148 lines
3.3 KiB
C
148 lines
3.3 KiB
C
/*
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* Color functions
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*
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* Copyright 1993 Alexandre Julliard
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*/
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static char Copyright[] = "Copyright Alexandre Julliard, 1993";
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#include <stdlib.h>
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#include <X11/Xlib.h>
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#include "windows.h"
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#include "options.h"
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extern Display * display;
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extern Screen * screen;
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Colormap COLOR_WinColormap = 0;
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/* System colors */
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static const char * SysColors[] =
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{
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/* Low pixel values (0..7) */
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"black", "red4", "green4", "yellow4",
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"blue4", "magenta4", "cyan4", "gray50",
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/* High pixel values (max-7..max) */
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"gray75", "red", "green", "yellow",
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"blue", "magenta", "cyan", "white"
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};
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#define NB_SYS_COLORS (sizeof(SysColors) / sizeof(SysColors[0]))
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/***********************************************************************
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* COLOR_FillDefaultMap
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*
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* Try to allocate colors from default screen map (used when we
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* don't want to or can't use a private map).
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*/
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static int COLOR_FillDefaultMap()
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{
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XColor color;
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int i, total = 0;
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for (i = 0; i < NB_SYS_COLORS; i++)
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{
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if (XParseColor( display, DefaultColormapOfScreen( screen ),
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SysColors[i], &color ))
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{
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if (XAllocColor( display, DefaultColormapOfScreen( screen ),
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&color ))
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total++;
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}
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}
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return total;
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}
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/***********************************************************************
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* COLOR_BuildMap
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*
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* Fill the private colormap.
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*/
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static BOOL COLOR_BuildMap( Colormap map, int depth, int size )
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{
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XColor color;
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int i;
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/* Fill the whole map with a range of colors */
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if ((1 << depth) > NB_SYS_COLORS)
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{
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int red_incr, green_incr, blue_incr;
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int r, g, b;
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blue_incr = 0x10000 >> (depth / 3);
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red_incr = 0x10000 >> ((depth + 1) / 3);
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green_incr = 0x10000 >> ((depth + 2) / 3);
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for (i = 0, r = red_incr - 1; r < 0x10000; r += red_incr)
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for (g = green_incr - 1; g < 0x10000; g += green_incr)
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for (b = blue_incr - 1; b < 0x10000; b += blue_incr)
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{
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if (i >= size) break;
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color.pixel = i++;
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color.red = r;
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color.green = g;
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color.blue = b;
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XStoreColor( display, map, &color );
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}
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}
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/* Store the system palette colors */
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for (i = 0; i < NB_SYS_COLORS; i++)
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{
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if (!XParseColor( display, map, SysColors[i], &color ))
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color.red = color.green = color.blue = color.flags = 0;
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if (i < NB_SYS_COLORS/2) color.pixel = i;
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else color.pixel = (1 << depth) - NB_SYS_COLORS + i;
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if (color.pixel < size) XStoreColor( display, map, &color );
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}
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return TRUE;
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}
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/***********************************************************************
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* COLOR_Init
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*/
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BOOL COLOR_Init()
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{
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Visual * visual = DefaultVisual( display, DefaultScreen(display) );
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switch(visual->class)
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{
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case GrayScale:
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case PseudoColor:
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case DirectColor:
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if (Options.usePrivateMap)
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{
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COLOR_WinColormap = XCreateColormap( display,
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DefaultRootWindow(display),
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visual, AllocAll );
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if (COLOR_WinColormap)
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{
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COLOR_BuildMap(COLOR_WinColormap,
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DefaultDepth(display, DefaultScreen(display)),
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visual->map_entries );
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break;
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}
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}
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/* Fall through */
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case StaticGray:
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case StaticColor:
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case TrueColor:
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COLOR_FillDefaultMap();
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COLOR_WinColormap = DefaultColormapOfScreen( screen );
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break;
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}
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return TRUE;
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}
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