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#ifndef lint
static char SccsId[] = "%W% %G%";
#endif
/* Module: clrhard.c (Color Hard)
* Purpose: Get common named colors
* Subroutine: init_hard_colors() returns: void
* lookup_cursor_colors() returns: void
* alloc_cursor_cell_color() returns: int
* free_cursor_cell_color() returns: void
* Xlib calls: XAllocNamedColor(), XAllocColor()
* Xlib calls: XFreeColors(), XLookupColor()
* Copyright: 1989 Smithsonian Astrophysical Observatory
* You may do anything you like with this file except remove
* this copyright. The Smithsonian Astrophysical Observatory
* makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without
* express or implied warranty.
* Modified: {0} Michael VanHilst initial version 9 May 1989
* {n} <who> -- <does what> -- <when>
*/
#include <stdio.h> /* stderr, FILE, NULL, etc. */
#include <X11/Xlib.h> /* X window stuff */
#include <X11/Xutil.h> /* X window manager stuff */
#include "hfiles/color.h" /* color structs */
/*
* Subroutine: init_hard_colors
* Purpose: Set up basic hardware colors
*/
void init_hard_colors ( color, colormap )
struct colorRec *color;
Colormap colormap;
{
static int get_hard_color();
color->hard.red =
get_hard_color(color->display, colormap, "red", 63000, 0, 0);
color->gcset.red.foreground = color->hard.red;
color->hard.green =
get_hard_color(color->display, colormap, "green", 0, 60000, 0);
color->gcset.green.foreground = color->hard.green;
color->hard.blue =
get_hard_color(color->display, colormap, "blue", 0, 0, 65535);
color->gcset.blue.foreground = color->hard.blue;
color->hard.yellow =
get_hard_color(color->display, colormap, "yellow", 65535, 65535, 0);
color->hard.true_black =
get_hard_color(color->display, colormap, "black", 0, 0, 0);
color->gcset.black.foreground = color->hard.true_black;
color->hard.true_white =
get_hard_color(color->display, colormap, "white", 65535, 65535, 65535);
color->gcset.white.foreground = color->hard.std_white;
}
/*
* Subroutine: lookup_cursor_colors
* Purpose: Get color parameters from named cursor colors
*/
void lookup_cursor_colors ( color, colormap, init )
struct colorRec *color;
Colormap colormap;
int init;
{
static void lookup_color();
/* update xcolor structs if needed */
if( init || (color->cur.desired_cur != NULL) ) {
lookup_color(color->display, colormap, &(color->cur.color_cur),
color->cur.desired_cur, color->cur.default_cur);
color->cur.desired_cur = NULL;
}
if( init || (color->cur.desired_one != NULL) ) {
lookup_color(color->display, colormap, &(color->cur.color_one),
color->cur.desired_one, color->cur.default_one);
color->cur.desired_one = NULL;
}
if( init || (color->cur.desired_two != NULL) ) {
lookup_color(color->display, colormap, &(color->cur.color_two),
color->cur.desired_two, color->cur.default_two);
color->cur.desired_two = NULL;
}
}
/*
* Subroutine: alloc_cursor_cell_color
* Purpose: Allocate defined colors for cursors and overlays
* Returns: Pixel value for the cursor color
* Pre-state: XColor for cur, one, and two, initialized
* Post-state: Pixel values for one and two set, that for cur returned.
*/
int alloc_cursor_cell_color ( color, colormap )
struct colorRec *color;
Colormap colormap;
{
int val;
static int alloc_hard_color();
if( (color->cur.disp_one =
alloc_hard_color(color->display, colormap, &color->cur.color_one)) < 0 )
color->cur.disp_one = color->hard.blue;
if( (color->cur.disp_two =
alloc_hard_color(color->display, colormap, &color->cur.color_two)) < 0 )
color->cur.disp_two = color->hard.red;
if( (val =
alloc_hard_color(color->display, colormap, &color->cur.color_cur)) < 0 )
val = color->hard.green;
return( val );
}
/*
* Subroutine: free_cursor_cell_color
* Purpose: Free cell color overlay colors
*/
void free_cursor_cell_color ( color )
struct colorRec *color;
{
static void free_readonly_color();
free_readonly_color(color, (int)color->cur.color_one.pixel);
free_readonly_color(color, (int)color->cur.color_two.pixel);
free_readonly_color(color, (int)color->cur.color_cur.pixel);
}
/*
* Subroutine: free_readonly_color
* Purpose: Free cursor color if it is not one of the essential ones
* Xlib calls: XFreeColors()
*/
static void free_readonly_color ( color, pixel_value )
struct colorRec *color;
int pixel_value;
{
if( (pixel_value != color->hard.red) &&
(pixel_value != color->hard.green) &&
(pixel_value != color->hard.blue) &&
(pixel_value != color->hard.true_black) &&
(pixel_value != color->hard.true_white) &&
(pixel_value != color->hard.std_black) &&
(pixel_value != color->hard.std_white) )
XFreeColors(color->display, color->colormap,
(unsigned long *)&pixel_value, 1, 0);
}
/*
* Subroutine: get_hard_color
* Purpose: Alloc a read-only color cell with a common color
* Xlib calls: XAllocNamedColor(), XAllocColor()
* Method: Get a color by name if possible, else reserve it by value
*/
static int get_hard_color ( display, colormap, name, red, green, blue )
Display *display;
Colormap colormap;
char *name;
int red, green, blue;
{
XColor actual, ideal;
/* see if we can get a standard named color */
if( XAllocNamedColor(display, colormap, name, &actual, &ideal) == 0 ) {
/* else reserve our own */
actual.pixel = 0;
actual.red = red;
actual.green = green;
actual.blue = blue;
if( XAllocColor(display, colormap, &actual) == 0 ) {
(void)fprintf(stderr, "WARNING: could not get harware color.\n");
return( 0 );
}
}
return( (int)actual.pixel );
}
/*
* Subroutine: lookup_color
* Purpose: Set up the rgb values in the Xcolor
* Xlib calls: XLookupColor
* Method: Use the desired color if given and known to Xlib, else use
* the defaut color.
*/
static void lookup_color ( display, colormap, xcolor,
desired_name, default_name )
Display *display;
Colormap colormap;
XColor *xcolor;
char *desired_name;
char *default_name;
{
XColor ideal;
if( desired_name != NULL ) {
if( XLookupColor(display, colormap, desired_name, &ideal, xcolor) ) {
return;
} else {
(void)fprintf(stderr,"WARNING: Could not find color: %s, using: %s\n",
desired_name, default_name);
}
}
XLookupColor(display, colormap, default_name, &ideal, xcolor);
}
/*
* Subroutine: alloc_hard_color
* Purpose: Given rgb values, set the pixel
* Xlib calls: XAllocColor()
* Returns: Pixel value used or -1 if failed
*/
static int alloc_hard_color ( display, colormap, xcolor )
Display *display;
Colormap colormap;
XColor *xcolor;
{
if( XAllocColor(display, colormap, xcolor) )
return( (int)xcolor->pixel );
else
return( -1 );
}
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