1 /* 2 * PROJECT: Win32 subsystem 3 * LICENSE: See COPYING in the top level directory 4 * FILE: win32ss/gdi/dib/dib32bpp.c 5 * PURPOSE: Device Independant Bitmap functions, 32bpp 6 * PROGRAMMERS: Jason Filby 7 * Thomas Bluemel 8 * Gregor Anich 9 * Doug Lyons 10 */ 11 12 #include <win32k.h> 13 14 #define NDEBUG 15 #include <debug.h> 16 17 #define DEC_OR_INC(var, decTrue, amount) \ 18 ((var) = (decTrue) ? ((var) - (amount)) : ((var) + (amount))) 19 20 VOID 21 DIB_32BPP_PutPixel(SURFOBJ *SurfObj, LONG x, LONG y, ULONG c) 22 { 23 PBYTE byteaddr = (PBYTE)SurfObj->pvScan0 + y * SurfObj->lDelta; 24 PDWORD addr = (PDWORD)byteaddr + x; 25 26 *addr = c; 27 } 28 29 ULONG 30 DIB_32BPP_GetPixel(SURFOBJ *SurfObj, LONG x, LONG y) 31 { 32 PBYTE byteaddr = (PBYTE)SurfObj->pvScan0 + y * SurfObj->lDelta; 33 PDWORD addr = (PDWORD)byteaddr + x; 34 35 return (ULONG)(*addr); 36 } 37 38 VOID 39 DIB_32BPP_VLine(SURFOBJ *SurfObj, LONG x, LONG y1, LONG y2, ULONG c) 40 { 41 PBYTE byteaddr = (PBYTE)SurfObj->pvScan0 + y1 * SurfObj->lDelta; 42 PDWORD addr = (PDWORD)byteaddr + x; 43 LONG lDelta = SurfObj->lDelta >> 2; // >> 2 == / sizeof(DWORD) 44 45 byteaddr = (PBYTE)addr; 46 while (y1++ < y2) 47 { 48 *addr = (DWORD)c; 49 addr += lDelta; 50 } 51 } 52 53 BOOLEAN 54 DIB_32BPP_BitBltSrcCopy(PBLTINFO BltInfo) 55 { 56 LONG i, j, sx, sy, xColor, f1; 57 PBYTE SourceBits, DestBits, SourceLine, DestLine; 58 PBYTE SourceBitsT, SourceBitsB, DestBitsT, DestBitsB; 59 PBYTE SourceBits_4BPP, SourceLine_4BPP; 60 PDWORD Source32, Dest32; 61 DWORD Index, DestWidth, DestHeight; 62 BOOLEAN bTopToBottom, bLeftToRight; 63 BOOLEAN blDeltaSrcNeg, blDeltaDestNeg; 64 BOOLEAN blDeltaAdjustDone = FALSE; 65 66 DPRINT("DIB_32BPP_BitBltSrcCopy: SourcePoint (%d, %d), SourceSurface cx/cy (%d/%d), " 67 "DestSurface cx/cy (%d/%d) DestRect: (%d,%d)-(%d,%d)\n", 68 BltInfo->SourcePoint.x, BltInfo->SourcePoint.y, 69 BltInfo->SourceSurface->sizlBitmap.cx, BltInfo->SourceSurface->sizlBitmap.cy, 70 BltInfo->DestSurface->sizlBitmap.cx, BltInfo->DestSurface->sizlBitmap.cy, 71 BltInfo->DestRect.left, BltInfo->DestRect.top, BltInfo->DestRect.right, BltInfo->DestRect.bottom); 72 73 DPRINT("BltInfo->DestSurface->lDelta is '%d' and BltInfo->SourceSurface->lDelta is '%d'.\n", 74 BltInfo->DestSurface->lDelta, BltInfo->SourceSurface->lDelta); 75 76 DPRINT("iBitmapFormat is %d and width,height is (%d,%d).\n", BltInfo->SourceSurface->iBitmapFormat, 77 BltInfo->DestRect.right - BltInfo->DestRect.left, BltInfo->DestRect.bottom - BltInfo->DestRect.top); 78 79 DPRINT("BltInfo->SourcePoint.x is '%d' and BltInfo->SourcePoint.y is '%d'.\n", 80 BltInfo->SourcePoint.x, BltInfo->SourcePoint.y); 81 82 /* Do not deal with negative numbers for these values */ 83 if ((BltInfo->DestRect.left < 0) || (BltInfo->DestRect.top < 0) || 84 (BltInfo->DestRect.right < 0) || (BltInfo->DestRect.bottom < 0)) 85 return FALSE; 86 87 /* Detect negative lDelta's meaning Bottom-Up bitmaps */ 88 blDeltaSrcNeg = BltInfo->SourceSurface->lDelta < 0; 89 blDeltaDestNeg = BltInfo->DestSurface->lDelta < 0; 90 91 /* Get back left to right flip here */ 92 bLeftToRight = BltInfo->DestRect.left > BltInfo->DestRect.right; 93 94 /* Check for top to bottom flip needed. */ 95 bTopToBottom = BltInfo->DestRect.top > BltInfo->DestRect.bottom; 96 97 DPRINT("bTopToBottom is '%d' and DestSurface->lDelta < 0 is '%d' and SourceSurface->lDelta < 0 is '%d'.\n", 98 bTopToBottom, BltInfo->DestSurface->lDelta < 0 ? 1 : 0, BltInfo->SourceSurface->lDelta < 0 ? 1 : 0); 99 100 /* Make WellOrdered with top < bottom and left < right */ 101 RECTL_vMakeWellOrdered(&BltInfo->DestRect); 102 103 DestWidth = BltInfo->DestRect.right - BltInfo->DestRect.left; 104 DestHeight = BltInfo->DestRect.bottom - BltInfo->DestRect.top; 105 106 DestBits = (PBYTE)BltInfo->DestSurface->pvScan0 107 + (BltInfo->DestRect.top * BltInfo->DestSurface->lDelta) 108 + 4 * BltInfo->DestRect.left; 109 110 DPRINT("iBitmapFormat is %d and width,height is (%d,%d).\n", BltInfo->SourceSurface->iBitmapFormat, 111 DestWidth, DestHeight); 112 113 switch (BltInfo->SourceSurface->iBitmapFormat) 114 { 115 case BMF_1BPP: 116 DPRINT("1BPP Case Selected with DestRect Width of '%d'.\n", 117 DestWidth); 118 119 if (bLeftToRight || bTopToBottom) 120 DPRINT("bLeftToRight is '%d' and bTopToBottom is '%d'.\n", bLeftToRight, bTopToBottom); 121 122 sx = BltInfo->SourcePoint.x; 123 124 /* This sets sy to the top line */ 125 sy = BltInfo->SourcePoint.y; 126 127 if (bTopToBottom) 128 { 129 /* This sets sy to the bottom line */ 130 sy += BltInfo->SourceSurface->lDelta * (DestHeight - 1); 131 } 132 133 for (j=BltInfo->DestRect.top; j<BltInfo->DestRect.bottom; j++) 134 { 135 sx = BltInfo->SourcePoint.x; 136 137 if (bLeftToRight) 138 { 139 /* This sets the sx to the rightmost pixel */ 140 sx += (DestWidth - 1); 141 } 142 143 for (i = BltInfo->DestRect.left; i < BltInfo->DestRect.right; i++) 144 { 145 if (DIB_1BPP_GetPixel(BltInfo->SourceSurface, sx, sy) == 0) 146 { 147 DIB_32BPP_PutPixel(BltInfo->DestSurface, i, j, XLATEOBJ_iXlate(BltInfo->XlateSourceToDest, 0)); 148 } 149 else 150 { 151 DIB_32BPP_PutPixel(BltInfo->DestSurface, i, j, XLATEOBJ_iXlate(BltInfo->XlateSourceToDest, 1)); 152 } 153 154 DEC_OR_INC(sx, bLeftToRight, 1); 155 } 156 DEC_OR_INC(sy, bTopToBottom, 1); 157 } 158 break; 159 160 case BMF_4BPP: 161 DPRINT("4BPP Case Selected with DestRect Width of '%d'.\n", 162 DestWidth); 163 164 if (bLeftToRight || bTopToBottom) 165 DPRINT("bLeftToRight is '%d' and bTopToBottom is '%d'.\n", bLeftToRight, bTopToBottom); 166 167 /* This sets SourceBits_4BPP to the top line */ 168 SourceBits_4BPP = (PBYTE)BltInfo->SourceSurface->pvScan0 169 + (BltInfo->SourcePoint.y * BltInfo->SourceSurface->lDelta) 170 + (BltInfo->SourcePoint.x >> 1); 171 172 if (bTopToBottom) 173 { 174 /* This sets SourceBits_4BPP to the bottom line */ 175 SourceBits_4BPP += BltInfo->SourceSurface->lDelta * (DestHeight - 1); 176 } 177 178 for (j=BltInfo->DestRect.top; j<BltInfo->DestRect.bottom; j++) 179 { 180 SourceLine_4BPP = SourceBits_4BPP; 181 sx = BltInfo->SourcePoint.x; 182 183 if (bLeftToRight) 184 { 185 /* This sets sx to the rightmost pixel */ 186 sx += (DestWidth - 1); 187 } 188 189 f1 = sx & 1; 190 191 for (i=BltInfo->DestRect.left; i<BltInfo->DestRect.right; i++) 192 { 193 xColor = XLATEOBJ_iXlate(BltInfo->XlateSourceToDest, 194 (*SourceLine_4BPP & altnotmask[f1]) >> (4 * (1 - f1))); 195 DIB_32BPP_PutPixel(BltInfo->DestSurface, i, j, xColor); 196 if (f1 == 1) { 197 DEC_OR_INC(SourceLine_4BPP, bLeftToRight, 1); 198 f1 = 0; 199 } else { 200 f1 = 1; 201 } 202 DEC_OR_INC(sx, bLeftToRight, 1); 203 } 204 DEC_OR_INC(SourceBits_4BPP, bTopToBottom, BltInfo->SourceSurface->lDelta); 205 } 206 break; 207 208 case BMF_8BPP: 209 DPRINT("8BPP Case Selected with DestRect Width of '%d'.\n", 210 DestWidth); 211 212 if (bLeftToRight || bTopToBottom) 213 DPRINT("bLeftToRight is '%d' and bTopToBottom is '%d'.\n", bLeftToRight, bTopToBottom); 214 215 /* This sets SourceLine to the top line */ 216 SourceLine = (PBYTE)BltInfo->SourceSurface->pvScan0 217 + (BltInfo->SourcePoint.y * BltInfo->SourceSurface->lDelta) 218 + BltInfo->SourcePoint.x; 219 DestLine = DestBits; 220 221 if (bTopToBottom) 222 { 223 /* This sets SourceLine to the bottom line */ 224 SourceLine += BltInfo->SourceSurface->lDelta * (DestHeight - 1); 225 } 226 227 for (j = BltInfo->DestRect.top; j < BltInfo->DestRect.bottom; j++) 228 { 229 SourceBits = SourceLine; 230 DestBits = DestLine; 231 232 if (bLeftToRight) 233 { 234 /* This sets the SourceBits to the rightmost pixel */ 235 SourceBits += (DestWidth - 1); 236 } 237 238 for (i = BltInfo->DestRect.left; i < BltInfo->DestRect.right; i++) 239 { 240 xColor = *SourceBits; 241 *((PDWORD) DestBits) = (DWORD)XLATEOBJ_iXlate(BltInfo->XlateSourceToDest, xColor); 242 DEC_OR_INC(SourceBits, bLeftToRight, 1); 243 DestBits += 4; 244 } 245 DEC_OR_INC(SourceLine, bTopToBottom, BltInfo->SourceSurface->lDelta); 246 DestLine += BltInfo->DestSurface->lDelta; 247 } 248 break; 249 250 case BMF_16BPP: 251 DPRINT("16BPP Case Selected with DestRect Width of '%d'.\n", 252 DestWidth); 253 254 if (bLeftToRight || bTopToBottom) 255 DPRINT("bLeftToRight is '%d' and bTopToBottom is '%d'.\n", bLeftToRight, bTopToBottom); 256 257 /* This sets SourceLine to the top line */ 258 SourceLine = (PBYTE)BltInfo->SourceSurface->pvScan0 259 + (BltInfo->SourcePoint.y * BltInfo->SourceSurface->lDelta) 260 + 2 * BltInfo->SourcePoint.x; 261 DestLine = DestBits; 262 263 if (bTopToBottom) 264 { 265 /* This sets SourceLine to the bottom line */ 266 SourceLine += BltInfo->SourceSurface->lDelta * (DestHeight - 1); 267 } 268 269 for (j = BltInfo->DestRect.top; j < BltInfo->DestRect.bottom; j++) 270 { 271 SourceBits = SourceLine; 272 DestBits = DestLine; 273 274 if (bLeftToRight) 275 { 276 /* This sets the SourceBits to the rightmost pixel */ 277 SourceBits += (DestWidth - 1) * 2; 278 } 279 280 for (i = BltInfo->DestRect.left; i < BltInfo->DestRect.right; i++) 281 { 282 xColor = *((PWORD) SourceBits); 283 *((PDWORD) DestBits) = (DWORD)XLATEOBJ_iXlate(BltInfo->XlateSourceToDest, xColor); 284 DEC_OR_INC(SourceBits, bLeftToRight, 2); 285 DestBits += 4; 286 } 287 288 DEC_OR_INC(SourceLine, bTopToBottom, BltInfo->SourceSurface->lDelta); 289 DestLine += BltInfo->DestSurface->lDelta; 290 } 291 break; 292 293 case BMF_24BPP: 294 DPRINT("24BPP Case Selected with DestRect Width of '%d'.\n", 295 DestWidth); 296 297 if (bLeftToRight || bTopToBottom) 298 DPRINT("bLeftToRight is '%d' and bTopToBottom is '%d'.\n", bLeftToRight, bTopToBottom); 299 300 /* This sets SourceLine to the top line */ 301 SourceLine = (PBYTE)BltInfo->SourceSurface->pvScan0 302 + (BltInfo->SourcePoint.y * BltInfo->SourceSurface->lDelta) 303 + 3 * BltInfo->SourcePoint.x; 304 305 if (bTopToBottom) 306 { 307 /* This sets SourceLine to the bottom line */ 308 SourceLine += BltInfo->SourceSurface->lDelta * (DestHeight - 1); 309 } 310 311 DestLine = DestBits; 312 313 for (j = BltInfo->DestRect.top; j < BltInfo->DestRect.bottom; j++) 314 { 315 SourceBits = SourceLine; 316 DestBits = DestLine; 317 318 if (bLeftToRight) 319 { 320 /* This sets the SourceBits to the rightmost pixel */ 321 SourceBits += (DestWidth - 1) * 3; 322 } 323 324 for (i = BltInfo->DestRect.left; i < BltInfo->DestRect.right; i++) 325 { 326 xColor = (*(SourceBits + 2) << 0x10) + 327 (*(SourceBits + 1) << 0x08) + 328 (*(SourceBits)); 329 *((PDWORD)DestBits) = (DWORD)XLATEOBJ_iXlate(BltInfo->XlateSourceToDest, xColor); 330 DEC_OR_INC(SourceBits, bLeftToRight, 3); 331 DestBits += 4; 332 } 333 334 DEC_OR_INC(SourceLine, bTopToBottom, BltInfo->SourceSurface->lDelta); 335 DestLine += BltInfo->DestSurface->lDelta; 336 } 337 break; 338 339 case BMF_32BPP: 340 DPRINT("32BPP Case Selected with SourcePoint (%d,%d) and DestRect Width/height of '%d/%d' DestRect: (%d,%d)-(%d,%d).\n", 341 BltInfo->SourcePoint.x, BltInfo->SourcePoint.y, DestWidth, DestHeight, 342 BltInfo->DestRect.left, BltInfo->DestRect.top, BltInfo->DestRect.right, BltInfo->DestRect.bottom); 343 344 if (bLeftToRight || bTopToBottom) 345 DPRINT("bLeftToRight is '%d' and bTopToBottom is '%d'.\n", bLeftToRight, bTopToBottom); 346 347 /* This handles the negative lDelta's which represent Top-to-Bottom bitmaps */ 348 if (((blDeltaSrcNeg || blDeltaDestNeg) && !(blDeltaSrcNeg && blDeltaDestNeg)) && bTopToBottom) 349 { 350 DPRINT("Adjusting for lDelta's here.\n"); 351 if (BltInfo->DestRect.top < BltInfo->SourcePoint.y) 352 { 353 /* SourceBits points to top-left pixel for lDelta < 0 and bottom-left for lDelta > 0 */ 354 SourceBits = (PBYTE)BltInfo->SourceSurface->pvScan0 355 + (BltInfo->SourcePoint.y * BltInfo->SourceSurface->lDelta) 356 + 4 * BltInfo->SourcePoint.x; 357 for (j = BltInfo->DestRect.top; j < BltInfo->DestRect.bottom; j++) 358 { 359 RtlMoveMemory(DestBits, SourceBits, 4 * DestWidth); 360 SourceBits += BltInfo->SourceSurface->lDelta; 361 DestBits += BltInfo->DestSurface->lDelta; 362 } 363 } 364 else 365 { 366 /* SourceBits points to bottom-left pixel for lDelta < 0 and top-left for lDelta > 0 */ 367 SourceBits = (PBYTE)BltInfo->SourceSurface->pvScan0 368 + ((BltInfo->SourcePoint.y 369 + DestHeight - 1) * BltInfo->SourceSurface->lDelta) 370 + 4 * BltInfo->SourcePoint.x; 371 /* SourceBits points to bottom-left pixel for lDelta < 0 and top-left for lDelta > 0 */ 372 DestBits = (PBYTE)BltInfo->DestSurface->pvScan0 373 + ((BltInfo->DestRect.bottom - 1) * BltInfo->DestSurface->lDelta) 374 + 4 * BltInfo->DestRect.left; 375 for (j = BltInfo->DestRect.bottom - 1; BltInfo->DestRect.top <= j; j--) 376 { 377 RtlMoveMemory(DestBits, SourceBits, 4 * DestWidth); 378 SourceBits -= BltInfo->SourceSurface->lDelta; 379 DestBits -= BltInfo->DestSurface->lDelta; 380 } 381 } 382 blDeltaAdjustDone = TRUE; 383 } 384 385 /* This tests for whether we can use simplified/quicker code below. 386 * It works for increasing source and destination areas only and there is no overlap and no flip. 387 */ 388 if ((BltInfo->XlateSourceToDest == NULL || 389 (BltInfo->XlateSourceToDest->flXlate & XO_TRIVIAL) != 0) && 390 (!bTopToBottom && !bLeftToRight)) 391 { 392 DPRINT("XO_TRIVIAL is TRUE.\n"); 393 394 if (BltInfo->DestRect.top < BltInfo->SourcePoint.y) 395 { 396 /* SourceBits points to top-left pixel for lDelta < 0 and bottom-left for lDelta > 0 */ 397 SourceBits = (PBYTE)BltInfo->SourceSurface->pvScan0 398 + (BltInfo->SourcePoint.y * BltInfo->SourceSurface->lDelta) 399 + 4 * BltInfo->SourcePoint.x; 400 for (j = BltInfo->DestRect.top; j < BltInfo->DestRect.bottom; j++) 401 { 402 RtlMoveMemory(DestBits, SourceBits, 4 * DestWidth); 403 SourceBits += BltInfo->SourceSurface->lDelta; 404 DestBits += BltInfo->DestSurface->lDelta; 405 } 406 } 407 else 408 { 409 /* SourceBits points to bottom-left pixel for lDelta < 0 and top-left for lDelta > 0 */ 410 SourceBits = (PBYTE)BltInfo->SourceSurface->pvScan0 411 + ((BltInfo->SourcePoint.y 412 + DestHeight - 1) * BltInfo->SourceSurface->lDelta) 413 + 4 * BltInfo->SourcePoint.x; 414 /* SourceBits points to bottom-left pixel for lDelta < 0 and top-left for lDelta > 0 */ 415 DestBits = (PBYTE)BltInfo->DestSurface->pvScan0 416 + ((BltInfo->DestRect.bottom - 1) * BltInfo->DestSurface->lDelta) 417 + 4 * BltInfo->DestRect.left; 418 for (j = BltInfo->DestRect.bottom - 1; BltInfo->DestRect.top <= j; j--) 419 { 420 RtlMoveMemory(DestBits, SourceBits, 4 * DestWidth); 421 SourceBits -= BltInfo->SourceSurface->lDelta; 422 DestBits -= BltInfo->DestSurface->lDelta; 423 } 424 } 425 } 426 else 427 { 428 DPRINT("XO_TRIVIAL is NOT TRUE.\n"); 429 430 if (!bTopToBottom && !bLeftToRight) 431 { 432 if (BltInfo->DestRect.top < BltInfo->SourcePoint.y) 433 { 434 SourceBits = ((PBYTE)BltInfo->SourceSurface->pvScan0 435 + (BltInfo->SourcePoint.y * BltInfo->SourceSurface->lDelta) 436 + 4 * BltInfo->SourcePoint.x); 437 for (j = BltInfo->DestRect.top; j < BltInfo->DestRect.bottom; j++) 438 { 439 if (BltInfo->DestRect.left < BltInfo->SourcePoint.x) 440 { 441 Dest32 = (DWORD *) DestBits; 442 Source32 = (DWORD *) SourceBits; 443 for (i = BltInfo->DestRect.left; i < BltInfo->DestRect.right; i++) 444 { 445 *Dest32++ = XLATEOBJ_iXlate(BltInfo->XlateSourceToDest, *Source32++); 446 } 447 } 448 else 449 { 450 Dest32 = (DWORD *) DestBits + (DestWidth - 1); 451 Source32 = (DWORD *) SourceBits + (DestWidth - 1); 452 for (i = BltInfo->DestRect.right - 1; BltInfo->DestRect.left <= i; i--) 453 { 454 *Dest32-- = XLATEOBJ_iXlate(BltInfo->XlateSourceToDest, *Source32--); 455 } 456 } 457 SourceBits += BltInfo->SourceSurface->lDelta; 458 DestBits += BltInfo->DestSurface->lDelta; 459 } 460 } 461 else 462 { 463 SourceBits = (PBYTE)BltInfo->SourceSurface->pvScan0 464 + ((BltInfo->SourcePoint.y 465 + DestHeight - 1) * BltInfo->SourceSurface->lDelta) 466 + 4 * BltInfo->SourcePoint.x; 467 DestBits = (PBYTE)BltInfo->DestSurface->pvScan0 468 + ((BltInfo->DestRect.bottom - 1) * BltInfo->DestSurface->lDelta) 469 + 4 * BltInfo->DestRect.left; 470 for (j = BltInfo->DestRect.bottom - 1; BltInfo->DestRect.top <= j; j--) 471 { 472 if (BltInfo->DestRect.left < BltInfo->SourcePoint.x) 473 { 474 Dest32 = (DWORD *) DestBits; 475 Source32 = (DWORD *) SourceBits; 476 for (i = BltInfo->DestRect.left; i < BltInfo->DestRect.right; i++) 477 { 478 *Dest32++ = XLATEOBJ_iXlate(BltInfo->XlateSourceToDest, *Source32++); 479 } 480 } 481 else 482 { 483 Dest32 = (DWORD *) DestBits + (DestWidth - 1); 484 Source32 = (DWORD *) SourceBits + (DestWidth - 1); 485 for (i = BltInfo->DestRect.right - 1; BltInfo->DestRect.left <= i; i--) 486 { 487 *Dest32-- = XLATEOBJ_iXlate(BltInfo->XlateSourceToDest, *Source32--); 488 } 489 } 490 SourceBits -= BltInfo->SourceSurface->lDelta; 491 DestBits -= BltInfo->DestSurface->lDelta; 492 } 493 } 494 } 495 else 496 { 497 /* Buffering for source and destination flip overlaps. Fixes KHMZ MirrorTest CORE-16642 */ 498 BOOL TopToBottomDone = FALSE; 499 500 /* No need to flip a LeftToRight bitmap only one pixel wide */ 501 if ((bLeftToRight) && (DestWidth > 1)) 502 { 503 DPRINT("Flip is bLeftToRight.\n"); 504 505 /* Allocate enough pixels for a row in DWORD's */ 506 DWORD *store = ExAllocatePoolWithTag(NonPagedPool, 507 (DestWidth + 1) * 4, TAG_DIB); 508 if (store == NULL) 509 { 510 DPRINT1("Storage Allocation Failed.\n"); 511 return FALSE; 512 } 513 514 /* This sets SourceBits to the bottom line */ 515 SourceBits = (PBYTE)BltInfo->SourceSurface->pvScan0 516 + ((BltInfo->SourcePoint.y + DestHeight - 1) 517 * BltInfo->SourceSurface->lDelta) + 4 * BltInfo->SourcePoint.x; 518 519 /* This sets DestBits to the bottom line */ 520 DestBits = (PBYTE)BltInfo->DestSurface->pvScan0 521 + (BltInfo->DestRect.bottom - 1) * BltInfo->DestSurface->lDelta 522 + 4 * BltInfo->DestRect.left; 523 524 for (j = BltInfo->DestRect.bottom - 1; BltInfo->DestRect.top <= j; j--) 525 { 526 527 /* Set Dest32 to right pixel */ 528 Dest32 = (DWORD *) DestBits + (DestWidth - 1); 529 Source32 = (DWORD *) SourceBits; 530 531 Index = 0; 532 533 /* Store pixels from left to right */ 534 for (i = BltInfo->DestRect.right - 1; BltInfo->DestRect.left <= i; i--) 535 { 536 store[Index] = *Source32++; 537 Index++; 538 } 539 540 Index = 0; 541 542 /* Copy stored dat to pixels from right to left */ 543 for (i = BltInfo->DestRect.right - 1; BltInfo->DestRect.left <= i; i--) 544 { 545 *Dest32-- = store[Index]; 546 Index++; 547 } 548 SourceBits -= BltInfo->SourceSurface->lDelta; 549 DestBits -= BltInfo->DestSurface->lDelta; 550 } 551 ExFreePoolWithTag(store, TAG_DIB); 552 TopToBottomDone = TRUE; 553 } 554 555 /* Top to Botoom Handling if bitmap more than one pixel high */ 556 if ((bTopToBottom) && (DestHeight > 1)) 557 { 558 /* Note: It is very important that this code remain optimized for time used. 559 * Otherwise you will have random crashes in ReactOS that are undesirable. 560 * For an example of this just try executing the code here two times. 561 */ 562 563 DPRINT("Flip is bTopToBottom.\n"); 564 565 /* Allocate enough pixels for a row in DWORD's */ 566 DWORD *store = ExAllocatePoolWithTag(NonPagedPool, 567 (DestWidth + 1) * 4, TAG_DIB); 568 if (store == NULL) 569 { 570 DPRINT1("Storage Allocation Failed.\n"); 571 return FALSE; 572 } 573 574 /* This set DestBitsT to the top line */ 575 DestBitsT = (PBYTE)BltInfo->DestSurface->pvScan0 576 + ((BltInfo->DestRect.top) * BltInfo->DestSurface->lDelta) 577 + 4 * BltInfo->DestRect.left; 578 579 /* This sets DestBitsB to the bottom line */ 580 DestBitsB = (PBYTE)BltInfo->DestSurface->pvScan0 581 + (BltInfo->DestRect.bottom - 1) * BltInfo->DestSurface->lDelta 582 + 4 * BltInfo->DestRect.left; 583 584 /* The TopToBottomDone flag indicates that we are flipping for bTopToBottom and bLeftToRight 585 * and have already completed the bLeftToRight. So we will lose our first flip output 586 * unless we work with its output which is at the destination site. So in this case 587 * our new Source becomes the previous outputs Destination. 588 * Also in we use the same logic when we have corrected for negative lDelta's above 589 * and already completed a flip from Source to Destination for the first step 590 */ 591 592 if (TopToBottomDone || blDeltaAdjustDone) 593 { 594 /* This sets SourceBitsB to the bottom line */ 595 SourceBitsB = DestBitsB; 596 597 /* This sets SourceBitsT to the top line */ 598 SourceBitsT = DestBitsT; 599 } 600 else 601 { 602 /* This sets SourceBitsB to the bottom line */ 603 SourceBitsB = (PBYTE)BltInfo->SourceSurface->pvScan0 604 + ((BltInfo->SourcePoint.y + DestHeight - 1) 605 * BltInfo->SourceSurface->lDelta) + 4 * BltInfo->SourcePoint.x; 606 607 /* This sets SourceBitsT to the top line */ 608 SourceBitsT = (PBYTE)BltInfo->SourceSurface->pvScan0 609 + (BltInfo->SourcePoint.y * BltInfo->SourceSurface->lDelta) + 4 * BltInfo->SourcePoint.x; 610 } 611 612 /* Overlaps and Vertical flips do not mix well. So we test for this and handle it 613 * by using two operations. First we just do a copy of the source to the destination. 614 * Then we do a flip in place at the destination location and we are done. 615 */ 616 if ((BltInfo->SourcePoint.y != BltInfo->DestRect.top) && // The values are not equal and 617 (abs(BltInfo->SourcePoint.y - BltInfo->DestRect.top) < (DestHeight + 2)) && // they are NOT seperated by > DestHeight 618 (BltInfo->SourceSurface->pvScan0 == BltInfo->DestSurface->pvScan0)) // and same surface (probably screen) 619 { 620 DPRINT("Flips Need Adjustments, so do move here.\n"); 621 622 if (BltInfo->DestRect.top < BltInfo->SourcePoint.y) 623 { 624 /* SourceBits points to top-left pixel for lDelta < 0 and bottom-left for lDelta > 0 */ 625 SourceBits = (PBYTE)BltInfo->SourceSurface->pvScan0 626 + (BltInfo->SourcePoint.y * BltInfo->SourceSurface->lDelta) 627 + 4 * BltInfo->SourcePoint.x; 628 for (j = BltInfo->DestRect.top; j < BltInfo->DestRect.bottom; j++) 629 { 630 RtlMoveMemory(DestBits, SourceBits, 4 * DestWidth); 631 SourceBits += BltInfo->SourceSurface->lDelta; 632 DestBits += BltInfo->DestSurface->lDelta; 633 } 634 } 635 else 636 { 637 /* SourceBits points to bottom-left pixel for lDelta < 0 and top-left for lDelta > 0 */ 638 SourceBits = (PBYTE)BltInfo->SourceSurface->pvScan0 639 + ((BltInfo->SourcePoint.y 640 + DestHeight - 1) * BltInfo->SourceSurface->lDelta) 641 + 4 * BltInfo->SourcePoint.x; 642 /* SourceBits points to bottom-left pixel for lDelta < 0 and top-left for lDelta > 0 */ 643 DestBits = (PBYTE)BltInfo->DestSurface->pvScan0 644 + ((BltInfo->DestRect.bottom - 1) * BltInfo->DestSurface->lDelta) 645 + 4 * BltInfo->DestRect.left; 646 for (j = BltInfo->DestRect.bottom - 1; BltInfo->DestRect.top <= j; j--) 647 { 648 RtlMoveMemory(DestBits, SourceBits, 4 * DestWidth); 649 SourceBits -= BltInfo->SourceSurface->lDelta; 650 DestBits -= BltInfo->DestSurface->lDelta; 651 } 652 } 653 654 /* This sets SourceBitsB to the bottom line */ 655 SourceBitsB = DestBitsB; 656 657 /* This sets SourceBitsT to the top line */ 658 SourceBitsT = DestBitsT; 659 } 660 661 /* Vertical Flip code starts here */ 662 for (j = 0; j < DestHeight / 2 ; j++) 663 { 664 /* Store bottom row of Source pixels */ 665 RtlMoveMemory(store, SourceBitsB, 4 * DestWidth); 666 667 /* Copy top Source row to bottom Destination row overwriting it */ 668 RtlMoveMemory(DestBitsB, SourceBitsT, 4 * DestWidth); 669 670 /* Copy stored bottom row of Source pixels to Destination top row of pixels */ 671 RtlMoveMemory(DestBitsT, store, 4 * DestWidth); 672 673 /* Index top rows down and bottom rows up */ 674 SourceBitsT += BltInfo->SourceSurface->lDelta; 675 SourceBitsB -= BltInfo->SourceSurface->lDelta; 676 677 DestBitsT += BltInfo->DestSurface->lDelta; 678 DestBitsB -= BltInfo->DestSurface->lDelta; 679 } 680 if (DestHeight % 2) 681 { 682 /* If we had an odd number of lines we handle the center one here */ 683 DPRINT("Handling Top To Bottom with Odd Number of lines.\n"); 684 RtlMoveMemory(DestBitsB, SourceBitsT, 4 * DestWidth); 685 } 686 ExFreePoolWithTag(store, TAG_DIB); 687 } 688 } 689 } 690 break; 691 692 default: 693 DPRINT1("DIB_32BPP_BitBltSrcCopy: Unhandled Source BPP: %u\n", BitsPerFormat(BltInfo->SourceSurface->iBitmapFormat)); 694 return FALSE; 695 } 696 697 return TRUE; 698 } 699 700 BOOLEAN 701 DIB_32BPP_TransparentBlt(SURFOBJ *DestSurf, SURFOBJ *SourceSurf, 702 RECTL* DestRect, RECTL *SourceRect, 703 XLATEOBJ *ColorTranslation, ULONG iTransColor) 704 { 705 LONG X, Y, SourceX, SourceY = 0, wd; 706 ULONG *DestBits, Source = 0; 707 708 LONG DstHeight; 709 LONG DstWidth; 710 LONG SrcHeight; 711 LONG SrcWidth; 712 713 DstHeight = DestRect->bottom - DestRect->top; 714 DstWidth = DestRect->right - DestRect->left; 715 SrcHeight = SourceRect->bottom - SourceRect->top; 716 SrcWidth = SourceRect->right - SourceRect->left; 717 718 DestBits = (ULONG*)((PBYTE)DestSurf->pvScan0 + 719 (DestRect->left << 2) + 720 DestRect->top * DestSurf->lDelta); 721 wd = DestSurf->lDelta - ((DestRect->right - DestRect->left) << 2); 722 723 for (Y = DestRect->top; Y < DestRect->bottom; Y++) 724 { 725 SourceY = SourceRect->top+(Y - DestRect->top) * SrcHeight / DstHeight; 726 for (X = DestRect->left; X < DestRect->right; X++, DestBits++) 727 { 728 SourceX = SourceRect->left+(X - DestRect->left) * SrcWidth / DstWidth; 729 if (SourceX >= 0 && SourceY >= 0 && 730 SourceSurf->sizlBitmap.cx > SourceX && SourceSurf->sizlBitmap.cy > SourceY) 731 { 732 Source = DIB_GetSourceIndex(SourceSurf, SourceX, SourceY); 733 if ((0x00FFFFFF & Source) != (0x00FFFFFF & iTransColor)) 734 { 735 *DestBits = XLATEOBJ_iXlate(ColorTranslation, Source); 736 } 737 } 738 } 739 740 DestBits = (ULONG*)((ULONG_PTR)DestBits + wd); 741 } 742 743 return TRUE; 744 } 745 746 typedef union { 747 ULONG ul; 748 struct { 749 UCHAR red; 750 UCHAR green; 751 UCHAR blue; 752 UCHAR alpha; 753 } col; 754 } NICEPIXEL32; 755 756 static __inline UCHAR 757 Clamp8(ULONG val) 758 { 759 return (val > 255) ? 255 : (UCHAR)val; 760 } 761 762 BOOLEAN 763 DIB_32BPP_AlphaBlend(SURFOBJ* Dest, SURFOBJ* Source, RECTL* DestRect, 764 RECTL* SourceRect, CLIPOBJ* ClipRegion, 765 XLATEOBJ* ColorTranslation, BLENDOBJ* BlendObj) 766 { 767 INT Rows, Cols, SrcX, SrcY; 768 register PULONG Dst; 769 BLENDFUNCTION BlendFunc; 770 register NICEPIXEL32 DstPixel, SrcPixel; 771 UCHAR Alpha, SrcBpp; 772 773 DPRINT("DIB_32BPP_AlphaBlend: SourceRect: (%d,%d)-(%d,%d), DestRect: (%d,%d)-(%d,%d)\n", 774 SourceRect->left, SourceRect->top, SourceRect->right, SourceRect->bottom, 775 DestRect->left, DestRect->top, DestRect->right, DestRect->bottom); 776 777 BlendFunc = BlendObj->BlendFunction; 778 if (BlendFunc.BlendOp != AC_SRC_OVER) 779 { 780 DPRINT1("BlendOp != AC_SRC_OVER\n"); 781 return FALSE; 782 } 783 if (BlendFunc.BlendFlags != 0) 784 { 785 DPRINT1("BlendFlags != 0\n"); 786 return FALSE; 787 } 788 if ((BlendFunc.AlphaFormat & ~AC_SRC_ALPHA) != 0) 789 { 790 DPRINT1("Unsupported AlphaFormat (0x%x)\n", BlendFunc.AlphaFormat); 791 return FALSE; 792 } 793 if ((BlendFunc.AlphaFormat & AC_SRC_ALPHA) != 0 && 794 BitsPerFormat(Source->iBitmapFormat) != 32) 795 { 796 DPRINT1("Source bitmap must be 32bpp when AC_SRC_ALPHA is set\n"); 797 return FALSE; 798 } 799 800 Dst = (PULONG)((ULONG_PTR)Dest->pvScan0 + (DestRect->top * Dest->lDelta) + 801 (DestRect->left << 2)); 802 SrcBpp = BitsPerFormat(Source->iBitmapFormat); 803 804 Rows = 0; 805 SrcY = SourceRect->top; 806 while (++Rows <= DestRect->bottom - DestRect->top) 807 { 808 Cols = 0; 809 SrcX = SourceRect->left; 810 while (++Cols <= DestRect->right - DestRect->left) 811 { 812 SrcPixel.ul = DIB_GetSource(Source, SrcX, SrcY, ColorTranslation); 813 SrcPixel.col.red = (SrcPixel.col.red * BlendFunc.SourceConstantAlpha) / 255; 814 SrcPixel.col.green = (SrcPixel.col.green * BlendFunc.SourceConstantAlpha) / 255; 815 SrcPixel.col.blue = (SrcPixel.col.blue * BlendFunc.SourceConstantAlpha) / 255; 816 SrcPixel.col.alpha = (32 == SrcBpp) ? 817 (SrcPixel.col.alpha * BlendFunc.SourceConstantAlpha) / 255 : 818 BlendFunc.SourceConstantAlpha ; 819 820 Alpha = ((BlendFunc.AlphaFormat & AC_SRC_ALPHA) != 0) ? 821 SrcPixel.col.alpha : BlendFunc.SourceConstantAlpha ; 822 823 DstPixel.ul = *Dst; 824 DstPixel.col.red = Clamp8((DstPixel.col.red * (255 - Alpha)) / 255 + SrcPixel.col.red) ; 825 DstPixel.col.green = Clamp8((DstPixel.col.green * (255 - Alpha)) / 255 + SrcPixel.col.green) ; 826 DstPixel.col.blue = Clamp8((DstPixel.col.blue * (255 - Alpha)) / 255 + SrcPixel.col.blue) ; 827 DstPixel.col.alpha = Clamp8((DstPixel.col.alpha * (255 - Alpha)) / 255 + SrcPixel.col.alpha) ; 828 *Dst++ = DstPixel.ul; 829 SrcX = SourceRect->left + (Cols*(SourceRect->right - SourceRect->left))/(DestRect->right - DestRect->left); 830 } 831 Dst = (PULONG)((ULONG_PTR)Dest->pvScan0 + ((DestRect->top + Rows) * Dest->lDelta) + 832 (DestRect->left << 2)); 833 SrcY = SourceRect->top + (Rows*(SourceRect->bottom - SourceRect->top))/(DestRect->bottom - DestRect->top); 834 } 835 836 return TRUE; 837 } 838 839 /* EOF */ 840