4 * Copyright 1993 Alexandre Julliard
5 * Copyright 1996 Alex Korobka
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.
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.
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
23 #include "wine/debug.h"
27 WINE_DEFAULT_DEBUG_CHANNEL(palette);
30 /***********************************************************************
33 * First 10 and last 10 colors in COLOR_sysPalette are
34 * "guarded". RealizePalette changes only the rest of colorcells. For
35 * currently inactive window it changes only DC palette mappings.
38 PALETTEENTRY *COLOR_sysPal = NULL; /* current system palette */
40 int COLOR_gapStart = 256;
41 int COLOR_gapEnd = -1;
42 int COLOR_gapFilled = 0;
45 const PALETTEENTRY COLOR_sysPalTemplate[NB_RESERVED_COLORS] =
47 /* first 10 entries in the system palette */
48 /* red green blue flags */
49 { 0x00, 0x00, 0x00, PC_SYS_USED },
50 { 0x80, 0x00, 0x00, PC_SYS_USED },
51 { 0x00, 0x80, 0x00, PC_SYS_USED },
52 { 0x80, 0x80, 0x00, PC_SYS_USED },
53 { 0x00, 0x00, 0x80, PC_SYS_USED },
54 { 0x80, 0x00, 0x80, PC_SYS_USED },
55 { 0x00, 0x80, 0x80, PC_SYS_USED },
56 { 0xc0, 0xc0, 0xc0, PC_SYS_USED },
57 { 0xc0, 0xdc, 0xc0, PC_SYS_USED },
58 { 0xa6, 0xca, 0xf0, PC_SYS_USED },
60 /* ... c_min/2 dynamic colorcells */
62 /* ... gap (for sparse palettes) */
64 /* ... c_min/2 dynamic colorcells */
66 { 0xff, 0xfb, 0xf0, PC_SYS_USED },
67 { 0xa0, 0xa0, 0xa4, PC_SYS_USED },
68 { 0x80, 0x80, 0x80, PC_SYS_USED },
69 { 0xff, 0x00, 0x00, PC_SYS_USED },
70 { 0x00, 0xff, 0x00, PC_SYS_USED },
71 { 0xff, 0xff, 0x00, PC_SYS_USED },
72 { 0x00, 0x00, 0xff, PC_SYS_USED },
73 { 0xff, 0x00, 0xff, PC_SYS_USED },
74 { 0x00, 0xff, 0xff, PC_SYS_USED },
75 { 0xff, 0xff, 0xff, PC_SYS_USED } /* last 10 */
78 /***********************************************************************
79 * COLOR_GetSystemPaletteTemplate
81 const PALETTEENTRY* COLOR_GetSystemPaletteTemplate(void)
83 return COLOR_sysPalTemplate;
86 /***********************************************************************
87 * COLOR_GetSystemPaletteEntry
90 COLORREF COLOR_GetSystemPaletteEntry(UINT i)
92 return *(COLORREF*)(COLOR_sysPal + i) & 0x00ffffff;
95 /***********************************************************************
98 * Check whether 'color' can be represented with a solid color.
100 BOOL COLOR_IsSolid( COLORREF color )
103 const PALETTEENTRY *pEntry = COLOR_sysPal;
105 if (color & 0xff000000) return TRUE; /* indexed color */
107 if (!color || (color == 0xffffff)) return TRUE; /* black or white */
109 for (i = 0; i < 256 ; i++, pEntry++)
111 if( i < COLOR_gapStart || i > COLOR_gapEnd )
112 if ((GetRValue(color) == pEntry->peRed) &&
113 (GetGValue(color) == pEntry->peGreen) &&
114 (GetBValue(color) == pEntry->peBlue)) return TRUE;
119 /***********************************************************************
120 * COLOR_PaletteLookupPixel
122 int COLOR_PaletteLookupPixel( PALETTEENTRY* palPalEntry, int size,
123 int* mapping, COLORREF col, BOOL skipReserved )
125 int i, best = 0, diff = 0x7fffffff;
128 for( i = 0; i < size && diff ; i++ )
130 if( !(palPalEntry[i].peFlags & PC_SYS_USED) ||
131 (skipReserved && palPalEntry[i].peFlags & PC_SYS_RESERVED) )
134 r = palPalEntry[i].peRed - GetRValue(col);
135 g = palPalEntry[i].peGreen - GetGValue(col);
136 b = palPalEntry[i].peBlue - GetBValue(col);
140 if( r < diff ) { best = i; diff = r; }
142 return (mapping) ? mapping[best] : best;
145 /***********************************************************************
146 * COLOR_PaletteLookupExactIndex
148 int COLOR_PaletteLookupExactIndex( PALETTEENTRY* palPalEntry, int size,
152 BYTE r = GetRValue(col), g = GetGValue(col), b = GetBValue(col);
153 for( i = 0; i < size; i++ )
155 if( palPalEntry[i].peFlags & PC_SYS_USED ) /* skips gap */
156 if( palPalEntry[i].peRed == r &&
157 palPalEntry[i].peGreen == g &&
158 palPalEntry[i].peBlue == b )
164 /***********************************************************************
165 * COLOR_LookupNearestColor
167 COLORREF COLOR_LookupNearestColor( PALETTEENTRY* palPalEntry, int size, COLORREF color )
169 unsigned char spec_type = color >> 24;
172 /* we need logical palette for PALETTERGB and PALETTEINDEX colorrefs */
174 if( spec_type == 2 ) /* PALETTERGB */
176 (palPalEntry + COLOR_PaletteLookupPixel(palPalEntry,size,NULL,color,FALSE));
178 else if( spec_type == 1 ) /* PALETTEINDEX */
180 if( (i = color & 0x0000ffff) >= size )
182 WARN("RGB(%lx) : idx %d is out of bounds, assuming NULL\n", color, i);
183 color = *(COLORREF*)palPalEntry;
185 else color = *(COLORREF*)(palPalEntry + i);
189 return (0x00ffffff & *(COLORREF*)
190 (COLOR_sysPal + COLOR_PaletteLookupPixel(COLOR_sysPal, 256, NULL, color, FALSE)));