4 * Copyright 1993 Alexandre Julliard
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.
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.
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
29 #include "gdi_private.h"
30 #include "wine/debug.h"
32 WINE_DEFAULT_DEBUG_CHANNEL(bitmap);
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 );
39 static const struct gdi_obj_funcs bitmap_funcs =
41 BITMAP_SelectObject, /* pSelectObject */
42 BITMAP_GetObject, /* pGetObjectA */
43 BITMAP_GetObject, /* pGetObjectW */
44 NULL, /* pUnrealizeObject */
45 BITMAP_DeleteObject /* pDeleteObject */
49 /***********************************************************************
50 * null driver fallback implementations
53 DWORD nulldrv_GetImage( PHYSDEV dev, HBITMAP hbitmap, BITMAPINFO *info,
54 struct gdi_image_bits *bits, struct bitblt_coords *src )
56 if (!hbitmap) return ERROR_NOT_SUPPORTED;
57 return dib_driver.pGetImage( 0, hbitmap, info, bits, src );
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 )
64 if (!hbitmap) return ERROR_SUCCESS;
65 return dib_driver.pPutImage( NULL, hbitmap, clip, info, bits, src, dst, rop );
68 BOOL nulldrv_CopyBitmap( HBITMAP src, HBITMAP dst )
71 BITMAPOBJ *src_bmp = GDI_GetObjPtr( src, OBJ_BITMAP );
73 if (!src_bmp) return FALSE;
74 if (src_bmp->bitmap.bmBits)
76 BITMAPOBJ *dst_bmp = GDI_GetObjPtr( dst, OBJ_BITMAP );
77 int stride = get_dib_stride( dst_bmp->bitmap.bmWidth, dst_bmp->bitmap.bmBitsPixel );
78 dst_bmp->bitmap.bmBits = HeapAlloc( GetProcessHeap(), 0, dst_bmp->bitmap.bmHeight * stride );
79 if (dst_bmp->bitmap.bmBits)
80 memcpy( dst_bmp->bitmap.bmBits, src_bmp->bitmap.bmBits, dst_bmp->bitmap.bmHeight * stride );
83 GDI_ReleaseObj( dst );
85 GDI_ReleaseObj( src );
90 /******************************************************************************
91 * CreateBitmap [GDI32.@]
93 * Creates a bitmap with the specified info.
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
103 * Success: Handle to bitmap
106 HBITMAP WINAPI CreateBitmap( INT width, INT height, UINT planes,
107 UINT bpp, LPCVOID bits )
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;
119 return CreateBitmapIndirect( &bm );
122 /******************************************************************************
123 * CreateCompatibleBitmap [GDI32.@]
125 * Creates a bitmap compatible with the DC.
128 * hdc [I] Handle to device context
129 * width [I] Width of bitmap
130 * height [I] Height of bitmap
133 * Success: Handle to bitmap
136 HBITMAP WINAPI CreateCompatibleBitmap( HDC hdc, INT width, INT height)
140 TRACE("(%p,%d,%d) =\n", hdc, width, height);
142 if (GetObjectType( hdc ) != OBJ_MEMDC)
144 hbmpRet = CreateBitmap(width, height,
145 GetDeviceCaps(hdc, PLANES),
146 GetDeviceCaps(hdc, BITSPIXEL),
152 HBITMAP bitmap = GetCurrentObject( hdc, OBJ_BITMAP );
153 INT size = GetObjectW( bitmap, sizeof(dib), &dib );
157 if (size == sizeof(BITMAP))
159 /* A device-dependent bitmap is selected in the DC */
160 hbmpRet = CreateBitmap(width, height,
162 dib.dsBm.bmBitsPixel,
167 /* A DIB section is selected in the DC */
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));
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;
191 if (bi->bmiHeader.biCompression == BI_BITFIELDS)
193 /* Copy the color masks */
194 CopyMemory(bi->bmiColors, dib.dsBitfields, 3 * sizeof(DWORD));
196 else if (bi->bmiHeader.biBitCount <= 8)
198 /* Copy the color table */
199 GetDIBColorTable(hdc, 0, 256, bi->bmiColors);
202 hbmpRet = CreateDIBSection(hdc, bi, DIB_RGB_COLORS, &bits, NULL, 0);
203 HeapFree(GetProcessHeap(), 0, bi);
208 TRACE("\t\t%p\n", hbmpRet);
213 /******************************************************************************
214 * CreateBitmapIndirect [GDI32.@]
216 * Creates a bitmap with the specified info.
219 * bmp [I] Pointer to the bitmap info describing the bitmap
222 * Success: Handle to bitmap
223 * Failure: NULL. Use GetLastError() to determine the cause.
226 * If a width or height of 0 are given, a 1x1 monochrome bitmap is returned.
228 HBITMAP WINAPI CreateBitmapIndirect( const BITMAP *bmp )
234 if (!bmp || bmp->bmType)
236 SetLastError( ERROR_INVALID_PARAMETER );
240 if (bmp->bmWidth > 0x7ffffff || bmp->bmHeight > 0x7ffffff)
242 SetLastError( ERROR_INVALID_PARAMETER );
248 if (!bm.bmWidth || !bm.bmHeight)
250 return GetStockObject( DEFAULT_BITMAP );
255 bm.bmHeight = -bm.bmHeight;
257 bm.bmWidth = -bm.bmWidth;
260 if (bm.bmPlanes != 1)
262 FIXME("planes = %d\n", bm.bmPlanes);
263 SetLastError( ERROR_INVALID_PARAMETER );
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;
275 WARN("Invalid bmBitsPixel %d, returning ERROR_INVALID_PARAMETER\n", bm.bmBitsPixel);
276 SetLastError(ERROR_INVALID_PARAMETER);
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)
285 SetLastError( ERROR_NOT_ENOUGH_MEMORY );
289 /* Create the BITMAPOBJ */
290 if (!(bmpobj = HeapAlloc( GetProcessHeap(), 0, sizeof(*bmpobj) )))
292 SetLastError( ERROR_NOT_ENOUGH_MEMORY );
299 bmpobj->bitmap.bmBits = NULL;
300 bmpobj->funcs = &null_driver;
302 bmpobj->color_table = NULL;
303 bmpobj->nb_colors = 0;
305 if (!(hbitmap = alloc_gdi_handle( &bmpobj->header, OBJ_BITMAP, &bitmap_funcs )))
307 HeapFree( GetProcessHeap(), 0, bmpobj );
312 SetBitmapBits( hbitmap, bm.bmHeight * bm.bmWidthBytes, bm.bmBits );
314 TRACE("%dx%d, bpp %d planes %d: returning %p\n", bm.bmWidth, bm.bmHeight,
315 bm.bmBitsPixel, bm.bmPlanes, hbitmap);
321 /***********************************************************************
322 * GetBitmapBits [GDI32.@]
324 * Copies bitmap bits of bitmap to buffer.
327 * Success: Number of bytes copied
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 */
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;
344 funcs = get_bitmap_funcs( bmp );
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 );
349 ret = max = dst_stride * bmp->bitmap.bmHeight;
350 if (!bits) goto done;
351 if (count > max) count = max;
354 src.visrect.left = 0;
355 src.visrect.right = bmp->bitmap.bmWidth;
357 src.visrect.bottom = (count + dst_stride - 1) / dst_stride;
359 src.width = src.visrect.right - src.visrect.left;
360 src.height = src.visrect.bottom - src.visrect.top;
362 if (!funcs->pGetImage( NULL, hbitmap, info, &src_bits, &src ))
364 const char *src_ptr = src_bits.ptr;
365 int src_stride = get_dib_stride( info->bmiHeader.biWidth, info->bmiHeader.biBitCount );
367 /* GetBitmapBits returns 16-bit aligned data */
369 if (info->bmiHeader.biHeight > 0)
371 src_ptr += (info->bmiHeader.biHeight - 1) * src_stride;
372 src_stride = -src_stride;
374 src_ptr += src.visrect.top * src_stride;
376 if (src_stride == dst_stride) memcpy( bits, src_ptr, count );
377 else while (count > 0)
379 memcpy( bits, src_ptr, min( count, dst_stride ) );
380 src_ptr += src_stride;
381 bits = (char *)bits + dst_stride;
384 if (src_bits.free) src_bits.free( &src_bits );
389 GDI_ReleaseObj( hbitmap );
394 /******************************************************************************
395 * SetBitmapBits [GDI32.@]
397 * Sets bits of color data for a bitmap.
400 * Success: Number of bytes used in setting the bitmap bits
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 */
408 char buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
409 BITMAPINFO *info = (BITMAPINFO *)buffer;
412 int i, src_stride, dst_stride;
413 struct bitblt_coords src, dst;
414 struct gdi_image_bits src_bits;
416 const struct gdi_dc_funcs *funcs;
420 bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
423 funcs = get_bitmap_funcs( bmp );
426 WARN("(%d): Negative number of bytes passed???\n", count );
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 );
434 dst_stride = get_dib_stride( bmp->bitmap.bmWidth, bmp->bitmap.bmBitsPixel );
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;
442 if (count % src_stride)
445 int extra_pixels = ((count % src_stride) << 3) / bmp->bitmap.bmBitsPixel;
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 );
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 );
461 if (src_stride == dst_stride)
463 src_bits.ptr = (void *)bits;
464 src_bits.is_copy = FALSE;
465 src_bits.free = NULL;
469 if (!(src_bits.ptr = HeapAlloc( GetProcessHeap(), 0, dst.height * dst_stride )))
471 GDI_ReleaseObj( hbitmap );
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 );
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 );
496 if (!err || err == ERROR_BAD_FORMAT)
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 );
507 if (clip) DeleteObject( clip );
508 if (src_bits.free) src_bits.free( &src_bits );
509 GDI_ReleaseObj( hbitmap );
514 static void set_initial_bitmap_bits( HBITMAP hbitmap, BITMAPOBJ *bmp )
516 char src_bmibuf[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
517 BITMAPINFO *src_info = (BITMAPINFO *)src_bmibuf;
518 char dst_bmibuf[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
519 BITMAPINFO *dst_info = (BITMAPINFO *)dst_bmibuf;
521 struct gdi_image_bits bits;
522 struct bitblt_coords src, dst;
524 if (!bmp->bitmap.bmBits) return;
525 if (bmp->funcs->pPutImage == nulldrv_PutImage) return;
527 get_ddb_bitmapinfo( bmp, src_info );
529 bits.ptr = bmp->bitmap.bmBits;
530 bits.is_copy = FALSE;
536 src.width = bmp->bitmap.bmWidth;
537 src.height = bmp->bitmap.bmHeight;
538 src.visrect.left = 0;
540 src.visrect.right = bmp->bitmap.bmWidth;
541 src.visrect.bottom = bmp->bitmap.bmHeight;
544 copy_bitmapinfo( dst_info, src_info );
546 err = bmp->funcs->pPutImage( NULL, hbitmap, 0, dst_info, &bits, &src, &dst, 0 );
547 if (err == ERROR_BAD_FORMAT)
549 err = convert_bits( src_info, &src, dst_info, &bits, FALSE );
550 if (!err) err = bmp->funcs->pPutImage( NULL, hbitmap, 0, dst_info, &bits, &src, &dst, 0 );
551 if (bits.free) bits.free( &bits );
555 /***********************************************************************
558 * Set the type of DC that owns the bitmap. This is used when the
559 * bitmap is selected into a device to initialize the bitmap function
562 static BOOL BITMAP_SetOwnerDC( HBITMAP hbitmap, PHYSDEV physdev )
567 /* never set the owner of the stock bitmap since it can be selected in multiple DCs */
568 if (hbitmap == GetStockObject(DEFAULT_BITMAP)) return TRUE;
570 if (!(bitmap = GDI_GetObjPtr( hbitmap, OBJ_BITMAP ))) return FALSE;
572 if (!bitmap->dib && bitmap->funcs != physdev->funcs)
574 /* we can only change from the null driver to some other driver */
575 if (bitmap->funcs == &null_driver)
577 if (physdev->funcs->pCreateBitmap)
579 ret = physdev->funcs->pCreateBitmap( physdev, hbitmap );
582 bitmap->funcs = physdev->funcs;
583 set_initial_bitmap_bits( hbitmap, bitmap );
586 else bitmap->funcs = &dib_driver; /* use the DIB driver to emulate DDB support */
590 FIXME( "Trying to select bitmap %p in different DC type\n", hbitmap );
594 GDI_ReleaseObj( hbitmap );
599 /***********************************************************************
600 * BITMAP_SelectObject
602 static HGDIOBJ BITMAP_SelectObject( HGDIOBJ handle, HDC hdc )
607 PHYSDEV physdev = NULL, old_physdev = NULL, pathdev = NULL;
609 if (!(dc = get_dc_ptr( hdc ))) return 0;
611 if (GetObjectType( hdc ) != OBJ_MEMDC)
617 if (handle == dc->hBitmap) goto done; /* nothing to do */
619 if (!(bitmap = GDI_GetObjPtr( handle, OBJ_BITMAP )))
625 if (bitmap->header.selcount && (handle != GetStockObject(DEFAULT_BITMAP)))
627 WARN( "Bitmap already selected in another DC\n" );
628 GDI_ReleaseObj( handle );
633 if (dc->physDev->funcs == &path_driver) pathdev = pop_dc_driver( &dc->physDev );
635 old_physdev = GET_DC_PHYSDEV( dc, pSelectBitmap );
636 if(old_physdev == dc->dibdrv)
637 old_physdev = pop_dc_driver( &dc->physDev );
639 physdev = GET_DC_PHYSDEV( dc, pSelectBitmap );
640 if (bitmap->dib || physdev->funcs == &null_driver)
642 physdev = dc->dibdrv;
643 if (physdev) push_dc_driver( &dc->physDev, physdev, physdev->funcs );
646 if (!dib_driver.pCreateDC( &dc->physDev, NULL, NULL, NULL, NULL )) goto done;
647 dc->dibdrv = physdev = dc->physDev;
651 if (!BITMAP_SetOwnerDC( handle, physdev ))
653 GDI_ReleaseObj( handle );
657 if (!physdev->funcs->pSelectBitmap( physdev, handle ))
659 GDI_ReleaseObj( handle );
664 dc->hBitmap = handle;
665 GDI_inc_ref_count( handle );
667 dc->vis_rect.left = 0;
668 dc->vis_rect.top = 0;
669 dc->vis_rect.right = bitmap->bitmap.bmWidth;
670 dc->vis_rect.bottom = bitmap->bitmap.bmHeight;
671 GDI_ReleaseObj( handle );
673 GDI_dec_ref_count( ret );
679 if (physdev && physdev == dc->dibdrv)
680 pop_dc_driver( &dc->physDev );
681 if (old_physdev && old_physdev == dc->dibdrv)
682 push_dc_driver( &dc->physDev, old_physdev, old_physdev->funcs );
684 if (pathdev) push_dc_driver( &dc->physDev, pathdev, pathdev->funcs );
685 release_dc_ptr( dc );
690 /***********************************************************************
691 * BITMAP_DeleteObject
693 static BOOL BITMAP_DeleteObject( HGDIOBJ handle )
695 const struct gdi_dc_funcs *funcs;
696 BITMAPOBJ *bmp = GDI_GetObjPtr( handle, OBJ_BITMAP );
698 if (!bmp) return FALSE;
700 GDI_ReleaseObj( handle );
702 funcs->pDeleteBitmap( handle );
704 if (!(bmp = free_gdi_handle( handle ))) return FALSE;
706 HeapFree( GetProcessHeap(), 0, bmp->bitmap.bmBits );
710 DIBSECTION *dib = bmp->dib;
712 if (dib->dsBm.bmBits)
716 SYSTEM_INFO SystemInfo;
717 GetSystemInfo( &SystemInfo );
718 UnmapViewOfFile( (char *)dib->dsBm.bmBits -
719 (dib->dsOffset % SystemInfo.dwAllocationGranularity) );
721 else if (!dib->dsOffset)
722 VirtualFree(dib->dsBm.bmBits, 0L, MEM_RELEASE );
724 HeapFree(GetProcessHeap(), 0, dib);
725 HeapFree(GetProcessHeap(), 0, bmp->color_table);
727 return HeapFree( GetProcessHeap(), 0, bmp );
731 /***********************************************************************
734 static INT BITMAP_GetObject( HGDIOBJ handle, INT count, LPVOID buffer )
737 BITMAPOBJ *bmp = GDI_GetObjPtr( handle, OBJ_BITMAP );
741 if (!buffer) ret = sizeof(BITMAP);
742 else if (count < sizeof(BITMAP)) ret = 0;
745 if (count >= sizeof(DIBSECTION))
747 DIBSECTION *dib = buffer;
749 dib->dsBmih.biHeight = abs( dib->dsBmih.biHeight );
750 ret = sizeof(DIBSECTION);
752 else /* if (count >= sizeof(BITMAP)) */
754 DIBSECTION *dib = bmp->dib;
755 memcpy( buffer, &dib->dsBm, sizeof(BITMAP) );
756 ret = sizeof(BITMAP);
761 memcpy( buffer, &bmp->bitmap, sizeof(BITMAP) );
762 ((BITMAP *) buffer)->bmBits = NULL;
763 ret = sizeof(BITMAP);
765 GDI_ReleaseObj( handle );
770 /******************************************************************************
771 * CreateDiscardableBitmap [GDI32.@]
773 * Creates a discardable bitmap.
776 * Success: Handle to bitmap
779 HBITMAP WINAPI CreateDiscardableBitmap(
780 HDC hdc, /* [in] Handle to device context */
781 INT width, /* [in] Bitmap width */
782 INT height) /* [in] Bitmap height */
784 return CreateCompatibleBitmap( hdc, width, height );
788 /******************************************************************************
789 * GetBitmapDimensionEx [GDI32.@]
791 * Retrieves dimensions of a bitmap.
797 BOOL WINAPI GetBitmapDimensionEx(
798 HBITMAP hbitmap, /* [in] Handle to bitmap */
799 LPSIZE size) /* [out] Address of struct receiving dimensions */
801 BITMAPOBJ * bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
802 if (!bmp) return FALSE;
804 GDI_ReleaseObj( hbitmap );
809 /******************************************************************************
810 * SetBitmapDimensionEx [GDI32.@]
812 * Assigns dimensions to a bitmap.
813 * MSDN says that this function will fail if hbitmap is a handle created by
814 * CreateDIBSection, but that's not true on Windows 2000.
820 BOOL WINAPI SetBitmapDimensionEx(
821 HBITMAP hbitmap, /* [in] Handle to bitmap */
822 INT x, /* [in] Bitmap width */
823 INT y, /* [in] Bitmap height */
824 LPSIZE prevSize) /* [out] Address of structure for orig dims */
826 BITMAPOBJ * bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
827 if (!bmp) return FALSE;
828 if (prevSize) *prevSize = bmp->size;
831 GDI_ReleaseObj( hbitmap );