objects/palette.c

   1 /*
   2  * GDI palette objects
   3  *
   4  * Copyright 1993,1994 Alexandre Julliard
   5  * Copyright 1996 Alex Korobka
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  * NOTES:
  22  * PALETTEOBJ is documented in the Dr. Dobbs Journal May 1993.
  23  * Information in the "Undocumented Windows" is incorrect.
  24  */
  25
  26 #include <stdlib.h>
  27 #include <string.h>
  28
  29 #include "winbase.h"
  30 #include "windef.h"
  31 #include "wingdi.h"
  32 #include "wownt32.h"
  33 #include "wine/winuser16.h"
  34 #include "gdi.h"
  35 #include "palette.h"
  36 #include "wine/debug.h"
  37 #include "winerror.h"
  38
  39 WINE_DEFAULT_DEBUG_CHANNEL(palette);
  40
  41 static INT PALETTE_GetObject( HGDIOBJ handle, void *obj, INT count, LPVOID buffer );
  42 static BOOL PALETTE_UnrealizeObject( HGDIOBJ handle, void *obj );
  43 static BOOL PALETTE_DeleteObject( HGDIOBJ handle, void *obj );
  44
  45 static const struct gdi_obj_funcs palette_funcs =
  46 {
  47     NULL,                     /* pSelectObject */
  48     PALETTE_GetObject,        /* pGetObject16 */
  49     PALETTE_GetObject,        /* pGetObjectA */
  50     PALETTE_GetObject,        /* pGetObjectW */
  51     PALETTE_UnrealizeObject,  /* pUnrealizeObject */
  52     PALETTE_DeleteObject      /* pDeleteObject */
  53 };
  54
  55 /* Pointers to USER implementation of SelectPalette/RealizePalette */
  56 /* they will be patched by USER on startup */
  57 HPALETTE (WINAPI *pfnSelectPalette)(HDC hdc, HPALETTE hpal, WORD bkgnd ) = GDISelectPalette;
  58 UINT (WINAPI *pfnRealizePalette)(HDC hdc) = GDIRealizePalette;
  59
  60 static UINT SystemPaletteUse = SYSPAL_STATIC;  /* currently not considered */
  61
  62 static HPALETTE hPrimaryPalette = 0; /* used for WM_PALETTECHANGED */
  63 static HPALETTE hLastRealizedPalette = 0; /* UnrealizeObject() needs it */
  64 static const DC_FUNCTIONS *pLastRealizedDC;
  65
  66 static const PALETTEENTRY sys_pal_template[NB_RESERVED_COLORS] =
  67 {
  68     /* first 10 entries in the system palette */
  69     /* red  green blue  flags */
  70     { 0x00, 0x00, 0x00, 0 },
  71     { 0x80, 0x00, 0x00, 0 },
  72     { 0x00, 0x80, 0x00, 0 },
  73     { 0x80, 0x80, 0x00, 0 },
  74     { 0x00, 0x00, 0x80, 0 },
  75     { 0x80, 0x00, 0x80, 0 },
  76     { 0x00, 0x80, 0x80, 0 },
  77     { 0xc0, 0xc0, 0xc0, 0 },
  78     { 0xc0, 0xdc, 0xc0, 0 },
  79     { 0xa6, 0xca, 0xf0, 0 },
  80
  81     /* ... c_min/2 dynamic colorcells */
  82
  83     /* ... gap (for sparse palettes) */
  84
  85     /* ... c_min/2 dynamic colorcells */
  86
  87     { 0xff, 0xfb, 0xf0, 0 },
  88     { 0xa0, 0xa0, 0xa4, 0 },
  89     { 0x80, 0x80, 0x80, 0 },
  90     { 0xff, 0x00, 0x00, 0 },
  91     { 0x00, 0xff, 0x00, 0 },
  92     { 0xff, 0xff, 0x00, 0 },
  93     { 0x00, 0x00, 0xff, 0 },
  94     { 0xff, 0x00, 0xff, 0 },
  95     { 0x00, 0xff, 0xff, 0 },
  96     { 0xff, 0xff, 0xff, 0 }     /* last 10 */
  97 };
  98
  99 /***********************************************************************
 100  *           PALETTE_Init
 101  *
 102  * Create the system palette.
 103  */
 104 HPALETTE PALETTE_Init(void)
 105 {
 106     HPALETTE          hpalette;
 107     LOGPALETTE *        palPtr;
 108     PALETTEOBJ*         palObj;
 109
 110     /* create default palette (20 system colors) */
 111
 112     palPtr = HeapAlloc( GetProcessHeap(), 0,
 113              sizeof(LOGPALETTE) + (NB_RESERVED_COLORS-1)*sizeof(PALETTEENTRY));
 114     if (!palPtr) return FALSE;
 115
 116     palPtr->palVersion = 0x300;
 117     palPtr->palNumEntries = NB_RESERVED_COLORS;
 118     memcpy( palPtr->palPalEntry, sys_pal_template, sizeof(sys_pal_template) );
 119     hpalette = CreatePalette( palPtr );
 120     HeapFree( GetProcessHeap(), 0, palPtr );
 121
 122     palObj = (PALETTEOBJ*) GDI_GetObjPtr( hpalette, PALETTE_MAGIC );
 123     if (palObj)
 124     {
 125         if (!(palObj->mapping = HeapAlloc( GetProcessHeap(), 0, sizeof(int) * NB_RESERVED_COLORS )))
 126             ERR("Can not create palette mapping -- out of memory!\n");
 127         GDI_ReleaseObj( hpalette );
 128     }
 129     return hpalette;
 130 }
 131
 132 /***********************************************************************
 133  *           PALETTE_ValidateFlags
 134  */
 135 static void PALETTE_ValidateFlags(PALETTEENTRY* lpPalE, int size)
 136 {
 137     int i = 0;
 138     for( ; i<size ; i++ )
 139         lpPalE[i].peFlags = PC_SYS_USED | (lpPalE[i].peFlags & 0x07);
 140 }
 141
 142
 143 /***********************************************************************
 144  * CreatePalette [GDI32.@]  Creates a logical color palette
 145  *
 146  * RETURNS
 147  *    Success: Handle to logical palette
 148  *    Failure: NULL
 149  */
 150 HPALETTE WINAPI CreatePalette(
 151     const LOGPALETTE* palette) /* [in] Pointer to logical color palette */
 152 {
 153     PALETTEOBJ * palettePtr;
 154     HPALETTE hpalette;
 155     int size;
 156
 157     if (!palette) return 0;
 158     TRACE("entries=%i\n", palette->palNumEntries);
 159
 160     size = sizeof(LOGPALETTE) + (palette->palNumEntries - 1) * sizeof(PALETTEENTRY);
 161
 162     if (!(palettePtr = GDI_AllocObject( size + sizeof(int*) +sizeof(GDIOBJHDR),
 163                                         PALETTE_MAGIC, (HGDIOBJ *)&hpalette,
 164                                         &palette_funcs ))) return 0;
 165     memcpy( &palettePtr->logpalette, palette, size );
 166     PALETTE_ValidateFlags(palettePtr->logpalette.palPalEntry,
 167                           palettePtr->logpalette.palNumEntries);
 168     palettePtr->mapping = NULL;
 169     GDI_ReleaseObj( hpalette );
 170
 171     TRACE("   returning %p\n", hpalette);
 172     return hpalette;
 173 }
 174
 175
 176 /***********************************************************************
 177  * CreateHalftonePalette [GDI32.@]  Creates a halftone palette
 178  *
 179  * RETURNS
 180  *    Success: Handle to logical halftone palette
 181  *    Failure: 0
 182  *
 183  * FIXME: This simply creates the halftone palette dirived from runing
 184  *        tests on an windows NT machine. this is assuming a color depth
 185  *        of greater that 256 color. On a 256 color device the halftone
 186  *        palette will be differnt and this funtion will be incorrect
 187  */
 188 HPALETTE WINAPI CreateHalftonePalette(
 189     HDC hdc) /* [in] Handle to device context */
 190 {
 191     int i;
 192     struct {
 193         WORD Version;
 194         WORD NumberOfEntries;
 195         PALETTEENTRY aEntries[256];
 196     } Palette;
 197
 198     Palette.Version = 0x300;
 199     Palette.NumberOfEntries = 256;
 200     GetSystemPaletteEntries(hdc, 0, 256, Palette.aEntries);
 201
 202     Palette.NumberOfEntries = 20;
 203
 204     for (i = 0; i < Palette.NumberOfEntries; i++)
 205     {
 206         Palette.aEntries[i].peRed=0xff;
 207         Palette.aEntries[i].peGreen=0xff;
 208         Palette.aEntries[i].peBlue=0xff;
 209         Palette.aEntries[i].peFlags=0x00;
 210     }
 211
 212     Palette.aEntries[0].peRed=0x00;
 213     Palette.aEntries[0].peBlue=0x00;
 214     Palette.aEntries[0].peGreen=0x00;
 215
 216     /* the first 6 */
 217     for (i=1; i <= 6; i++)
 218     {
 219         Palette.aEntries[i].peRed=(i%2)?0x80:0;
 220         Palette.aEntries[i].peGreen=(i==2)?0x80:(i==3)?0x80:(i==6)?0x80:0;
 221         Palette.aEntries[i].peBlue=(i>3)?0x80:0;
 222     }
 223
 224     for (i=7;  i <= 12; i++)
 225     {
 226         switch(i)
 227         {
 228             case 7:
 229                 Palette.aEntries[i].peRed=0xc0;
 230                 Palette.aEntries[i].peBlue=0xc0;
 231                 Palette.aEntries[i].peGreen=0xc0;
 232                 break;
 233             case 8:
 234                 Palette.aEntries[i].peRed=0xc0;
 235                 Palette.aEntries[i].peGreen=0xdc;
 236                 Palette.aEntries[i].peBlue=0xc0;
 237                 break;
 238             case 9:
 239                 Palette.aEntries[i].peRed=0xa6;
 240                 Palette.aEntries[i].peGreen=0xca;
 241                 Palette.aEntries[i].peBlue=0xf0;
 242                 break;
 243             case 10:
 244                 Palette.aEntries[i].peRed=0xff;
 245                 Palette.aEntries[i].peGreen=0xfb;
 246                 Palette.aEntries[i].peBlue=0xf0;
 247                 break;
 248             case 11:
 249                 Palette.aEntries[i].peRed=0xa0;
 250                 Palette.aEntries[i].peGreen=0xa0;
 251                 Palette.aEntries[i].peBlue=0xa4;
 252                 break;
 253             case 12:
 254                 Palette.aEntries[i].peRed=0x80;
 255                 Palette.aEntries[i].peGreen=0x80;
 256                 Palette.aEntries[i].peBlue=0x80;
 257         }
 258     }
 259
 260    for (i=13; i <= 18; i++)
 261     {
 262         Palette.aEntries[i].peRed=(i%2)?0xff:0;
 263         Palette.aEntries[i].peGreen=(i==14)?0xff:(i==15)?0xff:(i==18)?0xff:0;
 264         Palette.aEntries[i].peBlue=(i>15)?0xff:0x00;
 265     }
 266
 267     return CreatePalette((LOGPALETTE *)&Palette);
 268 }
 269
 270
 271 /***********************************************************************
 272  * GetPaletteEntries [GDI32.@]  Retrieves palette entries
 273  *
 274  * RETURNS
 275  *    Success: Number of entries from logical palette
 276  *    Failure: 0
 277  */
 278 UINT WINAPI GetPaletteEntries(
 279     HPALETTE hpalette,    /* [in]  Handle of logical palette */
 280     UINT start,           /* [in]  First entry to receive */
 281     UINT count,           /* [in]  Number of entries to receive */
 282     LPPALETTEENTRY entries) /* [out] Address of array receiving entries */
 283 {
 284     PALETTEOBJ * palPtr;
 285     UINT numEntries;
 286
 287     TRACE("hpal = %p, count=%i\n", hpalette, count );
 288
 289     palPtr = (PALETTEOBJ *) GDI_GetObjPtr( hpalette, PALETTE_MAGIC );
 290     if (!palPtr) return 0;
 291
 292     /* NOTE: not documented but test show this to be the case */
 293     if (count == 0)
 294     {
 295         int rc = palPtr->logpalette.palNumEntries;
 296             GDI_ReleaseObj( hpalette );
 297         return rc;
 298     }
 299
 300     numEntries = palPtr->logpalette.palNumEntries;
 301     if (start+count > numEntries) count = numEntries - start;
 302     if (entries)
 303     {
 304       if (start >= numEntries)
 305       {
 306         GDI_ReleaseObj( hpalette );
 307         return 0;
 308       }
 309       memcpy( entries, &palPtr->logpalette.palPalEntry[start],
 310               count * sizeof(PALETTEENTRY) );
 311       for( numEntries = 0; numEntries < count ; numEntries++ )
 312            if (entries[numEntries].peFlags & 0xF0)
 313                entries[numEntries].peFlags = 0;
 314     }
 315
 316     GDI_ReleaseObj( hpalette );
 317     return count;
 318 }
 319
 320
 321 /***********************************************************************
 322  * SetPaletteEntries [GDI32.@]  Sets color values for range in palette
 323  *
 324  * RETURNS
 325  *    Success: Number of entries that were set
 326  *    Failure: 0
 327  */
 328 UINT WINAPI SetPaletteEntries(
 329     HPALETTE hpalette,    /* [in] Handle of logical palette */
 330     UINT start,           /* [in] Index of first entry to set */
 331     UINT count,           /* [in] Number of entries to set */
 332     const PALETTEENTRY *entries) /* [in] Address of array of structures */
 333 {
 334     PALETTEOBJ * palPtr;
 335     UINT numEntries;
 336
 337     TRACE("hpal=%p,start=%i,count=%i\n",hpalette,start,count );
 338
 339     if (hpalette == GetStockObject(DEFAULT_PALETTE)) return 0;
 340     palPtr = (PALETTEOBJ *) GDI_GetObjPtr( hpalette, PALETTE_MAGIC );
 341     if (!palPtr) return 0;
 342
 343     numEntries = palPtr->logpalette.palNumEntries;
 344     if (start >= numEntries)
 345     {
 346       GDI_ReleaseObj( hpalette );
 347       return 0;
 348     }
 349     if (start+count > numEntries) count = numEntries - start;
 350     memcpy( &palPtr->logpalette.palPalEntry[start], entries,
 351             count * sizeof(PALETTEENTRY) );
 352     PALETTE_ValidateFlags(palPtr->logpalette.palPalEntry,
 353                           palPtr->logpalette.palNumEntries);
 354     UnrealizeObject( hpalette );
 355     GDI_ReleaseObj( hpalette );
 356     return count;
 357 }
 358
 359
 360 /***********************************************************************
 361  * ResizePalette [GDI32.@]  Resizes logical palette
 362  *
 363  * RETURNS
 364  *    Success: TRUE
 365  *    Failure: FALSE
 366  */
 367 BOOL WINAPI ResizePalette(
 368     HPALETTE hPal, /* [in] Handle of logical palette */
 369     UINT cEntries) /* [in] Number of entries in logical palette */
 370 {
 371     PALETTEOBJ * palPtr = (PALETTEOBJ *) GDI_GetObjPtr( hPal, PALETTE_MAGIC );
 372     UINT         cPrevEnt, prevVer;
 373     int          prevsize, size = sizeof(LOGPALETTE) + (cEntries - 1) * sizeof(PALETTEENTRY);
 374     int*         mapping = NULL;
 375
 376     TRACE("hpal = %p, prev = %i, new = %i\n",
 377           hPal, palPtr ? palPtr->logpalette.palNumEntries : -1, cEntries );
 378     if( !palPtr ) return FALSE;
 379     cPrevEnt = palPtr->logpalette.palNumEntries;
 380     prevVer = palPtr->logpalette.palVersion;
 381     prevsize = sizeof(LOGPALETTE) + (cPrevEnt - 1) * sizeof(PALETTEENTRY) +
 382                                         sizeof(int*) + sizeof(GDIOBJHDR);
 383     size += sizeof(int*) + sizeof(GDIOBJHDR);
 384     mapping = palPtr->mapping;
 385
 386     if (!(palPtr = GDI_ReallocObject( size, hPal, palPtr ))) return FALSE;
 387
 388     if( mapping )
 389     {
 390         int *newMap = (int*) HeapReAlloc(GetProcessHeap(), 0,
 391                                     mapping, cEntries * sizeof(int) );
 392         if(newMap == NULL)
 393         {
 394             ERR("Can not resize mapping -- out of memory!\n");
 395             GDI_ReleaseObj( hPal );
 396             return FALSE;
 397         }
 398         palPtr->mapping = newMap;
 399     }
 400
 401     if( cEntries > cPrevEnt )
 402     {
 403         if( mapping )
 404             memset(palPtr->mapping + cPrevEnt, 0, (cEntries - cPrevEnt)*sizeof(int));
 405         memset( (BYTE*)palPtr + prevsize, 0, size - prevsize );
 406         PALETTE_ValidateFlags((PALETTEENTRY*)((BYTE*)palPtr + prevsize),
 407                                                      cEntries - cPrevEnt );
 408     }
 409     palPtr->logpalette.palNumEntries = cEntries;
 410     palPtr->logpalette.palVersion = prevVer;
 411     GDI_ReleaseObj( hPal );
 412     return TRUE;
 413 }
 414
 415
 416 /***********************************************************************
 417  * AnimatePalette [GDI32.@]  Replaces entries in logical palette
 418  *
 419  * RETURNS
 420  *    Success: TRUE
 421  *    Failure: FALSE
 422  *
 423  * FIXME
 424  *    Should use existing mapping when animating a primary palette
 425  */
 426 BOOL WINAPI AnimatePalette(
 427     HPALETTE hPal,              /* [in] Handle to logical palette */
 428     UINT StartIndex,            /* [in] First entry in palette */
 429     UINT NumEntries,            /* [in] Count of entries in palette */
 430     const PALETTEENTRY* PaletteColors) /* [in] Pointer to first replacement */
 431 {
 432     TRACE("%p (%i - %i)\n", hPal, StartIndex,StartIndex+NumEntries);
 433
 434     if( hPal != GetStockObject(DEFAULT_PALETTE) )
 435     {
 436         if (!SetPaletteEntries( hPal, StartIndex, NumEntries, PaletteColors )) return FALSE;
 437
 438         if (pLastRealizedDC && pLastRealizedDC->pRealizePalette)
 439             pLastRealizedDC->pRealizePalette( NULL, hPal, hPal == hPrimaryPalette );
 440     }
 441     return TRUE;
 442 }
 443
 444
 445 /***********************************************************************
 446  * SetSystemPaletteUse [GDI32.@]
 447  *
 448  * RETURNS
 449  *    Success: Previous system palette
 450  *    Failure: SYSPAL_ERROR
 451  */
 452 UINT WINAPI SetSystemPaletteUse(
 453     HDC hdc,  /* [in] Handle of device context */
 454     UINT use) /* [in] Palette-usage flag */
 455 {
 456     UINT old = SystemPaletteUse;
 457     FIXME("(%p,%04x): stub\n", hdc, use );
 458     SystemPaletteUse = use;
 459     return old;
 460 }
 461
 462
 463 /***********************************************************************
 464  * GetSystemPaletteUse [GDI32.@]  Gets state of system palette
 465  *
 466  * RETURNS
 467  *    Current state of system palette
 468  */
 469 UINT WINAPI GetSystemPaletteUse(
 470     HDC hdc) /* [in] Handle of device context */
 471 {
 472     return SystemPaletteUse;
 473 }
 474
 475
 476 /***********************************************************************
 477  * GetSystemPaletteEntries [GDI32.@]  Gets range of palette entries
 478  *
 479  * RETURNS
 480  *    Success: Number of entries retrieved from palette
 481  *    Failure: 0
 482  */
 483 UINT WINAPI GetSystemPaletteEntries(
 484     HDC hdc,              /* [in]  Handle of device context */
 485     UINT start,           /* [in]  Index of first entry to be retrieved */
 486     UINT count,           /* [in]  Number of entries to be retrieved */
 487     LPPALETTEENTRY entries) /* [out] Array receiving system-palette entries */
 488 {
 489     UINT ret = 0;
 490     DC *dc;
 491
 492     TRACE("hdc=%p,start=%i,count=%i\n", hdc,start,count);
 493
 494     if ((dc = DC_GetDCPtr( hdc )))
 495     {
 496         if (dc->funcs->pGetSystemPaletteEntries)
 497             ret = dc->funcs->pGetSystemPaletteEntries( dc->physDev, start, count, entries );
 498         GDI_ReleaseObj( hdc );
 499     }
 500     return ret;
 501 }
 502
 503
 504 /***********************************************************************
 505  * GetNearestPaletteIndex [GDI32.@]  Gets palette index for color
 506  *
 507  * NOTES
 508  *    Should index be initialized to CLR_INVALID instead of 0?
 509  *
 510  * RETURNS
 511  *    Success: Index of entry in logical palette
 512  *    Failure: CLR_INVALID
 513  */
 514 UINT WINAPI GetNearestPaletteIndex(
 515     HPALETTE hpalette, /* [in] Handle of logical color palette */
 516     COLORREF color)      /* [in] Color to be matched */
 517 {
 518     PALETTEOBJ* palObj = (PALETTEOBJ*)GDI_GetObjPtr( hpalette, PALETTE_MAGIC );
 519     UINT index  = 0;
 520
 521     if( palObj )
 522     {
 523         int i, diff = 0x7fffffff;
 524         int r,g,b;
 525         PALETTEENTRY* entry = palObj->logpalette.palPalEntry;
 526
 527         for( i = 0; i < palObj->logpalette.palNumEntries && diff ; i++, entry++)
 528         {
 529             if (!(entry->peFlags & PC_SYS_USED)) continue;
 530
 531             r = entry->peRed - GetRValue(color);
 532             g = entry->peGreen - GetGValue(color);
 533             b = entry->peBlue - GetBValue(color);
 534
 535             r = r*r + g*g + b*b;
 536
 537             if( r < diff ) { index = i; diff = r; }
 538         }
 539         GDI_ReleaseObj( hpalette );
 540     }
 541     TRACE("(%p,%06lx): returning %d\n", hpalette, color, index );
 542     return index;
 543 }
 544
 545
 546 /***********************************************************************
 547  * GetNearestColor [GDI32.@]  Gets a system color to match
 548  *
 549  * RETURNS
 550  *    Success: Color from system palette that corresponds to given color
 551  *    Failure: CLR_INVALID
 552  */
 553 COLORREF WINAPI GetNearestColor(
 554     HDC hdc,      /* [in] Handle of device context */
 555     COLORREF color) /* [in] Color to be matched */
 556 {
 557     unsigned char spec_type;
 558     COLORREF nearest;
 559     DC          *dc;
 560
 561     if (!(dc = DC_GetDCPtr( hdc ))) return CLR_INVALID;
 562
 563     if (dc->funcs->pGetNearestColor)
 564     {
 565         nearest = dc->funcs->pGetNearestColor( dc->physDev, color );
 566         GDI_ReleaseObj( hdc );
 567         return nearest;
 568     }
 569
 570     if (!(GetDeviceCaps(hdc, RASTERCAPS) & RC_PALETTE))
 571     {
 572         GDI_ReleaseObj( hdc );
 573         return color;
 574     }
 575
 576     spec_type = color >> 24;
 577     if (spec_type == 1 || spec_type == 2)
 578     {
 579         /* we need logical palette for PALETTERGB and PALETTEINDEX colorrefs */
 580
 581         UINT index;
 582         PALETTEENTRY entry;
 583         HPALETTE hpal = dc->hPalette ? dc->hPalette : GetStockObject( DEFAULT_PALETTE );
 584
 585         if (spec_type == 2) /* PALETTERGB */
 586             index = GetNearestPaletteIndex( hpal, color );
 587         else  /* PALETTEINDEX */
 588             index = LOWORD(color);
 589
 590         if (!GetPaletteEntries( hpal, index, 1, &entry ))
 591         {
 592             WARN("RGB(%lx) : idx %d is out of bounds, assuming NULL\n", color, index );
 593             if (!GetPaletteEntries( hpal, 0, 1, &entry ))
 594             {
 595                 GDI_ReleaseObj( hdc );
 596                 return CLR_INVALID;
 597             }
 598         }
 599         color = RGB( entry.peRed, entry.peGreen, entry.peBlue );
 600     }
 601     nearest = color & 0x00ffffff;
 602     GDI_ReleaseObj( hdc );
 603
 604     TRACE("(%06lx): returning %06lx\n", color, nearest );
 605     return nearest;
 606 }
 607
 608
 609 /***********************************************************************
 610  *           PALETTE_GetObject
 611  */
 612 static INT PALETTE_GetObject( HGDIOBJ handle, void *obj, INT count, LPVOID buffer )
 613 {
 614     PALETTEOBJ *palette = obj;
 615
 616     if (count > sizeof(WORD)) count = sizeof(WORD);
 617     memcpy( buffer, &palette->logpalette.palNumEntries, count );
 618     return count;
 619 }
 620
 621
 622 /***********************************************************************
 623  *           PALETTE_UnrealizeObject
 624  */
 625 static BOOL PALETTE_UnrealizeObject( HGDIOBJ handle, void *obj )
 626 {
 627     PALETTEOBJ *palette = obj;
 628
 629     if (palette->mapping)
 630     {
 631         HeapFree( GetProcessHeap(), 0, palette->mapping );
 632         palette->mapping = NULL;
 633     }
 634     if (hLastRealizedPalette == handle)
 635     {
 636         hLastRealizedPalette = 0;
 637         pLastRealizedDC = NULL;
 638     }
 639     return TRUE;
 640 }
 641
 642
 643 /***********************************************************************
 644  *           PALETTE_DeleteObject
 645  */
 646 static BOOL PALETTE_DeleteObject( HGDIOBJ handle, void *obj )
 647 {
 648     PALETTEOBJ *palette = obj;
 649
 650     HeapFree( GetProcessHeap(), 0, palette->mapping );
 651     if (hLastRealizedPalette == handle)
 652     {
 653         hLastRealizedPalette = 0;
 654         pLastRealizedDC = NULL;
 655     }
 656     return GDI_FreeObject( handle, obj );
 657 }
 658
 659
 660 /***********************************************************************
 661  *           GDISelectPalette    (Not a Windows API)
 662  */
 663 HPALETTE WINAPI GDISelectPalette( HDC hdc, HPALETTE hpal, WORD wBkg)
 664 {
 665     HPALETTE prev;
 666     DC *dc;
 667
 668     TRACE("%p %p\n", hdc, hpal );
 669
 670     if (GetObjectType(hpal) != OBJ_PAL)
 671     {
 672       WARN("invalid selected palette %p\n",hpal);
 673       return 0;
 674     }
 675     if (!(dc = DC_GetDCPtr( hdc ))) return 0;
 676     prev = dc->hPalette;
 677     dc->hPalette = hpal;
 678     GDI_ReleaseObj( hdc );
 679     if (!wBkg) hPrimaryPalette = hpal;
 680     return prev;
 681 }
 682
 683
 684 /***********************************************************************
 685  *           GDIRealizePalette    (Not a Windows API)
 686  */
 687 UINT WINAPI GDIRealizePalette( HDC hdc )
 688 {
 689     UINT realized = 0;
 690     DC* dc = DC_GetDCPtr( hdc );
 691
 692     if (!dc) return 0;
 693
 694     TRACE("%p...\n", hdc );
 695
 696     if( dc->hPalette == GetStockObject( DEFAULT_PALETTE ))
 697     {
 698         if (dc->funcs->pRealizeDefaultPalette)
 699             realized = dc->funcs->pRealizeDefaultPalette( dc->physDev );
 700     }
 701     else if(dc->hPalette != hLastRealizedPalette )
 702     {
 703         if (dc->funcs->pRealizePalette)
 704             realized = dc->funcs->pRealizePalette( dc->physDev, dc->hPalette,
 705                                                    (dc->hPalette == hPrimaryPalette) );
 706         hLastRealizedPalette = dc->hPalette;
 707         pLastRealizedDC = dc->funcs;
 708     }
 709     else TRACE("  skipping (hLastRealizedPalette = %p)\n", hLastRealizedPalette);
 710
 711     GDI_ReleaseObj( hdc );
 712     TRACE("   realized %i colors.\n", realized );
 713     return realized;
 714 }
 715
 716
 717 /***********************************************************************
 718  *           RealizeDefaultPalette    (GDI.365)
 719  */
 720 UINT16 WINAPI RealizeDefaultPalette16( HDC16 hdc )
 721 {
 722     UINT16 ret = 0;
 723     DC          *dc;
 724
 725     TRACE("%04x\n", hdc );
 726
 727     if (!(dc = DC_GetDCPtr( HDC_32(hdc) ))) return 0;
 728
 729     if (dc->funcs->pRealizeDefaultPalette) ret = dc->funcs->pRealizeDefaultPalette( dc->physDev );
 730     GDI_ReleaseObj( HDC_32(hdc) );
 731     return ret;
 732 }
 733
 734 /***********************************************************************
 735  *           IsDCCurrentPalette   (GDI.412)
 736  */
 737 BOOL16 WINAPI IsDCCurrentPalette16(HDC16 hDC)
 738 {
 739     DC *dc = DC_GetDCPtr( HDC_32(hDC) );
 740     if (dc)
 741     {
 742       BOOL bRet = dc->hPalette == hPrimaryPalette;
 743       GDI_ReleaseObj( HDC_32(hDC) );
 744       return bRet;
 745     }
 746     return FALSE;
 747 }
 748
 749
 750 /***********************************************************************
 751  * SelectPalette [GDI32.@]  Selects logical palette into DC
 752  *
 753  * RETURNS
 754  *    Success: Previous logical palette
 755  *    Failure: NULL
 756  */
 757 HPALETTE WINAPI SelectPalette(
 758     HDC hDC,               /* [in] Handle of device context */
 759     HPALETTE hPal,         /* [in] Handle of logical color palette */
 760     BOOL bForceBackground) /* [in] Foreground/background mode */
 761 {
 762     return pfnSelectPalette( hDC, hPal, bForceBackground );
 763 }
 764
 765
 766 /***********************************************************************
 767  * RealizePalette [GDI32.@]  Maps palette entries to system palette
 768  *
 769  * RETURNS
 770  *    Success: Number of entries in logical palette
 771  *    Failure: GDI_ERROR
 772  */
 773 UINT WINAPI RealizePalette(
 774     HDC hDC) /* [in] Handle of device context */
 775 {
 776     return pfnRealizePalette( hDC );
 777 }
 778
 779
 780 typedef HWND (WINAPI *WindowFromDC_funcptr)( HDC );
 781 typedef BOOL (WINAPI *RedrawWindow_funcptr)( HWND, const RECT *, HRGN, UINT );
 782
 783 /**********************************************************************
 784  * UpdateColors [GDI32.@]  Remaps current colors to logical palette
 785  *
 786  * RETURNS
 787  *    Success: TRUE
 788  *    Failure: FALSE
 789  */
 790 BOOL WINAPI UpdateColors(
 791     HDC hDC) /* [in] Handle of device context */
 792 {
 793     HMODULE mod;
 794     int size = GetDeviceCaps( hDC, SIZEPALETTE );
 795
 796     if (!size) return 0;
 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  *           SetMagicColors   (GDI.606)
 822  */
 823 VOID WINAPI SetMagicColors16(HDC16 hDC, COLORREF color, UINT16 index)
 824 {
 825     FIXME("(hDC %04x, color %04x, index %04x): stub\n", hDC, (int)color, index);
 826
 827 }
 828
 829 /**********************************************************************
 830  * GetICMProfileA [GDI32.@]
 831  *
 832  * Returns the filename of the specified device context's color
 833  * management profile, even if color management is not enabled
 834  * for that DC.
 835  *
 836  * RETURNS
 837  *    TRUE if name copied succesfully OR lpszFilename is NULL
 838  *    FALSE if the buffer length pointed to by lpcbName is too small
 839  *
 840  * NOTE
 841  *    The buffer length pointed to by lpcbName is ALWAYS updated to
 842  *    the length required regardless of other actions this function
 843  *    may take.
 844  *
 845  * FIXME
 846  *    How does Windows assign these?  Some registry key?
 847  */
 848
 849 #define WINEICM "winefake.icm"  /* easy-to-identify fake filename */
 850
 851 /*********************************************************************/
 852
 853 BOOL WINAPI GetICMProfileA(HDC hDC, LPDWORD lpcbName, LPSTR lpszFilename)
 854 {
 855     DWORD callerLen;
 856
 857     FIXME("(%p, %p, %p): partial stub\n", hDC, lpcbName, lpszFilename);
 858
 859     callerLen = *lpcbName;
 860
 861     /* all 3 behaviors require the required buffer size to be set */
 862     *lpcbName = strlen(WINEICM);
 863
 864     /* behavior 1: if lpszFilename is NULL, return size of string and no error */
 865     if ((DWORD)lpszFilename == (DWORD)0x00000000)
 866         return TRUE;
 867
 868     /* behavior 2: if buffer size too small, return size of string and error */
 869     if (callerLen < strlen(WINEICM))
 870     {
 871         SetLastError(ERROR_INSUFFICIENT_BUFFER);
 872         return FALSE;
 873     }
 874
 875     /* behavior 3: if buffer size OK and pointer not NULL, copy and return size */
 876     strcpy(lpszFilename, WINEICM);
 877     return TRUE;
 878 }