reactos/subsystems/win32/win32k/objects/bitmaps.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 /* $Id$ */
  20
  21 #include <w32k.h>
  22
  23 #define NDEBUG
  24 #include <debug.h>
  25
  26 HBITMAP APIENTRY
  27 IntGdiCreateBitmap(
  28     INT Width,
  29     INT Height,
  30     UINT Planes,
  31     UINT BitsPixel,
  32     IN OPTIONAL LPBYTE pBits)
  33 {
  34     HBITMAP hBitmap;
  35     SIZEL Size;
  36     LONG WidthBytes;
  37     PSURFACE psurfBmp;
  38
  39     /* NOTE: Windows also doesn't store nr. of planes separately! */
  40     BitsPixel = BITMAP_GetRealBitsPixel(BitsPixel * Planes);
  41
  42     /* Check parameters */
  43     if (BitsPixel == 0 || Width <= 0 || Width >= 0x8000000 || Height == 0)
  44     {
  45         DPRINT1("Width = %d, Height = %d BitsPixel = %d\n",
  46                 Width, Height, BitsPixel);
  47         SetLastWin32Error(ERROR_INVALID_PARAMETER);
  48         return 0;
  49     }
  50
  51     WidthBytes = BITMAP_GetWidthBytes(Width, BitsPixel);
  52
  53     Size.cx = Width;
  54     Size.cy = abs(Height);
  55
  56     /* Make sure that cjBits will not overflow */
  57     if ((ULONGLONG)WidthBytes * Size.cy >= 0x100000000ULL)
  58     {
  59         DPRINT1("Width = %d, Height = %d BitsPixel = %d\n",
  60                 Width, Height, BitsPixel);
  61         SetLastWin32Error(ERROR_INVALID_PARAMETER);
  62         return 0;
  63     }
  64
  65     /* Create the bitmap object. */
  66     hBitmap = IntCreateBitmap(Size, WidthBytes,
  67                               BitmapFormat(BitsPixel, BI_RGB),
  68                               (Height < 0 ? BMF_TOPDOWN : 0) |
  69                               (NULL == pBits ? 0 : BMF_NOZEROINIT), NULL);
  70     if (!hBitmap)
  71     {
  72         DPRINT("IntGdiCreateBitmap: returned 0\n");
  73         return 0;
  74     }
  75
  76     psurfBmp = SURFACE_LockSurface(hBitmap);
  77     if (psurfBmp == NULL)
  78     {
  79         GreDeleteObject(hBitmap);
  80         return NULL;
  81     }
  82
  83     psurfBmp->flFlags = BITMAPOBJ_IS_APIBITMAP;
  84     psurfBmp->hDC = NULL; // Fixme
  85
  86     if (NULL != pBits)
  87     {
  88         IntSetBitmapBits(psurfBmp, psurfBmp->SurfObj.cjBits, pBits);
  89     }
  90
  91     SURFACE_UnlockSurface(psurfBmp);
  92
  93     DPRINT("IntGdiCreateBitmap : %dx%d, %d BPP colors, topdown %d, returning %08x\n",
  94            Size.cx, Size.cy, BitsPixel, (Height < 0 ? 1 : 0), hBitmap);
  95
  96     return hBitmap;
  97 }
  98
  99
 100 HBITMAP APIENTRY
 101 NtGdiCreateBitmap(
 102     INT Width,
 103     INT Height,
 104     UINT Planes,
 105     UINT BitsPixel,
 106     IN OPTIONAL LPBYTE pUnsafeBits)
 107 {
 108     if (pUnsafeBits)
 109     {
 110         BOOL Hit = FALSE;
 111         UINT cjBits = BITMAP_GetWidthBytes(Width, BitsPixel) * abs(Height);
 112
 113         // FIXME: Use MmSecureVirtualMemory
 114         _SEH2_TRY
 115         {
 116             ProbeForRead(pUnsafeBits, cjBits, 1);
 117         }
 118         _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
 119         {
 120             Hit = TRUE;
 121         }
 122         _SEH2_END
 123
 124         if (Hit) return 0;
 125     }
 126
 127     return IntGdiCreateBitmap(Width, Height, Planes, BitsPixel, pUnsafeBits);
 128 }
 129
 130 HBITMAP FASTCALL
 131 IntCreateCompatibleBitmap(
 132     PDC Dc,
 133     INT Width,
 134     INT Height)
 135 {
 136     HBITMAP Bmp = NULL;
 137
 138     /* MS doc says if width or height is 0, return 1-by-1 pixel, monochrome bitmap */
 139     if (0 == Width || 0 == Height)
 140     {
 141         Bmp = NtGdiGetStockObject(DEFAULT_BITMAP);
 142     }
 143     else
 144     {
 145         if (Dc->dctype != DC_TYPE_MEMORY)
 146         {
 147             Bmp = IntGdiCreateBitmap(abs(Width),
 148                                      abs(Height),
 149                                      IntGdiGetDeviceCaps(Dc,PLANES),
 150                                      IntGdiGetDeviceCaps(Dc,BITSPIXEL),
 151                                      NULL);
 152         }
 153         else
 154         {
 155             DIBSECTION dibs;
 156             INT Count;
 157             PSURFACE psurf = Dc->dclevel.pSurface;
 158             Count = BITMAP_GetObject(psurf, sizeof(dibs), &dibs);
 159
 160             if (Count)
 161             {
 162                 if (Count == sizeof(BITMAP))
 163                 {
 164                     /* We have a bitmap bug!!! W/O the HACK, we have white icons.
 165
 166                        MSDN Note: When a memory device context is created, it initially
 167                        has a 1-by-1 monochrome bitmap selected into it. If this memory
 168                        device context is used in CreateCompatibleBitmap, the bitmap that
 169                        is created is a monochrome bitmap. To create a color bitmap, use
 170                        the hDC that was used to create the memory device context, as
 171                        shown in the following code:
 172
 173                            HDC memDC = CreateCompatibleDC(hDC);
 174                            HBITMAP memBM = CreateCompatibleBitmap(hDC, nWidth, nHeight);
 175                            SelectObject(memDC, memBM);
 176                      */
 177                     Bmp = IntGdiCreateBitmap(abs(Width),
 178                                              abs(Height),
 179                                              dibs.dsBm.bmPlanes,
 180                                              IntGdiGetDeviceCaps(Dc,BITSPIXEL),//<-- HACK! dibs.dsBm.bmBitsPixel, // <-- Correct!
 181                                              NULL);
 182                 }
 183                 else
 184                 {
 185                     /* A DIB section is selected in the DC */
 186                     BITMAPINFO *bi;
 187                     PVOID Bits;
 188
 189                     /* Allocate memory for a BITMAPINFOHEADER structure and a
 190                        color table. The maximum number of colors in a color table
 191                        is 256 which corresponds to a bitmap with depth 8.
 192                        Bitmaps with higher depths don't have color tables. */
 193                     bi = ExAllocatePoolWithTag(PagedPool,
 194                                                sizeof(BITMAPINFOHEADER) +
 195                                                    256 * sizeof(RGBQUAD),
 196                                                TAG_TEMP);
 197
 198                     if (bi)
 199                     {
 200                         bi->bmiHeader.biSize          = sizeof(bi->bmiHeader);
 201                         bi->bmiHeader.biWidth         = Width;
 202                         bi->bmiHeader.biHeight        = Height;
 203                         bi->bmiHeader.biPlanes        = dibs.dsBmih.biPlanes;
 204                         bi->bmiHeader.biBitCount      = dibs.dsBmih.biBitCount;
 205                         bi->bmiHeader.biCompression   = dibs.dsBmih.biCompression;
 206                         bi->bmiHeader.biSizeImage     = 0;
 207                         bi->bmiHeader.biXPelsPerMeter = dibs.dsBmih.biXPelsPerMeter;
 208                         bi->bmiHeader.biYPelsPerMeter = dibs.dsBmih.biYPelsPerMeter;
 209                         bi->bmiHeader.biClrUsed       = dibs.dsBmih.biClrUsed;
 210                         bi->bmiHeader.biClrImportant  = dibs.dsBmih.biClrImportant;
 211
 212                         if (bi->bmiHeader.biCompression == BI_BITFIELDS)
 213                         {
 214                             /* Copy the color masks */
 215                             RtlCopyMemory(bi->bmiColors, dibs.dsBitfields, 3 * sizeof(DWORD));
 216                         }
 217                         else if (bi->bmiHeader.biBitCount <= 8)
 218                         {
 219                             /* Copy the color table */
 220                             UINT Index;
 221                             PPALETTE PalGDI = PALETTE_LockPalette(psurf->hDIBPalette);
 222
 223                             if (!PalGDI)
 224                             {
 225                                 ExFreePoolWithTag(bi, TAG_TEMP);
 226                                 SetLastWin32Error(ERROR_INVALID_HANDLE);
 227                                 return 0;
 228                             }
 229
 230                             for (Index = 0;
 231                                     Index < 256 && Index < PalGDI->NumColors;
 232                                     Index++)
 233                             {
 234                                 bi->bmiColors[Index].rgbRed   = PalGDI->IndexedColors[Index].peRed;
 235                                 bi->bmiColors[Index].rgbGreen = PalGDI->IndexedColors[Index].peGreen;
 236                                 bi->bmiColors[Index].rgbBlue  = PalGDI->IndexedColors[Index].peBlue;
 237                                 bi->bmiColors[Index].rgbReserved = 0;
 238                             }
 239                             PALETTE_UnlockPalette(PalGDI);
 240                         }
 241
 242                         Bmp = DIB_CreateDIBSection(Dc,
 243                                                    bi,
 244                                                    DIB_RGB_COLORS,
 245                                                    &Bits,
 246                                                    NULL,
 247                                                    0,
 248                                                    0);
 249
 250                         ExFreePoolWithTag(bi, TAG_TEMP);
 251                         return Bmp;
 252                     }
 253                 }
 254             }
 255         }
 256     }
 257     return Bmp;
 258 }
 259
 260 HBITMAP APIENTRY
 261 NtGdiCreateCompatibleBitmap(
 262     HDC hDC,
 263     INT Width,
 264     INT Height)
 265 {
 266     HBITMAP Bmp;
 267     PDC Dc;
 268
 269     if (Width <= 0 || Height <= 0 || (Width * Height) > 0x3FFFFFFF)
 270     {
 271         SetLastWin32Error(ERROR_INVALID_PARAMETER);
 272         return NULL;
 273     }
 274
 275     if (!hDC)
 276         return IntGdiCreateBitmap(Width, Height, 1, 1, 0);
 277
 278     Dc = DC_LockDc(hDC);
 279
 280     DPRINT("NtGdiCreateCompatibleBitmap(%04x,%d,%d, bpp:%d) = \n",
 281            hDC, Width, Height, Dc->ppdev->GDIInfo.cBitsPixel);
 282
 283     if (NULL == Dc)
 284     {
 285         SetLastWin32Error(ERROR_INVALID_HANDLE);
 286         return NULL;
 287     }
 288
 289     Bmp = IntCreateCompatibleBitmap(Dc, Width, Height);
 290
 291     DPRINT("\t\t%04x\n", Bmp);
 292     DC_UnlockDc(Dc);
 293     return Bmp;
 294 }
 295
 296 BOOL APIENTRY
 297 NtGdiGetBitmapDimension(
 298     HBITMAP hBitmap,
 299     LPSIZE Dimension)
 300 {
 301     PSURFACE psurfBmp;
 302     BOOL Ret = TRUE;
 303
 304     if (hBitmap == NULL)
 305         return FALSE;
 306
 307     psurfBmp = SURFACE_LockSurface(hBitmap);
 308     if (psurfBmp == NULL)
 309     {
 310         SetLastWin32Error(ERROR_INVALID_HANDLE);
 311         return FALSE;
 312     }
 313
 314     _SEH2_TRY
 315     {
 316         ProbeForWrite(Dimension, sizeof(SIZE), 1);
 317         *Dimension = psurfBmp->dimension;
 318     }
 319     _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
 320     {
 321         Ret = FALSE;
 322     }
 323     _SEH2_END
 324
 325     SURFACE_UnlockSurface(psurfBmp);
 326
 327     return Ret;
 328 }
 329
 330 COLORREF APIENTRY
 331 NtGdiGetPixel(HDC hDC, INT XPos, INT YPos)
 332 {
 333     PDC dc = NULL;
 334     COLORREF Result = (COLORREF)CLR_INVALID; // default to failure
 335     BOOL bInRect = FALSE;
 336     SURFACE *psurf;
 337     SURFOBJ *pso;
 338     HPALETTE Pal = 0;
 339     XLATEOBJ *XlateObj;
 340     HBITMAP hBmpTmp;
 341
 342     dc = DC_LockDc(hDC);
 343
 344     if (!dc)
 345     {
 346         SetLastWin32Error(ERROR_INVALID_HANDLE);
 347         return Result;
 348     }
 349
 350     if (dc->dctype == DC_TYPE_INFO)
 351     {
 352         DC_UnlockDc(dc);
 353         return Result;
 354     }
 355
 356     XPos += dc->ptlDCOrig.x;
 357     YPos += dc->ptlDCOrig.y;
 358     if (RECTL_bPointInRect(&dc->rosdc.CombinedClip->rclBounds, XPos, YPos))
 359     {
 360         bInRect = TRUE;
 361         psurf = dc->dclevel.pSurface;
 362         pso = &psurf->SurfObj;
 363         if (psurf)
 364         {
 365             Pal = psurf->hDIBPalette;
 366             if (!Pal) Pal = pPrimarySurface->DevInfo.hpalDefault;
 367
 368             /* FIXME: Verify if it shouldn't be PAL_BGR! */
 369             XlateObj = (XLATEOBJ*)IntEngCreateXlate(PAL_RGB, 0, NULL, Pal);
 370             if (XlateObj)
 371             {
 372                 // check if this DC has a DIB behind it...
 373                 if (pso->pvScan0) // STYPE_BITMAP == pso->iType
 374                 {
 375                     ASSERT(pso->lDelta);
 376                     Result = XLATEOBJ_iXlate(XlateObj,
 377                                              DibFunctionsForBitmapFormat[pso->iBitmapFormat].DIB_GetPixel(pso, XPos, YPos));
 378                 }
 379                 EngDeleteXlate(XlateObj);
 380             }
 381         }
 382     }
 383     DC_UnlockDc(dc);
 384
 385     // if Result is still CLR_INVALID, then the "quick" method above didn't work
 386     if (bInRect && Result == CLR_INVALID)
 387     {
 388         // FIXME: create a 1x1 32BPP DIB, and blit to it
 389         HDC hDCTmp = NtGdiCreateCompatibleDC(hDC);
 390         if (hDCTmp)
 391         {
 392             static const BITMAPINFOHEADER bih = { sizeof(BITMAPINFOHEADER), 1, 1, 1, 32, BI_RGB, 0, 0, 0, 0, 0 };
 393             BITMAPINFO bi;
 394             RtlMoveMemory(&(bi.bmiHeader), &bih, sizeof(bih));
 395             hBmpTmp = NtGdiCreateDIBitmapInternal(hDC,
 396                                                   bi.bmiHeader.biWidth,
 397                                                   bi.bmiHeader.biHeight,
 398                                                   0,
 399                                                   NULL,
 400                                                   &bi,
 401                                                   DIB_RGB_COLORS,
 402                                                   bi.bmiHeader.biBitCount,
 403                                                   bi.bmiHeader.biSizeImage,
 404                                                   0,
 405                                                   0);
 406
 407             //HBITMAP hBmpTmp = IntGdiCreateBitmap(1, 1, 1, 32, NULL);
 408             if (hBmpTmp)
 409             {
 410                 HBITMAP hBmpOld = (HBITMAP)NtGdiSelectBitmap(hDCTmp, hBmpTmp);
 411                 if (hBmpOld)
 412                 {
 413                     PSURFACE psurf;
 414
 415                     NtGdiBitBlt(hDCTmp, 0, 0, 1, 1, hDC, XPos, YPos, SRCCOPY, 0, 0);
 416                     NtGdiSelectBitmap(hDCTmp, hBmpOld);
 417
 418                     // our bitmap is no longer selected, so we can access it's stuff...
 419                     psurf = SURFACE_LockSurface(hBmpTmp);
 420                     if (psurf)
 421                     {
 422                         // Dont you need to convert something here?
 423                         Result = *(COLORREF*)psurf->SurfObj.pvScan0;
 424                         SURFACE_UnlockSurface(psurf);
 425                     }
 426                 }
 427                 GreDeleteObject(hBmpTmp);
 428             }
 429             NtGdiDeleteObjectApp(hDCTmp);
 430         }
 431     }
 432
 433     return Result;
 434 }
 435
 436
 437 LONG APIENTRY
 438 IntGetBitmapBits(
 439     PSURFACE psurf,
 440     DWORD Bytes,
 441     OUT PBYTE Bits)
 442 {
 443     LONG ret;
 444
 445     ASSERT(Bits);
 446
 447     /* Don't copy more bytes than the buffer has */
 448     Bytes = min(Bytes, psurf->SurfObj.cjBits);
 449
 450 #if 0
 451     /* FIXME: Call DDI CopyBits here if available  */
 452     if (psurf->DDBitmap)
 453     {
 454         DPRINT("Calling device specific BitmapBits\n");
 455         if (psurf->DDBitmap->funcs->pBitmapBits)
 456         {
 457             ret = psurf->DDBitmap->funcs->pBitmapBits(hbitmap,
 458                                                       bits,
 459                                                       count,
 460                                                       DDB_GET);
 461         }
 462         else
 463         {
 464             ERR_(bitmap)("BitmapBits == NULL??\n");
 465             ret = 0;
 466         }
 467     }
 468     else
 469 #endif
 470     {
 471         RtlCopyMemory(Bits, psurf->SurfObj.pvBits, Bytes);
 472         ret = Bytes;
 473     }
 474     return ret;
 475 }
 476
 477 LONG APIENTRY
 478 NtGdiGetBitmapBits(
 479     HBITMAP hBitmap,
 480     ULONG Bytes,
 481     OUT OPTIONAL PBYTE pUnsafeBits)
 482 {
 483     PSURFACE psurf;
 484     LONG bmSize, ret;
 485
 486     if (pUnsafeBits != NULL && Bytes == 0)
 487     {
 488         return 0;
 489     }
 490
 491     psurf = SURFACE_LockSurface(hBitmap);
 492     if (!psurf)
 493     {
 494         SetLastWin32Error(ERROR_INVALID_HANDLE);
 495         return 0;
 496     }
 497
 498     bmSize = BITMAP_GetWidthBytes(psurf->SurfObj.sizlBitmap.cx,
 499              BitsPerFormat(psurf->SurfObj.iBitmapFormat)) *
 500              abs(psurf->SurfObj.sizlBitmap.cy);
 501
 502     /* If the bits vector is null, the function should return the read size */
 503     if (pUnsafeBits == NULL)
 504     {
 505         SURFACE_UnlockSurface(psurf);
 506         return bmSize;
 507     }
 508
 509     /* Don't copy more bytes than the buffer has */
 510     Bytes = min(Bytes, bmSize);
 511
 512     // FIXME: use MmSecureVirtualMemory
 513     _SEH2_TRY
 514     {
 515         ProbeForWrite(pUnsafeBits, Bytes, 1);
 516         ret = IntGetBitmapBits(psurf, Bytes, pUnsafeBits);
 517     }
 518     _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
 519     {
 520         ret = 0;
 521     }
 522     _SEH2_END
 523
 524     SURFACE_UnlockSurface(psurf);
 525
 526     return ret;
 527 }
 528
 529
 530 LONG APIENTRY
 531 IntSetBitmapBits(
 532     PSURFACE psurf,
 533     DWORD Bytes,
 534     IN PBYTE Bits)
 535 {
 536     LONG ret;
 537
 538     /* Don't copy more bytes than the buffer has */
 539     Bytes = min(Bytes, psurf->SurfObj.cjBits);
 540
 541 #if 0
 542     /* FIXME: call DDI specific function here if available  */
 543     if (psurf->DDBitmap)
 544     {
 545         DPRINT("Calling device specific BitmapBits\n");
 546         if (psurf->DDBitmap->funcs->pBitmapBits)
 547         {
 548             ret = psurf->DDBitmap->funcs->pBitmapBits(hBitmap,
 549                                                       (void *)Bits,
 550                                                       Bytes,
 551                                                       DDB_SET);
 552         }
 553         else
 554         {
 555             DPRINT("BitmapBits == NULL??\n");
 556             ret = 0;
 557         }
 558     }
 559     else
 560 #endif
 561     {
 562         RtlCopyMemory(psurf->SurfObj.pvBits, Bits, Bytes);
 563         ret = Bytes;
 564     }
 565
 566     return ret;
 567 }
 568
 569
 570 LONG APIENTRY
 571 NtGdiSetBitmapBits(
 572     HBITMAP hBitmap,
 573     DWORD Bytes,
 574     IN PBYTE pUnsafeBits)
 575 {
 576     LONG ret;
 577     PSURFACE psurf;
 578
 579     if (pUnsafeBits == NULL || Bytes == 0)
 580     {
 581         return 0;
 582     }
 583
 584     psurf = SURFACE_LockSurface(hBitmap);
 585     if (psurf == NULL)
 586     {
 587         SetLastWin32Error(ERROR_INVALID_HANDLE);
 588         return 0;
 589     }
 590
 591     _SEH2_TRY
 592     {
 593         ProbeForRead(pUnsafeBits, Bytes, 1);
 594         ret = IntSetBitmapBits(psurf, Bytes, pUnsafeBits);
 595     }
 596     _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
 597     {
 598         ret = 0;
 599     }
 600     _SEH2_END
 601
 602     SURFACE_UnlockSurface(psurf);
 603
 604     return ret;
 605 }
 606
 607 BOOL APIENTRY
 608 NtGdiSetBitmapDimension(
 609     HBITMAP hBitmap,
 610     INT Width,
 611     INT Height,
 612     LPSIZE Size)
 613 {
 614     PSURFACE psurf;
 615     BOOL Ret = TRUE;
 616
 617     if (hBitmap == NULL)
 618         return FALSE;
 619
 620     psurf = SURFACE_LockSurface(hBitmap);
 621     if (psurf == NULL)
 622     {
 623         SetLastWin32Error(ERROR_INVALID_HANDLE);
 624         return FALSE;
 625     }
 626
 627     if (Size)
 628     {
 629         _SEH2_TRY
 630         {
 631             ProbeForWrite(Size, sizeof(SIZE), 1);
 632             *Size = psurf->dimension;
 633         }
 634         _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
 635         {
 636             Ret = FALSE;
 637         }
 638         _SEH2_END
 639     }
 640
 641     /* The dimension is changed even if writing the old value failed */
 642     psurf->dimension.cx = Width;
 643     psurf->dimension.cy = Height;
 644
 645     SURFACE_UnlockSurface(psurf);
 646
 647     return Ret;
 648 }
 649
 650 BOOL APIENTRY
 651 GdiSetPixelV(
 652     HDC hDC,
 653     INT X,
 654     INT Y,
 655     COLORREF Color)
 656 {
 657     HBRUSH hbrush = NtGdiCreateSolidBrush(Color, NULL);
 658     HGDIOBJ OldBrush;
 659
 660     if (hbrush == NULL)
 661         return(FALSE);
 662
 663     OldBrush = NtGdiSelectBrush(hDC, hbrush);
 664     if (OldBrush == NULL)
 665     {
 666         GreDeleteObject(hbrush);
 667         return(FALSE);
 668     }
 669
 670     NtGdiPatBlt(hDC, X, Y, 1, 1, PATCOPY);
 671     NtGdiSelectBrush(hDC, OldBrush);
 672     GreDeleteObject(hbrush);
 673
 674     return TRUE;
 675 }
 676
 677 COLORREF APIENTRY
 678 NtGdiSetPixel(
 679     HDC hDC,
 680     INT X,
 681     INT Y,
 682     COLORREF Color)
 683 {
 684     DPRINT("0 NtGdiSetPixel X %ld Y %ld C %ld\n", X, Y, Color);
 685
 686     if (GdiSetPixelV(hDC,X,Y,Color))
 687     {
 688         Color = NtGdiGetPixel(hDC,X,Y);
 689         DPRINT("1 NtGdiSetPixel X %ld Y %ld C %ld\n", X, Y, Color);
 690         return Color;
 691     }
 692
 693     Color = (COLORREF)CLR_INVALID;
 694     DPRINT("2 NtGdiSetPixel X %ld Y %ld C %ld\n", X, Y, Color);
 695     return Color;
 696 }
 697
 698
 699 /*  Internal Functions  */
 700
 701 UINT FASTCALL
 702 BITMAP_GetRealBitsPixel(UINT nBitsPixel)
 703 {
 704     if (nBitsPixel <= 1)
 705         return 1;
 706     if (nBitsPixel <= 4)
 707         return 4;
 708     if (nBitsPixel <= 8)
 709         return 8;
 710     if (nBitsPixel <= 16)
 711         return 16;
 712     if (nBitsPixel <= 24)
 713         return 24;
 714     if (nBitsPixel <= 32)
 715         return 32;
 716
 717     return 0;
 718 }
 719
 720 INT FASTCALL
 721 BITMAP_GetWidthBytes(INT bmWidth, INT bpp)
 722 {
 723 #if 0
 724     switch (bpp)
 725     {
 726     case 1:
 727         return 2 * ((bmWidth+15) >> 4);
 728
 729     case 24:
 730         bmWidth *= 3; /* fall through */
 731     case 8:
 732         return bmWidth + (bmWidth & 1);
 733
 734     case 32:
 735         return bmWidth * 4;
 736
 737     case 16:
 738     case 15:
 739         return bmWidth * 2;
 740
 741     case 4:
 742         return 2 * ((bmWidth+3) >> 2);
 743
 744     default:
 745         DPRINT ("stub");
 746     }
 747
 748     return -1;
 749 #endif
 750
 751     return ((bmWidth * bpp + 15) & ~15) >> 3;
 752 }
 753
 754 HBITMAP FASTCALL
 755 BITMAP_CopyBitmap(HBITMAP hBitmap)
 756 {
 757     HBITMAP res;
 758     BITMAP bm;
 759     SURFACE *Bitmap, *resBitmap;
 760     SIZEL Size;
 761
 762     if (hBitmap == NULL)
 763     {
 764         return 0;
 765     }
 766
 767     Bitmap = GDIOBJ_LockObj(hBitmap, GDI_OBJECT_TYPE_BITMAP);
 768     if (Bitmap == NULL)
 769     {
 770         return 0;
 771     }
 772
 773     BITMAP_GetObject(Bitmap, sizeof(BITMAP), (PVOID)&bm);
 774     bm.bmBits = NULL;
 775     if (Bitmap->SurfObj.lDelta >= 0)
 776         bm.bmHeight = -bm.bmHeight;
 777
 778     Size.cx = abs(bm.bmWidth);
 779     Size.cy = abs(bm.bmHeight);
 780     res = IntCreateBitmap(Size,
 781                           bm.bmWidthBytes,
 782                           BitmapFormat(bm.bmBitsPixel * bm.bmPlanes, BI_RGB),
 783                           (bm.bmHeight < 0 ? BMF_TOPDOWN : 0) | BMF_NOZEROINIT,
 784                           NULL);
 785
 786     if (res)
 787     {
 788         PBYTE buf;
 789
 790         resBitmap = GDIOBJ_LockObj(res, GDI_OBJECT_TYPE_BITMAP);
 791         if (resBitmap)
 792         {
 793             buf = ExAllocatePoolWithTag(PagedPool,
 794                                         bm.bmWidthBytes * abs(bm.bmHeight),
 795                                         TAG_BITMAP);
 796             if (buf == NULL)
 797             {
 798                 GDIOBJ_UnlockObjByPtr((POBJ)resBitmap);
 799                 GDIOBJ_UnlockObjByPtr((POBJ)Bitmap);
 800                 GreDeleteObject(res);
 801                 return 0;
 802             }
 803             IntGetBitmapBits(Bitmap, bm.bmWidthBytes * abs(bm.bmHeight), buf);
 804             IntSetBitmapBits(resBitmap, bm.bmWidthBytes * abs(bm.bmHeight), buf);
 805             ExFreePoolWithTag(buf,TAG_BITMAP);
 806             resBitmap->flFlags = Bitmap->flFlags;
 807             GDIOBJ_UnlockObjByPtr((POBJ)resBitmap);
 808         }
 809         else
 810         {
 811             GreDeleteObject(res);
 812             res = NULL;
 813         }
 814     }
 815
 816     GDIOBJ_UnlockObjByPtr((POBJ)Bitmap);
 817
 818     return  res;
 819 }
 820
 821 INT APIENTRY
 822 BITMAP_GetObject(SURFACE *psurf, INT Count, LPVOID buffer)
 823 {
 824     PBITMAP pBitmap;
 825
 826     if (!buffer) return sizeof(BITMAP);
 827     if ((UINT)Count < sizeof(BITMAP)) return 0;
 828
 829     /* always fill a basic BITMAP structure */
 830     pBitmap = buffer;
 831     pBitmap->bmType = 0;
 832     pBitmap->bmWidth = psurf->SurfObj.sizlBitmap.cx;
 833     pBitmap->bmHeight = psurf->SurfObj.sizlBitmap.cy;
 834     pBitmap->bmWidthBytes = abs(psurf->SurfObj.lDelta);
 835     pBitmap->bmPlanes = 1;
 836     pBitmap->bmBitsPixel = BitsPerFormat(psurf->SurfObj.iBitmapFormat);
 837
 838     /* Check for DIB section */
 839     if (psurf->hSecure)
 840     {
 841         /* Set bmBits in this case */
 842         pBitmap->bmBits = psurf->SurfObj.pvBits;
 843
 844         if (Count >= sizeof(DIBSECTION))
 845         {
 846             /* Fill rest of DIBSECTION */
 847             PDIBSECTION pds = buffer;
 848
 849             pds->dsBmih.biSize = sizeof(BITMAPINFOHEADER);
 850             pds->dsBmih.biWidth = pds->dsBm.bmWidth;
 851             pds->dsBmih.biHeight = pds->dsBm.bmHeight;
 852             pds->dsBmih.biPlanes = pds->dsBm.bmPlanes;
 853             pds->dsBmih.biBitCount = pds->dsBm.bmBitsPixel;
 854             switch (psurf->SurfObj.iBitmapFormat)
 855             {
 856                 /* FIXME: What about BI_BITFIELDS? */
 857                 case BMF_1BPP:
 858                 case BMF_4BPP:
 859                 case BMF_8BPP:
 860                 case BMF_16BPP:
 861                 case BMF_24BPP:
 862                 case BMF_32BPP:
 863                    pds->dsBmih.biCompression = BI_RGB;
 864                    break;
 865                 case BMF_4RLE:
 866                    pds->dsBmih.biCompression = BI_RLE4;
 867                    break;
 868                 case BMF_8RLE:
 869                    pds->dsBmih.biCompression = BI_RLE8;
 870                    break;
 871                 case BMF_JPEG:
 872                    pds->dsBmih.biCompression = BI_JPEG;
 873                    break;
 874                 case BMF_PNG:
 875                    pds->dsBmih.biCompression = BI_PNG;
 876                    break;
 877             }
 878             pds->dsBmih.biSizeImage = psurf->SurfObj.cjBits;
 879             pds->dsBmih.biXPelsPerMeter = 0;
 880             pds->dsBmih.biYPelsPerMeter = 0;
 881             pds->dsBmih.biClrUsed = psurf->biClrUsed;
 882             pds->dsBmih.biClrImportant = psurf->biClrImportant;
 883             pds->dsBitfields[0] = psurf->dsBitfields[0];
 884             pds->dsBitfields[1] = psurf->dsBitfields[1];
 885             pds->dsBitfields[2] = psurf->dsBitfields[2];
 886             pds->dshSection = psurf->hDIBSection;
 887             pds->dsOffset = psurf->dwOffset;
 888
 889             return sizeof(DIBSECTION);
 890         }
 891     }
 892     else
 893     {
 894         /* not set according to wine test, confirmed in win2k */
 895         pBitmap->bmBits = NULL;
 896     }
 897
 898     return sizeof(BITMAP);
 899 }
 900
 901 /*
 902  * @implemented
 903  */
 904 HDC
 905 APIENTRY
 906 NtGdiGetDCforBitmap(
 907     IN HBITMAP hsurf)
 908 {
 909     HDC hDC = NULL;
 910     PSURFACE psurf = SURFACE_LockSurface(hsurf);
 911     if (psurf)
 912     {
 913         hDC = psurf->hDC;
 914         SURFACE_UnlockSurface(psurf);
 915     }
 916     return hDC;
 917 }
 918
 919 /* EOF */