reactos/subsys/win32k/dib/dib8bpp.c

   1 /*
   2  *  ReactOS W32 Subsystem
   3  *  Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 ReactOS Team
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19 /* $Id: dib8bpp.c,v 1.21 2004/04/07 15:37:50 weiden Exp $ */
  20 #undef WIN32_LEAN_AND_MEAN
  21 #include <windows.h>
  22 #include <stdlib.h>
  23 #include <win32k/bitmaps.h>
  24 #include <win32k/brush.h>
  25 #include <win32k/debug.h>
  26 #include <debug.h>
  27 #include <include/object.h>
  28 #include <ddk/winddi.h>
  29 #include "../eng/objects.h"
  30 #include "dib.h"
  31
  32 VOID
  33 DIB_8BPP_PutPixel(PSURFOBJ SurfObj, LONG x, LONG y, ULONG c)
  34 {
  35   PBYTE byteaddr = SurfObj->pvScan0 + y * SurfObj->lDelta + x;
  36
  37   *byteaddr = c;
  38 }
  39
  40 ULONG
  41 DIB_8BPP_GetPixel(PSURFOBJ SurfObj, LONG x, LONG y)
  42 {
  43   PBYTE byteaddr = SurfObj->pvScan0 + y * SurfObj->lDelta + x;
  44
  45   return (ULONG)(*byteaddr);
  46 }
  47
  48 VOID
  49 DIB_8BPP_HLine(PSURFOBJ SurfObj, LONG x1, LONG x2, LONG y, ULONG c)
  50 {
  51   PBYTE byteaddr = SurfObj->pvScan0 + y * SurfObj->lDelta;
  52   PBYTE addr = byteaddr + x1;
  53   LONG cx = x1;
  54
  55   while(cx < x2) {
  56     *addr = c;
  57     ++addr;
  58     ++cx;
  59   }
  60 }
  61
  62 VOID
  63 DIB_8BPP_VLine(PSURFOBJ SurfObj, LONG x, LONG y1, LONG y2, ULONG c)
  64 {
  65   PBYTE byteaddr = SurfObj->pvScan0 + y1 * SurfObj->lDelta;
  66   PBYTE addr = byteaddr + x;
  67   LONG lDelta = SurfObj->lDelta;
  68
  69   byteaddr = addr;
  70   while(y1++ < y2) {
  71     *addr = c;
  72
  73     addr += lDelta;
  74   }
  75 }
  76
  77 BOOLEAN
  78 DIB_8BPP_BitBltSrcCopy(SURFOBJ *DestSurf, SURFOBJ *SourceSurf,
  79                        SURFGDI *DestGDI,  SURFGDI *SourceGDI,
  80                        PRECTL  DestRect,  POINTL  *SourcePoint,
  81                        XLATEOBJ *ColorTranslation)
  82 {
  83   LONG     i, j, sx, sy, xColor, f1;
  84   PBYTE    SourceBits, DestBits, SourceLine, DestLine;
  85   PBYTE    SourceBits_4BPP, SourceLine_4BPP;
  86
  87   DestBits = DestSurf->pvScan0 + (DestRect->top * DestSurf->lDelta) + DestRect->left;
  88
  89   switch(SourceGDI->BitsPerPixel)
  90   {
  91     case 1:
  92       sx = SourcePoint->x;
  93       sy = SourcePoint->y;
  94
  95       for (j=DestRect->top; j<DestRect->bottom; j++)
  96       {
  97         sx = SourcePoint->x;
  98         for (i=DestRect->left; i<DestRect->right; i++)
  99         {
 100           if(DIB_1BPP_GetPixel(SourceSurf, sx, sy) == 0)
 101           {
 102             DIB_8BPP_PutPixel(DestSurf, i, j, XLATEOBJ_iXlate(ColorTranslation, 0));
 103           } else {
 104             DIB_8BPP_PutPixel(DestSurf, i, j, XLATEOBJ_iXlate(ColorTranslation, 1));
 105           }
 106           sx++;
 107         }
 108         sy++;
 109       }
 110       break;
 111
 112     case 4:
 113       SourceBits_4BPP = SourceSurf->pvScan0 + (SourcePoint->y * SourceSurf->lDelta) + (SourcePoint->x >> 1);
 114
 115       for (j=DestRect->top; j<DestRect->bottom; j++)
 116       {
 117         SourceLine_4BPP = SourceBits_4BPP;
 118         sx = SourcePoint->x;
 119         f1 = sx & 1;
 120
 121         for (i=DestRect->left; i<DestRect->right; i++)
 122         {
 123           xColor = XLATEOBJ_iXlate(ColorTranslation,
 124               (*SourceLine_4BPP & altnotmask[f1]) >> (4 * (1 - f1)));
 125           DIB_8BPP_PutPixel(DestSurf, i, j, xColor);
 126           if(f1 == 1) { SourceLine_4BPP++; f1 = 0; } else { f1 = 1; }
 127           sx++;
 128         }
 129
 130         SourceBits_4BPP += SourceSurf->lDelta;
 131       }
 132       break;
 133
 134     case 8:
 135       if (NULL == ColorTranslation || 0 != (ColorTranslation->flXlate & XO_TRIVIAL))
 136       {
 137         if (DestRect->top < SourcePoint->y)
 138           {
 139             SourceBits = SourceSurf->pvScan0 + (SourcePoint->y * SourceSurf->lDelta) + SourcePoint->x;
 140             for (j = DestRect->top; j < DestRect->bottom; j++)
 141               {
 142                 RtlMoveMemory(DestBits, SourceBits, DestRect->right - DestRect->left);
 143                 SourceBits += SourceSurf->lDelta;
 144                 DestBits += DestSurf->lDelta;
 145               }
 146           }
 147         else
 148           {
 149             SourceBits = SourceSurf->pvScan0 + ((SourcePoint->y + DestRect->bottom - DestRect->top - 1) * SourceSurf->lDelta) + SourcePoint->x;
 150             DestBits = DestSurf->pvScan0 + ((DestRect->bottom - 1) * DestSurf->lDelta) + DestRect->left;
 151             for (j = DestRect->bottom - 1; DestRect->top <= j; j--)
 152               {
 153                 RtlMoveMemory(DestBits, SourceBits, DestRect->right - DestRect->left);
 154                 SourceBits -= SourceSurf->lDelta;
 155                 DestBits -= DestSurf->lDelta;
 156               }
 157           }
 158       }
 159       else
 160       {
 161         if (DestRect->top < SourcePoint->y)
 162           {
 163             SourceLine = SourceSurf->pvScan0 + (SourcePoint->y * SourceSurf->lDelta) + SourcePoint->x;
 164             DestLine = DestBits;
 165             for (j = DestRect->top; j < DestRect->bottom; j++)
 166               {
 167                 SourceBits = SourceLine;
 168                 DestBits = DestLine;
 169                 for (i=DestRect->left; i<DestRect->right; i++)
 170                   {
 171                     *DestBits++ = XLATEOBJ_iXlate(ColorTranslation, *SourceBits++);
 172                   }
 173                 SourceLine += SourceSurf->lDelta;
 174                 DestLine += DestSurf->lDelta;
 175               }
 176           }
 177         else
 178           {
 179             SourceLine = SourceSurf->pvScan0 + ((SourcePoint->y + DestRect->bottom - DestRect->top - 1) * SourceSurf->lDelta) + SourcePoint->x;
 180             DestLine = DestSurf->pvScan0 + ((DestRect->bottom - 1) * DestSurf->lDelta) + DestRect->left;
 181             for (j = DestRect->bottom - 1; DestRect->top <= j; j--)
 182               {
 183                 SourceBits = SourceLine;
 184                 DestBits = DestLine;
 185                 for (i=DestRect->left; i<DestRect->right; i++)
 186                   {
 187                     *DestBits++ = XLATEOBJ_iXlate(ColorTranslation, *SourceBits++);
 188                   }
 189                 SourceLine -= SourceSurf->lDelta;
 190                 DestLine -= DestSurf->lDelta;
 191               }
 192           }
 193       }
 194       break;
 195
 196     case 16:
 197       SourceLine = SourceSurf->pvScan0 + (SourcePoint->y * SourceSurf->lDelta) + 2 * SourcePoint->x;
 198       DestLine = DestBits;
 199
 200       for (j = DestRect->top; j < DestRect->bottom; j++)
 201       {
 202         SourceBits = SourceLine;
 203         DestBits = DestLine;
 204
 205         for (i = DestRect->left; i < DestRect->right; i++)
 206         {
 207           xColor = *((PWORD) SourceBits);
 208           *DestBits = XLATEOBJ_iXlate(ColorTranslation, xColor);
 209           SourceBits += 2;
 210           DestBits += 1;
 211         }
 212
 213         SourceLine += SourceSurf->lDelta;
 214         DestLine += DestSurf->lDelta;
 215       }
 216       break;
 217
 218     case 24:
 219       SourceLine = SourceSurf->pvScan0 + (SourcePoint->y * SourceSurf->lDelta) + 3 * SourcePoint->x;
 220       DestLine = DestBits;
 221
 222       for (j = DestRect->top; j < DestRect->bottom; j++)
 223       {
 224         SourceBits = SourceLine;
 225         DestBits = DestLine;
 226
 227         for (i = DestRect->left; i < DestRect->right; i++)
 228         {
 229           xColor = (*(SourceBits + 2) << 0x10) +
 230              (*(SourceBits + 1) << 0x08) +
 231              (*(SourceBits));
 232           *DestBits = XLATEOBJ_iXlate(ColorTranslation, xColor);
 233           SourceBits += 3;
 234           DestBits += 1;
 235         }
 236
 237         SourceLine += SourceSurf->lDelta;
 238         DestLine += DestSurf->lDelta;
 239       }
 240       break;
 241
 242     case 32:
 243       SourceLine = SourceSurf->pvScan0 + (SourcePoint->y * SourceSurf->lDelta) + 4 * SourcePoint->x;
 244       DestLine = DestBits;
 245
 246       for (j = DestRect->top; j < DestRect->bottom; j++)
 247       {
 248         SourceBits = SourceLine;
 249         DestBits = DestLine;
 250
 251         for (i = DestRect->left; i < DestRect->right; i++)
 252         {
 253           xColor = *((PDWORD) SourceBits);
 254           *DestBits = XLATEOBJ_iXlate(ColorTranslation, xColor);
 255           SourceBits += 4;
 256           DestBits += 1;
 257         }
 258
 259         SourceLine += SourceSurf->lDelta;
 260         DestLine += DestSurf->lDelta;
 261       }
 262       break;
 263
 264     default:
 265       DbgPrint("DIB_8BPP_Bitblt: Unhandled Source BPP: %u\n", SourceGDI->BitsPerPixel);
 266       return FALSE;
 267   }
 268
 269   return TRUE;
 270 }
 271
 272 BOOLEAN
 273 DIB_8BPP_BitBlt(SURFOBJ *DestSurf, SURFOBJ *SourceSurf,
 274                  SURFGDI *DestGDI,  SURFGDI *SourceGDI,
 275                  PRECTL  DestRect,  POINTL  *SourcePoint,
 276                  PBRUSHOBJ Brush, PPOINTL BrushOrigin,
 277                  XLATEOBJ *ColorTranslation, ULONG Rop4)
 278 {
 279    LONG i, j, k, sx, sy;
 280    ULONG Dest, Source, Pattern = 0, PatternY;
 281    PULONG DestBits;
 282    BOOL UsesSource;
 283    BOOL UsesPattern;
 284    LONG RoundedRight;
 285    /* Pattern brushes */
 286    PGDIBRUSHOBJ GdiBrush;
 287    HBITMAP PatternSurface = NULL;
 288    PSURFOBJ PatternObj;
 289    ULONG PatternWidth, PatternHeight;
 290
 291    if (Rop4 == SRCCOPY)
 292    {
 293       return DIB_8BPP_BitBltSrcCopy(
 294          DestSurf,
 295          SourceSurf,
 296          DestGDI,
 297          SourceGDI,
 298          DestRect,
 299          SourcePoint,
 300          ColorTranslation);
 301    }
 302
 303    UsesSource = ((Rop4 & 0xCC0000) >> 2) != (Rop4 & 0x330000);
 304    UsesPattern = (((Rop4 & 0xF00000) >> 4) != (Rop4 & 0x0F0000)) && Brush;
 305
 306    if (UsesPattern)
 307    {
 308       if (Brush->iSolidColor == 0xFFFFFFFF)
 309       {
 310          PBITMAPOBJ PatternBitmap;
 311
 312          GdiBrush = CONTAINING_RECORD(
 313             Brush,
 314             GDIBRUSHOBJ,
 315             BrushObject);
 316
 317          PatternBitmap = BITMAPOBJ_LockBitmap(GdiBrush->hbmPattern);
 318          PatternSurface = BitmapToSurf(PatternBitmap, NULL);
 319          BITMAPOBJ_UnlockBitmap(GdiBrush->hbmPattern);
 320
 321          PatternObj = (PSURFOBJ)AccessUserObject((ULONG)PatternSurface);
 322          PatternWidth = PatternObj->sizlBitmap.cx;
 323          PatternHeight = PatternObj->sizlBitmap.cy;
 324
 325          UsesPattern = TRUE;
 326       }
 327       else
 328       {
 329          UsesPattern = FALSE;
 330          Pattern = (Brush->iSolidColor & 0xFF) |
 331                     ((Brush->iSolidColor & 0xFF) << 8) |
 332                     ((Brush->iSolidColor & 0xFF) << 16) |
 333                     ((Brush->iSolidColor & 0xFF) << 24);
 334       }
 335    }
 336
 337    RoundedRight = DestRect->right - ((DestRect->right - DestRect->left) & 0x3);
 338    sy = SourcePoint->y;
 339
 340    for (j = DestRect->top; j < DestRect->bottom; j++)
 341    {
 342       sx = SourcePoint->x;
 343       DestBits = (PULONG)(DestSurf->pvScan0 + DestRect->left + j * DestSurf->lDelta);
 344
 345       if(UsesPattern)
 346         PatternY = j % PatternHeight;
 347
 348       for (i = DestRect->left; i < RoundedRight; i += 4, DestBits++)
 349       {
 350          Dest = *DestBits;
 351
 352          if (UsesSource)
 353          {
 354             Source = 0;
 355             for (k = 0; k < 4; k++)
 356                Source |= (DIB_GetSource(SourceSurf, SourceGDI, sx + (i - DestRect->left) + k, sy, ColorTranslation) << (k * 8));
 357          }
 358
 359          if (UsesPattern)
 360          {
 361             Pattern = DIB_1BPP_GetPixel(PatternObj, i % PatternWidth, PatternY) ? GdiBrush->crFore : GdiBrush->crBack;
 362             Pattern |= (DIB_1BPP_GetPixel(PatternObj, (i + 1) % PatternWidth, PatternY) ? GdiBrush->crFore : GdiBrush->crBack) << 8;
 363             Pattern |= (DIB_1BPP_GetPixel(PatternObj, (i + 2) % PatternWidth, PatternY) ? GdiBrush->crFore : GdiBrush->crBack) << 16;
 364             Pattern |= (DIB_1BPP_GetPixel(PatternObj, (i + 3) % PatternWidth, PatternY) ? GdiBrush->crFore : GdiBrush->crBack) << 24;
 365          }
 366          *DestBits = DIB_DoRop(Rop4, Dest, Source, Pattern);
 367       }
 368
 369       if (i < DestRect->right)
 370       {
 371          Dest = *DestBits;
 372          for (; i < DestRect->right; i++)
 373          {
 374             if (UsesSource)
 375             {
 376                Source = DIB_GetSource(SourceSurf, SourceGDI, sx + (i - DestRect->left), sy, ColorTranslation);
 377             }
 378
 379             if (UsesPattern)
 380             {
 381                Pattern = DIB_1BPP_GetPixel(PatternObj, i % PatternWidth,PatternY) ? GdiBrush->crFore : GdiBrush->crBack;
 382             }
 383
 384             DIB_8BPP_PutPixel(DestSurf, i, j, DIB_DoRop(Rop4, Dest, Source, Pattern) & 0xFFFF);
 385             Dest >>= 8;
 386          }
 387       }
 388
 389       sy++;
 390    }
 391
 392    if (PatternSurface != NULL)
 393       EngDeleteSurface(PatternSurface);
 394
 395    return TRUE;
 396 }
 397
 398 /*
 399 =======================================
 400  Stretching functions goes below
 401  Some parts of code are based on an
 402  article "Bresenhame image scaling"
 403  Dr. Dobb Journal, May 2002
 404 =======================================
 405 */
 406
 407 typedef unsigned char PIXEL;
 408
 409 /* 16-bit HiColor (565 format) */
 410 inline PIXEL average8(PIXEL a, PIXEL b)
 411 {
 412   return a; // FIXME: Depend on SetStretchMode
 413 }
 414
 415 //NOTE: If you change something here, please do the same in other dibXXbpp.c files!
 416 void ScaleLineAvg8(PIXEL *Target, PIXEL *Source, int SrcWidth, int TgtWidth)
 417 {
 418   int NumPixels = TgtWidth;
 419   int IntPart = SrcWidth / TgtWidth;
 420   int FractPart = SrcWidth % TgtWidth;
 421   int Mid = TgtWidth >> 1;
 422   int E = 0;
 423   int skip;
 424   PIXEL p;
 425
 426   skip = (TgtWidth < SrcWidth) ? 0 : (TgtWidth / (2*SrcWidth) + 1);
 427   NumPixels -= skip;
 428
 429   while (NumPixels-- > 0) {
 430     p = *Source;
 431     if (E >= Mid)
 432       p = average8(p, *(Source+1));
 433     *Target++ = p;
 434     Source += IntPart;
 435     E += FractPart;
 436     if (E >= TgtWidth) {
 437       E -= TgtWidth;
 438       Source++;
 439     } /* if */
 440   } /* while */
 441   while (skip-- > 0)
 442     *Target++ = *Source;
 443 }
 444
 445 //NOTE: If you change something here, please do the same in other dibXXbpp.c files!
 446 void ScaleRectAvg8(PIXEL *Target, PIXEL *Source, int SrcWidth, int SrcHeight,
 447                   int TgtWidth, int TgtHeight, int srcPitch, int dstPitch)
 448 {
 449   int NumPixels = TgtHeight;
 450   int IntPart = ((SrcHeight / TgtHeight) * srcPitch); //(SrcHeight / TgtHeight) * SrcWidth;
 451   int FractPart = SrcHeight % TgtHeight;
 452   int Mid = TgtHeight >> 1;
 453   int E = 0;
 454   int skip;
 455   PIXEL *ScanLine, *ScanLineAhead;
 456   PIXEL *PrevSource = NULL;
 457   PIXEL *PrevSourceAhead = NULL;
 458
 459   skip = (TgtHeight < SrcHeight) ? 0 : (TgtHeight / (2*SrcHeight) + 1);
 460   NumPixels -= skip;
 461
 462   ScanLine = (PIXEL*)ExAllocatePool(NonPagedPool, TgtWidth*sizeof(PIXEL)); // FIXME: Should we use PagedPool here?
 463   ScanLineAhead = (PIXEL *)ExAllocatePool(NonPagedPool, TgtWidth*sizeof(PIXEL));
 464
 465   while (NumPixels-- > 0) {
 466     if (Source != PrevSource) {
 467       if (Source == PrevSourceAhead) {
 468         /* the next scan line has already been scaled and stored in
 469          * ScanLineAhead; swap the buffers that ScanLine and ScanLineAhead
 470          * point to
 471          */
 472         PIXEL *tmp = ScanLine;
 473         ScanLine = ScanLineAhead;
 474         ScanLineAhead = tmp;
 475       } else {
 476         ScaleLineAvg8(ScanLine, Source, SrcWidth, TgtWidth);
 477       } /* if */
 478       PrevSource = Source;
 479     } /* if */
 480
 481     if (E >= Mid && PrevSourceAhead != (PIXEL *)((BYTE *)Source + srcPitch)) {
 482       int x;
 483       ScaleLineAvg8(ScanLineAhead, (PIXEL *)((BYTE *)Source + srcPitch), SrcWidth, TgtWidth);
 484       for (x = 0; x < TgtWidth; x++)
 485         ScanLine[x] = average8(ScanLine[x], ScanLineAhead[x]);
 486       PrevSourceAhead = (PIXEL *)((BYTE *)Source + srcPitch);
 487     } /* if */
 488
 489     memcpy(Target, ScanLine, TgtWidth*sizeof(PIXEL));
 490     Target = (PIXEL *)((BYTE *)Target + dstPitch);
 491     Source += IntPart;
 492     E += FractPart;
 493     if (E >= TgtHeight) {
 494       E -= TgtHeight;
 495       Source = (PIXEL *)((BYTE *)Source + srcPitch);
 496     } /* if */
 497   } /* while */
 498
 499   if (skip > 0 && Source != PrevSource)
 500     ScaleLineAvg8(ScanLine, Source, SrcWidth, TgtWidth);
 501   while (skip-- > 0) {
 502     memcpy(Target, ScanLine, TgtWidth*sizeof(PIXEL));
 503     Target = (PIXEL *)((BYTE *)Target + dstPitch);
 504   } /* while */
 505
 506   ExFreePool(ScanLine);
 507   ExFreePool(ScanLineAhead);
 508 }
 509
 510 BOOLEAN DIB_8BPP_StretchBlt(SURFOBJ *DestSurf, SURFOBJ *SourceSurf,
 511                             SURFGDI *DestGDI, SURFGDI *SourceGDI,
 512                             RECTL* DestRect, RECTL *SourceRect,
 513                             POINTL* MaskOrigin, POINTL* BrushOrigin,
 514                                         XLATEOBJ *ColorTranslation, ULONG Mode)
 515 {
 516   BYTE *SourceLine, *DestLine;
 517
 518   DbgPrint("DIB_8BPP_StretchBlt: Source BPP: %u, srcRect: (%d,%d)-(%d,%d), dstRect: (%d,%d)-(%d,%d)\n",
 519      SourceGDI->BitsPerPixel, SourceRect->left, SourceRect->top, SourceRect->right, SourceRect->bottom,
 520      DestRect->left, DestRect->top, DestRect->right, DestRect->bottom);
 521
 522     switch(SourceGDI->BitsPerPixel)
 523     {
 524       case 1:
 525          return FALSE;
 526       break;
 527
 528       case 4:
 529          return FALSE;
 530       break;
 531
 532       case 8:
 533             SourceLine = SourceSurf->pvScan0 + (SourceRect->top * SourceSurf->lDelta) + SourceRect->left;
 534             DestLine = DestSurf->pvScan0 + (DestRect->top * DestSurf->lDelta) + DestRect->left;
 535
 536         ScaleRectAvg8((PIXEL *)DestLine, (PIXEL *)SourceLine,
 537            SourceRect->right-SourceRect->left, SourceRect->bottom-SourceRect->top,
 538            DestRect->right-DestRect->left, DestRect->bottom-DestRect->top, SourceSurf->lDelta, DestSurf->lDelta);
 539       break;
 540
 541       case 16:
 542          return FALSE;
 543       break;
 544
 545       case 24:
 546          return FALSE;
 547       break;
 548
 549       case 32:
 550          return FALSE;
 551       break;
 552
 553       default:
 554          DbgPrint("DIB_8BPP_StretchBlt: Unhandled Source BPP: %u\n", SourceGDI->BitsPerPixel);
 555       return FALSE;
 556     }
 557
 558   return TRUE;
 559 }
 560
 561 BOOLEAN
 562 DIB_8BPP_TransparentBlt(SURFOBJ *DestSurf, SURFOBJ *SourceSurf,
 563                         PSURFGDI DestGDI,  PSURFGDI SourceGDI,
 564                         RECTL*  DestRect,  POINTL  *SourcePoint,
 565                         XLATEOBJ *ColorTranslation, ULONG iTransColor)
 566 {
 567   ULONG RoundedRight, X, Y, SourceX, SourceY, Source, wd, Dest;
 568   ULONG *DestBits;
 569
 570   RoundedRight = DestRect->right - ((DestRect->right - DestRect->left) & 0x3);
 571   SourceY = SourcePoint->y;
 572   DestBits = (ULONG*)(DestSurf->pvScan0 + DestRect->left +
 573                       (DestRect->top * DestSurf->lDelta));
 574   wd = DestSurf->lDelta - (DestRect->right - DestRect->left);
 575
 576   for(Y = DestRect->top; Y < DestRect->bottom; Y++)
 577   {
 578     DestBits = (ULONG*)(DestSurf->pvScan0 + DestRect->left +
 579                         (Y * DestSurf->lDelta));
 580     SourceX = SourcePoint->x;
 581     for (X = DestRect->left; X < RoundedRight; X += 4, DestBits++)
 582     {
 583       Dest = *DestBits;
 584
 585       Source = DIB_GetSourceIndex(SourceSurf, SourceGDI, SourceX++, SourceY);
 586       if(Source != iTransColor)
 587       {
 588         Dest &= 0xFFFFFF00;
 589         Dest |= (XLATEOBJ_iXlate(ColorTranslation, Source) & 0xFF);
 590       }
 591
 592       Source = DIB_GetSourceIndex(SourceSurf, SourceGDI, SourceX++, SourceY);
 593       if(Source != iTransColor)
 594       {
 595         Dest &= 0xFFFF00FF;
 596         Dest |= ((XLATEOBJ_iXlate(ColorTranslation, Source) << 8) & 0xFF00);
 597       }
 598
 599       Source = DIB_GetSourceIndex(SourceSurf, SourceGDI, SourceX++, SourceY);
 600       if(Source != iTransColor)
 601       {
 602         Dest &= 0xFF00FFFF;
 603         Dest |= ((XLATEOBJ_iXlate(ColorTranslation, Source) << 16) & 0xFF0000);
 604       }
 605
 606       Source = DIB_GetSourceIndex(SourceSurf, SourceGDI, SourceX++, SourceY);
 607       if(Source != iTransColor)
 608       {
 609         Dest &= 0x00FFFFFF;
 610         Dest |= ((XLATEOBJ_iXlate(ColorTranslation, Source) << 24) & 0xFF000000);
 611       }
 612
 613       *DestBits = Dest;
 614     }
 615
 616     if(X < DestRect->right)
 617     {
 618       for (; X < DestRect->right; X++)
 619       {
 620         Source = DIB_GetSourceIndex(SourceSurf, SourceGDI, SourceX++, SourceY);
 621         if(Source != iTransColor)
 622         {
 623           *((BYTE*)DestBits) = (BYTE)(XLATEOBJ_iXlate(ColorTranslation, Source) & 0xFF);
 624         }
 625         DestBits = (PULONG)((ULONG_PTR)DestBits + 1);
 626       }
 627     }
 628     SourceY++;
 629   }
 630
 631   return TRUE;
 632 }
 633
 634 /* EOF */