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 "wine/winbase16.h"
30 #include "gdi_private.h"
31 #include "wine/debug.h"
33 WINE_DEFAULT_DEBUG_CHANNEL(bitmap);
36 static HGDIOBJ BITMAP_SelectObject( HGDIOBJ handle, HDC hdc );
37 static INT BITMAP_GetObject( HGDIOBJ handle, INT count, LPVOID buffer );
38 static BOOL BITMAP_DeleteObject( HGDIOBJ handle );
40 static const struct gdi_obj_funcs bitmap_funcs =
42 BITMAP_SelectObject, /* pSelectObject */
43 BITMAP_GetObject, /* pGetObjectA */
44 BITMAP_GetObject, /* pGetObjectW */
45 NULL, /* pUnrealizeObject */
46 BITMAP_DeleteObject /* pDeleteObject */
49 /***********************************************************************
50 * BITMAP_GetWidthBytes
52 * Return number of bytes taken by a scanline of 16-bit aligned Windows DDB
55 INT BITMAP_GetWidthBytes( INT bmWidth, INT bpp )
60 return 2 * ((bmWidth+15) >> 4);
63 bmWidth *= 3; /* fall through */
65 return bmWidth + (bmWidth & 1);
75 return 2 * ((bmWidth+3) >> 2);
78 WARN("Unknown depth %d, please report.\n", bpp );
84 /******************************************************************************
85 * CreateBitmap [GDI32.@]
87 * Creates a bitmap with the specified info.
90 * width [I] bitmap width
91 * height [I] bitmap height
92 * planes [I] Number of color planes
93 * bpp [I] Number of bits to identify a color
94 * bits [I] Pointer to array containing color data
97 * Success: Handle to bitmap
100 HBITMAP WINAPI CreateBitmap( INT width, INT height, UINT planes,
101 UINT bpp, LPCVOID bits )
107 bm.bmHeight = height;
108 bm.bmWidthBytes = BITMAP_GetWidthBytes( width, bpp );
109 bm.bmPlanes = planes;
110 bm.bmBitsPixel = bpp;
111 bm.bmBits = (LPVOID)bits;
113 return CreateBitmapIndirect( &bm );
116 /******************************************************************************
117 * CreateCompatibleBitmap [GDI32.@]
119 * Creates a bitmap compatible with the DC.
122 * hdc [I] Handle to device context
123 * width [I] Width of bitmap
124 * height [I] Height of bitmap
127 * Success: Handle to bitmap
130 HBITMAP WINAPI CreateCompatibleBitmap( HDC hdc, INT width, INT height)
134 TRACE("(%p,%d,%d) =\n", hdc, width, height);
136 if (GetObjectType( hdc ) != OBJ_MEMDC)
138 hbmpRet = CreateBitmap(width, height,
139 GetDeviceCaps(hdc, PLANES),
140 GetDeviceCaps(hdc, BITSPIXEL),
146 HBITMAP bitmap = GetCurrentObject( hdc, OBJ_BITMAP );
147 INT size = GetObjectW( bitmap, sizeof(dib), &dib );
151 if (size == sizeof(BITMAP))
153 /* A device-dependent bitmap is selected in the DC */
154 hbmpRet = CreateBitmap(width, height,
156 dib.dsBm.bmBitsPixel,
161 /* A DIB section is selected in the DC */
165 /* Allocate memory for a BITMAPINFOHEADER structure and a
166 color table. The maximum number of colors in a color table
167 is 256 which corresponds to a bitmap with depth 8.
168 Bitmaps with higher depths don't have color tables. */
169 bi = HeapAlloc(GetProcessHeap(), 0, sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD));
173 bi->bmiHeader.biSize = sizeof(bi->bmiHeader);
174 bi->bmiHeader.biWidth = width;
175 bi->bmiHeader.biHeight = height;
176 bi->bmiHeader.biPlanes = dib.dsBmih.biPlanes;
177 bi->bmiHeader.biBitCount = dib.dsBmih.biBitCount;
178 bi->bmiHeader.biCompression = dib.dsBmih.biCompression;
179 bi->bmiHeader.biSizeImage = 0;
180 bi->bmiHeader.biXPelsPerMeter = dib.dsBmih.biXPelsPerMeter;
181 bi->bmiHeader.biYPelsPerMeter = dib.dsBmih.biYPelsPerMeter;
182 bi->bmiHeader.biClrUsed = dib.dsBmih.biClrUsed;
183 bi->bmiHeader.biClrImportant = dib.dsBmih.biClrImportant;
185 if (bi->bmiHeader.biCompression == BI_BITFIELDS)
187 /* Copy the color masks */
188 CopyMemory(bi->bmiColors, dib.dsBitfields, 3 * sizeof(DWORD));
190 else if (bi->bmiHeader.biBitCount <= 8)
192 /* Copy the color table */
193 GetDIBColorTable(hdc, 0, 256, bi->bmiColors);
196 hbmpRet = CreateDIBSection(hdc, bi, DIB_RGB_COLORS, &bits, NULL, 0);
197 HeapFree(GetProcessHeap(), 0, bi);
202 TRACE("\t\t%p\n", hbmpRet);
207 /******************************************************************************
208 * CreateBitmapIndirect [GDI32.@]
210 * Creates a bitmap with the specified info.
213 * bmp [I] Pointer to the bitmap info describing the bitmap
216 * Success: Handle to bitmap
217 * Failure: NULL. Use GetLastError() to determine the cause.
220 * If a width or height of 0 are given, a 1x1 monochrome bitmap is returned.
222 HBITMAP WINAPI CreateBitmapIndirect( const BITMAP *bmp )
228 if (!bmp || bmp->bmType)
230 SetLastError( ERROR_INVALID_PARAMETER );
234 if (bmp->bmWidth > 0x7ffffff || bmp->bmHeight > 0x7ffffff)
236 SetLastError( ERROR_INVALID_PARAMETER );
242 if (!bm.bmWidth || !bm.bmHeight)
244 return GetStockObject( DEFAULT_BITMAP );
249 bm.bmHeight = -bm.bmHeight;
251 bm.bmWidth = -bm.bmWidth;
254 if (bm.bmPlanes != 1)
256 FIXME("planes = %d\n", bm.bmPlanes);
257 SetLastError( ERROR_INVALID_PARAMETER );
261 /* Windows only uses 1, 4, 8, 16, 24 and 32 bpp */
262 if(bm.bmBitsPixel == 1) bm.bmBitsPixel = 1;
263 else if(bm.bmBitsPixel <= 4) bm.bmBitsPixel = 4;
264 else if(bm.bmBitsPixel <= 8) bm.bmBitsPixel = 8;
265 else if(bm.bmBitsPixel <= 16) bm.bmBitsPixel = 16;
266 else if(bm.bmBitsPixel <= 24) bm.bmBitsPixel = 24;
267 else if(bm.bmBitsPixel <= 32) bm.bmBitsPixel = 32;
269 WARN("Invalid bmBitsPixel %d, returning ERROR_INVALID_PARAMETER\n", bm.bmBitsPixel);
270 SetLastError(ERROR_INVALID_PARAMETER);
274 /* Windows ignores the provided bm.bmWidthBytes */
275 bm.bmWidthBytes = BITMAP_GetWidthBytes( bm.bmWidth, bm.bmBitsPixel );
276 /* XP doesn't allow to create bitmaps larger than 128 Mb */
277 if (bm.bmHeight > 128 * 1024 * 1024 / bm.bmWidthBytes)
279 SetLastError( ERROR_NOT_ENOUGH_MEMORY );
283 /* Create the BITMAPOBJ */
284 if (!(bmpobj = HeapAlloc( GetProcessHeap(), 0, sizeof(*bmpobj) )))
286 SetLastError( ERROR_NOT_ENOUGH_MEMORY );
293 bmpobj->bitmap.bmBits = NULL;
294 bmpobj->funcs = NULL;
296 bmpobj->segptr_bits = 0;
297 bmpobj->color_table = NULL;
298 bmpobj->nb_colors = 0;
300 if (!(hbitmap = alloc_gdi_handle( &bmpobj->header, OBJ_BITMAP, &bitmap_funcs )))
302 HeapFree( GetProcessHeap(), 0, bmpobj );
307 SetBitmapBits( hbitmap, bm.bmHeight * bm.bmWidthBytes, bm.bmBits );
309 TRACE("%dx%d, %d colors returning %p\n", bm.bmWidth, bm.bmHeight,
310 1 << (bm.bmPlanes * bm.bmBitsPixel), hbitmap);
316 /***********************************************************************
317 * GetBitmapBits [GDI32.@]
319 * Copies bitmap bits of bitmap to buffer.
322 * Success: Number of bytes copied
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 */
330 BITMAPOBJ *bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
335 if (bmp->dib) /* simply copy the bits from the DIB */
337 DIBSECTION *dib = bmp->dib;
338 const char *src = dib->dsBm.bmBits;
339 INT width_bytes = BITMAP_GetWidthBytes(dib->dsBm.bmWidth, dib->dsBm.bmBitsPixel);
340 LONG max = width_bytes * bmp->bitmap.bmHeight;
348 if (count > max) count = max;
351 /* GetBitmapBits returns not 32-bit aligned data */
353 if (bmp->dib->dsBmih.biHeight >= 0) /* not top-down, need to flip contents vertically */
355 src += dib->dsBm.bmWidthBytes * dib->dsBm.bmHeight;
358 src -= dib->dsBm.bmWidthBytes;
359 memcpy( bits, src, min( count, width_bytes ) );
360 bits = (char *)bits + width_bytes;
361 count -= width_bytes;
368 memcpy( bits, src, min( count, width_bytes ) );
369 src += dib->dsBm.bmWidthBytes;
370 bits = (char *)bits + width_bytes;
371 count -= width_bytes;
377 /* If the bits vector is null, the function should return the read size */
380 ret = bmp->bitmap.bmWidthBytes * bmp->bitmap.bmHeight;
385 WARN("(%d): Negative number of bytes passed???\n", count );
389 /* Only get entire lines */
390 height = count / bmp->bitmap.bmWidthBytes;
391 if (height > bmp->bitmap.bmHeight) height = bmp->bitmap.bmHeight;
392 count = height * bmp->bitmap.bmWidthBytes;
395 WARN("Less than one entire line requested\n");
401 TRACE("(%p, %d, %p) %dx%d %d colors fetched height: %d\n",
402 hbitmap, count, bits, bmp->bitmap.bmWidth, bmp->bitmap.bmHeight,
403 1 << bmp->bitmap.bmBitsPixel, height );
405 if(bmp->funcs && bmp->funcs->pGetBitmapBits)
407 TRACE("Calling device specific BitmapBits\n");
408 ret = bmp->funcs->pGetBitmapBits(hbitmap, bits, count);
411 if(!bmp->bitmap.bmBits) {
412 TRACE("Bitmap is empty\n");
413 memset(bits, 0, count);
416 memcpy(bits, bmp->bitmap.bmBits, count);
422 GDI_ReleaseObj( hbitmap );
427 /******************************************************************************
428 * SetBitmapBits [GDI32.@]
430 * Sets bits of color data for a bitmap.
433 * Success: Number of bytes used in setting the bitmap bits
436 LONG WINAPI SetBitmapBits(
437 HBITMAP hbitmap, /* [in] Handle to bitmap */
438 LONG count, /* [in] Number of bytes in bitmap array */
439 LPCVOID bits) /* [in] Address of array with bitmap bits */
441 BITMAPOBJ *bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
444 if ((!bmp) || (!bits))
448 WARN("(%d): Negative number of bytes passed???\n", count );
452 if (bmp->dib) /* simply copy the bits into the DIB */
454 DIBSECTION *dib = bmp->dib;
455 char *dest = dib->dsBm.bmBits;
456 LONG max = dib->dsBm.bmWidthBytes * dib->dsBm.bmHeight;
457 if (count > max) count = max;
460 if (bmp->dib->dsBmih.biHeight >= 0) /* not top-down, need to flip contents vertically */
462 dest += dib->dsBm.bmWidthBytes * dib->dsBm.bmHeight;
465 dest -= dib->dsBm.bmWidthBytes;
466 memcpy( dest, bits, min( count, dib->dsBm.bmWidthBytes ) );
467 bits = (const char *)bits + dib->dsBm.bmWidthBytes;
468 count -= dib->dsBm.bmWidthBytes;
471 else memcpy( dest, bits, count );
473 GDI_ReleaseObj( hbitmap );
477 /* Only get entire lines */
478 height = count / bmp->bitmap.bmWidthBytes;
479 if (height > bmp->bitmap.bmHeight) height = bmp->bitmap.bmHeight;
480 count = height * bmp->bitmap.bmWidthBytes;
482 TRACE("(%p, %d, %p) %dx%d %d colors fetched height: %d\n",
483 hbitmap, count, bits, bmp->bitmap.bmWidth, bmp->bitmap.bmHeight,
484 1 << bmp->bitmap.bmBitsPixel, height );
486 if(bmp->funcs && bmp->funcs->pSetBitmapBits) {
488 TRACE("Calling device specific BitmapBits\n");
489 ret = bmp->funcs->pSetBitmapBits(hbitmap, bits, count);
492 if(!bmp->bitmap.bmBits) /* Alloc enough for entire bitmap */
493 bmp->bitmap.bmBits = HeapAlloc( GetProcessHeap(), 0, count );
494 if(!bmp->bitmap.bmBits) {
495 WARN("Unable to allocate bit buffer\n");
498 memcpy(bmp->bitmap.bmBits, bits, count);
503 GDI_ReleaseObj( hbitmap );
507 /**********************************************************************
511 HBITMAP BITMAP_CopyBitmap(HBITMAP hbitmap)
516 if (!GetObjectW( hbitmap, sizeof(bm), &bm )) return 0;
517 res = CreateBitmapIndirect(&bm);
520 char *buf = HeapAlloc( GetProcessHeap(), 0, bm.bmWidthBytes *
522 GetBitmapBits (hbitmap, bm.bmWidthBytes * bm.bmHeight, buf);
523 SetBitmapBits (res, bm.bmWidthBytes * bm.bmHeight, buf);
524 HeapFree( GetProcessHeap(), 0, buf );
530 /***********************************************************************
533 * Set the type of DC that owns the bitmap. This is used when the
534 * bitmap is selected into a device to initialize the bitmap function
537 BOOL BITMAP_SetOwnerDC( HBITMAP hbitmap, DC *dc )
542 /* never set the owner of the stock bitmap since it can be selected in multiple DCs */
543 if (hbitmap == GetStockObject(DEFAULT_BITMAP)) return TRUE;
545 if (!(bitmap = GDI_GetObjPtr( hbitmap, OBJ_BITMAP ))) return FALSE;
548 if (!bitmap->funcs) /* not owned by a DC yet */
550 if (dc->funcs->pCreateBitmap) ret = dc->funcs->pCreateBitmap( dc->physDev, hbitmap,
551 bitmap->bitmap.bmBits );
552 if (ret) bitmap->funcs = dc->funcs;
554 else if (bitmap->funcs != dc->funcs)
556 FIXME( "Trying to select bitmap %p in different DC type\n", hbitmap );
559 GDI_ReleaseObj( hbitmap );
564 /***********************************************************************
565 * BITMAP_SelectObject
567 static HGDIOBJ BITMAP_SelectObject( HGDIOBJ handle, HDC hdc )
573 if (!(dc = get_dc_ptr( hdc ))) return 0;
575 if (GetObjectType( hdc ) != OBJ_MEMDC)
581 if (handle == dc->hBitmap) goto done; /* nothing to do */
583 if (!(bitmap = GDI_GetObjPtr( handle, OBJ_BITMAP )))
589 if (bitmap->header.selcount && (handle != GetStockObject(DEFAULT_BITMAP)))
591 WARN( "Bitmap already selected in another DC\n" );
592 GDI_ReleaseObj( handle );
597 if (!bitmap->funcs && !BITMAP_SetOwnerDC( handle, dc ))
599 GDI_ReleaseObj( handle );
604 if (dc->funcs->pSelectBitmap && !dc->funcs->pSelectBitmap( dc->physDev, handle ))
606 GDI_ReleaseObj( handle );
611 dc->hBitmap = handle;
612 GDI_inc_ref_count( handle );
614 SetRectRgn( dc->hVisRgn, 0, 0, bitmap->bitmap.bmWidth, bitmap->bitmap.bmHeight);
615 GDI_ReleaseObj( handle );
617 GDI_dec_ref_count( ret );
621 release_dc_ptr( dc );
626 /***********************************************************************
627 * BITMAP_DeleteObject
629 static BOOL BITMAP_DeleteObject( HGDIOBJ handle )
631 const DC_FUNCTIONS *funcs;
632 BITMAPOBJ *bmp = GDI_GetObjPtr( handle, OBJ_BITMAP );
634 if (!bmp) return FALSE;
636 GDI_ReleaseObj( handle );
638 if (funcs && funcs->pDeleteBitmap) funcs->pDeleteBitmap( handle );
640 if (!(bmp = free_gdi_handle( handle ))) return FALSE;
642 HeapFree( GetProcessHeap(), 0, bmp->bitmap.bmBits );
646 DIBSECTION *dib = bmp->dib;
648 if (dib->dsBm.bmBits)
652 SYSTEM_INFO SystemInfo;
653 GetSystemInfo( &SystemInfo );
654 UnmapViewOfFile( (char *)dib->dsBm.bmBits -
655 (dib->dsOffset % SystemInfo.dwAllocationGranularity) );
657 else if (!dib->dsOffset)
658 VirtualFree(dib->dsBm.bmBits, 0L, MEM_RELEASE );
660 HeapFree(GetProcessHeap(), 0, dib);
662 if (bmp->segptr_bits)
663 { /* free its selector array */
664 WORD sel = SELECTOROF(bmp->segptr_bits);
665 WORD count = (GetSelectorLimit16(sel) / 0x10000) + 1;
668 for (i = 0; i < count; i++) FreeSelector16(sel + (i << __AHSHIFT));
670 HeapFree(GetProcessHeap(), 0, bmp->color_table);
672 return HeapFree( GetProcessHeap(), 0, bmp );
676 /***********************************************************************
679 static INT BITMAP_GetObject( HGDIOBJ handle, INT count, LPVOID buffer )
682 BITMAPOBJ *bmp = GDI_GetObjPtr( handle, OBJ_BITMAP );
686 if (!buffer) ret = sizeof(BITMAP);
687 else if (count < sizeof(BITMAP)) ret = 0;
690 if (count >= sizeof(DIBSECTION))
692 memcpy( buffer, bmp->dib, sizeof(DIBSECTION) );
693 ret = sizeof(DIBSECTION);
695 else /* if (count >= sizeof(BITMAP)) */
697 DIBSECTION *dib = bmp->dib;
698 memcpy( buffer, &dib->dsBm, sizeof(BITMAP) );
699 ret = sizeof(BITMAP);
704 memcpy( buffer, &bmp->bitmap, sizeof(BITMAP) );
705 ((BITMAP *) buffer)->bmBits = NULL;
706 ret = sizeof(BITMAP);
708 GDI_ReleaseObj( handle );
713 /******************************************************************************
714 * CreateDiscardableBitmap [GDI32.@]
716 * Creates a discardable bitmap.
719 * Success: Handle to bitmap
722 HBITMAP WINAPI CreateDiscardableBitmap(
723 HDC hdc, /* [in] Handle to device context */
724 INT width, /* [in] Bitmap width */
725 INT height) /* [in] Bitmap height */
727 return CreateCompatibleBitmap( hdc, width, height );
731 /******************************************************************************
732 * GetBitmapDimensionEx [GDI32.@]
734 * Retrieves dimensions of a bitmap.
740 BOOL WINAPI GetBitmapDimensionEx(
741 HBITMAP hbitmap, /* [in] Handle to bitmap */
742 LPSIZE size) /* [out] Address of struct receiving dimensions */
744 BITMAPOBJ * bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
745 if (!bmp) return FALSE;
747 GDI_ReleaseObj( hbitmap );
752 /******************************************************************************
753 * SetBitmapDimensionEx [GDI32.@]
755 * Assigns dimensions to a bitmap.
756 * MSDN says that this function will fail if hbitmap is a handle created by
757 * CreateDIBSection, but that's not true on Windows 2000.
763 BOOL WINAPI SetBitmapDimensionEx(
764 HBITMAP hbitmap, /* [in] Handle to bitmap */
765 INT x, /* [in] Bitmap width */
766 INT y, /* [in] Bitmap height */
767 LPSIZE prevSize) /* [out] Address of structure for orig dims */
769 BITMAPOBJ * bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
770 if (!bmp) return FALSE;
771 if (prevSize) *prevSize = bmp->size;
774 GDI_ReleaseObj( hbitmap );