1 /* 2 * Copyright 2006 The Android Open Source Project 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #include "SkCoreBlitters.h" 9 #include "SkColorData.h" 10 #include "SkShader.h" 11 #include "SkUtils.h" 12 #include "SkXfermodePriv.h" 13 #include "SkBlitMask.h" 14 15 /////////////////////////////////////////////////////////////////////////////// 16 17 static void SkARGB32_Blit32(const SkPixmap& device, const SkMask& mask, 18 const SkIRect& clip, SkPMColor srcColor) { 19 U8CPU alpha = SkGetPackedA32(srcColor); 20 unsigned flags = SkBlitRow::kSrcPixelAlpha_Flag32; 21 if (alpha != 255) { 22 flags |= SkBlitRow::kGlobalAlpha_Flag32; 23 } 24 SkBlitRow::Proc32 proc = SkBlitRow::Factory32(flags); 25 26 int x = clip.fLeft; 27 int y = clip.fTop; 28 int width = clip.width(); 29 int height = clip.height(); 30 31 SkPMColor* dstRow = device.writable_addr32(x, y); 32 const SkPMColor* srcRow = reinterpret_cast<const SkPMColor*>(mask.getAddr8(x, y)); 33 34 do { 35 proc(dstRow, srcRow, width, alpha); 36 dstRow = (SkPMColor*)((char*)dstRow + device.rowBytes()); 37 srcRow = (const SkPMColor*)((const char*)srcRow + mask.fRowBytes); 38 } while (--height != 0); 39 } 40 41 ////////////////////////////////////////////////////////////////////////////////////// 42 43 SkARGB32_Blitter::SkARGB32_Blitter(const SkPixmap& device, const SkPaint& paint) 44 : INHERITED(device) { 45 SkColor color = paint.getColor(); 46 fColor = color; 47 48 fSrcA = SkColorGetA(color); 49 unsigned scale = SkAlpha255To256(fSrcA); 50 fSrcR = SkAlphaMul(SkColorGetR(color), scale); 51 fSrcG = SkAlphaMul(SkColorGetG(color), scale); 52 fSrcB = SkAlphaMul(SkColorGetB(color), scale); 53 54 fPMColor = SkPackARGB32(fSrcA, fSrcR, fSrcG, fSrcB); 55 } 56 57 const SkPixmap* SkARGB32_Blitter::justAnOpaqueColor(uint32_t* value) { 58 if (255 == fSrcA) { 59 *value = fPMColor; 60 return &fDevice; 61 } 62 return nullptr; 63 } 64 65 #if defined _WIN32 // disable warning : local variable used without having been initialized 66 #pragma warning ( push ) 67 #pragma warning ( disable : 4701 ) 68 #endif 69 70 void SkARGB32_Blitter::blitH(int x, int y, int width) { 71 SkASSERT(x >= 0 && y >= 0 && x + width <= fDevice.width()); 72 73 uint32_t* device = fDevice.writable_addr32(x, y); 74 SkBlitRow::Color32(device, device, width, fPMColor); 75 } 76 77 void SkARGB32_Blitter::blitAntiH(int x, int y, const SkAlpha antialias[], 78 const int16_t runs[]) { 79 if (fSrcA == 0) { 80 return; 81 } 82 83 uint32_t color = fPMColor; 84 uint32_t* device = fDevice.writable_addr32(x, y); 85 unsigned opaqueMask = fSrcA; // if fSrcA is 0xFF, then we will catch the fast opaque case 86 87 for (;;) { 88 int count = runs[0]; 89 SkASSERT(count >= 0); 90 if (count <= 0) { 91 return; 92 } 93 unsigned aa = antialias[0]; 94 if (aa) { 95 if ((opaqueMask & aa) == 255) { 96 sk_memset32(device, color, count); 97 } else { 98 uint32_t sc = SkAlphaMulQ(color, SkAlpha255To256(aa)); 99 SkBlitRow::Color32(device, device, count, sc); 100 } 101 } 102 runs += count; 103 antialias += count; 104 device += count; 105 } 106 } 107 108 void SkARGB32_Blitter::blitAntiH2(int x, int y, U8CPU a0, U8CPU a1) { 109 uint32_t* device = fDevice.writable_addr32(x, y); 110 SkDEBUGCODE((void)fDevice.writable_addr32(x + 1, y);) 111 112 device[0] = SkBlendARGB32(fPMColor, device[0], a0); 113 device[1] = SkBlendARGB32(fPMColor, device[1], a1); 114 } 115 116 void SkARGB32_Blitter::blitAntiV2(int x, int y, U8CPU a0, U8CPU a1) { 117 uint32_t* device = fDevice.writable_addr32(x, y); 118 SkDEBUGCODE((void)fDevice.writable_addr32(x, y + 1);) 119 120 device[0] = SkBlendARGB32(fPMColor, device[0], a0); 121 device = (uint32_t*)((char*)device + fDevice.rowBytes()); 122 device[0] = SkBlendARGB32(fPMColor, device[0], a1); 123 } 124 125 ////////////////////////////////////////////////////////////////////////////////////// 126 127 #define solid_8_pixels(mask, dst, color) \ 128 do { \ 129 if (mask & 0x80) dst[0] = color; \ 130 if (mask & 0x40) dst[1] = color; \ 131 if (mask & 0x20) dst[2] = color; \ 132 if (mask & 0x10) dst[3] = color; \ 133 if (mask & 0x08) dst[4] = color; \ 134 if (mask & 0x04) dst[5] = color; \ 135 if (mask & 0x02) dst[6] = color; \ 136 if (mask & 0x01) dst[7] = color; \ 137 } while (0) 138 139 #define SK_BLITBWMASK_NAME SkARGB32_BlitBW 140 #define SK_BLITBWMASK_ARGS , SkPMColor color 141 #define SK_BLITBWMASK_BLIT8(mask, dst) solid_8_pixels(mask, dst, color) 142 #define SK_BLITBWMASK_GETADDR writable_addr32 143 #define SK_BLITBWMASK_DEVTYPE uint32_t 144 #include "SkBlitBWMaskTemplate.h" 145 146 #define blend_8_pixels(mask, dst, sc, dst_scale) \ 147 do { \ 148 if (mask & 0x80) { dst[0] = sc + SkAlphaMulQ(dst[0], dst_scale); } \ 149 if (mask & 0x40) { dst[1] = sc + SkAlphaMulQ(dst[1], dst_scale); } \ 150 if (mask & 0x20) { dst[2] = sc + SkAlphaMulQ(dst[2], dst_scale); } \ 151 if (mask & 0x10) { dst[3] = sc + SkAlphaMulQ(dst[3], dst_scale); } \ 152 if (mask & 0x08) { dst[4] = sc + SkAlphaMulQ(dst[4], dst_scale); } \ 153 if (mask & 0x04) { dst[5] = sc + SkAlphaMulQ(dst[5], dst_scale); } \ 154 if (mask & 0x02) { dst[6] = sc + SkAlphaMulQ(dst[6], dst_scale); } \ 155 if (mask & 0x01) { dst[7] = sc + SkAlphaMulQ(dst[7], dst_scale); } \ 156 } while (0) 157 158 #define SK_BLITBWMASK_NAME SkARGB32_BlendBW 159 #define SK_BLITBWMASK_ARGS , uint32_t sc, unsigned dst_scale 160 #define SK_BLITBWMASK_BLIT8(mask, dst) blend_8_pixels(mask, dst, sc, dst_scale) 161 #define SK_BLITBWMASK_GETADDR writable_addr32 162 #define SK_BLITBWMASK_DEVTYPE uint32_t 163 #include "SkBlitBWMaskTemplate.h" 164 165 void SkARGB32_Blitter::blitMask(const SkMask& mask, const SkIRect& clip) { 166 SkASSERT(mask.fBounds.contains(clip)); 167 SkASSERT(fSrcA != 0xFF); 168 169 if (fSrcA == 0) { 170 return; 171 } 172 173 if (SkBlitMask::BlitColor(fDevice, mask, clip, fColor)) { 174 return; 175 } 176 177 switch (mask.fFormat) { 178 case SkMask::kBW_Format: 179 SkARGB32_BlendBW(fDevice, mask, clip, fPMColor, SkAlpha255To256(255 - fSrcA)); 180 break; 181 case SkMask::kARGB32_Format: 182 SkARGB32_Blit32(fDevice, mask, clip, fPMColor); 183 break; 184 default: 185 SK_ABORT("Mask format not handled."); 186 } 187 } 188 189 void SkARGB32_Opaque_Blitter::blitMask(const SkMask& mask, 190 const SkIRect& clip) { 191 SkASSERT(mask.fBounds.contains(clip)); 192 193 if (SkBlitMask::BlitColor(fDevice, mask, clip, fColor)) { 194 return; 195 } 196 197 switch (mask.fFormat) { 198 case SkMask::kBW_Format: 199 SkARGB32_BlitBW(fDevice, mask, clip, fPMColor); 200 break; 201 case SkMask::kARGB32_Format: 202 SkARGB32_Blit32(fDevice, mask, clip, fPMColor); 203 break; 204 default: 205 SK_ABORT("Mask format not handled."); 206 } 207 } 208 209 void SkARGB32_Opaque_Blitter::blitAntiH2(int x, int y, U8CPU a0, U8CPU a1) { 210 uint32_t* device = fDevice.writable_addr32(x, y); 211 SkDEBUGCODE((void)fDevice.writable_addr32(x + 1, y);) 212 213 device[0] = SkFastFourByteInterp(fPMColor, device[0], a0); 214 device[1] = SkFastFourByteInterp(fPMColor, device[1], a1); 215 } 216 217 void SkARGB32_Opaque_Blitter::blitAntiV2(int x, int y, U8CPU a0, U8CPU a1) { 218 uint32_t* device = fDevice.writable_addr32(x, y); 219 SkDEBUGCODE((void)fDevice.writable_addr32(x, y + 1);) 220 221 device[0] = SkFastFourByteInterp(fPMColor, device[0], a0); 222 device = (uint32_t*)((char*)device + fDevice.rowBytes()); 223 device[0] = SkFastFourByteInterp(fPMColor, device[0], a1); 224 } 225 226 /////////////////////////////////////////////////////////////////////////////// 227 228 void SkARGB32_Blitter::blitV(int x, int y, int height, SkAlpha alpha) { 229 if (alpha == 0 || fSrcA == 0) { 230 return; 231 } 232 233 uint32_t* device = fDevice.writable_addr32(x, y); 234 uint32_t color = fPMColor; 235 236 if (alpha != 255) { 237 color = SkAlphaMulQ(color, SkAlpha255To256(alpha)); 238 } 239 240 unsigned dst_scale = SkAlpha255To256(255 - SkGetPackedA32(color)); 241 size_t rowBytes = fDevice.rowBytes(); 242 while (--height >= 0) { 243 device[0] = color + SkAlphaMulQ(device[0], dst_scale); 244 device = (uint32_t*)((char*)device + rowBytes); 245 } 246 } 247 248 void SkARGB32_Blitter::blitRect(int x, int y, int width, int height) { 249 SkASSERT(x >= 0 && y >= 0 && x + width <= fDevice.width() && y + height <= fDevice.height()); 250 251 if (fSrcA == 0) { 252 return; 253 } 254 255 uint32_t* device = fDevice.writable_addr32(x, y); 256 uint32_t color = fPMColor; 257 size_t rowBytes = fDevice.rowBytes(); 258 259 while (--height >= 0) { 260 SkBlitRow::Color32(device, device, width, color); 261 device = (uint32_t*)((char*)device + rowBytes); 262 } 263 } 264 265 #if defined _WIN32 266 #pragma warning ( pop ) 267 #endif 268 269 /////////////////////////////////////////////////////////////////////// 270 271 void SkARGB32_Black_Blitter::blitAntiH(int x, int y, const SkAlpha antialias[], 272 const int16_t runs[]) { 273 uint32_t* device = fDevice.writable_addr32(x, y); 274 SkPMColor black = (SkPMColor)(SK_A32_MASK << SK_A32_SHIFT); 275 276 for (;;) { 277 int count = runs[0]; 278 SkASSERT(count >= 0); 279 if (count <= 0) { 280 return; 281 } 282 unsigned aa = antialias[0]; 283 if (aa) { 284 if (aa == 255) { 285 sk_memset32(device, black, count); 286 } else { 287 SkPMColor src = aa << SK_A32_SHIFT; 288 unsigned dst_scale = 256 - aa; 289 int n = count; 290 do { 291 --n; 292 device[n] = src + SkAlphaMulQ(device[n], dst_scale); 293 } while (n > 0); 294 } 295 } 296 runs += count; 297 antialias += count; 298 device += count; 299 } 300 } 301 302 void SkARGB32_Black_Blitter::blitAntiH2(int x, int y, U8CPU a0, U8CPU a1) { 303 uint32_t* device = fDevice.writable_addr32(x, y); 304 SkDEBUGCODE((void)fDevice.writable_addr32(x + 1, y);) 305 306 device[0] = (a0 << SK_A32_SHIFT) + SkAlphaMulQ(device[0], 256 - a0); 307 device[1] = (a1 << SK_A32_SHIFT) + SkAlphaMulQ(device[1], 256 - a1); 308 } 309 310 void SkARGB32_Black_Blitter::blitAntiV2(int x, int y, U8CPU a0, U8CPU a1) { 311 uint32_t* device = fDevice.writable_addr32(x, y); 312 SkDEBUGCODE((void)fDevice.writable_addr32(x, y + 1);) 313 314 device[0] = (a0 << SK_A32_SHIFT) + SkAlphaMulQ(device[0], 256 - a0); 315 device = (uint32_t*)((char*)device + fDevice.rowBytes()); 316 device[0] = (a1 << SK_A32_SHIFT) + SkAlphaMulQ(device[0], 256 - a1); 317 } 318 319 /////////////////////////////////////////////////////////////////////////////// 320 321 // Special version of SkBlitRow::Factory32 that knows we're in kSrc_Mode, 322 // instead of kSrcOver_Mode 323 static void blend_srcmode(SkPMColor* SK_RESTRICT device, 324 const SkPMColor* SK_RESTRICT span, 325 int count, U8CPU aa) { 326 int aa256 = SkAlpha255To256(aa); 327 for (int i = 0; i < count; ++i) { 328 device[i] = SkFourByteInterp256(span[i], device[i], aa256); 329 } 330 } 331 332 SkARGB32_Shader_Blitter::SkARGB32_Shader_Blitter(const SkPixmap& device, 333 const SkPaint& paint, SkShaderBase::Context* shaderContext) 334 : INHERITED(device, paint, shaderContext) 335 { 336 fBuffer = (SkPMColor*)sk_malloc_throw(device.width() * (sizeof(SkPMColor))); 337 338 fXfermode = SkXfermode::Peek(paint.getBlendMode()); 339 340 int flags = 0; 341 if (!(shaderContext->getFlags() & SkShaderBase::kOpaqueAlpha_Flag)) { 342 flags |= SkBlitRow::kSrcPixelAlpha_Flag32; 343 } 344 // we call this on the output from the shader 345 fProc32 = SkBlitRow::Factory32(flags); 346 // we call this on the output from the shader + alpha from the aa buffer 347 fProc32Blend = SkBlitRow::Factory32(flags | SkBlitRow::kGlobalAlpha_Flag32); 348 349 fShadeDirectlyIntoDevice = false; 350 if (fXfermode == nullptr) { 351 if (shaderContext->getFlags() & SkShaderBase::kOpaqueAlpha_Flag) { 352 fShadeDirectlyIntoDevice = true; 353 } 354 } else { 355 if (SkBlendMode::kSrc == paint.getBlendMode()) { 356 fShadeDirectlyIntoDevice = true; 357 fProc32Blend = blend_srcmode; 358 } 359 } 360 361 fConstInY = SkToBool(shaderContext->getFlags() & SkShaderBase::kConstInY32_Flag); 362 } 363 364 SkARGB32_Shader_Blitter::~SkARGB32_Shader_Blitter() { 365 sk_free(fBuffer); 366 } 367 368 void SkARGB32_Shader_Blitter::blitH(int x, int y, int width) { 369 SkASSERT(x >= 0 && y >= 0 && x + width <= fDevice.width()); 370 371 uint32_t* device = fDevice.writable_addr32(x, y); 372 373 if (fShadeDirectlyIntoDevice) { 374 fShaderContext->shadeSpan(x, y, device, width); 375 } else { 376 SkPMColor* span = fBuffer; 377 fShaderContext->shadeSpan(x, y, span, width); 378 if (fXfermode) { 379 fXfermode->xfer32(device, span, width, nullptr); 380 } else { 381 fProc32(device, span, width, 255); 382 } 383 } 384 } 385 386 void SkARGB32_Shader_Blitter::blitRect(int x, int y, int width, int height) { 387 SkASSERT(x >= 0 && y >= 0 && 388 x + width <= fDevice.width() && y + height <= fDevice.height()); 389 390 uint32_t* device = fDevice.writable_addr32(x, y); 391 size_t deviceRB = fDevice.rowBytes(); 392 auto* shaderContext = fShaderContext; 393 SkPMColor* span = fBuffer; 394 395 if (fConstInY) { 396 if (fShadeDirectlyIntoDevice) { 397 // shade the first row directly into the device 398 shaderContext->shadeSpan(x, y, device, width); 399 span = device; 400 while (--height > 0) { 401 device = (uint32_t*)((char*)device + deviceRB); 402 memcpy(device, span, width << 2); 403 } 404 } else { 405 shaderContext->shadeSpan(x, y, span, width); 406 SkXfermode* xfer = fXfermode; 407 if (xfer) { 408 do { 409 xfer->xfer32(device, span, width, nullptr); 410 y += 1; 411 device = (uint32_t*)((char*)device + deviceRB); 412 } while (--height > 0); 413 } else { 414 SkBlitRow::Proc32 proc = fProc32; 415 do { 416 proc(device, span, width, 255); 417 y += 1; 418 device = (uint32_t*)((char*)device + deviceRB); 419 } while (--height > 0); 420 } 421 } 422 return; 423 } 424 425 if (fShadeDirectlyIntoDevice) { 426 do { 427 shaderContext->shadeSpan(x, y, device, width); 428 y += 1; 429 device = (uint32_t*)((char*)device + deviceRB); 430 } while (--height > 0); 431 } else { 432 SkXfermode* xfer = fXfermode; 433 if (xfer) { 434 do { 435 shaderContext->shadeSpan(x, y, span, width); 436 xfer->xfer32(device, span, width, nullptr); 437 y += 1; 438 device = (uint32_t*)((char*)device + deviceRB); 439 } while (--height > 0); 440 } else { 441 SkBlitRow::Proc32 proc = fProc32; 442 do { 443 shaderContext->shadeSpan(x, y, span, width); 444 proc(device, span, width, 255); 445 y += 1; 446 device = (uint32_t*)((char*)device + deviceRB); 447 } while (--height > 0); 448 } 449 } 450 } 451 452 void SkARGB32_Shader_Blitter::blitAntiH(int x, int y, const SkAlpha antialias[], 453 const int16_t runs[]) { 454 SkPMColor* span = fBuffer; 455 uint32_t* device = fDevice.writable_addr32(x, y); 456 auto* shaderContext = fShaderContext; 457 458 if (fXfermode && !fShadeDirectlyIntoDevice) { 459 for (;;) { 460 SkXfermode* xfer = fXfermode; 461 462 int count = *runs; 463 if (count <= 0) 464 break; 465 int aa = *antialias; 466 if (aa) { 467 shaderContext->shadeSpan(x, y, span, count); 468 if (aa == 255) { 469 xfer->xfer32(device, span, count, nullptr); 470 } else { 471 // count is almost always 1 472 for (int i = count - 1; i >= 0; --i) { 473 xfer->xfer32(&device[i], &span[i], 1, antialias); 474 } 475 } 476 } 477 device += count; 478 runs += count; 479 antialias += count; 480 x += count; 481 } 482 } else if (fShadeDirectlyIntoDevice || 483 (shaderContext->getFlags() & SkShaderBase::kOpaqueAlpha_Flag)) { 484 for (;;) { 485 int count = *runs; 486 if (count <= 0) { 487 break; 488 } 489 int aa = *antialias; 490 if (aa) { 491 if (aa == 255) { 492 // cool, have the shader draw right into the device 493 shaderContext->shadeSpan(x, y, device, count); 494 } else { 495 shaderContext->shadeSpan(x, y, span, count); 496 fProc32Blend(device, span, count, aa); 497 } 498 } 499 device += count; 500 runs += count; 501 antialias += count; 502 x += count; 503 } 504 } else { 505 for (;;) { 506 int count = *runs; 507 if (count <= 0) { 508 break; 509 } 510 int aa = *antialias; 511 if (aa) { 512 shaderContext->shadeSpan(x, y, span, count); 513 if (aa == 255) { 514 fProc32(device, span, count, 255); 515 } else { 516 fProc32Blend(device, span, count, aa); 517 } 518 } 519 device += count; 520 runs += count; 521 antialias += count; 522 x += count; 523 } 524 } 525 } 526 527 void SkARGB32_Shader_Blitter::blitMask(const SkMask& mask, const SkIRect& clip) { 528 // we only handle kA8 with an xfermode 529 if (fXfermode && (SkMask::kA8_Format != mask.fFormat)) { 530 this->INHERITED::blitMask(mask, clip); 531 return; 532 } 533 534 SkASSERT(mask.fBounds.contains(clip)); 535 536 auto* shaderContext = fShaderContext; 537 SkBlitMask::RowProc proc = nullptr; 538 if (!fXfermode) { 539 unsigned flags = 0; 540 if (shaderContext->getFlags() & SkShaderBase::kOpaqueAlpha_Flag) { 541 flags |= SkBlitMask::kSrcIsOpaque_RowFlag; 542 } 543 proc = SkBlitMask::RowFactory(kN32_SkColorType, mask.fFormat, 544 (SkBlitMask::RowFlags)flags); 545 if (nullptr == proc) { 546 this->INHERITED::blitMask(mask, clip); 547 return; 548 } 549 } 550 551 const int x = clip.fLeft; 552 const int width = clip.width(); 553 int y = clip.fTop; 554 int height = clip.height(); 555 556 char* dstRow = (char*)fDevice.writable_addr32(x, y); 557 const size_t dstRB = fDevice.rowBytes(); 558 const uint8_t* maskRow = (const uint8_t*)mask.getAddr(x, y); 559 const size_t maskRB = mask.fRowBytes; 560 561 SkPMColor* span = fBuffer; 562 563 if (fXfermode) { 564 SkASSERT(SkMask::kA8_Format == mask.fFormat); 565 SkXfermode* xfer = fXfermode; 566 do { 567 shaderContext->shadeSpan(x, y, span, width); 568 xfer->xfer32(reinterpret_cast<SkPMColor*>(dstRow), span, width, maskRow); 569 dstRow += dstRB; 570 maskRow += maskRB; 571 y += 1; 572 } while (--height > 0); 573 } else { 574 do { 575 shaderContext->shadeSpan(x, y, span, width); 576 proc(reinterpret_cast<SkPMColor*>(dstRow), maskRow, span, width); 577 dstRow += dstRB; 578 maskRow += maskRB; 579 y += 1; 580 } while (--height > 0); 581 } 582 } 583 584 void SkARGB32_Shader_Blitter::blitV(int x, int y, int height, SkAlpha alpha) { 585 SkASSERT(x >= 0 && y >= 0 && y + height <= fDevice.height()); 586 587 uint32_t* device = fDevice.writable_addr32(x, y); 588 size_t deviceRB = fDevice.rowBytes(); 589 auto* shaderContext = fShaderContext; 590 591 if (fConstInY) { 592 SkPMColor c; 593 shaderContext->shadeSpan(x, y, &c, 1); 594 595 if (fShadeDirectlyIntoDevice) { 596 if (255 == alpha) { 597 do { 598 *device = c; 599 device = (uint32_t*)((char*)device + deviceRB); 600 } while (--height > 0); 601 } else { 602 do { 603 *device = SkFourByteInterp(c, *device, alpha); 604 device = (uint32_t*)((char*)device + deviceRB); 605 } while (--height > 0); 606 } 607 } else { 608 SkXfermode* xfer = fXfermode; 609 if (xfer) { 610 do { 611 xfer->xfer32(device, &c, 1, &alpha); 612 device = (uint32_t*)((char*)device + deviceRB); 613 } while (--height > 0); 614 } else { 615 SkBlitRow::Proc32 proc = (255 == alpha) ? fProc32 : fProc32Blend; 616 do { 617 proc(device, &c, 1, alpha); 618 device = (uint32_t*)((char*)device + deviceRB); 619 } while (--height > 0); 620 } 621 } 622 return; 623 } 624 625 if (fShadeDirectlyIntoDevice) { 626 if (255 == alpha) { 627 do { 628 shaderContext->shadeSpan(x, y, device, 1); 629 y += 1; 630 device = (uint32_t*)((char*)device + deviceRB); 631 } while (--height > 0); 632 } else { 633 do { 634 SkPMColor c; 635 shaderContext->shadeSpan(x, y, &c, 1); 636 *device = SkFourByteInterp(c, *device, alpha); 637 y += 1; 638 device = (uint32_t*)((char*)device + deviceRB); 639 } while (--height > 0); 640 } 641 } else { 642 SkPMColor* span = fBuffer; 643 SkXfermode* xfer = fXfermode; 644 if (xfer) { 645 do { 646 shaderContext->shadeSpan(x, y, span, 1); 647 xfer->xfer32(device, span, 1, &alpha); 648 y += 1; 649 device = (uint32_t*)((char*)device + deviceRB); 650 } while (--height > 0); 651 } else { 652 SkBlitRow::Proc32 proc = (255 == alpha) ? fProc32 : fProc32Blend; 653 do { 654 shaderContext->shadeSpan(x, y, span, 1); 655 proc(device, span, 1, alpha); 656 y += 1; 657 device = (uint32_t*)((char*)device + deviceRB); 658 } while (--height > 0); 659 } 660 } 661 } 662
