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/*
* Color functions
*
* Copyright 1993 Alexandre Julliard
* Copyright 1996 Alex Korobka
*/
#include "color.h"
#include "debugtools.h"
#include "palette.h"
#include "windef.h"
DEFAULT_DEBUG_CHANNEL(palette)
/***********************************************************************
* System color space.
*
* First 10 and last 10 colors in COLOR_sysPalette are
* "guarded". RealizePalette changes only the rest of colorcells. For
* currently inactive window it changes only DC palette mappings.
*/
PALETTEENTRY *COLOR_sysPal = NULL; /* current system palette */
int COLOR_gapStart = 256;
int COLOR_gapEnd = -1;
int COLOR_gapFilled = 0;
int COLOR_max = 256;
const PALETTEENTRY COLOR_sysPalTemplate[NB_RESERVED_COLORS] =
{
/* first 10 entries in the system palette */
/* red green blue flags */
{ 0x00, 0x00, 0x00, PC_SYS_USED },
{ 0x80, 0x00, 0x00, PC_SYS_USED },
{ 0x00, 0x80, 0x00, PC_SYS_USED },
{ 0x80, 0x80, 0x00, PC_SYS_USED },
{ 0x00, 0x00, 0x80, PC_SYS_USED },
{ 0x80, 0x00, 0x80, PC_SYS_USED },
{ 0x00, 0x80, 0x80, PC_SYS_USED },
{ 0xc0, 0xc0, 0xc0, PC_SYS_USED },
{ 0xc0, 0xdc, 0xc0, PC_SYS_USED },
{ 0xa6, 0xca, 0xf0, PC_SYS_USED },
/* ... c_min/2 dynamic colorcells */
/* ... gap (for sparse palettes) */
/* ... c_min/2 dynamic colorcells */
{ 0xff, 0xfb, 0xf0, PC_SYS_USED },
{ 0xa0, 0xa0, 0xa4, PC_SYS_USED },
{ 0x80, 0x80, 0x80, PC_SYS_USED },
{ 0xff, 0x00, 0x00, PC_SYS_USED },
{ 0x00, 0xff, 0x00, PC_SYS_USED },
{ 0xff, 0xff, 0x00, PC_SYS_USED },
{ 0x00, 0x00, 0xff, PC_SYS_USED },
{ 0xff, 0x00, 0xff, PC_SYS_USED },
{ 0x00, 0xff, 0xff, PC_SYS_USED },
{ 0xff, 0xff, 0xff, PC_SYS_USED } /* last 10 */
};
/***********************************************************************
* COLOR_GetSystemPaletteTemplate
*/
const PALETTEENTRY* COLOR_GetSystemPaletteTemplate(void)
{
return COLOR_sysPalTemplate;
}
/***********************************************************************
* COLOR_GetSystemPaletteEntry
*/
COLORREF COLOR_GetSystemPaletteEntry(UINT i)
{
return *(COLORREF*)(COLOR_sysPal + i) & 0x00ffffff;
}
/***********************************************************************
* COLOR_IsSolid
*
* Check whether 'color' can be represented with a solid color.
*/
BOOL COLOR_IsSolid( COLORREF color )
{
int i;
const PALETTEENTRY *pEntry = COLOR_sysPal;
if (color & 0xff000000) return TRUE; /* indexed color */
if (!color || (color == 0xffffff)) return TRUE; /* black or white */
for (i = 0; i < 256 ; i++, pEntry++)
{
if( i < COLOR_gapStart || i > COLOR_gapEnd )
if ((GetRValue(color) == pEntry->peRed) &&
(GetGValue(color) == pEntry->peGreen) &&
(GetBValue(color) == pEntry->peBlue)) return TRUE;
}
return FALSE;
}
/***********************************************************************
* COLOR_PaletteLookupPixel
*/
int COLOR_PaletteLookupPixel( PALETTEENTRY* palPalEntry, int size,
int* mapping, COLORREF col, BOOL skipReserved )
{
int i, best = 0, diff = 0x7fffffff;
int r,g,b;
for( i = 0; i < size && diff ; i++ )
{
if( !(palPalEntry[i].peFlags & PC_SYS_USED) ||
(skipReserved && palPalEntry[i].peFlags & PC_SYS_RESERVED) )
continue;
r = palPalEntry[i].peRed - GetRValue(col);
g = palPalEntry[i].peGreen - GetGValue(col);
b = palPalEntry[i].peBlue - GetBValue(col);
r = r*r + g*g + b*b;
if( r < diff ) { best = i; diff = r; }
}
return (mapping) ? mapping[best] : best;
}
/***********************************************************************
* COLOR_PaletteLookupExactIndex
*/
int COLOR_PaletteLookupExactIndex( PALETTEENTRY* palPalEntry, int size,
COLORREF col )
{
int i;
BYTE r = GetRValue(col), g = GetGValue(col), b = GetBValue(col);
for( i = 0; i < size; i++ )
{
if( palPalEntry[i].peFlags & PC_SYS_USED ) /* skips gap */
if( palPalEntry[i].peRed == r &&
palPalEntry[i].peGreen == g &&
palPalEntry[i].peBlue == b )
return i;
}
return -1;
}
/***********************************************************************
* COLOR_LookupNearestColor
*/
COLORREF COLOR_LookupNearestColor( PALETTEENTRY* palPalEntry, int size, COLORREF color )
{
unsigned char spec_type = color >> 24;
int i;
/* we need logical palette for PALETTERGB and PALETTEINDEX colorrefs */
if( spec_type == 2 ) /* PALETTERGB */
color = *(COLORREF*)
(palPalEntry + COLOR_PaletteLookupPixel(palPalEntry,size,NULL,color,FALSE));
else if( spec_type == 1 ) /* PALETTEINDEX */
{
if( (i = color & 0x0000ffff) >= size )
{
WARN("RGB(%lx) : idx %d is out of bounds, assuming NULL\n", color, i);
color = *(COLORREF*)palPalEntry;
}
else color = *(COLORREF*)(palPalEntry + i);
}
color &= 0x00ffffff;
return (0x00ffffff & *(COLORREF*)
(COLOR_sysPal + COLOR_PaletteLookupPixel(COLOR_sysPal, 256, NULL, color, FALSE)));
}
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