dlls/gdi/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 "wine/winuser16.h"
  27 #include "gdi.h"
  28 #include "gdi_private.h"
  29 #include "wine/debug.h"
  30
  31 WINE_DEFAULT_DEBUG_CHANNEL(bitmap);
  32
  33
  34 static HGDIOBJ BITMAP_SelectObject( HGDIOBJ handle, void *obj, HDC hdc );
  35 static INT BITMAP_GetObject16( HGDIOBJ handle, void *obj, INT count, LPVOID buffer );
  36 static INT BITMAP_GetObject( HGDIOBJ handle, void *obj, INT count, LPVOID buffer );
  37 static BOOL BITMAP_DeleteObject( HGDIOBJ handle, void *obj );
  38
  39 static const struct gdi_obj_funcs bitmap_funcs =
  40 {
  41     BITMAP_SelectObject,  /* pSelectObject */
  42     BITMAP_GetObject16,   /* pGetObject16 */
  43     BITMAP_GetObject,     /* pGetObjectA */
  44     BITMAP_GetObject,     /* pGetObjectW */
  45     NULL,                 /* pUnrealizeObject */
  46     BITMAP_DeleteObject   /* pDeleteObject */
  47 };
  48
  49 /***********************************************************************
  50  *           BITMAP_GetWidthBytes
  51  *
  52  * Return number of bytes taken by a scanline of 16-bit aligned Windows DDB
  53  * data.
  54  */
  55 static INT BITMAP_GetWidthBytes( INT bmWidth, INT bpp )
  56 {
  57     switch(bpp)
  58     {
  59     case 1:
  60         return 2 * ((bmWidth+15) >> 4);
  61
  62     case 24:
  63         bmWidth *= 3; /* fall through */
  64     case 8:
  65         return bmWidth + (bmWidth & 1);
  66
  67     case 32:
  68         return bmWidth * 4;
  69
  70     case 16:
  71     case 15:
  72         return bmWidth * 2;
  73
  74     case 4:
  75         return 2 * ((bmWidth+3) >> 2);
  76
  77     default:
  78         WARN("Unknown depth %d, please report.\n", bpp );
  79     }
  80     return -1;
  81 }
  82
  83
  84 /******************************************************************************
  85  * CreateBitmap [GDI32.@]
  86  *
  87  * Creates a bitmap with the specified info.
  88  *
  89  * PARAMS
  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
  95  *
  96  * RETURNS
  97  *    Success: Handle to bitmap
  98  *    Failure: 0
  99  */
 100 HBITMAP WINAPI CreateBitmap( INT width, INT height, UINT planes,
 101                                  UINT bpp, LPCVOID bits )
 102 {
 103     BITMAPOBJ *bmp;
 104     HBITMAP hbitmap;
 105
 106     planes = (BYTE)planes;
 107     bpp    = (BYTE)bpp;
 108
 109
 110       /* Check parameters */
 111     if (!height || !width)
 112     {
 113         height = 1;
 114         width  = 1;
 115         planes = 1;
 116         bpp    = 1;
 117     }
 118     if (planes != 1) {
 119         FIXME("planes = %d\n", planes);
 120         return 0;
 121     }
 122     if (height < 0) height = -height;
 123     if (width < 0) width = -width;
 124
 125       /* Create the BITMAPOBJ */
 126     if (!(bmp = GDI_AllocObject( sizeof(BITMAPOBJ), BITMAP_MAGIC,
 127                                  (HGDIOBJ *)&hbitmap, &bitmap_funcs )))
 128         return 0;
 129
 130     TRACE("%dx%d, %d colors returning %p\n", width, height, 1 << (planes*bpp), hbitmap);
 131
 132     bmp->size.cx = 0;
 133     bmp->size.cy = 0;
 134     bmp->bitmap.bmType = 0;
 135     bmp->bitmap.bmWidth = width;
 136     bmp->bitmap.bmHeight = height;
 137     bmp->bitmap.bmPlanes = planes;
 138     bmp->bitmap.bmBitsPixel = bpp;
 139     bmp->bitmap.bmWidthBytes = BITMAP_GetWidthBytes( width, bpp );
 140     bmp->bitmap.bmBits = NULL;
 141
 142     bmp->funcs = NULL;
 143     bmp->physBitmap = NULL;
 144     bmp->dib = NULL;
 145     bmp->segptr_bits = 0;
 146
 147     if (bits) /* Set bitmap bits */
 148         SetBitmapBits( hbitmap, height * bmp->bitmap.bmWidthBytes,
 149                          bits );
 150     GDI_ReleaseObj( hbitmap );
 151     return hbitmap;
 152 }
 153
 154
 155 /******************************************************************************
 156  * CreateCompatibleBitmap [GDI32.@]
 157  *
 158  * Creates a bitmap compatible with the DC.
 159  *
 160  * PARAMS
 161  *    hdc    [I] Handle to device context
 162  *    width  [I] Width of bitmap
 163  *    height [I] Height of bitmap
 164  *
 165  * RETURNS
 166  *    Success: Handle to bitmap
 167  *    Failure: 0
 168  */
 169 HBITMAP WINAPI CreateCompatibleBitmap( HDC hdc, INT width, INT height)
 170 {
 171     HBITMAP hbmpRet = 0;
 172     DC *dc;
 173
 174     TRACE("(%p,%d,%d) = \n", hdc, width, height );
 175     if (!(dc = DC_GetDCPtr( hdc ))) return 0;
 176     if ((width >= 0x10000) || (height >= 0x10000)) {
 177         FIXME("got bad width %d or height %d, please look for reason\n",
 178               width, height );
 179     }
 180     else
 181     {
 182         INT planes, bpp;
 183
 184         if (GDIMAGIC( dc->header.wMagic ) != MEMORY_DC_MAGIC)
 185         {
 186             planes = GetDeviceCaps( hdc, PLANES );
 187             bpp = GetDeviceCaps( hdc, BITSPIXEL );
 188         }
 189         else  /* memory DC, get the depth of the bitmap */
 190         {
 191             BITMAPOBJ *bmp = GDI_GetObjPtr( dc->hBitmap, BITMAP_MAGIC );
 192             planes = bmp->bitmap.bmPlanes;
 193             bpp = bmp->bitmap.bmBitsPixel;
 194             GDI_ReleaseObj( dc->hBitmap );
 195         }
 196         hbmpRet = CreateBitmap( width, height, planes, bpp, NULL );
 197     }
 198     TRACE("\t\t%p\n", hbmpRet);
 199     GDI_ReleaseObj(hdc);
 200     return hbmpRet;
 201 }
 202
 203
 204 /******************************************************************************
 205  * CreateBitmapIndirect [GDI32.@]
 206  *
 207  * Creates a bitmap with the specifies info.
 208  *
 209  * RETURNS
 210  *    Success: Handle to bitmap
 211  *    Failure: NULL
 212  */
 213 HBITMAP WINAPI CreateBitmapIndirect(
 214     const BITMAP * bmp) /* [in] Pointer to the bitmap data */
 215 {
 216     return CreateBitmap( bmp->bmWidth, bmp->bmHeight, bmp->bmPlanes,
 217                            bmp->bmBitsPixel, bmp->bmBits );
 218 }
 219
 220
 221 /***********************************************************************
 222  * GetBitmapBits [GDI32.@]
 223  *
 224  * Copies bitmap bits of bitmap to buffer.
 225  *
 226  * RETURNS
 227  *    Success: Number of bytes copied
 228  *    Failure: 0
 229  */
 230 LONG WINAPI GetBitmapBits(
 231     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 232     LONG count,        /* [in]  Number of bytes to copy */
 233     LPVOID bits)       /* [out] Pointer to buffer to receive bits */
 234 {
 235     BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 236     LONG height, ret;
 237
 238     if (!bmp) return 0;
 239
 240     /* If the bits vector is null, the function should return the read size */
 241     if(bits == NULL)
 242     {
 243         ret = bmp->bitmap.bmWidthBytes * bmp->bitmap.bmHeight;
 244         goto done;
 245     }
 246
 247     if (count < 0) {
 248         WARN("(%ld): Negative number of bytes passed???\n", count );
 249         count = -count;
 250     }
 251
 252     /* Only get entire lines */
 253     height = count / bmp->bitmap.bmWidthBytes;
 254     if (height > bmp->bitmap.bmHeight) height = bmp->bitmap.bmHeight;
 255     count = height * bmp->bitmap.bmWidthBytes;
 256     if (count == 0)
 257       {
 258         WARN("Less than one entire line requested\n");
 259         ret = 0;
 260         goto done;
 261       }
 262
 263
 264     TRACE("(%p, %ld, %p) %dx%d %d colors fetched height: %ld\n",
 265           hbitmap, count, bits, bmp->bitmap.bmWidth, bmp->bitmap.bmHeight,
 266           1 << bmp->bitmap.bmBitsPixel, height );
 267
 268     if(bmp->funcs && bmp->funcs->pGetBitmapBits)
 269     {
 270         TRACE("Calling device specific BitmapBits\n");
 271         ret = bmp->funcs->pGetBitmapBits(hbitmap, bits, count);
 272     } else {
 273
 274         if(!bmp->bitmap.bmBits) {
 275             WARN("Bitmap is empty\n");
 276             ret = 0;
 277         } else {
 278             memcpy(bits, bmp->bitmap.bmBits, count);
 279             ret = count;
 280         }
 281
 282     }
 283  done:
 284     GDI_ReleaseObj( hbitmap );
 285     return ret;
 286 }
 287
 288
 289 /******************************************************************************
 290  * SetBitmapBits [GDI32.@]
 291  *
 292  * Sets bits of color data for a bitmap.
 293  *
 294  * RETURNS
 295  *    Success: Number of bytes used in setting the bitmap bits
 296  *    Failure: 0
 297  */
 298 LONG WINAPI SetBitmapBits(
 299     HBITMAP hbitmap, /* [in] Handle to bitmap */
 300     LONG count,        /* [in] Number of bytes in bitmap array */
 301     LPCVOID bits)      /* [in] Address of array with bitmap bits */
 302 {
 303     BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 304     LONG height, ret;
 305
 306     if ((!bmp) || (!bits))
 307         return 0;
 308
 309     if (count < 0) {
 310         WARN("(%ld): Negative number of bytes passed???\n", count );
 311         count = -count;
 312     }
 313
 314     /* Only get entire lines */
 315     height = count / bmp->bitmap.bmWidthBytes;
 316     if (height > bmp->bitmap.bmHeight) height = bmp->bitmap.bmHeight;
 317     count = height * bmp->bitmap.bmWidthBytes;
 318
 319     TRACE("(%p, %ld, %p) %dx%d %d colors fetched height: %ld\n",
 320           hbitmap, count, bits, bmp->bitmap.bmWidth, bmp->bitmap.bmHeight,
 321           1 << bmp->bitmap.bmBitsPixel, height );
 322
 323     if(bmp->funcs && bmp->funcs->pSetBitmapBits) {
 324
 325         TRACE("Calling device specific BitmapBits\n");
 326         ret = bmp->funcs->pSetBitmapBits(hbitmap, bits, count);
 327     } else {
 328
 329         if(!bmp->bitmap.bmBits) /* Alloc enough for entire bitmap */
 330             bmp->bitmap.bmBits = HeapAlloc( GetProcessHeap(), 0, count );
 331         if(!bmp->bitmap.bmBits) {
 332             WARN("Unable to allocate bit buffer\n");
 333             ret = 0;
 334         } else {
 335             memcpy(bmp->bitmap.bmBits, bits, count);
 336             ret = count;
 337         }
 338     }
 339
 340     GDI_ReleaseObj( hbitmap );
 341     return ret;
 342 }
 343
 344 /**********************************************************************
 345  *              BITMAP_CopyBitmap
 346  *
 347  */
 348 HBITMAP BITMAP_CopyBitmap(HBITMAP hbitmap)
 349 {
 350     BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 351     HBITMAP res = 0;
 352     BITMAP bm;
 353
 354     if(!bmp) return 0;
 355
 356     bm = bmp->bitmap;
 357     bm.bmBits = NULL;
 358     res = CreateBitmapIndirect(&bm);
 359
 360     if(res) {
 361         char *buf = HeapAlloc( GetProcessHeap(), 0, bm.bmWidthBytes *
 362                                bm.bmHeight );
 363         GetBitmapBits (hbitmap, bm.bmWidthBytes * bm.bmHeight, buf);
 364         SetBitmapBits (res, bm.bmWidthBytes * bm.bmHeight, buf);
 365         HeapFree( GetProcessHeap(), 0, buf );
 366     }
 367
 368     GDI_ReleaseObj( hbitmap );
 369     return res;
 370 }
 371
 372
 373 /***********************************************************************
 374  *           BITMAP_SetOwnerDC
 375  *
 376  * Set the type of DC that owns the bitmap. This is used when the
 377  * bitmap is selected into a device to initialize the bitmap function
 378  * table.
 379  */
 380 BOOL BITMAP_SetOwnerDC( HBITMAP hbitmap, DC *dc )
 381 {
 382     BITMAPOBJ *bitmap;
 383     BOOL ret;
 384
 385     /* never set the owner of the stock bitmap since it can be selected in multiple DCs */
 386     if (hbitmap == GetStockObject(DEFAULT_BITMAP)) return TRUE;
 387
 388     if (!(bitmap = GDI_GetObjPtr( hbitmap, BITMAP_MAGIC ))) return FALSE;
 389
 390     ret = TRUE;
 391     if (!bitmap->funcs)  /* not owned by a DC yet */
 392     {
 393         if (dc->funcs->pCreateBitmap) ret = dc->funcs->pCreateBitmap( dc->physDev, hbitmap );
 394         if (ret) bitmap->funcs = dc->funcs;
 395     }
 396     else if (bitmap->funcs != dc->funcs)
 397     {
 398         FIXME( "Trying to select bitmap %p in different DC type\n", hbitmap );
 399         ret = FALSE;
 400     }
 401     GDI_ReleaseObj( hbitmap );
 402     return ret;
 403 }
 404
 405
 406 /***********************************************************************
 407  *           BITMAP_SelectObject
 408  */
 409 static HGDIOBJ BITMAP_SelectObject( HGDIOBJ handle, void *obj, HDC hdc )
 410 {
 411     HGDIOBJ ret;
 412     BITMAPOBJ *bitmap = obj;
 413     DC *dc = DC_GetDCPtr( hdc );
 414
 415     if (!dc) return 0;
 416     if (GetObjectType( hdc ) != OBJ_MEMDC)
 417     {
 418         GDI_ReleaseObj( hdc );
 419         return 0;
 420     }
 421     ret = dc->hBitmap;
 422     if (handle == dc->hBitmap) goto done;  /* nothing to do */
 423
 424     if (bitmap->header.dwCount && (handle != GetStockObject(DEFAULT_BITMAP)))
 425     {
 426         WARN( "Bitmap already selected in another DC\n" );
 427         GDI_ReleaseObj( hdc );
 428         return 0;
 429     }
 430
 431     if (!bitmap->funcs && !BITMAP_SetOwnerDC( handle, dc ))
 432     {
 433         GDI_ReleaseObj( hdc );
 434         return 0;
 435     }
 436
 437     if (dc->funcs->pSelectBitmap) handle = dc->funcs->pSelectBitmap( dc->physDev, handle );
 438
 439     if (handle)
 440     {
 441         dc->hBitmap = handle;
 442         dc->flags &= ~DC_DIRTY;
 443         SetRectRgn( dc->hVisRgn, 0, 0, bitmap->bitmap.bmWidth, bitmap->bitmap.bmHeight);
 444         DC_InitDC( dc );
 445     }
 446     else ret = 0;
 447
 448  done:
 449     GDI_ReleaseObj( hdc );
 450     return ret;
 451 }
 452
 453
 454 /***********************************************************************
 455  *           BITMAP_DeleteObject
 456  */
 457 static BOOL BITMAP_DeleteObject( HGDIOBJ handle, void *obj )
 458 {
 459     BITMAPOBJ * bmp = obj;
 460
 461     if (bmp->funcs && bmp->funcs->pDeleteBitmap)
 462         bmp->funcs->pDeleteBitmap( handle );
 463
 464     if( bmp->bitmap.bmBits )
 465         HeapFree( GetProcessHeap(), 0, bmp->bitmap.bmBits );
 466
 467     if (bmp->dib)
 468     {
 469         DIBSECTION *dib = bmp->dib;
 470
 471         if (dib->dsBm.bmBits)
 472         {
 473             if (dib->dshSection)
 474             {
 475                 SYSTEM_INFO SystemInfo;
 476                 GetSystemInfo( &SystemInfo );
 477                 UnmapViewOfFile( (char *)dib->dsBm.bmBits -
 478                                  (dib->dsOffset % SystemInfo.dwAllocationGranularity) );
 479             }
 480             else if (!dib->dsOffset)
 481                 VirtualFree(dib->dsBm.bmBits, 0L, MEM_RELEASE );
 482         }
 483         HeapFree(GetProcessHeap(), 0, dib);
 484         bmp->dib = NULL;
 485         if (bmp->segptr_bits)
 486         { /* free its selector array */
 487             WORD sel = SELECTOROF(bmp->segptr_bits);
 488             WORD count = (GetSelectorLimit16(sel) / 0x10000) + 1;
 489             int i;
 490
 491             for (i = 0; i < count; i++) FreeSelector16(sel + (i << __AHSHIFT));
 492         }
 493     }
 494     return GDI_FreeObject( handle, obj );
 495 }
 496
 497
 498 /***********************************************************************
 499  *           BITMAP_GetObject16
 500  */
 501 static INT BITMAP_GetObject16( HGDIOBJ handle, void *obj, INT count, LPVOID buffer )
 502 {
 503     BITMAPOBJ *bmp = obj;
 504
 505     if (bmp->dib)
 506     {
 507         if ( count <= sizeof(BITMAP16) )
 508         {
 509             BITMAP *bmp32 = &bmp->dib->dsBm;
 510             BITMAP16 bmp16;
 511             bmp16.bmType       = bmp32->bmType;
 512             bmp16.bmWidth      = bmp32->bmWidth;
 513             bmp16.bmHeight     = bmp32->bmHeight;
 514             bmp16.bmWidthBytes = bmp32->bmWidthBytes;
 515             bmp16.bmPlanes     = bmp32->bmPlanes;
 516             bmp16.bmBitsPixel  = bmp32->bmBitsPixel;
 517             bmp16.bmBits       = (SEGPTR)0;
 518             memcpy( buffer, &bmp16, count );
 519             return count;
 520         }
 521         else
 522         {
 523             FIXME("not implemented for DIBs: count %d\n", count);
 524             return 0;
 525         }
 526     }
 527     else
 528     {
 529         BITMAP16 bmp16;
 530         bmp16.bmType       = bmp->bitmap.bmType;
 531         bmp16.bmWidth      = bmp->bitmap.bmWidth;
 532         bmp16.bmHeight     = bmp->bitmap.bmHeight;
 533         bmp16.bmWidthBytes = bmp->bitmap.bmWidthBytes;
 534         bmp16.bmPlanes     = bmp->bitmap.bmPlanes;
 535         bmp16.bmBitsPixel  = bmp->bitmap.bmBitsPixel;
 536         bmp16.bmBits       = (SEGPTR)0;
 537         if (count > sizeof(bmp16)) count = sizeof(bmp16);
 538         memcpy( buffer, &bmp16, count );
 539         return count;
 540     }
 541 }
 542
 543
 544 /***********************************************************************
 545  *           BITMAP_GetObject
 546  */
 547 static INT BITMAP_GetObject( HGDIOBJ handle, void *obj, INT count, LPVOID buffer )
 548 {
 549     BITMAPOBJ *bmp = obj;
 550
 551     if (bmp->dib)
 552     {
 553         if( !buffer )
 554             return sizeof(DIBSECTION);
 555         if (count < sizeof(DIBSECTION))
 556         {
 557             if (count > sizeof(BITMAP)) count = sizeof(BITMAP);
 558         }
 559         else
 560         {
 561             if (count > sizeof(DIBSECTION)) count = sizeof(DIBSECTION);
 562         }
 563
 564         memcpy( buffer, bmp->dib, count );
 565         return count;
 566     }
 567     else
 568     {
 569         if( !buffer )
 570             return sizeof(BITMAP);
 571         if (count > sizeof(BITMAP)) count = sizeof(BITMAP);
 572         memcpy( buffer, &bmp->bitmap, count );
 573         return count;
 574     }
 575 }
 576
 577
 578 /******************************************************************************
 579  * CreateDiscardableBitmap [GDI32.@]
 580  *
 581  * Creates a discardable bitmap.
 582  *
 583  * RETURNS
 584  *    Success: Handle to bitmap
 585  *    Failure: NULL
 586  */
 587 HBITMAP WINAPI CreateDiscardableBitmap(
 588     HDC hdc,    /* [in] Handle to device context */
 589     INT width,  /* [in] Bitmap width */
 590     INT height) /* [in] Bitmap height */
 591 {
 592     return CreateCompatibleBitmap( hdc, width, height );
 593 }
 594
 595
 596 /******************************************************************************
 597  * GetBitmapDimensionEx [GDI32.@]
 598  *
 599  * Retrieves dimensions of a bitmap.
 600  *
 601  * RETURNS
 602  *    Success: TRUE
 603  *    Failure: FALSE
 604  */
 605 BOOL WINAPI GetBitmapDimensionEx(
 606     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 607     LPSIZE size)     /* [out] Address of struct receiving dimensions */
 608 {
 609     BITMAPOBJ * bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 610     if (!bmp) return FALSE;
 611     *size = bmp->size;
 612     GDI_ReleaseObj( hbitmap );
 613     return TRUE;
 614 }
 615
 616
 617 /******************************************************************************
 618  * SetBitmapDimensionEx [GDI32.@]
 619  *
 620  * Assigns dimensions to a bitmap.
 621  *
 622  * RETURNS
 623  *    Success: TRUE
 624  *    Failure: FALSE
 625  */
 626 BOOL WINAPI SetBitmapDimensionEx(
 627     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 628     INT x,           /* [in]  Bitmap width */
 629     INT y,           /* [in]  Bitmap height */
 630     LPSIZE prevSize) /* [out] Address of structure for orig dims */
 631 {
 632     BITMAPOBJ * bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 633     if (!bmp) return FALSE;
 634     if (prevSize) *prevSize = bmp->size;
 635     bmp->size.cx = x;
 636     bmp->size.cy = y;
 637     GDI_ReleaseObj( hbitmap );
 638     return TRUE;
 639 }