dlls/gdi/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 <stdarg.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29
  30 #include "windef.h"
  31 #include "winbase.h"
  32 #include "wingdi.h"
  33 #include "wownt32.h"
  34 #include "wine/winuser16.h"
  35 #include "gdi.h"
  36 #include "gdi_private.h"
  37 #include "wine/debug.h"
  38 #include "winerror.h"
  39
  40 WINE_DEFAULT_DEBUG_CHANNEL(palette);
  41
  42 static INT PALETTE_GetObject( HGDIOBJ handle, void *obj, INT count, LPVOID buffer );
  43 static BOOL PALETTE_UnrealizeObject( HGDIOBJ handle, void *obj );
  44 static BOOL PALETTE_DeleteObject( HGDIOBJ handle, void *obj );
  45
  46 static const struct gdi_obj_funcs palette_funcs =
  47 {
  48     NULL,                     /* pSelectObject */
  49     PALETTE_GetObject,        /* pGetObject16 */
  50     PALETTE_GetObject,        /* pGetObjectA */
  51     PALETTE_GetObject,        /* pGetObjectW */
  52     PALETTE_UnrealizeObject,  /* pUnrealizeObject */
  53     PALETTE_DeleteObject      /* pDeleteObject */
  54 };
  55
  56 /* Pointers to USER implementation of SelectPalette/RealizePalette */
  57 /* they will be patched by USER on startup */
  58 HPALETTE (WINAPI *pfnSelectPalette)(HDC hdc, HPALETTE hpal, WORD bkgnd ) = GDISelectPalette;
  59 UINT (WINAPI *pfnRealizePalette)(HDC hdc) = GDIRealizePalette;
  60
  61 static UINT SystemPaletteUse = SYSPAL_STATIC;  /* currently not considered */
  62
  63 static HPALETTE hPrimaryPalette = 0; /* used for WM_PALETTECHANGED */
  64 static HPALETTE hLastRealizedPalette = 0; /* UnrealizeObject() needs it */
  65 static const DC_FUNCTIONS *pLastRealizedDC;
  66
  67 static const PALETTEENTRY sys_pal_template[NB_RESERVED_COLORS] =
  68 {
  69     /* first 10 entries in the system palette */
  70     /* red  green blue  flags */
  71     { 0x00, 0x00, 0x00, 0 },
  72     { 0x80, 0x00, 0x00, 0 },
  73     { 0x00, 0x80, 0x00, 0 },
  74     { 0x80, 0x80, 0x00, 0 },
  75     { 0x00, 0x00, 0x80, 0 },
  76     { 0x80, 0x00, 0x80, 0 },
  77     { 0x00, 0x80, 0x80, 0 },
  78     { 0xc0, 0xc0, 0xc0, 0 },
  79     { 0xc0, 0xdc, 0xc0, 0 },
  80     { 0xa6, 0xca, 0xf0, 0 },
  81
  82     /* ... c_min/2 dynamic colorcells */
  83
  84     /* ... gap (for sparse palettes) */
  85
  86     /* ... c_min/2 dynamic colorcells */
  87
  88     { 0xff, 0xfb, 0xf0, 0 },
  89     { 0xa0, 0xa0, 0xa4, 0 },
  90     { 0x80, 0x80, 0x80, 0 },
  91     { 0xff, 0x00, 0x00, 0 },
  92     { 0x00, 0xff, 0x00, 0 },
  93     { 0xff, 0xff, 0x00, 0 },
  94     { 0x00, 0x00, 0xff, 0 },
  95     { 0xff, 0x00, 0xff, 0 },
  96     { 0x00, 0xff, 0xff, 0 },
  97     { 0xff, 0xff, 0xff, 0 }     /* last 10 */
  98 };
  99
 100 /***********************************************************************
 101  *           PALETTE_Init
 102  *
 103  * Create the system palette.
 104  */
 105 HPALETTE PALETTE_Init(void)
 106 {
 107     HPALETTE          hpalette;
 108     LOGPALETTE *        palPtr;
 109     PALETTEOBJ*         palObj;
 110
 111     /* create default palette (20 system colors) */
 112
 113     palPtr = HeapAlloc( GetProcessHeap(), 0,
 114              sizeof(LOGPALETTE) + (NB_RESERVED_COLORS-1)*sizeof(PALETTEENTRY));
 115     if (!palPtr) return FALSE;
 116
 117     palPtr->palVersion = 0x300;
 118     palPtr->palNumEntries = NB_RESERVED_COLORS;
 119     memcpy( palPtr->palPalEntry, sys_pal_template, sizeof(sys_pal_template) );
 120     hpalette = CreatePalette( palPtr );
 121     HeapFree( GetProcessHeap(), 0, palPtr );
 122
 123     palObj = (PALETTEOBJ*) GDI_GetObjPtr( hpalette, PALETTE_MAGIC );
 124     if (palObj)
 125     {
 126         if (!(palObj->mapping = HeapAlloc( GetProcessHeap(), 0, sizeof(int) * NB_RESERVED_COLORS )))
 127             ERR("Can not create palette mapping -- out of memory!\n");
 128         GDI_ReleaseObj( hpalette );
 129     }
 130     return hpalette;
 131 }
 132
 133 /***********************************************************************
 134  *           PALETTE_ValidateFlags
 135  */
 136 static void PALETTE_ValidateFlags(PALETTEENTRY* lpPalE, int size)
 137 {
 138     int i = 0;
 139     for( ; i<size ; i++ )
 140         lpPalE[i].peFlags = PC_SYS_USED | (lpPalE[i].peFlags & 0x07);
 141 }
 142
 143
 144 /***********************************************************************
 145  * CreatePalette [GDI32.@]
 146  *
 147  * Creates a logical color palette.
 148  *
 149  * RETURNS
 150  *    Success: Handle to logical palette
 151  *    Failure: NULL
 152  */
 153 HPALETTE WINAPI CreatePalette(
 154     const LOGPALETTE* palette) /* [in] Pointer to logical color palette */
 155 {
 156     PALETTEOBJ * palettePtr;
 157     HPALETTE hpalette;
 158     int size;
 159
 160     if (!palette) return 0;
 161     TRACE("entries=%i\n", palette->palNumEntries);
 162
 163     size = sizeof(LOGPALETTE) + (palette->palNumEntries - 1) * sizeof(PALETTEENTRY);
 164
 165     if (!(palettePtr = GDI_AllocObject( size + sizeof(int*) +sizeof(GDIOBJHDR),
 166                                         PALETTE_MAGIC, (HGDIOBJ *)&hpalette,
 167                                         &palette_funcs ))) return 0;
 168     memcpy( &palettePtr->logpalette, palette, size );
 169     PALETTE_ValidateFlags(palettePtr->logpalette.palPalEntry,
 170                           palettePtr->logpalette.palNumEntries);
 171     palettePtr->mapping = NULL;
 172     GDI_ReleaseObj( hpalette );
 173
 174     TRACE("   returning %p\n", hpalette);
 175     return hpalette;
 176 }
 177
 178
 179 /***********************************************************************
 180  * CreateHalftonePalette [GDI32.@]
 181  *
 182  * Creates a halftone palette.
 183  *
 184  * RETURNS
 185  *    Success: Handle to logical halftone palette
 186  *    Failure: 0
 187  *
 188  * FIXME: This simply creates the halftone palette derived from running
 189  *        tests on an windows NT machine. this is assuming a color depth
 190  *        of greater that 256 color. On a 256 color device the halftone
 191  *        palette will be different and this function will be incorrect
 192  */
 193 HPALETTE WINAPI CreateHalftonePalette(
 194     HDC hdc) /* [in] Handle to device context */
 195 {
 196     int i;
 197     struct {
 198         WORD Version;
 199         WORD NumberOfEntries;
 200         PALETTEENTRY aEntries[256];
 201     } Palette;
 202
 203     Palette.Version = 0x300;
 204     Palette.NumberOfEntries = 256;
 205     GetSystemPaletteEntries(hdc, 0, 256, Palette.aEntries);
 206
 207     Palette.NumberOfEntries = 20;
 208
 209     for (i = 0; i < Palette.NumberOfEntries; i++)
 210     {
 211         Palette.aEntries[i].peRed=0xff;
 212         Palette.aEntries[i].peGreen=0xff;
 213         Palette.aEntries[i].peBlue=0xff;
 214         Palette.aEntries[i].peFlags=0x00;
 215     }
 216
 217     Palette.aEntries[0].peRed=0x00;
 218     Palette.aEntries[0].peBlue=0x00;
 219     Palette.aEntries[0].peGreen=0x00;
 220
 221     /* the first 6 */
 222     for (i=1; i <= 6; i++)
 223     {
 224         Palette.aEntries[i].peRed=(i%2)?0x80:0;
 225         Palette.aEntries[i].peGreen=(i==2)?0x80:(i==3)?0x80:(i==6)?0x80:0;
 226         Palette.aEntries[i].peBlue=(i>3)?0x80:0;
 227     }
 228
 229     for (i=7;  i <= 12; i++)
 230     {
 231         switch(i)
 232         {
 233             case 7:
 234                 Palette.aEntries[i].peRed=0xc0;
 235                 Palette.aEntries[i].peBlue=0xc0;
 236                 Palette.aEntries[i].peGreen=0xc0;
 237                 break;
 238             case 8:
 239                 Palette.aEntries[i].peRed=0xc0;
 240                 Palette.aEntries[i].peGreen=0xdc;
 241                 Palette.aEntries[i].peBlue=0xc0;
 242                 break;
 243             case 9:
 244                 Palette.aEntries[i].peRed=0xa6;
 245                 Palette.aEntries[i].peGreen=0xca;
 246                 Palette.aEntries[i].peBlue=0xf0;
 247                 break;
 248             case 10:
 249                 Palette.aEntries[i].peRed=0xff;
 250                 Palette.aEntries[i].peGreen=0xfb;
 251                 Palette.aEntries[i].peBlue=0xf0;
 252                 break;
 253             case 11:
 254                 Palette.aEntries[i].peRed=0xa0;
 255                 Palette.aEntries[i].peGreen=0xa0;
 256                 Palette.aEntries[i].peBlue=0xa4;
 257                 break;
 258             case 12:
 259                 Palette.aEntries[i].peRed=0x80;
 260                 Palette.aEntries[i].peGreen=0x80;
 261                 Palette.aEntries[i].peBlue=0x80;
 262         }
 263     }
 264
 265    for (i=13; i <= 18; i++)
 266     {
 267         Palette.aEntries[i].peRed=(i%2)?0xff:0;
 268         Palette.aEntries[i].peGreen=(i==14)?0xff:(i==15)?0xff:(i==18)?0xff:0;
 269         Palette.aEntries[i].peBlue=(i>15)?0xff:0x00;
 270     }
 271
 272     return CreatePalette((LOGPALETTE *)&Palette);
 273 }
 274
 275
 276 /***********************************************************************
 277  * GetPaletteEntries [GDI32.@]
 278  *
 279  * Retrieves palette entries.
 280  *
 281  * RETURNS
 282  *    Success: Number of entries from logical palette
 283  *    Failure: 0
 284  */
 285 UINT WINAPI GetPaletteEntries(
 286     HPALETTE hpalette,    /* [in]  Handle of logical palette */
 287     UINT start,           /* [in]  First entry to receive */
 288     UINT count,           /* [in]  Number of entries to receive */
 289     LPPALETTEENTRY entries) /* [out] Address of array receiving entries */
 290 {
 291     PALETTEOBJ * palPtr;
 292     UINT numEntries;
 293
 294     TRACE("hpal = %p, count=%i\n", hpalette, count );
 295
 296     palPtr = (PALETTEOBJ *) GDI_GetObjPtr( hpalette, PALETTE_MAGIC );
 297     if (!palPtr) return 0;
 298
 299     /* NOTE: not documented but test show this to be the case */
 300     if (count == 0)
 301     {
 302         int rc = palPtr->logpalette.palNumEntries;
 303             GDI_ReleaseObj( hpalette );
 304         return rc;
 305     }
 306
 307     numEntries = palPtr->logpalette.palNumEntries;
 308     if (start+count > numEntries) count = numEntries - start;
 309     if (entries)
 310     {
 311       if (start >= numEntries)
 312       {
 313         GDI_ReleaseObj( hpalette );
 314         return 0;
 315       }
 316       memcpy( entries, &palPtr->logpalette.palPalEntry[start],
 317               count * sizeof(PALETTEENTRY) );
 318       for( numEntries = 0; numEntries < count ; numEntries++ )
 319            if (entries[numEntries].peFlags & 0xF0)
 320                entries[numEntries].peFlags = 0;
 321     }
 322
 323     GDI_ReleaseObj( hpalette );
 324     return count;
 325 }
 326
 327
 328 /***********************************************************************
 329  * SetPaletteEntries [GDI32.@]
 330  *
 331  * Sets color values for range in palette.
 332  *
 333  * RETURNS
 334  *    Success: Number of entries that were set
 335  *    Failure: 0
 336  */
 337 UINT WINAPI SetPaletteEntries(
 338     HPALETTE hpalette,    /* [in] Handle of logical palette */
 339     UINT start,           /* [in] Index of first entry to set */
 340     UINT count,           /* [in] Number of entries to set */
 341     const PALETTEENTRY *entries) /* [in] Address of array of structures */
 342 {
 343     PALETTEOBJ * palPtr;
 344     UINT numEntries;
 345
 346     TRACE("hpal=%p,start=%i,count=%i\n",hpalette,start,count );
 347
 348     if (hpalette == GetStockObject(DEFAULT_PALETTE)) return 0;
 349     palPtr = (PALETTEOBJ *) GDI_GetObjPtr( hpalette, PALETTE_MAGIC );
 350     if (!palPtr) return 0;
 351
 352     numEntries = palPtr->logpalette.palNumEntries;
 353     if (start >= numEntries)
 354     {
 355       GDI_ReleaseObj( hpalette );
 356       return 0;
 357     }
 358     if (start+count > numEntries) count = numEntries - start;
 359     memcpy( &palPtr->logpalette.palPalEntry[start], entries,
 360             count * sizeof(PALETTEENTRY) );
 361     PALETTE_ValidateFlags(palPtr->logpalette.palPalEntry,
 362                           palPtr->logpalette.palNumEntries);
 363     UnrealizeObject( hpalette );
 364     GDI_ReleaseObj( hpalette );
 365     return count;
 366 }
 367
 368
 369 /***********************************************************************
 370  * ResizePalette [GDI32.@]
 371  *
 372  * Resizes logical palette.
 373  *
 374  * RETURNS
 375  *    Success: TRUE
 376  *    Failure: FALSE
 377  */
 378 BOOL WINAPI ResizePalette(
 379     HPALETTE hPal, /* [in] Handle of logical palette */
 380     UINT cEntries) /* [in] Number of entries in logical palette */
 381 {
 382     PALETTEOBJ * palPtr = (PALETTEOBJ *) GDI_GetObjPtr( hPal, PALETTE_MAGIC );
 383     UINT         cPrevEnt, prevVer;
 384     int          prevsize, size = sizeof(LOGPALETTE) + (cEntries - 1) * sizeof(PALETTEENTRY);
 385     int*         mapping = NULL;
 386
 387     TRACE("hpal = %p, prev = %i, new = %i\n",
 388           hPal, palPtr ? palPtr->logpalette.palNumEntries : -1, cEntries );
 389     if( !palPtr ) return FALSE;
 390     cPrevEnt = palPtr->logpalette.palNumEntries;
 391     prevVer = palPtr->logpalette.palVersion;
 392     prevsize = sizeof(LOGPALETTE) + (cPrevEnt - 1) * sizeof(PALETTEENTRY) +
 393                                         sizeof(int*) + sizeof(GDIOBJHDR);
 394     size += sizeof(int*) + sizeof(GDIOBJHDR);
 395     mapping = palPtr->mapping;
 396
 397     if (!(palPtr = GDI_ReallocObject( size, hPal, palPtr ))) return FALSE;
 398
 399     if( mapping )
 400     {
 401         int *newMap = (int*) HeapReAlloc(GetProcessHeap(), 0,
 402                                     mapping, cEntries * sizeof(int) );
 403         if(newMap == NULL)
 404         {
 405             ERR("Can not resize mapping -- out of memory!\n");
 406             GDI_ReleaseObj( hPal );
 407             return FALSE;
 408         }
 409         palPtr->mapping = newMap;
 410     }
 411
 412     if( cEntries > cPrevEnt )
 413     {
 414         if( mapping )
 415             memset(palPtr->mapping + cPrevEnt, 0, (cEntries - cPrevEnt)*sizeof(int));
 416         memset( (BYTE*)palPtr + prevsize, 0, size - prevsize );
 417         PALETTE_ValidateFlags((PALETTEENTRY*)((BYTE*)palPtr + prevsize),
 418                                                      cEntries - cPrevEnt );
 419     }
 420     palPtr->logpalette.palNumEntries = cEntries;
 421     palPtr->logpalette.palVersion = prevVer;
 422     GDI_ReleaseObj( hPal );
 423     return TRUE;
 424 }
 425
 426
 427 /***********************************************************************
 428  * AnimatePalette [GDI32.@]
 429  *
 430  * Replaces entries in logical palette.
 431  *
 432  * RETURNS
 433  *    Success: TRUE
 434  *    Failure: FALSE
 435  *
 436  * FIXME
 437  *    Should use existing mapping when animating a primary palette
 438  */
 439 BOOL WINAPI AnimatePalette(
 440     HPALETTE hPal,              /* [in] Handle to logical palette */
 441     UINT StartIndex,            /* [in] First entry in palette */
 442     UINT NumEntries,            /* [in] Count of entries in palette */
 443     const PALETTEENTRY* PaletteColors) /* [in] Pointer to first replacement */
 444 {
 445     TRACE("%p (%i - %i)\n", hPal, StartIndex,StartIndex+NumEntries);
 446
 447     if( hPal != GetStockObject(DEFAULT_PALETTE) )
 448     {
 449         PALETTEOBJ * palPtr;
 450         UINT pal_entries;
 451         const PALETTEENTRY *pptr = PaletteColors;
 452
 453         palPtr = (PALETTEOBJ *) GDI_GetObjPtr( hPal, PALETTE_MAGIC );
 454         if (!palPtr) return 0;
 455
 456         pal_entries = palPtr->logpalette.palNumEntries;
 457         if (StartIndex >= pal_entries)
 458         {
 459           GDI_ReleaseObj( hPal );
 460           return 0;
 461         }
 462         if (StartIndex+NumEntries > pal_entries) NumEntries = pal_entries - StartIndex;
 463
 464         for (NumEntries += StartIndex; StartIndex < NumEntries; StartIndex++, pptr++) {
 465           /* According to MSDN, only animate PC_RESERVED colours */
 466           if (palPtr->logpalette.palPalEntry[StartIndex].peFlags & PC_RESERVED) {
 467             TRACE("Animating colour (%d,%d,%d) to (%d,%d,%d)\n",
 468               palPtr->logpalette.palPalEntry[StartIndex].peRed,
 469               palPtr->logpalette.palPalEntry[StartIndex].peGreen,
 470               palPtr->logpalette.palPalEntry[StartIndex].peBlue,
 471               pptr->peRed, pptr->peGreen, pptr->peBlue);
 472             memcpy( &palPtr->logpalette.palPalEntry[StartIndex], pptr,
 473                     sizeof(PALETTEENTRY) );
 474             PALETTE_ValidateFlags(&palPtr->logpalette.palPalEntry[StartIndex], 1);
 475           } else {
 476             TRACE("Not animating entry %d -- not PC_RESERVED\n", StartIndex);
 477           }
 478         }
 479
 480         GDI_ReleaseObj( hPal );
 481
 482         TRACE("pLastRealizedDC %p -- pLastRealizedDC->pRealizePalette %p\n",
 483           pLastRealizedDC, pLastRealizedDC ? pLastRealizedDC->pRealizePalette : 0);
 484
 485         if (pLastRealizedDC && pLastRealizedDC->pRealizePalette)
 486             pLastRealizedDC->pRealizePalette( NULL, hPal, hPal == hPrimaryPalette );
 487     }
 488     return TRUE;
 489 }
 490
 491
 492 /***********************************************************************
 493  * SetSystemPaletteUse [GDI32.@]
 494  *
 495  * RETURNS
 496  *    Success: Previous system palette
 497  *    Failure: SYSPAL_ERROR
 498  */
 499 UINT WINAPI SetSystemPaletteUse(
 500     HDC hdc,  /* [in] Handle of device context */
 501     UINT use) /* [in] Palette-usage flag */
 502 {
 503     UINT old = SystemPaletteUse;
 504
 505     /* Device doesn't support colour palettes */
 506     if (!(GetDeviceCaps(hdc, RASTERCAPS) & RC_PALETTE)) {
 507         return SYSPAL_ERROR;
 508     }
 509
 510     switch (use) {
 511         case SYSPAL_NOSTATIC:
 512         case SYSPAL_NOSTATIC256:        /* WINVER >= 0x0500 */
 513         case SYSPAL_STATIC:
 514             SystemPaletteUse = use;
 515             return old;
 516         default:
 517             return SYSPAL_ERROR;
 518     }
 519 }
 520
 521
 522 /***********************************************************************
 523  * GetSystemPaletteUse [GDI32.@]
 524  *
 525  * Gets state of system palette.
 526  *
 527  * RETURNS
 528  *    Current state of system palette
 529  */
 530 UINT WINAPI GetSystemPaletteUse(
 531     HDC hdc) /* [in] Handle of device context */
 532 {
 533     return SystemPaletteUse;
 534 }
 535
 536
 537 /***********************************************************************
 538  * GetSystemPaletteEntries [GDI32.@]
 539  *
 540  * Gets range of palette entries.
 541  *
 542  * RETURNS
 543  *    Success: Number of entries retrieved from palette
 544  *    Failure: 0
 545  */
 546 UINT WINAPI GetSystemPaletteEntries(
 547     HDC hdc,              /* [in]  Handle of device context */
 548     UINT start,           /* [in]  Index of first entry to be retrieved */
 549     UINT count,           /* [in]  Number of entries to be retrieved */
 550     LPPALETTEENTRY entries) /* [out] Array receiving system-palette entries */
 551 {
 552     UINT ret = 0;
 553     DC *dc;
 554
 555     TRACE("hdc=%p,start=%i,count=%i\n", hdc,start,count);
 556
 557     if ((dc = DC_GetDCPtr( hdc )))
 558     {
 559         if (dc->funcs->pGetSystemPaletteEntries)
 560             ret = dc->funcs->pGetSystemPaletteEntries( dc->physDev, start, count, entries );
 561         GDI_ReleaseObj( hdc );
 562     }
 563     return ret;
 564 }
 565
 566
 567 /***********************************************************************
 568  * GetNearestPaletteIndex [GDI32.@]
 569  *
 570  * Gets palette index for color.
 571  *
 572  * NOTES
 573  *    Should index be initialized to CLR_INVALID instead of 0?
 574  *
 575  * RETURNS
 576  *    Success: Index of entry in logical palette
 577  *    Failure: CLR_INVALID
 578  */
 579 UINT WINAPI GetNearestPaletteIndex(
 580     HPALETTE hpalette, /* [in] Handle of logical color palette */
 581     COLORREF color)      /* [in] Color to be matched */
 582 {
 583     PALETTEOBJ* palObj = (PALETTEOBJ*)GDI_GetObjPtr( hpalette, PALETTE_MAGIC );
 584     UINT index  = 0;
 585
 586     if( palObj )
 587     {
 588         int i, diff = 0x7fffffff;
 589         int r,g,b;
 590         PALETTEENTRY* entry = palObj->logpalette.palPalEntry;
 591
 592         for( i = 0; i < palObj->logpalette.palNumEntries && diff ; i++, entry++)
 593         {
 594             if (!(entry->peFlags & PC_SYS_USED)) continue;
 595
 596             r = entry->peRed - GetRValue(color);
 597             g = entry->peGreen - GetGValue(color);
 598             b = entry->peBlue - GetBValue(color);
 599
 600             r = r*r + g*g + b*b;
 601
 602             if( r < diff ) { index = i; diff = r; }
 603         }
 604         GDI_ReleaseObj( hpalette );
 605     }
 606     TRACE("(%p,%06lx): returning %d\n", hpalette, color, index );
 607     return index;
 608 }
 609
 610
 611 /***********************************************************************
 612  * GetNearestColor [GDI32.@]
 613  *
 614  * Gets a system color to match.
 615  *
 616  * RETURNS
 617  *    Success: Color from system palette that corresponds to given color
 618  *    Failure: CLR_INVALID
 619  */
 620 COLORREF WINAPI GetNearestColor(
 621     HDC hdc,      /* [in] Handle of device context */
 622     COLORREF color) /* [in] Color to be matched */
 623 {
 624     unsigned char spec_type;
 625     COLORREF nearest;
 626     DC          *dc;
 627
 628     if (!(dc = DC_GetDCPtr( hdc ))) return CLR_INVALID;
 629
 630     if (dc->funcs->pGetNearestColor)
 631     {
 632         nearest = dc->funcs->pGetNearestColor( dc->physDev, color );
 633         GDI_ReleaseObj( hdc );
 634         return nearest;
 635     }
 636
 637     if (!(GetDeviceCaps(hdc, RASTERCAPS) & RC_PALETTE))
 638     {
 639         GDI_ReleaseObj( hdc );
 640         return color;
 641     }
 642
 643     spec_type = color >> 24;
 644     if (spec_type == 1 || spec_type == 2)
 645     {
 646         /* we need logical palette for PALETTERGB and PALETTEINDEX colorrefs */
 647
 648         UINT index;
 649         PALETTEENTRY entry;
 650         HPALETTE hpal = dc->hPalette ? dc->hPalette : GetStockObject( DEFAULT_PALETTE );
 651
 652         if (spec_type == 2) /* PALETTERGB */
 653             index = GetNearestPaletteIndex( hpal, color );
 654         else  /* PALETTEINDEX */
 655             index = LOWORD(color);
 656
 657         if (!GetPaletteEntries( hpal, index, 1, &entry ))
 658         {
 659             WARN("RGB(%lx) : idx %d is out of bounds, assuming NULL\n", color, index );
 660             if (!GetPaletteEntries( hpal, 0, 1, &entry ))
 661             {
 662                 GDI_ReleaseObj( hdc );
 663                 return CLR_INVALID;
 664             }
 665         }
 666         color = RGB( entry.peRed, entry.peGreen, entry.peBlue );
 667     }
 668     nearest = color & 0x00ffffff;
 669     GDI_ReleaseObj( hdc );
 670
 671     TRACE("(%06lx): returning %06lx\n", color, nearest );
 672     return nearest;
 673 }
 674
 675
 676 /***********************************************************************
 677  *           PALETTE_GetObject
 678  */
 679 static INT PALETTE_GetObject( HGDIOBJ handle, void *obj, INT count, LPVOID buffer )
 680 {
 681     PALETTEOBJ *palette = obj;
 682
 683     if( !buffer )
 684         return sizeof(WORD);
 685
 686     if (count > sizeof(WORD)) count = sizeof(WORD);
 687     memcpy( buffer, &palette->logpalette.palNumEntries, count );
 688     return count;
 689 }
 690
 691
 692 /***********************************************************************
 693  *           PALETTE_UnrealizeObject
 694  */
 695 static BOOL PALETTE_UnrealizeObject( HGDIOBJ handle, void *obj )
 696 {
 697     PALETTEOBJ *palette = obj;
 698
 699     HeapFree( GetProcessHeap(), 0, palette->mapping );
 700     palette->mapping = NULL;
 701
 702     if (hLastRealizedPalette == handle)
 703     {
 704         TRACE("unrealizing palette %p\n", handle);
 705         hLastRealizedPalette = 0;
 706         pLastRealizedDC = NULL;
 707     }
 708     return TRUE;
 709 }
 710
 711
 712 /***********************************************************************
 713  *           PALETTE_DeleteObject
 714  */
 715 static BOOL PALETTE_DeleteObject( HGDIOBJ handle, void *obj )
 716 {
 717     PALETTEOBJ *palette = obj;
 718
 719     HeapFree( GetProcessHeap(), 0, palette->mapping );
 720     if (hLastRealizedPalette == handle)
 721     {
 722         TRACE("unrealizing palette %p\n", handle);
 723         hLastRealizedPalette = 0;
 724         pLastRealizedDC = NULL;
 725     }
 726     return GDI_FreeObject( handle, obj );
 727 }
 728
 729
 730 /***********************************************************************
 731  *           GDISelectPalette    (Not a Windows API)
 732  */
 733 HPALETTE WINAPI GDISelectPalette( HDC hdc, HPALETTE hpal, WORD wBkg)
 734 {
 735     HPALETTE ret;
 736     DC *dc;
 737
 738     TRACE("%p %p\n", hdc, hpal );
 739
 740     if (GetObjectType(hpal) != OBJ_PAL)
 741     {
 742       WARN("invalid selected palette %p\n",hpal);
 743       return 0;
 744     }
 745     if (!(dc = DC_GetDCPtr( hdc ))) return 0;
 746     ret = dc->hPalette;
 747     if (dc->funcs->pSelectPalette) hpal = dc->funcs->pSelectPalette( dc->physDev, hpal, FALSE );
 748     if (hpal)
 749     {
 750         dc->hPalette = hpal;
 751         if (!wBkg) hPrimaryPalette = hpal;
 752     }
 753     else ret = 0;
 754     GDI_ReleaseObj( hdc );
 755     return ret;
 756 }
 757
 758
 759 /***********************************************************************
 760  *           GDIRealizePalette    (Not a Windows API)
 761  */
 762 UINT WINAPI GDIRealizePalette( HDC hdc )
 763 {
 764     UINT realized = 0;
 765     DC* dc = DC_GetDCPtr( hdc );
 766
 767     if (!dc) return 0;
 768
 769     TRACE("%p...\n", hdc );
 770
 771     if( dc->hPalette == GetStockObject( DEFAULT_PALETTE ))
 772     {
 773         if (dc->funcs->pRealizeDefaultPalette)
 774             realized = dc->funcs->pRealizeDefaultPalette( dc->physDev );
 775     }
 776     else if(dc->hPalette != hLastRealizedPalette )
 777     {
 778         if (dc->funcs->pRealizePalette)
 779             realized = dc->funcs->pRealizePalette( dc->physDev, dc->hPalette,
 780                                                    (dc->hPalette == hPrimaryPalette) );
 781         hLastRealizedPalette = dc->hPalette;
 782         pLastRealizedDC = dc->funcs;
 783     }
 784     else TRACE("  skipping (hLastRealizedPalette = %p)\n", hLastRealizedPalette);
 785
 786     GDI_ReleaseObj( hdc );
 787     TRACE("   realized %i colors.\n", realized );
 788     return realized;
 789 }
 790
 791
 792 /***********************************************************************
 793  *           RealizeDefaultPalette    (GDI.365)
 794  */
 795 UINT16 WINAPI RealizeDefaultPalette16( HDC16 hdc )
 796 {
 797     UINT16 ret = 0;
 798     DC          *dc;
 799
 800     TRACE("%04x\n", hdc );
 801
 802     if (!(dc = DC_GetDCPtr( HDC_32(hdc) ))) return 0;
 803
 804     if (dc->funcs->pRealizeDefaultPalette) ret = dc->funcs->pRealizeDefaultPalette( dc->physDev );
 805     GDI_ReleaseObj( HDC_32(hdc) );
 806     return ret;
 807 }
 808
 809 /***********************************************************************
 810  *           IsDCCurrentPalette   (GDI.412)
 811  */
 812 BOOL16 WINAPI IsDCCurrentPalette16(HDC16 hDC)
 813 {
 814     DC *dc = DC_GetDCPtr( HDC_32(hDC) );
 815     if (dc)
 816     {
 817       BOOL bRet = dc->hPalette == hPrimaryPalette;
 818       GDI_ReleaseObj( HDC_32(hDC) );
 819       return bRet;
 820     }
 821     return FALSE;
 822 }
 823
 824
 825 /***********************************************************************
 826  * SelectPalette [GDI32.@]
 827  *
 828  * Selects logical palette into DC.
 829  *
 830  * RETURNS
 831  *    Success: Previous logical palette
 832  *    Failure: NULL
 833  */
 834 HPALETTE WINAPI SelectPalette(
 835     HDC hDC,               /* [in] Handle of device context */
 836     HPALETTE hPal,         /* [in] Handle of logical color palette */
 837     BOOL bForceBackground) /* [in] Foreground/background mode */
 838 {
 839     return pfnSelectPalette( hDC, hPal, bForceBackground );
 840 }
 841
 842
 843 /***********************************************************************
 844  * RealizePalette [GDI32.@]
 845  *
 846  * Maps palette entries to system palette.
 847  *
 848  * RETURNS
 849  *    Success: Number of entries in logical palette
 850  *    Failure: GDI_ERROR
 851  */
 852 UINT WINAPI RealizePalette(
 853     HDC hDC) /* [in] Handle of device context */
 854 {
 855     return pfnRealizePalette( hDC );
 856 }
 857
 858
 859 typedef HWND (WINAPI *WindowFromDC_funcptr)( HDC );
 860 typedef BOOL (WINAPI *RedrawWindow_funcptr)( HWND, const RECT *, HRGN, UINT );
 861
 862 /**********************************************************************
 863  * UpdateColors [GDI32.@]
 864  *
 865  * Remaps current colors to logical palette.
 866  *
 867  * RETURNS
 868  *    Success: TRUE
 869  *    Failure: FALSE
 870  */
 871 BOOL WINAPI UpdateColors(
 872     HDC hDC) /* [in] Handle of device context */
 873 {
 874     HMODULE mod;
 875     int size = GetDeviceCaps( hDC, SIZEPALETTE );
 876
 877     if (!size) return 0;
 878
 879     mod = GetModuleHandleA("user32.dll");
 880     if (mod)
 881     {
 882         WindowFromDC_funcptr pWindowFromDC = (WindowFromDC_funcptr)GetProcAddress(mod,"WindowFromDC");
 883         if (pWindowFromDC)
 884         {
 885             HWND hWnd = pWindowFromDC( hDC );
 886
 887             /* Docs say that we have to remap current drawable pixel by pixel
 888              * but it would take forever given the speed of XGet/PutPixel.
 889              */
 890             if (hWnd && size)
 891             {
 892                 RedrawWindow_funcptr pRedrawWindow = GetProcAddress( mod, "RedrawWindow" );
 893                 if (pRedrawWindow) pRedrawWindow( hWnd, NULL, 0, RDW_INVALIDATE );
 894             }
 895         }
 896     }
 897     return 0x666;
 898 }
 899
 900
 901 /*********************************************************************
 902  *           SetMagicColors   (GDI.606)
 903  */
 904 VOID WINAPI SetMagicColors16(HDC16 hDC, COLORREF color, UINT16 index)
 905 {
 906     FIXME("(hDC %04x, color %04x, index %04x): stub\n", hDC, (int)color, index);
 907
 908 }
 909
 910 /**********************************************************************
 911  * GetICMProfileA [GDI32.@]
 912  *
 913  * Returns the filename of the specified device context's color
 914  * management profile, even if color management is not enabled
 915  * for that DC.
 916  *
 917  * RETURNS
 918  *    TRUE if name copied successfully OR lpszFilename is NULL
 919  *    FALSE if the buffer length pointed to by lpcbName is too small
 920  *
 921  * NOTE
 922  *    The buffer length pointed to by lpcbName is ALWAYS updated to
 923  *    the length required regardless of other actions this function
 924  *    may take.
 925  *
 926  * FIXME
 927  *    How does Windows assign these?  Some registry key?
 928  */
 929
 930
 931 /*********************************************************************/
 932
 933 BOOL WINAPI GetICMProfileA(HDC hDC, LPDWORD lpcbName, LPSTR lpszFilename)
 934 {
 935     DWORD callerLen;
 936     static const char icm[] = "winefake.icm";
 937
 938     FIXME("(%p, %p, %p): partial stub\n", hDC, lpcbName, lpszFilename);
 939
 940     callerLen = *lpcbName;
 941
 942     /* all 3 behaviors require the required buffer size to be set */
 943     *lpcbName = sizeof(icm);
 944
 945     /* behavior 1: if lpszFilename is NULL, return size of string and no error */
 946     if (!lpszFilename) return TRUE;
 947
 948     /* behavior 2: if buffer size too small, return size of string and error */
 949     if (callerLen < sizeof(icm))
 950     {
 951         SetLastError(ERROR_INSUFFICIENT_BUFFER);
 952         return FALSE;
 953     }
 954
 955     /* behavior 3: if buffer size OK and pointer not NULL, copy and return size */
 956     memcpy(lpszFilename, icm, sizeof(icm));
 957     return TRUE;
 958 }
 959
 960 BOOL WINAPI GetICMProfileW(HDC hDC, LPDWORD lpcbName, LPWSTR lpszFilename)
 961 {
 962     DWORD callerLen;
 963     static const WCHAR icm[] = { 'w','i','n','e','f','a','k','e','.','i','c','m', 0 };
 964
 965     FIXME("(%p, %p, %p): partial stub\n", hDC, lpcbName, lpszFilename);
 966
 967     callerLen = *lpcbName;
 968
 969     /* all 3 behaviors require the required buffer size to be set */
 970     *lpcbName = sizeof(icm) / sizeof(WCHAR);
 971
 972     /* behavior 1: if lpszFilename is NULL, return size of string and no error */
 973     if (!lpszFilename) return TRUE;
 974
 975     /* behavior 2: if buffer size too small, return size of string and error */
 976     if (callerLen < sizeof(icm)/sizeof(WCHAR))
 977     {
 978         SetLastError(ERROR_INSUFFICIENT_BUFFER);
 979         return FALSE;
 980     }
 981
 982     /* behavior 3: if buffer size OK and pointer not NULL, copy and return size */
 983     memcpy(lpszFilename, icm, sizeof(icm));
 984     return TRUE;
 985 }
 986
 987 /**********************************************************************
 988  * SetICMProfileA [GDI32.@]
 989  *
 990  */
 991 BOOL WINAPI SetICMProfileA(HDC hDC, LPSTR lpszFilename)
 992 {
 993     FIXME("hDC %p filename '%s': stub!\n", hDC, debugstr_a(lpszFilename));
 994     return TRUE; /* success */
 995 }
 996
 997 /**********************************************************************
 998  * SetICMProfileA [GDI32.@]
 999  *
1000  */
1001 BOOL WINAPI SetICMProfileW(HDC hDC, LPWSTR lpszFilename)
1002 {
1003     FIXME("hDC %p filename '%s': stub!\n", hDC, debugstr_w(lpszFilename));
1004     return TRUE; /* success */
1005 }
1006
1007 /**********************************************************************
1008  * UpdateICMRegKeyA [GDI32.@]
1009  *
1010  */
1011 BOOL WINAPI UpdateICMRegKeyA(DWORD dwReserved, LPSTR lpszCMID, LPSTR lpszFileName, UINT nCommand)
1012 {
1013     FIXME("(0x%08lx, %s, %s, 0x%08x): stub!\n", dwReserved, debugstr_a(lpszCMID),
1014           debugstr_a(lpszFileName), nCommand);
1015     return TRUE; /* success */
1016 }
1017
1018 /**********************************************************************
1019  * UpdateICMRegKeyW [GDI32.@]
1020  *
1021  */
1022 BOOL WINAPI UpdateICMRegKeyW(DWORD dwReserved, LPWSTR lpszCMID, LPWSTR lpszFileName, UINT nCommand)
1023 {
1024     FIXME("(0x%08lx, %s, %s, 0x%08x): stub!\n", dwReserved, debugstr_w(lpszCMID),
1025           debugstr_w(lpszFileName), nCommand);
1026     return TRUE; /* success */
1027 }