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