objects/palette.c

   1 /*
   2  * GDI palette objects
   3  *
   4  * Copyright 1993,1994 Alexandre Julliard
   5  * Copyright 1996 Alex Korobka
   6  *
   7  * PALETTEOBJ is documented in the Dr. Dobbs Journal May 1993.
   8  * Information in the "Undocumented Windows" is incorrect.
   9  */
  10
  11 #include <stdlib.h>
  12 #include <string.h>
  13
  14 #include "winbase.h"
  15 #include "windef.h"
  16 #include "wingdi.h"
  17 #include "wine/winuser16.h"
  18 #include "gdi.h"
  19 #include "color.h"
  20 #include "palette.h"
  21 #include "debugtools.h"
  22 #include "winerror.h"
  23
  24 DEFAULT_DEBUG_CHANNEL(palette);
  25
  26 PALETTE_DRIVER *PALETTE_Driver = NULL;
  27
  28 /* Pointers to USER implementation of SelectPalette/RealizePalette */
  29 /* they will be patched by USER on startup */
  30 FARPROC pfnSelectPalette = NULL;
  31 FARPROC pfnRealizePalette = NULL;
  32
  33 static UINT SystemPaletteUse = SYSPAL_STATIC;  /* currently not considered */
  34
  35 static HPALETTE16 hPrimaryPalette = 0; /* used for WM_PALETTECHANGED */
  36 static HPALETTE16 hLastRealizedPalette = 0; /* UnrealizeObject() needs it */
  37
  38
  39 /***********************************************************************
  40  *           PALETTE_Init
  41  *
  42  * Create the system palette.
  43  */
  44 HPALETTE16 PALETTE_Init(void)
  45 {
  46     int                 i;
  47     HPALETTE16          hpalette;
  48     LOGPALETTE *        palPtr;
  49     PALETTEOBJ*         palObj;
  50     const PALETTEENTRY* __sysPalTemplate = COLOR_GetSystemPaletteTemplate();
  51
  52     /* create default palette (20 system colors) */
  53
  54     palPtr = HeapAlloc( GetProcessHeap(), 0,
  55              sizeof(LOGPALETTE) + (NB_RESERVED_COLORS-1)*sizeof(PALETTEENTRY));
  56     if (!palPtr) return FALSE;
  57
  58     palPtr->palVersion = 0x300;
  59     palPtr->palNumEntries = NB_RESERVED_COLORS;
  60     for( i = 0; i < NB_RESERVED_COLORS; i ++ )
  61     {
  62         palPtr->palPalEntry[i].peRed = __sysPalTemplate[i].peRed;
  63         palPtr->palPalEntry[i].peGreen = __sysPalTemplate[i].peGreen;
  64         palPtr->palPalEntry[i].peBlue = __sysPalTemplate[i].peBlue;
  65         palPtr->palPalEntry[i].peFlags = 0;
  66     }
  67     hpalette = CreatePalette16( palPtr );
  68     HeapFree( GetProcessHeap(), 0, palPtr );
  69
  70     palObj = (PALETTEOBJ*) GDI_GetObjPtr( hpalette, PALETTE_MAGIC );
  71     if (palObj)
  72     {
  73         if (!(palObj->mapping = HeapAlloc( GetProcessHeap(), 0, sizeof(int) * 20 )))
  74             ERR("Can not create palette mapping -- out of memory!\n");
  75         GDI_ReleaseObj( hpalette );
  76     }
  77     return hpalette;
  78 }
  79
  80 /***********************************************************************
  81  *           PALETTE_ValidateFlags
  82  */
  83 void PALETTE_ValidateFlags(PALETTEENTRY* lpPalE, int size)
  84 {
  85     int i = 0;
  86     for( ; i<size ; i++ )
  87         lpPalE[i].peFlags = PC_SYS_USED | (lpPalE[i].peFlags & 0x07);
  88 }
  89
  90
  91 /***********************************************************************
  92  *           CreatePalette    (GDI.360)
  93  */
  94 HPALETTE16 WINAPI CreatePalette16( const LOGPALETTE* palette )
  95 {
  96     return CreatePalette( palette );
  97 }
  98
  99
 100 /***********************************************************************
 101  * CreatePalette [GDI32.@]  Creates a logical color palette
 102  *
 103  * RETURNS
 104  *    Success: Handle to logical palette
 105  *    Failure: NULL
 106  */
 107 HPALETTE WINAPI CreatePalette(
 108     const LOGPALETTE* palette) /* [in] Pointer to logical color palette */
 109 {
 110     PALETTEOBJ * palettePtr;
 111     HPALETTE hpalette;
 112     int size;
 113
 114     if (!palette) return 0;
 115     TRACE("entries=%i\n", palette->palNumEntries);
 116
 117     size = sizeof(LOGPALETTE) + (palette->palNumEntries - 1) * sizeof(PALETTEENTRY);
 118
 119     if (!(palettePtr = GDI_AllocObject( size + sizeof(int*) +sizeof(GDIOBJHDR),
 120                                         PALETTE_MAGIC, &hpalette ))) return 0;
 121     memcpy( &palettePtr->logpalette, palette, size );
 122     PALETTE_ValidateFlags(palettePtr->logpalette.palPalEntry,
 123                           palettePtr->logpalette.palNumEntries);
 124     palettePtr->mapping = NULL;
 125     GDI_ReleaseObj( hpalette );
 126
 127     TRACE("   returning %04x\n", hpalette);
 128     return hpalette;
 129 }
 130
 131
 132 /***********************************************************************
 133  * CreateHalftonePalette [GDI.529]  Creates a halftone palette
 134  *
 135  * RETURNS
 136  *    Success: Handle to logical halftone palette
 137  *    Failure: 0
 138  */
 139 HPALETTE16 WINAPI CreateHalftonePalette16(
 140     HDC16 hdc) /* [in] Handle to device context */
 141 {
 142     return CreateHalftonePalette(hdc);
 143 }
 144
 145
 146 /***********************************************************************
 147  * CreateHalftonePalette [GDI32.@]  Creates a halftone palette
 148  *
 149  * RETURNS
 150  *    Success: Handle to logical halftone palette
 151  *    Failure: 0
 152  *
 153  * FIXME: not truly tested
 154  */
 155 HPALETTE WINAPI CreateHalftonePalette(
 156     HDC hdc) /* [in] Handle to device context */
 157 {
 158     int i, r, g, b;
 159     struct {
 160         WORD Version;
 161         WORD NumberOfEntries;
 162         PALETTEENTRY aEntries[256];
 163     } Palette;
 164
 165     Palette.Version = 0x300;
 166     Palette.NumberOfEntries = 256;
 167     GetSystemPaletteEntries(hdc, 0, 256, Palette.aEntries);
 168
 169     for (r = 0; r < 6; r++) {
 170         for (g = 0; g < 6; g++) {
 171             for (b = 0; b < 6; b++) {
 172                 i = r + g*6 + b*36 + 10;
 173                 Palette.aEntries[i].peRed = r * 51;
 174                 Palette.aEntries[i].peGreen = g * 51;
 175                 Palette.aEntries[i].peBlue = b * 51;
 176             }
 177           }
 178         }
 179
 180     for (i = 216; i < 246; i++) {
 181         int v = (i - 216) * 8;
 182         Palette.aEntries[i].peRed = v;
 183         Palette.aEntries[i].peGreen = v;
 184         Palette.aEntries[i].peBlue = v;
 185         }
 186
 187     return CreatePalette((LOGPALETTE *)&Palette);
 188 }
 189
 190
 191 /***********************************************************************
 192  *           GetPaletteEntries    (GDI.363)
 193  */
 194 UINT16 WINAPI GetPaletteEntries16( HPALETTE16 hpalette, UINT16 start,
 195                                    UINT16 count, LPPALETTEENTRY entries )
 196 {
 197     return GetPaletteEntries( hpalette, start, count, entries );
 198 }
 199
 200
 201 /***********************************************************************
 202  * GetPaletteEntries [GDI32.@]  Retrieves palette entries
 203  *
 204  * RETURNS
 205  *    Success: Number of entries from logical palette
 206  *    Failure: 0
 207  */
 208 UINT WINAPI GetPaletteEntries(
 209     HPALETTE hpalette,    /* [in]  Handle of logical palette */
 210     UINT start,           /* [in]  First entry to receive */
 211     UINT count,           /* [in]  Number of entries to receive */
 212     LPPALETTEENTRY entries) /* [out] Address of array receiving entries */
 213 {
 214     PALETTEOBJ * palPtr;
 215     UINT numEntries;
 216
 217     TRACE("hpal = %04x, count=%i\n", hpalette, count );
 218
 219     palPtr = (PALETTEOBJ *) GDI_GetObjPtr( hpalette, PALETTE_MAGIC );
 220     if (!palPtr) return 0;
 221
 222     numEntries = palPtr->logpalette.palNumEntries;
 223     if (start+count > numEntries) count = numEntries - start;
 224     if (entries)
 225     {
 226       if (start >= numEntries)
 227       {
 228         GDI_ReleaseObj( hpalette );
 229         return 0;
 230       }
 231       memcpy( entries, &palPtr->logpalette.palPalEntry[start],
 232               count * sizeof(PALETTEENTRY) );
 233       for( numEntries = 0; numEntries < count ; numEntries++ )
 234            if (entries[numEntries].peFlags & 0xF0)
 235                entries[numEntries].peFlags = 0;
 236     }
 237
 238     GDI_ReleaseObj( hpalette );
 239     return count;
 240 }
 241
 242
 243 /***********************************************************************
 244  *           SetPaletteEntries    (GDI.364)
 245  */
 246 UINT16 WINAPI SetPaletteEntries16( HPALETTE16 hpalette, UINT16 start,
 247                                    UINT16 count, LPPALETTEENTRY entries )
 248 {
 249     return SetPaletteEntries( hpalette, start, count, entries );
 250 }
 251
 252
 253 /***********************************************************************
 254  * SetPaletteEntries [GDI32.@]  Sets color values for range in palette
 255  *
 256  * RETURNS
 257  *    Success: Number of entries that were set
 258  *    Failure: 0
 259  */
 260 UINT WINAPI SetPaletteEntries(
 261     HPALETTE hpalette,    /* [in] Handle of logical palette */
 262     UINT start,           /* [in] Index of first entry to set */
 263     UINT count,           /* [in] Number of entries to set */
 264     LPPALETTEENTRY entries) /* [in] Address of array of structures */
 265 {
 266     PALETTEOBJ * palPtr;
 267     UINT numEntries;
 268
 269     TRACE("hpal=%04x,start=%i,count=%i\n",hpalette,start,count );
 270
 271     palPtr = (PALETTEOBJ *) GDI_GetObjPtr( hpalette, PALETTE_MAGIC );
 272     if (!palPtr) return 0;
 273
 274     numEntries = palPtr->logpalette.palNumEntries;
 275     if (start >= numEntries)
 276     {
 277       GDI_ReleaseObj( hpalette );
 278       return 0;
 279     }
 280     if (start+count > numEntries) count = numEntries - start;
 281     memcpy( &palPtr->logpalette.palPalEntry[start], entries,
 282             count * sizeof(PALETTEENTRY) );
 283     PALETTE_ValidateFlags(palPtr->logpalette.palPalEntry,
 284                           palPtr->logpalette.palNumEntries);
 285     HeapFree( GetProcessHeap(), 0, palPtr->mapping );
 286     palPtr->mapping = NULL;
 287     GDI_ReleaseObj( hpalette );
 288     return count;
 289 }
 290
 291
 292 /***********************************************************************
 293  *           ResizePalette   (GDI.368)
 294  */
 295 BOOL16 WINAPI ResizePalette16( HPALETTE16 hPal, UINT16 cEntries )
 296 {
 297     return ResizePalette( hPal, cEntries );
 298 }
 299
 300
 301 /***********************************************************************
 302  * ResizePalette [GDI32.@]  Resizes logical palette
 303  *
 304  * RETURNS
 305  *    Success: TRUE
 306  *    Failure: FALSE
 307  */
 308 BOOL WINAPI ResizePalette(
 309     HPALETTE hPal, /* [in] Handle of logical palette */
 310     UINT cEntries) /* [in] Number of entries in logical palette */
 311 {
 312     PALETTEOBJ * palPtr = (PALETTEOBJ *) GDI_GetObjPtr( hPal, PALETTE_MAGIC );
 313     UINT         cPrevEnt, prevVer;
 314     int          prevsize, size = sizeof(LOGPALETTE) + (cEntries - 1) * sizeof(PALETTEENTRY);
 315     int*         mapping = NULL;
 316
 317     TRACE("hpal = %04x, prev = %i, new = %i\n",
 318                     hPal, palPtr ? palPtr->logpalette.palNumEntries : -1,
 319                     cEntries );
 320     if( !palPtr ) return FALSE;
 321     cPrevEnt = palPtr->logpalette.palNumEntries;
 322     prevVer = palPtr->logpalette.palVersion;
 323     prevsize = sizeof(LOGPALETTE) + (cPrevEnt - 1) * sizeof(PALETTEENTRY) +
 324                                         sizeof(int*) + sizeof(GDIOBJHDR);
 325     size += sizeof(int*) + sizeof(GDIOBJHDR);
 326     mapping = palPtr->mapping;
 327
 328     if (!(palPtr = GDI_ReallocObject( size, hPal, palPtr ))) return FALSE;
 329
 330     if( mapping )
 331     {
 332         int *newMap = (int*) HeapReAlloc(GetProcessHeap(), 0,
 333                                     mapping, cEntries * sizeof(int) );
 334         if(newMap == NULL)
 335         {
 336             ERR("Can not resize mapping -- out of memory!\n");
 337             GDI_ReleaseObj( hPal );
 338             return FALSE;
 339         }
 340         palPtr->mapping = newMap;
 341     }
 342
 343     if( cEntries > cPrevEnt )
 344     {
 345         if( mapping )
 346             memset(palPtr->mapping + cPrevEnt, 0, (cEntries - cPrevEnt)*sizeof(int));
 347         memset( (BYTE*)palPtr + prevsize, 0, size - prevsize );
 348         PALETTE_ValidateFlags((PALETTEENTRY*)((BYTE*)palPtr + prevsize),
 349                                                      cEntries - cPrevEnt );
 350     }
 351     palPtr->logpalette.palNumEntries = cEntries;
 352     palPtr->logpalette.palVersion = prevVer;
 353     GDI_ReleaseObj( hPal );
 354     return TRUE;
 355 }
 356
 357
 358 /***********************************************************************
 359  *           AnimatePalette   (GDI.367)
 360  */
 361 void WINAPI AnimatePalette16( HPALETTE16 hPal, UINT16 StartIndex,
 362                               UINT16 NumEntries, const PALETTEENTRY* PaletteColors)
 363 {
 364     AnimatePalette( hPal, StartIndex, NumEntries, PaletteColors );
 365 }
 366
 367
 368 /***********************************************************************
 369  * AnimatePalette [GDI32.@]  Replaces entries in logical palette
 370  *
 371  * RETURNS
 372  *    Success: TRUE
 373  *    Failure: FALSE
 374  *
 375  * FIXME
 376  *    Should use existing mapping when animating a primary palette
 377  */
 378 BOOL WINAPI AnimatePalette(
 379     HPALETTE hPal,              /* [in] Handle to logical palette */
 380     UINT StartIndex,            /* [in] First entry in palette */
 381     UINT NumEntries,            /* [in] Count of entries in palette */
 382     const PALETTEENTRY* PaletteColors) /* [in] Pointer to first replacement */
 383 {
 384     TRACE("%04x (%i - %i)\n", hPal, StartIndex,StartIndex+NumEntries);
 385
 386     if( hPal != GetStockObject(DEFAULT_PALETTE) )
 387     {
 388         PALETTEOBJ* palPtr = (PALETTEOBJ *)GDI_GetObjPtr(hPal, PALETTE_MAGIC);
 389         if (!palPtr) return FALSE;
 390
 391         if( (StartIndex + NumEntries) <= palPtr->logpalette.palNumEntries )
 392         {
 393             UINT u;
 394             for( u = 0; u < NumEntries; u++ )
 395                 palPtr->logpalette.palPalEntry[u + StartIndex] = PaletteColors[u];
 396             PALETTE_Driver->
 397               pSetMapping(palPtr, StartIndex, NumEntries,
 398                           hPal != hPrimaryPalette );
 399             GDI_ReleaseObj( hPal );
 400             return TRUE;
 401         }
 402         GDI_ReleaseObj( hPal );
 403     }
 404     return FALSE;
 405 }
 406
 407
 408 /***********************************************************************
 409  *           SetSystemPaletteUse   (GDI.373)
 410  */
 411 UINT16 WINAPI SetSystemPaletteUse16( HDC16 hdc, UINT16 use )
 412 {
 413     return SetSystemPaletteUse( hdc, use );
 414 }
 415
 416
 417 /***********************************************************************
 418  * SetSystemPaletteUse [GDI32.@]
 419  *
 420  * RETURNS
 421  *    Success: Previous system palette
 422  *    Failure: SYSPAL_ERROR
 423  */
 424 UINT WINAPI SetSystemPaletteUse(
 425     HDC hdc,  /* [in] Handle of device context */
 426     UINT use) /* [in] Palette-usage flag */
 427 {
 428     UINT old = SystemPaletteUse;
 429     FIXME("(%04x,%04x): stub\n", hdc, use );
 430     SystemPaletteUse = use;
 431     return old;
 432 }
 433
 434
 435 /***********************************************************************
 436  *           GetSystemPaletteUse   (GDI.374)
 437  */
 438 UINT16 WINAPI GetSystemPaletteUse16( HDC16 hdc )
 439 {
 440     return SystemPaletteUse;
 441 }
 442
 443
 444 /***********************************************************************
 445  * GetSystemPaletteUse [GDI32.@]  Gets state of system palette
 446  *
 447  * RETURNS
 448  *    Current state of system palette
 449  */
 450 UINT WINAPI GetSystemPaletteUse(
 451     HDC hdc) /* [in] Handle of device context */
 452 {
 453     return SystemPaletteUse;
 454 }
 455
 456
 457 /***********************************************************************
 458  *           GetSystemPaletteEntries   (GDI.375)
 459  */
 460 UINT16 WINAPI GetSystemPaletteEntries16( HDC16 hdc, UINT16 start, UINT16 count,
 461                                          LPPALETTEENTRY entries )
 462 {
 463     return GetSystemPaletteEntries( hdc, start, count, entries );
 464 }
 465
 466
 467 /***********************************************************************
 468  * GetSystemPaletteEntries [GDI32.@]  Gets range of palette entries
 469  *
 470  * RETURNS
 471  *    Success: Number of entries retrieved from palette
 472  *    Failure: 0
 473  */
 474 UINT WINAPI GetSystemPaletteEntries(
 475     HDC hdc,              /* [in]  Handle of device context */
 476     UINT start,           /* [in]  Index of first entry to be retrieved */
 477     UINT count,           /* [in]  Number of entries to be retrieved */
 478     LPPALETTEENTRY entries) /* [out] Array receiving system-palette entries */
 479 {
 480     UINT i;
 481     DC *dc;
 482
 483     TRACE("hdc=%04x,start=%i,count=%i\n", hdc,start,count);
 484
 485     if (!(dc = DC_GetDCPtr( hdc ))) return 0;
 486
 487     if (!entries)
 488     {
 489         count = dc->devCaps->sizePalette;
 490         goto done;
 491     }
 492
 493     if (start >= dc->devCaps->sizePalette)
 494       {
 495         count = 0;
 496         goto done;
 497       }
 498
 499     if (start+count >= dc->devCaps->sizePalette)
 500         count = dc->devCaps->sizePalette - start;
 501     for (i = 0; i < count; i++)
 502     {
 503         *(COLORREF*)(entries + i) = COLOR_GetSystemPaletteEntry( start + i );
 504
 505         TRACE("\tidx(%02x) -> RGB(%08lx)\n",
 506                          start + i, *(COLORREF*)(entries + i) );
 507     }
 508  done:
 509     GDI_ReleaseObj( hdc );
 510     return count;
 511 }
 512
 513
 514 /***********************************************************************
 515  *           GetNearestPaletteIndex   (GDI.370)
 516  */
 517 UINT16 WINAPI GetNearestPaletteIndex16( HPALETTE16 hpalette, COLORREF color )
 518 {
 519     return GetNearestPaletteIndex( hpalette, color );
 520 }
 521
 522
 523 /***********************************************************************
 524  * GetNearestPaletteIndex [GDI32.@]  Gets palette index for color
 525  *
 526  * NOTES
 527  *    Should index be initialized to CLR_INVALID instead of 0?
 528  *
 529  * RETURNS
 530  *    Success: Index of entry in logical palette
 531  *    Failure: CLR_INVALID
 532  */
 533 UINT WINAPI GetNearestPaletteIndex(
 534     HPALETTE hpalette, /* [in] Handle of logical color palette */
 535     COLORREF color)      /* [in] Color to be matched */
 536 {
 537     PALETTEOBJ* palObj = (PALETTEOBJ*)GDI_GetObjPtr( hpalette, PALETTE_MAGIC );
 538     UINT index  = 0;
 539
 540     if( palObj )
 541     {
 542       index = COLOR_PaletteLookupPixel(palObj->logpalette.palPalEntry,
 543                                        palObj->logpalette.palNumEntries,
 544                                        NULL, color, FALSE );
 545
 546       GDI_ReleaseObj( hpalette );
 547     }
 548     TRACE("(%04x,%06lx): returning %d\n", hpalette, color, index );
 549     return index;
 550 }
 551
 552
 553 /***********************************************************************
 554  *           GetNearestColor   (GDI.154)
 555  */
 556 COLORREF WINAPI GetNearestColor16( HDC16 hdc, COLORREF color )
 557 {
 558     return GetNearestColor( hdc, color );
 559 }
 560
 561
 562 /***********************************************************************
 563  * GetNearestColor [GDI32.@]  Gets a system color to match
 564  *
 565  * RETURNS
 566  *    Success: Color from system palette that corresponds to given color
 567  *    Failure: CLR_INVALID
 568  */
 569 COLORREF WINAPI GetNearestColor(
 570     HDC hdc,      /* [in] Handle of device context */
 571     COLORREF color) /* [in] Color to be matched */
 572 {
 573     COLORREF     nearest = CLR_INVALID;
 574     DC          *dc;
 575     PALETTEOBJ  *palObj;
 576
 577     if ( (dc = DC_GetDCPtr( hdc )) )
 578     {
 579         HPALETTE hpal = (dc->hPalette)? dc->hPalette : GetStockObject( DEFAULT_PALETTE );
 580         palObj = GDI_GetObjPtr( hpal, PALETTE_MAGIC );
 581         if (!palObj) {
 582             GDI_ReleaseObj( hdc );
 583             return nearest;
 584         }
 585
 586         nearest = COLOR_LookupNearestColor( palObj->logpalette.palPalEntry,
 587                                             palObj->logpalette.palNumEntries, color );
 588         GDI_ReleaseObj( hpal );
 589         GDI_ReleaseObj( hdc );
 590     }
 591
 592     TRACE("(%06lx): returning %06lx\n", color, nearest );
 593     return nearest;
 594 }
 595
 596
 597 /***********************************************************************
 598  *           PALETTE_GetObject
 599  */
 600 int PALETTE_GetObject( PALETTEOBJ * palette, int count, LPSTR buffer )
 601 {
 602     if (count > sizeof(WORD)) count = sizeof(WORD);
 603     memcpy( buffer, &palette->logpalette.palNumEntries, count );
 604     return count;
 605 }
 606
 607
 608 /***********************************************************************
 609  *           PALETTE_UnrealizeObject
 610  */
 611 BOOL PALETTE_UnrealizeObject( HPALETTE16 hpalette, PALETTEOBJ *palette )
 612 {
 613     if (palette->mapping)
 614     {
 615         HeapFree( GetProcessHeap(), 0, palette->mapping );
 616         palette->mapping = NULL;
 617     }
 618     if (hLastRealizedPalette == hpalette) hLastRealizedPalette = 0;
 619     return TRUE;
 620 }
 621
 622
 623 /***********************************************************************
 624  *           PALETTE_DeleteObject
 625  */
 626 BOOL PALETTE_DeleteObject( HPALETTE16 hpalette, PALETTEOBJ *palette )
 627 {
 628     HeapFree( GetProcessHeap(), 0, palette->mapping );
 629     if (hLastRealizedPalette == hpalette) hLastRealizedPalette = 0;
 630     return GDI_FreeObject( hpalette, palette );
 631 }
 632
 633
 634 /***********************************************************************
 635  *           GDISelectPalette    (GDI.361)
 636  */
 637 HPALETTE16 WINAPI GDISelectPalette16( HDC16 hdc, HPALETTE16 hpal, WORD wBkg)
 638 {
 639     HPALETTE16 prev;
 640     DC *dc;
 641
 642     TRACE("%04x %04x\n", hdc, hpal );
 643
 644     if (GetObjectType(hpal) != OBJ_PAL)
 645     {
 646       WARN("invalid selected palette %04x\n",hpal);
 647       return 0;
 648     }
 649     if (!(dc = DC_GetDCPtr( hdc ))) return 0;
 650     prev = dc->hPalette;
 651     dc->hPalette = hpal;
 652     GDI_ReleaseObj( hdc );
 653     if (!wBkg) hPrimaryPalette = hpal;
 654     return prev;
 655 }
 656
 657
 658 /***********************************************************************
 659  *           GDIRealizePalette    (GDI.362)
 660  */
 661 UINT16 WINAPI GDIRealizePalette16( HDC16 hdc )
 662 {
 663     PALETTEOBJ* palPtr;
 664     int realized = 0;
 665     DC* dc = DC_GetDCPtr( hdc );
 666
 667     if (!dc) return 0;
 668
 669     TRACE("%04x...\n", hdc );
 670
 671     if(dc->hPalette != hLastRealizedPalette )
 672     {
 673         if( dc->hPalette == GetStockObject( DEFAULT_PALETTE )) {
 674             realized = RealizeDefaultPalette16( hdc );
 675             GDI_ReleaseObj( hdc );
 676             return (UINT16)realized;
 677         }
 678
 679
 680         palPtr = (PALETTEOBJ *) GDI_GetObjPtr( dc->hPalette, PALETTE_MAGIC );
 681
 682         if (!palPtr) {
 683             GDI_ReleaseObj( hdc );
 684             FIXME("invalid selected palette %04x\n",dc->hPalette);
 685             return 0;
 686         }
 687
 688         realized = PALETTE_Driver->
 689           pSetMapping(palPtr,0,palPtr->logpalette.palNumEntries,
 690                       (dc->hPalette != hPrimaryPalette) ||
 691                       (dc->hPalette == GetStockObject( DEFAULT_PALETTE )));
 692         hLastRealizedPalette = dc->hPalette;
 693         GDI_ReleaseObj( dc->hPalette );
 694     }
 695     else TRACE("  skipping (hLastRealizedPalette = %04x)\n",
 696                          hLastRealizedPalette);
 697     GDI_ReleaseObj( hdc );
 698
 699     TRACE("   realized %i colors.\n", realized );
 700     return (UINT16)realized;
 701 }
 702
 703
 704 /***********************************************************************
 705  *           RealizeDefaultPalette    (GDI.365)
 706  */
 707 UINT16 WINAPI RealizeDefaultPalette16( HDC16 hdc )
 708 {
 709     UINT16 ret = 0;
 710     DC          *dc;
 711     PALETTEOBJ*  palPtr;
 712
 713     TRACE("%04x\n", hdc );
 714
 715     if (!(dc = DC_GetDCPtr( hdc ))) return 0;
 716
 717     if (!(dc->flags & DC_MEMORY))
 718     {
 719         palPtr = (PALETTEOBJ*)GDI_GetObjPtr( GetStockObject(DEFAULT_PALETTE), PALETTE_MAGIC );
 720         if (palPtr)
 721         {
 722             /* lookup is needed to account for SetSystemPaletteUse() stuff */
 723             ret = PALETTE_Driver->pUpdateMapping(palPtr);
 724             GDI_ReleaseObj( GetStockObject(DEFAULT_PALETTE) );
 725         }
 726     }
 727     GDI_ReleaseObj( hdc );
 728     return ret;
 729 }
 730
 731 /***********************************************************************
 732  *           IsDCCurrentPalette   (GDI.412)
 733  */
 734 BOOL16 WINAPI IsDCCurrentPalette16(HDC16 hDC)
 735 {
 736     DC *dc = DC_GetDCPtr( hDC );
 737     if (dc)
 738     {
 739       BOOL bRet = dc->hPalette == hPrimaryPalette;
 740       GDI_ReleaseObj( hDC );
 741       return bRet;
 742     }
 743     return FALSE;
 744 }
 745
 746
 747 /***********************************************************************
 748  * SelectPalette [GDI32.@]  Selects logical palette into DC
 749  *
 750  * RETURNS
 751  *    Success: Previous logical palette
 752  *    Failure: NULL
 753  */
 754 HPALETTE WINAPI SelectPalette(
 755     HDC hDC,               /* [in] Handle of device context */
 756     HPALETTE hPal,         /* [in] Handle of logical color palette */
 757     BOOL bForceBackground) /* [in] Foreground/background mode */
 758 {
 759     return pfnSelectPalette( hDC, hPal, bForceBackground );
 760 }
 761
 762
 763 /***********************************************************************
 764  * RealizePalette [GDI32.@]  Maps palette entries to system palette
 765  *
 766  * RETURNS
 767  *    Success: Number of entries in logical palette
 768  *    Failure: GDI_ERROR
 769  */
 770 UINT WINAPI RealizePalette(
 771     HDC hDC) /* [in] Handle of device context */
 772 {
 773     return pfnRealizePalette( hDC );
 774 }
 775
 776
 777 typedef HWND WINAPI (*WindowFromDC_funcptr)( HDC );
 778 typedef BOOL WINAPI (*RedrawWindow_funcptr)( HWND, const RECT *, HRGN, UINT );
 779
 780 /**********************************************************************
 781  * UpdateColors [GDI32.@]  Remaps current colors to logical palette
 782  *
 783  * RETURNS
 784  *    Success: TRUE
 785  *    Failure: FALSE
 786  */
 787 BOOL WINAPI UpdateColors(
 788     HDC hDC) /* [in] Handle of device context */
 789 {
 790     HMODULE mod;
 791     DC *dc;
 792     int size;
 793
 794     if (!(dc = DC_GetDCPtr( hDC ))) return 0;
 795     size = dc->devCaps->sizePalette;
 796     GDI_ReleaseObj( hDC );
 797
 798     mod = GetModuleHandleA("user32.dll");
 799     if (mod)
 800     {
 801         WindowFromDC_funcptr pWindowFromDC = (WindowFromDC_funcptr)GetProcAddress(mod,"WindowFromDC");
 802         if (pWindowFromDC)
 803         {
 804             HWND hWnd = pWindowFromDC( hDC );
 805
 806             /* Docs say that we have to remap current drawable pixel by pixel
 807              * but it would take forever given the speed of XGet/PutPixel.
 808              */
 809             if (hWnd && size)
 810             {
 811                 RedrawWindow_funcptr pRedrawWindow = GetProcAddress( mod, "RedrawWindow" );
 812                 if (pRedrawWindow) pRedrawWindow( hWnd, NULL, 0, RDW_INVALIDATE );
 813             }
 814         }
 815     }
 816     return 0x666;
 817 }
 818
 819
 820 /**********************************************************************
 821  *            UpdateColors   (DISPLAY.366)
 822  *            UpdateColors16   (GDI.366)
 823  */
 824 INT16 WINAPI UpdateColors16( HDC16 hDC )
 825 {
 826     UpdateColors( hDC );
 827     return TRUE;
 828 }
 829
 830
 831 /*********************************************************************
 832  *           SetMagicColors   (GDI.606)
 833  */
 834 VOID WINAPI SetMagicColors16(HDC16 hDC, COLORREF color, UINT16 index)
 835 {
 836     FIXME("(hDC %04x, color %04x, index %04x): stub\n", hDC, (int)color, index);
 837
 838 }
 839
 840 /**********************************************************************
 841  * GetICMProfileA [GDI32.@]
 842  *
 843  * Returns the filename of the specified device context's color
 844  * management profile, even if color management is not enabled
 845  * for that DC.
 846  *
 847  * RETURNS
 848  *    TRUE if name copied succesfully OR lpszFilename is NULL
 849  *    FALSE if the buffer length pointed to by lpcbName is too small
 850  *
 851  * NOTE
 852  *    The buffer length pointed to by lpcbName is ALWAYS updated to
 853  *    the length required regardless of other actions this function
 854  *    may take.
 855  *
 856  * FIXME
 857  *    How does Windows assign these?  Some registry key?
 858  */
 859
 860 #define WINEICM "winefake.icm"  /* easy-to-identify fake filename */
 861
 862 /*********************************************************************/
 863
 864 BOOL WINAPI GetICMProfileA(HDC hDC, LPDWORD lpcbName, LPSTR lpszFilename)
 865 {
 866     DWORD callerLen;
 867
 868     FIXME("(%04x, %p, %p): partial stub\n", hDC, lpcbName, lpszFilename);
 869
 870     callerLen = *lpcbName;
 871
 872     /* all 3 behaviors require the required buffer size to be set */
 873     *lpcbName = strlen(WINEICM);
 874
 875     /* behavior 1: if lpszFilename is NULL, return size of string and no error */
 876     if ((DWORD)lpszFilename == (DWORD)0x00000000)
 877         return TRUE;
 878
 879     /* behavior 2: if buffer size too small, return size of string and error */
 880     if (callerLen < strlen(WINEICM))
 881     {
 882         SetLastError(ERROR_INSUFFICIENT_BUFFER);
 883         return FALSE;
 884     }
 885
 886     /* behavior 3: if buffer size OK and pointer not NULL, copy and return size */
 887     strcpy(lpszFilename, WINEICM);
 888     return TRUE;
 889 }