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 <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         if (!SetPaletteEntries( hPal, StartIndex, NumEntries, PaletteColors )) return FALSE;
 450
 451         if (pLastRealizedDC && pLastRealizedDC->pRealizePalette)
 452             pLastRealizedDC->pRealizePalette( NULL, hPal, hPal == hPrimaryPalette );
 453     }
 454     return TRUE;
 455 }
 456
 457
 458 /***********************************************************************
 459  * SetSystemPaletteUse [GDI32.@]
 460  *
 461  * RETURNS
 462  *    Success: Previous system palette
 463  *    Failure: SYSPAL_ERROR
 464  */
 465 UINT WINAPI SetSystemPaletteUse(
 466     HDC hdc,  /* [in] Handle of device context */
 467     UINT use) /* [in] Palette-usage flag */
 468 {
 469     UINT old = SystemPaletteUse;
 470
 471     /* Device doesn't support colour palettes */
 472     if (!(GetDeviceCaps(hdc, RASTERCAPS) & RC_PALETTE)) {
 473         return SYSPAL_ERROR;
 474     }
 475
 476     switch (use) {
 477         case SYSPAL_NOSTATIC:
 478         case SYSPAL_NOSTATIC256:        /* WINVER >= 0x0500 */
 479         case SYSPAL_STATIC:
 480             SystemPaletteUse = use;
 481             return old;
 482         default:
 483             return SYSPAL_ERROR;
 484     }
 485 }
 486
 487
 488 /***********************************************************************
 489  * GetSystemPaletteUse [GDI32.@]
 490  *
 491  * Gets state of system palette.
 492  *
 493  * RETURNS
 494  *    Current state of system palette
 495  */
 496 UINT WINAPI GetSystemPaletteUse(
 497     HDC hdc) /* [in] Handle of device context */
 498 {
 499     return SystemPaletteUse;
 500 }
 501
 502
 503 /***********************************************************************
 504  * GetSystemPaletteEntries [GDI32.@]
 505  *
 506  * Gets range of palette entries.
 507  *
 508  * RETURNS
 509  *    Success: Number of entries retrieved from palette
 510  *    Failure: 0
 511  */
 512 UINT WINAPI GetSystemPaletteEntries(
 513     HDC hdc,              /* [in]  Handle of device context */
 514     UINT start,           /* [in]  Index of first entry to be retrieved */
 515     UINT count,           /* [in]  Number of entries to be retrieved */
 516     LPPALETTEENTRY entries) /* [out] Array receiving system-palette entries */
 517 {
 518     UINT ret = 0;
 519     DC *dc;
 520
 521     TRACE("hdc=%p,start=%i,count=%i\n", hdc,start,count);
 522
 523     if ((dc = DC_GetDCPtr( hdc )))
 524     {
 525         if (dc->funcs->pGetSystemPaletteEntries)
 526             ret = dc->funcs->pGetSystemPaletteEntries( dc->physDev, start, count, entries );
 527         GDI_ReleaseObj( hdc );
 528     }
 529     return ret;
 530 }
 531
 532
 533 /***********************************************************************
 534  * GetNearestPaletteIndex [GDI32.@]
 535  *
 536  * Gets palette index for color.
 537  *
 538  * NOTES
 539  *    Should index be initialized to CLR_INVALID instead of 0?
 540  *
 541  * RETURNS
 542  *    Success: Index of entry in logical palette
 543  *    Failure: CLR_INVALID
 544  */
 545 UINT WINAPI GetNearestPaletteIndex(
 546     HPALETTE hpalette, /* [in] Handle of logical color palette */
 547     COLORREF color)      /* [in] Color to be matched */
 548 {
 549     PALETTEOBJ* palObj = (PALETTEOBJ*)GDI_GetObjPtr( hpalette, PALETTE_MAGIC );
 550     UINT index  = 0;
 551
 552     if( palObj )
 553     {
 554         int i, diff = 0x7fffffff;
 555         int r,g,b;
 556         PALETTEENTRY* entry = palObj->logpalette.palPalEntry;
 557
 558         for( i = 0; i < palObj->logpalette.palNumEntries && diff ; i++, entry++)
 559         {
 560             if (!(entry->peFlags & PC_SYS_USED)) continue;
 561
 562             r = entry->peRed - GetRValue(color);
 563             g = entry->peGreen - GetGValue(color);
 564             b = entry->peBlue - GetBValue(color);
 565
 566             r = r*r + g*g + b*b;
 567
 568             if( r < diff ) { index = i; diff = r; }
 569         }
 570         GDI_ReleaseObj( hpalette );
 571     }
 572     TRACE("(%p,%06lx): returning %d\n", hpalette, color, index );
 573     return index;
 574 }
 575
 576
 577 /***********************************************************************
 578  * GetNearestColor [GDI32.@]
 579  *
 580  * Gets a system color to match.
 581  *
 582  * RETURNS
 583  *    Success: Color from system palette that corresponds to given color
 584  *    Failure: CLR_INVALID
 585  */
 586 COLORREF WINAPI GetNearestColor(
 587     HDC hdc,      /* [in] Handle of device context */
 588     COLORREF color) /* [in] Color to be matched */
 589 {
 590     unsigned char spec_type;
 591     COLORREF nearest;
 592     DC          *dc;
 593
 594     if (!(dc = DC_GetDCPtr( hdc ))) return CLR_INVALID;
 595
 596     if (dc->funcs->pGetNearestColor)
 597     {
 598         nearest = dc->funcs->pGetNearestColor( dc->physDev, color );
 599         GDI_ReleaseObj( hdc );
 600         return nearest;
 601     }
 602
 603     if (!(GetDeviceCaps(hdc, RASTERCAPS) & RC_PALETTE))
 604     {
 605         GDI_ReleaseObj( hdc );
 606         return color;
 607     }
 608
 609     spec_type = color >> 24;
 610     if (spec_type == 1 || spec_type == 2)
 611     {
 612         /* we need logical palette for PALETTERGB and PALETTEINDEX colorrefs */
 613
 614         UINT index;
 615         PALETTEENTRY entry;
 616         HPALETTE hpal = dc->hPalette ? dc->hPalette : GetStockObject( DEFAULT_PALETTE );
 617
 618         if (spec_type == 2) /* PALETTERGB */
 619             index = GetNearestPaletteIndex( hpal, color );
 620         else  /* PALETTEINDEX */
 621             index = LOWORD(color);
 622
 623         if (!GetPaletteEntries( hpal, index, 1, &entry ))
 624         {
 625             WARN("RGB(%lx) : idx %d is out of bounds, assuming NULL\n", color, index );
 626             if (!GetPaletteEntries( hpal, 0, 1, &entry ))
 627             {
 628                 GDI_ReleaseObj( hdc );
 629                 return CLR_INVALID;
 630             }
 631         }
 632         color = RGB( entry.peRed, entry.peGreen, entry.peBlue );
 633     }
 634     nearest = color & 0x00ffffff;
 635     GDI_ReleaseObj( hdc );
 636
 637     TRACE("(%06lx): returning %06lx\n", color, nearest );
 638     return nearest;
 639 }
 640
 641
 642 /***********************************************************************
 643  *           PALETTE_GetObject
 644  */
 645 static INT PALETTE_GetObject( HGDIOBJ handle, void *obj, INT count, LPVOID buffer )
 646 {
 647     PALETTEOBJ *palette = obj;
 648
 649     if( !buffer )
 650         return sizeof(WORD);
 651
 652     if (count > sizeof(WORD)) count = sizeof(WORD);
 653     memcpy( buffer, &palette->logpalette.palNumEntries, count );
 654     return count;
 655 }
 656
 657
 658 /***********************************************************************
 659  *           PALETTE_UnrealizeObject
 660  */
 661 static BOOL PALETTE_UnrealizeObject( HGDIOBJ handle, void *obj )
 662 {
 663     PALETTEOBJ *palette = obj;
 664
 665     if (palette->mapping)
 666     {
 667         HeapFree( GetProcessHeap(), 0, palette->mapping );
 668         palette->mapping = NULL;
 669     }
 670     if (hLastRealizedPalette == handle)
 671     {
 672         hLastRealizedPalette = 0;
 673         pLastRealizedDC = NULL;
 674     }
 675     return TRUE;
 676 }
 677
 678
 679 /***********************************************************************
 680  *           PALETTE_DeleteObject
 681  */
 682 static BOOL PALETTE_DeleteObject( HGDIOBJ handle, void *obj )
 683 {
 684     PALETTEOBJ *palette = obj;
 685
 686     HeapFree( GetProcessHeap(), 0, palette->mapping );
 687     if (hLastRealizedPalette == handle)
 688     {
 689         hLastRealizedPalette = 0;
 690         pLastRealizedDC = NULL;
 691     }
 692     return GDI_FreeObject( handle, obj );
 693 }
 694
 695
 696 /***********************************************************************
 697  *           GDISelectPalette    (Not a Windows API)
 698  */
 699 HPALETTE WINAPI GDISelectPalette( HDC hdc, HPALETTE hpal, WORD wBkg)
 700 {
 701     HPALETTE ret;
 702     DC *dc;
 703
 704     TRACE("%p %p\n", hdc, hpal );
 705
 706     if (GetObjectType(hpal) != OBJ_PAL)
 707     {
 708       WARN("invalid selected palette %p\n",hpal);
 709       return 0;
 710     }
 711     if (!(dc = DC_GetDCPtr( hdc ))) return 0;
 712     ret = dc->hPalette;
 713     if (dc->funcs->pSelectPalette) hpal = dc->funcs->pSelectPalette( dc->physDev, hpal, FALSE );
 714     if (hpal)
 715     {
 716         dc->hPalette = hpal;
 717         if (!wBkg) hPrimaryPalette = hpal;
 718     }
 719     else ret = 0;
 720     GDI_ReleaseObj( hdc );
 721     return ret;
 722 }
 723
 724
 725 /***********************************************************************
 726  *           GDIRealizePalette    (Not a Windows API)
 727  */
 728 UINT WINAPI GDIRealizePalette( HDC hdc )
 729 {
 730     UINT realized = 0;
 731     DC* dc = DC_GetDCPtr( hdc );
 732
 733     if (!dc) return 0;
 734
 735     TRACE("%p...\n", hdc );
 736
 737     if( dc->hPalette == GetStockObject( DEFAULT_PALETTE ))
 738     {
 739         if (dc->funcs->pRealizeDefaultPalette)
 740             realized = dc->funcs->pRealizeDefaultPalette( dc->physDev );
 741     }
 742     else if(dc->hPalette != hLastRealizedPalette )
 743     {
 744         if (dc->funcs->pRealizePalette)
 745             realized = dc->funcs->pRealizePalette( dc->physDev, dc->hPalette,
 746                                                    (dc->hPalette == hPrimaryPalette) );
 747         hLastRealizedPalette = dc->hPalette;
 748         pLastRealizedDC = dc->funcs;
 749     }
 750     else TRACE("  skipping (hLastRealizedPalette = %p)\n", hLastRealizedPalette);
 751
 752     GDI_ReleaseObj( hdc );
 753     TRACE("   realized %i colors.\n", realized );
 754     return realized;
 755 }
 756
 757
 758 /***********************************************************************
 759  *           RealizeDefaultPalette    (GDI.365)
 760  */
 761 UINT16 WINAPI RealizeDefaultPalette16( HDC16 hdc )
 762 {
 763     UINT16 ret = 0;
 764     DC          *dc;
 765
 766     TRACE("%04x\n", hdc );
 767
 768     if (!(dc = DC_GetDCPtr( HDC_32(hdc) ))) return 0;
 769
 770     if (dc->funcs->pRealizeDefaultPalette) ret = dc->funcs->pRealizeDefaultPalette( dc->physDev );
 771     GDI_ReleaseObj( HDC_32(hdc) );
 772     return ret;
 773 }
 774
 775 /***********************************************************************
 776  *           IsDCCurrentPalette   (GDI.412)
 777  */
 778 BOOL16 WINAPI IsDCCurrentPalette16(HDC16 hDC)
 779 {
 780     DC *dc = DC_GetDCPtr( HDC_32(hDC) );
 781     if (dc)
 782     {
 783       BOOL bRet = dc->hPalette == hPrimaryPalette;
 784       GDI_ReleaseObj( HDC_32(hDC) );
 785       return bRet;
 786     }
 787     return FALSE;
 788 }
 789
 790
 791 /***********************************************************************
 792  * SelectPalette [GDI32.@]
 793  *
 794  * Selects logical palette into DC.
 795  *
 796  * RETURNS
 797  *    Success: Previous logical palette
 798  *    Failure: NULL
 799  */
 800 HPALETTE WINAPI SelectPalette(
 801     HDC hDC,               /* [in] Handle of device context */
 802     HPALETTE hPal,         /* [in] Handle of logical color palette */
 803     BOOL bForceBackground) /* [in] Foreground/background mode */
 804 {
 805     return pfnSelectPalette( hDC, hPal, bForceBackground );
 806 }
 807
 808
 809 /***********************************************************************
 810  * RealizePalette [GDI32.@]
 811  *
 812  * Maps palette entries to system palette.
 813  *
 814  * RETURNS
 815  *    Success: Number of entries in logical palette
 816  *    Failure: GDI_ERROR
 817  */
 818 UINT WINAPI RealizePalette(
 819     HDC hDC) /* [in] Handle of device context */
 820 {
 821     return pfnRealizePalette( hDC );
 822 }
 823
 824
 825 typedef HWND (WINAPI *WindowFromDC_funcptr)( HDC );
 826 typedef BOOL (WINAPI *RedrawWindow_funcptr)( HWND, const RECT *, HRGN, UINT );
 827
 828 /**********************************************************************
 829  * UpdateColors [GDI32.@]
 830  *
 831  * Remaps current colors to logical palette.
 832  *
 833  * RETURNS
 834  *    Success: TRUE
 835  *    Failure: FALSE
 836  */
 837 BOOL WINAPI UpdateColors(
 838     HDC hDC) /* [in] Handle of device context */
 839 {
 840     HMODULE mod;
 841     int size = GetDeviceCaps( hDC, SIZEPALETTE );
 842
 843     if (!size) return 0;
 844
 845     mod = GetModuleHandleA("user32.dll");
 846     if (mod)
 847     {
 848         WindowFromDC_funcptr pWindowFromDC = (WindowFromDC_funcptr)GetProcAddress(mod,"WindowFromDC");
 849         if (pWindowFromDC)
 850         {
 851             HWND hWnd = pWindowFromDC( hDC );
 852
 853             /* Docs say that we have to remap current drawable pixel by pixel
 854              * but it would take forever given the speed of XGet/PutPixel.
 855              */
 856             if (hWnd && size)
 857             {
 858                 RedrawWindow_funcptr pRedrawWindow = GetProcAddress( mod, "RedrawWindow" );
 859                 if (pRedrawWindow) pRedrawWindow( hWnd, NULL, 0, RDW_INVALIDATE );
 860             }
 861         }
 862     }
 863     return 0x666;
 864 }
 865
 866
 867 /*********************************************************************
 868  *           SetMagicColors   (GDI.606)
 869  */
 870 VOID WINAPI SetMagicColors16(HDC16 hDC, COLORREF color, UINT16 index)
 871 {
 872     FIXME("(hDC %04x, color %04x, index %04x): stub\n", hDC, (int)color, index);
 873
 874 }
 875
 876 /**********************************************************************
 877  * GetICMProfileA [GDI32.@]
 878  *
 879  * Returns the filename of the specified device context's color
 880  * management profile, even if color management is not enabled
 881  * for that DC.
 882  *
 883  * RETURNS
 884  *    TRUE if name copied successfully OR lpszFilename is NULL
 885  *    FALSE if the buffer length pointed to by lpcbName is too small
 886  *
 887  * NOTE
 888  *    The buffer length pointed to by lpcbName is ALWAYS updated to
 889  *    the length required regardless of other actions this function
 890  *    may take.
 891  *
 892  * FIXME
 893  *    How does Windows assign these?  Some registry key?
 894  */
 895
 896 #define WINEICM "winefake.icm"  /* easy-to-identify fake filename */
 897
 898 /*********************************************************************/
 899
 900 BOOL WINAPI GetICMProfileA(HDC hDC, LPDWORD lpcbName, LPSTR lpszFilename)
 901 {
 902     DWORD callerLen;
 903
 904     FIXME("(%p, %p, %p): partial stub\n", hDC, lpcbName, lpszFilename);
 905
 906     callerLen = *lpcbName;
 907
 908     /* all 3 behaviors require the required buffer size to be set */
 909     *lpcbName = strlen(WINEICM);
 910
 911     /* behavior 1: if lpszFilename is NULL, return size of string and no error */
 912     if ((DWORD)lpszFilename == (DWORD)0x00000000)
 913         return TRUE;
 914
 915     /* behavior 2: if buffer size too small, return size of string and error */
 916     if (callerLen < strlen(WINEICM))
 917     {
 918         SetLastError(ERROR_INSUFFICIENT_BUFFER);
 919         return FALSE;
 920     }
 921
 922     /* behavior 3: if buffer size OK and pointer not NULL, copy and return size */
 923     strcpy(lpszFilename, WINEICM);
 924     return TRUE;
 925 }
 926
 927 /**********************************************************************
 928  * SetICMProfileA [GDI32.@]
 929  *
 930  */
 931 BOOL WINAPI SetICMProfileA(HDC hDC, LPSTR lpszFilename)
 932 {
 933     FIXME("hDC %p filename '%s': stub!\n", hDC, debugstr_a(lpszFilename));
 934     return TRUE; /* success */
 935 }