dlls/gdi32/bitmap.c

   1 /*
   2  * GDI bitmap objects
   3  *
   4  * Copyright 1993 Alexandre Julliard
   5  *           1998 Huw D M Davies
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include <stdarg.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25
  26 #include "windef.h"
  27 #include "winbase.h"
  28 #include "wingdi.h"
  29 #include "gdi_private.h"
  30 #include "wine/debug.h"
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(bitmap);
  33
  34
  35 static HGDIOBJ BITMAP_SelectObject( HGDIOBJ handle, HDC hdc );
  36 static INT BITMAP_GetObject( HGDIOBJ handle, INT count, LPVOID buffer );
  37 static BOOL BITMAP_DeleteObject( HGDIOBJ handle );
  38
  39 static const struct gdi_obj_funcs bitmap_funcs =
  40 {
  41     BITMAP_SelectObject,  /* pSelectObject */
  42     BITMAP_GetObject,     /* pGetObjectA */
  43     BITMAP_GetObject,     /* pGetObjectW */
  44     NULL,                 /* pUnrealizeObject */
  45     BITMAP_DeleteObject   /* pDeleteObject */
  46 };
  47
  48
  49 /***********************************************************************
  50  *           null driver fallback implementations
  51  */
  52
  53 DWORD nulldrv_GetImage( PHYSDEV dev, HBITMAP hbitmap, BITMAPINFO *info,
  54                         struct gdi_image_bits *bits, struct bitblt_coords *src )
  55 {
  56     if (!hbitmap) return ERROR_NOT_SUPPORTED;
  57     return dib_driver.pGetImage( 0, hbitmap, info, bits, src );
  58 }
  59
  60 DWORD nulldrv_PutImage( PHYSDEV dev, HBITMAP hbitmap, HRGN clip, BITMAPINFO *info,
  61                         const struct gdi_image_bits *bits, struct bitblt_coords *src,
  62                         struct bitblt_coords *dst, DWORD rop )
  63 {
  64     if (!hbitmap) return ERROR_SUCCESS;
  65     return dib_driver.pPutImage( NULL, hbitmap, clip, info, bits, src, dst, rop );
  66 }
  67
  68 BOOL nulldrv_CopyBitmap( HBITMAP src, HBITMAP dst )
  69 {
  70     BOOL ret = TRUE;
  71     BITMAPOBJ *src_bmp = GDI_GetObjPtr( src, OBJ_BITMAP );
  72
  73     if (!src_bmp) return FALSE;
  74     if (src_bmp->dib.dsBm.bmBits)
  75     {
  76         BITMAPOBJ *dst_bmp = GDI_GetObjPtr( dst, OBJ_BITMAP );
  77         int stride = get_dib_stride( dst_bmp->dib.dsBm.bmWidth, dst_bmp->dib.dsBm.bmBitsPixel );
  78         dst_bmp->dib.dsBm.bmBits = HeapAlloc( GetProcessHeap(), 0, dst_bmp->dib.dsBm.bmHeight * stride );
  79         if (dst_bmp->dib.dsBm.bmBits)
  80             memcpy( dst_bmp->dib.dsBm.bmBits, src_bmp->dib.dsBm.bmBits, dst_bmp->dib.dsBm.bmHeight * stride );
  81         else
  82             ret = FALSE;
  83         GDI_ReleaseObj( dst );
  84     }
  85     GDI_ReleaseObj( src );
  86     return ret;
  87 }
  88
  89
  90 /******************************************************************************
  91  * CreateBitmap [GDI32.@]
  92  *
  93  * Creates a bitmap with the specified info.
  94  *
  95  * PARAMS
  96  *    width  [I] bitmap width
  97  *    height [I] bitmap height
  98  *    planes [I] Number of color planes
  99  *    bpp    [I] Number of bits to identify a color
 100  *    bits   [I] Pointer to array containing color data
 101  *
 102  * RETURNS
 103  *    Success: Handle to bitmap
 104  *    Failure: 0
 105  */
 106 HBITMAP WINAPI CreateBitmap( INT width, INT height, UINT planes,
 107                              UINT bpp, LPCVOID bits )
 108 {
 109     BITMAP bm;
 110
 111     bm.bmType = 0;
 112     bm.bmWidth = width;
 113     bm.bmHeight = height;
 114     bm.bmWidthBytes = get_bitmap_stride( width, bpp );
 115     bm.bmPlanes = planes;
 116     bm.bmBitsPixel = bpp;
 117     bm.bmBits = (LPVOID)bits;
 118
 119     return CreateBitmapIndirect( &bm );
 120 }
 121
 122 /******************************************************************************
 123  * CreateCompatibleBitmap [GDI32.@]
 124  *
 125  * Creates a bitmap compatible with the DC.
 126  *
 127  * PARAMS
 128  *    hdc    [I] Handle to device context
 129  *    width  [I] Width of bitmap
 130  *    height [I] Height of bitmap
 131  *
 132  * RETURNS
 133  *    Success: Handle to bitmap
 134  *    Failure: 0
 135  */
 136 HBITMAP WINAPI CreateCompatibleBitmap( HDC hdc, INT width, INT height)
 137 {
 138     char buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
 139     BITMAPINFO *bi = (BITMAPINFO *)buffer;
 140     DIBSECTION dib;
 141
 142     TRACE("(%p,%d,%d)\n", hdc, width, height);
 143
 144     if (GetObjectType( hdc ) != OBJ_MEMDC)
 145         return CreateBitmap( width, height,
 146                              GetDeviceCaps(hdc, PLANES), GetDeviceCaps(hdc, BITSPIXEL), NULL );
 147
 148     switch (GetObjectW( GetCurrentObject( hdc, OBJ_BITMAP ), sizeof(dib), &dib ))
 149     {
 150     case sizeof(BITMAP): /* A device-dependent bitmap is selected in the DC */
 151         return CreateBitmap( width, height, dib.dsBm.bmPlanes, dib.dsBm.bmBitsPixel, NULL );
 152
 153     case sizeof(DIBSECTION): /* A DIB section is selected in the DC */
 154         bi->bmiHeader = dib.dsBmih;
 155         bi->bmiHeader.biWidth  = width;
 156         bi->bmiHeader.biHeight = height;
 157         if (dib.dsBmih.biCompression == BI_BITFIELDS)  /* copy the color masks */
 158             memcpy(bi->bmiColors, dib.dsBitfields, sizeof(dib.dsBitfields));
 159         else if (dib.dsBmih.biBitCount <= 8)  /* copy the color table */
 160             GetDIBColorTable(hdc, 0, 256, bi->bmiColors);
 161         return CreateDIBSection( hdc, bi, DIB_RGB_COLORS, NULL, NULL, 0 );
 162
 163     default:
 164         return 0;
 165     }
 166 }
 167
 168
 169 /******************************************************************************
 170  * CreateBitmapIndirect [GDI32.@]
 171  *
 172  * Creates a bitmap with the specified info.
 173  *
 174  * PARAMS
 175  *  bmp [I] Pointer to the bitmap info describing the bitmap
 176  *
 177  * RETURNS
 178  *    Success: Handle to bitmap
 179  *    Failure: NULL. Use GetLastError() to determine the cause.
 180  *
 181  * NOTES
 182  *  If a width or height of 0 are given, a 1x1 monochrome bitmap is returned.
 183  */
 184 HBITMAP WINAPI CreateBitmapIndirect( const BITMAP *bmp )
 185 {
 186     BITMAP bm;
 187     BITMAPOBJ *bmpobj;
 188     HBITMAP hbitmap;
 189
 190     if (!bmp || bmp->bmType)
 191     {
 192         SetLastError( ERROR_INVALID_PARAMETER );
 193         return NULL;
 194     }
 195
 196     if (bmp->bmWidth > 0x7ffffff || bmp->bmHeight > 0x7ffffff)
 197     {
 198         SetLastError( ERROR_INVALID_PARAMETER );
 199         return 0;
 200     }
 201
 202     bm = *bmp;
 203
 204     if (!bm.bmWidth || !bm.bmHeight)
 205     {
 206         return GetStockObject( DEFAULT_BITMAP );
 207     }
 208     else
 209     {
 210         if (bm.bmHeight < 0)
 211             bm.bmHeight = -bm.bmHeight;
 212         if (bm.bmWidth < 0)
 213             bm.bmWidth = -bm.bmWidth;
 214     }
 215
 216     if (bm.bmPlanes != 1)
 217     {
 218         FIXME("planes = %d\n", bm.bmPlanes);
 219         SetLastError( ERROR_INVALID_PARAMETER );
 220         return NULL;
 221     }
 222
 223     /* Windows only uses 1, 4, 8, 16, 24 and 32 bpp */
 224     if(bm.bmBitsPixel == 1)         bm.bmBitsPixel = 1;
 225     else if(bm.bmBitsPixel <= 4)    bm.bmBitsPixel = 4;
 226     else if(bm.bmBitsPixel <= 8)    bm.bmBitsPixel = 8;
 227     else if(bm.bmBitsPixel <= 16)   bm.bmBitsPixel = 16;
 228     else if(bm.bmBitsPixel <= 24)   bm.bmBitsPixel = 24;
 229     else if(bm.bmBitsPixel <= 32)   bm.bmBitsPixel = 32;
 230     else {
 231         WARN("Invalid bmBitsPixel %d, returning ERROR_INVALID_PARAMETER\n", bm.bmBitsPixel);
 232         SetLastError(ERROR_INVALID_PARAMETER);
 233         return NULL;
 234     }
 235
 236     /* Windows ignores the provided bm.bmWidthBytes */
 237     bm.bmWidthBytes = get_bitmap_stride( bm.bmWidth, bm.bmBitsPixel );
 238     /* XP doesn't allow to create bitmaps larger than 128 Mb */
 239     if (bm.bmHeight > 128 * 1024 * 1024 / bm.bmWidthBytes)
 240     {
 241         SetLastError( ERROR_NOT_ENOUGH_MEMORY );
 242         return 0;
 243     }
 244
 245     /* Create the BITMAPOBJ */
 246     if (!(bmpobj = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*bmpobj) )))
 247     {
 248         SetLastError( ERROR_NOT_ENOUGH_MEMORY );
 249         return 0;
 250     }
 251
 252     bmpobj->dib.dsBm = bm;
 253     bmpobj->dib.dsBm.bmBits = NULL;
 254     bmpobj->funcs = &null_driver;
 255
 256     if (!(hbitmap = alloc_gdi_handle( &bmpobj->header, OBJ_BITMAP, &bitmap_funcs )))
 257     {
 258         HeapFree( GetProcessHeap(), 0, bmpobj );
 259         return 0;
 260     }
 261
 262     if (bm.bmBits)
 263         SetBitmapBits( hbitmap, bm.bmHeight * bm.bmWidthBytes, bm.bmBits );
 264
 265     TRACE("%dx%d, bpp %d planes %d: returning %p\n", bm.bmWidth, bm.bmHeight,
 266           bm.bmBitsPixel, bm.bmPlanes, hbitmap);
 267
 268     return hbitmap;
 269 }
 270
 271
 272 /***********************************************************************
 273  * GetBitmapBits [GDI32.@]
 274  *
 275  * Copies bitmap bits of bitmap to buffer.
 276  *
 277  * RETURNS
 278  *    Success: Number of bytes copied
 279  *    Failure: 0
 280  */
 281 LONG WINAPI GetBitmapBits(
 282     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 283     LONG count,        /* [in]  Number of bytes to copy */
 284     LPVOID bits)       /* [out] Pointer to buffer to receive bits */
 285 {
 286     char buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
 287     BITMAPINFO *info = (BITMAPINFO *)buffer;
 288     struct gdi_image_bits src_bits;
 289     struct bitblt_coords src;
 290     int dst_stride, max, ret;
 291     BITMAPOBJ *bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
 292
 293     if (!bmp) return 0;
 294
 295     dst_stride = get_bitmap_stride( bmp->dib.dsBm.bmWidth, bmp->dib.dsBm.bmBitsPixel );
 296     ret = max = dst_stride * bmp->dib.dsBm.bmHeight;
 297     if (!bits) goto done;
 298     if (count > max) count = max;
 299     ret = count;
 300
 301     src.visrect.left = 0;
 302     src.visrect.right = bmp->dib.dsBm.bmWidth;
 303     src.visrect.top = 0;
 304     src.visrect.bottom = (count + dst_stride - 1) / dst_stride;
 305     src.x = src.y = 0;
 306     src.width = src.visrect.right - src.visrect.left;
 307     src.height = src.visrect.bottom - src.visrect.top;
 308
 309     if (!bmp->funcs->pGetImage( NULL, hbitmap, info, &src_bits, &src ))
 310     {
 311         const char *src_ptr = src_bits.ptr;
 312         int src_stride = get_dib_stride( info->bmiHeader.biWidth, info->bmiHeader.biBitCount );
 313
 314         /* GetBitmapBits returns 16-bit aligned data */
 315
 316         if (info->bmiHeader.biHeight > 0)
 317         {
 318             src_ptr += (info->bmiHeader.biHeight - 1) * src_stride;
 319             src_stride = -src_stride;
 320         }
 321         src_ptr += src.visrect.top * src_stride;
 322
 323         if (src_stride == dst_stride) memcpy( bits, src_ptr, count );
 324         else while (count > 0)
 325         {
 326             memcpy( bits, src_ptr, min( count, dst_stride ) );
 327             src_ptr += src_stride;
 328             bits = (char *)bits + dst_stride;
 329             count -= dst_stride;
 330         }
 331         if (src_bits.free) src_bits.free( &src_bits );
 332     }
 333     else ret = 0;
 334
 335 done:
 336     GDI_ReleaseObj( hbitmap );
 337     return ret;
 338 }
 339
 340
 341 /******************************************************************************
 342  * SetBitmapBits [GDI32.@]
 343  *
 344  * Sets bits of color data for a bitmap.
 345  *
 346  * RETURNS
 347  *    Success: Number of bytes used in setting the bitmap bits
 348  *    Failure: 0
 349  */
 350 LONG WINAPI SetBitmapBits(
 351     HBITMAP hbitmap, /* [in] Handle to bitmap */
 352     LONG count,        /* [in] Number of bytes in bitmap array */
 353     LPCVOID bits)      /* [in] Address of array with bitmap bits */
 354 {
 355     char buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
 356     BITMAPINFO *info = (BITMAPINFO *)buffer;
 357     BITMAPOBJ *bmp;
 358     DWORD err;
 359     int i, src_stride, dst_stride;
 360     struct bitblt_coords src, dst;
 361     struct gdi_image_bits src_bits;
 362     HRGN clip = NULL;
 363
 364     if (!bits) return 0;
 365
 366     bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
 367     if (!bmp) return 0;
 368
 369     if (count < 0) {
 370         WARN("(%d): Negative number of bytes passed???\n", count );
 371         count = -count;
 372     }
 373
 374     src_stride = get_bitmap_stride( bmp->dib.dsBm.bmWidth, bmp->dib.dsBm.bmBitsPixel );
 375     count = min( count, src_stride * bmp->dib.dsBm.bmHeight );
 376
 377     dst_stride = get_dib_stride( bmp->dib.dsBm.bmWidth, bmp->dib.dsBm.bmBitsPixel );
 378
 379     src.visrect.left   = src.x = 0;
 380     src.visrect.top    = src.y = 0;
 381     src.visrect.right  = src.width = bmp->dib.dsBm.bmWidth;
 382     src.visrect.bottom = src.height = (count + src_stride - 1 ) / src_stride;
 383     dst = src;
 384
 385     if (count % src_stride)
 386     {
 387         HRGN last_row;
 388         int extra_pixels = ((count % src_stride) << 3) / bmp->dib.dsBm.bmBitsPixel;
 389
 390         if ((count % src_stride << 3) % bmp->dib.dsBm.bmBitsPixel)
 391             FIXME( "Unhandled partial pixel\n" );
 392         clip = CreateRectRgn( src.visrect.left, src.visrect.top,
 393                               src.visrect.right, src.visrect.bottom - 1 );
 394         last_row = CreateRectRgn( src.visrect.left, src.visrect.bottom - 1,
 395                                   src.visrect.left + extra_pixels, src.visrect.bottom );
 396         CombineRgn( clip, clip, last_row, RGN_OR );
 397         DeleteObject( last_row );
 398     }
 399
 400     TRACE("(%p, %d, %p) %dx%d %d bpp fetched height: %d\n",
 401           hbitmap, count, bits, bmp->dib.dsBm.bmWidth, bmp->dib.dsBm.bmHeight,
 402           bmp->dib.dsBm.bmBitsPixel, src.height );
 403
 404     if (src_stride == dst_stride)
 405     {
 406         src_bits.ptr = (void *)bits;
 407         src_bits.is_copy = FALSE;
 408         src_bits.free = NULL;
 409     }
 410     else
 411     {
 412         if (!(src_bits.ptr = HeapAlloc( GetProcessHeap(), 0, dst.height * dst_stride )))
 413         {
 414             GDI_ReleaseObj( hbitmap );
 415             return 0;
 416         }
 417         src_bits.is_copy = TRUE;
 418         src_bits.free = free_heap_bits;
 419         for (i = 0; i < count / src_stride; i++)
 420             memcpy( (char *)src_bits.ptr + i * dst_stride, (char *)bits + i * src_stride, src_stride );
 421         if (count % src_stride)
 422             memcpy( (char *)src_bits.ptr + i * dst_stride, (char *)bits + i * src_stride, count % src_stride );
 423     }
 424
 425     /* query the color info */
 426     info->bmiHeader.biSize          = sizeof(info->bmiHeader);
 427     info->bmiHeader.biPlanes        = 1;
 428     info->bmiHeader.biBitCount      = bmp->dib.dsBm.bmBitsPixel;
 429     info->bmiHeader.biCompression   = BI_RGB;
 430     info->bmiHeader.biXPelsPerMeter = 0;
 431     info->bmiHeader.biYPelsPerMeter = 0;
 432     info->bmiHeader.biClrUsed       = 0;
 433     info->bmiHeader.biClrImportant  = 0;
 434     info->bmiHeader.biWidth         = 0;
 435     info->bmiHeader.biHeight        = 0;
 436     info->bmiHeader.biSizeImage     = 0;
 437     err = bmp->funcs->pPutImage( NULL, hbitmap, 0, info, NULL, NULL, NULL, SRCCOPY );
 438
 439     if (!err || err == ERROR_BAD_FORMAT)
 440     {
 441         info->bmiHeader.biWidth     = bmp->dib.dsBm.bmWidth;
 442         info->bmiHeader.biHeight    = -dst.height;
 443         info->bmiHeader.biSizeImage = dst.height * dst_stride;
 444         err = bmp->funcs->pPutImage( NULL, hbitmap, clip, info, &src_bits, &src, &dst, SRCCOPY );
 445     }
 446     if (err) count = 0;
 447
 448     if (clip) DeleteObject( clip );
 449     if (src_bits.free) src_bits.free( &src_bits );
 450     GDI_ReleaseObj( hbitmap );
 451     return count;
 452 }
 453
 454
 455 static void set_initial_bitmap_bits( HBITMAP hbitmap, BITMAPOBJ *bmp )
 456 {
 457     char src_bmibuf[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
 458     BITMAPINFO *src_info = (BITMAPINFO *)src_bmibuf;
 459     char dst_bmibuf[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
 460     BITMAPINFO *dst_info = (BITMAPINFO *)dst_bmibuf;
 461     DWORD err;
 462     struct gdi_image_bits bits;
 463     struct bitblt_coords src, dst;
 464
 465     if (!bmp->dib.dsBm.bmBits) return;
 466     if (bmp->funcs->pPutImage == nulldrv_PutImage) return;
 467
 468     get_ddb_bitmapinfo( bmp, src_info );
 469
 470     bits.ptr = bmp->dib.dsBm.bmBits;
 471     bits.is_copy = FALSE;
 472     bits.free = NULL;
 473     bits.param = NULL;
 474
 475     src.x      = 0;
 476     src.y      = 0;
 477     src.width  = bmp->dib.dsBm.bmWidth;
 478     src.height = bmp->dib.dsBm.bmHeight;
 479     src.visrect.left   = 0;
 480     src.visrect.top    = 0;
 481     src.visrect.right  = bmp->dib.dsBm.bmWidth;
 482     src.visrect.bottom = bmp->dib.dsBm.bmHeight;
 483     dst = src;
 484
 485     copy_bitmapinfo( dst_info, src_info );
 486
 487     err = bmp->funcs->pPutImage( NULL, hbitmap, 0, dst_info, &bits, &src, &dst, 0 );
 488     if (err == ERROR_BAD_FORMAT)
 489     {
 490         err = convert_bits( src_info, &src, dst_info, &bits, FALSE );
 491         if (!err) err = bmp->funcs->pPutImage( NULL, hbitmap, 0, dst_info, &bits, &src, &dst, 0 );
 492         if (bits.free) bits.free( &bits );
 493     }
 494 }
 495
 496 /***********************************************************************
 497  *           BITMAP_SetOwnerDC
 498  *
 499  * Set the type of DC that owns the bitmap. This is used when the
 500  * bitmap is selected into a device to initialize the bitmap function
 501  * table.
 502  */
 503 static BOOL BITMAP_SetOwnerDC( HBITMAP hbitmap, PHYSDEV physdev )
 504 {
 505     BITMAPOBJ *bitmap;
 506     BOOL ret = TRUE;
 507
 508     /* never set the owner of the stock bitmap since it can be selected in multiple DCs */
 509     if (hbitmap == GetStockObject(DEFAULT_BITMAP)) return TRUE;
 510
 511     if (!(bitmap = GDI_GetObjPtr( hbitmap, OBJ_BITMAP ))) return FALSE;
 512
 513     if (bitmap->funcs != physdev->funcs)
 514     {
 515         /* we can only change from the null driver to some other driver */
 516         if (bitmap->funcs == &null_driver)
 517         {
 518             if (physdev->funcs->pCreateBitmap)
 519             {
 520                 ret = physdev->funcs->pCreateBitmap( physdev, hbitmap );
 521                 if (ret)
 522                 {
 523                     bitmap->funcs = physdev->funcs;
 524                     set_initial_bitmap_bits( hbitmap, bitmap );
 525                 }
 526             }
 527             else bitmap->funcs = &dib_driver;  /* use the DIB driver to emulate DDB support */
 528         }
 529         else
 530         {
 531             FIXME( "Trying to select bitmap %p in different DC type\n", hbitmap );
 532             ret = FALSE;
 533         }
 534     }
 535     GDI_ReleaseObj( hbitmap );
 536     return ret;
 537 }
 538
 539
 540 /***********************************************************************
 541  *           BITMAP_SelectObject
 542  */
 543 static HGDIOBJ BITMAP_SelectObject( HGDIOBJ handle, HDC hdc )
 544 {
 545     HGDIOBJ ret;
 546     BITMAPOBJ *bitmap;
 547     DC *dc;
 548     PHYSDEV physdev = NULL, old_physdev = NULL, pathdev = NULL;
 549
 550     if (!(dc = get_dc_ptr( hdc ))) return 0;
 551
 552     if (GetObjectType( hdc ) != OBJ_MEMDC)
 553     {
 554         ret = 0;
 555         goto done;
 556     }
 557     ret = dc->hBitmap;
 558     if (handle == dc->hBitmap) goto done;  /* nothing to do */
 559
 560     if (!(bitmap = GDI_GetObjPtr( handle, OBJ_BITMAP )))
 561     {
 562         ret = 0;
 563         goto done;
 564     }
 565
 566     if (bitmap->header.selcount && (handle != GetStockObject(DEFAULT_BITMAP)))
 567     {
 568         WARN( "Bitmap already selected in another DC\n" );
 569         GDI_ReleaseObj( handle );
 570         ret = 0;
 571         goto done;
 572     }
 573
 574     if (dc->physDev->funcs == &path_driver) pathdev = pop_dc_driver( &dc->physDev );
 575
 576     old_physdev = GET_DC_PHYSDEV( dc, pSelectBitmap );
 577     if(old_physdev == dc->dibdrv)
 578         old_physdev = pop_dc_driver( &dc->physDev );
 579
 580     physdev = GET_DC_PHYSDEV( dc, pSelectBitmap );
 581     if (physdev->funcs == &null_driver)
 582     {
 583         physdev = dc->dibdrv;
 584         if (physdev) push_dc_driver( &dc->physDev, physdev, physdev->funcs );
 585         else
 586         {
 587             if (!dib_driver.pCreateDC( &dc->physDev, NULL, NULL, NULL, NULL )) goto done;
 588             dc->dibdrv = physdev = dc->physDev;
 589         }
 590     }
 591
 592     if (!BITMAP_SetOwnerDC( handle, physdev ))
 593     {
 594         GDI_ReleaseObj( handle );
 595         ret = 0;
 596         goto done;
 597     }
 598     if (!physdev->funcs->pSelectBitmap( physdev, handle ))
 599     {
 600         GDI_ReleaseObj( handle );
 601         ret = 0;
 602     }
 603     else
 604     {
 605         dc->hBitmap = handle;
 606         GDI_inc_ref_count( handle );
 607         dc->dirty = 0;
 608         dc->vis_rect.left   = 0;
 609         dc->vis_rect.top    = 0;
 610         dc->vis_rect.right  = bitmap->dib.dsBm.bmWidth;
 611         dc->vis_rect.bottom = bitmap->dib.dsBm.bmHeight;
 612         GDI_ReleaseObj( handle );
 613         DC_InitDC( dc );
 614         GDI_dec_ref_count( ret );
 615     }
 616
 617  done:
 618     if(!ret)
 619     {
 620         if (physdev && physdev == dc->dibdrv)
 621             pop_dc_driver( &dc->physDev );
 622         if (old_physdev && old_physdev == dc->dibdrv)
 623             push_dc_driver( &dc->physDev, old_physdev, old_physdev->funcs );
 624     }
 625     if (pathdev) push_dc_driver( &dc->physDev, pathdev, pathdev->funcs );
 626     release_dc_ptr( dc );
 627     return ret;
 628 }
 629
 630
 631 /***********************************************************************
 632  *           BITMAP_DeleteObject
 633  */
 634 static BOOL BITMAP_DeleteObject( HGDIOBJ handle )
 635 {
 636     const struct gdi_dc_funcs *funcs;
 637     BITMAPOBJ *bmp = GDI_GetObjPtr( handle, OBJ_BITMAP );
 638
 639     if (!bmp) return FALSE;
 640     funcs = bmp->funcs;
 641     GDI_ReleaseObj( handle );
 642
 643     funcs->pDeleteBitmap( handle );
 644
 645     if (!(bmp = free_gdi_handle( handle ))) return FALSE;
 646
 647     HeapFree( GetProcessHeap(), 0, bmp->dib.dsBm.bmBits );
 648     return HeapFree( GetProcessHeap(), 0, bmp );
 649 }
 650
 651
 652 /***********************************************************************
 653  *           BITMAP_GetObject
 654  */
 655 static INT BITMAP_GetObject( HGDIOBJ handle, INT count, LPVOID buffer )
 656 {
 657     INT ret = 0;
 658     BITMAPOBJ *bmp = GDI_GetObjPtr( handle, OBJ_BITMAP );
 659
 660     if (!bmp) return 0;
 661
 662     if (!buffer) ret = sizeof(BITMAP);
 663     else if (count >= sizeof(BITMAP))
 664     {
 665         BITMAP *bitmap = buffer;
 666         *bitmap = bmp->dib.dsBm;
 667         bitmap->bmBits = NULL;
 668         ret = sizeof(BITMAP);
 669     }
 670     GDI_ReleaseObj( handle );
 671     return ret;
 672 }
 673
 674
 675 /******************************************************************************
 676  * CreateDiscardableBitmap [GDI32.@]
 677  *
 678  * Creates a discardable bitmap.
 679  *
 680  * RETURNS
 681  *    Success: Handle to bitmap
 682  *    Failure: NULL
 683  */
 684 HBITMAP WINAPI CreateDiscardableBitmap(
 685     HDC hdc,    /* [in] Handle to device context */
 686     INT width,  /* [in] Bitmap width */
 687     INT height) /* [in] Bitmap height */
 688 {
 689     return CreateCompatibleBitmap( hdc, width, height );
 690 }
 691
 692
 693 /******************************************************************************
 694  * GetBitmapDimensionEx [GDI32.@]
 695  *
 696  * Retrieves dimensions of a bitmap.
 697  *
 698  * RETURNS
 699  *    Success: TRUE
 700  *    Failure: FALSE
 701  */
 702 BOOL WINAPI GetBitmapDimensionEx(
 703     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 704     LPSIZE size)     /* [out] Address of struct receiving dimensions */
 705 {
 706     BITMAPOBJ * bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
 707     if (!bmp) return FALSE;
 708     *size = bmp->size;
 709     GDI_ReleaseObj( hbitmap );
 710     return TRUE;
 711 }
 712
 713
 714 /******************************************************************************
 715  * SetBitmapDimensionEx [GDI32.@]
 716  *
 717  * Assigns dimensions to a bitmap.
 718  * MSDN says that this function will fail if hbitmap is a handle created by
 719  * CreateDIBSection, but that's not true on Windows 2000.
 720  *
 721  * RETURNS
 722  *    Success: TRUE
 723  *    Failure: FALSE
 724  */
 725 BOOL WINAPI SetBitmapDimensionEx(
 726     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 727     INT x,           /* [in]  Bitmap width */
 728     INT y,           /* [in]  Bitmap height */
 729     LPSIZE prevSize) /* [out] Address of structure for orig dims */
 730 {
 731     BITMAPOBJ * bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
 732     if (!bmp) return FALSE;
 733     if (prevSize) *prevSize = bmp->size;
 734     bmp->size.cx = x;
 735     bmp->size.cy = y;
 736     GDI_ReleaseObj( hbitmap );
 737     return TRUE;
 738 }