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 | |
| 28 | SkBlitter::~SkBlitter() |
| 29 | { |
| 30 | } |
| 31 | |
| 32 | const SkBitmap* SkBlitter::justAnOpaqueColor(uint32_t* value) |
| 33 | { |
| 34 | return NULL; |
| 35 | } |
| 36 | |
| 37 | void SkBlitter::blitH(int x, int y, int width) |
| 38 | { |
| 39 | SkASSERT(!"unimplemented"); |
| 40 | } |
| 41 | |
| 42 | void SkBlitter::blitAntiH(int x, int y, const SkAlpha antialias[], const int16_t runs[]) |
| 43 | { |
| 44 | SkASSERT(!"unimplemented"); |
| 45 | } |
| 46 | |
| 47 | void SkBlitter::blitV(int x, int y, int height, SkAlpha alpha) |
| 48 | { |
| 49 | if (alpha == 255) |
| 50 | this->blitRect(x, y, 1, height); |
| 51 | else |
| 52 | { |
| 53 | int16_t runs[2]; |
| 54 | runs[0] = 1; |
| 55 | runs[1] = 0; |
| 56 | |
| 57 | while (--height >= 0) |
| 58 | this->blitAntiH(x, y++, &alpha, runs); |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | void SkBlitter::blitRect(int x, int y, int width, int height) |
| 63 | { |
| 64 | while (--height >= 0) |
| 65 | this->blitH(x, y++, width); |
| 66 | } |
| 67 | |
| 68 | ////////////////////////////////////////////////////////////////////////////// |
| 69 | |
| 70 | static inline void bits_to_runs(SkBlitter* blitter, int x, int y, const uint8_t bits[], |
| 71 | U8CPU left_mask, int rowBytes, U8CPU right_mask) |
| 72 | { |
| 73 | int inFill = 0; |
| 74 | int pos = 0; |
| 75 | |
| 76 | while (--rowBytes >= 0) |
| 77 | { |
| 78 | unsigned b = *bits++ & left_mask; |
| 79 | if (rowBytes == 0) |
| 80 | b &= right_mask; |
| 81 | |
| 82 | for (unsigned test = 0x80; test != 0; test >>= 1) |
| 83 | { |
| 84 | if (b & test) |
| 85 | { |
| 86 | if (!inFill) |
| 87 | { |
| 88 | pos = x; |
| 89 | inFill = true; |
| 90 | } |
| 91 | } |
| 92 | else |
| 93 | { |
| 94 | if (inFill) |
| 95 | { |
| 96 | blitter->blitH(pos, y, x - pos); |
| 97 | inFill = false; |
| 98 | } |
| 99 | } |
| 100 | x += 1; |
| 101 | } |
| 102 | left_mask = 0xFF; |
| 103 | } |
| 104 | |
| 105 | // final cleanup |
| 106 | if (inFill) |
| 107 | blitter->blitH(pos, y, x - pos); |
| 108 | } |
| 109 | |
| 110 | void SkBlitter::blitMask(const SkMask& mask, const SkIRect& clip) |
| 111 | { |
| 112 | SkASSERT(mask.fBounds.contains(clip)); |
| 113 | |
| 114 | if (mask.fFormat == SkMask::kBW_Format) |
| 115 | { |
| 116 | int cx = clip.fLeft; |
| 117 | int cy = clip.fTop; |
| 118 | int maskLeft = mask.fBounds.fLeft; |
| 119 | int mask_rowBytes = mask.fRowBytes; |
| 120 | int height = clip.height(); |
| 121 | |
| 122 | const uint8_t* bits = mask.getAddr1(cx, cy); |
| 123 | |
| 124 | if (cx == maskLeft && clip.fRight == mask.fBounds.fRight) |
| 125 | { |
| 126 | while (--height >= 0) |
| 127 | { |
| 128 | bits_to_runs(this, cx, cy, bits, 0xFF, mask_rowBytes, 0xFF); |
| 129 | bits += mask_rowBytes; |
| 130 | cy += 1; |
| 131 | } |
| 132 | } |
| 133 | else |
| 134 | { |
| 135 | int left_edge = cx - maskLeft; |
| 136 | SkASSERT(left_edge >= 0); |
| 137 | int rite_edge = clip.fRight - maskLeft; |
| 138 | SkASSERT(rite_edge > left_edge); |
| 139 | |
| 140 | int left_mask = 0xFF >> (left_edge & 7); |
| 141 | int rite_mask = 0xFF << (8 - (rite_edge & 7)); |
| 142 | int full_runs = (rite_edge >> 3) - ((left_edge + 7) >> 3); |
| 143 | |
| 144 | // check for empty right mask, so we don't read off the end (or go slower than we need to) |
| 145 | if (rite_mask == 0) |
| 146 | { |
| 147 | SkASSERT(full_runs >= 0); |
| 148 | full_runs -= 1; |
| 149 | rite_mask = 0xFF; |
| 150 | } |
| 151 | if (left_mask == 0xFF) |
| 152 | full_runs -= 1; |
| 153 | |
| 154 | // back up manually so we can keep in sync with our byte-aligned src |
| 155 | // have cx reflect our actual starting x-coord |
| 156 | cx -= left_edge & 7; |
| 157 | |
| 158 | if (full_runs < 0) |
| 159 | { |
| 160 | SkASSERT((left_mask & rite_mask) != 0); |
| 161 | while (--height >= 0) |
| 162 | { |
| 163 | bits_to_runs(this, cx, cy, bits, left_mask, 1, rite_mask); |
| 164 | bits += mask_rowBytes; |
| 165 | cy += 1; |
| 166 | } |
| 167 | } |
| 168 | else |
| 169 | { |
| 170 | while (--height >= 0) |
| 171 | { |
| 172 | bits_to_runs(this, cx, cy, bits, left_mask, full_runs + 2, rite_mask); |
| 173 | bits += mask_rowBytes; |
| 174 | cy += 1; |
| 175 | } |
| 176 | } |
| 177 | } |
| 178 | } |
| 179 | else |
| 180 | { |
| 181 | int width = clip.width(); |
| 182 | SkAutoSTMalloc<64, int16_t> runStorage(width + 1); |
| 183 | int16_t* runs = runStorage.get(); |
| 184 | const uint8_t* aa = mask.getAddr(clip.fLeft, clip.fTop); |
| 185 | |
| 186 | sk_memset16((uint16_t*)runs, 1, width); |
| 187 | runs[width] = 0; |
| 188 | |
| 189 | int height = clip.height(); |
| 190 | int y = clip.fTop; |
| 191 | while (--height >= 0) |
| 192 | { |
| 193 | this->blitAntiH(clip.fLeft, y, aa, runs); |
| 194 | aa += mask.fRowBytes; |
| 195 | y += 1; |
| 196 | } |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | /////////////////////// these guys are not virtual, just a helpers |
| 201 | |
| 202 | void SkBlitter::blitMaskRegion(const SkMask& mask, const SkRegion& clip) { |
| 203 | if (clip.quickReject(mask.fBounds)) { |
| 204 | return; |
| 205 | } |
| 206 | |
| 207 | SkRegion::Cliperator clipper(clip, mask.fBounds); |
| 208 | |
| 209 | while (!clipper.done()) { |
| 210 | const SkIRect& cr = clipper.rect(); |
| 211 | this->blitMask(mask, cr); |
| 212 | clipper.next(); |
| 213 | } |
| 214 | } |
| 215 | |
| 216 | void SkBlitter::blitRectRegion(const SkIRect& rect, const SkRegion& clip) { |
| 217 | SkRegion::Cliperator clipper(clip, rect); |
| 218 | |
| 219 | while (!clipper.done()) { |
| 220 | const SkIRect& cr = clipper.rect(); |
| 221 | this->blitRect(cr.fLeft, cr.fTop, cr.width(), cr.height()); |
| 222 | clipper.next(); |
| 223 | } |
| 224 | } |
| 225 | |
| 226 | void SkBlitter::blitRegion(const SkRegion& clip) { |
| 227 | SkRegion::Iterator iter(clip); |
| 228 | |
| 229 | while (!iter.done()) { |
| 230 | const SkIRect& cr = iter.rect(); |
| 231 | this->blitRect(cr.fLeft, cr.fTop, cr.width(), cr.height()); |
| 232 | iter.next(); |
| 233 | } |
| 234 | } |
| 235 | |
| 236 | /////////////////////////////////////////////////////////////////////////////////////// |
| 237 | /////////////////////////////////////////////////////////////////////////////////////// |
| 238 | |
| 239 | void SkNullBlitter::blitH(int x, int y, int width) |
| 240 | { |
| 241 | } |
| 242 | |
| 243 | void SkNullBlitter::blitAntiH(int x, int y, const SkAlpha antialias[], const int16_t runs[]) |
| 244 | { |
| 245 | } |
| 246 | |
| 247 | void SkNullBlitter::blitV(int x, int y, int height, SkAlpha alpha) |
| 248 | { |
| 249 | } |
| 250 | |
| 251 | void SkNullBlitter::blitRect(int x, int y, int width, int height) |
| 252 | { |
| 253 | } |
| 254 | |
| 255 | void SkNullBlitter::blitMask(const SkMask& mask, const SkIRect& clip) |
| 256 | { |
| 257 | } |
| 258 | |
| 259 | const SkBitmap* SkNullBlitter::justAnOpaqueColor(uint32_t* value) |
| 260 | { |
| 261 | return NULL; |
| 262 | } |
| 263 | |
| 264 | /////////////////////////////////////////////////////////////////////////////////////// |
| 265 | /////////////////////////////////////////////////////////////////////////////////////// |
| 266 | |
| 267 | static int compute_anti_width(const int16_t runs[]) |
| 268 | { |
| 269 | int width = 0; |
| 270 | |
| 271 | for (;;) |
| 272 | { |
| 273 | int count = runs[0]; |
| 274 | |
| 275 | SkASSERT(count >= 0); |
| 276 | if (count == 0) |
| 277 | break; |
| 278 | width += count; |
| 279 | runs += count; |
| 280 | |
| 281 | SkASSERT(width < 20000); |
| 282 | } |
| 283 | return width; |
| 284 | } |
| 285 | |
| 286 | static inline bool y_in_rect(int y, const SkIRect& rect) |
| 287 | { |
| 288 | return (unsigned)(y - rect.fTop) < (unsigned)rect.height(); |
| 289 | } |
| 290 | |
| 291 | static inline bool x_in_rect(int x, const SkIRect& rect) |
| 292 | { |
| 293 | return (unsigned)(x - rect.fLeft) < (unsigned)rect.width(); |
| 294 | } |
| 295 | |
| 296 | void SkRectClipBlitter::blitH(int left, int y, int width) |
| 297 | { |
| 298 | SkASSERT(width > 0); |
| 299 | |
| 300 | if (!y_in_rect(y, fClipRect)) |
| 301 | return; |
| 302 | |
| 303 | int right = left + width; |
| 304 | |
| 305 | if (left < fClipRect.fLeft) |
| 306 | left = fClipRect.fLeft; |
| 307 | if (right > fClipRect.fRight) |
| 308 | right = fClipRect.fRight; |
| 309 | |
| 310 | width = right - left; |
| 311 | if (width > 0) |
| 312 | fBlitter->blitH(left, y, width); |
| 313 | } |
| 314 | |
| 315 | void SkRectClipBlitter::blitAntiH(int left, int y, const SkAlpha aa[], const int16_t runs[]) |
| 316 | { |
| 317 | if (!y_in_rect(y, fClipRect) || left >= fClipRect.fRight) |
| 318 | return; |
| 319 | |
| 320 | int x0 = left; |
| 321 | int x1 = left + compute_anti_width(runs); |
| 322 | |
| 323 | if (x1 <= fClipRect.fLeft) |
| 324 | return; |
| 325 | |
| 326 | SkASSERT(x0 < x1); |
| 327 | if (x0 < fClipRect.fLeft) |
| 328 | { |
| 329 | int dx = fClipRect.fLeft - x0; |
| 330 | SkAlphaRuns::BreakAt((int16_t*)runs, (uint8_t*)aa, dx); |
| 331 | runs += dx; |
| 332 | aa += dx; |
| 333 | x0 = fClipRect.fLeft; |
| 334 | } |
| 335 | |
| 336 | SkASSERT(x0 < x1 && runs[x1 - x0] == 0); |
| 337 | if (x1 > fClipRect.fRight) |
| 338 | { |
| 339 | x1 = fClipRect.fRight; |
| 340 | SkAlphaRuns::BreakAt((int16_t*)runs, (uint8_t*)aa, x1 - x0); |
| 341 | ((int16_t*)runs)[x1 - x0] = 0; |
| 342 | } |
| 343 | |
| 344 | SkASSERT(x0 < x1 && runs[x1 - x0] == 0); |
| 345 | SkASSERT(compute_anti_width(runs) == x1 - x0); |
| 346 | |
| 347 | fBlitter->blitAntiH(x0, y, aa, runs); |
| 348 | } |
| 349 | |
| 350 | void SkRectClipBlitter::blitV(int x, int y, int height, SkAlpha alpha) |
| 351 | { |
| 352 | SkASSERT(height > 0); |
| 353 | |
| 354 | if (!x_in_rect(x, fClipRect)) |
| 355 | return; |
| 356 | |
| 357 | int y0 = y; |
| 358 | int y1 = y + height; |
| 359 | |
| 360 | if (y0 < fClipRect.fTop) |
| 361 | y0 = fClipRect.fTop; |
| 362 | if (y1 > fClipRect.fBottom) |
| 363 | y1 = fClipRect.fBottom; |
| 364 | |
| 365 | if (y0 < y1) |
| 366 | fBlitter->blitV(x, y0, y1 - y0, alpha); |
| 367 | } |
| 368 | |
| 369 | void SkRectClipBlitter::blitRect(int left, int y, int width, int height) |
| 370 | { |
| 371 | SkIRect r; |
| 372 | |
| 373 | r.set(left, y, left + width, y + height); |
| 374 | if (r.intersect(fClipRect)) |
| 375 | fBlitter->blitRect(r.fLeft, r.fTop, r.width(), r.height()); |
| 376 | } |
| 377 | |
| 378 | void SkRectClipBlitter::blitMask(const SkMask& mask, const SkIRect& clip) |
| 379 | { |
| 380 | SkASSERT(mask.fBounds.contains(clip)); |
| 381 | |
| 382 | SkIRect r = clip; |
| 383 | |
| 384 | if (r.intersect(fClipRect)) |
| 385 | fBlitter->blitMask(mask, r); |
| 386 | } |
| 387 | |
| 388 | const SkBitmap* SkRectClipBlitter::justAnOpaqueColor(uint32_t* value) |
| 389 | { |
| 390 | return fBlitter->justAnOpaqueColor(value); |
| 391 | } |
| 392 | |
| 393 | /////////////////////////////////////////////////////////////////////////////////////// |
| 394 | /////////////////////////////////////////////////////////////////////////////////////// |
| 395 | |
| 396 | void SkRgnClipBlitter::blitH(int x, int y, int width) |
| 397 | { |
| 398 | SkRegion::Spanerator span(*fRgn, y, x, x + width); |
| 399 | int left, right; |
| 400 | |
| 401 | while (span.next(&left, &right)) |
| 402 | { |
| 403 | SkASSERT(left < right); |
| 404 | fBlitter->blitH(left, y, right - left); |
| 405 | } |
| 406 | } |
| 407 | |
| 408 | void SkRgnClipBlitter::blitAntiH(int x, int y, const SkAlpha aa[], const int16_t runs[]) |
| 409 | { |
| 410 | int width = compute_anti_width(runs); |
| 411 | SkRegion::Spanerator span(*fRgn, y, x, x + width); |
| 412 | int left, right; |
| 413 | SkDEBUGCODE(const SkIRect& bounds = fRgn->getBounds();) |
| 414 | |
| 415 | int prevRite = x; |
| 416 | while (span.next(&left, &right)) |
| 417 | { |
| 418 | SkASSERT(x <= left); |
| 419 | SkASSERT(left < right); |
| 420 | SkASSERT(left >= bounds.fLeft && right <= bounds.fRight); |
| 421 | |
| 422 | SkAlphaRuns::Break((int16_t*)runs, (uint8_t*)aa, left - x, right - left); |
| 423 | |
| 424 | // now zero before left |
| 425 | if (left > prevRite) |
| 426 | { |
| 427 | int index = prevRite - x; |
| 428 | ((uint8_t*)aa)[index] = 0; // skip runs after right |
| 429 | ((int16_t*)runs)[index] = SkToS16(left - prevRite); |
| 430 | } |
| 431 | |
| 432 | prevRite = right; |
| 433 | } |
| 434 | |
| 435 | if (prevRite > x) |
| 436 | { |
| 437 | ((int16_t*)runs)[prevRite - x] = 0; |
| 438 | |
| 439 | if (x < 0) { |
| 440 | int skip = runs[0]; |
| 441 | SkASSERT(skip >= -x); |
| 442 | aa += skip; |
| 443 | runs += skip; |
| 444 | x += skip; |
| 445 | } |
| 446 | fBlitter->blitAntiH(x, y, aa, runs); |
| 447 | } |
| 448 | } |
| 449 | |
| 450 | void SkRgnClipBlitter::blitV(int x, int y, int height, SkAlpha alpha) |
| 451 | { |
| 452 | SkIRect bounds; |
| 453 | bounds.set(x, y, x + 1, y + height); |
| 454 | |
| 455 | SkRegion::Cliperator iter(*fRgn, bounds); |
| 456 | |
| 457 | while (!iter.done()) |
| 458 | { |
| 459 | const SkIRect& r = iter.rect(); |
| 460 | SkASSERT(bounds.contains(r)); |
| 461 | |
| 462 | fBlitter->blitV(x, r.fTop, r.height(), alpha); |
| 463 | iter.next(); |
| 464 | } |
| 465 | } |
| 466 | |
| 467 | void SkRgnClipBlitter::blitRect(int x, int y, int width, int height) |
| 468 | { |
| 469 | SkIRect bounds; |
| 470 | bounds.set(x, y, x + width, y + height); |
| 471 | |
| 472 | SkRegion::Cliperator iter(*fRgn, bounds); |
| 473 | |
| 474 | while (!iter.done()) |
| 475 | { |
| 476 | const SkIRect& r = iter.rect(); |
| 477 | SkASSERT(bounds.contains(r)); |
| 478 | |
| 479 | fBlitter->blitRect(r.fLeft, r.fTop, r.width(), r.height()); |
| 480 | iter.next(); |
| 481 | } |
| 482 | } |
| 483 | |
| 484 | void SkRgnClipBlitter::blitMask(const SkMask& mask, const SkIRect& clip) |
| 485 | { |
| 486 | SkASSERT(mask.fBounds.contains(clip)); |
| 487 | |
| 488 | SkRegion::Cliperator iter(*fRgn, clip); |
| 489 | const SkIRect& r = iter.rect(); |
| 490 | SkBlitter* blitter = fBlitter; |
| 491 | |
| 492 | while (!iter.done()) |
| 493 | { |
| 494 | blitter->blitMask(mask, r); |
| 495 | iter.next(); |
| 496 | } |
| 497 | } |
| 498 | |
| 499 | const SkBitmap* SkRgnClipBlitter::justAnOpaqueColor(uint32_t* value) |
| 500 | { |
| 501 | return fBlitter->justAnOpaqueColor(value); |
| 502 | } |
| 503 | |
| 504 | /////////////////////////////////////////////////////////////////////////////////////// |
| 505 | /////////////////////////////////////////////////////////////////////////////////////// |
| 506 | |
| 507 | SkBlitter* SkBlitterClipper::apply(SkBlitter* blitter, const SkRegion* clip, const SkIRect* ir) |
| 508 | { |
| 509 | if (clip) |
| 510 | { |
| 511 | const SkIRect& clipR = clip->getBounds(); |
| 512 | |
| 513 | if (clip->isEmpty() || (ir && !SkIRect::Intersects(clipR, *ir))) |
| 514 | blitter = &fNullBlitter; |
| 515 | else if (clip->isRect()) |
| 516 | { |
| 517 | if (ir == NULL || !clipR.contains(*ir)) |
| 518 | { |
| 519 | fRectBlitter.init(blitter, clipR); |
| 520 | blitter = &fRectBlitter; |
| 521 | } |
| 522 | } |
| 523 | else |
| 524 | { |
| 525 | fRgnBlitter.init(blitter, clip); |
| 526 | blitter = &fRgnBlitter; |
| 527 | } |
| 528 | } |
| 529 | return blitter; |
| 530 | } |
| 531 | |
| 532 | /////////////////////////////////////////////////////////////////////////////////////// |
| 533 | /////////////////////////////////////////////////////////////////////////////////////// |
| 534 | |
| 535 | #include "SkColorShader.h" |
| 536 | #include "SkColorPriv.h" |
| 537 | |
| 538 | class Sk3DShader : public SkShader { |
| 539 | public: |
| 540 | Sk3DShader(SkShader* proxy) : fProxy(proxy) |
| 541 | { |
| 542 | proxy->safeRef(); |
| 543 | fMask = NULL; |
| 544 | } |
| 545 | virtual ~Sk3DShader() |
| 546 | { |
| 547 | fProxy->safeUnref(); |
| 548 | } |
| 549 | void setMask(const SkMask* mask) { fMask = mask; } |
| 550 | |
| 551 | virtual bool setContext(const SkBitmap& device, const SkPaint& paint, const SkMatrix& matrix) |
| 552 | { |
| 553 | if (fProxy) |
| 554 | return fProxy->setContext(device, paint, matrix); |
| 555 | else |
| 556 | { |
| 557 | fPMColor = SkPreMultiplyColor(paint.getColor()); |
| 558 | return this->INHERITED::setContext(device, paint, matrix); |
| 559 | } |
| 560 | } |
| 561 | virtual void shadeSpan(int x, int y, SkPMColor span[], int count) |
| 562 | { |
| 563 | if (fProxy) |
| 564 | fProxy->shadeSpan(x, y, span, count); |
| 565 | |
| 566 | if (fMask == NULL) |
| 567 | { |
| 568 | if (fProxy == NULL) |
| 569 | sk_memset32(span, fPMColor, count); |
| 570 | return; |
| 571 | } |
| 572 | |
| 573 | SkASSERT(fMask->fBounds.contains(x, y)); |
| 574 | SkASSERT(fMask->fBounds.contains(x + count - 1, y)); |
| 575 | |
| 576 | size_t size = fMask->computeImageSize(); |
| 577 | const uint8_t* alpha = fMask->getAddr(x, y); |
| 578 | const uint8_t* mulp = alpha + size; |
| 579 | const uint8_t* addp = mulp + size; |
| 580 | |
| 581 | if (fProxy) |
| 582 | { |
| 583 | for (int i = 0; i < count; i++) |
| 584 | { |
| 585 | if (alpha[i]) |
| 586 | { |
| 587 | SkPMColor c = span[i]; |
| 588 | if (c) |
| 589 | { |
| 590 | unsigned a = SkGetPackedA32(c); |
| 591 | unsigned r = SkGetPackedR32(c); |
| 592 | unsigned g = SkGetPackedG32(c); |
| 593 | unsigned b = SkGetPackedB32(c); |
| 594 | |
| 595 | unsigned mul = SkAlpha255To256(mulp[i]); |
| 596 | unsigned add = addp[i]; |
| 597 | |
| 598 | r = SkFastMin32(SkAlphaMul(r, mul) + add, a); |
| 599 | g = SkFastMin32(SkAlphaMul(g, mul) + add, a); |
| 600 | b = SkFastMin32(SkAlphaMul(b, mul) + add, a); |
| 601 | |
| 602 | span[i] = SkPackARGB32(a, r, g, b); |
| 603 | } |
| 604 | } |
| 605 | else |
| 606 | span[i] = 0; |
| 607 | } |
| 608 | } |
| 609 | else // color |
| 610 | { |
| 611 | unsigned a = SkGetPackedA32(fPMColor); |
| 612 | unsigned r = SkGetPackedR32(fPMColor); |
| 613 | unsigned g = SkGetPackedG32(fPMColor); |
| 614 | unsigned b = SkGetPackedB32(fPMColor); |
| 615 | for (int i = 0; i < count; i++) |
| 616 | { |
| 617 | if (alpha[i]) |
| 618 | { |
| 619 | unsigned mul = SkAlpha255To256(mulp[i]); |
| 620 | unsigned add = addp[i]; |
| 621 | |
| 622 | span[i] = SkPackARGB32( a, |
| 623 | SkFastMin32(SkAlphaMul(r, mul) + add, a), |
| 624 | SkFastMin32(SkAlphaMul(g, mul) + add, a), |
| 625 | SkFastMin32(SkAlphaMul(b, mul) + add, a)); |
| 626 | } |
| 627 | else |
| 628 | span[i] = 0; |
| 629 | } |
| 630 | } |
| 631 | } |
| 632 | |
| 633 | virtual void beginSession() |
| 634 | { |
| 635 | this->INHERITED::beginSession(); |
| 636 | if (fProxy) |
| 637 | fProxy->beginSession(); |
| 638 | } |
| 639 | |
| 640 | virtual void endSession() |
| 641 | { |
| 642 | if (fProxy) |
| 643 | fProxy->endSession(); |
| 644 | this->INHERITED::endSession(); |
| 645 | } |
| 646 | |
| 647 | protected: |
| 648 | Sk3DShader(SkFlattenableReadBuffer& buffer) : |
| 649 | INHERITED(buffer) |
| 650 | { |
| 651 | fProxy = static_cast<SkShader*>(buffer.readFlattenable()); |
| 652 | fPMColor = buffer.readU32(); |
| 653 | fMask = NULL; |
| 654 | } |
| 655 | |
| 656 | virtual void flatten(SkFlattenableWriteBuffer& buffer) |
| 657 | { |
| 658 | this->INHERITED::flatten(buffer); |
| 659 | buffer.writeFlattenable(fProxy); |
| 660 | buffer.write32(fPMColor); |
| 661 | } |
| 662 | |
| 663 | virtual Factory getFactory() |
| 664 | { |
| 665 | return CreateProc; |
| 666 | } |
| 667 | |
| 668 | private: |
| 669 | static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) |
| 670 | { |
| 671 | return SkNEW_ARGS(Sk3DShader, (buffer)); |
| 672 | } |
| 673 | |
| 674 | SkShader* fProxy; |
| 675 | SkPMColor fPMColor; |
| 676 | const SkMask* fMask; |
| 677 | |
| 678 | typedef SkShader INHERITED; |
| 679 | }; |
| 680 | |
| 681 | class Sk3DBlitter : public SkBlitter { |
| 682 | public: |
| 683 | Sk3DBlitter(SkBlitter* proxy, Sk3DShader* shader, void (*killProc)(void*)) |
| 684 | : fProxy(proxy), f3DShader(shader), fKillProc(killProc) |
| 685 | { |
| 686 | shader->ref(); |
| 687 | } |
| 688 | virtual ~Sk3DBlitter() |
| 689 | { |
| 690 | f3DShader->unref(); |
| 691 | fKillProc(fProxy); |
| 692 | } |
| 693 | |
| 694 | virtual void blitH(int x, int y, int width) |
| 695 | { |
| 696 | fProxy->blitH(x, y, width); |
| 697 | } |
| 698 | virtual void blitAntiH(int x, int y, const SkAlpha antialias[], const int16_t runs[]) |
| 699 | { |
| 700 | fProxy->blitAntiH(x, y, antialias, runs); |
| 701 | } |
| 702 | virtual void blitV(int x, int y, int height, SkAlpha alpha) |
| 703 | { |
| 704 | fProxy->blitV(x, y, height, alpha); |
| 705 | } |
| 706 | virtual void blitRect(int x, int y, int width, int height) |
| 707 | { |
| 708 | fProxy->blitRect(x, y, width, height); |
| 709 | } |
| 710 | virtual void blitMask(const SkMask& mask, const SkIRect& clip) |
| 711 | { |
| 712 | if (mask.fFormat == SkMask::k3D_Format) |
| 713 | { |
| 714 | f3DShader->setMask(&mask); |
| 715 | |
| 716 | ((SkMask*)&mask)->fFormat = SkMask::kA8_Format; |
| 717 | fProxy->blitMask(mask, clip); |
| 718 | ((SkMask*)&mask)->fFormat = SkMask::k3D_Format; |
| 719 | |
| 720 | f3DShader->setMask(NULL); |
| 721 | } |
| 722 | else |
| 723 | fProxy->blitMask(mask, clip); |
| 724 | } |
| 725 | private: |
| 726 | SkBlitter* fProxy; |
| 727 | Sk3DShader* f3DShader; |
| 728 | void (*fKillProc)(void*); |
| 729 | }; |
| 730 | |
| 731 | /////////////////////////////////////////////////////////////////////////////////////// |
| 732 | /////////////////////////////////////////////////////////////////////////////////////// |
| 733 | |
| 734 | #include "SkCoreBlitters.h" |
| 735 | |
| 736 | class SkAutoRestoreShader { |
| 737 | public: |
| 738 | SkAutoRestoreShader(const SkPaint& p) : fPaint((SkPaint*)&p) |
| 739 | { |
| 740 | fShader = fPaint->getShader(); |
| 741 | fShader->safeRef(); |
| 742 | } |
| 743 | ~SkAutoRestoreShader() |
| 744 | { |
| 745 | fPaint->setShader(fShader); |
| 746 | fShader->safeUnref(); |
| 747 | } |
| 748 | private: |
| 749 | SkPaint* fPaint; |
| 750 | SkShader* fShader; |
| 751 | }; |
| 752 | |
| 753 | class SkAutoCallProc { |
| 754 | public: |
| 755 | typedef void (*Proc)(void*); |
| 756 | SkAutoCallProc(void* obj, Proc proc) |
| 757 | : fObj(obj), fProc(proc) |
| 758 | { |
| 759 | } |
| 760 | ~SkAutoCallProc() |
| 761 | { |
| 762 | if (fObj && fProc) |
| 763 | fProc(fObj); |
| 764 | } |
| 765 | void* get() const { return fObj; } |
| 766 | void* detach() |
| 767 | { |
| 768 | void* obj = fObj; |
| 769 | fObj = NULL; |
| 770 | return obj; |
| 771 | } |
| 772 | private: |
| 773 | void* fObj; |
| 774 | Proc fProc; |
| 775 | }; |
| 776 | |
| 777 | static void destroy_blitter(void* blitter) |
| 778 | { |
| 779 | ((SkBlitter*)blitter)->~SkBlitter(); |
| 780 | } |
| 781 | |
| 782 | static void delete_blitter(void* blitter) |
| 783 | { |
| 784 | SkDELETE((SkBlitter*)blitter); |
| 785 | } |
| 786 | |
reed@android.com | d252db0 | 2009-04-01 18:31:44 +0000 | [diff] [blame] | 787 | static bool just_solid_color(const SkPaint& paint) { |
| 788 | if (paint.getAlpha() == 0xFF && paint.getColorFilter() == NULL) { |
| 789 | SkShader* shader = paint.getShader(); |
| 790 | if (NULL == shader || |
| 791 | (shader->getFlags() & SkShader::kOpaqueAlpha_Flag)) { |
| 792 | return true; |
| 793 | } |
| 794 | } |
| 795 | return false; |
| 796 | } |
| 797 | |
| 798 | /** By analyzing the paint (with an xfermode), we may decide we can take |
| 799 | special action. This enum lists our possible actions |
| 800 | */ |
| 801 | enum XferInterp { |
| 802 | kNormal_XferInterp, // no special interpretation, draw normally |
| 803 | kSrcOver_XferInterp, // draw as if in srcover mode |
| 804 | kSkipDrawing_XferInterp // draw nothing |
| 805 | }; |
| 806 | |
| 807 | static XferInterp interpret_xfermode(const SkPaint& paint, SkXfermode* xfer, |
| 808 | SkBitmap::Config deviceConfig) { |
| 809 | SkPorterDuff::Mode mode; |
| 810 | |
| 811 | if (SkPorterDuff::IsMode(xfer, &mode)) { |
| 812 | switch (mode) { |
| 813 | case SkPorterDuff::kSrc_Mode: |
| 814 | if (just_solid_color(paint)) { |
| 815 | return kSrcOver_XferInterp; |
| 816 | } |
| 817 | break; |
| 818 | case SkPorterDuff::kDst_Mode: |
| 819 | return kSkipDrawing_XferInterp; |
| 820 | case SkPorterDuff::kSrcOver_Mode: |
| 821 | return kSrcOver_XferInterp; |
| 822 | case SkPorterDuff::kDstOver_Mode: |
| 823 | if (SkBitmap::kRGB_565_Config == deviceConfig) { |
| 824 | return kSkipDrawing_XferInterp; |
| 825 | } |
| 826 | break; |
| 827 | case SkPorterDuff::kSrcIn_Mode: |
| 828 | if (SkBitmap::kRGB_565_Config == deviceConfig && |
| 829 | just_solid_color(paint)) { |
| 830 | return kSrcOver_XferInterp; |
| 831 | } |
| 832 | break; |
| 833 | case SkPorterDuff::kDstIn_Mode: |
| 834 | if (just_solid_color(paint)) { |
| 835 | return kSkipDrawing_XferInterp; |
| 836 | } |
| 837 | break; |
| 838 | default: |
| 839 | break; |
| 840 | } |
| 841 | } |
| 842 | return kNormal_XferInterp; |
| 843 | } |
| 844 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 845 | SkBlitter* SkBlitter::Choose(const SkBitmap& device, |
| 846 | const SkMatrix& matrix, |
| 847 | const SkPaint& paint, |
| 848 | void* storage, size_t storageSize) |
| 849 | { |
| 850 | SkASSERT(storageSize == 0 || storage != NULL); |
| 851 | |
| 852 | SkBlitter* blitter = NULL; |
| 853 | |
| 854 | // which check, in case we're being called by a client with a dummy device |
| 855 | // (e.g. they have a bounder that always aborts the draw) |
| 856 | if (SkBitmap::kNo_Config == device.getConfig()) |
| 857 | { |
| 858 | SK_PLACEMENT_NEW(blitter, SkNullBlitter, storage, storageSize); |
| 859 | return blitter; |
| 860 | } |
| 861 | |
| 862 | SkAutoRestoreShader restore(paint); |
| 863 | SkShader* shader = paint.getShader(); |
| 864 | |
| 865 | Sk3DShader* shader3D = NULL; |
| 866 | if (paint.getMaskFilter() != NULL && paint.getMaskFilter()->getFormat() == SkMask::k3D_Format) |
| 867 | { |
| 868 | shader3D = SkNEW_ARGS(Sk3DShader, (shader)); |
| 869 | ((SkPaint*)&paint)->setShader(shader3D)->unref(); |
| 870 | shader = shader3D; |
| 871 | } |
| 872 | |
| 873 | SkXfermode* mode = paint.getXfermode(); |
reed@android.com | d252db0 | 2009-04-01 18:31:44 +0000 | [diff] [blame] | 874 | if (NULL != mode) { |
| 875 | switch (interpret_xfermode(paint, mode, device.config())) { |
| 876 | case kSrcOver_XferInterp: |
| 877 | mode = NULL; |
| 878 | break; |
| 879 | case kSkipDrawing_XferInterp: |
| 880 | SK_PLACEMENT_NEW(blitter, SkNullBlitter, storage, storageSize); |
| 881 | return blitter; |
| 882 | default: |
| 883 | break; |
| 884 | } |
| 885 | } |
| 886 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 887 | if (NULL == shader && (NULL != mode || paint.getColorFilter() != NULL)) |
| 888 | { |
| 889 | // xfermodes require shaders for our current set of blitters |
| 890 | shader = SkNEW(SkColorShader); |
| 891 | ((SkPaint*)&paint)->setShader(shader)->unref(); |
| 892 | } |
| 893 | |
| 894 | if (paint.getColorFilter() != NULL) |
| 895 | { |
| 896 | SkASSERT(shader); |
| 897 | shader = SkNEW_ARGS(SkFilterShader, (shader, paint.getColorFilter())); |
| 898 | ((SkPaint*)&paint)->setShader(shader)->unref(); |
| 899 | } |
| 900 | |
| 901 | bool doDither = paint.isDither(); |
| 902 | |
| 903 | if (shader) |
| 904 | { |
| 905 | if (!shader->setContext(device, paint, matrix)) |
| 906 | return SkNEW(SkNullBlitter); |
| 907 | |
| 908 | // disable dither if our shader is natively 16bit (no need to upsample) |
| 909 | if (shader->getFlags() & SkShader::kIntrinsicly16_Flag) |
| 910 | doDither = false; |
| 911 | } |
| 912 | |
| 913 | switch (device.getConfig()) { |
| 914 | case SkBitmap::kA1_Config: |
| 915 | SK_PLACEMENT_NEW_ARGS(blitter, SkA1_Blitter, storage, storageSize, (device, paint)); |
| 916 | break; |
| 917 | |
| 918 | case SkBitmap::kA8_Config: |
| 919 | if (shader) |
| 920 | SK_PLACEMENT_NEW_ARGS(blitter, SkA8_Shader_Blitter, storage, storageSize, (device, paint)); |
| 921 | else |
| 922 | SK_PLACEMENT_NEW_ARGS(blitter, SkA8_Blitter, storage, storageSize, (device, paint)); |
| 923 | break; |
| 924 | |
| 925 | case SkBitmap::kARGB_4444_Config: |
| 926 | blitter = SkBlitter_ChooseD4444(device, paint, storage, storageSize); |
| 927 | break; |
| 928 | |
| 929 | case SkBitmap::kRGB_565_Config: |
| 930 | if (shader) |
| 931 | { |
| 932 | if (mode) |
| 933 | SK_PLACEMENT_NEW_ARGS(blitter, SkRGB16_Shader_Xfermode_Blitter, storage, storageSize, (device, paint)); |
| 934 | else if (SkShader::CanCallShadeSpan16(shader->getFlags()) && !doDither) |
| 935 | SK_PLACEMENT_NEW_ARGS(blitter, SkRGB16_Shader16_Blitter, storage, storageSize, (device, paint)); |
| 936 | else |
| 937 | 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^] | 938 | } else { |
| 939 | SkColor color = paint.getColor(); |
| 940 | if (0 == SkColorGetA(color)) { |
| 941 | SK_PLACEMENT_NEW(blitter, SkNullBlitter, storage, storageSize); |
| 942 | } else if (SK_ColorBLACK == color) { |
| 943 | SK_PLACEMENT_NEW_ARGS(blitter, SkRGB16_Black_Blitter, storage, |
| 944 | storageSize, (device, paint)); |
| 945 | } else if (0xFF == SkColorGetA(color)) { |
| 946 | SK_PLACEMENT_NEW_ARGS(blitter, SkRGB16_Opaque_Blitter, storage, |
| 947 | storageSize, (device, paint)); |
| 948 | } else { |
| 949 | SK_PLACEMENT_NEW_ARGS(blitter, SkRGB16_Blitter, storage, |
| 950 | storageSize, (device, paint)); |
| 951 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 952 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 953 | break; |
| 954 | |
| 955 | case SkBitmap::kARGB_8888_Config: |
| 956 | if (shader) |
| 957 | SK_PLACEMENT_NEW_ARGS(blitter, SkARGB32_Shader_Blitter, storage, storageSize, (device, paint)); |
| 958 | else if (paint.getColor() == SK_ColorBLACK) |
| 959 | SK_PLACEMENT_NEW_ARGS(blitter, SkARGB32_Black_Blitter, storage, storageSize, (device, paint)); |
| 960 | else if (paint.getAlpha() == 0xFF) |
| 961 | SK_PLACEMENT_NEW_ARGS(blitter, SkARGB32_Opaque_Blitter, storage, storageSize, (device, paint)); |
| 962 | else |
| 963 | SK_PLACEMENT_NEW_ARGS(blitter, SkARGB32_Blitter, storage, storageSize, (device, paint)); |
| 964 | break; |
| 965 | |
| 966 | default: |
| 967 | SkASSERT(!"unsupported device config"); |
| 968 | SK_PLACEMENT_NEW(blitter, SkNullBlitter, storage, storageSize); |
| 969 | } |
| 970 | |
| 971 | if (shader3D) |
| 972 | { |
| 973 | void (*proc)(void*) = ((void*)storage == (void*)blitter) ? destroy_blitter : delete_blitter; |
| 974 | SkAutoCallProc tmp(blitter, proc); |
| 975 | |
| 976 | blitter = SkNEW_ARGS(Sk3DBlitter, (blitter, shader3D, proc)); |
| 977 | (void)tmp.detach(); |
| 978 | } |
| 979 | return blitter; |
| 980 | } |
| 981 | |
| 982 | ////////////////////////////////////////////////////////////////////////////////////////////////////// |
| 983 | |
| 984 | const uint16_t gMask_0F0F = 0xF0F; |
| 985 | const uint32_t gMask_00FF00FF = 0xFF00FF; |
| 986 | |
| 987 | ////////////////////////////////////////////////////////////////////////////////////////////////////// |
| 988 | |
| 989 | SkShaderBlitter::SkShaderBlitter(const SkBitmap& device, const SkPaint& paint) |
reed@android.com | 5119bdb | 2009-06-12 21:27:03 +0000 | [diff] [blame] | 990 | : INHERITED(device) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 991 | fShader = paint.getShader(); |
| 992 | SkASSERT(fShader); |
| 993 | |
| 994 | fShader->ref(); |
| 995 | fShader->beginSession(); |
reed@android.com | 5119bdb | 2009-06-12 21:27:03 +0000 | [diff] [blame] | 996 | fShaderFlags = fShader->getFlags(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 997 | } |
| 998 | |
reed@android.com | 5119bdb | 2009-06-12 21:27:03 +0000 | [diff] [blame] | 999 | SkShaderBlitter::~SkShaderBlitter() { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1000 | fShader->endSession(); |
| 1001 | fShader->unref(); |
| 1002 | } |
| 1003 | |