SkBlitter_RGB16.cpp revision 6e5671d8c9b2d9885e351b631b1dfbb4ed403789
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 virtual ~SkRGB16_Shader_Blitter(); 112 virtual void blitH(int x, int y, int width); 113 virtual void blitAntiH(int x, int y, const SkAlpha* antialias, 114 const int16_t* runs); 115 virtual void blitRect(int x, int y, int width, int height); 116 117protected: 118 SkPMColor* fBuffer; 119 SkBlitRow::Proc fOpaqueProc; 120 SkBlitRow::Proc fAlphaProc; 121 122private: 123 // illegal 124 SkRGB16_Shader_Blitter& operator=(const SkRGB16_Shader_Blitter&); 125 126 typedef SkShaderBlitter INHERITED; 127}; 128 129// used only if the shader can perform shadSpan16 130class SkRGB16_Shader16_Blitter : public SkRGB16_Shader_Blitter { 131public: 132 SkRGB16_Shader16_Blitter(const SkBitmap& device, const SkPaint& paint); 133 virtual void blitH(int x, int y, int width); 134 virtual void blitAntiH(int x, int y, const SkAlpha* antialias, 135 const int16_t* runs); 136 virtual void blitRect(int x, int y, int width, int height); 137 138private: 139 typedef SkRGB16_Shader_Blitter INHERITED; 140}; 141 142class SkRGB16_Shader_Xfermode_Blitter : public SkShaderBlitter { 143public: 144 SkRGB16_Shader_Xfermode_Blitter(const SkBitmap& device, const SkPaint& paint); 145 virtual ~SkRGB16_Shader_Xfermode_Blitter(); 146 virtual void blitH(int x, int y, int width); 147 virtual void blitAntiH(int x, int y, const SkAlpha* antialias, 148 const int16_t* runs); 149 150private: 151 SkXfermode* fXfermode; 152 SkPMColor* fBuffer; 153 uint8_t* fAAExpand; 154 155 // illegal 156 SkRGB16_Shader_Xfermode_Blitter& operator=(const SkRGB16_Shader_Xfermode_Blitter&); 157 158 typedef SkShaderBlitter INHERITED; 159}; 160 161/////////////////////////////////////////////////////////////////////////////// 162#ifdef USE_BLACK_BLITTER 163SkRGB16_Black_Blitter::SkRGB16_Black_Blitter(const SkBitmap& device, const SkPaint& paint) 164 : INHERITED(device, paint) { 165 SkASSERT(paint.getShader() == NULL); 166 SkASSERT(paint.getColorFilter() == NULL); 167 SkASSERT(paint.getXfermode() == NULL); 168 SkASSERT(paint.getColor() == SK_ColorBLACK); 169} 170 171#if 1 172#define black_8_pixels(mask, dst) \ 173 do { \ 174 if (mask & 0x80) dst[0] = 0; \ 175 if (mask & 0x40) dst[1] = 0; \ 176 if (mask & 0x20) dst[2] = 0; \ 177 if (mask & 0x10) dst[3] = 0; \ 178 if (mask & 0x08) dst[4] = 0; \ 179 if (mask & 0x04) dst[5] = 0; \ 180 if (mask & 0x02) dst[6] = 0; \ 181 if (mask & 0x01) dst[7] = 0; \ 182 } while (0) 183#else 184static inline black_8_pixels(U8CPU mask, uint16_t dst[]) 185{ 186 if (mask & 0x80) dst[0] = 0; 187 if (mask & 0x40) dst[1] = 0; 188 if (mask & 0x20) dst[2] = 0; 189 if (mask & 0x10) dst[3] = 0; 190 if (mask & 0x08) dst[4] = 0; 191 if (mask & 0x04) dst[5] = 0; 192 if (mask & 0x02) dst[6] = 0; 193 if (mask & 0x01) dst[7] = 0; 194} 195#endif 196 197#define SK_BLITBWMASK_NAME SkRGB16_Black_BlitBW 198#define SK_BLITBWMASK_ARGS 199#define SK_BLITBWMASK_BLIT8(mask, dst) black_8_pixels(mask, dst) 200#define SK_BLITBWMASK_GETADDR getAddr16 201#define SK_BLITBWMASK_DEVTYPE uint16_t 202#include "SkBlitBWMaskTemplate.h" 203 204void SkRGB16_Black_Blitter::blitMask(const SkMask& mask, 205 const SkIRect& clip) { 206 if (mask.fFormat == SkMask::kBW_Format) { 207 SkRGB16_Black_BlitBW(fDevice, mask, clip); 208 } else { 209 uint16_t* SK_RESTRICT device = fDevice.getAddr16(clip.fLeft, clip.fTop); 210 const uint8_t* SK_RESTRICT alpha = mask.getAddr8(clip.fLeft, clip.fTop); 211 unsigned width = clip.width(); 212 unsigned height = clip.height(); 213 size_t deviceRB = fDevice.rowBytes() - (width << 1); 214 unsigned maskRB = mask.fRowBytes - width; 215 216 SkASSERT((int)height > 0); 217 SkASSERT((int)width > 0); 218 SkASSERT((int)deviceRB >= 0); 219 SkASSERT((int)maskRB >= 0); 220 221 do { 222 unsigned w = width; 223 do { 224 unsigned aa = *alpha++; 225 *device = SkAlphaMulRGB16(*device, SkAlpha255To256(255 - aa)); 226 device += 1; 227 } while (--w != 0); 228 device = (uint16_t*)((char*)device + deviceRB); 229 alpha += maskRB; 230 } while (--height != 0); 231 } 232} 233 234void SkRGB16_Black_Blitter::blitAntiH(int x, int y, 235 const SkAlpha* SK_RESTRICT antialias, 236 const int16_t* SK_RESTRICT runs) { 237 uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); 238 239 for (;;) { 240 int count = runs[0]; 241 SkASSERT(count >= 0); 242 if (count <= 0) { 243 return; 244 } 245 runs += count; 246 247 unsigned aa = antialias[0]; 248 antialias += count; 249 if (aa) { 250 if (aa == 255) { 251 memset(device, 0, count << 1); 252 } else { 253 aa = SkAlpha255To256(255 - aa); 254 do { 255 *device = SkAlphaMulRGB16(*device, aa); 256 device += 1; 257 } while (--count != 0); 258 continue; 259 } 260 } 261 device += count; 262 } 263} 264#endif 265 266/////////////////////////////////////////////////////////////////////////////// 267/////////////////////////////////////////////////////////////////////////////// 268 269SkRGB16_Opaque_Blitter::SkRGB16_Opaque_Blitter(const SkBitmap& device, 270 const SkPaint& paint) 271: INHERITED(device, paint) {} 272 273void SkRGB16_Opaque_Blitter::blitH(int x, int y, int width) { 274 SkASSERT(width > 0); 275 SkASSERT(x + width <= fDevice.width()); 276 uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); 277 uint16_t srcColor = fColor16; 278 279 SkASSERT(fRawColor16 == srcColor); 280 if (fDoDither) { 281 uint16_t ditherColor = fRawDither16; 282 if ((x ^ y) & 1) { 283 SkTSwap(ditherColor, srcColor); 284 } 285 sk_dither_memset16(device, srcColor, ditherColor, width); 286 } else { 287 sk_memset16(device, srcColor, width); 288 } 289} 290 291// return 1 or 0 from a bool 292static inline int Bool2Int(int value) { 293 return !!value; 294} 295 296void SkRGB16_Opaque_Blitter::blitAntiH(int x, int y, 297 const SkAlpha* SK_RESTRICT antialias, 298 const int16_t* SK_RESTRICT runs) { 299 uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); 300 uint16_t srcColor = fRawColor16; 301 uint32_t srcExpanded = fExpandedRaw16; 302 int ditherInt = Bool2Int(fDoDither); 303 uint16_t ditherColor = fRawDither16; 304 // if we have no dithering, this will always fail 305 if ((x ^ y) & ditherInt) { 306 SkTSwap(ditherColor, srcColor); 307 } 308 for (;;) { 309 int count = runs[0]; 310 SkASSERT(count >= 0); 311 if (count <= 0) { 312 return; 313 } 314 runs += count; 315 316 unsigned aa = antialias[0]; 317 antialias += count; 318 if (aa) { 319 if (aa == 255) { 320 if (ditherInt) { 321 sk_dither_memset16(device, srcColor, 322 ditherColor, count); 323 } else { 324 sk_memset16(device, srcColor, count); 325 } 326 } else { 327 // TODO: respect fDoDither 328 unsigned scale5 = SkAlpha255To256(aa) >> 3; 329 uint32_t src32 = srcExpanded * scale5; 330 scale5 = 32 - scale5; // now we can use it on the device 331 int n = count; 332 do { 333 uint32_t dst32 = SkExpand_rgb_16(*device) * scale5; 334 *device++ = SkCompact_rgb_16((src32 + dst32) >> 5); 335 } while (--n != 0); 336 goto DONE; 337 } 338 } 339 device += count; 340 341 DONE: 342 // if we have no dithering, this will always fail 343 if (count & ditherInt) { 344 SkTSwap(ditherColor, srcColor); 345 } 346 } 347} 348 349#define solid_8_pixels(mask, dst, color) \ 350 do { \ 351 if (mask & 0x80) dst[0] = color; \ 352 if (mask & 0x40) dst[1] = color; \ 353 if (mask & 0x20) dst[2] = color; \ 354 if (mask & 0x10) dst[3] = color; \ 355 if (mask & 0x08) dst[4] = color; \ 356 if (mask & 0x04) dst[5] = color; \ 357 if (mask & 0x02) dst[6] = color; \ 358 if (mask & 0x01) dst[7] = color; \ 359 } while (0) 360 361#define SK_BLITBWMASK_NAME SkRGB16_BlitBW 362#define SK_BLITBWMASK_ARGS , uint16_t color 363#define SK_BLITBWMASK_BLIT8(mask, dst) solid_8_pixels(mask, dst, color) 364#define SK_BLITBWMASK_GETADDR getAddr16 365#define SK_BLITBWMASK_DEVTYPE uint16_t 366#include "SkBlitBWMaskTemplate.h" 367 368static U16CPU blend_compact(uint32_t src32, uint32_t dst32, unsigned scale5) { 369 return SkCompact_rgb_16(dst32 + ((src32 - dst32) * scale5 >> 5)); 370} 371 372void SkRGB16_Opaque_Blitter::blitMask(const SkMask& mask, 373 const SkIRect& clip) { 374 if (mask.fFormat == SkMask::kBW_Format) { 375 SkRGB16_BlitBW(fDevice, mask, clip, fColor16); 376 return; 377 } 378 379 uint16_t* SK_RESTRICT device = fDevice.getAddr16(clip.fLeft, clip.fTop); 380 const uint8_t* SK_RESTRICT alpha = mask.getAddr8(clip.fLeft, clip.fTop); 381 int width = clip.width(); 382 int height = clip.height(); 383 size_t deviceRB = fDevice.rowBytes() - (width << 1); 384 unsigned maskRB = mask.fRowBytes - width; 385 uint32_t expanded32 = fExpandedRaw16; 386 387#if SK_ARM_NEON_IS_ALWAYS && defined(SK_CPU_LENDIAN) 388#define UNROLL 8 389 do { 390 int w = width; 391 if (w >= UNROLL) { 392 uint32x4_t color, dev_lo, dev_hi; 393 uint32x4_t wn1, wn2, tmp; 394 uint32x4_t vmask_g16, vmask_ng16; 395 uint16x8_t valpha, vdev; 396 uint16x4_t odev_lo, odev_hi, valpha_lo, valpha_hi; 397 398 // prepare constants 399 vmask_g16 = vdupq_n_u32(SK_G16_MASK_IN_PLACE); 400 vmask_ng16 = vdupq_n_u32(~SK_G16_MASK_IN_PLACE); 401 color = vdupq_n_u32(expanded32); 402 403 do { 404 // alpha is 8x8, widen and split to get a pair of 16x4 405 valpha = vaddw_u8(vdupq_n_u16(1), vld1_u8(alpha)); 406 valpha = vshrq_n_u16(valpha, 3); 407 valpha_lo = vget_low_u16(valpha); 408 valpha_hi = vget_high_u16(valpha); 409 410 // load pixels 411 vdev = vld1q_u16(device); 412 dev_lo = vmovl_u16(vget_low_u16(vdev)); 413 dev_hi = vmovl_u16(vget_high_u16(vdev)); 414 415 // unpack them in 32 bits 416 dev_lo = (dev_lo & vmask_ng16) | vshlq_n_u32(dev_lo & vmask_g16, 16); 417 dev_hi = (dev_hi & vmask_ng16) | vshlq_n_u32(dev_hi & vmask_g16, 16); 418 419 // blend with color 420 tmp = (color - dev_lo) * vmovl_u16(valpha_lo); 421 tmp = vshrq_n_u32(tmp, 5); 422 dev_lo += tmp; 423 424 tmp = vmulq_u32(color - dev_hi, vmovl_u16(valpha_hi)); 425 tmp = vshrq_n_u32(tmp, 5); 426 dev_hi += tmp; 427 428 // re-compact 429 wn1 = dev_lo & vmask_ng16; 430 wn2 = vshrq_n_u32(dev_lo, 16) & vmask_g16; 431 odev_lo = vmovn_u32(wn1 | wn2); 432 433 wn1 = dev_hi & vmask_ng16; 434 wn2 = vshrq_n_u32(dev_hi, 16) & vmask_g16; 435 odev_hi = vmovn_u32(wn1 | wn2); 436 437 // store 438 vst1q_u16(device, vcombine_u16(odev_lo, odev_hi)); 439 440 device += UNROLL; 441 alpha += UNROLL; 442 w -= UNROLL; 443 } while (w >= UNROLL); 444 } 445 446 // residuals 447 while (w > 0) { 448 *device = blend_compact(expanded32, SkExpand_rgb_16(*device), 449 SkAlpha255To256(*alpha++) >> 3); 450 device += 1; 451 --w; 452 } 453 device = (uint16_t*)((char*)device + deviceRB); 454 alpha += maskRB; 455 } while (--height != 0); 456#undef UNROLL 457#else // non-neon code 458 do { 459 int w = width; 460 do { 461 *device = blend_compact(expanded32, SkExpand_rgb_16(*device), 462 SkAlpha255To256(*alpha++) >> 3); 463 device += 1; 464 } while (--w != 0); 465 device = (uint16_t*)((char*)device + deviceRB); 466 alpha += maskRB; 467 } while (--height != 0); 468#endif 469} 470 471void SkRGB16_Opaque_Blitter::blitV(int x, int y, int height, SkAlpha alpha) { 472 uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); 473 size_t deviceRB = fDevice.rowBytes(); 474 475 // TODO: respect fDoDither 476 unsigned scale5 = SkAlpha255To256(alpha) >> 3; 477 uint32_t src32 = fExpandedRaw16 * scale5; 478 scale5 = 32 - scale5; 479 do { 480 uint32_t dst32 = SkExpand_rgb_16(*device) * scale5; 481 *device = SkCompact_rgb_16((src32 + dst32) >> 5); 482 device = (uint16_t*)((char*)device + deviceRB); 483 } while (--height != 0); 484} 485 486void SkRGB16_Opaque_Blitter::blitRect(int x, int y, int width, int height) { 487 SkASSERT(x + width <= fDevice.width() && y + height <= fDevice.height()); 488 uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); 489 size_t deviceRB = fDevice.rowBytes(); 490 uint16_t color16 = fColor16; 491 492 if (fDoDither) { 493 uint16_t ditherColor = fRawDither16; 494 if ((x ^ y) & 1) { 495 SkTSwap(ditherColor, color16); 496 } 497 while (--height >= 0) { 498 sk_dither_memset16(device, color16, ditherColor, width); 499 SkTSwap(ditherColor, color16); 500 device = (uint16_t*)((char*)device + deviceRB); 501 } 502 } else { // no dither 503 while (--height >= 0) { 504 sk_memset16(device, color16, width); 505 device = (uint16_t*)((char*)device + deviceRB); 506 } 507 } 508} 509 510/////////////////////////////////////////////////////////////////////////////// 511 512SkRGB16_Blitter::SkRGB16_Blitter(const SkBitmap& device, const SkPaint& paint) 513 : INHERITED(device) { 514 SkColor color = paint.getColor(); 515 516 fSrcColor32 = SkPreMultiplyColor(color); 517 fScale = SkAlpha255To256(SkColorGetA(color)); 518 519 int r = SkColorGetR(color); 520 int g = SkColorGetG(color); 521 int b = SkColorGetB(color); 522 523 fRawColor16 = fRawDither16 = SkPack888ToRGB16(r, g, b); 524 // if we're dithered, use fRawDither16 to hold that. 525 if ((fDoDither = paint.isDither()) != false) { 526 fRawDither16 = SkDitherPack888ToRGB16(r, g, b); 527 } 528 529 fExpandedRaw16 = SkExpand_rgb_16(fRawColor16); 530 531 fColor16 = SkPackRGB16( SkAlphaMul(r, fScale) >> (8 - SK_R16_BITS), 532 SkAlphaMul(g, fScale) >> (8 - SK_G16_BITS), 533 SkAlphaMul(b, fScale) >> (8 - SK_B16_BITS)); 534} 535 536const SkBitmap* SkRGB16_Blitter::justAnOpaqueColor(uint32_t* value) { 537 if (!fDoDither && 256 == fScale) { 538 *value = fRawColor16; 539 return &fDevice; 540 } 541 return NULL; 542} 543 544static uint32_t pmcolor_to_expand16(SkPMColor c) { 545 unsigned r = SkGetPackedR32(c); 546 unsigned g = SkGetPackedG32(c); 547 unsigned b = SkGetPackedB32(c); 548 return (g << 24) | (r << 13) | (b << 2); 549} 550 551static inline void blend32_16_row(SkPMColor src, uint16_t dst[], int count) { 552 SkASSERT(count > 0); 553 uint32_t src_expand = pmcolor_to_expand16(src); 554 unsigned scale = SkAlpha255To256(0xFF - SkGetPackedA32(src)) >> 3; 555 do { 556 uint32_t dst_expand = SkExpand_rgb_16(*dst) * scale; 557 *dst = SkCompact_rgb_16((src_expand + dst_expand) >> 5); 558 dst += 1; 559 } while (--count != 0); 560} 561 562void SkRGB16_Blitter::blitH(int x, int y, int width) { 563 SkASSERT(width > 0); 564 SkASSERT(x + width <= fDevice.width()); 565 uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); 566 567 // TODO: respect fDoDither 568 blend32_16_row(fSrcColor32, device, width); 569} 570 571void SkRGB16_Blitter::blitAntiH(int x, int y, 572 const SkAlpha* SK_RESTRICT antialias, 573 const int16_t* SK_RESTRICT runs) { 574 uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); 575 uint32_t srcExpanded = fExpandedRaw16; 576 unsigned scale = fScale; 577 578 // TODO: respect fDoDither 579 for (;;) { 580 int count = runs[0]; 581 SkASSERT(count >= 0); 582 if (count <= 0) { 583 return; 584 } 585 runs += count; 586 587 unsigned aa = antialias[0]; 588 antialias += count; 589 if (aa) { 590 unsigned scale5 = SkAlpha255To256(aa) * scale >> (8 + 3); 591 uint32_t src32 = srcExpanded * scale5; 592 scale5 = 32 - scale5; 593 do { 594 uint32_t dst32 = SkExpand_rgb_16(*device) * scale5; 595 *device++ = SkCompact_rgb_16((src32 + dst32) >> 5); 596 } while (--count != 0); 597 continue; 598 } 599 device += count; 600 } 601} 602 603static inline void blend_8_pixels(U8CPU bw, uint16_t dst[], unsigned dst_scale, 604 U16CPU srcColor) { 605 if (bw & 0x80) dst[0] = srcColor + SkAlphaMulRGB16(dst[0], dst_scale); 606 if (bw & 0x40) dst[1] = srcColor + SkAlphaMulRGB16(dst[1], dst_scale); 607 if (bw & 0x20) dst[2] = srcColor + SkAlphaMulRGB16(dst[2], dst_scale); 608 if (bw & 0x10) dst[3] = srcColor + SkAlphaMulRGB16(dst[3], dst_scale); 609 if (bw & 0x08) dst[4] = srcColor + SkAlphaMulRGB16(dst[4], dst_scale); 610 if (bw & 0x04) dst[5] = srcColor + SkAlphaMulRGB16(dst[5], dst_scale); 611 if (bw & 0x02) dst[6] = srcColor + SkAlphaMulRGB16(dst[6], dst_scale); 612 if (bw & 0x01) dst[7] = srcColor + SkAlphaMulRGB16(dst[7], dst_scale); 613} 614 615#define SK_BLITBWMASK_NAME SkRGB16_BlendBW 616#define SK_BLITBWMASK_ARGS , unsigned dst_scale, U16CPU src_color 617#define SK_BLITBWMASK_BLIT8(mask, dst) blend_8_pixels(mask, dst, dst_scale, src_color) 618#define SK_BLITBWMASK_GETADDR getAddr16 619#define SK_BLITBWMASK_DEVTYPE uint16_t 620#include "SkBlitBWMaskTemplate.h" 621 622void SkRGB16_Blitter::blitMask(const SkMask& mask, 623 const SkIRect& clip) { 624 if (mask.fFormat == SkMask::kBW_Format) { 625 SkRGB16_BlendBW(fDevice, mask, clip, 256 - fScale, fColor16); 626 return; 627 } 628 629 uint16_t* SK_RESTRICT device = fDevice.getAddr16(clip.fLeft, clip.fTop); 630 const uint8_t* SK_RESTRICT alpha = mask.getAddr8(clip.fLeft, clip.fTop); 631 int width = clip.width(); 632 int height = clip.height(); 633 size_t deviceRB = fDevice.rowBytes() - (width << 1); 634 unsigned maskRB = mask.fRowBytes - width; 635 uint32_t color32 = fExpandedRaw16; 636 637 unsigned scale256 = fScale; 638 do { 639 int w = width; 640 do { 641 unsigned aa = *alpha++; 642 unsigned scale = SkAlpha255To256(aa) * scale256 >> (8 + 3); 643 uint32_t src32 = color32 * scale; 644 uint32_t dst32 = SkExpand_rgb_16(*device) * (32 - scale); 645 *device++ = SkCompact_rgb_16((src32 + dst32) >> 5); 646 } while (--w != 0); 647 device = (uint16_t*)((char*)device + deviceRB); 648 alpha += maskRB; 649 } while (--height != 0); 650} 651 652void SkRGB16_Blitter::blitV(int x, int y, int height, SkAlpha alpha) { 653 uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); 654 size_t deviceRB = fDevice.rowBytes(); 655 656 // TODO: respect fDoDither 657 unsigned scale5 = SkAlpha255To256(alpha) * fScale >> (8 + 3); 658 uint32_t src32 = fExpandedRaw16 * scale5; 659 scale5 = 32 - scale5; 660 do { 661 uint32_t dst32 = SkExpand_rgb_16(*device) * scale5; 662 *device = SkCompact_rgb_16((src32 + dst32) >> 5); 663 device = (uint16_t*)((char*)device + deviceRB); 664 } while (--height != 0); 665} 666 667void SkRGB16_Blitter::blitRect(int x, int y, int width, int height) { 668 SkASSERT(x + width <= fDevice.width() && y + height <= fDevice.height()); 669 uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); 670 size_t deviceRB = fDevice.rowBytes(); 671 SkPMColor src32 = fSrcColor32; 672 673 while (--height >= 0) { 674 blend32_16_row(src32, device, width); 675 device = (uint16_t*)((char*)device + deviceRB); 676 } 677} 678 679/////////////////////////////////////////////////////////////////////////////// 680 681SkRGB16_Shader16_Blitter::SkRGB16_Shader16_Blitter(const SkBitmap& device, 682 const SkPaint& paint) 683 : SkRGB16_Shader_Blitter(device, paint) { 684 SkASSERT(SkShader::CanCallShadeSpan16(fShaderFlags)); 685} 686 687void SkRGB16_Shader16_Blitter::blitH(int x, int y, int width) { 688 SkASSERT(x + width <= fDevice.width()); 689 690 uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); 691 SkShader* shader = fShader; 692 693 int alpha = shader->getSpan16Alpha(); 694 if (0xFF == alpha) { 695 shader->shadeSpan16(x, y, device, width); 696 } else { 697 uint16_t* span16 = (uint16_t*)fBuffer; 698 shader->shadeSpan16(x, y, span16, width); 699 SkBlendRGB16(span16, device, SkAlpha255To256(alpha), width); 700 } 701} 702 703void SkRGB16_Shader16_Blitter::blitRect(int x, int y, int width, int height) { 704 SkShader* shader = fShader; 705 uint16_t* dst = fDevice.getAddr16(x, y); 706 size_t dstRB = fDevice.rowBytes(); 707 int alpha = shader->getSpan16Alpha(); 708 709 if (0xFF == alpha) { 710 if (fShaderFlags & SkShader::kConstInY16_Flag) { 711 // have the shader blit directly into the device the first time 712 shader->shadeSpan16(x, y, dst, width); 713 // and now just memcpy that line on the subsequent lines 714 if (--height > 0) { 715 const uint16_t* orig = dst; 716 do { 717 dst = (uint16_t*)((char*)dst + dstRB); 718 memcpy(dst, orig, width << 1); 719 } while (--height); 720 } 721 } else { // need to call shadeSpan16 for every line 722 do { 723 shader->shadeSpan16(x, y, dst, width); 724 y += 1; 725 dst = (uint16_t*)((char*)dst + dstRB); 726 } while (--height); 727 } 728 } else { 729 int scale = SkAlpha255To256(alpha); 730 uint16_t* span16 = (uint16_t*)fBuffer; 731 if (fShaderFlags & SkShader::kConstInY16_Flag) { 732 shader->shadeSpan16(x, y, span16, width); 733 do { 734 SkBlendRGB16(span16, dst, scale, width); 735 dst = (uint16_t*)((char*)dst + dstRB); 736 } while (--height); 737 } else { 738 do { 739 shader->shadeSpan16(x, y, span16, width); 740 SkBlendRGB16(span16, dst, scale, width); 741 y += 1; 742 dst = (uint16_t*)((char*)dst + dstRB); 743 } while (--height); 744 } 745 } 746} 747 748void SkRGB16_Shader16_Blitter::blitAntiH(int x, int y, 749 const SkAlpha* SK_RESTRICT antialias, 750 const int16_t* SK_RESTRICT runs) { 751 SkShader* shader = fShader; 752 SkPMColor* SK_RESTRICT span = fBuffer; 753 uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); 754 755 int alpha = shader->getSpan16Alpha(); 756 uint16_t* span16 = (uint16_t*)span; 757 758 if (0xFF == alpha) { 759 for (;;) { 760 int count = *runs; 761 if (count <= 0) { 762 break; 763 } 764 SkASSERT(count <= fDevice.width()); // don't overrun fBuffer 765 766 int aa = *antialias; 767 if (aa == 255) { 768 // go direct to the device! 769 shader->shadeSpan16(x, y, device, count); 770 } else if (aa) { 771 shader->shadeSpan16(x, y, span16, count); 772 SkBlendRGB16(span16, device, SkAlpha255To256(aa), count); 773 } 774 device += count; 775 runs += count; 776 antialias += count; 777 x += count; 778 } 779 } else { // span alpha is < 255 780 alpha = SkAlpha255To256(alpha); 781 for (;;) { 782 int count = *runs; 783 if (count <= 0) { 784 break; 785 } 786 SkASSERT(count <= fDevice.width()); // don't overrun fBuffer 787 788 int aa = SkAlphaMul(*antialias, alpha); 789 if (aa) { 790 shader->shadeSpan16(x, y, span16, count); 791 SkBlendRGB16(span16, device, SkAlpha255To256(aa), count); 792 } 793 794 device += count; 795 runs += count; 796 antialias += count; 797 x += count; 798 } 799 } 800} 801 802/////////////////////////////////////////////////////////////////////////////// 803 804SkRGB16_Shader_Blitter::SkRGB16_Shader_Blitter(const SkBitmap& device, 805 const SkPaint& paint) 806: INHERITED(device, paint) { 807 SkASSERT(paint.getXfermode() == NULL); 808 809 fBuffer = (SkPMColor*)sk_malloc_throw(device.width() * sizeof(SkPMColor)); 810 811 // compute SkBlitRow::Procs 812 unsigned flags = 0; 813 814 uint32_t shaderFlags = fShaderFlags; 815 // shaders take care of global alpha, so we never set it in SkBlitRow 816 if (!(shaderFlags & SkShader::kOpaqueAlpha_Flag)) { 817 flags |= SkBlitRow::kSrcPixelAlpha_Flag; 818 } 819 // don't dither if the shader is really 16bit 820 if (paint.isDither() && !(shaderFlags & SkShader::kIntrinsicly16_Flag)) { 821 flags |= SkBlitRow::kDither_Flag; 822 } 823 // used when we know our global alpha is 0xFF 824 fOpaqueProc = SkBlitRow::Factory(flags, SkBitmap::kRGB_565_Config); 825 // used when we know our global alpha is < 0xFF 826 fAlphaProc = SkBlitRow::Factory(flags | SkBlitRow::kGlobalAlpha_Flag, 827 SkBitmap::kRGB_565_Config); 828} 829 830SkRGB16_Shader_Blitter::~SkRGB16_Shader_Blitter() { 831 sk_free(fBuffer); 832} 833 834void SkRGB16_Shader_Blitter::blitH(int x, int y, int width) { 835 SkASSERT(x + width <= fDevice.width()); 836 837 fShader->shadeSpan(x, y, fBuffer, width); 838 // shaders take care of global alpha, so we pass 0xFF (should be ignored) 839 fOpaqueProc(fDevice.getAddr16(x, y), fBuffer, width, 0xFF, x, y); 840} 841 842void SkRGB16_Shader_Blitter::blitRect(int x, int y, int width, int height) { 843 SkShader* shader = fShader; 844 SkBlitRow::Proc proc = fOpaqueProc; 845 SkPMColor* buffer = fBuffer; 846 uint16_t* dst = fDevice.getAddr16(x, y); 847 size_t dstRB = fDevice.rowBytes(); 848 849 if (fShaderFlags & SkShader::kConstInY32_Flag) { 850 shader->shadeSpan(x, y, buffer, width); 851 do { 852 proc(dst, buffer, width, 0xFF, x, y); 853 y += 1; 854 dst = (uint16_t*)((char*)dst + dstRB); 855 } while (--height); 856 } else { 857 do { 858 shader->shadeSpan(x, y, buffer, width); 859 proc(dst, buffer, width, 0xFF, x, y); 860 y += 1; 861 dst = (uint16_t*)((char*)dst + dstRB); 862 } while (--height); 863 } 864} 865 866static inline int count_nonzero_span(const int16_t runs[], const SkAlpha aa[]) { 867 int count = 0; 868 for (;;) { 869 int n = *runs; 870 if (n == 0 || *aa == 0) { 871 break; 872 } 873 runs += n; 874 aa += n; 875 count += n; 876 } 877 return count; 878} 879 880void SkRGB16_Shader_Blitter::blitAntiH(int x, int y, 881 const SkAlpha* SK_RESTRICT antialias, 882 const int16_t* SK_RESTRICT runs) { 883 SkShader* shader = fShader; 884 SkPMColor* SK_RESTRICT span = fBuffer; 885 uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); 886 887 for (;;) { 888 int count = *runs; 889 if (count <= 0) { 890 break; 891 } 892 int aa = *antialias; 893 if (0 == aa) { 894 device += count; 895 runs += count; 896 antialias += count; 897 x += count; 898 continue; 899 } 900 901 int nonZeroCount = count + count_nonzero_span(runs + count, antialias + count); 902 903 SkASSERT(nonZeroCount <= fDevice.width()); // don't overrun fBuffer 904 shader->shadeSpan(x, y, span, nonZeroCount); 905 906 SkPMColor* localSpan = span; 907 for (;;) { 908 SkBlitRow::Proc proc = (aa == 0xFF) ? fOpaqueProc : fAlphaProc; 909 proc(device, localSpan, count, aa, x, y); 910 911 x += count; 912 device += count; 913 runs += count; 914 antialias += count; 915 nonZeroCount -= count; 916 if (nonZeroCount == 0) { 917 break; 918 } 919 localSpan += count; 920 SkASSERT(nonZeroCount > 0); 921 count = *runs; 922 SkASSERT(count > 0); 923 aa = *antialias; 924 } 925 } 926} 927 928/////////////////////////////////////////////////////////////////////// 929 930SkRGB16_Shader_Xfermode_Blitter::SkRGB16_Shader_Xfermode_Blitter( 931 const SkBitmap& device, const SkPaint& paint) 932: INHERITED(device, paint) { 933 fXfermode = paint.getXfermode(); 934 SkASSERT(fXfermode); 935 fXfermode->ref(); 936 937 int width = device.width(); 938 fBuffer = (SkPMColor*)sk_malloc_throw((width + (SkAlign4(width) >> 2)) * sizeof(SkPMColor)); 939 fAAExpand = (uint8_t*)(fBuffer + width); 940} 941 942SkRGB16_Shader_Xfermode_Blitter::~SkRGB16_Shader_Xfermode_Blitter() { 943 fXfermode->unref(); 944 sk_free(fBuffer); 945} 946 947void SkRGB16_Shader_Xfermode_Blitter::blitH(int x, int y, int width) { 948 SkASSERT(x + width <= fDevice.width()); 949 950 uint16_t* device = fDevice.getAddr16(x, y); 951 SkPMColor* span = fBuffer; 952 953 fShader->shadeSpan(x, y, span, width); 954 fXfermode->xfer16(device, span, width, NULL); 955} 956 957void SkRGB16_Shader_Xfermode_Blitter::blitAntiH(int x, int y, 958 const SkAlpha* SK_RESTRICT antialias, 959 const int16_t* SK_RESTRICT runs) { 960 SkShader* shader = fShader; 961 SkXfermode* mode = fXfermode; 962 SkPMColor* SK_RESTRICT span = fBuffer; 963 uint8_t* SK_RESTRICT aaExpand = fAAExpand; 964 uint16_t* SK_RESTRICT device = fDevice.getAddr16(x, y); 965 966 for (;;) { 967 int count = *runs; 968 if (count <= 0) { 969 break; 970 } 971 int aa = *antialias; 972 if (0 == aa) { 973 device += count; 974 runs += count; 975 antialias += count; 976 x += count; 977 continue; 978 } 979 980 int nonZeroCount = count + count_nonzero_span(runs + count, 981 antialias + count); 982 983 SkASSERT(nonZeroCount <= fDevice.width()); // don't overrun fBuffer 984 shader->shadeSpan(x, y, span, nonZeroCount); 985 986 x += nonZeroCount; 987 SkPMColor* localSpan = span; 988 for (;;) { 989 if (aa == 0xFF) { 990 mode->xfer16(device, localSpan, count, NULL); 991 } else { 992 SkASSERT(aa); 993 memset(aaExpand, aa, count); 994 mode->xfer16(device, localSpan, count, aaExpand); 995 } 996 device += count; 997 runs += count; 998 antialias += count; 999 nonZeroCount -= count; 1000 if (nonZeroCount == 0) { 1001 break; 1002 } 1003 localSpan += count; 1004 SkASSERT(nonZeroCount > 0); 1005 count = *runs; 1006 SkASSERT(count > 0); 1007 aa = *antialias; 1008 } 1009 } 1010} 1011 1012/////////////////////////////////////////////////////////////////////////////// 1013 1014SkBlitter* SkBlitter_ChooseD565(const SkBitmap& device, const SkPaint& paint, 1015 SkTBlitterAllocator* allocator) { 1016 SkASSERT(allocator != NULL); 1017 1018 SkBlitter* blitter; 1019 SkShader* shader = paint.getShader(); 1020 SkXfermode* mode = paint.getXfermode(); 1021 1022 // we require a shader if there is an xfermode, handled by our caller 1023 SkASSERT(NULL == mode || NULL != shader); 1024 1025 if (shader) { 1026 if (mode) { 1027 blitter = allocator->createT<SkRGB16_Shader_Xfermode_Blitter>(device, paint); 1028 } else if (shader->canCallShadeSpan16()) { 1029 blitter = allocator->createT<SkRGB16_Shader16_Blitter>(device, paint); 1030 } else { 1031 blitter = allocator->createT<SkRGB16_Shader_Blitter>(device, paint); 1032 } 1033 } else { 1034 // no shader, no xfermode, (and we always ignore colorfilter) 1035 SkColor color = paint.getColor(); 1036 if (0 == SkColorGetA(color)) { 1037 blitter = allocator->createT<SkNullBlitter>(); 1038#ifdef USE_BLACK_BLITTER 1039 } else if (SK_ColorBLACK == color) { 1040 blitter = allocator->createT<SkRGB16_Black_Blitter>(device, paint); 1041#endif 1042 } else if (0xFF == SkColorGetA(color)) { 1043 blitter = allocator->createT<SkRGB16_Opaque_Blitter>(device, paint); 1044 } else { 1045 blitter = allocator->createT<SkRGB16_Blitter>(device, paint); 1046 } 1047 } 1048 1049 return blitter; 1050} 1051