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 #include "ts_xlib.h"
  14
  15 #include "gdi.h"
  16 #include "color.h"
  17 #include "palette.h"
  18 #include "xmalloc.h"
  19 #include "debug.h"
  20
  21 FARPROC32 pfnSelectPalette = NULL;
  22 FARPROC32 pfnRealizePalette = NULL;
  23
  24 static UINT32 SystemPaletteUse = SYSPAL_STATIC;  /* currently not considered */
  25
  26 static HPALETTE16 hPrimaryPalette = 0; /* used for WM_PALETTECHANGED */
  27 static HPALETTE16 hLastRealizedPalette = 0; /* UnrealizeObject() needs it */
  28
  29
  30 /***********************************************************************
  31  *           PALETTE_Init
  32  *
  33  * Create the system palette.
  34  */
  35 HPALETTE16 PALETTE_Init(void)
  36 {
  37     int                 i;
  38     HPALETTE16          hpalette;
  39     LOGPALETTE *        palPtr;
  40     PALETTEOBJ*         palObj;
  41     const PALETTEENTRY* __sysPalTemplate = COLOR_GetSystemPaletteTemplate();
  42
  43     /* create default palette (20 system colors) */
  44
  45     palPtr = HeapAlloc( GetProcessHeap(), 0,
  46              sizeof(LOGPALETTE) + (NB_RESERVED_COLORS-1)*sizeof(PALETTEENTRY));
  47     if (!palPtr) return FALSE;
  48
  49     palPtr->palVersion = 0x300;
  50     palPtr->palNumEntries = NB_RESERVED_COLORS;
  51     for( i = 0; i < NB_RESERVED_COLORS; i ++ )
  52     {
  53         palPtr->palPalEntry[i].peRed = __sysPalTemplate[i].peRed;
  54         palPtr->palPalEntry[i].peGreen = __sysPalTemplate[i].peGreen;
  55         palPtr->palPalEntry[i].peBlue = __sysPalTemplate[i].peBlue;
  56         palPtr->palPalEntry[i].peFlags = 0;
  57     }
  58     hpalette = CreatePalette16( palPtr );
  59
  60     palObj = (PALETTEOBJ*) GDI_GetObjPtr( hpalette, PALETTE_MAGIC );
  61
  62     palObj->mapping = xmalloc( sizeof(int) * 20 );
  63
  64     GDI_HEAP_UNLOCK( hpalette );
  65
  66     HeapFree( GetProcessHeap(), 0, palPtr );
  67     return hpalette;
  68 }
  69
  70 /***********************************************************************
  71  *           PALETTE_ValidateFlags
  72  */
  73 void PALETTE_ValidateFlags(PALETTEENTRY* lpPalE, int size)
  74 {
  75     int i = 0;
  76     for( ; i<size ; i++ )
  77         lpPalE[i].peFlags = PC_SYS_USED | (lpPalE[i].peFlags & 0x07);
  78 }
  79
  80
  81 /***********************************************************************
  82  *           CreatePalette16    (GDI.360)
  83  */
  84 HPALETTE16 WINAPI CreatePalette16( const LOGPALETTE* palette )
  85 {
  86     return CreatePalette32( palette );
  87 }
  88
  89
  90 /***********************************************************************
  91  * CreatePalette32 [GDI32.53]  Creates a logical color palette
  92  *
  93  * RETURNS
  94  *    Success: Handle to logical palette
  95  *    Failure: NULL
  96  */
  97 HPALETTE32 WINAPI CreatePalette32(
  98     const LOGPALETTE* palette) /* [in] Pointer to logical color palette */
  99 {
 100     PALETTEOBJ * palettePtr;
 101     HPALETTE32 hpalette;
 102     int size = sizeof(LOGPALETTE) + (palette->palNumEntries - 1) * sizeof(PALETTEENTRY);
 103
 104     TRACE(palette,"entries=%i\n", palette->palNumEntries);
 105
 106     hpalette = GDI_AllocObject( size + sizeof(int*) +sizeof(GDIOBJHDR) , PALETTE_MAGIC );
 107     if (!hpalette) return 0;
 108
 109     palettePtr = (PALETTEOBJ *) GDI_HEAP_LOCK( hpalette );
 110     memcpy( &palettePtr->logpalette, palette, size );
 111     PALETTE_ValidateFlags(palettePtr->logpalette.palPalEntry,
 112                           palettePtr->logpalette.palNumEntries);
 113     palettePtr->mapping = NULL;
 114     GDI_HEAP_UNLOCK( hpalette );
 115
 116     TRACE(palette,"   returning %04x\n", hpalette);
 117     return hpalette;
 118 }
 119
 120
 121 /***********************************************************************
 122  * CreateHalftonePalette [GDI32.47]  Creates a halftone palette
 123  *
 124  * RETURNS
 125  *    Success: Handle to logical halftone palette
 126  *    Failure: 0
 127  */
 128 HPALETTE32 WINAPI CreateHalftonePalette(
 129     HDC32 hdc) /* [in] Handle to device context */
 130 {
 131     FIXME(palette,"(0x%x): stub\n", hdc);
 132     return (HPALETTE32)NULL;
 133 }
 134
 135
 136 /***********************************************************************
 137  *           GetPaletteEntries16    (GDI.363)
 138  */
 139 UINT16 WINAPI GetPaletteEntries16( HPALETTE16 hpalette, UINT16 start,
 140                                    UINT16 count, LPPALETTEENTRY entries )
 141 {
 142     return GetPaletteEntries32( hpalette, start, count, entries );
 143 }
 144
 145
 146 /***********************************************************************
 147  * GetPaletteEntries32 [GDI32.209]  Retrieves palette entries
 148  *
 149  * RETURNS
 150  *    Success: Number of entries from logical palette
 151  *    Failure: 0
 152  */
 153 UINT32 WINAPI GetPaletteEntries32(
 154     HPALETTE32 hpalette,    /* [in]  Handle of logical palette */
 155     UINT32 start,           /* [in]  First entry to receive */
 156     UINT32 count,           /* [in]  Number of entries to receive */
 157     LPPALETTEENTRY entries) /* [out] Address of array receiving entries */
 158 {
 159     PALETTEOBJ * palPtr;
 160     INT32 numEntries;
 161
 162     TRACE(palette,"hpal = %04x, count=%i\n", hpalette, count );
 163
 164     palPtr = (PALETTEOBJ *) GDI_GetObjPtr( hpalette, PALETTE_MAGIC );
 165     if (!palPtr) return 0;
 166
 167     numEntries = palPtr->logpalette.palNumEntries;
 168     if (start+count > numEntries) count = numEntries - start;
 169     if (entries)
 170     {
 171       if (start >= numEntries)
 172       {
 173         GDI_HEAP_UNLOCK( hpalette );
 174         return 0;
 175       }
 176       memcpy( entries, &palPtr->logpalette.palPalEntry[start],
 177               count * sizeof(PALETTEENTRY) );
 178       for( numEntries = 0; numEntries < count ; numEntries++ )
 179            if (entries[numEntries].peFlags & 0xF0)
 180                entries[numEntries].peFlags = 0;
 181       GDI_HEAP_UNLOCK( hpalette );
 182     }
 183
 184     return count;
 185 }
 186
 187
 188 /***********************************************************************
 189  *           SetPaletteEntries16    (GDI.364)
 190  */
 191 UINT16 WINAPI SetPaletteEntries16( HPALETTE16 hpalette, UINT16 start,
 192                                    UINT16 count, LPPALETTEENTRY entries )
 193 {
 194     return SetPaletteEntries32( hpalette, start, count, entries );
 195 }
 196
 197
 198 /***********************************************************************
 199  * SetPaletteEntries32 [GDI32.326]  Sets color values for range in palette
 200  *
 201  * RETURNS
 202  *    Success: Number of entries that were set
 203  *    Failure: 0
 204  */
 205 UINT32 WINAPI SetPaletteEntries32(
 206     HPALETTE32 hpalette,    /* [in] Handle of logical palette */
 207     UINT32 start,           /* [in] Index of first entry to set */
 208     UINT32 count,           /* [in] Number of entries to set */
 209     LPPALETTEENTRY entries) /* [in] Address of array of structures */
 210 {
 211     PALETTEOBJ * palPtr;
 212     INT32 numEntries;
 213
 214     TRACE(palette,"hpal=%04x,start=%i,count=%i\n",hpalette,start,count );
 215
 216     palPtr = (PALETTEOBJ *) GDI_GetObjPtr( hpalette, PALETTE_MAGIC );
 217     if (!palPtr) return 0;
 218
 219     numEntries = palPtr->logpalette.palNumEntries;
 220     if (start >= numEntries)
 221     {
 222       GDI_HEAP_UNLOCK( hpalette );
 223       return 0;
 224     }
 225     if (start+count > numEntries) count = numEntries - start;
 226     memcpy( &palPtr->logpalette.palPalEntry[start], entries,
 227             count * sizeof(PALETTEENTRY) );
 228     PALETTE_ValidateFlags(palPtr->logpalette.palPalEntry,
 229                           palPtr->logpalette.palNumEntries);
 230     free(palPtr->mapping);
 231     palPtr->mapping = NULL;
 232     GDI_HEAP_UNLOCK( hpalette );
 233     return count;
 234 }
 235
 236
 237 /***********************************************************************
 238  *           ResizePalette16   (GDI.368)
 239  */
 240 BOOL16 WINAPI ResizePalette16( HPALETTE16 hPal, UINT16 cEntries )
 241 {
 242     return ResizePalette32( hPal, cEntries );
 243 }
 244
 245
 246 /***********************************************************************
 247  * ResizePalette32 [GDI32.289]  Resizes logical palette
 248  *
 249  * RETURNS
 250  *    Success: TRUE
 251  *    Failure: FALSE
 252  */
 253 BOOL32 WINAPI ResizePalette32(
 254     HPALETTE32 hPal, /* [in] Handle of logical palette */
 255     UINT32 cEntries) /* [in] Number of entries in logical palette */
 256 {
 257     PALETTEOBJ * palPtr = (PALETTEOBJ *) GDI_GetObjPtr( hPal, PALETTE_MAGIC );
 258     UINT32       cPrevEnt, prevVer;
 259     int          prevsize, size = sizeof(LOGPALETTE) + (cEntries - 1) * sizeof(PALETTEENTRY);
 260     int*         mapping = NULL;
 261
 262     TRACE(palette,"hpal = %04x, prev = %i, new = %i\n",
 263                     hPal, palPtr ? palPtr->logpalette.palNumEntries : -1,
 264                     cEntries );
 265     if( !palPtr ) return FALSE;
 266     cPrevEnt = palPtr->logpalette.palNumEntries;
 267     prevVer = palPtr->logpalette.palVersion;
 268     prevsize = sizeof(LOGPALETTE) + (cPrevEnt - 1) * sizeof(PALETTEENTRY) +
 269                                         sizeof(int*) + sizeof(GDIOBJHDR);
 270     size += sizeof(int*) + sizeof(GDIOBJHDR);
 271     mapping = palPtr->mapping;
 272
 273     GDI_HEAP_UNLOCK( hPal );
 274
 275     hPal = GDI_HEAP_REALLOC( hPal, size );
 276     palPtr = (PALETTEOBJ *) GDI_GetObjPtr( hPal, PALETTE_MAGIC );
 277     if( !palPtr ) return FALSE;
 278
 279     if( mapping )
 280         palPtr->mapping = (int*) xrealloc( mapping, cEntries * sizeof(int) );
 281     if( cEntries > cPrevEnt )
 282     {
 283         if( mapping )
 284             memset(palPtr->mapping + cPrevEnt, 0, (cEntries - cPrevEnt)*sizeof(int));
 285         memset( (BYTE*)palPtr + prevsize, 0, size - prevsize );
 286         PALETTE_ValidateFlags((PALETTEENTRY*)((BYTE*)palPtr + prevsize),
 287                                                      cEntries - cPrevEnt );
 288     }
 289     palPtr->logpalette.palNumEntries = cEntries;
 290     palPtr->logpalette.palVersion = prevVer;
 291     GDI_HEAP_UNLOCK( hPal );
 292     return TRUE;
 293 }
 294
 295
 296 /***********************************************************************
 297  *           AnimatePalette16   (GDI.367)
 298  */
 299 void WINAPI AnimatePalette16( HPALETTE16 hPal, UINT16 StartIndex,
 300                               UINT16 NumEntries, LPPALETTEENTRY PaletteColors)
 301 {
 302     AnimatePalette32( hPal, StartIndex, NumEntries, PaletteColors );
 303 }
 304
 305
 306 /***********************************************************************
 307  * AnimatePalette32 [GDI32.6]  Replaces entries in logical palette
 308  *
 309  * RETURNS
 310  *    Success: TRUE
 311  *    Failure: FALSE
 312  *
 313  * FIXME
 314  *    Should use existing mapping when animating a primary palette
 315  */
 316 BOOL32 WINAPI AnimatePalette32(
 317     HPALETTE32 hPal,              /* [in] Handle to logical palette */
 318     UINT32 StartIndex,            /* [in] First entry in palette */
 319     UINT32 NumEntries,            /* [in] Count of entries in palette */
 320     LPPALETTEENTRY PaletteColors) /* [in] Pointer to first replacement */
 321 {
 322     TRACE(palette, "%04x (%i - %i)\n", hPal, StartIndex,StartIndex+NumEntries);
 323
 324     if( hPal != STOCK_DEFAULT_PALETTE )
 325     {
 326         PALETTEOBJ* palPtr = (PALETTEOBJ *)GDI_GetObjPtr(hPal, PALETTE_MAGIC);
 327
 328         if( (StartIndex + NumEntries) <= palPtr->logpalette.palNumEntries )
 329         {
 330             UINT32 u;
 331             for( u = 0; u < NumEntries; u++ )
 332                 palPtr->logpalette.palPalEntry[u + StartIndex] = PaletteColors[u];
 333             COLOR_SetMapping(palPtr, StartIndex, NumEntries,
 334                              hPal != hPrimaryPalette );
 335             GDI_HEAP_UNLOCK( hPal );
 336             return TRUE;
 337         }
 338     }
 339     return FALSE;
 340 }
 341
 342
 343 /***********************************************************************
 344  *           SetSystemPaletteUse16   (GDI.373)
 345  */
 346 UINT16 WINAPI SetSystemPaletteUse16( HDC16 hdc, UINT16 use )
 347 {
 348     return SetSystemPaletteUse32( hdc, use );
 349 }
 350
 351
 352 /***********************************************************************
 353  * SetSystemPaletteUse32 [GDI32.335]
 354  *
 355  * RETURNS
 356  *    Success: Previous system palette
 357  *    Failure: SYSPAL_ERROR
 358  */
 359 UINT32 WINAPI SetSystemPaletteUse32(
 360     HDC32 hdc,  /* [in] Handle of device context */
 361     UINT32 use) /* [in] Palette-usage flag */
 362 {
 363     UINT32 old = SystemPaletteUse;
 364     FIXME(palette,"(%04x,%04x): stub\n", hdc, use );
 365     SystemPaletteUse = use;
 366     return old;
 367 }
 368
 369
 370 /***********************************************************************
 371  *           GetSystemPaletteUse16   (GDI.374)
 372  */
 373 UINT16 WINAPI GetSystemPaletteUse16( HDC16 hdc )
 374 {
 375     return SystemPaletteUse;
 376 }
 377
 378
 379 /***********************************************************************
 380  * GetSystemPaletteUse32 [GDI32.223]  Gets state of system palette
 381  *
 382  * RETURNS
 383  *    Current state of system palette
 384  */
 385 UINT32 WINAPI GetSystemPaletteUse32(
 386     HDC32 hdc) /* [in] Handle of device context */
 387 {
 388     return SystemPaletteUse;
 389 }
 390
 391
 392 /***********************************************************************
 393  *           GetSystemPaletteEntries16   (GDI.375)
 394  */
 395 UINT16 WINAPI GetSystemPaletteEntries16( HDC16 hdc, UINT16 start, UINT16 count,
 396                                          LPPALETTEENTRY entries )
 397 {
 398     return GetSystemPaletteEntries32( hdc, start, count, entries );
 399 }
 400
 401
 402 /***********************************************************************
 403  * GetSystemPaletteEntries32 [GDI32.222]  Gets range of palette entries
 404  *
 405  * RETURNS
 406  *    Success: Number of entries retrieved from palette
 407  *    Failure: 0
 408  */
 409 UINT32 WINAPI GetSystemPaletteEntries32(
 410     HDC32 hdc,              /* [in]  Handle of device context */
 411     UINT32 start,           /* [in]  Index of first entry to be retrieved */
 412     UINT32 count,           /* [in]  Number of entries to be retrieved */
 413     LPPALETTEENTRY entries) /* [out] Array receiving system-palette entries */
 414 {
 415     UINT32 i;
 416     DC *dc;
 417
 418     TRACE(palette, "hdc=%04x,start=%i,count=%i\n", hdc,start,count);
 419
 420     if (!(dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC ))) return 0;
 421     if (start >= dc->w.devCaps->sizePalette)
 422       {
 423         GDI_HEAP_UNLOCK( hdc );
 424         return 0;
 425       }
 426     if (start+count >= dc->w.devCaps->sizePalette)
 427         count = dc->w.devCaps->sizePalette - start;
 428     for (i = 0; i < count; i++)
 429     {
 430         *(COLORREF*)(entries + i) = COLOR_GetSystemPaletteEntry( start + i );
 431
 432         TRACE(palette,"\tidx(%02x) -> RGB(%08lx)\n",
 433                          start + i, *(COLORREF*)(entries + i) );
 434     }
 435     GDI_HEAP_UNLOCK( hdc );
 436     return count;
 437 }
 438
 439
 440 /***********************************************************************
 441  *           GetNearestPaletteIndex16   (GDI.370)
 442  */
 443 UINT16 WINAPI GetNearestPaletteIndex16( HPALETTE16 hpalette, COLORREF color )
 444 {
 445     return GetNearestPaletteIndex32( hpalette, color );
 446 }
 447
 448
 449 /***********************************************************************
 450  * GetNearestPaletteIndex32 [GDI32.203]  Gets palette index for color
 451  *
 452  * NOTES
 453  *    Should index be initialized to CLR_INVALID instead of 0?
 454  *
 455  * RETURNS
 456  *    Success: Index of entry in logical palette
 457  *    Failure: CLR_INVALID
 458  */
 459 UINT32 WINAPI GetNearestPaletteIndex32(
 460     HPALETTE32 hpalette, /* [in] Handle of logical color palette */
 461     COLORREF color)      /* [in] Color to be matched */
 462 {
 463     PALETTEOBJ* palObj = (PALETTEOBJ*)GDI_GetObjPtr( hpalette, PALETTE_MAGIC );
 464     UINT32 index  = 0;
 465
 466     if( palObj )
 467         index = COLOR_PaletteLookupPixel( palObj->logpalette.palPalEntry,
 468                                           palObj->logpalette.palNumEntries,
 469                                           NULL, color, FALSE );
 470
 471     TRACE(palette,"(%04x,%06lx): returning %d\n", hpalette, color, index );
 472     GDI_HEAP_UNLOCK( hpalette );
 473     return index;
 474 }
 475
 476
 477 /***********************************************************************
 478  *           GetNearestColor16   (GDI.154)
 479  */
 480 COLORREF WINAPI GetNearestColor16( HDC16 hdc, COLORREF color )
 481 {
 482     return GetNearestColor32( hdc, color );
 483 }
 484
 485
 486 /***********************************************************************
 487  * GetNearestColor32 [GDI32.202]  Gets a system color to match
 488  *
 489  * NOTES
 490  *    Should this return CLR_INVALID instead of FadeCafe?
 491  *
 492  * RETURNS
 493  *    Success: Color from system palette that corresponds to given color
 494  *    Failure: CLR_INVALID
 495  */
 496 COLORREF WINAPI GetNearestColor32(
 497     HDC32 hdc,      /* [in] Handle of device context */
 498     COLORREF color) /* [in] Color to be matched */
 499 {
 500     COLORREF     nearest = 0xFADECAFE;
 501     DC          *dc;
 502     PALETTEOBJ  *palObj;
 503
 504     if ( (dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC )) )
 505     {
 506       palObj = (PALETTEOBJ*)
 507                 GDI_GetObjPtr( (dc->w.hPalette)? dc->w.hPalette
 508                                                : STOCK_DEFAULT_PALETTE, PALETTE_MAGIC );
 509
 510       nearest = COLOR_LookupNearestColor( palObj->logpalette.palPalEntry,
 511                                           palObj->logpalette.palNumEntries, color );
 512       GDI_HEAP_UNLOCK( dc->w.hPalette );
 513     }
 514
 515     TRACE(palette,"(%06lx): returning %06lx\n", color, nearest );
 516     GDI_HEAP_UNLOCK( hdc );
 517     return nearest;
 518 }
 519
 520
 521 /***********************************************************************
 522  *           PALETTE_GetObject
 523  */
 524 int PALETTE_GetObject( PALETTEOBJ * palette, int count, LPSTR buffer )
 525 {
 526     if (count > sizeof(WORD)) count = sizeof(WORD);
 527     memcpy( buffer, &palette->logpalette.palNumEntries, count );
 528     return count;
 529 }
 530
 531
 532 /***********************************************************************
 533  *           PALETTE_UnrealizeObject
 534  */
 535 BOOL32 PALETTE_UnrealizeObject( HPALETTE16 hpalette, PALETTEOBJ *palette )
 536 {
 537     if (palette->mapping)
 538     {
 539         free( palette->mapping );
 540         palette->mapping = NULL;
 541     }
 542     if (hLastRealizedPalette == hpalette) hLastRealizedPalette = 0;
 543     return TRUE;
 544 }
 545
 546
 547 /***********************************************************************
 548  *           PALETTE_DeleteObject
 549  */
 550 BOOL32 PALETTE_DeleteObject( HPALETTE16 hpalette, PALETTEOBJ *palette )
 551 {
 552     free( palette->mapping );
 553     if (hLastRealizedPalette == hpalette) hLastRealizedPalette = 0;
 554     return GDI_FreeObject( hpalette );
 555 }
 556
 557
 558 /***********************************************************************
 559  *           GDISelectPalette    (GDI.361)
 560  */
 561 HPALETTE16 WINAPI GDISelectPalette( HDC16 hdc, HPALETTE16 hpal, WORD wBkg)
 562 {
 563     HPALETTE16 prev;
 564     DC *dc;
 565
 566     TRACE(palette, "%04x %04x\n", hdc, hpal );
 567
 568     dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
 569     if (!dc)
 570     {
 571         dc = (DC *)GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
 572         if (!dc) return 0;
 573     }
 574     prev = dc->w.hPalette;
 575     dc->w.hPalette = hpal;
 576     GDI_HEAP_UNLOCK( hdc );
 577     if (!wBkg) hPrimaryPalette = hpal;
 578     return prev;
 579 }
 580
 581
 582 /***********************************************************************
 583  *           GDIRealizePalette    (GDI.362)
 584  */
 585 UINT16 WINAPI GDIRealizePalette( HDC16 hdc )
 586 {
 587     PALETTEOBJ* palPtr;
 588     int realized = 0;
 589     DC*         dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
 590     if (!dc)
 591     {
 592         dc = (DC *)GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
 593         if (!dc) return 0;
 594     }
 595
 596     TRACE(palette, "%04x...\n", hdc );
 597
 598     if( dc &&  dc->w.hPalette != hLastRealizedPalette )
 599     {
 600         if( dc->w.hPalette == STOCK_DEFAULT_PALETTE )
 601             return RealizeDefaultPalette( hdc );
 602
 603         palPtr = (PALETTEOBJ *) GDI_GetObjPtr( dc->w.hPalette, PALETTE_MAGIC );
 604
 605         if (!palPtr) {
 606                 FIXME(palette,"invalid selected palette %04x\n",dc->w.hPalette);
 607                 return 0;
 608         }
 609
 610         realized = COLOR_SetMapping(palPtr,0,palPtr->logpalette.palNumEntries,
 611                                     (dc->w.hPalette != hPrimaryPalette) ||
 612                                     (dc->w.hPalette == STOCK_DEFAULT_PALETTE));
 613         GDI_HEAP_UNLOCK( dc->w.hPalette );
 614         hLastRealizedPalette = dc->w.hPalette;
 615     }
 616     else TRACE(palette, "  skipping (hLastRealizedPalette = %04x)\n",
 617                          hLastRealizedPalette);
 618     GDI_HEAP_UNLOCK( hdc );
 619
 620     TRACE(palette, "   realized %i colors.\n", realized );
 621     return (UINT16)realized;
 622 }
 623
 624
 625 /***********************************************************************
 626  *           RealizeDefaultPalette    (GDI.365)
 627  */
 628 UINT16 WINAPI RealizeDefaultPalette( HDC16 hdc )
 629 {
 630     DC          *dc;
 631     PALETTEOBJ*  palPtr;
 632     int          i, index, realized = 0;
 633
 634     TRACE(palette,"%04x\n", hdc );
 635
 636     dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
 637     if (!dc)
 638     {
 639         dc = (DC *)GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
 640         if (!dc) return 0;
 641     }
 642
 643     if ( dc->w.flags & DC_MEMORY )
 644       {
 645         GDI_HEAP_UNLOCK( hdc );
 646         return 0;
 647       }
 648
 649     hPrimaryPalette = STOCK_DEFAULT_PALETTE;
 650     hLastRealizedPalette = STOCK_DEFAULT_PALETTE;
 651
 652     palPtr = (PALETTEOBJ*)GDI_GetObjPtr(STOCK_DEFAULT_PALETTE, PALETTE_MAGIC );
 653
 654     /* lookup is needed to account for SetSystemPaletteUse() stuff */
 655
 656     for( i = 0; i < 20; i++ )
 657        {
 658          index = COLOR_LookupSystemPixel(*(COLORREF*)(palPtr->logpalette.palPalEntry + i));
 659
 660          /* mapping is allocated in COLOR_InitPalette() */
 661
 662          if( index != palPtr->mapping[i] ) { palPtr->mapping[i]=index; realized++; }
 663        }
 664     return realized;
 665 }
 666
 667 /***********************************************************************
 668  *           IsDCCurrentPalette   (GDI.412)
 669  */
 670 BOOL16 WINAPI IsDCCurrentPalette(HDC16 hDC)
 671 {
 672     DC* dc = (DC *)GDI_GetObjPtr( hDC, DC_MAGIC );
 673     if (dc)
 674     {
 675       GDI_HEAP_UNLOCK( hDC );
 676       return dc->w.hPalette == hPrimaryPalette;
 677     }
 678     return FALSE;
 679 }
 680
 681
 682 /***********************************************************************
 683  *           SelectPalette16    (USER.282)
 684  */
 685 HPALETTE16 WINAPI SelectPalette16( HDC16 hDC, HPALETTE16 hPal,
 686                                    BOOL16 bForceBackground )
 687 {
 688     return SelectPalette32( hDC, hPal, bForceBackground );
 689 }
 690
 691
 692 /***********************************************************************
 693  * SelectPalette32 [GDI32.300]  Selects logical palette into DC
 694  *
 695  * RETURNS
 696  *    Success: Previous logical palette
 697  *    Failure: NULL
 698  */
 699 HPALETTE32 WINAPI SelectPalette32(
 700     HDC32 hDC,               /* [in] Handle of device context */
 701     HPALETTE32 hPal,         /* [in] Handle of logical color palette */
 702     BOOL32 bForceBackground) /* [in] Foreground/background mode */
 703 {
 704     WORD        wBkgPalette = 1;
 705     PALETTEOBJ* lpt = (PALETTEOBJ*) GDI_GetObjPtr( hPal, PALETTE_MAGIC );
 706
 707     TRACE(palette,"dc=%04x,pal=%04x,force=%i\n", hDC, hPal, bForceBackground);
 708     if( !lpt ) return 0;
 709
 710     TRACE(palette," entries = %d\n", lpt->logpalette.palNumEntries);
 711     GDI_HEAP_UNLOCK( hPal );
 712
 713     if( hPal != STOCK_DEFAULT_PALETTE )
 714     {
 715         HWND32 hWnd = WindowFromDC32( hDC );
 716         HWND32 hActive = GetActiveWindow32();
 717
 718         /* set primary palette if it's related to current active */
 719
 720         if((!hWnd || (hActive == hWnd || IsChild16(hActive,hWnd))) &&
 721             !bForceBackground )
 722             wBkgPalette = 0;
 723     }
 724     return GDISelectPalette( hDC, hPal, wBkgPalette);
 725 }
 726
 727
 728 /***********************************************************************
 729  *           RealizePalette16    (USER.283)
 730  */
 731 UINT16 WINAPI RealizePalette16( HDC16 hDC )
 732 {
 733     return RealizePalette32( hDC );
 734 }
 735
 736
 737 /***********************************************************************
 738  * RealizePalette32 [GDI32.280]  Maps palette entries to system palette
 739  *
 740  * RETURNS
 741  *    Success: Number of entries in logical palette
 742  *    Failure: GDI_ERROR
 743  */
 744 UINT32 WINAPI RealizePalette32(
 745     HDC32 hDC) /* [in] Handle of device context */
 746 {
 747     UINT32 realized = GDIRealizePalette( hDC );
 748
 749     /* do not send anything if no colors were changed */
 750
 751     if( IsDCCurrentPalette( hDC ) && realized &&
 752         !(COLOR_GetSystemPaletteFlags() & COLOR_VIRTUAL) )
 753     {
 754         /* Send palette change notification */
 755
 756         HWND32 hWnd;
 757         if( (hWnd = WindowFromDC32( hDC )) )
 758             SendMessage16( HWND_BROADCAST, WM_PALETTECHANGED, hWnd, 0L);
 759     }
 760     return realized;
 761 }
 762
 763
 764 /**********************************************************************
 765  *            UpdateColors16   (GDI.366)
 766  */
 767 INT16 WINAPI UpdateColors16( HDC16 hDC )
 768 {
 769     HWND32 hWnd = WindowFromDC32( hDC );
 770
 771     /* Docs say that we have to remap current drawable pixel by pixel
 772      * but it would take forever given the speed of XGet/PutPixel.
 773      */
 774     if (hWnd && !(COLOR_GetSystemPaletteFlags() & COLOR_VIRTUAL) )
 775         InvalidateRect32( hWnd, NULL, FALSE );
 776     return 0x666;
 777 }
 778
 779
 780 /**********************************************************************
 781  * UpdateColors32 [GDI32.359]  Remaps current colors to logical palette
 782  *
 783  * RETURNS
 784  *    Success: TRUE
 785  *    Failure: FALSE
 786  */
 787 BOOL32 WINAPI UpdateColors32(
 788     HDC32 hDC) /* [in] Handle of device context */
 789 {
 790     UpdateColors16( hDC );
 791     return TRUE;
 792 }
 793