objects/bitmap.c

   1 /*
   2  * GDI bitmap objects
   3  *
   4  * Copyright 1993 Alexandre Julliard
   5  *           1998 Huw D M Davies
   6  */
   7
   8 #include <stdlib.h>
   9 #include <string.h>
  10
  11 #include "wine/winbase16.h"
  12 #include "gdi.h"
  13 #include "dc.h"
  14 #include "bitmap.h"
  15 #include "heap.h"
  16 #include "global.h"
  17 #include "debugtools.h"
  18 #include "wine/winuser16.h"
  19
  20 DEFAULT_DEBUG_CHANNEL(bitmap);
  21
  22 BITMAP_DRIVER *BITMAP_Driver = NULL;
  23
  24
  25 /***********************************************************************
  26  *           BITMAP_GetWidthBytes
  27  *
  28  * Return number of bytes taken by a scanline of 16-bit aligned Windows DDB
  29  * data.
  30  */
  31 INT BITMAP_GetWidthBytes( INT bmWidth, INT bpp )
  32 {
  33     switch(bpp)
  34     {
  35     case 1:
  36         return 2 * ((bmWidth+15) >> 4);
  37
  38     case 24:
  39         bmWidth *= 3; /* fall through */
  40     case 8:
  41         return bmWidth + (bmWidth & 1);
  42
  43     case 32:
  44         return bmWidth * 4;
  45
  46     case 16:
  47     case 15:
  48         return bmWidth * 2;
  49
  50     case 4:
  51         return 2 * ((bmWidth+3) >> 2);
  52
  53     default:
  54         WARN("Unknown depth %d, please report.\n", bpp );
  55     }
  56     return -1;
  57 }
  58
  59 /***********************************************************************
  60  *           CreateUserBitmap16    (GDI.407)
  61  */
  62 HBITMAP16 WINAPI CreateUserBitmap16( INT16 width, INT16 height, UINT16 planes,
  63                                      UINT16 bpp, LPCVOID bits )
  64 {
  65     return CreateBitmap16( width, height, planes, bpp, bits );
  66 }
  67
  68 /***********************************************************************
  69  *           CreateUserDiscardableBitmap16    (GDI.409)
  70  */
  71 HBITMAP16 WINAPI CreateUserDiscardableBitmap16( WORD dummy,
  72                                                 INT16 width, INT16 height )
  73 {
  74     HDC hdc = CreateDCA( "DISPLAY", NULL, NULL, NULL );
  75     HBITMAP16 ret = CreateCompatibleBitmap16( hdc, width, height );
  76     DeleteDC( hdc );
  77     return ret;
  78 }
  79
  80
  81 /***********************************************************************
  82  *           CreateBitmap16    (GDI.48)
  83  */
  84 HBITMAP16 WINAPI CreateBitmap16( INT16 width, INT16 height, UINT16 planes,
  85                                  UINT16 bpp, LPCVOID bits )
  86 {
  87     return CreateBitmap( width, height, planes, bpp, bits );
  88 }
  89
  90
  91 /******************************************************************************
  92  * CreateBitmap [GDI32.25]  Creates a bitmap with the specified info
  93  *
  94  * PARAMS
  95  *    width  [I] bitmap width
  96  *    height [I] bitmap height
  97  *    planes [I] Number of color planes
  98  *    bpp    [I] Number of bits to identify a color
  99  *    bits   [I] Pointer to array containing color data
 100  *
 101  * RETURNS
 102  *    Success: Handle to bitmap
 103  *    Failure: 0
 104  */
 105 HBITMAP WINAPI CreateBitmap( INT width, INT height, UINT planes,
 106                                  UINT bpp, LPCVOID bits )
 107 {
 108     BITMAPOBJ *bmp;
 109     HBITMAP hbitmap;
 110
 111     planes = (BYTE)planes;
 112     bpp    = (BYTE)bpp;
 113
 114
 115       /* Check parameters */
 116     if (!height || !width) return 0;
 117     if (planes != 1) {
 118         FIXME("planes = %d\n", planes);
 119         return 0;
 120     }
 121     if (height < 0) height = -height;
 122     if (width < 0) width = -width;
 123
 124       /* Create the BITMAPOBJ */
 125     hbitmap = GDI_AllocObject( sizeof(BITMAPOBJ), BITMAP_MAGIC );
 126     if (!hbitmap) return 0;
 127
 128     TRACE("%dx%d, %d colors returning %08x\n", width, height,
 129           1 << (planes*bpp), hbitmap);
 130
 131     bmp = (BITMAPOBJ *) GDI_HEAP_LOCK( hbitmap );
 132
 133     bmp->size.cx = 0;
 134     bmp->size.cy = 0;
 135     bmp->bitmap.bmType = 0;
 136     bmp->bitmap.bmWidth = width;
 137     bmp->bitmap.bmHeight = height;
 138     bmp->bitmap.bmPlanes = planes;
 139     bmp->bitmap.bmBitsPixel = bpp;
 140     bmp->bitmap.bmWidthBytes = BITMAP_GetWidthBytes( width, bpp );
 141     bmp->bitmap.bmBits = NULL;
 142
 143     bmp->funcs = NULL;
 144     bmp->physBitmap = NULL;
 145     bmp->dib = NULL;
 146
 147     if (bits) /* Set bitmap bits */
 148         SetBitmapBits( hbitmap, height * bmp->bitmap.bmWidthBytes,
 149                          bits );
 150     GDI_HEAP_UNLOCK( hbitmap );
 151     return hbitmap;
 152 }
 153
 154
 155 /***********************************************************************
 156  *           CreateCompatibleBitmap16    (GDI.51)
 157  */
 158 HBITMAP16 WINAPI CreateCompatibleBitmap16(HDC16 hdc, INT16 width, INT16 height)
 159 {
 160     return CreateCompatibleBitmap( hdc, width, height );
 161 }
 162
 163
 164 /******************************************************************************
 165  * CreateCompatibleBitmap [GDI32.30]  Creates a bitmap compatible with the DC
 166  *
 167  * PARAMS
 168  *    hdc    [I] Handle to device context
 169  *    width  [I] Width of bitmap
 170  *    height [I] Height of bitmap
 171  *
 172  * RETURNS
 173  *    Success: Handle to bitmap
 174  *    Failure: 0
 175  */
 176 HBITMAP WINAPI CreateCompatibleBitmap( HDC hdc, INT width, INT height)
 177 {
 178     HBITMAP hbmpRet = 0;
 179     DC *dc;
 180
 181     TRACE("(%04x,%d,%d) = \n", hdc, width, height );
 182     if (!(dc = DC_GetDCPtr( hdc ))) return 0;
 183     if ((width >= 0x10000) || (height >= 0x10000)) {
 184         FIXME("got bad width %d or height %d, please look for reason\n",
 185               width, height );
 186     } else {
 187         /* MS doc says if width or height is 0, return 1-by-1 pixel, monochrome bitmap */
 188         if (!width || !height)
 189            hbmpRet = CreateBitmap( 1, 1, 1, 1, NULL );
 190         else
 191            hbmpRet = CreateBitmap( width, height, 1, dc->w.bitsPerPixel, NULL );
 192         if(dc->funcs->pCreateBitmap)
 193             dc->funcs->pCreateBitmap( hbmpRet );
 194     }
 195     TRACE("\t\t%04x\n", hbmpRet);
 196     GDI_HEAP_UNLOCK(hdc);
 197     return hbmpRet;
 198 }
 199
 200
 201 /***********************************************************************
 202  *           CreateBitmapIndirect16    (GDI.49)
 203  */
 204 HBITMAP16 WINAPI CreateBitmapIndirect16( const BITMAP16 * bmp )
 205 {
 206     return CreateBitmap16( bmp->bmWidth, bmp->bmHeight, bmp->bmPlanes,
 207                            bmp->bmBitsPixel, PTR_SEG_TO_LIN( bmp->bmBits ) );
 208 }
 209
 210
 211 /******************************************************************************
 212  * CreateBitmapIndirect [GDI32.26]  Creates a bitmap with the specifies info
 213  *
 214  * RETURNS
 215  *    Success: Handle to bitmap
 216  *    Failure: NULL
 217  */
 218 HBITMAP WINAPI CreateBitmapIndirect(
 219     const BITMAP * bmp) /* [in] Pointer to the bitmap data */
 220 {
 221     return CreateBitmap( bmp->bmWidth, bmp->bmHeight, bmp->bmPlanes,
 222                            bmp->bmBitsPixel, bmp->bmBits );
 223 }
 224
 225
 226 /***********************************************************************
 227  *           GetBitmapBits16    (GDI.74)
 228  */
 229 LONG WINAPI GetBitmapBits16( HBITMAP16 hbitmap, LONG count, LPVOID buffer )
 230 {
 231     return GetBitmapBits( hbitmap, count, buffer );
 232 }
 233
 234
 235 /***********************************************************************
 236  * GetBitmapBits [GDI32.143]  Copies bitmap bits of bitmap to buffer
 237  *
 238  * RETURNS
 239  *    Success: Number of bytes copied
 240  *    Failure: 0
 241  */
 242 LONG WINAPI GetBitmapBits(
 243     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 244     LONG count,        /* [in]  Number of bytes to copy */
 245     LPVOID bits)       /* [out] Pointer to buffer to receive bits */
 246 {
 247     BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 248     LONG height, ret;
 249
 250     if (!bmp) return 0;
 251
 252     /* If the bits vector is null, the function should return the read size */
 253     if(bits == NULL)
 254         return bmp->bitmap.bmWidthBytes * bmp->bitmap.bmHeight;
 255
 256     if (count < 0) {
 257         WARN("(%ld): Negative number of bytes passed???\n", count );
 258         count = -count;
 259     }
 260
 261     /* Only get entire lines */
 262     height = count / bmp->bitmap.bmWidthBytes;
 263     if (height > bmp->bitmap.bmHeight) height = bmp->bitmap.bmHeight;
 264     count = height * bmp->bitmap.bmWidthBytes;
 265     if (count == 0)
 266       {
 267         WARN("Less then one entire line requested\n");
 268         GDI_HEAP_UNLOCK( hbitmap );
 269         return 0;
 270       }
 271
 272
 273     TRACE("(%08x, %ld, %p) %dx%d %d colors fetched height: %ld\n",
 274           hbitmap, count, bits, bmp->bitmap.bmWidth, bmp->bitmap.bmHeight,
 275           1 << bmp->bitmap.bmBitsPixel, height );
 276
 277     if(bmp->funcs) {
 278
 279         TRACE("Calling device specific BitmapBits\n");
 280         if(bmp->funcs->pBitmapBits)
 281             ret = bmp->funcs->pBitmapBits(hbitmap, bits, count, DDB_GET);
 282         else {
 283             ERR("BitmapBits == NULL??\n");
 284             ret = 0;
 285         }
 286
 287     } else {
 288
 289         if(!bmp->bitmap.bmBits) {
 290             WARN("Bitmap is empty\n");
 291             ret = 0;
 292         } else {
 293             memcpy(bits, bmp->bitmap.bmBits, count);
 294             ret = count;
 295         }
 296
 297     }
 298
 299     GDI_HEAP_UNLOCK( hbitmap );
 300     return ret;
 301 }
 302
 303
 304 /***********************************************************************
 305  *           SetBitmapBits16    (GDI.106)
 306  */
 307 LONG WINAPI SetBitmapBits16( HBITMAP16 hbitmap, LONG count, LPCVOID buffer )
 308 {
 309     return SetBitmapBits( hbitmap, count, buffer );
 310 }
 311
 312
 313 /******************************************************************************
 314  * SetBitmapBits [GDI32.303]  Sets bits of color data for a bitmap
 315  *
 316  * RETURNS
 317  *    Success: Number of bytes used in setting the bitmap bits
 318  *    Failure: 0
 319  */
 320 LONG WINAPI SetBitmapBits(
 321     HBITMAP hbitmap, /* [in] Handle to bitmap */
 322     LONG count,        /* [in] Number of bytes in bitmap array */
 323     LPCVOID bits)      /* [in] Address of array with bitmap bits */
 324 {
 325     BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 326     LONG height, ret;
 327
 328     if ((!bmp) || (!bits))
 329         return 0;
 330
 331     if (count < 0) {
 332         WARN("(%ld): Negative number of bytes passed???\n", count );
 333         count = -count;
 334     }
 335
 336     /* Only get entire lines */
 337     height = count / bmp->bitmap.bmWidthBytes;
 338     if (height > bmp->bitmap.bmHeight) height = bmp->bitmap.bmHeight;
 339     count = height * bmp->bitmap.bmWidthBytes;
 340
 341     TRACE("(%08x, %ld, %p) %dx%d %d colors fetched height: %ld\n",
 342           hbitmap, count, bits, bmp->bitmap.bmWidth, bmp->bitmap.bmHeight,
 343           1 << bmp->bitmap.bmBitsPixel, height );
 344
 345     if(bmp->funcs) {
 346
 347         TRACE("Calling device specific BitmapBits\n");
 348         if(bmp->funcs->pBitmapBits)
 349             ret = bmp->funcs->pBitmapBits(hbitmap, (void *) bits, count, DDB_SET);
 350         else {
 351             ERR("BitmapBits == NULL??\n");
 352             ret = 0;
 353         }
 354
 355     } else {
 356
 357         if(!bmp->bitmap.bmBits) /* Alloc enough for entire bitmap */
 358             bmp->bitmap.bmBits = HeapAlloc( GetProcessHeap(), 0, count );
 359         if(!bmp->bitmap.bmBits) {
 360             WARN("Unable to allocate bit buffer\n");
 361             ret = 0;
 362         } else {
 363             memcpy(bmp->bitmap.bmBits, bits, count);
 364             ret = count;
 365         }
 366     }
 367
 368     GDI_HEAP_UNLOCK( hbitmap );
 369     return ret;
 370 }
 371
 372 /**********************************************************************
 373  *              BITMAP_CopyBitmap
 374  *
 375  */
 376 HBITMAP BITMAP_CopyBitmap(HBITMAP hbitmap)
 377 {
 378     BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 379     HBITMAP res = 0;
 380     BITMAP bm;
 381
 382     if(!bmp) return 0;
 383
 384     bm = bmp->bitmap;
 385     bm.bmBits = NULL;
 386     res = CreateBitmapIndirect(&bm);
 387
 388     if(res) {
 389         char *buf = HeapAlloc( GetProcessHeap(), 0, bm.bmWidthBytes *
 390                                bm.bmHeight );
 391         GetBitmapBits (hbitmap, bm.bmWidthBytes * bm.bmHeight, buf);
 392         SetBitmapBits (res, bm.bmWidthBytes * bm.bmHeight, buf);
 393         HeapFree( GetProcessHeap(), 0, buf );
 394     }
 395
 396     GDI_HEAP_UNLOCK( hbitmap );
 397     return res;
 398 }
 399
 400 /***********************************************************************
 401  *           BITMAP_DeleteObject
 402  */
 403 BOOL BITMAP_DeleteObject( HBITMAP16 hbitmap, BITMAPOBJ * bmp )
 404 {
 405     if (bmp->funcs && bmp->funcs->pDeleteObject)
 406         bmp->funcs->pDeleteObject( hbitmap );
 407
 408     if( bmp->bitmap.bmBits )
 409         HeapFree( GetProcessHeap(), 0, bmp->bitmap.bmBits );
 410
 411     DIB_DeleteDIBSection( bmp );
 412
 413     return GDI_FreeObject( hbitmap );
 414 }
 415
 416
 417 /***********************************************************************
 418  *           BITMAP_GetObject16
 419  */
 420 INT16 BITMAP_GetObject16( BITMAPOBJ * bmp, INT16 count, LPVOID buffer )
 421 {
 422     if (bmp->dib)
 423     {
 424         if ( count <= sizeof(BITMAP16) )
 425         {
 426             BITMAP *bmp32 = &bmp->dib->dsBm;
 427             BITMAP16 bmp16;
 428             bmp16.bmType       = bmp32->bmType;
 429             bmp16.bmWidth      = bmp32->bmWidth;
 430             bmp16.bmHeight     = bmp32->bmHeight;
 431             bmp16.bmWidthBytes = bmp32->bmWidthBytes;
 432             bmp16.bmPlanes     = bmp32->bmPlanes;
 433             bmp16.bmBitsPixel  = bmp32->bmBitsPixel;
 434             bmp16.bmBits       = (SEGPTR)0;
 435             memcpy( buffer, &bmp16, count );
 436             return count;
 437         }
 438         else
 439         {
 440             FIXME("not implemented for DIBs: count %d\n", count);
 441             return 0;
 442         }
 443     }
 444     else
 445     {
 446         BITMAP16 bmp16;
 447         bmp16.bmType       = bmp->bitmap.bmType;
 448         bmp16.bmWidth      = bmp->bitmap.bmWidth;
 449         bmp16.bmHeight     = bmp->bitmap.bmHeight;
 450         bmp16.bmWidthBytes = bmp->bitmap.bmWidthBytes;
 451         bmp16.bmPlanes     = bmp->bitmap.bmPlanes;
 452         bmp16.bmBitsPixel  = bmp->bitmap.bmBitsPixel;
 453         bmp16.bmBits       = (SEGPTR)0;
 454         if (count > sizeof(bmp16)) count = sizeof(bmp16);
 455         memcpy( buffer, &bmp16, count );
 456         return count;
 457     }
 458 }
 459
 460
 461 /***********************************************************************
 462  *           BITMAP_GetObject
 463  */
 464 INT BITMAP_GetObject( BITMAPOBJ * bmp, INT count, LPVOID buffer )
 465 {
 466     if (bmp->dib)
 467     {
 468         if (count < sizeof(DIBSECTION))
 469         {
 470             if (count > sizeof(BITMAP)) count = sizeof(BITMAP);
 471         }
 472         else
 473         {
 474             if (count > sizeof(DIBSECTION)) count = sizeof(DIBSECTION);
 475         }
 476
 477         memcpy( buffer, bmp->dib, count );
 478         return count;
 479     }
 480     else
 481     {
 482         if (count > sizeof(BITMAP)) count = sizeof(BITMAP);
 483         memcpy( buffer, &bmp->bitmap, count );
 484         return count;
 485     }
 486 }
 487
 488
 489 /***********************************************************************
 490  *           CreateDiscardableBitmap16    (GDI.156)
 491  */
 492 HBITMAP16 WINAPI CreateDiscardableBitmap16( HDC16 hdc, INT16 width,
 493                                             INT16 height )
 494 {
 495     return CreateCompatibleBitmap16( hdc, width, height );
 496 }
 497
 498
 499 /******************************************************************************
 500  * CreateDiscardableBitmap [GDI32.38]  Creates a discardable bitmap
 501  *
 502  * RETURNS
 503  *    Success: Handle to bitmap
 504  *    Failure: NULL
 505  */
 506 HBITMAP WINAPI CreateDiscardableBitmap(
 507     HDC hdc,    /* [in] Handle to device context */
 508     INT width,  /* [in] Bitmap width */
 509     INT height) /* [in] Bitmap height */
 510 {
 511     return CreateCompatibleBitmap( hdc, width, height );
 512 }
 513
 514
 515 /***********************************************************************
 516  *           GetBitmapDimensionEx16    (GDI.468)
 517  *
 518  * NOTES
 519  *    Can this call GetBitmapDimensionEx?
 520  */
 521 BOOL16 WINAPI GetBitmapDimensionEx16( HBITMAP16 hbitmap, LPSIZE16 size )
 522 {
 523     BITMAPOBJ * bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 524     if (!bmp) return FALSE;
 525     CONV_SIZE32TO16( &bmp->size, size );
 526     GDI_HEAP_UNLOCK( hbitmap );
 527     return TRUE;
 528 }
 529
 530
 531 /******************************************************************************
 532  * GetBitmapDimensionEx [GDI32.144]  Retrieves dimensions of a bitmap
 533  *
 534  * RETURNS
 535  *    Success: TRUE
 536  *    Failure: FALSE
 537  */
 538 BOOL WINAPI GetBitmapDimensionEx(
 539     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 540     LPSIZE size)     /* [out] Address of struct receiving dimensions */
 541 {
 542     BITMAPOBJ * bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 543     if (!bmp) return FALSE;
 544     *size = bmp->size;
 545     GDI_HEAP_UNLOCK( hbitmap );
 546     return TRUE;
 547 }
 548
 549
 550 /***********************************************************************
 551  *           GetBitmapDimension    (GDI.162)
 552  */
 553 DWORD WINAPI GetBitmapDimension16( HBITMAP16 hbitmap )
 554 {
 555     SIZE16 size;
 556     if (!GetBitmapDimensionEx16( hbitmap, &size )) return 0;
 557     return MAKELONG( size.cx, size.cy );
 558 }
 559
 560
 561 /***********************************************************************
 562  *           SetBitmapDimensionEx16    (GDI.478)
 563  */
 564 BOOL16 WINAPI SetBitmapDimensionEx16( HBITMAP16 hbitmap, INT16 x, INT16 y,
 565                                       LPSIZE16 prevSize )
 566 {
 567     BITMAPOBJ * bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 568     if (!bmp) return FALSE;
 569     if (prevSize) CONV_SIZE32TO16( &bmp->size, prevSize );
 570     bmp->size.cx = x;
 571     bmp->size.cy = y;
 572     GDI_HEAP_UNLOCK( hbitmap );
 573     return TRUE;
 574 }
 575
 576
 577 /******************************************************************************
 578  * SetBitmapDimensionEx [GDI32.304]  Assignes dimensions to a bitmap
 579  *
 580  * RETURNS
 581  *    Success: TRUE
 582  *    Failure: FALSE
 583  */
 584 BOOL WINAPI SetBitmapDimensionEx(
 585     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 586     INT x,           /* [in]  Bitmap width */
 587     INT y,           /* [in]  Bitmap height */
 588     LPSIZE prevSize) /* [out] Address of structure for orig dims */
 589 {
 590     BITMAPOBJ * bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 591     if (!bmp) return FALSE;
 592     if (prevSize) *prevSize = bmp->size;
 593     bmp->size.cx = x;
 594     bmp->size.cy = y;
 595     GDI_HEAP_UNLOCK( hbitmap );
 596     return TRUE;
 597 }
 598
 599
 600 /***********************************************************************
 601  *           SetBitmapDimension    (GDI.163)
 602  */
 603 DWORD WINAPI SetBitmapDimension16( HBITMAP16 hbitmap, INT16 x, INT16 y )
 604 {
 605     SIZE16 size;
 606     if (!SetBitmapDimensionEx16( hbitmap, x, y, &size )) return 0;
 607     return MAKELONG( size.cx, size.cy );
 608 }
 609