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 */
48 /***********************************************************************
49 * BITMAP_GetWidthBytes
51 * Return number of bytes taken by a scanline of 16-bit aligned Windows DDB
54 INT BITMAP_GetWidthBytes( INT bmWidth, INT bpp )
59 return 2 * ((bmWidth+15) >> 4);
62 bmWidth *= 3; /* fall through */
64 return bmWidth + (bmWidth & 1);
74 return 2 * ((bmWidth+3) >> 2);
77 WARN("Unknown depth %d, please report.\n", bpp );
83 /******************************************************************************
84 * CreateBitmap [GDI32.@]
86 * Creates a bitmap with the specified info.
89 * width [I] bitmap width
90 * height [I] bitmap height
91 * planes [I] Number of color planes
92 * bpp [I] Number of bits to identify a color
93 * bits [I] Pointer to array containing color data
96 * Success: Handle to bitmap
99 HBITMAP WINAPI CreateBitmap( INT width, INT height, UINT planes,
100 UINT bpp, LPCVOID bits )
106 bm.bmHeight = height;
107 bm.bmWidthBytes = BITMAP_GetWidthBytes( width, bpp );
108 bm.bmPlanes = planes;
109 bm.bmBitsPixel = bpp;
110 bm.bmBits = (LPVOID)bits;
112 return CreateBitmapIndirect( &bm );
115 /******************************************************************************
116 * CreateCompatibleBitmap [GDI32.@]
118 * Creates a bitmap compatible with the DC.
121 * hdc [I] Handle to device context
122 * width [I] Width of bitmap
123 * height [I] Height of bitmap
126 * Success: Handle to bitmap
129 HBITMAP WINAPI CreateCompatibleBitmap( HDC hdc, INT width, INT height)
133 TRACE("(%p,%d,%d) =\n", hdc, width, height);
135 if (GetObjectType( hdc ) != OBJ_MEMDC)
137 hbmpRet = CreateBitmap(width, height,
138 GetDeviceCaps(hdc, PLANES),
139 GetDeviceCaps(hdc, BITSPIXEL),
145 HBITMAP bitmap = GetCurrentObject( hdc, OBJ_BITMAP );
146 INT size = GetObjectW( bitmap, sizeof(dib), &dib );
150 if (size == sizeof(BITMAP))
152 /* A device-dependent bitmap is selected in the DC */
153 hbmpRet = CreateBitmap(width, height,
155 dib.dsBm.bmBitsPixel,
160 /* A DIB section is selected in the DC */
164 /* Allocate memory for a BITMAPINFOHEADER structure and a
165 color table. The maximum number of colors in a color table
166 is 256 which corresponds to a bitmap with depth 8.
167 Bitmaps with higher depths don't have color tables. */
168 bi = HeapAlloc(GetProcessHeap(), 0, sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD));
172 bi->bmiHeader.biSize = sizeof(bi->bmiHeader);
173 bi->bmiHeader.biWidth = width;
174 bi->bmiHeader.biHeight = height;
175 bi->bmiHeader.biPlanes = dib.dsBmih.biPlanes;
176 bi->bmiHeader.biBitCount = dib.dsBmih.biBitCount;
177 bi->bmiHeader.biCompression = dib.dsBmih.biCompression;
178 bi->bmiHeader.biSizeImage = 0;
179 bi->bmiHeader.biXPelsPerMeter = dib.dsBmih.biXPelsPerMeter;
180 bi->bmiHeader.biYPelsPerMeter = dib.dsBmih.biYPelsPerMeter;
181 bi->bmiHeader.biClrUsed = dib.dsBmih.biClrUsed;
182 bi->bmiHeader.biClrImportant = dib.dsBmih.biClrImportant;
184 if (bi->bmiHeader.biCompression == BI_BITFIELDS)
186 /* Copy the color masks */
187 CopyMemory(bi->bmiColors, dib.dsBitfields, 3 * sizeof(DWORD));
189 else if (bi->bmiHeader.biBitCount <= 8)
191 /* Copy the color table */
192 GetDIBColorTable(hdc, 0, 256, bi->bmiColors);
195 hbmpRet = CreateDIBSection(hdc, bi, DIB_RGB_COLORS, &bits, NULL, 0);
196 HeapFree(GetProcessHeap(), 0, bi);
201 TRACE("\t\t%p\n", hbmpRet);
206 /******************************************************************************
207 * CreateBitmapIndirect [GDI32.@]
209 * Creates a bitmap with the specified info.
212 * bmp [I] Pointer to the bitmap info describing the bitmap
215 * Success: Handle to bitmap
216 * Failure: NULL. Use GetLastError() to determine the cause.
219 * If a width or height of 0 are given, a 1x1 monochrome bitmap is returned.
221 HBITMAP WINAPI CreateBitmapIndirect( const BITMAP *bmp )
227 if (!bmp || bmp->bmType)
229 SetLastError( ERROR_INVALID_PARAMETER );
233 if (bmp->bmWidth > 0x7ffffff || bmp->bmHeight > 0x7ffffff)
235 SetLastError( ERROR_INVALID_PARAMETER );
241 if (!bm.bmWidth || !bm.bmHeight)
243 return GetStockObject( DEFAULT_BITMAP );
248 bm.bmHeight = -bm.bmHeight;
250 bm.bmWidth = -bm.bmWidth;
253 if (bm.bmPlanes != 1)
255 FIXME("planes = %d\n", bm.bmPlanes);
256 SetLastError( ERROR_INVALID_PARAMETER );
260 /* Windows only uses 1, 4, 8, 16, 24 and 32 bpp */
261 if(bm.bmBitsPixel == 1) bm.bmBitsPixel = 1;
262 else if(bm.bmBitsPixel <= 4) bm.bmBitsPixel = 4;
263 else if(bm.bmBitsPixel <= 8) bm.bmBitsPixel = 8;
264 else if(bm.bmBitsPixel <= 16) bm.bmBitsPixel = 16;
265 else if(bm.bmBitsPixel <= 24) bm.bmBitsPixel = 24;
266 else if(bm.bmBitsPixel <= 32) bm.bmBitsPixel = 32;
268 WARN("Invalid bmBitsPixel %d, returning ERROR_INVALID_PARAMETER\n", bm.bmBitsPixel);
269 SetLastError(ERROR_INVALID_PARAMETER);
273 /* Windows ignores the provided bm.bmWidthBytes */
274 bm.bmWidthBytes = BITMAP_GetWidthBytes( bm.bmWidth, bm.bmBitsPixel );
275 /* XP doesn't allow to create bitmaps larger than 128 Mb */
276 if (bm.bmHeight > 128 * 1024 * 1024 / bm.bmWidthBytes)
278 SetLastError( ERROR_NOT_ENOUGH_MEMORY );
282 /* Create the BITMAPOBJ */
283 if (!(bmpobj = HeapAlloc( GetProcessHeap(), 0, sizeof(*bmpobj) )))
285 SetLastError( ERROR_NOT_ENOUGH_MEMORY );
292 bmpobj->bitmap.bmBits = NULL;
293 bmpobj->funcs = NULL;
295 bmpobj->color_table = NULL;
296 bmpobj->nb_colors = 0;
298 if (!(hbitmap = alloc_gdi_handle( &bmpobj->header, OBJ_BITMAP, &bitmap_funcs )))
300 HeapFree( GetProcessHeap(), 0, bmpobj );
305 SetBitmapBits( hbitmap, bm.bmHeight * bm.bmWidthBytes, bm.bmBits );
307 TRACE("%dx%d, %d colors returning %p\n", bm.bmWidth, bm.bmHeight,
308 1 << (bm.bmPlanes * bm.bmBitsPixel), hbitmap);
314 /***********************************************************************
315 * GetBitmapBits [GDI32.@]
317 * Copies bitmap bits of bitmap to buffer.
320 * Success: Number of bytes copied
323 LONG WINAPI GetBitmapBits(
324 HBITMAP hbitmap, /* [in] Handle to bitmap */
325 LONG count, /* [in] Number of bytes to copy */
326 LPVOID bits) /* [out] Pointer to buffer to receive bits */
328 BITMAPOBJ *bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
333 if (bmp->dib) /* simply copy the bits from the DIB */
335 DIBSECTION *dib = bmp->dib;
336 const char *src = dib->dsBm.bmBits;
337 INT width_bytes = BITMAP_GetWidthBytes(dib->dsBm.bmWidth, dib->dsBm.bmBitsPixel);
338 LONG max = width_bytes * bmp->bitmap.bmHeight;
346 if (count > max) count = max;
349 /* GetBitmapBits returns not 32-bit aligned data */
351 if (bmp->dib->dsBmih.biHeight >= 0) /* not top-down, need to flip contents vertically */
353 src += dib->dsBm.bmWidthBytes * dib->dsBm.bmHeight;
356 src -= dib->dsBm.bmWidthBytes;
357 memcpy( bits, src, min( count, width_bytes ) );
358 bits = (char *)bits + width_bytes;
359 count -= width_bytes;
366 memcpy( bits, src, min( count, width_bytes ) );
367 src += dib->dsBm.bmWidthBytes;
368 bits = (char *)bits + width_bytes;
369 count -= width_bytes;
375 /* If the bits vector is null, the function should return the read size */
378 ret = bmp->bitmap.bmWidthBytes * bmp->bitmap.bmHeight;
383 WARN("(%d): Negative number of bytes passed???\n", count );
387 /* Only get entire lines */
388 height = count / bmp->bitmap.bmWidthBytes;
389 if (height > bmp->bitmap.bmHeight) height = bmp->bitmap.bmHeight;
390 count = height * bmp->bitmap.bmWidthBytes;
393 WARN("Less than one entire line requested\n");
399 TRACE("(%p, %d, %p) %dx%d %d colors fetched height: %d\n",
400 hbitmap, count, bits, bmp->bitmap.bmWidth, bmp->bitmap.bmHeight,
401 1 << bmp->bitmap.bmBitsPixel, height );
403 if(bmp->funcs && bmp->funcs->pGetBitmapBits)
405 TRACE("Calling device specific BitmapBits\n");
406 ret = bmp->funcs->pGetBitmapBits(hbitmap, bits, count);
409 if(!bmp->bitmap.bmBits) {
410 TRACE("Bitmap is empty\n");
411 memset(bits, 0, count);
414 memcpy(bits, bmp->bitmap.bmBits, count);
420 GDI_ReleaseObj( hbitmap );
425 /******************************************************************************
426 * SetBitmapBits [GDI32.@]
428 * Sets bits of color data for a bitmap.
431 * Success: Number of bytes used in setting the bitmap bits
434 LONG WINAPI SetBitmapBits(
435 HBITMAP hbitmap, /* [in] Handle to bitmap */
436 LONG count, /* [in] Number of bytes in bitmap array */
437 LPCVOID bits) /* [in] Address of array with bitmap bits */
439 BITMAPOBJ *bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
442 if ((!bmp) || (!bits))
446 WARN("(%d): Negative number of bytes passed???\n", count );
450 if (bmp->dib) /* simply copy the bits into the DIB */
452 DIBSECTION *dib = bmp->dib;
453 char *dest = dib->dsBm.bmBits;
454 LONG max = dib->dsBm.bmWidthBytes * dib->dsBm.bmHeight;
455 if (count > max) count = max;
458 if (bmp->dib->dsBmih.biHeight >= 0) /* not top-down, need to flip contents vertically */
460 dest += dib->dsBm.bmWidthBytes * dib->dsBm.bmHeight;
463 dest -= dib->dsBm.bmWidthBytes;
464 memcpy( dest, bits, min( count, dib->dsBm.bmWidthBytes ) );
465 bits = (const char *)bits + dib->dsBm.bmWidthBytes;
466 count -= dib->dsBm.bmWidthBytes;
469 else memcpy( dest, bits, count );
471 GDI_ReleaseObj( hbitmap );
475 /* Only get entire lines */
476 height = count / bmp->bitmap.bmWidthBytes;
477 if (height > bmp->bitmap.bmHeight) height = bmp->bitmap.bmHeight;
478 count = height * bmp->bitmap.bmWidthBytes;
480 TRACE("(%p, %d, %p) %dx%d %d colors fetched height: %d\n",
481 hbitmap, count, bits, bmp->bitmap.bmWidth, bmp->bitmap.bmHeight,
482 1 << bmp->bitmap.bmBitsPixel, height );
484 if(bmp->funcs && bmp->funcs->pSetBitmapBits) {
486 TRACE("Calling device specific BitmapBits\n");
487 ret = bmp->funcs->pSetBitmapBits(hbitmap, bits, count);
490 if(!bmp->bitmap.bmBits) /* Alloc enough for entire bitmap */
491 bmp->bitmap.bmBits = HeapAlloc( GetProcessHeap(), 0, count );
492 if(!bmp->bitmap.bmBits) {
493 WARN("Unable to allocate bit buffer\n");
496 memcpy(bmp->bitmap.bmBits, bits, count);
501 GDI_ReleaseObj( hbitmap );
505 /**********************************************************************
509 HBITMAP BITMAP_CopyBitmap(HBITMAP hbitmap)
514 if (!GetObjectW( hbitmap, sizeof(bm), &bm )) return 0;
515 res = CreateBitmapIndirect(&bm);
518 char *buf = HeapAlloc( GetProcessHeap(), 0, bm.bmWidthBytes *
520 GetBitmapBits (hbitmap, bm.bmWidthBytes * bm.bmHeight, buf);
521 SetBitmapBits (res, bm.bmWidthBytes * bm.bmHeight, buf);
522 HeapFree( GetProcessHeap(), 0, buf );
528 /***********************************************************************
531 * Set the type of DC that owns the bitmap. This is used when the
532 * bitmap is selected into a device to initialize the bitmap function
535 BOOL BITMAP_SetOwnerDC( HBITMAP hbitmap, DC *dc )
540 /* never set the owner of the stock bitmap since it can be selected in multiple DCs */
541 if (hbitmap == GetStockObject(DEFAULT_BITMAP)) return TRUE;
543 if (!(bitmap = GDI_GetObjPtr( hbitmap, OBJ_BITMAP ))) return FALSE;
546 if (!bitmap->funcs) /* not owned by a DC yet */
548 if (dc->funcs->pCreateBitmap) ret = dc->funcs->pCreateBitmap( dc->physDev, hbitmap,
549 bitmap->bitmap.bmBits );
550 if (ret) bitmap->funcs = dc->funcs;
552 else if (bitmap->funcs != dc->funcs)
554 FIXME( "Trying to select bitmap %p in different DC type\n", hbitmap );
557 GDI_ReleaseObj( hbitmap );
562 /***********************************************************************
563 * BITMAP_SelectObject
565 static HGDIOBJ BITMAP_SelectObject( HGDIOBJ handle, HDC hdc )
571 if (!(dc = get_dc_ptr( hdc ))) return 0;
573 if (GetObjectType( hdc ) != OBJ_MEMDC)
579 if (handle == dc->hBitmap) goto done; /* nothing to do */
581 if (!(bitmap = GDI_GetObjPtr( handle, OBJ_BITMAP )))
587 if (bitmap->header.selcount && (handle != GetStockObject(DEFAULT_BITMAP)))
589 WARN( "Bitmap already selected in another DC\n" );
590 GDI_ReleaseObj( handle );
595 if (!bitmap->funcs && !BITMAP_SetOwnerDC( handle, dc ))
597 GDI_ReleaseObj( handle );
602 if (dc->funcs->pSelectBitmap && !dc->funcs->pSelectBitmap( dc->physDev, handle ))
604 GDI_ReleaseObj( handle );
609 dc->hBitmap = handle;
610 GDI_inc_ref_count( handle );
612 SetRectRgn( dc->hVisRgn, 0, 0, bitmap->bitmap.bmWidth, bitmap->bitmap.bmHeight);
613 GDI_ReleaseObj( handle );
615 GDI_dec_ref_count( ret );
619 release_dc_ptr( dc );
624 /***********************************************************************
625 * BITMAP_DeleteObject
627 static BOOL BITMAP_DeleteObject( HGDIOBJ handle )
629 const DC_FUNCTIONS *funcs;
630 BITMAPOBJ *bmp = GDI_GetObjPtr( handle, OBJ_BITMAP );
632 if (!bmp) return FALSE;
634 GDI_ReleaseObj( handle );
636 if (funcs && funcs->pDeleteBitmap) funcs->pDeleteBitmap( handle );
638 if (!(bmp = free_gdi_handle( handle ))) return FALSE;
640 HeapFree( GetProcessHeap(), 0, bmp->bitmap.bmBits );
644 DIBSECTION *dib = bmp->dib;
646 if (dib->dsBm.bmBits)
650 SYSTEM_INFO SystemInfo;
651 GetSystemInfo( &SystemInfo );
652 UnmapViewOfFile( (char *)dib->dsBm.bmBits -
653 (dib->dsOffset % SystemInfo.dwAllocationGranularity) );
655 else if (!dib->dsOffset)
656 VirtualFree(dib->dsBm.bmBits, 0L, MEM_RELEASE );
658 HeapFree(GetProcessHeap(), 0, dib);
659 HeapFree(GetProcessHeap(), 0, bmp->color_table);
661 return HeapFree( GetProcessHeap(), 0, bmp );
665 /***********************************************************************
668 static INT BITMAP_GetObject( HGDIOBJ handle, INT count, LPVOID buffer )
671 BITMAPOBJ *bmp = GDI_GetObjPtr( handle, OBJ_BITMAP );
675 if (!buffer) ret = sizeof(BITMAP);
676 else if (count < sizeof(BITMAP)) ret = 0;
679 if (count >= sizeof(DIBSECTION))
681 memcpy( buffer, bmp->dib, sizeof(DIBSECTION) );
682 ret = sizeof(DIBSECTION);
684 else /* if (count >= sizeof(BITMAP)) */
686 DIBSECTION *dib = bmp->dib;
687 memcpy( buffer, &dib->dsBm, sizeof(BITMAP) );
688 ret = sizeof(BITMAP);
693 memcpy( buffer, &bmp->bitmap, sizeof(BITMAP) );
694 ((BITMAP *) buffer)->bmBits = NULL;
695 ret = sizeof(BITMAP);
697 GDI_ReleaseObj( handle );
702 /******************************************************************************
703 * CreateDiscardableBitmap [GDI32.@]
705 * Creates a discardable bitmap.
708 * Success: Handle to bitmap
711 HBITMAP WINAPI CreateDiscardableBitmap(
712 HDC hdc, /* [in] Handle to device context */
713 INT width, /* [in] Bitmap width */
714 INT height) /* [in] Bitmap height */
716 return CreateCompatibleBitmap( hdc, width, height );
720 /******************************************************************************
721 * GetBitmapDimensionEx [GDI32.@]
723 * Retrieves dimensions of a bitmap.
729 BOOL WINAPI GetBitmapDimensionEx(
730 HBITMAP hbitmap, /* [in] Handle to bitmap */
731 LPSIZE size) /* [out] Address of struct receiving dimensions */
733 BITMAPOBJ * bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
734 if (!bmp) return FALSE;
736 GDI_ReleaseObj( hbitmap );
741 /******************************************************************************
742 * SetBitmapDimensionEx [GDI32.@]
744 * Assigns dimensions to a bitmap.
745 * MSDN says that this function will fail if hbitmap is a handle created by
746 * CreateDIBSection, but that's not true on Windows 2000.
752 BOOL WINAPI SetBitmapDimensionEx(
753 HBITMAP hbitmap, /* [in] Handle to bitmap */
754 INT x, /* [in] Bitmap width */
755 INT y, /* [in] Bitmap height */
756 LPSIZE prevSize) /* [out] Address of structure for orig dims */
758 BITMAPOBJ * bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
759 if (!bmp) return FALSE;
760 if (prevSize) *prevSize = bmp->size;
763 GDI_ReleaseObj( hbitmap );