SkBlitter_RGB16.cpp revision bc2f1dc85e458af7bdb87873e60207f9f7299e4a
1 2/* 3 * Copyright 2006 The Android Open Source Project 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 9 10#include "SkBlitRow.h" 11#include "SkCoreBlitters.h" 12#include "SkColorPriv.h" 13#include "SkDither.h" 14#include "SkShader.h" 15#include "SkUtils.h" 16#include "SkUtilsArm.h" 17#include "SkXfermode.h" 18 19#if SK_ARM_NEON_IS_ALWAYS && defined(SK_CPU_LENDIAN) 20 #include <arm_neon.h> 21#else 22 // if we don't have neon, then our black blitter is worth the extra code 23 #define USE_BLACK_BLITTER 24#endif 25 26void sk_dither_memset16(uint16_t dst[], uint16_t value, uint16_t other, 27 int count) { 28 if (count > 0) { 29 // see if we need to write one short before we can cast to an 4byte ptr 30 // (we do this subtract rather than (unsigned)dst so we don't get warnings 31 // on 64bit machines) 32 if (((char*)dst - (char*)0) & 2) { 33 *dst++ = value; 34 count -= 1; 35 SkTSwap(value, other); 36 } 37 38 // fast way to set [value,other] pairs 39#ifdef SK_CPU_BENDIAN 40 sk_memset32((uint32_t*)dst, (value << 16) | other, count >> 1); 41#else 42 sk_memset32((uint32_t*)dst, (other << 16) | value, count >> 1); 43#endif 44 45 if (count & 1) { 46 dst[count - 1] = value; 47 } 48 } 49} 50 51/////////////////////////////////////////////////////////////////////////////// 52 53class SkRGB16_Blitter : public SkRasterBlitter { 54public: 55 SkRGB16_Blitter(const SkBitmap& device, const SkPaint& paint); 56 virtual void blitH(int x, int y, int width); 57 virtual void blitAntiH(int x, int y, const SkAlpha* antialias, 58 const int16_t* runs); 59 virtual void blitV(int x, int y, int height, SkAlpha alpha); 60 virtual void blitRect(int x, int y, int width, int height); 61 virtual void blitMask(const SkMask&, 62 const SkIRect&); 63 virtual const SkBitmap* justAnOpaqueColor(uint32_t*); 64 65protected: 66 SkPMColor fSrcColor32; 67 uint32_t fExpandedRaw16; 68 unsigned fScale; 69 uint16_t fColor16; // already scaled by fScale 70 uint16_t fRawColor16; // unscaled 71 uint16_t fRawDither16; // unscaled 72 SkBool8 fDoDither; 73 74 // illegal 75 SkRGB16_Blitter& operator=(const SkRGB16_Blitter&); 76 77 typedef SkRasterBlitter INHERITED; 78}; 79 80class SkRGB16_Opaque_Blitter : public SkRGB16_Blitter { 81public: 82 SkRGB16_Opaque_Blitter(const SkBitmap& device, const SkPaint& paint); 83 virtual void blitH(int x, int y, int width); 84 virtual void blitAntiH(int x, int y, const SkAlpha* antialias, 85 const int16_t* runs); 86 virtual void blitV(int x, int y, int height, SkAlpha alpha); 87 virtual void blitRect(int x, int y, int width, int height); 88 virtual void blitMask(const SkMask&, 89 const SkIRect&); 90 91private: 92 typedef SkRGB16_Blitter INHERITED; 93}; 94 95#ifdef USE_BLACK_BLITTER 96class SkRGB16_Black_Blitter : public SkRGB16_Opaque_Blitter { 97public: 98 SkRGB16_Black_Blitter(const SkBitmap& device, const SkPaint& paint); 99 virtual void blitMask(const SkMask&, const SkIRect&); 100 virtual void blitAntiH(int x, int y, const SkAlpha* antialias, 101 const int16_t* runs); 102 103private: 104 typedef SkRGB16_Opaque_Blitter INHERITED; 105}; 106#endif 107 108class SkRGB16_Shader_Blitter : public SkShaderBlitter { 109public: 110 SkRGB16_Shader_Blitter(const SkBitmap& device, const SkPaint& paint, 111 SkShader::Context* shaderContext); 112 virtual ~SkRGB16_Shader_Blitter(); 113 virtual void blitH(int x, int y, int width); 114 virtual void blitAntiH(int x, int y, const SkAlpha* antialias, 115 const int16_t* runs); 116 virtual void blitRect(int x, int y, int width, int height); 117 118protected: 119 SkPMColor* fBuffer; 120 SkBlitRow::Proc fOpaqueProc; 121 SkBlitRow::Proc fAlphaProc; 122 123private: 124 // illegal 125 SkRGB16_Shader_Blitter& operator=(const SkRGB16_Shader_Blitter&); 126 127 typedef SkShaderBlitter INHERITED; 128}; 129 130// used only if the shader can perform shadSpan16 131class SkRGB16_Shader16_Blitter : public SkRGB16_Shader_Blitter { 132public: 133 SkRGB16_Shader16_Blitter(const SkBitmap& device, const SkPaint& paint, 134 SkShader::Context* shaderContext); 135 virtual void blitH(int x, int y, int width); 136 virtual void blitAntiH(int x, int y, const SkAlpha* antialias, 137 const int16_t* runs); 138 virtual void blitRect(int x, int y, int width, int height); 139 140private: 141 typedef SkRGB16_Shader_Blitter INHERITED; 142}; 143 144class SkRGB16_Shader_Xfermode_Blitter : public SkShaderBlitter { 145public: 146 SkRGB16_Shader_Xfermode_Blitter(const SkBitmap& device, const SkPaint& paint, 147 SkShader::Context* shaderContext); 148 virtual ~SkRGB16_Shader_Xfermode_Blitter(); 149 virtual void blitH(int x, int y, int width); 150 virtual void blitAntiH(int x, int y, const SkAlpha* antialias, 151 const int16_t* runs); 152 153private: 154 SkXfermode* fXfermode; 155 SkPMColor* fBuffer; 156 uint8_t* fAAExpand; 157 158 // illegal 159 SkRGB16_Shader_Xfermode_Blitter& operator=(const SkRGB16_Shader_Xfermode_Blitter&); 160 161 typedef SkShaderBlitter INHERITED; 162}; 163 164/////////////////////////////////////////////////////////////////////////////// 165#ifdef USE_BLACK_BLITTER 166SkRGB16_Black_Blitter::SkRGB16_Black_Blitter(const SkBitmap& device, const SkPaint& paint) 167 : INHERITED(device, paint) { 168 SkASSERT(paint.getShader() == NULL); 169 SkASSERT(paint.getColorFilter() == NULL); 170 SkASSERT(paint.getXfermode() == NULL); 171 SkASSERT(paint.getColor() == SK_ColorBLACK); 172} 173 174#if 1 175#define black_8_pixels(mask, dst) \ 176 do { \ 177 if (mask & 0x80) dst[0] = 0; \ 178 if (mask & 0x40) dst[1] = 0; \ 179 if (mask & 0x20) dst[2] = 0; \ 180 if (mask & 0x10) dst[3] = 0; \ 181 if (mask & 0x08) dst[4] = 0; \ 182 if (mask & 0x04) dst[5] = 0; \ 183 if (mask & 0x02) dst[6] = 0; \ 184 if (mask & 0x01) dst[7] = 0; \ 185 } while (0) 186#else 187static inline black_8_pixels(U8CPU mask, uint16_t dst[]) 188{ 189 if (mask & 0x80) dst[0] = 0; 190 if (mask & 0x40) dst[1] = 0; 191 if (mask & 0x20) dst[2] = 0; 192 if (mask & 0x10) dst[3] = 0; 193 if (mask & 0x08) dst[4] = 0; 194 if (mask & 0x04) dst[5] = 0; 195 if (mask & 0x02) dst[6] = 0; 196 if (mask & 0x01) dst[7] = 0; 197} 198#endif 199 200#define SK_BLITBWMASK_NAME SkRGB16_Black_BlitBW 201#define SK_BLITBWMASK_ARGS 202#define SK_BLITBWMASK_BLIT8(mask, dst) black_8_pixels(mask, dst) 203#define SK_BLITBWMASK_GETADDR getAddr16 204#define SK_BLITBWMASK_DEVTYPE uint16_t 205#include "SkBlitBWMaskTemplate.h" 206 207void SkRGB16_Black_Blitter::blitMask(const SkMask& mask, 208 const SkIRect& clip) { 209 if (mask.fFormat == SkMask::kBW_Format) { 210 SkRGB16_Black_BlitBW(fDevice, mask, clip); 211 } else { 212 uint16_t* SK_RESTRICT device = fDevice.getAddr16(clip.fLeft, clip.fTop); 213 const uint8_t* SK_RESTRICT alpha = mask.getAddr8(clip.fLeft, clip.fTop); 214 unsigned width = clip.width(); 215 unsigned height = clip.height(); 216 size_t deviceRB = fDevice.rowBytes() - (width << 1); 217 unsigned maskRB = mask.fRowBytes - width; 218 219 SkASSERT((int)height > 0); 220 SkASSERT((int)width > 0); 221 SkASSERT((int)deviceRB >= 0); 222 SkASSERT((int)maskRB >= 0); 223 224 do { 225 unsigned w = width; 226 do { 227 unsigned aa = *alpha++; 228 *device = SkAlphaMulRGB16(*device, SkAlpha255To256(255 - aa)); 229 device += 1; 230 } while (--w != 0); 231 device = (uint16_t*)((char*)device + deviceRB); 232 alpha += maskRB; 233 } while (--height != 0); 234 } 235} 236 237void SkRGB16_Black_Blitter::blitAntiH(int x, int y, 238 const SkAlpha* SK_RESTRICT antialias, 239 const int16_t* SK_RESTRICT runs) { 240 uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); 241 242 for (;;) { 243 int count = runs[0]; 244 SkASSERT(count >= 0); 245 if (count <= 0) { 246 return; 247 } 248 runs += count; 249 250 unsigned aa = antialias[0]; 251 antialias += count; 252 if (aa) { 253 if (aa == 255) { 254 memset(device, 0, count << 1); 255 } else { 256 aa = SkAlpha255To256(255 - aa); 257 do { 258 *device = SkAlphaMulRGB16(*device, aa); 259 device += 1; 260 } while (--count != 0); 261 continue; 262 } 263 } 264 device += count; 265 } 266} 267#endif 268 269/////////////////////////////////////////////////////////////////////////////// 270/////////////////////////////////////////////////////////////////////////////// 271 272SkRGB16_Opaque_Blitter::SkRGB16_Opaque_Blitter(const SkBitmap& device, 273 const SkPaint& paint) 274: INHERITED(device, paint) {} 275 276void SkRGB16_Opaque_Blitter::blitH(int x, int y, int width) { 277 SkASSERT(width > 0); 278 SkASSERT(x + width <= fDevice.width()); 279 uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); 280 uint16_t srcColor = fColor16; 281 282 SkASSERT(fRawColor16 == srcColor); 283 if (fDoDither) { 284 uint16_t ditherColor = fRawDither16; 285 if ((x ^ y) & 1) { 286 SkTSwap(ditherColor, srcColor); 287 } 288 sk_dither_memset16(device, srcColor, ditherColor, width); 289 } else { 290 sk_memset16(device, srcColor, width); 291 } 292} 293 294// return 1 or 0 from a bool 295static inline int Bool2Int(int value) { 296 return !!value; 297} 298 299void SkRGB16_Opaque_Blitter::blitAntiH(int x, int y, 300 const SkAlpha* SK_RESTRICT antialias, 301 const int16_t* SK_RESTRICT runs) { 302 uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); 303 uint16_t srcColor = fRawColor16; 304 uint32_t srcExpanded = fExpandedRaw16; 305 int ditherInt = Bool2Int(fDoDither); 306 uint16_t ditherColor = fRawDither16; 307 // if we have no dithering, this will always fail 308 if ((x ^ y) & ditherInt) { 309 SkTSwap(ditherColor, srcColor); 310 } 311 for (;;) { 312 int count = runs[0]; 313 SkASSERT(count >= 0); 314 if (count <= 0) { 315 return; 316 } 317 runs += count; 318 319 unsigned aa = antialias[0]; 320 antialias += count; 321 if (aa) { 322 if (aa == 255) { 323 if (ditherInt) { 324 sk_dither_memset16(device, srcColor, 325 ditherColor, count); 326 } else { 327 sk_memset16(device, srcColor, count); 328 } 329 } else { 330 // TODO: respect fDoDither 331 unsigned scale5 = SkAlpha255To256(aa) >> 3; 332 uint32_t src32 = srcExpanded * scale5; 333 scale5 = 32 - scale5; // now we can use it on the device 334 int n = count; 335 do { 336 uint32_t dst32 = SkExpand_rgb_16(*device) * scale5; 337 *device++ = SkCompact_rgb_16((src32 + dst32) >> 5); 338 } while (--n != 0); 339 goto DONE; 340 } 341 } 342 device += count; 343 344 DONE: 345 // if we have no dithering, this will always fail 346 if (count & ditherInt) { 347 SkTSwap(ditherColor, srcColor); 348 } 349 } 350} 351 352#define solid_8_pixels(mask, dst, color) \ 353 do { \ 354 if (mask & 0x80) dst[0] = color; \ 355 if (mask & 0x40) dst[1] = color; \ 356 if (mask & 0x20) dst[2] = color; \ 357 if (mask & 0x10) dst[3] = color; \ 358 if (mask & 0x08) dst[4] = color; \ 359 if (mask & 0x04) dst[5] = color; \ 360 if (mask & 0x02) dst[6] = color; \ 361 if (mask & 0x01) dst[7] = color; \ 362 } while (0) 363 364#define SK_BLITBWMASK_NAME SkRGB16_BlitBW 365#define SK_BLITBWMASK_ARGS , uint16_t color 366#define SK_BLITBWMASK_BLIT8(mask, dst) solid_8_pixels(mask, dst, color) 367#define SK_BLITBWMASK_GETADDR getAddr16 368#define SK_BLITBWMASK_DEVTYPE uint16_t 369#include "SkBlitBWMaskTemplate.h" 370 371static U16CPU blend_compact(uint32_t src32, uint32_t dst32, unsigned scale5) { 372 return SkCompact_rgb_16(dst32 + ((src32 - dst32) * scale5 >> 5)); 373} 374 375void SkRGB16_Opaque_Blitter::blitMask(const SkMask& mask, 376 const SkIRect& clip) { 377 if (mask.fFormat == SkMask::kBW_Format) { 378 SkRGB16_BlitBW(fDevice, mask, clip, fColor16); 379 return; 380 } 381 382 uint16_t* SK_RESTRICT device = fDevice.getAddr16(clip.fLeft, clip.fTop); 383 const uint8_t* SK_RESTRICT alpha = mask.getAddr8(clip.fLeft, clip.fTop); 384 int width = clip.width(); 385 int height = clip.height(); 386 size_t deviceRB = fDevice.rowBytes() - (width << 1); 387 unsigned maskRB = mask.fRowBytes - width; 388 uint32_t expanded32 = fExpandedRaw16; 389 390#if SK_ARM_NEON_IS_ALWAYS && defined(SK_CPU_LENDIAN) 391#define UNROLL 8 392 do { 393 int w = width; 394 if (w >= UNROLL) { 395 uint32x4_t color, dev_lo, dev_hi; 396 uint32x4_t wn1, wn2, tmp; 397 uint32x4_t vmask_g16, vmask_ng16; 398 uint16x8_t valpha, vdev; 399 uint16x4_t odev_lo, odev_hi, valpha_lo, valpha_hi; 400 401 // prepare constants 402 vmask_g16 = vdupq_n_u32(SK_G16_MASK_IN_PLACE); 403 vmask_ng16 = vdupq_n_u32(~SK_G16_MASK_IN_PLACE); 404 color = vdupq_n_u32(expanded32); 405 406 do { 407 // alpha is 8x8, widen and split to get a pair of 16x4 408 valpha = vaddw_u8(vdupq_n_u16(1), vld1_u8(alpha)); 409 valpha = vshrq_n_u16(valpha, 3); 410 valpha_lo = vget_low_u16(valpha); 411 valpha_hi = vget_high_u16(valpha); 412 413 // load pixels 414 vdev = vld1q_u16(device); 415 dev_lo = vmovl_u16(vget_low_u16(vdev)); 416 dev_hi = vmovl_u16(vget_high_u16(vdev)); 417 418 // unpack them in 32 bits 419 dev_lo = (dev_lo & vmask_ng16) | vshlq_n_u32(dev_lo & vmask_g16, 16); 420 dev_hi = (dev_hi & vmask_ng16) | vshlq_n_u32(dev_hi & vmask_g16, 16); 421 422 // blend with color 423 tmp = (color - dev_lo) * vmovl_u16(valpha_lo); 424 tmp = vshrq_n_u32(tmp, 5); 425 dev_lo += tmp; 426 427 tmp = vmulq_u32(color - dev_hi, vmovl_u16(valpha_hi)); 428 tmp = vshrq_n_u32(tmp, 5); 429 dev_hi += tmp; 430 431 // re-compact 432 wn1 = dev_lo & vmask_ng16; 433 wn2 = vshrq_n_u32(dev_lo, 16) & vmask_g16; 434 odev_lo = vmovn_u32(wn1 | wn2); 435 436 wn1 = dev_hi & vmask_ng16; 437 wn2 = vshrq_n_u32(dev_hi, 16) & vmask_g16; 438 odev_hi = vmovn_u32(wn1 | wn2); 439 440 // store 441 vst1q_u16(device, vcombine_u16(odev_lo, odev_hi)); 442 443 device += UNROLL; 444 alpha += UNROLL; 445 w -= UNROLL; 446 } while (w >= UNROLL); 447 } 448 449 // residuals 450 while (w > 0) { 451 *device = blend_compact(expanded32, SkExpand_rgb_16(*device), 452 SkAlpha255To256(*alpha++) >> 3); 453 device += 1; 454 --w; 455 } 456 device = (uint16_t*)((char*)device + deviceRB); 457 alpha += maskRB; 458 } while (--height != 0); 459#undef UNROLL 460#else // non-neon code 461 do { 462 int w = width; 463 do { 464 *device = blend_compact(expanded32, SkExpand_rgb_16(*device), 465 SkAlpha255To256(*alpha++) >> 3); 466 device += 1; 467 } while (--w != 0); 468 device = (uint16_t*)((char*)device + deviceRB); 469 alpha += maskRB; 470 } while (--height != 0); 471#endif 472} 473 474void SkRGB16_Opaque_Blitter::blitV(int x, int y, int height, SkAlpha alpha) { 475 uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); 476 size_t deviceRB = fDevice.rowBytes(); 477 478 // TODO: respect fDoDither 479 unsigned scale5 = SkAlpha255To256(alpha) >> 3; 480 uint32_t src32 = fExpandedRaw16 * scale5; 481 scale5 = 32 - scale5; 482 do { 483 uint32_t dst32 = SkExpand_rgb_16(*device) * scale5; 484 *device = SkCompact_rgb_16((src32 + dst32) >> 5); 485 device = (uint16_t*)((char*)device + deviceRB); 486 } while (--height != 0); 487} 488 489void SkRGB16_Opaque_Blitter::blitRect(int x, int y, int width, int height) { 490 SkASSERT(x + width <= fDevice.width() && y + height <= fDevice.height()); 491 uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); 492 size_t deviceRB = fDevice.rowBytes(); 493 uint16_t color16 = fColor16; 494 495 if (fDoDither) { 496 uint16_t ditherColor = fRawDither16; 497 if ((x ^ y) & 1) { 498 SkTSwap(ditherColor, color16); 499 } 500 while (--height >= 0) { 501 sk_dither_memset16(device, color16, ditherColor, width); 502 SkTSwap(ditherColor, color16); 503 device = (uint16_t*)((char*)device + deviceRB); 504 } 505 } else { // no dither 506 while (--height >= 0) { 507 sk_memset16(device, color16, width); 508 device = (uint16_t*)((char*)device + deviceRB); 509 } 510 } 511} 512 513/////////////////////////////////////////////////////////////////////////////// 514 515SkRGB16_Blitter::SkRGB16_Blitter(const SkBitmap& device, const SkPaint& paint) 516 : INHERITED(device) { 517 SkColor color = paint.getColor(); 518 519 fSrcColor32 = SkPreMultiplyColor(color); 520 fScale = SkAlpha255To256(SkColorGetA(color)); 521 522 int r = SkColorGetR(color); 523 int g = SkColorGetG(color); 524 int b = SkColorGetB(color); 525 526 fRawColor16 = fRawDither16 = SkPack888ToRGB16(r, g, b); 527 // if we're dithered, use fRawDither16 to hold that. 528 if ((fDoDither = paint.isDither()) != false) { 529 fRawDither16 = SkDitherPack888ToRGB16(r, g, b); 530 } 531 532 fExpandedRaw16 = SkExpand_rgb_16(fRawColor16); 533 534 fColor16 = SkPackRGB16( SkAlphaMul(r, fScale) >> (8 - SK_R16_BITS), 535 SkAlphaMul(g, fScale) >> (8 - SK_G16_BITS), 536 SkAlphaMul(b, fScale) >> (8 - SK_B16_BITS)); 537} 538 539const SkBitmap* SkRGB16_Blitter::justAnOpaqueColor(uint32_t* value) { 540 if (!fDoDither && 256 == fScale) { 541 *value = fRawColor16; 542 return &fDevice; 543 } 544 return NULL; 545} 546 547static uint32_t pmcolor_to_expand16(SkPMColor c) { 548 unsigned r = SkGetPackedR32(c); 549 unsigned g = SkGetPackedG32(c); 550 unsigned b = SkGetPackedB32(c); 551 return (g << 24) | (r << 13) | (b << 2); 552} 553 554static inline void blend32_16_row(SkPMColor src, uint16_t dst[], int count) { 555 SkASSERT(count > 0); 556 uint32_t src_expand = pmcolor_to_expand16(src); 557 unsigned scale = SkAlpha255To256(0xFF - SkGetPackedA32(src)) >> 3; 558 do { 559 uint32_t dst_expand = SkExpand_rgb_16(*dst) * scale; 560 *dst = SkCompact_rgb_16((src_expand + dst_expand) >> 5); 561 dst += 1; 562 } while (--count != 0); 563} 564 565void SkRGB16_Blitter::blitH(int x, int y, int width) { 566 SkASSERT(width > 0); 567 SkASSERT(x + width <= fDevice.width()); 568 uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); 569 570 // TODO: respect fDoDither 571 blend32_16_row(fSrcColor32, device, width); 572} 573 574void SkRGB16_Blitter::blitAntiH(int x, int y, 575 const SkAlpha* SK_RESTRICT antialias, 576 const int16_t* SK_RESTRICT runs) { 577 uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); 578 uint32_t srcExpanded = fExpandedRaw16; 579 unsigned scale = fScale; 580 581 // TODO: respect fDoDither 582 for (;;) { 583 int count = runs[0]; 584 SkASSERT(count >= 0); 585 if (count <= 0) { 586 return; 587 } 588 runs += count; 589 590 unsigned aa = antialias[0]; 591 antialias += count; 592 if (aa) { 593 unsigned scale5 = SkAlpha255To256(aa) * scale >> (8 + 3); 594 uint32_t src32 = srcExpanded * scale5; 595 scale5 = 32 - scale5; 596 do { 597 uint32_t dst32 = SkExpand_rgb_16(*device) * scale5; 598 *device++ = SkCompact_rgb_16((src32 + dst32) >> 5); 599 } while (--count != 0); 600 continue; 601 } 602 device += count; 603 } 604} 605 606static inline void blend_8_pixels(U8CPU bw, uint16_t dst[], unsigned dst_scale, 607 U16CPU srcColor) { 608 if (bw & 0x80) dst[0] = srcColor + SkAlphaMulRGB16(dst[0], dst_scale); 609 if (bw & 0x40) dst[1] = srcColor + SkAlphaMulRGB16(dst[1], dst_scale); 610 if (bw & 0x20) dst[2] = srcColor + SkAlphaMulRGB16(dst[2], dst_scale); 611 if (bw & 0x10) dst[3] = srcColor + SkAlphaMulRGB16(dst[3], dst_scale); 612 if (bw & 0x08) dst[4] = srcColor + SkAlphaMulRGB16(dst[4], dst_scale); 613 if (bw & 0x04) dst[5] = srcColor + SkAlphaMulRGB16(dst[5], dst_scale); 614 if (bw & 0x02) dst[6] = srcColor + SkAlphaMulRGB16(dst[6], dst_scale); 615 if (bw & 0x01) dst[7] = srcColor + SkAlphaMulRGB16(dst[7], dst_scale); 616} 617 618#define SK_BLITBWMASK_NAME SkRGB16_BlendBW 619#define SK_BLITBWMASK_ARGS , unsigned dst_scale, U16CPU src_color 620#define SK_BLITBWMASK_BLIT8(mask, dst) blend_8_pixels(mask, dst, dst_scale, src_color) 621#define SK_BLITBWMASK_GETADDR getAddr16 622#define SK_BLITBWMASK_DEVTYPE uint16_t 623#include "SkBlitBWMaskTemplate.h" 624 625void SkRGB16_Blitter::blitMask(const SkMask& mask, 626 const SkIRect& clip) { 627 if (mask.fFormat == SkMask::kBW_Format) { 628 SkRGB16_BlendBW(fDevice, mask, clip, 256 - fScale, fColor16); 629 return; 630 } 631 632 uint16_t* SK_RESTRICT device = fDevice.getAddr16(clip.fLeft, clip.fTop); 633 const uint8_t* SK_RESTRICT alpha = mask.getAddr8(clip.fLeft, clip.fTop); 634 int width = clip.width(); 635 int height = clip.height(); 636 size_t deviceRB = fDevice.rowBytes() - (width << 1); 637 unsigned maskRB = mask.fRowBytes - width; 638 uint32_t color32 = fExpandedRaw16; 639 640 unsigned scale256 = fScale; 641 do { 642 int w = width; 643 do { 644 unsigned aa = *alpha++; 645 unsigned scale = SkAlpha255To256(aa) * scale256 >> (8 + 3); 646 uint32_t src32 = color32 * scale; 647 uint32_t dst32 = SkExpand_rgb_16(*device) * (32 - scale); 648 *device++ = SkCompact_rgb_16((src32 + dst32) >> 5); 649 } while (--w != 0); 650 device = (uint16_t*)((char*)device + deviceRB); 651 alpha += maskRB; 652 } while (--height != 0); 653} 654 655void SkRGB16_Blitter::blitV(int x, int y, int height, SkAlpha alpha) { 656 uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); 657 size_t deviceRB = fDevice.rowBytes(); 658 659 // TODO: respect fDoDither 660 unsigned scale5 = SkAlpha255To256(alpha) * fScale >> (8 + 3); 661 uint32_t src32 = fExpandedRaw16 * scale5; 662 scale5 = 32 - scale5; 663 do { 664 uint32_t dst32 = SkExpand_rgb_16(*device) * scale5; 665 *device = SkCompact_rgb_16((src32 + dst32) >> 5); 666 device = (uint16_t*)((char*)device + deviceRB); 667 } while (--height != 0); 668} 669 670void SkRGB16_Blitter::blitRect(int x, int y, int width, int height) { 671 SkASSERT(x + width <= fDevice.width() && y + height <= fDevice.height()); 672 uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); 673 size_t deviceRB = fDevice.rowBytes(); 674 SkPMColor src32 = fSrcColor32; 675 676 while (--height >= 0) { 677 blend32_16_row(src32, device, width); 678 device = (uint16_t*)((char*)device + deviceRB); 679 } 680} 681 682/////////////////////////////////////////////////////////////////////////////// 683 684SkRGB16_Shader16_Blitter::SkRGB16_Shader16_Blitter(const SkBitmap& device, 685 const SkPaint& paint, 686 SkShader::Context* shaderContext) 687 : SkRGB16_Shader_Blitter(device, paint, shaderContext) { 688 SkASSERT(SkShader::CanCallShadeSpan16(fShaderFlags)); 689} 690 691void SkRGB16_Shader16_Blitter::blitH(int x, int y, int width) { 692 SkASSERT(x + width <= fDevice.width()); 693 694 uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); 695 SkShader::Context* shaderContext = fShaderContext; 696 697 int alpha = shaderContext->getSpan16Alpha(); 698 if (0xFF == alpha) { 699 shaderContext->shadeSpan16(x, y, device, width); 700 } else { 701 uint16_t* span16 = (uint16_t*)fBuffer; 702 shaderContext->shadeSpan16(x, y, span16, width); 703 SkBlendRGB16(span16, device, SkAlpha255To256(alpha), width); 704 } 705} 706 707void SkRGB16_Shader16_Blitter::blitRect(int x, int y, int width, int height) { 708 SkShader::Context* shaderContext = fShaderContext; 709 uint16_t* dst = fDevice.getAddr16(x, y); 710 size_t dstRB = fDevice.rowBytes(); 711 int alpha = shaderContext->getSpan16Alpha(); 712 713 if (0xFF == alpha) { 714 if (fShaderFlags & SkShader::kConstInY16_Flag) { 715 // have the shader blit directly into the device the first time 716 shaderContext->shadeSpan16(x, y, dst, width); 717 // and now just memcpy that line on the subsequent lines 718 if (--height > 0) { 719 const uint16_t* orig = dst; 720 do { 721 dst = (uint16_t*)((char*)dst + dstRB); 722 memcpy(dst, orig, width << 1); 723 } while (--height); 724 } 725 } else { // need to call shadeSpan16 for every line 726 do { 727 shaderContext->shadeSpan16(x, y, dst, width); 728 y += 1; 729 dst = (uint16_t*)((char*)dst + dstRB); 730 } while (--height); 731 } 732 } else { 733 int scale = SkAlpha255To256(alpha); 734 uint16_t* span16 = (uint16_t*)fBuffer; 735 if (fShaderFlags & SkShader::kConstInY16_Flag) { 736 shaderContext->shadeSpan16(x, y, span16, width); 737 do { 738 SkBlendRGB16(span16, dst, scale, width); 739 dst = (uint16_t*)((char*)dst + dstRB); 740 } while (--height); 741 } else { 742 do { 743 shaderContext->shadeSpan16(x, y, span16, width); 744 SkBlendRGB16(span16, dst, scale, width); 745 y += 1; 746 dst = (uint16_t*)((char*)dst + dstRB); 747 } while (--height); 748 } 749 } 750} 751 752void SkRGB16_Shader16_Blitter::blitAntiH(int x, int y, 753 const SkAlpha* SK_RESTRICT antialias, 754 const int16_t* SK_RESTRICT runs) { 755 SkShader::Context* shaderContext = fShaderContext; 756 SkPMColor* SK_RESTRICT span = fBuffer; 757 uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); 758 759 int alpha = shaderContext->getSpan16Alpha(); 760 uint16_t* span16 = (uint16_t*)span; 761 762 if (0xFF == alpha) { 763 for (;;) { 764 int count = *runs; 765 if (count <= 0) { 766 break; 767 } 768 SkASSERT(count <= fDevice.width()); // don't overrun fBuffer 769 770 int aa = *antialias; 771 if (aa == 255) { 772 // go direct to the device! 773 shaderContext->shadeSpan16(x, y, device, count); 774 } else if (aa) { 775 shaderContext->shadeSpan16(x, y, span16, count); 776 SkBlendRGB16(span16, device, SkAlpha255To256(aa), count); 777 } 778 device += count; 779 runs += count; 780 antialias += count; 781 x += count; 782 } 783 } else { // span alpha is < 255 784 alpha = SkAlpha255To256(alpha); 785 for (;;) { 786 int count = *runs; 787 if (count <= 0) { 788 break; 789 } 790 SkASSERT(count <= fDevice.width()); // don't overrun fBuffer 791 792 int aa = SkAlphaMul(*antialias, alpha); 793 if (aa) { 794 shaderContext->shadeSpan16(x, y, span16, count); 795 SkBlendRGB16(span16, device, SkAlpha255To256(aa), count); 796 } 797 798 device += count; 799 runs += count; 800 antialias += count; 801 x += count; 802 } 803 } 804} 805 806/////////////////////////////////////////////////////////////////////////////// 807 808SkRGB16_Shader_Blitter::SkRGB16_Shader_Blitter(const SkBitmap& device, 809 const SkPaint& paint, 810 SkShader::Context* shaderContext) 811: INHERITED(device, paint, shaderContext) { 812 SkASSERT(paint.getXfermode() == NULL); 813 814 fBuffer = (SkPMColor*)sk_malloc_throw(device.width() * sizeof(SkPMColor)); 815 816 // compute SkBlitRow::Procs 817 unsigned flags = 0; 818 819 uint32_t shaderFlags = fShaderFlags; 820 // shaders take care of global alpha, so we never set it in SkBlitRow 821 if (!(shaderFlags & SkShader::kOpaqueAlpha_Flag)) { 822 flags |= SkBlitRow::kSrcPixelAlpha_Flag; 823 } 824 // don't dither if the shader is really 16bit 825 if (paint.isDither() && !(shaderFlags & SkShader::kIntrinsicly16_Flag)) { 826 flags |= SkBlitRow::kDither_Flag; 827 } 828 // used when we know our global alpha is 0xFF 829 fOpaqueProc = SkBlitRow::Factory(flags, SkBitmap::kRGB_565_Config); 830 // used when we know our global alpha is < 0xFF 831 fAlphaProc = SkBlitRow::Factory(flags | SkBlitRow::kGlobalAlpha_Flag, 832 SkBitmap::kRGB_565_Config); 833} 834 835SkRGB16_Shader_Blitter::~SkRGB16_Shader_Blitter() { 836 sk_free(fBuffer); 837} 838 839void SkRGB16_Shader_Blitter::blitH(int x, int y, int width) { 840 SkASSERT(x + width <= fDevice.width()); 841 842 fShaderContext->shadeSpan(x, y, fBuffer, width); 843 // shaders take care of global alpha, so we pass 0xFF (should be ignored) 844 fOpaqueProc(fDevice.getAddr16(x, y), fBuffer, width, 0xFF, x, y); 845} 846 847void SkRGB16_Shader_Blitter::blitRect(int x, int y, int width, int height) { 848 SkShader::Context* shaderContext = fShaderContext; 849 SkBlitRow::Proc proc = fOpaqueProc; 850 SkPMColor* buffer = fBuffer; 851 uint16_t* dst = fDevice.getAddr16(x, y); 852 size_t dstRB = fDevice.rowBytes(); 853 854 if (fShaderFlags & SkShader::kConstInY32_Flag) { 855 shaderContext->shadeSpan(x, y, buffer, width); 856 do { 857 proc(dst, buffer, width, 0xFF, x, y); 858 y += 1; 859 dst = (uint16_t*)((char*)dst + dstRB); 860 } while (--height); 861 } else { 862 do { 863 shaderContext->shadeSpan(x, y, buffer, width); 864 proc(dst, buffer, width, 0xFF, x, y); 865 y += 1; 866 dst = (uint16_t*)((char*)dst + dstRB); 867 } while (--height); 868 } 869} 870 871static inline int count_nonzero_span(const int16_t runs[], const SkAlpha aa[]) { 872 int count = 0; 873 for (;;) { 874 int n = *runs; 875 if (n == 0 || *aa == 0) { 876 break; 877 } 878 runs += n; 879 aa += n; 880 count += n; 881 } 882 return count; 883} 884 885void SkRGB16_Shader_Blitter::blitAntiH(int x, int y, 886 const SkAlpha* SK_RESTRICT antialias, 887 const int16_t* SK_RESTRICT runs) { 888 SkShader::Context* shaderContext = fShaderContext; 889 SkPMColor* SK_RESTRICT span = fBuffer; 890 uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); 891 892 for (;;) { 893 int count = *runs; 894 if (count <= 0) { 895 break; 896 } 897 int aa = *antialias; 898 if (0 == aa) { 899 device += count; 900 runs += count; 901 antialias += count; 902 x += count; 903 continue; 904 } 905 906 int nonZeroCount = count + count_nonzero_span(runs + count, antialias + count); 907 908 SkASSERT(nonZeroCount <= fDevice.width()); // don't overrun fBuffer 909 shaderContext->shadeSpan(x, y, span, nonZeroCount); 910 911 SkPMColor* localSpan = span; 912 for (;;) { 913 SkBlitRow::Proc proc = (aa == 0xFF) ? fOpaqueProc : fAlphaProc; 914 proc(device, localSpan, count, aa, x, y); 915 916 x += count; 917 device += count; 918 runs += count; 919 antialias += count; 920 nonZeroCount -= count; 921 if (nonZeroCount == 0) { 922 break; 923 } 924 localSpan += count; 925 SkASSERT(nonZeroCount > 0); 926 count = *runs; 927 SkASSERT(count > 0); 928 aa = *antialias; 929 } 930 } 931} 932 933/////////////////////////////////////////////////////////////////////// 934 935SkRGB16_Shader_Xfermode_Blitter::SkRGB16_Shader_Xfermode_Blitter( 936 const SkBitmap& device, const SkPaint& paint, 937 SkShader::Context* shaderContext) 938: INHERITED(device, paint, shaderContext) { 939 fXfermode = paint.getXfermode(); 940 SkASSERT(fXfermode); 941 fXfermode->ref(); 942 943 int width = device.width(); 944 fBuffer = (SkPMColor*)sk_malloc_throw((width + (SkAlign4(width) >> 2)) * sizeof(SkPMColor)); 945 fAAExpand = (uint8_t*)(fBuffer + width); 946} 947 948SkRGB16_Shader_Xfermode_Blitter::~SkRGB16_Shader_Xfermode_Blitter() { 949 fXfermode->unref(); 950 sk_free(fBuffer); 951} 952 953void SkRGB16_Shader_Xfermode_Blitter::blitH(int x, int y, int width) { 954 SkASSERT(x + width <= fDevice.width()); 955 956 uint16_t* device = fDevice.getAddr16(x, y); 957 SkPMColor* span = fBuffer; 958 959 fShaderContext->shadeSpan(x, y, span, width); 960 fXfermode->xfer16(device, span, width, NULL); 961} 962 963void SkRGB16_Shader_Xfermode_Blitter::blitAntiH(int x, int y, 964 const SkAlpha* SK_RESTRICT antialias, 965 const int16_t* SK_RESTRICT runs) { 966 SkShader::Context* shaderContext = fShaderContext; 967 SkXfermode* mode = fXfermode; 968 SkPMColor* SK_RESTRICT span = fBuffer; 969 uint8_t* SK_RESTRICT aaExpand = fAAExpand; 970 uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); 971 972 for (;;) { 973 int count = *runs; 974 if (count <= 0) { 975 break; 976 } 977 int aa = *antialias; 978 if (0 == aa) { 979 device += count; 980 runs += count; 981 antialias += count; 982 x += count; 983 continue; 984 } 985 986 int nonZeroCount = count + count_nonzero_span(runs + count, 987 antialias + count); 988 989 SkASSERT(nonZeroCount <= fDevice.width()); // don't overrun fBuffer 990 shaderContext->shadeSpan(x, y, span, nonZeroCount); 991 992 x += nonZeroCount; 993 SkPMColor* localSpan = span; 994 for (;;) { 995 if (aa == 0xFF) { 996 mode->xfer16(device, localSpan, count, NULL); 997 } else { 998 SkASSERT(aa); 999 memset(aaExpand, aa, count); 1000 mode->xfer16(device, localSpan, count, aaExpand); 1001 } 1002 device += count; 1003 runs += count; 1004 antialias += count; 1005 nonZeroCount -= count; 1006 if (nonZeroCount == 0) { 1007 break; 1008 } 1009 localSpan += count; 1010 SkASSERT(nonZeroCount > 0); 1011 count = *runs; 1012 SkASSERT(count > 0); 1013 aa = *antialias; 1014 } 1015 } 1016} 1017 1018/////////////////////////////////////////////////////////////////////////////// 1019 1020SkBlitter* SkBlitter_ChooseD565(const SkBitmap& device, const SkPaint& paint, 1021 SkShader::Context* shaderContext, 1022 SkTBlitterAllocator* allocator) { 1023 SkASSERT(allocator != NULL); 1024 1025 SkBlitter* blitter; 1026 SkShader* shader = paint.getShader(); 1027 SkXfermode* mode = paint.getXfermode(); 1028 1029 // we require a shader if there is an xfermode, handled by our caller 1030 SkASSERT(NULL == mode || NULL != shader); 1031 1032 if (shader) { 1033 SkASSERT(shaderContext != NULL); 1034 if (mode) { 1035 blitter = allocator->createT<SkRGB16_Shader_Xfermode_Blitter>(device, paint, 1036 shaderContext); 1037 } else if (shaderContext->canCallShadeSpan16()) { 1038 blitter = allocator->createT<SkRGB16_Shader16_Blitter>(device, paint, shaderContext); 1039 } else { 1040 blitter = allocator->createT<SkRGB16_Shader_Blitter>(device, paint, shaderContext); 1041 } 1042 } else { 1043 // no shader, no xfermode, (and we always ignore colorfilter) 1044 SkColor color = paint.getColor(); 1045 if (0 == SkColorGetA(color)) { 1046 blitter = allocator->createT<SkNullBlitter>(); 1047#ifdef USE_BLACK_BLITTER 1048 } else if (SK_ColorBLACK == color) { 1049 blitter = allocator->createT<SkRGB16_Black_Blitter>(device, paint); 1050#endif 1051 } else if (0xFF == SkColorGetA(color)) { 1052 blitter = allocator->createT<SkRGB16_Opaque_Blitter>(device, paint); 1053 } else { 1054 blitter = allocator->createT<SkRGB16_Blitter>(device, paint); 1055 } 1056 } 1057 1058 return blitter; 1059} 1060