reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1 | /* libs/graphics/sgl/SkBlitter.cpp |
| 2 | ** |
| 3 | ** Copyright 2006, The Android Open Source Project |
| 4 | ** |
| 5 | ** Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | ** you may not use this file except in compliance with the License. |
| 7 | ** You may obtain a copy of the License at |
| 8 | ** |
| 9 | ** http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | ** |
| 11 | ** Unless required by applicable law or agreed to in writing, software |
| 12 | ** distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | ** See the License for the specific language governing permissions and |
| 15 | ** limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | #include "SkBlitter.h" |
| 19 | #include "SkAntiRun.h" |
| 20 | #include "SkColor.h" |
| 21 | #include "SkColorFilter.h" |
| 22 | #include "SkMask.h" |
| 23 | #include "SkMaskFilter.h" |
| 24 | #include "SkTemplatesPriv.h" |
| 25 | #include "SkUtils.h" |
| 26 | #include "SkXfermode.h" |
| 27 | |
reed@android.com | 845fdac | 2009-06-23 03:01:32 +0000 | [diff] [blame] | 28 | SkBlitter::~SkBlitter() {} |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 29 | |
| 30 | const SkBitmap* SkBlitter::justAnOpaqueColor(uint32_t* value) |
| 31 | { |
| 32 | return NULL; |
| 33 | } |
| 34 | |
| 35 | void SkBlitter::blitH(int x, int y, int width) |
| 36 | { |
| 37 | SkASSERT(!"unimplemented"); |
| 38 | } |
| 39 | |
| 40 | void SkBlitter::blitAntiH(int x, int y, const SkAlpha antialias[], const int16_t runs[]) |
| 41 | { |
| 42 | SkASSERT(!"unimplemented"); |
| 43 | } |
| 44 | |
| 45 | void SkBlitter::blitV(int x, int y, int height, SkAlpha alpha) |
| 46 | { |
| 47 | if (alpha == 255) |
| 48 | this->blitRect(x, y, 1, height); |
| 49 | else |
| 50 | { |
| 51 | int16_t runs[2]; |
| 52 | runs[0] = 1; |
| 53 | runs[1] = 0; |
| 54 | |
| 55 | while (--height >= 0) |
| 56 | this->blitAntiH(x, y++, &alpha, runs); |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | void SkBlitter::blitRect(int x, int y, int width, int height) |
| 61 | { |
| 62 | while (--height >= 0) |
| 63 | this->blitH(x, y++, width); |
| 64 | } |
| 65 | |
| 66 | ////////////////////////////////////////////////////////////////////////////// |
| 67 | |
| 68 | static inline void bits_to_runs(SkBlitter* blitter, int x, int y, const uint8_t bits[], |
| 69 | U8CPU left_mask, int rowBytes, U8CPU right_mask) |
| 70 | { |
| 71 | int inFill = 0; |
| 72 | int pos = 0; |
| 73 | |
| 74 | while (--rowBytes >= 0) |
| 75 | { |
| 76 | unsigned b = *bits++ & left_mask; |
| 77 | if (rowBytes == 0) |
| 78 | b &= right_mask; |
| 79 | |
| 80 | for (unsigned test = 0x80; test != 0; test >>= 1) |
| 81 | { |
| 82 | if (b & test) |
| 83 | { |
| 84 | if (!inFill) |
| 85 | { |
| 86 | pos = x; |
| 87 | inFill = true; |
| 88 | } |
| 89 | } |
| 90 | else |
| 91 | { |
| 92 | if (inFill) |
| 93 | { |
| 94 | blitter->blitH(pos, y, x - pos); |
| 95 | inFill = false; |
| 96 | } |
| 97 | } |
| 98 | x += 1; |
| 99 | } |
| 100 | left_mask = 0xFF; |
| 101 | } |
| 102 | |
| 103 | // final cleanup |
| 104 | if (inFill) |
| 105 | blitter->blitH(pos, y, x - pos); |
| 106 | } |
| 107 | |
| 108 | void SkBlitter::blitMask(const SkMask& mask, const SkIRect& clip) |
| 109 | { |
| 110 | SkASSERT(mask.fBounds.contains(clip)); |
| 111 | |
| 112 | if (mask.fFormat == SkMask::kBW_Format) |
| 113 | { |
| 114 | int cx = clip.fLeft; |
| 115 | int cy = clip.fTop; |
| 116 | int maskLeft = mask.fBounds.fLeft; |
| 117 | int mask_rowBytes = mask.fRowBytes; |
| 118 | int height = clip.height(); |
| 119 | |
| 120 | const uint8_t* bits = mask.getAddr1(cx, cy); |
| 121 | |
| 122 | if (cx == maskLeft && clip.fRight == mask.fBounds.fRight) |
| 123 | { |
| 124 | while (--height >= 0) |
| 125 | { |
| 126 | bits_to_runs(this, cx, cy, bits, 0xFF, mask_rowBytes, 0xFF); |
| 127 | bits += mask_rowBytes; |
| 128 | cy += 1; |
| 129 | } |
| 130 | } |
| 131 | else |
| 132 | { |
| 133 | int left_edge = cx - maskLeft; |
| 134 | SkASSERT(left_edge >= 0); |
| 135 | int rite_edge = clip.fRight - maskLeft; |
| 136 | SkASSERT(rite_edge > left_edge); |
| 137 | |
| 138 | int left_mask = 0xFF >> (left_edge & 7); |
| 139 | int rite_mask = 0xFF << (8 - (rite_edge & 7)); |
| 140 | int full_runs = (rite_edge >> 3) - ((left_edge + 7) >> 3); |
| 141 | |
| 142 | // check for empty right mask, so we don't read off the end (or go slower than we need to) |
| 143 | if (rite_mask == 0) |
| 144 | { |
| 145 | SkASSERT(full_runs >= 0); |
| 146 | full_runs -= 1; |
| 147 | rite_mask = 0xFF; |
| 148 | } |
| 149 | if (left_mask == 0xFF) |
| 150 | full_runs -= 1; |
| 151 | |
| 152 | // back up manually so we can keep in sync with our byte-aligned src |
| 153 | // have cx reflect our actual starting x-coord |
| 154 | cx -= left_edge & 7; |
| 155 | |
| 156 | if (full_runs < 0) |
| 157 | { |
| 158 | SkASSERT((left_mask & rite_mask) != 0); |
| 159 | while (--height >= 0) |
| 160 | { |
| 161 | bits_to_runs(this, cx, cy, bits, left_mask, 1, rite_mask); |
| 162 | bits += mask_rowBytes; |
| 163 | cy += 1; |
| 164 | } |
| 165 | } |
| 166 | else |
| 167 | { |
| 168 | while (--height >= 0) |
| 169 | { |
| 170 | bits_to_runs(this, cx, cy, bits, left_mask, full_runs + 2, rite_mask); |
| 171 | bits += mask_rowBytes; |
| 172 | cy += 1; |
| 173 | } |
| 174 | } |
| 175 | } |
| 176 | } |
| 177 | else |
| 178 | { |
| 179 | int width = clip.width(); |
| 180 | SkAutoSTMalloc<64, int16_t> runStorage(width + 1); |
| 181 | int16_t* runs = runStorage.get(); |
| 182 | const uint8_t* aa = mask.getAddr(clip.fLeft, clip.fTop); |
| 183 | |
| 184 | sk_memset16((uint16_t*)runs, 1, width); |
| 185 | runs[width] = 0; |
| 186 | |
| 187 | int height = clip.height(); |
| 188 | int y = clip.fTop; |
| 189 | while (--height >= 0) |
| 190 | { |
| 191 | this->blitAntiH(clip.fLeft, y, aa, runs); |
| 192 | aa += mask.fRowBytes; |
| 193 | y += 1; |
| 194 | } |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | /////////////////////// these guys are not virtual, just a helpers |
| 199 | |
| 200 | void SkBlitter::blitMaskRegion(const SkMask& mask, const SkRegion& clip) { |
| 201 | if (clip.quickReject(mask.fBounds)) { |
| 202 | return; |
| 203 | } |
| 204 | |
| 205 | SkRegion::Cliperator clipper(clip, mask.fBounds); |
| 206 | |
| 207 | while (!clipper.done()) { |
| 208 | const SkIRect& cr = clipper.rect(); |
| 209 | this->blitMask(mask, cr); |
| 210 | clipper.next(); |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | void SkBlitter::blitRectRegion(const SkIRect& rect, const SkRegion& clip) { |
| 215 | SkRegion::Cliperator clipper(clip, rect); |
| 216 | |
| 217 | while (!clipper.done()) { |
| 218 | const SkIRect& cr = clipper.rect(); |
| 219 | this->blitRect(cr.fLeft, cr.fTop, cr.width(), cr.height()); |
| 220 | clipper.next(); |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | void SkBlitter::blitRegion(const SkRegion& clip) { |
| 225 | SkRegion::Iterator iter(clip); |
| 226 | |
| 227 | while (!iter.done()) { |
| 228 | const SkIRect& cr = iter.rect(); |
| 229 | this->blitRect(cr.fLeft, cr.fTop, cr.width(), cr.height()); |
| 230 | iter.next(); |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | /////////////////////////////////////////////////////////////////////////////////////// |
| 235 | /////////////////////////////////////////////////////////////////////////////////////// |
| 236 | |
| 237 | void SkNullBlitter::blitH(int x, int y, int width) |
| 238 | { |
| 239 | } |
| 240 | |
| 241 | void SkNullBlitter::blitAntiH(int x, int y, const SkAlpha antialias[], const int16_t runs[]) |
| 242 | { |
| 243 | } |
| 244 | |
| 245 | void SkNullBlitter::blitV(int x, int y, int height, SkAlpha alpha) |
| 246 | { |
| 247 | } |
| 248 | |
| 249 | void SkNullBlitter::blitRect(int x, int y, int width, int height) |
| 250 | { |
| 251 | } |
| 252 | |
| 253 | void SkNullBlitter::blitMask(const SkMask& mask, const SkIRect& clip) |
| 254 | { |
| 255 | } |
| 256 | |
| 257 | const SkBitmap* SkNullBlitter::justAnOpaqueColor(uint32_t* value) |
| 258 | { |
| 259 | return NULL; |
| 260 | } |
| 261 | |
| 262 | /////////////////////////////////////////////////////////////////////////////////////// |
| 263 | /////////////////////////////////////////////////////////////////////////////////////// |
| 264 | |
| 265 | static int compute_anti_width(const int16_t runs[]) |
| 266 | { |
| 267 | int width = 0; |
| 268 | |
| 269 | for (;;) |
| 270 | { |
| 271 | int count = runs[0]; |
| 272 | |
| 273 | SkASSERT(count >= 0); |
| 274 | if (count == 0) |
| 275 | break; |
| 276 | width += count; |
| 277 | runs += count; |
| 278 | |
| 279 | SkASSERT(width < 20000); |
| 280 | } |
| 281 | return width; |
| 282 | } |
| 283 | |
| 284 | static inline bool y_in_rect(int y, const SkIRect& rect) |
| 285 | { |
| 286 | return (unsigned)(y - rect.fTop) < (unsigned)rect.height(); |
| 287 | } |
| 288 | |
| 289 | static inline bool x_in_rect(int x, const SkIRect& rect) |
| 290 | { |
| 291 | return (unsigned)(x - rect.fLeft) < (unsigned)rect.width(); |
| 292 | } |
| 293 | |
| 294 | void SkRectClipBlitter::blitH(int left, int y, int width) |
| 295 | { |
| 296 | SkASSERT(width > 0); |
| 297 | |
| 298 | if (!y_in_rect(y, fClipRect)) |
| 299 | return; |
| 300 | |
| 301 | int right = left + width; |
| 302 | |
| 303 | if (left < fClipRect.fLeft) |
| 304 | left = fClipRect.fLeft; |
| 305 | if (right > fClipRect.fRight) |
| 306 | right = fClipRect.fRight; |
| 307 | |
| 308 | width = right - left; |
| 309 | if (width > 0) |
| 310 | fBlitter->blitH(left, y, width); |
| 311 | } |
| 312 | |
| 313 | void SkRectClipBlitter::blitAntiH(int left, int y, const SkAlpha aa[], const int16_t runs[]) |
| 314 | { |
| 315 | if (!y_in_rect(y, fClipRect) || left >= fClipRect.fRight) |
| 316 | return; |
| 317 | |
| 318 | int x0 = left; |
| 319 | int x1 = left + compute_anti_width(runs); |
| 320 | |
| 321 | if (x1 <= fClipRect.fLeft) |
| 322 | return; |
| 323 | |
| 324 | SkASSERT(x0 < x1); |
| 325 | if (x0 < fClipRect.fLeft) |
| 326 | { |
| 327 | int dx = fClipRect.fLeft - x0; |
| 328 | SkAlphaRuns::BreakAt((int16_t*)runs, (uint8_t*)aa, dx); |
| 329 | runs += dx; |
| 330 | aa += dx; |
| 331 | x0 = fClipRect.fLeft; |
| 332 | } |
| 333 | |
| 334 | SkASSERT(x0 < x1 && runs[x1 - x0] == 0); |
| 335 | if (x1 > fClipRect.fRight) |
| 336 | { |
| 337 | x1 = fClipRect.fRight; |
| 338 | SkAlphaRuns::BreakAt((int16_t*)runs, (uint8_t*)aa, x1 - x0); |
| 339 | ((int16_t*)runs)[x1 - x0] = 0; |
| 340 | } |
| 341 | |
| 342 | SkASSERT(x0 < x1 && runs[x1 - x0] == 0); |
| 343 | SkASSERT(compute_anti_width(runs) == x1 - x0); |
| 344 | |
| 345 | fBlitter->blitAntiH(x0, y, aa, runs); |
| 346 | } |
| 347 | |
| 348 | void SkRectClipBlitter::blitV(int x, int y, int height, SkAlpha alpha) |
| 349 | { |
| 350 | SkASSERT(height > 0); |
| 351 | |
| 352 | if (!x_in_rect(x, fClipRect)) |
| 353 | return; |
| 354 | |
| 355 | int y0 = y; |
| 356 | int y1 = y + height; |
| 357 | |
| 358 | if (y0 < fClipRect.fTop) |
| 359 | y0 = fClipRect.fTop; |
| 360 | if (y1 > fClipRect.fBottom) |
| 361 | y1 = fClipRect.fBottom; |
| 362 | |
| 363 | if (y0 < y1) |
| 364 | fBlitter->blitV(x, y0, y1 - y0, alpha); |
| 365 | } |
| 366 | |
| 367 | void SkRectClipBlitter::blitRect(int left, int y, int width, int height) |
| 368 | { |
| 369 | SkIRect r; |
| 370 | |
| 371 | r.set(left, y, left + width, y + height); |
| 372 | if (r.intersect(fClipRect)) |
| 373 | fBlitter->blitRect(r.fLeft, r.fTop, r.width(), r.height()); |
| 374 | } |
| 375 | |
| 376 | void SkRectClipBlitter::blitMask(const SkMask& mask, const SkIRect& clip) |
| 377 | { |
| 378 | SkASSERT(mask.fBounds.contains(clip)); |
| 379 | |
| 380 | SkIRect r = clip; |
| 381 | |
| 382 | if (r.intersect(fClipRect)) |
| 383 | fBlitter->blitMask(mask, r); |
| 384 | } |
| 385 | |
| 386 | const SkBitmap* SkRectClipBlitter::justAnOpaqueColor(uint32_t* value) |
| 387 | { |
| 388 | return fBlitter->justAnOpaqueColor(value); |
| 389 | } |
| 390 | |
| 391 | /////////////////////////////////////////////////////////////////////////////////////// |
| 392 | /////////////////////////////////////////////////////////////////////////////////////// |
| 393 | |
| 394 | void SkRgnClipBlitter::blitH(int x, int y, int width) |
| 395 | { |
| 396 | SkRegion::Spanerator span(*fRgn, y, x, x + width); |
| 397 | int left, right; |
| 398 | |
| 399 | while (span.next(&left, &right)) |
| 400 | { |
| 401 | SkASSERT(left < right); |
| 402 | fBlitter->blitH(left, y, right - left); |
| 403 | } |
| 404 | } |
| 405 | |
| 406 | void SkRgnClipBlitter::blitAntiH(int x, int y, const SkAlpha aa[], const int16_t runs[]) |
| 407 | { |
| 408 | int width = compute_anti_width(runs); |
| 409 | SkRegion::Spanerator span(*fRgn, y, x, x + width); |
| 410 | int left, right; |
| 411 | SkDEBUGCODE(const SkIRect& bounds = fRgn->getBounds();) |
| 412 | |
| 413 | int prevRite = x; |
| 414 | while (span.next(&left, &right)) |
| 415 | { |
| 416 | SkASSERT(x <= left); |
| 417 | SkASSERT(left < right); |
| 418 | SkASSERT(left >= bounds.fLeft && right <= bounds.fRight); |
| 419 | |
| 420 | SkAlphaRuns::Break((int16_t*)runs, (uint8_t*)aa, left - x, right - left); |
| 421 | |
| 422 | // now zero before left |
| 423 | if (left > prevRite) |
| 424 | { |
| 425 | int index = prevRite - x; |
| 426 | ((uint8_t*)aa)[index] = 0; // skip runs after right |
| 427 | ((int16_t*)runs)[index] = SkToS16(left - prevRite); |
| 428 | } |
| 429 | |
| 430 | prevRite = right; |
| 431 | } |
| 432 | |
| 433 | if (prevRite > x) |
| 434 | { |
| 435 | ((int16_t*)runs)[prevRite - x] = 0; |
| 436 | |
| 437 | if (x < 0) { |
| 438 | int skip = runs[0]; |
| 439 | SkASSERT(skip >= -x); |
| 440 | aa += skip; |
| 441 | runs += skip; |
| 442 | x += skip; |
| 443 | } |
| 444 | fBlitter->blitAntiH(x, y, aa, runs); |
| 445 | } |
| 446 | } |
| 447 | |
| 448 | void SkRgnClipBlitter::blitV(int x, int y, int height, SkAlpha alpha) |
| 449 | { |
| 450 | SkIRect bounds; |
| 451 | bounds.set(x, y, x + 1, y + height); |
| 452 | |
| 453 | SkRegion::Cliperator iter(*fRgn, bounds); |
| 454 | |
| 455 | while (!iter.done()) |
| 456 | { |
| 457 | const SkIRect& r = iter.rect(); |
| 458 | SkASSERT(bounds.contains(r)); |
| 459 | |
| 460 | fBlitter->blitV(x, r.fTop, r.height(), alpha); |
| 461 | iter.next(); |
| 462 | } |
| 463 | } |
| 464 | |
| 465 | void SkRgnClipBlitter::blitRect(int x, int y, int width, int height) |
| 466 | { |
| 467 | SkIRect bounds; |
| 468 | bounds.set(x, y, x + width, y + height); |
| 469 | |
| 470 | SkRegion::Cliperator iter(*fRgn, bounds); |
| 471 | |
| 472 | while (!iter.done()) |
| 473 | { |
| 474 | const SkIRect& r = iter.rect(); |
| 475 | SkASSERT(bounds.contains(r)); |
| 476 | |
| 477 | fBlitter->blitRect(r.fLeft, r.fTop, r.width(), r.height()); |
| 478 | iter.next(); |
| 479 | } |
| 480 | } |
| 481 | |
| 482 | void SkRgnClipBlitter::blitMask(const SkMask& mask, const SkIRect& clip) |
| 483 | { |
| 484 | SkASSERT(mask.fBounds.contains(clip)); |
| 485 | |
| 486 | SkRegion::Cliperator iter(*fRgn, clip); |
| 487 | const SkIRect& r = iter.rect(); |
| 488 | SkBlitter* blitter = fBlitter; |
| 489 | |
| 490 | while (!iter.done()) |
| 491 | { |
| 492 | blitter->blitMask(mask, r); |
| 493 | iter.next(); |
| 494 | } |
| 495 | } |
| 496 | |
| 497 | const SkBitmap* SkRgnClipBlitter::justAnOpaqueColor(uint32_t* value) |
| 498 | { |
| 499 | return fBlitter->justAnOpaqueColor(value); |
| 500 | } |
| 501 | |
| 502 | /////////////////////////////////////////////////////////////////////////////////////// |
| 503 | /////////////////////////////////////////////////////////////////////////////////////// |
| 504 | |
| 505 | SkBlitter* SkBlitterClipper::apply(SkBlitter* blitter, const SkRegion* clip, const SkIRect* ir) |
| 506 | { |
| 507 | if (clip) |
| 508 | { |
| 509 | const SkIRect& clipR = clip->getBounds(); |
| 510 | |
| 511 | if (clip->isEmpty() || (ir && !SkIRect::Intersects(clipR, *ir))) |
| 512 | blitter = &fNullBlitter; |
| 513 | else if (clip->isRect()) |
| 514 | { |
| 515 | if (ir == NULL || !clipR.contains(*ir)) |
| 516 | { |
| 517 | fRectBlitter.init(blitter, clipR); |
| 518 | blitter = &fRectBlitter; |
| 519 | } |
| 520 | } |
| 521 | else |
| 522 | { |
| 523 | fRgnBlitter.init(blitter, clip); |
| 524 | blitter = &fRgnBlitter; |
| 525 | } |
| 526 | } |
| 527 | return blitter; |
| 528 | } |
| 529 | |
| 530 | /////////////////////////////////////////////////////////////////////////////////////// |
| 531 | /////////////////////////////////////////////////////////////////////////////////////// |
| 532 | |
| 533 | #include "SkColorShader.h" |
| 534 | #include "SkColorPriv.h" |
| 535 | |
| 536 | class Sk3DShader : public SkShader { |
| 537 | public: |
| 538 | Sk3DShader(SkShader* proxy) : fProxy(proxy) |
| 539 | { |
| 540 | proxy->safeRef(); |
| 541 | fMask = NULL; |
| 542 | } |
| 543 | virtual ~Sk3DShader() |
| 544 | { |
| 545 | fProxy->safeUnref(); |
| 546 | } |
| 547 | void setMask(const SkMask* mask) { fMask = mask; } |
| 548 | |
| 549 | virtual bool setContext(const SkBitmap& device, const SkPaint& paint, const SkMatrix& matrix) |
| 550 | { |
| 551 | if (fProxy) |
| 552 | return fProxy->setContext(device, paint, matrix); |
| 553 | else |
| 554 | { |
| 555 | fPMColor = SkPreMultiplyColor(paint.getColor()); |
| 556 | return this->INHERITED::setContext(device, paint, matrix); |
| 557 | } |
| 558 | } |
| 559 | virtual void shadeSpan(int x, int y, SkPMColor span[], int count) |
| 560 | { |
| 561 | if (fProxy) |
| 562 | fProxy->shadeSpan(x, y, span, count); |
| 563 | |
| 564 | if (fMask == NULL) |
| 565 | { |
| 566 | if (fProxy == NULL) |
| 567 | sk_memset32(span, fPMColor, count); |
| 568 | return; |
| 569 | } |
| 570 | |
| 571 | SkASSERT(fMask->fBounds.contains(x, y)); |
| 572 | SkASSERT(fMask->fBounds.contains(x + count - 1, y)); |
| 573 | |
| 574 | size_t size = fMask->computeImageSize(); |
| 575 | const uint8_t* alpha = fMask->getAddr(x, y); |
| 576 | const uint8_t* mulp = alpha + size; |
| 577 | const uint8_t* addp = mulp + size; |
| 578 | |
| 579 | if (fProxy) |
| 580 | { |
| 581 | for (int i = 0; i < count; i++) |
| 582 | { |
| 583 | if (alpha[i]) |
| 584 | { |
| 585 | SkPMColor c = span[i]; |
| 586 | if (c) |
| 587 | { |
| 588 | unsigned a = SkGetPackedA32(c); |
| 589 | unsigned r = SkGetPackedR32(c); |
| 590 | unsigned g = SkGetPackedG32(c); |
| 591 | unsigned b = SkGetPackedB32(c); |
| 592 | |
| 593 | unsigned mul = SkAlpha255To256(mulp[i]); |
| 594 | unsigned add = addp[i]; |
| 595 | |
| 596 | r = SkFastMin32(SkAlphaMul(r, mul) + add, a); |
| 597 | g = SkFastMin32(SkAlphaMul(g, mul) + add, a); |
| 598 | b = SkFastMin32(SkAlphaMul(b, mul) + add, a); |
| 599 | |
| 600 | span[i] = SkPackARGB32(a, r, g, b); |
| 601 | } |
| 602 | } |
| 603 | else |
| 604 | span[i] = 0; |
| 605 | } |
| 606 | } |
| 607 | else // color |
| 608 | { |
| 609 | unsigned a = SkGetPackedA32(fPMColor); |
| 610 | unsigned r = SkGetPackedR32(fPMColor); |
| 611 | unsigned g = SkGetPackedG32(fPMColor); |
| 612 | unsigned b = SkGetPackedB32(fPMColor); |
| 613 | for (int i = 0; i < count; i++) |
| 614 | { |
| 615 | if (alpha[i]) |
| 616 | { |
| 617 | unsigned mul = SkAlpha255To256(mulp[i]); |
| 618 | unsigned add = addp[i]; |
| 619 | |
| 620 | span[i] = SkPackARGB32( a, |
| 621 | SkFastMin32(SkAlphaMul(r, mul) + add, a), |
| 622 | SkFastMin32(SkAlphaMul(g, mul) + add, a), |
| 623 | SkFastMin32(SkAlphaMul(b, mul) + add, a)); |
| 624 | } |
| 625 | else |
| 626 | span[i] = 0; |
| 627 | } |
| 628 | } |
| 629 | } |
| 630 | |
| 631 | virtual void beginSession() |
| 632 | { |
| 633 | this->INHERITED::beginSession(); |
| 634 | if (fProxy) |
| 635 | fProxy->beginSession(); |
| 636 | } |
| 637 | |
| 638 | virtual void endSession() |
| 639 | { |
| 640 | if (fProxy) |
| 641 | fProxy->endSession(); |
| 642 | this->INHERITED::endSession(); |
| 643 | } |
| 644 | |
| 645 | protected: |
| 646 | Sk3DShader(SkFlattenableReadBuffer& buffer) : |
| 647 | INHERITED(buffer) |
| 648 | { |
| 649 | fProxy = static_cast<SkShader*>(buffer.readFlattenable()); |
| 650 | fPMColor = buffer.readU32(); |
| 651 | fMask = NULL; |
| 652 | } |
| 653 | |
| 654 | virtual void flatten(SkFlattenableWriteBuffer& buffer) |
| 655 | { |
| 656 | this->INHERITED::flatten(buffer); |
| 657 | buffer.writeFlattenable(fProxy); |
| 658 | buffer.write32(fPMColor); |
| 659 | } |
| 660 | |
| 661 | virtual Factory getFactory() |
| 662 | { |
| 663 | return CreateProc; |
| 664 | } |
| 665 | |
| 666 | private: |
| 667 | static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) |
| 668 | { |
| 669 | return SkNEW_ARGS(Sk3DShader, (buffer)); |
| 670 | } |
| 671 | |
| 672 | SkShader* fProxy; |
| 673 | SkPMColor fPMColor; |
| 674 | const SkMask* fMask; |
| 675 | |
| 676 | typedef SkShader INHERITED; |
| 677 | }; |
| 678 | |
| 679 | class Sk3DBlitter : public SkBlitter { |
| 680 | public: |
| 681 | Sk3DBlitter(SkBlitter* proxy, Sk3DShader* shader, void (*killProc)(void*)) |
| 682 | : fProxy(proxy), f3DShader(shader), fKillProc(killProc) |
| 683 | { |
| 684 | shader->ref(); |
| 685 | } |
| 686 | virtual ~Sk3DBlitter() |
| 687 | { |
| 688 | f3DShader->unref(); |
| 689 | fKillProc(fProxy); |
| 690 | } |
| 691 | |
| 692 | virtual void blitH(int x, int y, int width) |
| 693 | { |
| 694 | fProxy->blitH(x, y, width); |
| 695 | } |
| 696 | virtual void blitAntiH(int x, int y, const SkAlpha antialias[], const int16_t runs[]) |
| 697 | { |
| 698 | fProxy->blitAntiH(x, y, antialias, runs); |
| 699 | } |
| 700 | virtual void blitV(int x, int y, int height, SkAlpha alpha) |
| 701 | { |
| 702 | fProxy->blitV(x, y, height, alpha); |
| 703 | } |
| 704 | virtual void blitRect(int x, int y, int width, int height) |
| 705 | { |
| 706 | fProxy->blitRect(x, y, width, height); |
| 707 | } |
| 708 | virtual void blitMask(const SkMask& mask, const SkIRect& clip) |
| 709 | { |
| 710 | if (mask.fFormat == SkMask::k3D_Format) |
| 711 | { |
| 712 | f3DShader->setMask(&mask); |
| 713 | |
| 714 | ((SkMask*)&mask)->fFormat = SkMask::kA8_Format; |
| 715 | fProxy->blitMask(mask, clip); |
| 716 | ((SkMask*)&mask)->fFormat = SkMask::k3D_Format; |
| 717 | |
| 718 | f3DShader->setMask(NULL); |
| 719 | } |
| 720 | else |
| 721 | fProxy->blitMask(mask, clip); |
| 722 | } |
| 723 | private: |
| 724 | SkBlitter* fProxy; |
| 725 | Sk3DShader* f3DShader; |
| 726 | void (*fKillProc)(void*); |
| 727 | }; |
| 728 | |
| 729 | /////////////////////////////////////////////////////////////////////////////////////// |
| 730 | /////////////////////////////////////////////////////////////////////////////////////// |
| 731 | |
| 732 | #include "SkCoreBlitters.h" |
| 733 | |
| 734 | class SkAutoRestoreShader { |
| 735 | public: |
| 736 | SkAutoRestoreShader(const SkPaint& p) : fPaint((SkPaint*)&p) |
| 737 | { |
| 738 | fShader = fPaint->getShader(); |
| 739 | fShader->safeRef(); |
| 740 | } |
| 741 | ~SkAutoRestoreShader() |
| 742 | { |
| 743 | fPaint->setShader(fShader); |
| 744 | fShader->safeUnref(); |
| 745 | } |
| 746 | private: |
| 747 | SkPaint* fPaint; |
| 748 | SkShader* fShader; |
| 749 | }; |
| 750 | |
| 751 | class SkAutoCallProc { |
| 752 | public: |
| 753 | typedef void (*Proc)(void*); |
| 754 | SkAutoCallProc(void* obj, Proc proc) |
| 755 | : fObj(obj), fProc(proc) |
| 756 | { |
| 757 | } |
| 758 | ~SkAutoCallProc() |
| 759 | { |
| 760 | if (fObj && fProc) |
| 761 | fProc(fObj); |
| 762 | } |
| 763 | void* get() const { return fObj; } |
| 764 | void* detach() |
| 765 | { |
| 766 | void* obj = fObj; |
| 767 | fObj = NULL; |
| 768 | return obj; |
| 769 | } |
| 770 | private: |
| 771 | void* fObj; |
| 772 | Proc fProc; |
| 773 | }; |
| 774 | |
| 775 | static void destroy_blitter(void* blitter) |
| 776 | { |
| 777 | ((SkBlitter*)blitter)->~SkBlitter(); |
| 778 | } |
| 779 | |
| 780 | static void delete_blitter(void* blitter) |
| 781 | { |
| 782 | SkDELETE((SkBlitter*)blitter); |
| 783 | } |
| 784 | |
reed@android.com | d252db0 | 2009-04-01 18:31:44 +0000 | [diff] [blame] | 785 | static bool just_solid_color(const SkPaint& paint) { |
| 786 | if (paint.getAlpha() == 0xFF && paint.getColorFilter() == NULL) { |
| 787 | SkShader* shader = paint.getShader(); |
| 788 | if (NULL == shader || |
| 789 | (shader->getFlags() & SkShader::kOpaqueAlpha_Flag)) { |
| 790 | return true; |
| 791 | } |
| 792 | } |
| 793 | return false; |
| 794 | } |
| 795 | |
| 796 | /** By analyzing the paint (with an xfermode), we may decide we can take |
| 797 | special action. This enum lists our possible actions |
| 798 | */ |
| 799 | enum XferInterp { |
| 800 | kNormal_XferInterp, // no special interpretation, draw normally |
| 801 | kSrcOver_XferInterp, // draw as if in srcover mode |
| 802 | kSkipDrawing_XferInterp // draw nothing |
| 803 | }; |
| 804 | |
| 805 | static XferInterp interpret_xfermode(const SkPaint& paint, SkXfermode* xfer, |
| 806 | SkBitmap::Config deviceConfig) { |
reed@android.com | 845fdac | 2009-06-23 03:01:32 +0000 | [diff] [blame] | 807 | SkXfermode::Mode mode; |
reed@android.com | d252db0 | 2009-04-01 18:31:44 +0000 | [diff] [blame] | 808 | |
reed@android.com | 845fdac | 2009-06-23 03:01:32 +0000 | [diff] [blame] | 809 | if (SkXfermode::IsMode(xfer, &mode)) { |
reed@android.com | d252db0 | 2009-04-01 18:31:44 +0000 | [diff] [blame] | 810 | switch (mode) { |
reed@android.com | 845fdac | 2009-06-23 03:01:32 +0000 | [diff] [blame] | 811 | case SkXfermode::kSrc_Mode: |
reed@android.com | d252db0 | 2009-04-01 18:31:44 +0000 | [diff] [blame] | 812 | if (just_solid_color(paint)) { |
| 813 | return kSrcOver_XferInterp; |
| 814 | } |
| 815 | break; |
reed@android.com | 845fdac | 2009-06-23 03:01:32 +0000 | [diff] [blame] | 816 | case SkXfermode::kDst_Mode: |
reed@android.com | d252db0 | 2009-04-01 18:31:44 +0000 | [diff] [blame] | 817 | return kSkipDrawing_XferInterp; |
reed@android.com | 845fdac | 2009-06-23 03:01:32 +0000 | [diff] [blame] | 818 | case SkXfermode::kSrcOver_Mode: |
reed@android.com | d252db0 | 2009-04-01 18:31:44 +0000 | [diff] [blame] | 819 | return kSrcOver_XferInterp; |
reed@android.com | 845fdac | 2009-06-23 03:01:32 +0000 | [diff] [blame] | 820 | case SkXfermode::kDstOver_Mode: |
reed@android.com | d252db0 | 2009-04-01 18:31:44 +0000 | [diff] [blame] | 821 | if (SkBitmap::kRGB_565_Config == deviceConfig) { |
| 822 | return kSkipDrawing_XferInterp; |
| 823 | } |
| 824 | break; |
reed@android.com | 845fdac | 2009-06-23 03:01:32 +0000 | [diff] [blame] | 825 | case SkXfermode::kSrcIn_Mode: |
reed@android.com | d252db0 | 2009-04-01 18:31:44 +0000 | [diff] [blame] | 826 | if (SkBitmap::kRGB_565_Config == deviceConfig && |
| 827 | just_solid_color(paint)) { |
| 828 | return kSrcOver_XferInterp; |
| 829 | } |
| 830 | break; |
reed@android.com | 845fdac | 2009-06-23 03:01:32 +0000 | [diff] [blame] | 831 | case SkXfermode::kDstIn_Mode: |
reed@android.com | d252db0 | 2009-04-01 18:31:44 +0000 | [diff] [blame] | 832 | if (just_solid_color(paint)) { |
| 833 | return kSkipDrawing_XferInterp; |
| 834 | } |
| 835 | break; |
| 836 | default: |
| 837 | break; |
| 838 | } |
| 839 | } |
| 840 | return kNormal_XferInterp; |
| 841 | } |
| 842 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 843 | SkBlitter* SkBlitter::Choose(const SkBitmap& device, |
| 844 | const SkMatrix& matrix, |
| 845 | const SkPaint& paint, |
| 846 | void* storage, size_t storageSize) |
| 847 | { |
| 848 | SkASSERT(storageSize == 0 || storage != NULL); |
| 849 | |
| 850 | SkBlitter* blitter = NULL; |
| 851 | |
| 852 | // which check, in case we're being called by a client with a dummy device |
| 853 | // (e.g. they have a bounder that always aborts the draw) |
| 854 | if (SkBitmap::kNo_Config == device.getConfig()) |
| 855 | { |
| 856 | SK_PLACEMENT_NEW(blitter, SkNullBlitter, storage, storageSize); |
| 857 | return blitter; |
| 858 | } |
| 859 | |
| 860 | SkAutoRestoreShader restore(paint); |
| 861 | SkShader* shader = paint.getShader(); |
| 862 | |
| 863 | Sk3DShader* shader3D = NULL; |
| 864 | if (paint.getMaskFilter() != NULL && paint.getMaskFilter()->getFormat() == SkMask::k3D_Format) |
| 865 | { |
| 866 | shader3D = SkNEW_ARGS(Sk3DShader, (shader)); |
| 867 | ((SkPaint*)&paint)->setShader(shader3D)->unref(); |
| 868 | shader = shader3D; |
| 869 | } |
| 870 | |
| 871 | SkXfermode* mode = paint.getXfermode(); |
reed@android.com | d252db0 | 2009-04-01 18:31:44 +0000 | [diff] [blame] | 872 | if (NULL != mode) { |
| 873 | switch (interpret_xfermode(paint, mode, device.config())) { |
| 874 | case kSrcOver_XferInterp: |
| 875 | mode = NULL; |
| 876 | break; |
| 877 | case kSkipDrawing_XferInterp: |
| 878 | SK_PLACEMENT_NEW(blitter, SkNullBlitter, storage, storageSize); |
| 879 | return blitter; |
| 880 | default: |
| 881 | break; |
| 882 | } |
| 883 | } |
| 884 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 885 | if (NULL == shader && (NULL != mode || paint.getColorFilter() != NULL)) |
| 886 | { |
| 887 | // xfermodes require shaders for our current set of blitters |
| 888 | shader = SkNEW(SkColorShader); |
| 889 | ((SkPaint*)&paint)->setShader(shader)->unref(); |
| 890 | } |
| 891 | |
| 892 | if (paint.getColorFilter() != NULL) |
| 893 | { |
| 894 | SkASSERT(shader); |
| 895 | shader = SkNEW_ARGS(SkFilterShader, (shader, paint.getColorFilter())); |
| 896 | ((SkPaint*)&paint)->setShader(shader)->unref(); |
| 897 | } |
| 898 | |
reed@android.com | cafc9f9 | 2009-08-22 03:44:57 +0000 | [diff] [blame^] | 899 | if (shader && !shader->setContext(device, paint, matrix)) { |
| 900 | return SkNEW(SkNullBlitter); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 901 | } |
| 902 | |
| 903 | switch (device.getConfig()) { |
| 904 | case SkBitmap::kA1_Config: |
| 905 | SK_PLACEMENT_NEW_ARGS(blitter, SkA1_Blitter, storage, storageSize, (device, paint)); |
| 906 | break; |
| 907 | |
| 908 | case SkBitmap::kA8_Config: |
| 909 | if (shader) |
| 910 | SK_PLACEMENT_NEW_ARGS(blitter, SkA8_Shader_Blitter, storage, storageSize, (device, paint)); |
| 911 | else |
| 912 | SK_PLACEMENT_NEW_ARGS(blitter, SkA8_Blitter, storage, storageSize, (device, paint)); |
| 913 | break; |
| 914 | |
| 915 | case SkBitmap::kARGB_4444_Config: |
| 916 | blitter = SkBlitter_ChooseD4444(device, paint, storage, storageSize); |
| 917 | break; |
| 918 | |
| 919 | case SkBitmap::kRGB_565_Config: |
| 920 | if (shader) |
| 921 | { |
| 922 | if (mode) |
| 923 | SK_PLACEMENT_NEW_ARGS(blitter, SkRGB16_Shader_Xfermode_Blitter, storage, storageSize, (device, paint)); |
reed@android.com | cafc9f9 | 2009-08-22 03:44:57 +0000 | [diff] [blame^] | 924 | else if (shader->canCallShadeSpan16()) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 925 | SK_PLACEMENT_NEW_ARGS(blitter, SkRGB16_Shader16_Blitter, storage, storageSize, (device, paint)); |
| 926 | else |
| 927 | SK_PLACEMENT_NEW_ARGS(blitter, SkRGB16_Shader_Blitter, storage, storageSize, (device, paint)); |
reed@android.com | 9a74d31 | 2009-06-15 15:56:35 +0000 | [diff] [blame] | 928 | } else { |
| 929 | SkColor color = paint.getColor(); |
| 930 | if (0 == SkColorGetA(color)) { |
| 931 | SK_PLACEMENT_NEW(blitter, SkNullBlitter, storage, storageSize); |
| 932 | } else if (SK_ColorBLACK == color) { |
| 933 | SK_PLACEMENT_NEW_ARGS(blitter, SkRGB16_Black_Blitter, storage, |
| 934 | storageSize, (device, paint)); |
| 935 | } else if (0xFF == SkColorGetA(color)) { |
| 936 | SK_PLACEMENT_NEW_ARGS(blitter, SkRGB16_Opaque_Blitter, storage, |
| 937 | storageSize, (device, paint)); |
| 938 | } else { |
| 939 | SK_PLACEMENT_NEW_ARGS(blitter, SkRGB16_Blitter, storage, |
| 940 | storageSize, (device, paint)); |
| 941 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 942 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 943 | break; |
| 944 | |
| 945 | case SkBitmap::kARGB_8888_Config: |
| 946 | if (shader) |
| 947 | SK_PLACEMENT_NEW_ARGS(blitter, SkARGB32_Shader_Blitter, storage, storageSize, (device, paint)); |
| 948 | else if (paint.getColor() == SK_ColorBLACK) |
| 949 | SK_PLACEMENT_NEW_ARGS(blitter, SkARGB32_Black_Blitter, storage, storageSize, (device, paint)); |
| 950 | else if (paint.getAlpha() == 0xFF) |
| 951 | SK_PLACEMENT_NEW_ARGS(blitter, SkARGB32_Opaque_Blitter, storage, storageSize, (device, paint)); |
| 952 | else |
| 953 | SK_PLACEMENT_NEW_ARGS(blitter, SkARGB32_Blitter, storage, storageSize, (device, paint)); |
| 954 | break; |
| 955 | |
| 956 | default: |
| 957 | SkASSERT(!"unsupported device config"); |
| 958 | SK_PLACEMENT_NEW(blitter, SkNullBlitter, storage, storageSize); |
| 959 | } |
| 960 | |
| 961 | if (shader3D) |
| 962 | { |
| 963 | void (*proc)(void*) = ((void*)storage == (void*)blitter) ? destroy_blitter : delete_blitter; |
| 964 | SkAutoCallProc tmp(blitter, proc); |
| 965 | |
| 966 | blitter = SkNEW_ARGS(Sk3DBlitter, (blitter, shader3D, proc)); |
| 967 | (void)tmp.detach(); |
| 968 | } |
| 969 | return blitter; |
| 970 | } |
| 971 | |
| 972 | ////////////////////////////////////////////////////////////////////////////////////////////////////// |
| 973 | |
| 974 | const uint16_t gMask_0F0F = 0xF0F; |
| 975 | const uint32_t gMask_00FF00FF = 0xFF00FF; |
| 976 | |
| 977 | ////////////////////////////////////////////////////////////////////////////////////////////////////// |
| 978 | |
| 979 | SkShaderBlitter::SkShaderBlitter(const SkBitmap& device, const SkPaint& paint) |
reed@android.com | 5119bdb | 2009-06-12 21:27:03 +0000 | [diff] [blame] | 980 | : INHERITED(device) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 981 | fShader = paint.getShader(); |
| 982 | SkASSERT(fShader); |
| 983 | |
| 984 | fShader->ref(); |
| 985 | fShader->beginSession(); |
reed@android.com | 5119bdb | 2009-06-12 21:27:03 +0000 | [diff] [blame] | 986 | fShaderFlags = fShader->getFlags(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 987 | } |
| 988 | |
reed@android.com | 5119bdb | 2009-06-12 21:27:03 +0000 | [diff] [blame] | 989 | SkShaderBlitter::~SkShaderBlitter() { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 990 | fShader->endSession(); |
| 991 | fShader->unref(); |
| 992 | } |
| 993 | |