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 "wine/winuser16.h"
  16 #include "gdi.h"
  17 #include "color.h"
  18 #include "palette.h"
  19 #include "xmalloc.h"
  20 #include "debugtools.h"
  21 #include "winerror.h"
  22
  23 DEFAULT_DEBUG_CHANNEL(palette)
  24
  25 PALETTE_DRIVER *PALETTE_Driver = NULL;
  26
  27 FARPROC pfnSelectPalette = NULL;
  28 FARPROC pfnRealizePalette = NULL;
  29
  30 static UINT SystemPaletteUse = SYSPAL_STATIC;  /* currently not considered */
  31
  32 static HPALETTE16 hPrimaryPalette = 0; /* used for WM_PALETTECHANGED */
  33 static HPALETTE16 hLastRealizedPalette = 0; /* UnrealizeObject() needs it */
  34
  35
  36 /***********************************************************************
  37  *           PALETTE_Init
  38  *
  39  * Create the system palette.
  40  */
  41 HPALETTE16 PALETTE_Init(void)
  42 {
  43     int                 i;
  44     HPALETTE16          hpalette;
  45     LOGPALETTE *        palPtr;
  46     PALETTEOBJ*         palObj;
  47     const PALETTEENTRY* __sysPalTemplate = COLOR_GetSystemPaletteTemplate();
  48
  49     /* create default palette (20 system colors) */
  50
  51     palPtr = HeapAlloc( GetProcessHeap(), 0,
  52              sizeof(LOGPALETTE) + (NB_RESERVED_COLORS-1)*sizeof(PALETTEENTRY));
  53     if (!palPtr) return FALSE;
  54
  55     palPtr->palVersion = 0x300;
  56     palPtr->palNumEntries = NB_RESERVED_COLORS;
  57     for( i = 0; i < NB_RESERVED_COLORS; i ++ )
  58     {
  59         palPtr->palPalEntry[i].peRed = __sysPalTemplate[i].peRed;
  60         palPtr->palPalEntry[i].peGreen = __sysPalTemplate[i].peGreen;
  61         palPtr->palPalEntry[i].peBlue = __sysPalTemplate[i].peBlue;
  62         palPtr->palPalEntry[i].peFlags = 0;
  63     }
  64     hpalette = CreatePalette16( palPtr );
  65
  66     palObj = (PALETTEOBJ*) GDI_GetObjPtr( hpalette, PALETTE_MAGIC );
  67     if (palObj)
  68     {
  69         palObj->mapping = xmalloc( sizeof(int) * 20 );
  70
  71         GDI_HEAP_UNLOCK( hpalette );
  72
  73         HeapFree( GetProcessHeap(), 0, palPtr );
  74     }
  75
  76     return hpalette;
  77 }
  78
  79 /***********************************************************************
  80  *           PALETTE_ValidateFlags
  81  */
  82 void PALETTE_ValidateFlags(PALETTEENTRY* lpPalE, int size)
  83 {
  84     int i = 0;
  85     for( ; i<size ; i++ )
  86         lpPalE[i].peFlags = PC_SYS_USED | (lpPalE[i].peFlags & 0x07);
  87 }
  88
  89
  90 /***********************************************************************
  91  *           CreatePalette16    (GDI.360)
  92  */
  93 HPALETTE16 WINAPI CreatePalette16( const LOGPALETTE* palette )
  94 {
  95     return CreatePalette( palette );
  96 }
  97
  98
  99 /***********************************************************************
 100  * CreatePalette32 [GDI32.53]  Creates a logical color palette
 101  *
 102  * RETURNS
 103  *    Success: Handle to logical palette
 104  *    Failure: NULL
 105  */
 106 HPALETTE WINAPI CreatePalette(
 107     const LOGPALETTE* palette) /* [in] Pointer to logical color palette */
 108 {
 109     PALETTEOBJ * palettePtr;
 110     HPALETTE hpalette;
 111     int size;
 112
 113     if (!palette) return 0;
 114     TRACE("entries=%i\n", palette->palNumEntries);
 115
 116     size = sizeof(LOGPALETTE) + (palette->palNumEntries - 1) * sizeof(PALETTEENTRY);
 117
 118     hpalette = GDI_AllocObject( size + sizeof(int*) +sizeof(GDIOBJHDR) , PALETTE_MAGIC );
 119     if (!hpalette) return 0;
 120
 121     palettePtr = (PALETTEOBJ *) GDI_HEAP_LOCK( hpalette );
 122     memcpy( &palettePtr->logpalette, palette, size );
 123     PALETTE_ValidateFlags(palettePtr->logpalette.palPalEntry,
 124                           palettePtr->logpalette.palNumEntries);
 125     palettePtr->mapping = NULL;
 126     GDI_HEAP_UNLOCK( hpalette );
 127
 128     TRACE("   returning %04x\n", hpalette);
 129     return hpalette;
 130 }
 131
 132
 133 /***********************************************************************
 134  * CreateHalftonePalette16 [GDI.?]  Creates a halftone palette
 135  *
 136  * RETURNS
 137  *    Success: Handle to logical halftone palette
 138  *    Failure: 0
 139  */
 140 HPALETTE16 WINAPI CreateHalftonePalette16(
 141     HDC16 hdc) /* [in] Handle to device context */
 142 {
 143     return CreateHalftonePalette(hdc);
 144 }
 145
 146
 147 /***********************************************************************
 148  * CreateHalftonePalette32 [GDI32.47]  Creates a halftone palette
 149  *
 150  * RETURNS
 151  *    Success: Handle to logical halftone palette
 152  *    Failure: 0
 153  *
 154  * FIXME: not truly tested
 155  */
 156 HPALETTE WINAPI CreateHalftonePalette(
 157     HDC hdc) /* [in] Handle to device context */
 158 {
 159     int i, r, g, b;
 160     struct {
 161         WORD Version;
 162         WORD NumberOfEntries;
 163         PALETTEENTRY aEntries[256];
 164     } Palette = {
 165         0x300, 256
 166     };
 167
 168     GetSystemPaletteEntries(hdc, 0, 256, Palette.aEntries);
 169     return CreatePalette((LOGPALETTE *)&Palette);
 170
 171     for (r = 0; r < 6; r++) {
 172         for (g = 0; g < 6; g++) {
 173             for (b = 0; b < 6; b++) {
 174                 i = r + g*6 + b*36 + 10;
 175                 Palette.aEntries[i].peRed = r * 51;
 176                 Palette.aEntries[i].peGreen = g * 51;
 177                 Palette.aEntries[i].peBlue = b * 51;
 178             }
 179           }
 180         }
 181
 182     for (i = 216; i < 246; i++) {
 183         int v = (i - 216) * 8;
 184         Palette.aEntries[i].peRed = v;
 185         Palette.aEntries[i].peGreen = v;
 186         Palette.aEntries[i].peBlue = v;
 187         }
 188
 189     return CreatePalette((LOGPALETTE *)&Palette);
 190 }
 191
 192
 193 /***********************************************************************
 194  *           GetPaletteEntries16    (GDI.363)
 195  */
 196 UINT16 WINAPI GetPaletteEntries16( HPALETTE16 hpalette, UINT16 start,
 197                                    UINT16 count, LPPALETTEENTRY entries )
 198 {
 199     return GetPaletteEntries( hpalette, start, count, entries );
 200 }
 201
 202
 203 /***********************************************************************
 204  * GetPaletteEntries32 [GDI32.209]  Retrieves palette entries
 205  *
 206  * RETURNS
 207  *    Success: Number of entries from logical palette
 208  *    Failure: 0
 209  */
 210 UINT WINAPI GetPaletteEntries(
 211     HPALETTE hpalette,    /* [in]  Handle of logical palette */
 212     UINT start,           /* [in]  First entry to receive */
 213     UINT count,           /* [in]  Number of entries to receive */
 214     LPPALETTEENTRY entries) /* [out] Address of array receiving entries */
 215 {
 216     PALETTEOBJ * palPtr;
 217     INT numEntries;
 218
 219     TRACE("hpal = %04x, count=%i\n", hpalette, count );
 220
 221     palPtr = (PALETTEOBJ *) GDI_GetObjPtr( hpalette, PALETTE_MAGIC );
 222     if (!palPtr) return 0;
 223
 224     numEntries = palPtr->logpalette.palNumEntries;
 225     if (start+count > numEntries) count = numEntries - start;
 226     if (entries)
 227     {
 228       if (start >= numEntries)
 229       {
 230         GDI_HEAP_UNLOCK( hpalette );
 231         return 0;
 232       }
 233       memcpy( entries, &palPtr->logpalette.palPalEntry[start],
 234               count * sizeof(PALETTEENTRY) );
 235       for( numEntries = 0; numEntries < count ; numEntries++ )
 236            if (entries[numEntries].peFlags & 0xF0)
 237                entries[numEntries].peFlags = 0;
 238       GDI_HEAP_UNLOCK( hpalette );
 239     }
 240
 241     return count;
 242 }
 243
 244
 245 /***********************************************************************
 246  *           SetPaletteEntries16    (GDI.364)
 247  */
 248 UINT16 WINAPI SetPaletteEntries16( HPALETTE16 hpalette, UINT16 start,
 249                                    UINT16 count, LPPALETTEENTRY entries )
 250 {
 251     return SetPaletteEntries( hpalette, start, count, entries );
 252 }
 253
 254
 255 /***********************************************************************
 256  * SetPaletteEntries32 [GDI32.326]  Sets color values for range in palette
 257  *
 258  * RETURNS
 259  *    Success: Number of entries that were set
 260  *    Failure: 0
 261  */
 262 UINT WINAPI SetPaletteEntries(
 263     HPALETTE hpalette,    /* [in] Handle of logical palette */
 264     UINT start,           /* [in] Index of first entry to set */
 265     UINT count,           /* [in] Number of entries to set */
 266     LPPALETTEENTRY entries) /* [in] Address of array of structures */
 267 {
 268     PALETTEOBJ * palPtr;
 269     INT numEntries;
 270
 271     TRACE("hpal=%04x,start=%i,count=%i\n",hpalette,start,count );
 272
 273     palPtr = (PALETTEOBJ *) GDI_GetObjPtr( hpalette, PALETTE_MAGIC );
 274     if (!palPtr) return 0;
 275
 276     numEntries = palPtr->logpalette.palNumEntries;
 277     if (start >= numEntries)
 278     {
 279       GDI_HEAP_UNLOCK( hpalette );
 280       return 0;
 281     }
 282     if (start+count > numEntries) count = numEntries - start;
 283     memcpy( &palPtr->logpalette.palPalEntry[start], entries,
 284             count * sizeof(PALETTEENTRY) );
 285     PALETTE_ValidateFlags(palPtr->logpalette.palPalEntry,
 286                           palPtr->logpalette.palNumEntries);
 287     free(palPtr->mapping);
 288     palPtr->mapping = NULL;
 289     GDI_HEAP_UNLOCK( hpalette );
 290     return count;
 291 }
 292
 293
 294 /***********************************************************************
 295  *           ResizePalette16   (GDI.368)
 296  */
 297 BOOL16 WINAPI ResizePalette16( HPALETTE16 hPal, UINT16 cEntries )
 298 {
 299     return ResizePalette( hPal, cEntries );
 300 }
 301
 302
 303 /***********************************************************************
 304  * ResizePalette32 [GDI32.289]  Resizes logical palette
 305  *
 306  * RETURNS
 307  *    Success: TRUE
 308  *    Failure: FALSE
 309  */
 310 BOOL WINAPI ResizePalette(
 311     HPALETTE hPal, /* [in] Handle of logical palette */
 312     UINT cEntries) /* [in] Number of entries in logical palette */
 313 {
 314     PALETTEOBJ * palPtr = (PALETTEOBJ *) GDI_GetObjPtr( hPal, PALETTE_MAGIC );
 315     UINT         cPrevEnt, prevVer;
 316     int          prevsize, size = sizeof(LOGPALETTE) + (cEntries - 1) * sizeof(PALETTEENTRY);
 317     int*         mapping = NULL;
 318
 319     TRACE("hpal = %04x, prev = %i, new = %i\n",
 320                     hPal, palPtr ? palPtr->logpalette.palNumEntries : -1,
 321                     cEntries );
 322     if( !palPtr ) return FALSE;
 323     cPrevEnt = palPtr->logpalette.palNumEntries;
 324     prevVer = palPtr->logpalette.palVersion;
 325     prevsize = sizeof(LOGPALETTE) + (cPrevEnt - 1) * sizeof(PALETTEENTRY) +
 326                                         sizeof(int*) + sizeof(GDIOBJHDR);
 327     size += sizeof(int*) + sizeof(GDIOBJHDR);
 328     mapping = palPtr->mapping;
 329
 330     GDI_HEAP_UNLOCK( hPal );
 331
 332     hPal = GDI_HEAP_REALLOC( hPal, size );
 333     palPtr = (PALETTEOBJ *) GDI_GetObjPtr( hPal, PALETTE_MAGIC );
 334     if( !palPtr ) return FALSE;
 335
 336     if( mapping )
 337         palPtr->mapping = (int*) xrealloc( mapping, cEntries * sizeof(int) );
 338     if( cEntries > cPrevEnt )
 339     {
 340         if( mapping )
 341             memset(palPtr->mapping + cPrevEnt, 0, (cEntries - cPrevEnt)*sizeof(int));
 342         memset( (BYTE*)palPtr + prevsize, 0, size - prevsize );
 343         PALETTE_ValidateFlags((PALETTEENTRY*)((BYTE*)palPtr + prevsize),
 344                                                      cEntries - cPrevEnt );
 345     }
 346     palPtr->logpalette.palNumEntries = cEntries;
 347     palPtr->logpalette.palVersion = prevVer;
 348     GDI_HEAP_UNLOCK( hPal );
 349     return TRUE;
 350 }
 351
 352
 353 /***********************************************************************
 354  *           AnimatePalette16   (GDI.367)
 355  */
 356 void WINAPI AnimatePalette16( HPALETTE16 hPal, UINT16 StartIndex,
 357                               UINT16 NumEntries, const PALETTEENTRY* PaletteColors)
 358 {
 359     AnimatePalette( hPal, StartIndex, NumEntries, PaletteColors );
 360 }
 361
 362
 363 /***********************************************************************
 364  * AnimatePalette32 [GDI32.6]  Replaces entries in logical palette
 365  *
 366  * RETURNS
 367  *    Success: TRUE
 368  *    Failure: FALSE
 369  *
 370  * FIXME
 371  *    Should use existing mapping when animating a primary palette
 372  */
 373 BOOL WINAPI AnimatePalette(
 374     HPALETTE hPal,              /* [in] Handle to logical palette */
 375     UINT StartIndex,            /* [in] First entry in palette */
 376     UINT NumEntries,            /* [in] Count of entries in palette */
 377     const PALETTEENTRY* PaletteColors) /* [in] Pointer to first replacement */
 378 {
 379     TRACE("%04x (%i - %i)\n", hPal, StartIndex,StartIndex+NumEntries);
 380
 381     if( hPal != STOCK_DEFAULT_PALETTE )
 382     {
 383         PALETTEOBJ* palPtr = (PALETTEOBJ *)GDI_GetObjPtr(hPal, PALETTE_MAGIC);
 384         if (!palPtr) return FALSE;
 385
 386         if( (StartIndex + NumEntries) <= palPtr->logpalette.palNumEntries )
 387         {
 388             UINT u;
 389             for( u = 0; u < NumEntries; u++ )
 390                 palPtr->logpalette.palPalEntry[u + StartIndex] = PaletteColors[u];
 391             PALETTE_Driver->
 392               pSetMapping(palPtr, StartIndex, NumEntries,
 393                           hPal != hPrimaryPalette );
 394             GDI_HEAP_UNLOCK( hPal );
 395             return TRUE;
 396         }
 397     }
 398     return FALSE;
 399 }
 400
 401
 402 /***********************************************************************
 403  *           SetSystemPaletteUse16   (GDI.373)
 404  */
 405 UINT16 WINAPI SetSystemPaletteUse16( HDC16 hdc, UINT16 use )
 406 {
 407     return SetSystemPaletteUse( hdc, use );
 408 }
 409
 410
 411 /***********************************************************************
 412  * SetSystemPaletteUse32 [GDI32.335]
 413  *
 414  * RETURNS
 415  *    Success: Previous system palette
 416  *    Failure: SYSPAL_ERROR
 417  */
 418 UINT WINAPI SetSystemPaletteUse(
 419     HDC hdc,  /* [in] Handle of device context */
 420     UINT use) /* [in] Palette-usage flag */
 421 {
 422     UINT old = SystemPaletteUse;
 423     FIXME("(%04x,%04x): stub\n", hdc, use );
 424     SystemPaletteUse = use;
 425     return old;
 426 }
 427
 428
 429 /***********************************************************************
 430  *           GetSystemPaletteUse16   (GDI.374)
 431  */
 432 UINT16 WINAPI GetSystemPaletteUse16( HDC16 hdc )
 433 {
 434     return SystemPaletteUse;
 435 }
 436
 437
 438 /***********************************************************************
 439  * GetSystemPaletteUse32 [GDI32.223]  Gets state of system palette
 440  *
 441  * RETURNS
 442  *    Current state of system palette
 443  */
 444 UINT WINAPI GetSystemPaletteUse(
 445     HDC hdc) /* [in] Handle of device context */
 446 {
 447     return SystemPaletteUse;
 448 }
 449
 450
 451 /***********************************************************************
 452  *           GetSystemPaletteEntries16   (GDI.375)
 453  */
 454 UINT16 WINAPI GetSystemPaletteEntries16( HDC16 hdc, UINT16 start, UINT16 count,
 455                                          LPPALETTEENTRY entries )
 456 {
 457     return GetSystemPaletteEntries( hdc, start, count, entries );
 458 }
 459
 460
 461 /***********************************************************************
 462  * GetSystemPaletteEntries32 [GDI32.222]  Gets range of palette entries
 463  *
 464  * RETURNS
 465  *    Success: Number of entries retrieved from palette
 466  *    Failure: 0
 467  */
 468 UINT WINAPI GetSystemPaletteEntries(
 469     HDC hdc,              /* [in]  Handle of device context */
 470     UINT start,           /* [in]  Index of first entry to be retrieved */
 471     UINT count,           /* [in]  Number of entries to be retrieved */
 472     LPPALETTEENTRY entries) /* [out] Array receiving system-palette entries */
 473 {
 474     UINT i;
 475     DC *dc;
 476
 477     TRACE("hdc=%04x,start=%i,count=%i\n", hdc,start,count);
 478
 479     if (!(dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC ))) return 0;
 480     if (!entries) return dc->w.devCaps->sizePalette;
 481     if (start >= dc->w.devCaps->sizePalette)
 482       {
 483         GDI_HEAP_UNLOCK( hdc );
 484         return 0;
 485       }
 486     if (start+count >= dc->w.devCaps->sizePalette)
 487         count = dc->w.devCaps->sizePalette - start;
 488     for (i = 0; i < count; i++)
 489     {
 490         *(COLORREF*)(entries + i) = COLOR_GetSystemPaletteEntry( start + i );
 491
 492         TRACE("\tidx(%02x) -> RGB(%08lx)\n",
 493                          start + i, *(COLORREF*)(entries + i) );
 494     }
 495     GDI_HEAP_UNLOCK( hdc );
 496     return count;
 497 }
 498
 499
 500 /***********************************************************************
 501  *           GetNearestPaletteIndex16   (GDI.370)
 502  */
 503 UINT16 WINAPI GetNearestPaletteIndex16( HPALETTE16 hpalette, COLORREF color )
 504 {
 505     return GetNearestPaletteIndex( hpalette, color );
 506 }
 507
 508
 509 /***********************************************************************
 510  * GetNearestPaletteIndex32 [GDI32.203]  Gets palette index for color
 511  *
 512  * NOTES
 513  *    Should index be initialized to CLR_INVALID instead of 0?
 514  *
 515  * RETURNS
 516  *    Success: Index of entry in logical palette
 517  *    Failure: CLR_INVALID
 518  */
 519 UINT WINAPI GetNearestPaletteIndex(
 520     HPALETTE hpalette, /* [in] Handle of logical color palette */
 521     COLORREF color)      /* [in] Color to be matched */
 522 {
 523     PALETTEOBJ* palObj = (PALETTEOBJ*)GDI_GetObjPtr( hpalette, PALETTE_MAGIC );
 524     UINT index  = 0;
 525
 526     if( palObj )
 527       index = COLOR_PaletteLookupPixel(palObj->logpalette.palPalEntry,
 528                                        palObj->logpalette.palNumEntries,
 529                                        NULL, color, FALSE );
 530
 531     TRACE("(%04x,%06lx): returning %d\n", hpalette, color, index );
 532     GDI_HEAP_UNLOCK( hpalette );
 533     return index;
 534 }
 535
 536
 537 /***********************************************************************
 538  *           GetNearestColor16   (GDI.154)
 539  */
 540 COLORREF WINAPI GetNearestColor16( HDC16 hdc, COLORREF color )
 541 {
 542     return GetNearestColor( hdc, color );
 543 }
 544
 545
 546 /***********************************************************************
 547  * GetNearestColor32 [GDI32.202]  Gets a system color to match
 548  *
 549  * NOTES
 550  *    Should this return CLR_INVALID instead of FadeCafe?
 551  *
 552  * RETURNS
 553  *    Success: Color from system palette that corresponds to given color
 554  *    Failure: CLR_INVALID
 555  */
 556 COLORREF WINAPI GetNearestColor(
 557     HDC hdc,      /* [in] Handle of device context */
 558     COLORREF color) /* [in] Color to be matched */
 559 {
 560     COLORREF     nearest = 0xFADECAFE;
 561     DC          *dc;
 562     PALETTEOBJ  *palObj;
 563
 564     if ( (dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC )) )
 565     {
 566       palObj = (PALETTEOBJ*)
 567                 GDI_GetObjPtr( (dc->w.hPalette)? dc->w.hPalette
 568                                                : STOCK_DEFAULT_PALETTE, PALETTE_MAGIC );
 569       if (!palObj) return nearest;
 570
 571       nearest = COLOR_LookupNearestColor( palObj->logpalette.palPalEntry,
 572                                           palObj->logpalette.palNumEntries, color );
 573       GDI_HEAP_UNLOCK( dc->w.hPalette );
 574     }
 575
 576     TRACE("(%06lx): returning %06lx\n", color, nearest );
 577     GDI_HEAP_UNLOCK( hdc );
 578     return nearest;
 579 }
 580
 581
 582 /***********************************************************************
 583  *           PALETTE_GetObject
 584  */
 585 int PALETTE_GetObject( PALETTEOBJ * palette, int count, LPSTR buffer )
 586 {
 587     if (count > sizeof(WORD)) count = sizeof(WORD);
 588     memcpy( buffer, &palette->logpalette.palNumEntries, count );
 589     return count;
 590 }
 591
 592
 593 /***********************************************************************
 594  *           PALETTE_UnrealizeObject
 595  */
 596 BOOL PALETTE_UnrealizeObject( HPALETTE16 hpalette, PALETTEOBJ *palette )
 597 {
 598     if (palette->mapping)
 599     {
 600         free( palette->mapping );
 601         palette->mapping = NULL;
 602     }
 603     if (hLastRealizedPalette == hpalette) hLastRealizedPalette = 0;
 604     return TRUE;
 605 }
 606
 607
 608 /***********************************************************************
 609  *           PALETTE_DeleteObject
 610  */
 611 BOOL PALETTE_DeleteObject( HPALETTE16 hpalette, PALETTEOBJ *palette )
 612 {
 613     free( palette->mapping );
 614     if (hLastRealizedPalette == hpalette) hLastRealizedPalette = 0;
 615     return GDI_FreeObject( hpalette );
 616 }
 617
 618
 619 /***********************************************************************
 620  *           GDISelectPalette    (GDI.361)
 621  */
 622 HPALETTE16 WINAPI GDISelectPalette16( HDC16 hdc, HPALETTE16 hpal, WORD wBkg)
 623 {
 624     HPALETTE16 prev;
 625     DC *dc;
 626
 627     TRACE("%04x %04x\n", hdc, hpal );
 628
 629     dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
 630     if (!dc)
 631     {
 632         dc = (DC *)GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
 633         if (!dc) return 0;
 634     }
 635     prev = dc->w.hPalette;
 636     dc->w.hPalette = hpal;
 637     GDI_HEAP_UNLOCK( hdc );
 638     if (!wBkg) hPrimaryPalette = hpal;
 639     return prev;
 640 }
 641
 642
 643 /***********************************************************************
 644  *           GDIRealizePalette    (GDI.362)
 645  */
 646 UINT16 WINAPI GDIRealizePalette16( HDC16 hdc )
 647 {
 648     PALETTEOBJ* palPtr;
 649     int realized = 0;
 650     DC*         dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
 651     if (!dc)
 652     {
 653         dc = (DC *)GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
 654         if (!dc) return 0;
 655     }
 656
 657     TRACE("%04x...\n", hdc );
 658
 659     if( dc &&  dc->w.hPalette != hLastRealizedPalette )
 660     {
 661         if( dc->w.hPalette == STOCK_DEFAULT_PALETTE )
 662             return RealizeDefaultPalette16( hdc );
 663
 664         palPtr = (PALETTEOBJ *) GDI_GetObjPtr( dc->w.hPalette, PALETTE_MAGIC );
 665
 666         if (!palPtr) {
 667                 FIXME("invalid selected palette %04x\n",dc->w.hPalette);
 668                 return 0;
 669         }
 670
 671         realized = PALETTE_Driver->
 672           pSetMapping(palPtr,0,palPtr->logpalette.palNumEntries,
 673                       (dc->w.hPalette != hPrimaryPalette) ||
 674                       (dc->w.hPalette == STOCK_DEFAULT_PALETTE));
 675         GDI_HEAP_UNLOCK( dc->w.hPalette );
 676         hLastRealizedPalette = dc->w.hPalette;
 677     }
 678     else TRACE("  skipping (hLastRealizedPalette = %04x)\n",
 679                          hLastRealizedPalette);
 680     GDI_HEAP_UNLOCK( hdc );
 681
 682     TRACE("   realized %i colors.\n", realized );
 683     return (UINT16)realized;
 684 }
 685
 686
 687 /***********************************************************************
 688  *           RealizeDefaultPalette    (GDI.365)
 689  */
 690 UINT16 WINAPI RealizeDefaultPalette16( HDC16 hdc )
 691 {
 692     DC          *dc;
 693     PALETTEOBJ*  palPtr;
 694
 695     TRACE("%04x\n", hdc );
 696
 697     dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
 698     if (!dc)
 699     {
 700         dc = (DC *)GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
 701         if (!dc) return 0;
 702     }
 703
 704     if ( dc->w.flags & DC_MEMORY )
 705       {
 706         GDI_HEAP_UNLOCK( hdc );
 707         return 0;
 708       }
 709
 710     hPrimaryPalette = STOCK_DEFAULT_PALETTE;
 711     hLastRealizedPalette = STOCK_DEFAULT_PALETTE;
 712
 713     palPtr = (PALETTEOBJ*)GDI_GetObjPtr(STOCK_DEFAULT_PALETTE, PALETTE_MAGIC );
 714     if (!palPtr) return 0;
 715
 716     /* lookup is needed to account for SetSystemPaletteUse() stuff */
 717
 718     return PALETTE_Driver->pUpdateMapping(palPtr);
 719 }
 720
 721 /***********************************************************************
 722  *           IsDCCurrentPalette   (GDI.412)
 723  */
 724 BOOL16 WINAPI IsDCCurrentPalette16(HDC16 hDC)
 725 {
 726     DC* dc = (DC *)GDI_GetObjPtr( hDC, DC_MAGIC );
 727     if (dc)
 728     {
 729       GDI_HEAP_UNLOCK( hDC );
 730       return dc->w.hPalette == hPrimaryPalette;
 731     }
 732     return FALSE;
 733 }
 734
 735
 736 /***********************************************************************
 737  *           SelectPalette16    (USER.282)
 738  */
 739 HPALETTE16 WINAPI SelectPalette16( HDC16 hDC, HPALETTE16 hPal,
 740                                    BOOL16 bForceBackground )
 741 {
 742     return SelectPalette( hDC, hPal, bForceBackground );
 743 }
 744
 745
 746 /***********************************************************************
 747  * SelectPalette32 [GDI32.300]  Selects logical palette into DC
 748  *
 749  * RETURNS
 750  *    Success: Previous logical palette
 751  *    Failure: NULL
 752  */
 753 HPALETTE WINAPI SelectPalette(
 754     HDC hDC,               /* [in] Handle of device context */
 755     HPALETTE hPal,         /* [in] Handle of logical color palette */
 756     BOOL bForceBackground) /* [in] Foreground/background mode */
 757 {
 758     WORD        wBkgPalette = 1;
 759     PALETTEOBJ* lpt = (PALETTEOBJ*) GDI_GetObjPtr( hPal, PALETTE_MAGIC );
 760
 761     TRACE("dc=%04x,pal=%04x,force=%i\n", hDC, hPal, bForceBackground);
 762     if( !lpt ) return 0;
 763
 764     TRACE(" entries = %d\n", lpt->logpalette.palNumEntries);
 765     GDI_HEAP_UNLOCK( hPal );
 766
 767     if( hPal != STOCK_DEFAULT_PALETTE )
 768     {
 769         HWND hWnd = WindowFromDC( hDC );
 770         HWND hActive = GetActiveWindow();
 771
 772         /* set primary palette if it's related to current active */
 773
 774         if((!hWnd || (hActive == hWnd || IsChild16(hActive,hWnd))) &&
 775             !bForceBackground )
 776             wBkgPalette = 0;
 777     }
 778     return GDISelectPalette16( hDC, hPal, wBkgPalette);
 779 }
 780
 781
 782 /***********************************************************************
 783  *           RealizePalette16    (USER.283)
 784  */
 785 UINT16 WINAPI RealizePalette16( HDC16 hDC )
 786 {
 787     return RealizePalette( hDC );
 788 }
 789
 790
 791 /***********************************************************************
 792  * RealizePalette32 [GDI32.280]  Maps palette entries to system palette
 793  *
 794  * RETURNS
 795  *    Success: Number of entries in logical palette
 796  *    Failure: GDI_ERROR
 797  */
 798 UINT WINAPI RealizePalette(
 799     HDC hDC) /* [in] Handle of device context */
 800 {
 801     DC *dc;
 802     UINT realized;
 803
 804     if (!(dc = (DC *) GDI_GetObjPtr( hDC, DC_MAGIC ))) return 0;
 805
 806     realized = GDIRealizePalette16( hDC );
 807
 808     /* do not send anything if no colors were changed */
 809
 810     if( IsDCCurrentPalette16( hDC ) && realized &&
 811         dc->w.devCaps->sizePalette )
 812     {
 813         /* Send palette change notification */
 814
 815         HWND hWnd;
 816         if( (hWnd = WindowFromDC( hDC )) )
 817             SendMessage16( HWND_BROADCAST, WM_PALETTECHANGED, hWnd, 0L);
 818     }
 819
 820     GDI_HEAP_UNLOCK( hDC );
 821     return realized;
 822 }
 823
 824
 825 /**********************************************************************
 826  *            UpdateColors16   (GDI.366)
 827  */
 828 INT16 WINAPI UpdateColors16( HDC16 hDC )
 829 {
 830     DC *dc;
 831     HWND hWnd;
 832
 833     if (!(dc = (DC *) GDI_GetObjPtr( hDC, DC_MAGIC ))) return 0;
 834
 835     hWnd = WindowFromDC( hDC );
 836
 837     /* Docs say that we have to remap current drawable pixel by pixel
 838      * but it would take forever given the speed of XGet/PutPixel.
 839      */
 840     if (hWnd && dc->w.devCaps->sizePalette )
 841         InvalidateRect( hWnd, NULL, FALSE );
 842
 843     GDI_HEAP_UNLOCK( hDC );
 844
 845     return 0x666;
 846 }
 847
 848
 849 /**********************************************************************
 850  * UpdateColors32 [GDI32.359]  Remaps current colors to logical palette
 851  *
 852  * RETURNS
 853  *    Success: TRUE
 854  *    Failure: FALSE
 855  */
 856 BOOL WINAPI UpdateColors(
 857     HDC hDC) /* [in] Handle of device context */
 858 {
 859     UpdateColors16( hDC );
 860     return TRUE;
 861 }
 862
 863
 864 /*********************************************************************
 865  *           SetMagicColors16   (GDI.606)
 866  */
 867 VOID WINAPI SetMagicColors16(HDC16 hDC, COLORREF color, UINT16 index)
 868 {
 869     FIXME("(hDC %04x, color %04x, index %04x): stub\n", hDC, (int)color, index);
 870
 871 }
 872
 873 /**********************************************************************
 874  * GetICMProfileA [GDI32.316]
 875  *
 876  * Returns the filename of the specified device context's color
 877  * management profile, even if color management is not enabled
 878  * for that DC.
 879  *
 880  * RETURNS
 881  *    TRUE if name copied succesfully OR lpszFilename is NULL
 882  *    FALSE if the buffer length pointed to by lpcbName is too small
 883  *
 884  * NOTE
 885  *    The buffer length pointed to by lpcbName is ALWAYS updated to
 886  *    the length required regardless of other actions this function
 887  *    may take.
 888  *
 889  * FIXME
 890  *    How does Windows assign these?  Some registry key?
 891  */
 892
 893 #define WINEICM "winefake.icm"  /* easy-to-identify fake filename */
 894
 895 BOOL WINAPI GetICMProfileA(HDC hDC, LPDWORD lpcbName, LPSTR lpszFilename)
 896 {
 897     DWORD callerLen;
 898
 899     FIXME("(%04x, %p, %p): partial stub\n", hDC, lpcbName, lpszFilename);
 900
 901     callerLen = *lpcbName;
 902
 903     /* all 3 behaviors require the required buffer size to be set */
 904     *lpcbName = strlen(WINEICM);
 905
 906     /* behavior 1: if lpszFilename is NULL, return size of string and no error */
 907     if ((DWORD)lpszFilename == (DWORD)0x00000000)
 908         return TRUE;
 909
 910     /* behavior 2: if buffer size too small, return size of string and error */
 911     if (callerLen < strlen(WINEICM))
 912     {
 913         SetLastError(ERROR_INSUFFICIENT_BUFFER);
 914         return FALSE;
 915     }
 916
 917     /* behavior 3: if buffer size OK and pointer not NULL, copy and return size */
 918     lstrcpyA(lpszFilename, WINEICM);
 919     return TRUE;
 920 }