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Sweden-Number/objects/color.c

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/*
* Color functions
*
* Copyright 1993 Alexandre Julliard
* Copyright 1996 Alex Korobka
*/
#include <stdlib.h>
#include <X11/Xlib.h>
#include <stdio.h>
#include <string.h>
#include "windows.h"
#include "options.h"
#include "gdi.h"
#include "color.h"
#include "stddebug.h"
#include "debug.h"
#include "xmalloc.h"
/* Palette indexed mode:
* logical palette -> mapping -> pixel
*
*
* Windows needs contiguous color space ( from 0 to n ) but
* it is possible only with the private colormap. Otherwise we
* have to map DC palette indices to real pixel values. With
* private colormaps it boils down to the identity mapping. The
* other special case is when we have a fixed color visual with
* the screendepth > 8 - we abandon palette mappings altogether
* because pixel values can be calculated without X server
* assistance.
*
* For some info about general Windows palette management read
* http://198.105.232.5/MSDN/LIBRARY/TECHNOTE/CH3.HTM
*/
typedef struct
{
Colormap colorMap;
UINT16 size;
UINT16 flags;
} CSPACE;
static CSPACE cSpace = {0, 0, 0};
static int COLOR_Redshift = 0; /* to handle abortive COLOR_VIRTUAL visuals */
static int COLOR_Redmax = 0;
static int COLOR_Greenshift = 0;
static int COLOR_Greenmax = 0;
static int COLOR_Blueshift = 0;
static int COLOR_Bluemax = 0;
static int COLOR_Graymax = 0;
/* 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.
*/
#define NB_RESERVED_COLORS 20 /* number of fixed colors in system palette */
#define NB_COLORCUBE_START_INDEX 63
Visual* visual = NULL;
static PALETTEENTRY* COLOR_sysPal = NULL; /* current system palette */
static int COLOR_gapStart = 256;
static int COLOR_gapEnd = -1;
static int COLOR_gapFilled = 0;
static int COLOR_max = 256;
/* First free dynamic color cell, 0 = full palette, -1 = fixed palette */
static int COLOR_firstFree = 0;
static unsigned char COLOR_freeList[256];
/* Maps entry in the system palette to X pixel value */
int* COLOR_PaletteToPixel = NULL;
/* Maps pixel to the entry in the system palette */
int* COLOR_PixelToPalette = NULL;
static const PALETTEENTRY __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 */
};
/* Map an EGA index (0..15) to a pixel value in the system color space. */
int COLOR_mapEGAPixel[16];
/***********************************************************************
* Misc auxiliary functions
*/
Colormap COLOR_GetColormap(void)
{
return cSpace.colorMap;
}
UINT16 COLOR_GetSystemPaletteSize(void)
{
return (cSpace.flags & COLOR_PRIVATE) ? cSpace.size : 256;
}
UINT16 COLOR_GetSystemPaletteFlags(void)
{
return cSpace.flags;
}
COLORREF COLOR_GetSystemPaletteEntry(BYTE i)
{
return *(COLORREF*)(COLOR_sysPal + i) & 0x00ffffff;
}
void COLOR_FormatSystemPalette(void)
{
/* Build free list so we'd have an easy way to find
* out if there are any available colorcells.
*/
int i, j = COLOR_firstFree = NB_RESERVED_COLORS/2;
COLOR_sysPal[j].peFlags = 0;
for( i = NB_RESERVED_COLORS/2 + 1 ; i < 256 - NB_RESERVED_COLORS/2 ; i++ )
if( i < COLOR_gapStart || i > COLOR_gapEnd )
{
COLOR_sysPal[i].peFlags = 0; /* unused tag */
COLOR_freeList[j] = i; /* next */
j = i;
}
COLOR_freeList[j] = 0;
}
BOOL32 COLOR_CheckSysColor(COLORREF c)
{
int i;
for( i = 0; i < NB_RESERVED_COLORS; i++ )
if( c == (*(COLORREF*)(__sysPalTemplate + i) & 0x00ffffff) )
return 0;
return 1;
}
void COLOR_FillDefaultColors(void)
{
/* initialize unused entries to what Windows uses as a color
* cube - based on Greg Kreider's code.
*/
int i = 0, idx = 0;
int red, no_r, inc_r;
int green, no_g, inc_g;
int blue, no_b, inc_b;
while (i*i*i < (cSpace.size - NB_RESERVED_COLORS)) i++;
no_r = no_g = no_b = --i;
if ((no_r * (no_g+1) * no_b) < (cSpace.size - NB_RESERVED_COLORS)) no_g++;
if ((no_r * no_g * (no_b+1)) < (cSpace.size - NB_RESERVED_COLORS)) no_b++;
inc_r = (255 - NB_COLORCUBE_START_INDEX)/no_r;
inc_g = (255 - NB_COLORCUBE_START_INDEX)/no_g;
inc_b = (255 - NB_COLORCUBE_START_INDEX)/no_b;
idx = COLOR_firstFree;
if( idx != -1 )
for (blue = NB_COLORCUBE_START_INDEX; blue < 256 && idx; blue += inc_b )
for (green = NB_COLORCUBE_START_INDEX; green < 256 && idx; green += inc_g )
for (red = NB_COLORCUBE_START_INDEX; red < 256 && idx; red += inc_r )
{
/* weird but true */
if( red == NB_COLORCUBE_START_INDEX && green == red && blue == green ) continue;
COLOR_sysPal[idx].peRed = red;
COLOR_sysPal[idx].peGreen = green;
COLOR_sysPal[idx].peBlue = blue;
/* set X color */
if( cSpace.flags & COLOR_VIRTUAL )
{
if (COLOR_Redmax != 255) no_r = (red * COLOR_Redmax) / 255;
if (COLOR_Greenmax != 255) no_g = (green * COLOR_Greenmax) / 255;
if (COLOR_Bluemax != 255) no_b = (blue * COLOR_Bluemax) / 255;
COLOR_PaletteToPixel[idx] = (no_r << COLOR_Redshift) | (no_g << COLOR_Greenshift) | (no_b << COLOR_Blueshift);
}
else if( !(cSpace.flags & COLOR_FIXED) )
{
XColor color = { color.pixel = (COLOR_PaletteToPixel)? COLOR_PaletteToPixel[idx] : idx ,
COLOR_sysPal[idx].peRed << 8,
COLOR_sysPal[idx].peGreen << 8,
COLOR_sysPal[idx].peGreen << 8,
(DoRed | DoGreen | DoBlue) };
XStoreColor(display, cSpace.colorMap, &color);
}
idx = COLOR_freeList[idx];
}
/* try to fill some entries in the "gap" with
* what's already in the colormap - they will be
* mappable to but not changeable. */
if( COLOR_gapStart < COLOR_gapEnd && COLOR_PixelToPalette )
{
XColor xc;
int r, g, b, max;
max = COLOR_max - (256 - (COLOR_gapEnd - COLOR_gapStart));
for ( i = 0, idx = COLOR_gapStart; i < 256 && idx <= COLOR_gapEnd; i++ )
if( COLOR_PixelToPalette[i] == 0 )
{
xc.pixel = i;
XQueryColor(display, cSpace.colorMap, &xc);
r = xc.red>>8; g = xc.green>>8; b = xc.blue>>8;
if( xc.pixel < 256 && COLOR_CheckSysColor(RGB(r, g, b)) &&
XAllocColor(display, cSpace.colorMap, &xc) )
{
COLOR_PixelToPalette[xc.pixel] = idx;
COLOR_PaletteToPixel[idx] = xc.pixel;
*(COLORREF*)(COLOR_sysPal + idx) = RGB(r, g, b);
COLOR_sysPal[idx++].peFlags |= PC_SYS_USED;
if( --max <= 0 ) break;
}
}
COLOR_gapFilled = idx - COLOR_gapStart;
}
}
/***********************************************************************
* COLOR_BuildPrivateMap/COLOR_BuildSharedMap
*
* Allocate colorcells and initialize mapping tables.
*/
static BOOL COLOR_BuildPrivateMap(CSPACE* cs)
{
/* Private colormap - identity mapping */
XColor color;
int i;
COLOR_sysPal = (PALETTEENTRY*)xmalloc(sizeof(PALETTEENTRY)*cs->size);
dprintf_palette(stddeb,"\tbuilding private map - %i palette entries\n", cs->size);
/* Allocate system palette colors */
for( i=0; i < cs->size; i++ )
{
if( i < NB_RESERVED_COLORS/2 )
{
color.red = __sysPalTemplate[i].peRed * 65535 / 255;
color.green = __sysPalTemplate[i].peGreen * 65535 / 255;
color.blue = __sysPalTemplate[i].peBlue * 65535 / 255;
COLOR_sysPal[i] = __sysPalTemplate[i];
}
else if( i >= cs->size - NB_RESERVED_COLORS/2 )
{
int j = NB_RESERVED_COLORS + i - cs->size;
color.red = __sysPalTemplate[j].peRed * 65535 / 255;
color.green = __sysPalTemplate[j].peGreen * 65535 / 255;
color.blue = __sysPalTemplate[j].peBlue * 65535 / 255;
COLOR_sysPal[i] = __sysPalTemplate[j];
}
color.flags = DoRed | DoGreen | DoBlue;
color.pixel = i;
XStoreColor(display, cs->colorMap, &color);
/* Set EGA mapping if color is from the first or last eight */
if (i < 8)
COLOR_mapEGAPixel[i] = color.pixel;
else if (i >= cs->size - 8 )
COLOR_mapEGAPixel[i - (cs->size - 16)] = color.pixel;
}
COLOR_PixelToPalette = COLOR_PaletteToPixel = NULL;
COLOR_gapStart = 256; COLOR_gapEnd = -1;
COLOR_firstFree = (cs->size > NB_RESERVED_COLORS)?NB_RESERVED_COLORS/2 : -1;
return FALSE;
}
static BOOL COLOR_BuildSharedMap(CSPACE* cs)
{
XColor color;
unsigned long sysPixel[NB_RESERVED_COLORS];
unsigned long* pixDynMapping = NULL;
unsigned long plane_masks[1];
int i, j, warn = 0;
int diff, r, g, b, max = 256, bp = 0, wp = 1;
int step = 1;
/* read "AllocSystemColors" from wine.conf */
COLOR_max = PROFILE_GetWineIniInt( "options", "AllocSystemColors", 256);
if (COLOR_max > 256) COLOR_max = 256;
else if (COLOR_max < 20) COLOR_max = 20;
dprintf_palette(stddeb,"COLOR_Init: %d colors configured.\n", COLOR_max);
dprintf_palette(stddeb,"\tbuilding shared map - %i palette entries\n", cs->size);
/* Be nice and allocate system colors as read-only */
for( i = 0; i < NB_RESERVED_COLORS; i++ )
{
color.red = __sysPalTemplate[i].peRed * 65535 / 255;
color.green = __sysPalTemplate[i].peGreen * 65535 / 255;
color.blue = __sysPalTemplate[i].peBlue * 65535 / 255;
color.flags = DoRed | DoGreen | DoBlue;
if (!XAllocColor( display, cSpace.colorMap, &color ))
{
XColor best, c;
if( !warn++ )
{
dprintf_palette(stddeb, "Not enough colors for the full system palette.\n");
bp = BlackPixel(display, DefaultScreen(display));
wp = WhitePixel(display, DefaultScreen(display));
max = (0xffffffff)>>(32 - screenDepth);
if( max > 256 )
{
step = max/256;
max = 256;
}
}
/* reinit color (XAllocColor() may change it)
* and map to the best shared colorcell */
color.red = __sysPalTemplate[i].peRed * 65535 / 255;
color.green = __sysPalTemplate[i].peGreen * 65535 / 255;
color.blue = __sysPalTemplate[i].peBlue * 65535 / 255;
best.pixel = best.red = best.green = best.blue = 0;
for( c.pixel = 0, diff = 0x7fffffff; c.pixel < max; c.pixel += step )
{
XQueryColor(display, cSpace.colorMap, &c);
r = (c.red - color.red)>>8;
g = (c.green - color.green)>>8;
b = (c.blue - color.blue)>>8;
r = r*r + g*g + b*b;
if( r < diff ) { best = c; diff = r; }
}
if( XAllocColor(display, cSpace.colorMap, &best) )
color.pixel = best.pixel;
else color.pixel = (i < NB_RESERVED_COLORS/2)? bp : wp;
}
sysPixel[i] = color.pixel;
dprintf_palette(stddeb,"\tsyscolor(%lx) -> pixel %i\n",
*(COLORREF*)(__sysPalTemplate+i), (int)color.pixel);
/* Set EGA mapping if color in the first or last eight */
if (i < 8)
COLOR_mapEGAPixel[i] = color.pixel;
else if (i >= NB_RESERVED_COLORS - 8 )
COLOR_mapEGAPixel[i - (NB_RESERVED_COLORS-16)] = color.pixel;
}
/* now allocate changeable set */
if( !(cSpace.flags & COLOR_FIXED) )
{
int c_min = 0, c_max = cs->size, c_val;
dprintf_palette(stddeb,"\tdynamic colormap... ");
/* comment this out if you want to debug palette init */
XGrabServer(display);
/* let's become the first client that actually follows
* X guidelines and does binary search...
*/
pixDynMapping = (unsigned long*)xmalloc(sizeof(long)*cs->size);
while( c_max - c_min > 0 )
{
c_val = (c_max + c_min)/2 + (c_max + c_min)%2;
if( !XAllocColorCells(display, cs->colorMap, False,
plane_masks, 0, pixDynMapping, c_val) )
c_max = c_val - 1;
else
{
XFreeColors(display, cs->colorMap, pixDynMapping, c_val, 0);
c_min = c_val;
}
}
if( c_min > COLOR_max - NB_RESERVED_COLORS)
c_min = COLOR_max - NB_RESERVED_COLORS;
c_min = (c_min/2) + (c_min/2); /* need even set for split palette */
if( c_min > 0 )
if( !XAllocColorCells(display, cs->colorMap, False,
plane_masks, 0, pixDynMapping, c_min) )
{
fprintf(stderr,"Inexplicable failure during colorcell allocation.\n");
c_min = 0;
}
cs->size = c_min + NB_RESERVED_COLORS;
XUngrabServer(display);
dprintf_palette(stddeb,"adjusted size %i colorcells\n", cs->size);
}
else if( cSpace.flags & COLOR_VIRTUAL )
{
/* virtual colorspace - ToPhysical takes care of
* color translations but we have to allocate full palette
* to maintain compatibility
*/
cs->size = 256;
dprintf_palette(stddeb,"\tvirtual colorspace - screendepth %i\n", screenDepth);
}
else cs->size = NB_RESERVED_COLORS; /* system palette only - however we can alloc a bunch
* of colors and map to them */
dprintf_palette(stddeb,"Shared system palette uses %i colors.\n", cs->size);
/* set gap to account for pixel shortage. It has to be right in the center
* of the system palette because otherwise raster ops get screwed. */
if( cs->size >= 256 )
{ COLOR_gapStart = 256; COLOR_gapEnd = -1; }
else
{ COLOR_gapStart = cs->size/2; COLOR_gapEnd = 255 - cs->size/2; }
COLOR_firstFree = ( cs->size > NB_RESERVED_COLORS &&
(cs->flags & COLOR_VIRTUAL || !(cs->flags & COLOR_FIXED)) )
? NB_RESERVED_COLORS/2 : -1;
COLOR_sysPal = (PALETTEENTRY*)xmalloc(sizeof(PALETTEENTRY)*256);
/* setup system palette entry <-> pixel mappings and fill in 20 fixed entries */
if( screenDepth <= 8 )
{
COLOR_PixelToPalette = (int*)xmalloc(sizeof(int)*256);
memset( COLOR_PixelToPalette, 0, 256*sizeof(int) );
}
/* for hicolor visuals PaletteToPixel mapping is used to skip
* RGB->pixel calculation in COLOR_ToPhysical().
*/
COLOR_PaletteToPixel = (int*)xmalloc(sizeof(int)*256);
for( i = j = 0; i < 256; i++ )
{
if( i >= COLOR_gapStart && i <= COLOR_gapEnd )
{
COLOR_PaletteToPixel[i] = 0;
COLOR_sysPal[i].peFlags = 0; /* mark as unused */
continue;
}
if( i < NB_RESERVED_COLORS/2 )
{
COLOR_PaletteToPixel[i] = sysPixel[i];
COLOR_sysPal[i] = __sysPalTemplate[i];
}
else if( i >= 256 - NB_RESERVED_COLORS/2 )
{
COLOR_PaletteToPixel[i] = sysPixel[(i + NB_RESERVED_COLORS) - 256];
COLOR_sysPal[i] = __sysPalTemplate[(i + NB_RESERVED_COLORS) - 256];
}
else if( pixDynMapping )
COLOR_PaletteToPixel[i] = pixDynMapping[j++];
else
COLOR_PaletteToPixel[i] = i;
dprintf_palette(stddeb,"\tindex %i -> pixel %i\n", i, COLOR_PaletteToPixel[i]);
if( COLOR_PixelToPalette )
COLOR_PixelToPalette[COLOR_PaletteToPixel[i]] = i;
}
if( pixDynMapping ) free(pixDynMapping);
return TRUE;
}
/***********************************************************************
* COLOR_InitPalette
*
* Create the system palette.
*/
static HPALETTE16 COLOR_InitPalette(void)
{
int i;
HPALETTE16 hpalette;
LOGPALETTE * palPtr;
PALETTEOBJ* palObj;
memset(COLOR_freeList, 0, 256*sizeof(unsigned char));
/* calculate max palette size */
cSpace.size = visual->map_entries;
if (cSpace.flags & COLOR_PRIVATE)
COLOR_BuildPrivateMap( &cSpace );
else
COLOR_BuildSharedMap( &cSpace );
/* Build free list */
if( COLOR_firstFree != -1 )
COLOR_FormatSystemPalette();
COLOR_FillDefaultColors();
/* create default palette (20 system colors) */
palPtr = xmalloc( sizeof(LOGPALETTE) + (NB_RESERVED_COLORS-1)*sizeof(PALETTEENTRY) );
if (!palPtr) return FALSE;
palPtr->palVersion = 0x300;
palPtr->palNumEntries = NB_RESERVED_COLORS;
for( i = 0; i < NB_RESERVED_COLORS; i ++ )
{
palPtr->palPalEntry[i].peRed = __sysPalTemplate[i].peRed;
palPtr->palPalEntry[i].peGreen = __sysPalTemplate[i].peGreen;
palPtr->palPalEntry[i].peBlue = __sysPalTemplate[i].peBlue;
palPtr->palPalEntry[i].peFlags = 0;
}
hpalette = CreatePalette( palPtr );
palObj = (PALETTEOBJ*) GDI_GetObjPtr( hpalette, PALETTE_MAGIC );
palObj->mapping = xmalloc( sizeof(int) * 20 );
free( palPtr );
return hpalette;
}
/***********************************************************************
* COLOR_Computeshifts
*
* Calculate conversion parameters for direct mapped visuals
*/
static void COLOR_Computeshifts(unsigned long maskbits, int *shift, int *max)
{
int i;
if (maskbits==0)
{
*shift=0;
*max=0;
return;
}
for(i=0;!(maskbits&1);i++)
maskbits >>= 1;
*shift = i;
*max = maskbits;
}
/***********************************************************************
* COLOR_Init
*
* Initialize color map and system palette.
*
*/
HPALETTE16 COLOR_Init(void)
{
visual = DefaultVisual( display, DefaultScreen(display) );
dprintf_palette(stddeb,"COLOR_Init: initializing palette manager...");
switch(visual->class)
{
case DirectColor:
cSpace.flags |= COLOR_VIRTUAL;
case GrayScale:
case PseudoColor:
if (Options.usePrivateMap)
{
XSetWindowAttributes win_attr;
cSpace.flags |= COLOR_PRIVATE;
cSpace.colorMap = XCreateColormap( display, rootWindow,
visual, AllocAll );
if (cSpace.colorMap)
{
if( rootWindow != DefaultRootWindow(display) )
{
win_attr.colormap = cSpace.colorMap;
XChangeWindowAttributes( display, rootWindow,
CWColormap, &win_attr );
}
break;
}
}
cSpace.colorMap = DefaultColormapOfScreen( screen );
break;
case StaticGray:
cSpace.colorMap = DefaultColormapOfScreen( screen );
cSpace.flags |= COLOR_FIXED;
COLOR_Graymax = (1<<screenDepth)-1;
break;
case TrueColor:
cSpace.flags |= COLOR_VIRTUAL;
case StaticColor:
cSpace.colorMap = DefaultColormapOfScreen( screen );
cSpace.flags |= COLOR_FIXED;
COLOR_Computeshifts(visual->red_mask, &COLOR_Redshift, &COLOR_Redmax);
COLOR_Computeshifts(visual->green_mask, &COLOR_Greenshift, &COLOR_Greenmax);
COLOR_Computeshifts(visual->blue_mask, &COLOR_Blueshift, &COLOR_Bluemax);
break;
}
dprintf_palette(stddeb," visual class %i\n", visual->class);
return COLOR_InitPalette();
}
/***********************************************************************
* COLOR_Cleanup
*
* Free external colors we grabbed in the FillDefaultPalette()
*/
void COLOR_Cleanup(void)
{
if( COLOR_gapFilled )
XFreeColors(display, cSpace.colorMap,
(unsigned long*)(COLOR_PaletteToPixel + COLOR_gapStart),
COLOR_gapFilled, 0);
}
/***********************************************************************
* COLOR_IsSolid
*
* Check whether 'color' can be represented with a solid color.
*/
BOOL32 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, BOOL32 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_LookupSystemPixel
*/
int COLOR_LookupSystemPixel(COLORREF col)
{
int i, best = 0, diff = 0x7fffffff;
int size = COLOR_GetSystemPaletteSize();
int r,g,b;
for( i = 0; i < size && diff ; i++ )
{
if( i == NB_RESERVED_COLORS/2 ) i = size - NB_RESERVED_COLORS/2;
r = COLOR_sysPal[i].peRed - GetRValue(col);
g = COLOR_sysPal[i].peGreen - GetGValue(col);
b = COLOR_sysPal[i].peBlue - GetBValue(col);
r = r*r + g*g + b*b;
if( r < diff ) { best = i; diff = r; }
}
return (COLOR_PaletteToPixel)? COLOR_PaletteToPixel[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 )
{
fprintf(stderr, "\tRGB(%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)));
}
/***********************************************************************
* COLOR_ToLogical
*
* Return RGB color for given X pixel.
*/
COLORREF COLOR_ToLogical(int pixel)
{
XColor color;
/* truecolor visual */
if (screenDepth >= 24) return pixel;
/* check for hicolor visuals first */
if ( cSpace.flags & COLOR_FIXED && !COLOR_Graymax )
{
color.red = (pixel >> COLOR_Redshift) & COLOR_Redmax;
color.green = (pixel >> COLOR_Greenshift) & COLOR_Greenmax;
color.blue = (pixel >> COLOR_Blueshift) & COLOR_Bluemax;
return RGB((color.red * 255)/COLOR_Redmax,
(color.green * 255)/COLOR_Greenmax,
(color.blue * 255)/COLOR_Bluemax);
}
/* check if we can bypass X */
if ((screenDepth <= 8) && (pixel < 256) &&
!(cSpace.flags & (COLOR_VIRTUAL | COLOR_FIXED)) )
return ( *(COLORREF*)(COLOR_sysPal +
((COLOR_PixelToPalette)?COLOR_PixelToPalette[pixel]:pixel)) ) & 0x00ffffff;
color.pixel = pixel;
XQueryColor(display, cSpace.colorMap, &color);
return RGB(color.red >> 8, color.green >> 8, color.blue >> 8);
}
/***********************************************************************
* COLOR_ToPhysical
*
* Return the physical color closest to 'color'.
*/
int COLOR_ToPhysical( DC *dc, COLORREF color )
{
WORD index = 0;
unsigned char spec_type;
HPALETTE16 hPal = (dc)? dc->w.hPalette: STOCK_DEFAULT_PALETTE;
spec_type = color >> 24;
if( spec_type == 0xff )
{
spec_type = 0; /* 'write' seems to need that for 'Page 1' text */
color &= 0xffffff;
}
if( spec_type > 2 )
{
fprintf(stderr, "COLOR_ToPhysical : invalid RGB specifier for: %08lx\n", color);
spec_type = 0;
}
if (dc && (dc->w.bitsPerPixel == 1) && (spec_type == 0))
{
/* monochrome */
if (((color >> 16) & 0xff) +
((color >> 8) & 0xff) + (color & 0xff) > 255*3/2)
return 1; /* white */
else return 0; /* black */
}
if ( cSpace.flags & COLOR_FIXED )
{
/* there is no colormap limitation; we are going to have to compute
* the pixel value from the visual information stored earlier
*/
unsigned long red, green, blue;
unsigned idx = 0;
PALETTEOBJ * palPtr = (PALETTEOBJ *) GDI_GetObjPtr( hPal, PALETTE_MAGIC );
switch(spec_type)
{
case 2: /* PALETTERGB - not sure if we really need to search palette */
idx = COLOR_PaletteLookupPixel( palPtr->logpalette.palPalEntry,
palPtr->logpalette.palNumEntries,
NULL, color, FALSE);
if( palPtr->mapping ) return palPtr->mapping[idx];
color = *(COLORREF*)(palPtr->logpalette.palPalEntry + idx);
break;
case 1: /* PALETTEINDEX */
if ( (idx = color & 0xffff) >= palPtr->logpalette.palNumEntries)
{
fprintf(stderr, "\tRGB(%lx) : idx %d is out of bounds, assuming black\n", color, idx);
return 0;
}
if( palPtr->mapping ) return palPtr->mapping[idx];
color = *(COLORREF*)(palPtr->logpalette.palPalEntry + idx);
/* fall through and out */
case 0: /* RGB */
default:
}
red = GetRValue(color); green = GetGValue(color); blue = GetBValue(color);
if (COLOR_Graymax)
{
/* grayscale only; return scaled value */
return ( (red * 30 + green * 69 + blue * 11) * COLOR_Graymax) / 25500;
}
else
{
/* scale each individually and construct the TrueColor pixel value */
if (COLOR_Redmax != 255) red = (red * COLOR_Redmax) / 255;
if (COLOR_Greenmax != 255) green = (green * COLOR_Greenmax) / 255;
if (COLOR_Bluemax != 255) blue = (blue * COLOR_Bluemax) / 255;
return (red << COLOR_Redshift) | (green << COLOR_Greenshift) | (blue << COLOR_Blueshift);
}
}
else
{
PALETTEOBJ* palPtr = (PALETTEOBJ *) GDI_GetObjPtr( hPal, PALETTE_MAGIC);
/* palPtr can be NULL when DC is being destroyed */
if( !palPtr ) return 0;
else if( !palPtr->mapping )
dprintf_palette(stddeb,"\tpalette %04x is not realized\n", dc->w.hPalette);
switch(spec_type) /* we have to peruse DC and system palette */
{
default:
case 0: /* RGB */
index = COLOR_PaletteLookupPixel( COLOR_sysPal, 256,
COLOR_PaletteToPixel, color, FALSE);
/* dprintf_palette(stddeb,"\tRGB(%lx) -> pixel %i\n", color, index);
*/
break;
case 1: /* PALETTEINDEX */
index = color & 0xffff;
if( index >= palPtr->logpalette.palNumEntries )
fprintf(stderr, "\tRGB(%lx) : index %i is out of bounds\n", color, index);
else if( palPtr->mapping ) index = palPtr->mapping[index];
/* dprintf_palette(stddeb,"\tPALETTEINDEX(%04x) -> pixel %i\n", (WORD)color, index);
*/
break;
case 2: /* PALETTERGB */
index = COLOR_PaletteLookupPixel( palPtr->logpalette.palPalEntry,
palPtr->logpalette.palNumEntries,
palPtr->mapping, color, FALSE);
/* dprintf_palette(stddeb,"\tPALETTERGB(%lx) -> pixel %i\n", color, index);
*/
break;
}
}
return index;
}
/***********************************************************************
* COLOR_SetMapping
*
* Set the color-mapping table for selected palette.
* Return number of entries which mapping has changed.
*/
int COLOR_SetMapping( PALETTEOBJ* palPtr, BOOL32 mapOnly )
{
int i, index;
char flag;
int prevMapping = (palPtr->mapping) ? 1 : 0;
int iRemapped = 0;
/* reset dynamic system palette entries */
if( !mapOnly && COLOR_firstFree != -1)
COLOR_FormatSystemPalette();
/* initialize palette mapping table */
palPtr->mapping = (int*)xrealloc(palPtr->mapping, sizeof(int)*
palPtr->logpalette.palNumEntries);
for( i = 0; i < palPtr->logpalette.palNumEntries; i++ )
{
index = -1;
flag = PC_SYS_USED;
switch( palPtr->logpalette.palPalEntry[i].peFlags & 0x07 )
{
case PC_EXPLICIT: /* palette entries are indices into system palette */
index = *(WORD*)(palPtr->logpalette.palPalEntry + i);
if( index > 255 || (index >= COLOR_gapStart && index <= COLOR_gapEnd) )
{
fprintf(stderr,"PC_EXPLICIT: idx %d out of system palette, assuming black.\n", index);
index = 0;
}
break;
case PC_RESERVED: /* forbid future mappings to this entry */
flag |= PC_SYS_RESERVED;
/* fall through */
default: /* try to collapse identical colors */
index = COLOR_PaletteLookupExactIndex(COLOR_sysPal, 256,
*(COLORREF*)(palPtr->logpalette.palPalEntry + i));
/* fall through */
case PC_NOCOLLAPSE:
if( index < 0 )
{
if( COLOR_firstFree > 0 && !(cSpace.flags & COLOR_FIXED) )
{
XColor color;
index = COLOR_firstFree; /* ought to be available */
COLOR_firstFree = COLOR_freeList[index];
color.pixel = (COLOR_PaletteToPixel) ? COLOR_PaletteToPixel[index] : index;
color.red = palPtr->logpalette.palPalEntry[i].peRed << 8;
color.green = palPtr->logpalette.palPalEntry[i].peGreen << 8;
color.blue = palPtr->logpalette.palPalEntry[i].peBlue << 8;
color.flags = DoRed | DoGreen | DoBlue;
XStoreColor(display, cSpace.colorMap, &color);
COLOR_sysPal[index] = palPtr->logpalette.palPalEntry[i];
COLOR_sysPal[index].peFlags = flag;
COLOR_freeList[index] = 0;
if( COLOR_PaletteToPixel ) index = COLOR_PaletteToPixel[index];
break;
}
else if ( cSpace.flags & COLOR_VIRTUAL )
{
index = COLOR_ToPhysical( NULL, 0x00ffffff &
*(COLORREF*)(palPtr->logpalette.palPalEntry + i));
break;
}
/* we have to map to existing entry in the system palette */
index = COLOR_PaletteLookupPixel(COLOR_sysPal, 256, NULL,
*(COLORREF*)(palPtr->logpalette.palPalEntry + i), TRUE);
}
palPtr->logpalette.palPalEntry[i].peFlags |= PC_SYS_USED;
if( COLOR_PaletteToPixel ) index = COLOR_PaletteToPixel[index];
break;
}
if( !prevMapping || palPtr->mapping[i] != index ) iRemapped++;
palPtr->mapping[i] = index;
dprintf_palette(stddeb,"\tentry %i (%lx) -> pixel %i\n", i,
*(COLORREF*)(palPtr->logpalette.palPalEntry + i), index);
}
return iRemapped;
}
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