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
  69 /******************************************************************************
  70  * CreateBitmap [GDI32.@]
  71  *
  72  * Creates a bitmap with the specified info.
  73  *
  74  * PARAMS
  75  *    width  [I] bitmap width
  76  *    height [I] bitmap height
  77  *    planes [I] Number of color planes
  78  *    bpp    [I] Number of bits to identify a color
  79  *    bits   [I] Pointer to array containing color data
  80  *
  81  * RETURNS
  82  *    Success: Handle to bitmap
  83  *    Failure: 0
  84  */
  85 HBITMAP WINAPI CreateBitmap( INT width, INT height, UINT planes,
  86                              UINT bpp, LPCVOID bits )
  87 {
  88     BITMAP bm;
  89
  90     bm.bmType = 0;
  91     bm.bmWidth = width;
  92     bm.bmHeight = height;
  93     bm.bmWidthBytes = get_bitmap_stride( width, bpp );
  94     bm.bmPlanes = planes;
  95     bm.bmBitsPixel = bpp;
  96     bm.bmBits = (LPVOID)bits;
  97
  98     return CreateBitmapIndirect( &bm );
  99 }
 100
 101 /******************************************************************************
 102  * CreateCompatibleBitmap [GDI32.@]
 103  *
 104  * Creates a bitmap compatible with the DC.
 105  *
 106  * PARAMS
 107  *    hdc    [I] Handle to device context
 108  *    width  [I] Width of bitmap
 109  *    height [I] Height of bitmap
 110  *
 111  * RETURNS
 112  *    Success: Handle to bitmap
 113  *    Failure: 0
 114  */
 115 HBITMAP WINAPI CreateCompatibleBitmap( HDC hdc, INT width, INT height)
 116 {
 117     HBITMAP hbmpRet = 0;
 118
 119     TRACE("(%p,%d,%d) =\n", hdc, width, height);
 120
 121     if (GetObjectType( hdc ) != OBJ_MEMDC)
 122     {
 123         hbmpRet = CreateBitmap(width, height,
 124                                GetDeviceCaps(hdc, PLANES),
 125                                GetDeviceCaps(hdc, BITSPIXEL),
 126                                NULL);
 127     }
 128     else  /* Memory DC */
 129     {
 130         DIBSECTION dib;
 131         HBITMAP bitmap = GetCurrentObject( hdc, OBJ_BITMAP );
 132         INT size = GetObjectW( bitmap, sizeof(dib), &dib );
 133
 134         if (!size) return 0;
 135
 136         if (size == sizeof(BITMAP))
 137         {
 138             /* A device-dependent bitmap is selected in the DC */
 139             hbmpRet = CreateBitmap(width, height,
 140                                    dib.dsBm.bmPlanes,
 141                                    dib.dsBm.bmBitsPixel,
 142                                    NULL);
 143         }
 144         else
 145         {
 146             /* A DIB section is selected in the DC */
 147             BITMAPINFO *bi;
 148             void *bits;
 149
 150             /* Allocate memory for a BITMAPINFOHEADER structure and a
 151                color table. The maximum number of colors in a color table
 152                is 256 which corresponds to a bitmap with depth 8.
 153                Bitmaps with higher depths don't have color tables. */
 154             bi = HeapAlloc(GetProcessHeap(), 0, sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD));
 155
 156             if (bi)
 157             {
 158                 bi->bmiHeader.biSize          = sizeof(bi->bmiHeader);
 159                 bi->bmiHeader.biWidth         = width;
 160                 bi->bmiHeader.biHeight        = height;
 161                 bi->bmiHeader.biPlanes        = dib.dsBmih.biPlanes;
 162                 bi->bmiHeader.biBitCount      = dib.dsBmih.biBitCount;
 163                 bi->bmiHeader.biCompression   = dib.dsBmih.biCompression;
 164                 bi->bmiHeader.biSizeImage     = 0;
 165                 bi->bmiHeader.biXPelsPerMeter = dib.dsBmih.biXPelsPerMeter;
 166                 bi->bmiHeader.biYPelsPerMeter = dib.dsBmih.biYPelsPerMeter;
 167                 bi->bmiHeader.biClrUsed       = dib.dsBmih.biClrUsed;
 168                 bi->bmiHeader.biClrImportant  = dib.dsBmih.biClrImportant;
 169
 170                 if (bi->bmiHeader.biCompression == BI_BITFIELDS)
 171                 {
 172                     /* Copy the color masks */
 173                     CopyMemory(bi->bmiColors, dib.dsBitfields, 3 * sizeof(DWORD));
 174                 }
 175                 else if (bi->bmiHeader.biBitCount <= 8)
 176                 {
 177                     /* Copy the color table */
 178                     GetDIBColorTable(hdc, 0, 256, bi->bmiColors);
 179                 }
 180
 181                 hbmpRet = CreateDIBSection(hdc, bi, DIB_RGB_COLORS, &bits, NULL, 0);
 182                 HeapFree(GetProcessHeap(), 0, bi);
 183             }
 184         }
 185     }
 186
 187     TRACE("\t\t%p\n", hbmpRet);
 188     return hbmpRet;
 189 }
 190
 191
 192 /******************************************************************************
 193  * CreateBitmapIndirect [GDI32.@]
 194  *
 195  * Creates a bitmap with the specified info.
 196  *
 197  * PARAMS
 198  *  bmp [I] Pointer to the bitmap info describing the bitmap
 199  *
 200  * RETURNS
 201  *    Success: Handle to bitmap
 202  *    Failure: NULL. Use GetLastError() to determine the cause.
 203  *
 204  * NOTES
 205  *  If a width or height of 0 are given, a 1x1 monochrome bitmap is returned.
 206  */
 207 HBITMAP WINAPI CreateBitmapIndirect( const BITMAP *bmp )
 208 {
 209     BITMAP bm;
 210     BITMAPOBJ *bmpobj;
 211     HBITMAP hbitmap;
 212
 213     if (!bmp || bmp->bmType)
 214     {
 215         SetLastError( ERROR_INVALID_PARAMETER );
 216         return NULL;
 217     }
 218
 219     if (bmp->bmWidth > 0x7ffffff || bmp->bmHeight > 0x7ffffff)
 220     {
 221         SetLastError( ERROR_INVALID_PARAMETER );
 222         return 0;
 223     }
 224
 225     bm = *bmp;
 226
 227     if (!bm.bmWidth || !bm.bmHeight)
 228     {
 229         return GetStockObject( DEFAULT_BITMAP );
 230     }
 231     else
 232     {
 233         if (bm.bmHeight < 0)
 234             bm.bmHeight = -bm.bmHeight;
 235         if (bm.bmWidth < 0)
 236             bm.bmWidth = -bm.bmWidth;
 237     }
 238
 239     if (bm.bmPlanes != 1)
 240     {
 241         FIXME("planes = %d\n", bm.bmPlanes);
 242         SetLastError( ERROR_INVALID_PARAMETER );
 243         return NULL;
 244     }
 245
 246     /* Windows only uses 1, 4, 8, 16, 24 and 32 bpp */
 247     if(bm.bmBitsPixel == 1)         bm.bmBitsPixel = 1;
 248     else if(bm.bmBitsPixel <= 4)    bm.bmBitsPixel = 4;
 249     else if(bm.bmBitsPixel <= 8)    bm.bmBitsPixel = 8;
 250     else if(bm.bmBitsPixel <= 16)   bm.bmBitsPixel = 16;
 251     else if(bm.bmBitsPixel <= 24)   bm.bmBitsPixel = 24;
 252     else if(bm.bmBitsPixel <= 32)   bm.bmBitsPixel = 32;
 253     else {
 254         WARN("Invalid bmBitsPixel %d, returning ERROR_INVALID_PARAMETER\n", bm.bmBitsPixel);
 255         SetLastError(ERROR_INVALID_PARAMETER);
 256         return NULL;
 257     }
 258
 259     /* Windows ignores the provided bm.bmWidthBytes */
 260     bm.bmWidthBytes = get_bitmap_stride( bm.bmWidth, bm.bmBitsPixel );
 261     /* XP doesn't allow to create bitmaps larger than 128 Mb */
 262     if (bm.bmHeight > 128 * 1024 * 1024 / bm.bmWidthBytes)
 263     {
 264         SetLastError( ERROR_NOT_ENOUGH_MEMORY );
 265         return 0;
 266     }
 267
 268     /* Create the BITMAPOBJ */
 269     if (!(bmpobj = HeapAlloc( GetProcessHeap(), 0, sizeof(*bmpobj) )))
 270     {
 271         SetLastError( ERROR_NOT_ENOUGH_MEMORY );
 272         return 0;
 273     }
 274
 275     bmpobj->size.cx = 0;
 276     bmpobj->size.cy = 0;
 277     bmpobj->bitmap = bm;
 278     bmpobj->bitmap.bmBits = NULL;
 279     bmpobj->funcs = &null_driver;
 280     bmpobj->dib = NULL;
 281     bmpobj->color_table = NULL;
 282     bmpobj->nb_colors = 0;
 283
 284     if (!(hbitmap = alloc_gdi_handle( &bmpobj->header, OBJ_BITMAP, &bitmap_funcs )))
 285     {
 286         HeapFree( GetProcessHeap(), 0, bmpobj );
 287         return 0;
 288     }
 289
 290     if (bm.bmBits)
 291         SetBitmapBits( hbitmap, bm.bmHeight * bm.bmWidthBytes, bm.bmBits );
 292
 293     TRACE("%dx%d, bpp %d planes %d: returning %p\n", bm.bmWidth, bm.bmHeight,
 294           bm.bmBitsPixel, bm.bmPlanes, hbitmap);
 295
 296     return hbitmap;
 297 }
 298
 299
 300 /* convenience wrapper for GetImage to retrieve the full contents of a bitmap */
 301 BOOL get_bitmap_image( HBITMAP hbitmap, BITMAPINFO *info, struct gdi_image_bits *bits )
 302 {
 303     struct bitblt_coords src;
 304     BOOL ret = FALSE;
 305     BITMAPOBJ *bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
 306
 307     if (bmp)
 308     {
 309         const struct gdi_dc_funcs *funcs = get_bitmap_funcs( bmp );
 310         src.visrect.left   = src.x = 0;
 311         src.visrect.top    = src.y = 0;
 312         src.visrect.right  = src.width = bmp->bitmap.bmWidth;
 313         src.visrect.bottom = src.height = bmp->bitmap.bmHeight;
 314         ret = !funcs->pGetImage( NULL, hbitmap, info, bits, &src );
 315         GDI_ReleaseObj( hbitmap );
 316     }
 317     return ret;
 318 }
 319
 320
 321 /***********************************************************************
 322  * GetBitmapBits [GDI32.@]
 323  *
 324  * Copies bitmap bits of bitmap to buffer.
 325  *
 326  * RETURNS
 327  *    Success: Number of bytes copied
 328  *    Failure: 0
 329  */
 330 LONG WINAPI GetBitmapBits(
 331     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 332     LONG count,        /* [in]  Number of bytes to copy */
 333     LPVOID bits)       /* [out] Pointer to buffer to receive bits */
 334 {
 335     char buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
 336     BITMAPINFO *info = (BITMAPINFO *)buffer;
 337     struct gdi_image_bits src_bits;
 338     struct bitblt_coords src;
 339     int dst_stride, max, ret;
 340     BITMAPOBJ *bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
 341     const struct gdi_dc_funcs *funcs;
 342
 343     if (!bmp) return 0;
 344     funcs = get_bitmap_funcs( bmp );
 345
 346     if (bmp->dib) dst_stride = get_bitmap_stride( bmp->dib->dsBmih.biWidth, bmp->dib->dsBmih.biBitCount );
 347     else dst_stride = get_bitmap_stride( bmp->bitmap.bmWidth, bmp->bitmap.bmBitsPixel );
 348
 349     ret = max = dst_stride * bmp->bitmap.bmHeight;
 350     if (!bits) goto done;
 351     if (count > max) count = max;
 352     ret = count;
 353
 354     src.visrect.left = 0;
 355     src.visrect.right = bmp->bitmap.bmWidth;
 356     src.visrect.top = 0;
 357     src.visrect.bottom = (count + dst_stride - 1) / dst_stride;
 358     src.x = src.y = 0;
 359     src.width = src.visrect.right - src.visrect.left;
 360     src.height = src.visrect.bottom - src.visrect.top;
 361
 362     if (!funcs->pGetImage( NULL, hbitmap, info, &src_bits, &src ))
 363     {
 364         const char *src_ptr = src_bits.ptr;
 365         int src_stride = get_dib_stride( info->bmiHeader.biWidth, info->bmiHeader.biBitCount );
 366
 367         /* GetBitmapBits returns 16-bit aligned data */
 368
 369         if (info->bmiHeader.biHeight > 0)
 370         {
 371             src_ptr += (info->bmiHeader.biHeight - 1) * src_stride;
 372             src_stride = -src_stride;
 373         }
 374         src_ptr += src.visrect.top * src_stride;
 375
 376         if (src_stride == dst_stride) memcpy( bits, src_ptr, count );
 377         else while (count > 0)
 378         {
 379             memcpy( bits, src_ptr, min( count, dst_stride ) );
 380             src_ptr += src_stride;
 381             bits = (char *)bits + dst_stride;
 382             count -= dst_stride;
 383         }
 384         if (src_bits.free) src_bits.free( &src_bits );
 385     }
 386     else ret = 0;
 387
 388 done:
 389     GDI_ReleaseObj( hbitmap );
 390     return ret;
 391 }
 392
 393
 394 /******************************************************************************
 395  * SetBitmapBits [GDI32.@]
 396  *
 397  * Sets bits of color data for a bitmap.
 398  *
 399  * RETURNS
 400  *    Success: Number of bytes used in setting the bitmap bits
 401  *    Failure: 0
 402  */
 403 LONG WINAPI SetBitmapBits(
 404     HBITMAP hbitmap, /* [in] Handle to bitmap */
 405     LONG count,        /* [in] Number of bytes in bitmap array */
 406     LPCVOID bits)      /* [in] Address of array with bitmap bits */
 407 {
 408     char buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
 409     BITMAPINFO *info = (BITMAPINFO *)buffer;
 410     BITMAPOBJ *bmp;
 411     DWORD err;
 412     int i, src_stride, dst_stride;
 413     struct bitblt_coords src, dst;
 414     struct gdi_image_bits src_bits;
 415     HRGN clip = NULL;
 416     const struct gdi_dc_funcs *funcs;
 417
 418     if (!bits) return 0;
 419
 420     bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
 421     if (!bmp) return 0;
 422
 423     funcs = get_bitmap_funcs( bmp );
 424
 425     if (count < 0) {
 426         WARN("(%d): Negative number of bytes passed???\n", count );
 427         count = -count;
 428     }
 429
 430     if (bmp->dib) src_stride = get_bitmap_stride( bmp->dib->dsBmih.biWidth, bmp->dib->dsBmih.biBitCount );
 431     else src_stride = get_bitmap_stride( bmp->bitmap.bmWidth, bmp->bitmap.bmBitsPixel );
 432     count = min( count, src_stride * bmp->bitmap.bmHeight );
 433
 434     dst_stride = get_dib_stride( bmp->bitmap.bmWidth, bmp->bitmap.bmBitsPixel );
 435
 436     src.visrect.left   = src.x = 0;
 437     src.visrect.top    = src.y = 0;
 438     src.visrect.right  = src.width = bmp->bitmap.bmWidth;
 439     src.visrect.bottom = src.height = (count + src_stride - 1 ) / src_stride;
 440     dst = src;
 441
 442     if (count % src_stride)
 443     {
 444         HRGN last_row;
 445         int extra_pixels = ((count % src_stride) << 3) / bmp->bitmap.bmBitsPixel;
 446
 447         if ((count % src_stride << 3) % bmp->bitmap.bmBitsPixel)
 448             FIXME( "Unhandled partial pixel\n" );
 449         clip = CreateRectRgn( src.visrect.left, src.visrect.top,
 450                               src.visrect.right, src.visrect.bottom - 1 );
 451         last_row = CreateRectRgn( src.visrect.left, src.visrect.bottom - 1,
 452                                   src.visrect.left + extra_pixels, src.visrect.bottom );
 453         CombineRgn( clip, clip, last_row, RGN_OR );
 454         DeleteObject( last_row );
 455     }
 456
 457     TRACE("(%p, %d, %p) %dx%d %d bpp fetched height: %d\n",
 458           hbitmap, count, bits, bmp->bitmap.bmWidth, bmp->bitmap.bmHeight,
 459           bmp->bitmap.bmBitsPixel, src.height );
 460
 461     if (src_stride == dst_stride)
 462     {
 463         src_bits.ptr = (void *)bits;
 464         src_bits.is_copy = FALSE;
 465         src_bits.free = NULL;
 466     }
 467     else
 468     {
 469         if (!(src_bits.ptr = HeapAlloc( GetProcessHeap(), 0, dst.height * dst_stride )))
 470         {
 471             GDI_ReleaseObj( hbitmap );
 472             return 0;
 473         }
 474         src_bits.is_copy = TRUE;
 475         src_bits.free = free_heap_bits;
 476         for (i = 0; i < count / src_stride; i++)
 477             memcpy( (char *)src_bits.ptr + i * dst_stride, (char *)bits + i * src_stride, src_stride );
 478         if (count % src_stride)
 479             memcpy( (char *)src_bits.ptr + i * dst_stride, (char *)bits + i * src_stride, count % src_stride );
 480     }
 481
 482     /* query the color info */
 483     info->bmiHeader.biSize          = sizeof(info->bmiHeader);
 484     info->bmiHeader.biPlanes        = 1;
 485     info->bmiHeader.biBitCount      = bmp->bitmap.bmBitsPixel;
 486     info->bmiHeader.biCompression   = BI_RGB;
 487     info->bmiHeader.biXPelsPerMeter = 0;
 488     info->bmiHeader.biYPelsPerMeter = 0;
 489     info->bmiHeader.biClrUsed       = 0;
 490     info->bmiHeader.biClrImportant  = 0;
 491     info->bmiHeader.biWidth         = 0;
 492     info->bmiHeader.biHeight        = 0;
 493     info->bmiHeader.biSizeImage     = 0;
 494     err = funcs->pPutImage( NULL, hbitmap, 0, info, NULL, NULL, NULL, SRCCOPY );
 495
 496     if (!err || err == ERROR_BAD_FORMAT)
 497     {
 498         info->bmiHeader.biPlanes        = 1;
 499         info->bmiHeader.biBitCount      = bmp->bitmap.bmBitsPixel;
 500         info->bmiHeader.biWidth         = bmp->bitmap.bmWidth;
 501         info->bmiHeader.biHeight        = -dst.height;
 502         info->bmiHeader.biSizeImage     = dst.height * dst_stride;
 503         err = funcs->pPutImage( NULL, hbitmap, clip, info, &src_bits, &src, &dst, SRCCOPY );
 504     }
 505     if (err) count = 0;
 506
 507     if (clip) DeleteObject( clip );
 508     if (src_bits.free) src_bits.free( &src_bits );
 509     GDI_ReleaseObj( hbitmap );
 510     return count;
 511 }
 512
 513 /**********************************************************************
 514  *              BITMAP_CopyBitmap
 515  *
 516  */
 517 HBITMAP BITMAP_CopyBitmap(HBITMAP hbitmap)
 518 {
 519     HBITMAP res;
 520     DIBSECTION dib;
 521     BITMAPOBJ *bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
 522
 523     if (!bmp) return 0;
 524     if (bmp->dib)
 525     {
 526         void *bits;
 527         BITMAPINFO *bi;
 528         HDC dc;
 529
 530         dib = *bmp->dib;
 531         GDI_ReleaseObj( hbitmap );
 532         dc = CreateCompatibleDC( NULL );
 533
 534         if (!dc) return 0;
 535         if (!(bi = HeapAlloc(GetProcessHeap(), 0, FIELD_OFFSET( BITMAPINFO, bmiColors[256] ))))
 536         {
 537             DeleteDC( dc );
 538             return 0;
 539         }
 540         bi->bmiHeader = dib.dsBmih;
 541
 542         /* Get the color table or the color masks */
 543         GetDIBits( dc, hbitmap, 0, 0, NULL, bi, DIB_RGB_COLORS );
 544         bi->bmiHeader.biHeight = dib.dsBmih.biHeight;
 545
 546         res = CreateDIBSection( dc, bi, DIB_RGB_COLORS, &bits, NULL, 0 );
 547         if (res) SetDIBits( dc, res, 0, dib.dsBm.bmHeight, dib.dsBm.bmBits, bi, DIB_RGB_COLORS );
 548         HeapFree( GetProcessHeap(), 0, bi );
 549         DeleteDC( dc );
 550         return res;
 551     }
 552     dib.dsBm = bmp->bitmap;
 553     dib.dsBm.bmBits = NULL;
 554     GDI_ReleaseObj( hbitmap );
 555
 556     res = CreateBitmapIndirect( &dib.dsBm );
 557     if(res) {
 558         char *buf = HeapAlloc( GetProcessHeap(), 0, dib.dsBm.bmWidthBytes * dib.dsBm.bmHeight );
 559         GetBitmapBits (hbitmap, dib.dsBm.bmWidthBytes * dib.dsBm.bmHeight, buf);
 560         SetBitmapBits (res, dib.dsBm.bmWidthBytes * dib.dsBm.bmHeight, buf);
 561         HeapFree( GetProcessHeap(), 0, buf );
 562     }
 563     return res;
 564 }
 565
 566
 567 static void set_initial_bitmap_bits( HBITMAP hbitmap, BITMAPOBJ *bmp )
 568 {
 569     char buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
 570     BITMAPINFO *info = (BITMAPINFO *)buffer;
 571
 572     if (!bmp->bitmap.bmBits) return;
 573     if (bmp->funcs->pPutImage == nulldrv_PutImage) return;
 574
 575     get_ddb_bitmapinfo( bmp, info );
 576     SetDIBits( 0, hbitmap, 0, bmp->bitmap.bmHeight, bmp->bitmap.bmBits, info, DIB_RGB_COLORS );
 577 }
 578
 579 /***********************************************************************
 580  *           BITMAP_SetOwnerDC
 581  *
 582  * Set the type of DC that owns the bitmap. This is used when the
 583  * bitmap is selected into a device to initialize the bitmap function
 584  * table.
 585  */
 586 BOOL BITMAP_SetOwnerDC( HBITMAP hbitmap, PHYSDEV physdev )
 587 {
 588     BITMAPOBJ *bitmap;
 589     BOOL ret = TRUE;
 590
 591     /* never set the owner of the stock bitmap since it can be selected in multiple DCs */
 592     if (hbitmap == GetStockObject(DEFAULT_BITMAP)) return TRUE;
 593
 594     if (!(bitmap = GDI_GetObjPtr( hbitmap, OBJ_BITMAP ))) return FALSE;
 595
 596     if (!bitmap->dib && bitmap->funcs != physdev->funcs)
 597     {
 598         /* we can only change from the null driver to some other driver */
 599         if (bitmap->funcs == &null_driver)
 600         {
 601             if (physdev->funcs->pCreateBitmap)
 602             {
 603                 ret = physdev->funcs->pCreateBitmap( physdev, hbitmap );
 604                 if (ret)
 605                 {
 606                     bitmap->funcs = physdev->funcs;
 607                     set_initial_bitmap_bits( hbitmap, bitmap );
 608                 }
 609             }
 610             else bitmap->funcs = &dib_driver;  /* use the DIB driver to emulate DDB support */
 611         }
 612         else
 613         {
 614             FIXME( "Trying to select bitmap %p in different DC type\n", hbitmap );
 615             ret = FALSE;
 616         }
 617     }
 618     GDI_ReleaseObj( hbitmap );
 619     return ret;
 620 }
 621
 622
 623 /***********************************************************************
 624  *           BITMAP_SelectObject
 625  */
 626 static HGDIOBJ BITMAP_SelectObject( HGDIOBJ handle, HDC hdc )
 627 {
 628     HGDIOBJ ret;
 629     BITMAPOBJ *bitmap;
 630     DC *dc;
 631     PHYSDEV physdev = NULL, old_physdev = NULL, pathdev = NULL;
 632
 633     if (!(dc = get_dc_ptr( hdc ))) return 0;
 634
 635     if (GetObjectType( hdc ) != OBJ_MEMDC)
 636     {
 637         ret = 0;
 638         goto done;
 639     }
 640     ret = dc->hBitmap;
 641     if (handle == dc->hBitmap) goto done;  /* nothing to do */
 642
 643     if (!(bitmap = GDI_GetObjPtr( handle, OBJ_BITMAP )))
 644     {
 645         ret = 0;
 646         goto done;
 647     }
 648
 649     if (bitmap->header.selcount && (handle != GetStockObject(DEFAULT_BITMAP)))
 650     {
 651         WARN( "Bitmap already selected in another DC\n" );
 652         GDI_ReleaseObj( handle );
 653         ret = 0;
 654         goto done;
 655     }
 656
 657     if (dc->physDev->funcs == &path_driver) pathdev = pop_dc_driver( &dc->physDev );
 658
 659     old_physdev = GET_DC_PHYSDEV( dc, pSelectBitmap );
 660     if(old_physdev == dc->dibdrv)
 661         old_physdev = pop_dc_driver( &dc->physDev );
 662
 663     physdev = GET_DC_PHYSDEV( dc, pSelectBitmap );
 664     if (bitmap->dib || physdev->funcs == &null_driver)
 665     {
 666         physdev = dc->dibdrv;
 667         if (physdev) push_dc_driver( &dc->physDev, physdev, physdev->funcs );
 668         else
 669         {
 670             if (!dib_driver.pCreateDC( &dc->physDev, NULL, NULL, NULL, NULL )) goto done;
 671             dc->dibdrv = physdev = dc->physDev;
 672         }
 673     }
 674
 675     if (!BITMAP_SetOwnerDC( handle, physdev ))
 676     {
 677         GDI_ReleaseObj( handle );
 678         ret = 0;
 679         goto done;
 680     }
 681     if (!physdev->funcs->pSelectBitmap( physdev, handle ))
 682     {
 683         GDI_ReleaseObj( handle );
 684         ret = 0;
 685     }
 686     else
 687     {
 688         dc->hBitmap = handle;
 689         GDI_inc_ref_count( handle );
 690         dc->dirty = 0;
 691         dc->vis_rect.left   = 0;
 692         dc->vis_rect.top    = 0;
 693         dc->vis_rect.right  = bitmap->bitmap.bmWidth;
 694         dc->vis_rect.bottom = bitmap->bitmap.bmHeight;
 695         SetRectRgn( dc->hVisRgn, 0, 0, bitmap->bitmap.bmWidth, bitmap->bitmap.bmHeight);
 696         GDI_ReleaseObj( handle );
 697         DC_InitDC( dc );
 698         GDI_dec_ref_count( ret );
 699     }
 700
 701  done:
 702     if(!ret)
 703     {
 704         if (physdev && physdev == dc->dibdrv)
 705             pop_dc_driver( &dc->physDev );
 706         if (old_physdev && old_physdev == dc->dibdrv)
 707             push_dc_driver( &dc->physDev, old_physdev, old_physdev->funcs );
 708     }
 709     if (pathdev) push_dc_driver( &dc->physDev, pathdev, pathdev->funcs );
 710     release_dc_ptr( dc );
 711     return ret;
 712 }
 713
 714
 715 /***********************************************************************
 716  *           BITMAP_DeleteObject
 717  */
 718 static BOOL BITMAP_DeleteObject( HGDIOBJ handle )
 719 {
 720     const struct gdi_dc_funcs *funcs;
 721     BITMAPOBJ *bmp = GDI_GetObjPtr( handle, OBJ_BITMAP );
 722
 723     if (!bmp) return FALSE;
 724     funcs = bmp->funcs;
 725     GDI_ReleaseObj( handle );
 726
 727     funcs->pDeleteBitmap( handle );
 728
 729     if (!(bmp = free_gdi_handle( handle ))) return FALSE;
 730
 731     HeapFree( GetProcessHeap(), 0, bmp->bitmap.bmBits );
 732
 733     if (bmp->dib)
 734     {
 735         DIBSECTION *dib = bmp->dib;
 736
 737         if (dib->dsBm.bmBits)
 738         {
 739             if (dib->dshSection)
 740             {
 741                 SYSTEM_INFO SystemInfo;
 742                 GetSystemInfo( &SystemInfo );
 743                 UnmapViewOfFile( (char *)dib->dsBm.bmBits -
 744                                  (dib->dsOffset % SystemInfo.dwAllocationGranularity) );
 745             }
 746             else if (!dib->dsOffset)
 747                 VirtualFree(dib->dsBm.bmBits, 0L, MEM_RELEASE );
 748         }
 749         HeapFree(GetProcessHeap(), 0, dib);
 750         HeapFree(GetProcessHeap(), 0, bmp->color_table);
 751     }
 752     return HeapFree( GetProcessHeap(), 0, bmp );
 753 }
 754
 755
 756 /***********************************************************************
 757  *           BITMAP_GetObject
 758  */
 759 static INT BITMAP_GetObject( HGDIOBJ handle, INT count, LPVOID buffer )
 760 {
 761     INT ret;
 762     BITMAPOBJ *bmp = GDI_GetObjPtr( handle, OBJ_BITMAP );
 763
 764     if (!bmp) return 0;
 765
 766     if (!buffer) ret = sizeof(BITMAP);
 767     else if (count < sizeof(BITMAP)) ret = 0;
 768     else if (bmp->dib)
 769     {
 770         if (count >= sizeof(DIBSECTION))
 771         {
 772             DIBSECTION *dib = buffer;
 773             *dib = *bmp->dib;
 774             dib->dsBmih.biHeight = abs( dib->dsBmih.biHeight );
 775             ret = sizeof(DIBSECTION);
 776         }
 777         else /* if (count >= sizeof(BITMAP)) */
 778         {
 779             DIBSECTION *dib = bmp->dib;
 780             memcpy( buffer, &dib->dsBm, sizeof(BITMAP) );
 781             ret = sizeof(BITMAP);
 782         }
 783     }
 784     else
 785     {
 786         memcpy( buffer, &bmp->bitmap, sizeof(BITMAP) );
 787         ((BITMAP *) buffer)->bmBits = NULL;
 788         ret = sizeof(BITMAP);
 789     }
 790     GDI_ReleaseObj( handle );
 791     return ret;
 792 }
 793
 794
 795 /******************************************************************************
 796  * CreateDiscardableBitmap [GDI32.@]
 797  *
 798  * Creates a discardable bitmap.
 799  *
 800  * RETURNS
 801  *    Success: Handle to bitmap
 802  *    Failure: NULL
 803  */
 804 HBITMAP WINAPI CreateDiscardableBitmap(
 805     HDC hdc,    /* [in] Handle to device context */
 806     INT width,  /* [in] Bitmap width */
 807     INT height) /* [in] Bitmap height */
 808 {
 809     return CreateCompatibleBitmap( hdc, width, height );
 810 }
 811
 812
 813 /******************************************************************************
 814  * GetBitmapDimensionEx [GDI32.@]
 815  *
 816  * Retrieves dimensions of a bitmap.
 817  *
 818  * RETURNS
 819  *    Success: TRUE
 820  *    Failure: FALSE
 821  */
 822 BOOL WINAPI GetBitmapDimensionEx(
 823     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 824     LPSIZE size)     /* [out] Address of struct receiving dimensions */
 825 {
 826     BITMAPOBJ * bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
 827     if (!bmp) return FALSE;
 828     *size = bmp->size;
 829     GDI_ReleaseObj( hbitmap );
 830     return TRUE;
 831 }
 832
 833
 834 /******************************************************************************
 835  * SetBitmapDimensionEx [GDI32.@]
 836  *
 837  * Assigns dimensions to a bitmap.
 838  * MSDN says that this function will fail if hbitmap is a handle created by
 839  * CreateDIBSection, but that's not true on Windows 2000.
 840  *
 841  * RETURNS
 842  *    Success: TRUE
 843  *    Failure: FALSE
 844  */
 845 BOOL WINAPI SetBitmapDimensionEx(
 846     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 847     INT x,           /* [in]  Bitmap width */
 848     INT y,           /* [in]  Bitmap height */
 849     LPSIZE prevSize) /* [out] Address of structure for orig dims */
 850 {
 851     BITMAPOBJ * bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
 852     if (!bmp) return FALSE;
 853     if (prevSize) *prevSize = bmp->size;
 854     bmp->size.cx = x;
 855     bmp->size.cy = y;
 856     GDI_ReleaseObj( hbitmap );
 857     return TRUE;
 858 }