objects/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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #include "wine/winbase16.h"
  26 #include "gdi.h"
  27 #include "bitmap.h"
  28 #include "selectors.h"
  29 #include "wine/debug.h"
  30 #include "wine/winuser16.h"
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(bitmap);
  33
  34
  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 );
  39
  40 static const struct gdi_obj_funcs bitmap_funcs =
  41 {
  42     BITMAP_SelectObject,  /* pSelectObject */
  43     BITMAP_GetObject16,   /* pGetObject16 */
  44     BITMAP_GetObject,     /* pGetObjectA */
  45     BITMAP_GetObject,     /* pGetObjectW */
  46     NULL,                 /* pUnrealizeObject */
  47     BITMAP_DeleteObject   /* pDeleteObject */
  48 };
  49
  50 /***********************************************************************
  51  *           BITMAP_GetWidthBytes
  52  *
  53  * Return number of bytes taken by a scanline of 16-bit aligned Windows DDB
  54  * data.
  55  */
  56 INT BITMAP_GetWidthBytes( INT bmWidth, INT bpp )
  57 {
  58     switch(bpp)
  59     {
  60     case 1:
  61         return 2 * ((bmWidth+15) >> 4);
  62
  63     case 24:
  64         bmWidth *= 3; /* fall through */
  65     case 8:
  66         return bmWidth + (bmWidth & 1);
  67
  68     case 32:
  69         return bmWidth * 4;
  70
  71     case 16:
  72     case 15:
  73         return bmWidth * 2;
  74
  75     case 4:
  76         return 2 * ((bmWidth+3) >> 2);
  77
  78     default:
  79         WARN("Unknown depth %d, please report.\n", bpp );
  80     }
  81     return -1;
  82 }
  83
  84 /***********************************************************************
  85  *           CreateUserBitmap    (GDI.407)
  86  */
  87 HBITMAP16 WINAPI CreateUserBitmap16( INT16 width, INT16 height, UINT16 planes,
  88                                      UINT16 bpp, LPCVOID bits )
  89 {
  90     return CreateBitmap16( width, height, planes, bpp, bits );
  91 }
  92
  93 /***********************************************************************
  94  *           CreateUserDiscardableBitmap    (GDI.409)
  95  */
  96 HBITMAP16 WINAPI CreateUserDiscardableBitmap16( WORD dummy,
  97                                                 INT16 width, INT16 height )
  98 {
  99     HDC hdc = CreateDCA( "DISPLAY", NULL, NULL, NULL );
 100     HBITMAP16 ret = CreateCompatibleBitmap16( hdc, width, height );
 101     DeleteDC( hdc );
 102     return ret;
 103 }
 104
 105
 106 /***********************************************************************
 107  *           CreateBitmap    (GDI.48)
 108  */
 109 HBITMAP16 WINAPI CreateBitmap16( INT16 width, INT16 height, UINT16 planes,
 110                                  UINT16 bpp, LPCVOID bits )
 111 {
 112     return CreateBitmap( width, height, planes, bpp, bits );
 113 }
 114
 115
 116 /******************************************************************************
 117  * CreateBitmap [GDI32.@]  Creates a bitmap with the specified info
 118  *
 119  * PARAMS
 120  *    width  [I] bitmap width
 121  *    height [I] bitmap height
 122  *    planes [I] Number of color planes
 123  *    bpp    [I] Number of bits to identify a color
 124  *    bits   [I] Pointer to array containing color data
 125  *
 126  * RETURNS
 127  *    Success: Handle to bitmap
 128  *    Failure: 0
 129  */
 130 HBITMAP WINAPI CreateBitmap( INT width, INT height, UINT planes,
 131                                  UINT bpp, LPCVOID bits )
 132 {
 133     BITMAPOBJ *bmp;
 134     HBITMAP hbitmap;
 135
 136     planes = (BYTE)planes;
 137     bpp    = (BYTE)bpp;
 138
 139
 140       /* Check parameters */
 141     if (!height || !width)
 142     {
 143         height = 1;
 144         width  = 1;
 145         planes = 1;
 146         bpp    = 1;
 147     }
 148     if (planes != 1) {
 149         FIXME("planes = %d\n", planes);
 150         return 0;
 151     }
 152     if (height < 0) height = -height;
 153     if (width < 0) width = -width;
 154
 155       /* Create the BITMAPOBJ */
 156     if (!(bmp = GDI_AllocObject( sizeof(BITMAPOBJ), BITMAP_MAGIC, &hbitmap, &bitmap_funcs )))
 157         return 0;
 158
 159     TRACE("%dx%d, %d colors returning %08x\n", width, height,
 160           1 << (planes*bpp), hbitmap);
 161
 162     bmp->size.cx = 0;
 163     bmp->size.cy = 0;
 164     bmp->bitmap.bmType = 0;
 165     bmp->bitmap.bmWidth = width;
 166     bmp->bitmap.bmHeight = height;
 167     bmp->bitmap.bmPlanes = planes;
 168     bmp->bitmap.bmBitsPixel = bpp;
 169     bmp->bitmap.bmWidthBytes = BITMAP_GetWidthBytes( width, bpp );
 170     bmp->bitmap.bmBits = NULL;
 171
 172     bmp->funcs = NULL;
 173     bmp->physBitmap = NULL;
 174     bmp->dib = NULL;
 175     bmp->segptr_bits = 0;
 176
 177     if (bits) /* Set bitmap bits */
 178         SetBitmapBits( hbitmap, height * bmp->bitmap.bmWidthBytes,
 179                          bits );
 180     GDI_ReleaseObj( hbitmap );
 181     return hbitmap;
 182 }
 183
 184
 185 /***********************************************************************
 186  *           CreateCompatibleBitmap    (GDI.51)
 187  */
 188 HBITMAP16 WINAPI CreateCompatibleBitmap16(HDC16 hdc, INT16 width, INT16 height)
 189 {
 190     return CreateCompatibleBitmap( hdc, width, height );
 191 }
 192
 193
 194 /******************************************************************************
 195  * CreateCompatibleBitmap [GDI32.@]  Creates a bitmap compatible with the DC
 196  *
 197  * PARAMS
 198  *    hdc    [I] Handle to device context
 199  *    width  [I] Width of bitmap
 200  *    height [I] Height of bitmap
 201  *
 202  * RETURNS
 203  *    Success: Handle to bitmap
 204  *    Failure: 0
 205  */
 206 HBITMAP WINAPI CreateCompatibleBitmap( HDC hdc, INT width, INT height)
 207 {
 208     HBITMAP hbmpRet = 0;
 209     DC *dc;
 210
 211     TRACE("(%04x,%d,%d) = \n", hdc, width, height );
 212     if (!(dc = DC_GetDCPtr( hdc ))) return 0;
 213     if ((width >= 0x10000) || (height >= 0x10000)) {
 214         FIXME("got bad width %d or height %d, please look for reason\n",
 215               width, height );
 216     } else {
 217         /* MS doc says if width or height is 0, return 1-by-1 pixel, monochrome bitmap */
 218         if (!width || !height)
 219            hbmpRet = CreateBitmap( 1, 1, 1, 1, NULL );
 220         else
 221            hbmpRet = CreateBitmap( width, height, 1, dc->bitsPerPixel, NULL );
 222
 223         if (!BITMAP_SetOwnerDC( hbmpRet, dc ))
 224         {
 225             DeleteObject( hbmpRet );
 226             hbmpRet = 0;
 227         }
 228     }
 229     TRACE("\t\t%04x\n", hbmpRet);
 230     GDI_ReleaseObj(hdc);
 231     return hbmpRet;
 232 }
 233
 234
 235 /***********************************************************************
 236  *           CreateBitmapIndirect    (GDI.49)
 237  */
 238 HBITMAP16 WINAPI CreateBitmapIndirect16( const BITMAP16 * bmp )
 239 {
 240     return CreateBitmap16( bmp->bmWidth, bmp->bmHeight, bmp->bmPlanes,
 241                            bmp->bmBitsPixel, MapSL( bmp->bmBits ) );
 242 }
 243
 244
 245 /******************************************************************************
 246  * CreateBitmapIndirect [GDI32.@]  Creates a bitmap with the specifies info
 247  *
 248  * RETURNS
 249  *    Success: Handle to bitmap
 250  *    Failure: NULL
 251  */
 252 HBITMAP WINAPI CreateBitmapIndirect(
 253     const BITMAP * bmp) /* [in] Pointer to the bitmap data */
 254 {
 255     return CreateBitmap( bmp->bmWidth, bmp->bmHeight, bmp->bmPlanes,
 256                            bmp->bmBitsPixel, bmp->bmBits );
 257 }
 258
 259
 260 /***********************************************************************
 261  *           GetBitmapBits    (GDI.74)
 262  */
 263 LONG WINAPI GetBitmapBits16( HBITMAP16 hbitmap, LONG count, LPVOID buffer )
 264 {
 265     return GetBitmapBits( hbitmap, count, buffer );
 266 }
 267
 268
 269 /***********************************************************************
 270  * GetBitmapBits [GDI32.@]  Copies bitmap bits of bitmap to buffer
 271  *
 272  * RETURNS
 273  *    Success: Number of bytes copied
 274  *    Failure: 0
 275  */
 276 LONG WINAPI GetBitmapBits(
 277     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 278     LONG count,        /* [in]  Number of bytes to copy */
 279     LPVOID bits)       /* [out] Pointer to buffer to receive bits */
 280 {
 281     BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 282     LONG height, ret;
 283
 284     if (!bmp) return 0;
 285
 286     /* If the bits vector is null, the function should return the read size */
 287     if(bits == NULL)
 288     {
 289         ret = bmp->bitmap.bmWidthBytes * bmp->bitmap.bmHeight;
 290         goto done;
 291     }
 292
 293     if (count < 0) {
 294         WARN("(%ld): Negative number of bytes passed???\n", count );
 295         count = -count;
 296     }
 297
 298     /* Only get entire lines */
 299     height = count / bmp->bitmap.bmWidthBytes;
 300     if (height > bmp->bitmap.bmHeight) height = bmp->bitmap.bmHeight;
 301     count = height * bmp->bitmap.bmWidthBytes;
 302     if (count == 0)
 303       {
 304         WARN("Less than one entire line requested\n");
 305         ret = 0;
 306         goto done;
 307       }
 308
 309
 310     TRACE("(%08x, %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 );
 313
 314     if(bmp->funcs)
 315     {
 316         TRACE("Calling device specific BitmapBits\n");
 317         if(bmp->funcs->pGetBitmapBits)
 318             ret = bmp->funcs->pGetBitmapBits(hbitmap, bits, count);
 319         else
 320         {
 321             memset( bits, 0, count );
 322             ret = count;
 323         }
 324     } else {
 325
 326         if(!bmp->bitmap.bmBits) {
 327             WARN("Bitmap is empty\n");
 328             ret = 0;
 329         } else {
 330             memcpy(bits, bmp->bitmap.bmBits, count);
 331             ret = count;
 332         }
 333
 334     }
 335  done:
 336     GDI_ReleaseObj( hbitmap );
 337     return ret;
 338 }
 339
 340
 341 /***********************************************************************
 342  *           SetBitmapBits    (GDI.106)
 343  */
 344 LONG WINAPI SetBitmapBits16( HBITMAP16 hbitmap, LONG count, LPCVOID buffer )
 345 {
 346     return SetBitmapBits( hbitmap, count, buffer );
 347 }
 348
 349
 350 /******************************************************************************
 351  * SetBitmapBits [GDI32.@]  Sets bits of color data for a bitmap
 352  *
 353  * RETURNS
 354  *    Success: Number of bytes used in setting the bitmap bits
 355  *    Failure: 0
 356  */
 357 LONG WINAPI SetBitmapBits(
 358     HBITMAP hbitmap, /* [in] Handle to bitmap */
 359     LONG count,        /* [in] Number of bytes in bitmap array */
 360     LPCVOID bits)      /* [in] Address of array with bitmap bits */
 361 {
 362     BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 363     LONG height, ret;
 364
 365     if ((!bmp) || (!bits))
 366         return 0;
 367
 368     if (count < 0) {
 369         WARN("(%ld): Negative number of bytes passed???\n", count );
 370         count = -count;
 371     }
 372
 373     /* Only get entire lines */
 374     height = count / bmp->bitmap.bmWidthBytes;
 375     if (height > bmp->bitmap.bmHeight) height = bmp->bitmap.bmHeight;
 376     count = height * bmp->bitmap.bmWidthBytes;
 377
 378     TRACE("(%08x, %ld, %p) %dx%d %d colors fetched height: %ld\n",
 379           hbitmap, count, bits, bmp->bitmap.bmWidth, bmp->bitmap.bmHeight,
 380           1 << bmp->bitmap.bmBitsPixel, height );
 381
 382     if(bmp->funcs) {
 383
 384         TRACE("Calling device specific BitmapBits\n");
 385         if(bmp->funcs->pSetBitmapBits)
 386             ret = bmp->funcs->pSetBitmapBits(hbitmap, bits, count);
 387         else
 388             ret = 0;
 389     } else {
 390
 391         if(!bmp->bitmap.bmBits) /* Alloc enough for entire bitmap */
 392             bmp->bitmap.bmBits = HeapAlloc( GetProcessHeap(), 0, count );
 393         if(!bmp->bitmap.bmBits) {
 394             WARN("Unable to allocate bit buffer\n");
 395             ret = 0;
 396         } else {
 397             memcpy(bmp->bitmap.bmBits, bits, count);
 398             ret = count;
 399         }
 400     }
 401
 402     GDI_ReleaseObj( hbitmap );
 403     return ret;
 404 }
 405
 406 /**********************************************************************
 407  *              BITMAP_CopyBitmap
 408  *
 409  */
 410 HBITMAP BITMAP_CopyBitmap(HBITMAP hbitmap)
 411 {
 412     BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 413     HBITMAP res = 0;
 414     BITMAP bm;
 415
 416     if(!bmp) return 0;
 417
 418     bm = bmp->bitmap;
 419     bm.bmBits = NULL;
 420     res = CreateBitmapIndirect(&bm);
 421
 422     if(res) {
 423         char *buf = HeapAlloc( GetProcessHeap(), 0, bm.bmWidthBytes *
 424                                bm.bmHeight );
 425         GetBitmapBits (hbitmap, bm.bmWidthBytes * bm.bmHeight, buf);
 426         SetBitmapBits (res, bm.bmWidthBytes * bm.bmHeight, buf);
 427         HeapFree( GetProcessHeap(), 0, buf );
 428     }
 429
 430     GDI_ReleaseObj( hbitmap );
 431     return res;
 432 }
 433
 434
 435 /***********************************************************************
 436  *           BITMAP_SetOwnerDC
 437  *
 438  * Set the type of DC that owns the bitmap. This is used when the
 439  * bitmap is selected into a device to initialize the bitmap function
 440  * table.
 441  */
 442 BOOL BITMAP_SetOwnerDC( HBITMAP hbitmap, DC *dc )
 443 {
 444     BITMAPOBJ *bitmap;
 445     BOOL ret;
 446
 447     /* never set the owner of the stock bitmap since it can be selected in multiple DCs */
 448     if (hbitmap == GetStockObject(DEFAULT_BITMAP)) return TRUE;
 449
 450     if (!(bitmap = GDI_GetObjPtr( hbitmap, BITMAP_MAGIC ))) return FALSE;
 451
 452     ret = TRUE;
 453     if (!bitmap->funcs)  /* not owned by a DC yet */
 454     {
 455         if (dc->funcs->pCreateBitmap) ret = dc->funcs->pCreateBitmap( dc->physDev, hbitmap );
 456         if (ret) bitmap->funcs = dc->funcs;
 457     }
 458     else if (bitmap->funcs != dc->funcs)
 459     {
 460         FIXME( "Trying to select bitmap %x in different DC type\n", hbitmap );
 461         ret = FALSE;
 462     }
 463     GDI_ReleaseObj( hbitmap );
 464     return ret;
 465 }
 466
 467
 468 /***********************************************************************
 469  *           BITMAP_SelectObject
 470  */
 471 static HGDIOBJ BITMAP_SelectObject( HGDIOBJ handle, void *obj, HDC hdc )
 472 {
 473     HGDIOBJ ret = handle;
 474     BITMAPOBJ *bitmap = obj;
 475     DC *dc = DC_GetDCPtr( hdc );
 476
 477     if (!dc) return 0;
 478     if (!(dc->flags & DC_MEMORY))
 479     {
 480         GDI_ReleaseObj( hdc );
 481         return 0;
 482     }
 483     if (handle == dc->hBitmap) goto done;  /* nothing to do */
 484
 485     if (bitmap->header.dwCount && (handle != GetStockObject(DEFAULT_BITMAP)))
 486     {
 487         WARN( "Bitmap already selected in another DC\n" );
 488         GDI_ReleaseObj( hdc );
 489         return 0;
 490     }
 491
 492     if (!bitmap->funcs && !BITMAP_SetOwnerDC( handle, dc ))
 493     {
 494         GDI_ReleaseObj( hdc );
 495         return 0;
 496     }
 497
 498     if (dc->funcs->pSelectBitmap) ret = dc->funcs->pSelectBitmap( dc->physDev, handle );
 499
 500     if (ret)
 501     {
 502         dc->hBitmap            = ret;
 503         dc->totalExtent.left   = 0;
 504         dc->totalExtent.top    = 0;
 505         dc->totalExtent.right  = bitmap->bitmap.bmWidth;
 506         dc->totalExtent.bottom = bitmap->bitmap.bmHeight;
 507         dc->flags &= ~DC_DIRTY;
 508         SetRectRgn( dc->hVisRgn, 0, 0, bitmap->bitmap.bmWidth, bitmap->bitmap.bmHeight);
 509         CLIPPING_UpdateGCRegion( dc );
 510
 511         if (dc->bitsPerPixel != bitmap->bitmap.bmBitsPixel)
 512         {
 513             /* depth changed, reinitialize the DC */
 514             dc->bitsPerPixel = bitmap->bitmap.bmBitsPixel;
 515             DC_InitDC( dc );
 516         }
 517     }
 518  done:
 519     GDI_ReleaseObj( hdc );
 520     return ret;
 521 }
 522
 523
 524 /***********************************************************************
 525  *           BITMAP_DeleteObject
 526  */
 527 static BOOL BITMAP_DeleteObject( HGDIOBJ handle, void *obj )
 528 {
 529     BITMAPOBJ * bmp = obj;
 530
 531     if (bmp->funcs && bmp->funcs->pDeleteBitmap)
 532         bmp->funcs->pDeleteBitmap( handle );
 533
 534     if( bmp->bitmap.bmBits )
 535         HeapFree( GetProcessHeap(), 0, bmp->bitmap.bmBits );
 536
 537     if (bmp->dib)
 538     {
 539         DIBSECTION *dib = bmp->dib;
 540
 541         if (dib->dsBm.bmBits)
 542         {
 543             if (dib->dshSection)
 544             {
 545                 SYSTEM_INFO SystemInfo;
 546                 GetSystemInfo( &SystemInfo );
 547                 UnmapViewOfFile( (char *)dib->dsBm.bmBits -
 548                                  (dib->dsOffset % SystemInfo.dwAllocationGranularity) );
 549             }
 550             else if (!dib->dsOffset)
 551                 VirtualFree(dib->dsBm.bmBits, 0L, MEM_RELEASE );
 552         }
 553         HeapFree(GetProcessHeap(), 0, dib);
 554         bmp->dib = NULL;
 555         if (bmp->segptr_bits)
 556         { /* free its selector array */
 557             WORD sel = SELECTOROF(bmp->segptr_bits);
 558             WORD count = (GetSelectorLimit16(sel) / 0x10000) + 1;
 559             int i;
 560
 561             for (i = 0; i < count; i++) FreeSelector16(sel + (i << __AHSHIFT));
 562         }
 563     }
 564     return GDI_FreeObject( handle, obj );
 565 }
 566
 567
 568 /***********************************************************************
 569  *           BITMAP_GetObject16
 570  */
 571 static INT BITMAP_GetObject16( HGDIOBJ handle, void *obj, INT count, LPVOID buffer )
 572 {
 573     BITMAPOBJ *bmp = obj;
 574
 575     if (bmp->dib)
 576     {
 577         if ( count <= sizeof(BITMAP16) )
 578         {
 579             BITMAP *bmp32 = &bmp->dib->dsBm;
 580             BITMAP16 bmp16;
 581             bmp16.bmType       = bmp32->bmType;
 582             bmp16.bmWidth      = bmp32->bmWidth;
 583             bmp16.bmHeight     = bmp32->bmHeight;
 584             bmp16.bmWidthBytes = bmp32->bmWidthBytes;
 585             bmp16.bmPlanes     = bmp32->bmPlanes;
 586             bmp16.bmBitsPixel  = bmp32->bmBitsPixel;
 587             bmp16.bmBits       = (SEGPTR)0;
 588             memcpy( buffer, &bmp16, count );
 589             return count;
 590         }
 591         else
 592         {
 593             FIXME("not implemented for DIBs: count %d\n", count);
 594             return 0;
 595         }
 596     }
 597     else
 598     {
 599         BITMAP16 bmp16;
 600         bmp16.bmType       = bmp->bitmap.bmType;
 601         bmp16.bmWidth      = bmp->bitmap.bmWidth;
 602         bmp16.bmHeight     = bmp->bitmap.bmHeight;
 603         bmp16.bmWidthBytes = bmp->bitmap.bmWidthBytes;
 604         bmp16.bmPlanes     = bmp->bitmap.bmPlanes;
 605         bmp16.bmBitsPixel  = bmp->bitmap.bmBitsPixel;
 606         bmp16.bmBits       = (SEGPTR)0;
 607         if (count > sizeof(bmp16)) count = sizeof(bmp16);
 608         memcpy( buffer, &bmp16, count );
 609         return count;
 610     }
 611 }
 612
 613
 614 /***********************************************************************
 615  *           BITMAP_GetObject
 616  */
 617 static INT BITMAP_GetObject( HGDIOBJ handle, void *obj, INT count, LPVOID buffer )
 618 {
 619     BITMAPOBJ *bmp = obj;
 620
 621     if (bmp->dib)
 622     {
 623         if (count < sizeof(DIBSECTION))
 624         {
 625             if (count > sizeof(BITMAP)) count = sizeof(BITMAP);
 626         }
 627         else
 628         {
 629             if (count > sizeof(DIBSECTION)) count = sizeof(DIBSECTION);
 630         }
 631
 632         memcpy( buffer, bmp->dib, count );
 633         return count;
 634     }
 635     else
 636     {
 637         if (count > sizeof(BITMAP)) count = sizeof(BITMAP);
 638         memcpy( buffer, &bmp->bitmap, count );
 639         return count;
 640     }
 641 }
 642
 643
 644 /***********************************************************************
 645  *           CreateDiscardableBitmap    (GDI.156)
 646  */
 647 HBITMAP16 WINAPI CreateDiscardableBitmap16( HDC16 hdc, INT16 width,
 648                                             INT16 height )
 649 {
 650     return CreateCompatibleBitmap16( hdc, width, height );
 651 }
 652
 653
 654 /******************************************************************************
 655  * CreateDiscardableBitmap [GDI32.@]  Creates a discardable bitmap
 656  *
 657  * RETURNS
 658  *    Success: Handle to bitmap
 659  *    Failure: NULL
 660  */
 661 HBITMAP WINAPI CreateDiscardableBitmap(
 662     HDC hdc,    /* [in] Handle to device context */
 663     INT width,  /* [in] Bitmap width */
 664     INT height) /* [in] Bitmap height */
 665 {
 666     return CreateCompatibleBitmap( hdc, width, height );
 667 }
 668
 669
 670 /***********************************************************************
 671  *           GetBitmapDimensionEx    (GDI.468)
 672  *
 673  * NOTES
 674  *    Can this call GetBitmapDimensionEx?
 675  */
 676 BOOL16 WINAPI GetBitmapDimensionEx16( HBITMAP16 hbitmap, LPSIZE16 size )
 677 {
 678     BITMAPOBJ * bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 679     if (!bmp) return FALSE;
 680     size->cx = bmp->size.cx;
 681     size->cy = bmp->size.cy;
 682     GDI_ReleaseObj( hbitmap );
 683     return TRUE;
 684 }
 685
 686
 687 /******************************************************************************
 688  * GetBitmapDimensionEx [GDI32.@]  Retrieves dimensions of a bitmap
 689  *
 690  * RETURNS
 691  *    Success: TRUE
 692  *    Failure: FALSE
 693  */
 694 BOOL WINAPI GetBitmapDimensionEx(
 695     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 696     LPSIZE size)     /* [out] Address of struct receiving dimensions */
 697 {
 698     BITMAPOBJ * bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 699     if (!bmp) return FALSE;
 700     *size = bmp->size;
 701     GDI_ReleaseObj( hbitmap );
 702     return TRUE;
 703 }
 704
 705
 706 /***********************************************************************
 707  *           GetBitmapDimension    (GDI.162)
 708  */
 709 DWORD WINAPI GetBitmapDimension16( HBITMAP16 hbitmap )
 710 {
 711     SIZE16 size;
 712     if (!GetBitmapDimensionEx16( hbitmap, &size )) return 0;
 713     return MAKELONG( size.cx, size.cy );
 714 }
 715
 716
 717 /***********************************************************************
 718  *           SetBitmapDimensionEx    (GDI.478)
 719  */
 720 BOOL16 WINAPI SetBitmapDimensionEx16( HBITMAP16 hbitmap, INT16 x, INT16 y,
 721                                       LPSIZE16 prevSize )
 722 {
 723     BITMAPOBJ * bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 724     if (!bmp) return FALSE;
 725     if (prevSize)
 726     {
 727         prevSize->cx = bmp->size.cx;
 728         prevSize->cy = bmp->size.cy;
 729     }
 730     bmp->size.cx = x;
 731     bmp->size.cy = y;
 732     GDI_ReleaseObj( hbitmap );
 733     return TRUE;
 734 }
 735
 736
 737 /******************************************************************************
 738  * SetBitmapDimensionEx [GDI32.@]  Assignes dimensions to a bitmap
 739  *
 740  * RETURNS
 741  *    Success: TRUE
 742  *    Failure: FALSE
 743  */
 744 BOOL WINAPI SetBitmapDimensionEx(
 745     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 746     INT x,           /* [in]  Bitmap width */
 747     INT y,           /* [in]  Bitmap height */
 748     LPSIZE prevSize) /* [out] Address of structure for orig dims */
 749 {
 750     BITMAPOBJ * bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 751     if (!bmp) return FALSE;
 752     if (prevSize) *prevSize = bmp->size;
 753     bmp->size.cx = x;
 754     bmp->size.cy = y;
 755     GDI_ReleaseObj( hbitmap );
 756     return TRUE;
 757 }
 758
 759
 760 /***********************************************************************
 761  *           SetBitmapDimension    (GDI.163)
 762  */
 763 DWORD WINAPI SetBitmapDimension16( HBITMAP16 hbitmap, INT16 x, INT16 y )
 764 {
 765     SIZE16 size;
 766     if (!SetBitmapDimensionEx16( hbitmap, x, y, &size )) return 0;
 767     return MAKELONG( size.cx, size.cy );
 768 }
 769