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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #include "wine/winbase16.h"
28 #include "selectors.h"
29 #include "wine/debug.h"
30 #include "wine/winuser16.h"
32 WINE_DEFAULT_DEBUG_CHANNEL(bitmap);
35 static HGDIOBJ BITMAP_SelectObject( HGDIOBJ handle, void *obj, HDC hdc );
36 static INT BITMAP_GetObject16( HGDIOBJ handle, void *obj, INT count, LPVOID buffer );
37 static INT BITMAP_GetObject( HGDIOBJ handle, void *obj, INT count, LPVOID buffer );
38 static BOOL BITMAP_DeleteObject( HGDIOBJ handle, void *obj );
40 static const struct gdi_obj_funcs bitmap_funcs =
42 BITMAP_SelectObject, /* pSelectObject */
43 BITMAP_GetObject16, /* pGetObject16 */
44 BITMAP_GetObject, /* pGetObjectA */
45 BITMAP_GetObject, /* pGetObjectW */
46 NULL, /* pUnrealizeObject */
47 BITMAP_DeleteObject /* pDeleteObject */
50 /***********************************************************************
51 * BITMAP_GetWidthBytes
53 * Return number of bytes taken by a scanline of 16-bit aligned Windows DDB
56 static INT BITMAP_GetWidthBytes( INT bmWidth, INT bpp )
61 return 2 * ((bmWidth+15) >> 4);
64 bmWidth *= 3; /* fall through */
66 return bmWidth + (bmWidth & 1);
76 return 2 * ((bmWidth+3) >> 2);
79 WARN("Unknown depth %d, please report.\n", bpp );
85 /******************************************************************************
86 * CreateBitmap [GDI32.@] 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 )
105 planes = (BYTE)planes;
109 /* Check parameters */
110 if (!height || !width)
118 FIXME("planes = %d\n", planes);
121 if (height < 0) height = -height;
122 if (width < 0) width = -width;
124 /* Create the BITMAPOBJ */
125 if (!(bmp = GDI_AllocObject( sizeof(BITMAPOBJ), BITMAP_MAGIC,
126 (HGDIOBJ *)&hbitmap, &bitmap_funcs )))
129 TRACE("%dx%d, %d colors returning %p\n", width, height, 1 << (planes*bpp), hbitmap);
133 bmp->bitmap.bmType = 0;
134 bmp->bitmap.bmWidth = width;
135 bmp->bitmap.bmHeight = height;
136 bmp->bitmap.bmPlanes = planes;
137 bmp->bitmap.bmBitsPixel = bpp;
138 bmp->bitmap.bmWidthBytes = BITMAP_GetWidthBytes( width, bpp );
139 bmp->bitmap.bmBits = NULL;
142 bmp->physBitmap = NULL;
144 bmp->segptr_bits = 0;
146 if (bits) /* Set bitmap bits */
147 SetBitmapBits( hbitmap, height * bmp->bitmap.bmWidthBytes,
149 GDI_ReleaseObj( hbitmap );
154 /******************************************************************************
155 * CreateCompatibleBitmap [GDI32.@] Creates a bitmap compatible with the DC
158 * hdc [I] Handle to device context
159 * width [I] Width of bitmap
160 * height [I] Height of bitmap
163 * Success: Handle to bitmap
166 HBITMAP WINAPI CreateCompatibleBitmap( HDC hdc, INT width, INT height)
171 TRACE("(%p,%d,%d) = \n", hdc, width, height );
172 if (!(dc = DC_GetDCPtr( hdc ))) return 0;
173 if ((width >= 0x10000) || (height >= 0x10000)) {
174 FIXME("got bad width %d or height %d, please look for reason\n",
177 /* MS doc says if width or height is 0, return 1-by-1 pixel, monochrome bitmap */
178 if (!width || !height)
179 hbmpRet = CreateBitmap( 1, 1, 1, 1, NULL );
181 hbmpRet = CreateBitmap( width, height, 1, dc->bitsPerPixel, NULL );
183 if (!BITMAP_SetOwnerDC( hbmpRet, dc ))
185 DeleteObject( hbmpRet );
189 TRACE("\t\t%p\n", hbmpRet);
195 /******************************************************************************
196 * CreateBitmapIndirect [GDI32.@] Creates a bitmap with the specifies info
199 * Success: Handle to bitmap
202 HBITMAP WINAPI CreateBitmapIndirect(
203 const BITMAP * bmp) /* [in] Pointer to the bitmap data */
205 return CreateBitmap( bmp->bmWidth, bmp->bmHeight, bmp->bmPlanes,
206 bmp->bmBitsPixel, bmp->bmBits );
210 /***********************************************************************
211 * GetBitmapBits [GDI32.@] Copies bitmap bits of bitmap to buffer
214 * Success: Number of bytes copied
217 LONG WINAPI GetBitmapBits(
218 HBITMAP hbitmap, /* [in] Handle to bitmap */
219 LONG count, /* [in] Number of bytes to copy */
220 LPVOID bits) /* [out] Pointer to buffer to receive bits */
222 BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
227 /* If the bits vector is null, the function should return the read size */
230 ret = bmp->bitmap.bmWidthBytes * bmp->bitmap.bmHeight;
235 WARN("(%ld): Negative number of bytes passed???\n", count );
239 /* Only get entire lines */
240 height = count / bmp->bitmap.bmWidthBytes;
241 if (height > bmp->bitmap.bmHeight) height = bmp->bitmap.bmHeight;
242 count = height * bmp->bitmap.bmWidthBytes;
245 WARN("Less than one entire line requested\n");
251 TRACE("(%p, %ld, %p) %dx%d %d colors fetched height: %ld\n",
252 hbitmap, count, bits, bmp->bitmap.bmWidth, bmp->bitmap.bmHeight,
253 1 << bmp->bitmap.bmBitsPixel, height );
257 TRACE("Calling device specific BitmapBits\n");
258 if(bmp->funcs->pGetBitmapBits)
259 ret = bmp->funcs->pGetBitmapBits(hbitmap, bits, count);
262 memset( bits, 0, count );
267 if(!bmp->bitmap.bmBits) {
268 WARN("Bitmap is empty\n");
271 memcpy(bits, bmp->bitmap.bmBits, count);
277 GDI_ReleaseObj( hbitmap );
282 /******************************************************************************
283 * SetBitmapBits [GDI32.@] Sets bits of color data for a bitmap
286 * Success: Number of bytes used in setting the bitmap bits
289 LONG WINAPI SetBitmapBits(
290 HBITMAP hbitmap, /* [in] Handle to bitmap */
291 LONG count, /* [in] Number of bytes in bitmap array */
292 LPCVOID bits) /* [in] Address of array with bitmap bits */
294 BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
297 if ((!bmp) || (!bits))
301 WARN("(%ld): Negative number of bytes passed???\n", count );
305 /* Only get entire lines */
306 height = count / bmp->bitmap.bmWidthBytes;
307 if (height > bmp->bitmap.bmHeight) height = bmp->bitmap.bmHeight;
308 count = height * bmp->bitmap.bmWidthBytes;
310 TRACE("(%p, %ld, %p) %dx%d %d colors fetched height: %ld\n",
311 hbitmap, count, bits, bmp->bitmap.bmWidth, bmp->bitmap.bmHeight,
312 1 << bmp->bitmap.bmBitsPixel, height );
316 TRACE("Calling device specific BitmapBits\n");
317 if(bmp->funcs->pSetBitmapBits)
318 ret = bmp->funcs->pSetBitmapBits(hbitmap, bits, count);
323 if(!bmp->bitmap.bmBits) /* Alloc enough for entire bitmap */
324 bmp->bitmap.bmBits = HeapAlloc( GetProcessHeap(), 0, count );
325 if(!bmp->bitmap.bmBits) {
326 WARN("Unable to allocate bit buffer\n");
329 memcpy(bmp->bitmap.bmBits, bits, count);
334 GDI_ReleaseObj( hbitmap );
338 /**********************************************************************
342 HBITMAP BITMAP_CopyBitmap(HBITMAP hbitmap)
344 BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
352 res = CreateBitmapIndirect(&bm);
355 char *buf = HeapAlloc( GetProcessHeap(), 0, bm.bmWidthBytes *
357 GetBitmapBits (hbitmap, bm.bmWidthBytes * bm.bmHeight, buf);
358 SetBitmapBits (res, bm.bmWidthBytes * bm.bmHeight, buf);
359 HeapFree( GetProcessHeap(), 0, buf );
362 GDI_ReleaseObj( hbitmap );
367 /***********************************************************************
370 * Set the type of DC that owns the bitmap. This is used when the
371 * bitmap is selected into a device to initialize the bitmap function
374 BOOL BITMAP_SetOwnerDC( HBITMAP hbitmap, DC *dc )
379 /* never set the owner of the stock bitmap since it can be selected in multiple DCs */
380 if (hbitmap == GetStockObject(DEFAULT_BITMAP)) return TRUE;
382 if (!(bitmap = GDI_GetObjPtr( hbitmap, BITMAP_MAGIC ))) return FALSE;
385 if (!bitmap->funcs) /* not owned by a DC yet */
387 if (dc->funcs->pCreateBitmap) ret = dc->funcs->pCreateBitmap( dc->physDev, hbitmap );
388 if (ret) bitmap->funcs = dc->funcs;
390 else if (bitmap->funcs != dc->funcs)
392 FIXME( "Trying to select bitmap %p in different DC type\n", hbitmap );
395 GDI_ReleaseObj( hbitmap );
400 /***********************************************************************
401 * BITMAP_SelectObject
403 static HGDIOBJ BITMAP_SelectObject( HGDIOBJ handle, void *obj, HDC hdc )
406 BITMAPOBJ *bitmap = obj;
407 DC *dc = DC_GetDCPtr( hdc );
410 if (GetObjectType( hdc ) != OBJ_MEMDC)
412 GDI_ReleaseObj( hdc );
416 if (handle == dc->hBitmap) goto done; /* nothing to do */
418 if (bitmap->header.dwCount && (handle != GetStockObject(DEFAULT_BITMAP)))
420 WARN( "Bitmap already selected in another DC\n" );
421 GDI_ReleaseObj( hdc );
425 if (!bitmap->funcs && !BITMAP_SetOwnerDC( handle, dc ))
427 GDI_ReleaseObj( hdc );
431 if (dc->funcs->pSelectBitmap) handle = dc->funcs->pSelectBitmap( dc->physDev, handle );
435 dc->hBitmap = handle;
436 dc->totalExtent.left = 0;
437 dc->totalExtent.top = 0;
438 dc->totalExtent.right = bitmap->bitmap.bmWidth;
439 dc->totalExtent.bottom = bitmap->bitmap.bmHeight;
440 dc->flags &= ~DC_DIRTY;
441 SetRectRgn( dc->hVisRgn, 0, 0, bitmap->bitmap.bmWidth, bitmap->bitmap.bmHeight);
442 CLIPPING_UpdateGCRegion( dc );
444 if (dc->bitsPerPixel != bitmap->bitmap.bmBitsPixel)
446 /* depth changed, reinitialize the DC */
447 dc->bitsPerPixel = bitmap->bitmap.bmBitsPixel;
454 GDI_ReleaseObj( hdc );
459 /***********************************************************************
460 * BITMAP_DeleteObject
462 static BOOL BITMAP_DeleteObject( HGDIOBJ handle, void *obj )
464 BITMAPOBJ * bmp = obj;
466 if (bmp->funcs && bmp->funcs->pDeleteBitmap)
467 bmp->funcs->pDeleteBitmap( handle );
469 if( bmp->bitmap.bmBits )
470 HeapFree( GetProcessHeap(), 0, bmp->bitmap.bmBits );
474 DIBSECTION *dib = bmp->dib;
476 if (dib->dsBm.bmBits)
480 SYSTEM_INFO SystemInfo;
481 GetSystemInfo( &SystemInfo );
482 UnmapViewOfFile( (char *)dib->dsBm.bmBits -
483 (dib->dsOffset % SystemInfo.dwAllocationGranularity) );
485 else if (!dib->dsOffset)
486 VirtualFree(dib->dsBm.bmBits, 0L, MEM_RELEASE );
488 HeapFree(GetProcessHeap(), 0, dib);
490 if (bmp->segptr_bits)
491 { /* free its selector array */
492 WORD sel = SELECTOROF(bmp->segptr_bits);
493 WORD count = (GetSelectorLimit16(sel) / 0x10000) + 1;
496 for (i = 0; i < count; i++) FreeSelector16(sel + (i << __AHSHIFT));
499 return GDI_FreeObject( handle, obj );
503 /***********************************************************************
506 static INT BITMAP_GetObject16( HGDIOBJ handle, void *obj, INT count, LPVOID buffer )
508 BITMAPOBJ *bmp = obj;
512 if ( count <= sizeof(BITMAP16) )
514 BITMAP *bmp32 = &bmp->dib->dsBm;
516 bmp16.bmType = bmp32->bmType;
517 bmp16.bmWidth = bmp32->bmWidth;
518 bmp16.bmHeight = bmp32->bmHeight;
519 bmp16.bmWidthBytes = bmp32->bmWidthBytes;
520 bmp16.bmPlanes = bmp32->bmPlanes;
521 bmp16.bmBitsPixel = bmp32->bmBitsPixel;
522 bmp16.bmBits = (SEGPTR)0;
523 memcpy( buffer, &bmp16, count );
528 FIXME("not implemented for DIBs: count %d\n", count);
535 bmp16.bmType = bmp->bitmap.bmType;
536 bmp16.bmWidth = bmp->bitmap.bmWidth;
537 bmp16.bmHeight = bmp->bitmap.bmHeight;
538 bmp16.bmWidthBytes = bmp->bitmap.bmWidthBytes;
539 bmp16.bmPlanes = bmp->bitmap.bmPlanes;
540 bmp16.bmBitsPixel = bmp->bitmap.bmBitsPixel;
541 bmp16.bmBits = (SEGPTR)0;
542 if (count > sizeof(bmp16)) count = sizeof(bmp16);
543 memcpy( buffer, &bmp16, count );
549 /***********************************************************************
552 static INT BITMAP_GetObject( HGDIOBJ handle, void *obj, INT count, LPVOID buffer )
554 BITMAPOBJ *bmp = obj;
559 return sizeof(DIBSECTION);
560 if (count < sizeof(DIBSECTION))
562 if (count > sizeof(BITMAP)) count = sizeof(BITMAP);
566 if (count > sizeof(DIBSECTION)) count = sizeof(DIBSECTION);
569 memcpy( buffer, bmp->dib, count );
575 return sizeof(BITMAP);
576 if (count > sizeof(BITMAP)) count = sizeof(BITMAP);
577 memcpy( buffer, &bmp->bitmap, count );
583 /******************************************************************************
584 * CreateDiscardableBitmap [GDI32.@] Creates a discardable bitmap
587 * Success: Handle to bitmap
590 HBITMAP WINAPI CreateDiscardableBitmap(
591 HDC hdc, /* [in] Handle to device context */
592 INT width, /* [in] Bitmap width */
593 INT height) /* [in] Bitmap height */
595 return CreateCompatibleBitmap( hdc, width, height );
599 /******************************************************************************
600 * GetBitmapDimensionEx [GDI32.@] Retrieves dimensions of a bitmap
606 BOOL WINAPI GetBitmapDimensionEx(
607 HBITMAP hbitmap, /* [in] Handle to bitmap */
608 LPSIZE size) /* [out] Address of struct receiving dimensions */
610 BITMAPOBJ * bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
611 if (!bmp) return FALSE;
613 GDI_ReleaseObj( hbitmap );
618 /******************************************************************************
619 * SetBitmapDimensionEx [GDI32.@] Assignes dimensions to a bitmap
625 BOOL WINAPI SetBitmapDimensionEx(
626 HBITMAP hbitmap, /* [in] Handle to bitmap */
627 INT x, /* [in] Bitmap width */
628 INT y, /* [in] Bitmap height */
629 LPSIZE prevSize) /* [out] Address of structure for orig dims */
631 BITMAPOBJ * bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
632 if (!bmp) return FALSE;
633 if (prevSize) *prevSize = bmp->size;
636 GDI_ReleaseObj( hbitmap );