffXfermode(buffer) {} |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 887 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 888 | }; |
| 889 | |
| 890 | class SkDstInXfermode : public SkProcCoeffXfermode { |
| 891 | public: |
reed@google.com | c0d4aa2 | 2011-04-13 21:12:04 +0000 | [diff] [blame] | 892 | SkDstInXfermode(const ProcCoeff& rec) : SkProcCoeffXfermode(rec, kDstIn_Mode) {} |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 893 | |
tomhudson@google.com | a87cd2a | 2011-06-15 16:50:27 +0000 | [diff] [blame] | 894 | virtual void xfer32(SkPMColor* SK_RESTRICT dst, |
| 895 | const SkPMColor* SK_RESTRICT src, int count, |
| 896 | const SkAlpha* SK_RESTRICT aa) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 897 | SkASSERT(dst && src); |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 898 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 899 | if (count <= 0) { |
| 900 | return; |
| 901 | } |
| 902 | if (NULL != aa) { |
| 903 | return this->INHERITED::xfer32(dst, src, count, aa); |
| 904 | } |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 905 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 906 | do { |
| 907 | unsigned a = SkGetPackedA32(*src); |
| 908 | *dst = SkAlphaMulQ(*dst, SkAlpha255To256(a)); |
| 909 | dst++; |
| 910 | src++; |
| 911 | } while (--count != 0); |
| 912 | } |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 913 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 914 | virtual Factory getFactory() { return CreateProc; } |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 915 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 916 | static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) { |
| 917 | return SkNEW_ARGS(SkDstInXfermode, (buffer)); |
| 918 | } |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 919 | |
| 920 | private: |
| 921 | SkDstInXfermode(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) {} |
| 922 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 923 | typedef SkProcCoeffXfermode INHERITED; |
| 924 | }; |
| 925 | |
| 926 | class SkDstOutXfermode : public SkProcCoeffXfermode { |
| 927 | public: |
reed@google.com | c0d4aa2 | 2011-04-13 21:12:04 +0000 | [diff] [blame] | 928 | SkDstOutXfermode(const ProcCoeff& rec) : SkProcCoeffXfermode(rec, kDstOut_Mode) {} |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 929 | |
tomhudson@google.com | a87cd2a | 2011-06-15 16:50:27 +0000 | [diff] [blame] | 930 | virtual void xfer32(SkPMColor* SK_RESTRICT dst, |
| 931 | const SkPMColor* SK_RESTRICT src, int count, |
| 932 | const SkAlpha* SK_RESTRICT aa) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 933 | SkASSERT(dst && src); |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 934 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 935 | if (count <= 0) { |
| 936 | return; |
| 937 | } |
| 938 | if (NULL != aa) { |
| 939 | return this->INHERITED::xfer32(dst, src, count, aa); |
| 940 | } |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 941 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 942 | do { |
| 943 | unsigned a = SkGetPackedA32(*src); |
| 944 | *dst = SkAlphaMulQ(*dst, SkAlpha255To256(255 - a)); |
| 945 | dst++; |
| 946 | src++; |
| 947 | } while (--count != 0); |
| 948 | } |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 949 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 950 | virtual Factory getFactory() { return CreateProc; } |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 951 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 952 | static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) { |
| 953 | return SkNEW_ARGS(SkDstOutXfermode, (buffer)); |
| 954 | } |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 955 | |
| 956 | private: |
| 957 | SkDstOutXfermode(SkFlattenableReadBuffer& buffer) |
| 958 | : INHERITED(buffer) {} |
| 959 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 960 | typedef SkProcCoeffXfermode INHERITED; |
| 961 | }; |
| 962 | |
| 963 | /////////////////////////////////////////////////////////////////////////////// |
| 964 | |
reed@android.com | a0f5d15 | 2009-06-22 17:38:10 +0000 | [diff] [blame] | 965 | SkXfermode* SkXfermode::Create(Mode mode) { |
| 966 | SkASSERT(SK_ARRAY_COUNT(gProcCoeffs) == kModeCount); |
| 967 | SkASSERT((unsigned)mode < kModeCount); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 968 | |
reed@google.com | c0d4aa2 | 2011-04-13 21:12:04 +0000 | [diff] [blame] | 969 | const ProcCoeff& rec = gProcCoeffs[mode]; |
| 970 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 971 | switch (mode) { |
| 972 | case kClear_Mode: |
reed@google.com | c0d4aa2 | 2011-04-13 21:12:04 +0000 | [diff] [blame] | 973 | return SkNEW_ARGS(SkClearXfermode, (rec)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 974 | case kSrc_Mode: |
reed@google.com | c0d4aa2 | 2011-04-13 21:12:04 +0000 | [diff] [blame] | 975 | return SkNEW_ARGS(SkSrcXfermode, (rec)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 976 | case kSrcOver_Mode: |
| 977 | return NULL; |
| 978 | case kDstIn_Mode: |
reed@google.com | c0d4aa2 | 2011-04-13 21:12:04 +0000 | [diff] [blame] | 979 | return SkNEW_ARGS(SkDstInXfermode, (rec)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 980 | case kDstOut_Mode: |
reed@google.com | c0d4aa2 | 2011-04-13 21:12:04 +0000 | [diff] [blame] | 981 | return SkNEW_ARGS(SkDstOutXfermode, (rec)); |
| 982 | default: |
| 983 | return SkNEW_ARGS(SkProcCoeffXfermode, (rec, mode)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 984 | } |
| 985 | } |
| 986 | |
reed@google.com | 43c50c8 | 2011-04-14 15:50:52 +0000 | [diff] [blame] | 987 | SkXfermodeProc SkXfermode::GetProc(Mode mode) { |
| 988 | SkXfermodeProc proc = NULL; |
| 989 | if ((unsigned)mode < kModeCount) { |
| 990 | proc = gProcCoeffs[mode].fProc; |
| 991 | } |
| 992 | return proc; |
| 993 | } |
| 994 | |
| 995 | bool SkXfermode::ModeAsCoeff(Mode mode, Coeff* src, Coeff* dst) { |
| 996 | SkASSERT(SK_ARRAY_COUNT(gProcCoeffs) == kModeCount); |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 997 | |
reed@google.com | 43c50c8 | 2011-04-14 15:50:52 +0000 | [diff] [blame] | 998 | if ((unsigned)mode >= (unsigned)kModeCount) { |
| 999 | // illegal mode parameter |
| 1000 | return false; |
| 1001 | } |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 1002 | |
reed@google.com | 43c50c8 | 2011-04-14 15:50:52 +0000 | [diff] [blame] | 1003 | const ProcCoeff& rec = gProcCoeffs[mode]; |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 1004 | |
reed@google.com | 43c50c8 | 2011-04-14 15:50:52 +0000 | [diff] [blame] | 1005 | if (CANNOT_USE_COEFF == rec.fSC) { |
| 1006 | return false; |
| 1007 | } |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 1008 | |
reed@google.com | 43c50c8 | 2011-04-14 15:50:52 +0000 | [diff] [blame] | 1009 | SkASSERT(CANNOT_USE_COEFF != rec.fDC); |
| 1010 | if (src) { |
| 1011 | *src = rec.fSC; |
| 1012 | } |
| 1013 | if (dst) { |
| 1014 | *dst = rec.fDC; |
| 1015 | } |
| 1016 | return true; |
| 1017 | } |
| 1018 | |
| 1019 | bool SkXfermode::AsMode(SkXfermode* xfer, Mode* mode) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1020 | if (NULL == xfer) { |
| 1021 | if (mode) { |
| 1022 | *mode = kSrcOver_Mode; |
| 1023 | } |
| 1024 | return true; |
| 1025 | } |
reed@google.com | c0d4aa2 | 2011-04-13 21:12:04 +0000 | [diff] [blame] | 1026 | return xfer->asMode(mode); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1027 | } |
| 1028 | |
reed@google.com | 43c50c8 | 2011-04-14 15:50:52 +0000 | [diff] [blame] | 1029 | bool SkXfermode::AsCoeff(SkXfermode* xfer, Coeff* src, Coeff* dst) { |
| 1030 | if (NULL == xfer) { |
| 1031 | return ModeAsCoeff(kSrcOver_Mode, src, dst); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1032 | } |
reed@google.com | 43c50c8 | 2011-04-14 15:50:52 +0000 | [diff] [blame] | 1033 | return xfer->asCoeff(src, dst); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1034 | } |
| 1035 | |
mike@reedtribe.org | e303fcf | 2011-11-17 02:16:43 +0000 | [diff] [blame^] | 1036 | bool SkXfermode::IsMode(SkXfermode* xfer, Mode mode) { |
| 1037 | // if xfer==null then the mode is srcover |
| 1038 | Mode m = kSrcOver_Mode; |
| 1039 | if (xfer && !xfer->asMode(&m)) { |
| 1040 | return false; |
| 1041 | } |
| 1042 | return mode == m; |
| 1043 | } |
| 1044 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1045 | /////////////////////////////////////////////////////////////////////////////// |
| 1046 | //////////// 16bit xfermode procs |
| 1047 | |
| 1048 | #ifdef SK_DEBUG |
| 1049 | static bool require_255(SkPMColor src) { return SkGetPackedA32(src) == 0xFF; } |
| 1050 | static bool require_0(SkPMColor src) { return SkGetPackedA32(src) == 0; } |
| 1051 | #endif |
| 1052 | |
| 1053 | static uint16_t src_modeproc16_255(SkPMColor src, uint16_t dst) { |
| 1054 | SkASSERT(require_255(src)); |
| 1055 | return SkPixel32ToPixel16(src); |
| 1056 | } |
| 1057 | |
| 1058 | static uint16_t dst_modeproc16(SkPMColor src, uint16_t dst) { |
| 1059 | return dst; |
| 1060 | } |
| 1061 | |
| 1062 | static uint16_t srcover_modeproc16_0(SkPMColor src, uint16_t dst) { |
| 1063 | SkASSERT(require_0(src)); |
| 1064 | return dst; |
| 1065 | } |
| 1066 | |
| 1067 | static uint16_t srcover_modeproc16_255(SkPMColor src, uint16_t dst) { |
| 1068 | SkASSERT(require_255(src)); |
| 1069 | return SkPixel32ToPixel16(src); |
| 1070 | } |
| 1071 | |
| 1072 | static uint16_t dstover_modeproc16_0(SkPMColor src, uint16_t dst) { |
| 1073 | SkASSERT(require_0(src)); |
| 1074 | return dst; |
| 1075 | } |
| 1076 | |
| 1077 | static uint16_t dstover_modeproc16_255(SkPMColor src, uint16_t dst) { |
| 1078 | SkASSERT(require_255(src)); |
| 1079 | return dst; |
| 1080 | } |
| 1081 | |
| 1082 | static uint16_t srcin_modeproc16_255(SkPMColor src, uint16_t dst) { |
| 1083 | SkASSERT(require_255(src)); |
| 1084 | return SkPixel32ToPixel16(src); |
| 1085 | } |
| 1086 | |
| 1087 | static uint16_t dstin_modeproc16_255(SkPMColor src, uint16_t dst) { |
| 1088 | SkASSERT(require_255(src)); |
| 1089 | return dst; |
| 1090 | } |
| 1091 | |
| 1092 | static uint16_t dstout_modeproc16_0(SkPMColor src, uint16_t dst) { |
| 1093 | SkASSERT(require_0(src)); |
| 1094 | return dst; |
| 1095 | } |
| 1096 | |
| 1097 | static uint16_t srcatop_modeproc16(SkPMColor src, uint16_t dst) { |
| 1098 | unsigned isa = 255 - SkGetPackedA32(src); |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 1099 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1100 | return SkPackRGB16( |
| 1101 | SkPacked32ToR16(src) + SkAlphaMulAlpha(SkGetPackedR16(dst), isa), |
| 1102 | SkPacked32ToG16(src) + SkAlphaMulAlpha(SkGetPackedG16(dst), isa), |
| 1103 | SkPacked32ToB16(src) + SkAlphaMulAlpha(SkGetPackedB16(dst), isa)); |
| 1104 | } |
| 1105 | |
| 1106 | static uint16_t srcatop_modeproc16_0(SkPMColor src, uint16_t dst) { |
| 1107 | SkASSERT(require_0(src)); |
| 1108 | return dst; |
| 1109 | } |
| 1110 | |
| 1111 | static uint16_t srcatop_modeproc16_255(SkPMColor src, uint16_t dst) { |
| 1112 | SkASSERT(require_255(src)); |
| 1113 | return SkPixel32ToPixel16(src); |
| 1114 | } |
| 1115 | |
| 1116 | static uint16_t dstatop_modeproc16_255(SkPMColor src, uint16_t dst) { |
| 1117 | SkASSERT(require_255(src)); |
| 1118 | return dst; |
| 1119 | } |
| 1120 | |
| 1121 | /********* |
| 1122 | darken and lighten boil down to this. |
| 1123 | |
| 1124 | darken = (1 - Sa) * Dc + min(Sc, Dc) |
| 1125 | lighten = (1 - Sa) * Dc + max(Sc, Dc) |
| 1126 | |
| 1127 | if (Sa == 0) these become |
| 1128 | darken = Dc + min(0, Dc) = 0 |
| 1129 | lighten = Dc + max(0, Dc) = Dc |
| 1130 | |
| 1131 | if (Sa == 1) these become |
| 1132 | darken = min(Sc, Dc) |
| 1133 | lighten = max(Sc, Dc) |
| 1134 | */ |
| 1135 | |
| 1136 | static uint16_t darken_modeproc16_0(SkPMColor src, uint16_t dst) { |
| 1137 | SkASSERT(require_0(src)); |
| 1138 | return 0; |
| 1139 | } |
| 1140 | |
| 1141 | static uint16_t darken_modeproc16_255(SkPMColor src, uint16_t dst) { |
| 1142 | SkASSERT(require_255(src)); |
| 1143 | unsigned r = SkFastMin32(SkPacked32ToR16(src), SkGetPackedR16(dst)); |
| 1144 | unsigned g = SkFastMin32(SkPacked32ToG16(src), SkGetPackedG16(dst)); |
| 1145 | unsigned b = SkFastMin32(SkPacked32ToB16(src), SkGetPackedB16(dst)); |
| 1146 | return SkPackRGB16(r, g, b); |
| 1147 | } |
| 1148 | |
| 1149 | static uint16_t lighten_modeproc16_0(SkPMColor src, uint16_t dst) { |
| 1150 | SkASSERT(require_0(src)); |
| 1151 | return dst; |
| 1152 | } |
| 1153 | |
| 1154 | static uint16_t lighten_modeproc16_255(SkPMColor src, uint16_t dst) { |
| 1155 | SkASSERT(require_255(src)); |
| 1156 | unsigned r = SkMax32(SkPacked32ToR16(src), SkGetPackedR16(dst)); |
| 1157 | unsigned g = SkMax32(SkPacked32ToG16(src), SkGetPackedG16(dst)); |
| 1158 | unsigned b = SkMax32(SkPacked32ToB16(src), SkGetPackedB16(dst)); |
| 1159 | return SkPackRGB16(r, g, b); |
| 1160 | } |
| 1161 | |
| 1162 | struct Proc16Rec { |
| 1163 | SkXfermodeProc16 fProc16_0; |
| 1164 | SkXfermodeProc16 fProc16_255; |
| 1165 | SkXfermodeProc16 fProc16_General; |
| 1166 | }; |
| 1167 | |
reed@android.com | a0f5d15 | 2009-06-22 17:38:10 +0000 | [diff] [blame] | 1168 | static const Proc16Rec gModeProcs16[] = { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1169 | { NULL, NULL, NULL }, // CLEAR |
| 1170 | { NULL, src_modeproc16_255, NULL }, |
| 1171 | { dst_modeproc16, dst_modeproc16, dst_modeproc16 }, |
| 1172 | { srcover_modeproc16_0, srcover_modeproc16_255, NULL }, |
| 1173 | { dstover_modeproc16_0, dstover_modeproc16_255, NULL }, |
| 1174 | { NULL, srcin_modeproc16_255, NULL }, |
| 1175 | { NULL, dstin_modeproc16_255, NULL }, |
| 1176 | { NULL, NULL, NULL },// SRC_OUT |
| 1177 | { dstout_modeproc16_0, NULL, NULL }, |
| 1178 | { srcatop_modeproc16_0, srcatop_modeproc16_255, srcatop_modeproc16 }, |
| 1179 | { NULL, dstatop_modeproc16_255, NULL }, |
| 1180 | { NULL, NULL, NULL }, // XOR |
reed@android.com | a0f5d15 | 2009-06-22 17:38:10 +0000 | [diff] [blame] | 1181 | |
| 1182 | { NULL, NULL, NULL }, // plus |
| 1183 | { NULL, NULL, NULL }, // multiply |
| 1184 | { NULL, NULL, NULL }, // screen |
| 1185 | { NULL, NULL, NULL }, // overlay |
| 1186 | { darken_modeproc16_0, darken_modeproc16_255, NULL }, // darken |
| 1187 | { lighten_modeproc16_0, lighten_modeproc16_255, NULL }, // lighten |
| 1188 | { NULL, NULL, NULL }, // colordodge |
| 1189 | { NULL, NULL, NULL }, // colorburn |
| 1190 | { NULL, NULL, NULL }, // hardlight |
| 1191 | { NULL, NULL, NULL }, // softlight |
| 1192 | { NULL, NULL, NULL }, // difference |
| 1193 | { NULL, NULL, NULL }, // exclusion |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1194 | }; |
| 1195 | |
reed@android.com | a0f5d15 | 2009-06-22 17:38:10 +0000 | [diff] [blame] | 1196 | SkXfermodeProc16 SkXfermode::GetProc16(Mode mode, SkColor srcColor) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1197 | SkXfermodeProc16 proc16 = NULL; |
reed@android.com | a0f5d15 | 2009-06-22 17:38:10 +0000 | [diff] [blame] | 1198 | if ((unsigned)mode < kModeCount) { |
| 1199 | const Proc16Rec& rec = gModeProcs16[mode]; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1200 | unsigned a = SkColorGetA(srcColor); |
| 1201 | |
| 1202 | if (0 == a) { |
| 1203 | proc16 = rec.fProc16_0; |
| 1204 | } else if (255 == a) { |
| 1205 | proc16 = rec.fProc16_255; |
| 1206 | } else { |
| 1207 | proc16 = rec.fProc16_General; |
| 1208 | } |
| 1209 | } |
| 1210 | return proc16; |
| 1211 | } |
| 1212 | |
tomhudson@google.com | 1447c6f | 2011-04-27 14:09:52 +0000 | [diff] [blame] | 1213 | static SkFlattenable::Registrar |
| 1214 | gSkProcCoeffXfermodeReg("SkProcCoeffXfermode", |
| 1215 | SkProcCoeffXfermode::CreateProc); |
| 1216 | |
| 1217 | static SkFlattenable::Registrar |
| 1218 | gSkClearXfermodeReg("SkClearXfermode", SkClearXfermode::CreateProc); |
| 1219 | |
| 1220 | static SkFlattenable::Registrar |
| 1221 | gSkSrcXfermodeReg("SkSrcXfermode", SkSrcXfermode::CreateProc); |
| 1222 | |
| 1223 | static SkFlattenable::Registrar |
| 1224 | gSkDstInXfermodeReg("SkDstInXfermode", SkDstInXfermode::CreateProc); |
| 1225 | |
| 1226 | static SkFlattenable::Registrar |
| 1227 | gSkDstOutXfermodeReg("SkDstOutXfermode", SkDstOutXfermode::CreateProc); |