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/* colors.c -- Colour handling
$Id$
Copyright (C) 1999 John Harper <john@dcs.warwick.ac.uk>
This file is part of sawfish.
sawfish is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
sawfish is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with sawfish; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "sawfish.h"
static Lisp_Color *color_list;
int color_type;
DEFSYM(default_foreground, "default-foreground");
DEFUN("get-color-rgb", Fget_color_rgb, Sget_color_rgb,
(repv red, repv green, repv blue, repv alpha), rep_Subr4) /*
::doc:sawfish.wm.colors#get-color-rgb::
get-color-rgb RED GREEN BLUE [ALPHA]
::end:: */
{
Lisp_Color *f;
rep_DECLARE1(red, rep_INTP);
rep_DECLARE2(green, rep_INTP);
rep_DECLARE3(blue, rep_INTP);
if (!rep_INTP (alpha))
alpha = rep_MAKE_INT (65535);
if (dpy == 0)
return Qnil;
f = color_list;
while (f != 0)
{
if (f->red == rep_INT(red)
&& f->green == rep_INT(green)
&& f->blue == rep_INT(blue)
&& f->alpha == rep_INT(alpha))
{
break;
}
f = f->next;
}
if (f == 0)
{
int pixel = best_color_match (rep_INT(red) / 256,
rep_INT(green) / 256,
rep_INT(blue) / 256);
f = rep_ALLOC_CELL(sizeof(Lisp_Color));
rep_data_after_gc += sizeof (Lisp_Color);
f->car = color_type;
f->next = color_list;
color_list = f;
f->red = rep_INT(red);
f->green = rep_INT(green);
f->blue = rep_INT(blue);
f->alpha = rep_INT(alpha);
f->pixel = pixel;
}
return rep_VAL(f);
}
DEFUN("get-color", Fget_color, Sget_color, (repv name, repv alpha), rep_Subr2) /*
::doc:sawfish.wm.colors#get-color::
get-color NAME [ALPHA]
Return the color object representing the color named NAME, a standard
X11 color specifier.
::end:: */
{
XColor exact_col;
rep_DECLARE1(name, rep_STRINGP);
if (dpy == 0)
return Qnil;
if (XParseColor (dpy, image_cmap, rep_STR(name), &exact_col) != 0)
{
return Fget_color_rgb (rep_MAKE_INT(exact_col.red),
rep_MAKE_INT(exact_col.green),
rep_MAKE_INT(exact_col.blue),
alpha);
}
else
{
return Fsignal (Qerror,
rep_list_2 (rep_string_dup("no such color"),
name));
}
}
DEFUN("color-name", Fcolor_name, Scolor_name, (repv color), rep_Subr1) /*
::doc:sawfish.wm.colors#color-name::
color-name COLOR
Return the name of the color represented by the color object COLOR.
::end:: */
{
char buf[32];
rep_DECLARE1(color, COLORP);
sprintf (buf, "#%04x%04x%04x",
VCOLOR(color)->red, VCOLOR(color)->green, VCOLOR(color)->blue);
return rep_string_dup (buf);
}
DEFUN("color-rgb", Fcolor_rgb, Scolor_rgb, (repv color), rep_Subr1) /*
::doc:sawfish.wm.colors#color-rgb::
color-rgb COLOR
Returns a list of integers (RED GREEN BLUE ALPHA) representing the
actual color values of the color represented by object COLOR. The
individual values range from zero to 65535.
::end:: */
{
rep_DECLARE1(color, COLORP);
return rep_list_4 (rep_MAKE_INT(VCOLOR(color)->red),
rep_MAKE_INT(VCOLOR(color)->green),
rep_MAKE_INT(VCOLOR(color)->blue),
rep_MAKE_INT(VCOLOR(color)->alpha));
}
DEFUN("color-rgb-8", Fcolor_rgb_8, Scolor_rgb_8, (repv color), rep_Subr1) /*
::doc:sawfish.wm.colors#color-rgb::
color-rgb-8 COLOR
Returns a list of integers (RED GREEN BLUE ALPHA) representing the
actual color values of the color represented by object COLOR. The
individual values range from zero to 255.
::end:: */
{
rep_DECLARE1(color, COLORP);
return rep_list_4 (rep_MAKE_INT(VCOLOR(color)->red / 256),
rep_MAKE_INT(VCOLOR(color)->green / 256),
rep_MAKE_INT(VCOLOR(color)->blue / 256),
rep_MAKE_INT(VCOLOR(color)->alpha / 256));
}
DEFUN("colorp", Fcolorp, Scolorp, (repv win), rep_Subr1) /*
::doc:sawfish.wm.colors#colorp::
colorp ARG
Returns t if ARG is a color object.
::end:: */
{
return COLORP(win) ? Qt : Qnil;
}
/* type hooks */
static int
color_cmp (repv w1, repv w2)
{
return w1 != w2;
}
static void
color_prin (repv stream, repv obj)
{
char buf[256];
sprintf (buf, "#<color #%04x%04x%04x>",
VCOLOR(obj)->red, VCOLOR(obj)->green, VCOLOR(obj)->blue);
rep_stream_puts (stream, buf, -1, FALSE);
}
static void
color_sweep (void)
{
Lisp_Color *w = color_list;
color_list = 0;
while (w != 0)
{
Lisp_Color *next = w->next;
if (!rep_GC_CELL_MARKEDP(rep_VAL(w)))
rep_FREE_CELL(w);
else
{
rep_GC_CLR_CELL(rep_VAL(w));
w->next = color_list;
color_list = w;
}
w = next;
}
}
/* initialisation */
void
colors_init (void)
{
repv tem = rep_push_structure ("sawfish.wm.colors");
color_type = rep_register_new_type ("color", color_cmp, color_prin,
color_prin, color_sweep, 0,
0, 0, 0, 0, 0, 0, 0);
rep_ADD_SUBR(Sget_color_rgb);
rep_ADD_SUBR(Sget_color);
rep_ADD_SUBR(Scolor_name);
rep_ADD_SUBR(Scolor_rgb);
rep_ADD_SUBR(Scolor_rgb_8);
rep_ADD_SUBR(Scolorp);
rep_INTERN_SPECIAL(default_foreground);
if (!batch_mode_p ())
{
DEFSTRING (name, "#000000");
repv black = Fget_color (rep_VAL (&name), Qnil);
if (black == rep_NULL)
black = Qnil;
Fset (Qdefault_foreground, black);
}
rep_pop_structure (tem);
}
void
colors_kill (void)
{
}
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