mirror of
https://github.com/NGSolve/netgen.git
synced 2024-12-26 13:50:33 +05:00
220 lines
7.0 KiB
C
220 lines
7.0 KiB
C
/* $XConsortium: StdCmap.c,v 1.14 94/04/17 20:16:14 rws Exp $ */
|
|
|
|
/*
|
|
|
|
Copyright (c) 1989 X Consortium
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
of this software and associated documentation files (the "Software"), to deal
|
|
in the Software without restriction, including without limitation the rights
|
|
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
copies of the Software, and to permit persons to whom the Software is
|
|
furnished to do so, subject to the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be included in
|
|
all copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
|
|
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
|
|
Except as contained in this notice, the name of the X Consortium shall not be
|
|
used in advertising or otherwise to promote the sale, use or other dealings
|
|
in this Software without prior written authorization from the X Consortium.
|
|
|
|
*/
|
|
|
|
/*
|
|
* Author: Donna Converse, MIT X Consortium
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <X11/Xlib.h>
|
|
#include <X11/Xatom.h>
|
|
#include <X11/Xutil.h>
|
|
#include <X11/Xmu/StdCmap.h>
|
|
|
|
#define lowbit(x) ((x) & (~(x) + 1))
|
|
|
|
static Status valid_args(); /* argument restrictions */
|
|
|
|
/*
|
|
* To create any one standard colormap, use XmuStandardColormap().
|
|
*
|
|
* Create a standard colormap for the given screen, visualid, and visual
|
|
* depth, with the given red, green, and blue maximum values, with the
|
|
* given standard property name. Return a pointer to an XStandardColormap
|
|
* structure which describes the newly created colormap, upon success.
|
|
* Upon failure, return NULL.
|
|
*
|
|
* XmuStandardColormap() calls XmuCreateColormap() to create the map.
|
|
*
|
|
* Resources created by this function are not made permanent; that is the
|
|
* caller's responsibility.
|
|
*/
|
|
|
|
XStandardColormap *XmuStandardColormap(dpy, screen, visualid, depth, property,
|
|
cmap, red_max, green_max, blue_max)
|
|
Display *dpy; /* specifies X server connection */
|
|
int screen; /* specifies display screen */
|
|
VisualID visualid; /* identifies the visual type */
|
|
unsigned int depth; /* identifies the visual type */
|
|
Atom property; /* a standard colormap property */
|
|
Colormap cmap; /* specifies colormap ID or None */
|
|
unsigned long red_max, green_max, blue_max; /* allocations */
|
|
{
|
|
XStandardColormap *stdcmap;
|
|
Status status;
|
|
XVisualInfo vinfo_template, *vinfo;
|
|
long vinfo_mask;
|
|
int n;
|
|
|
|
/* Match the required visual information to an actual visual */
|
|
vinfo_template.visualid = visualid;
|
|
vinfo_template.screen = screen;
|
|
vinfo_template.depth = depth;
|
|
vinfo_mask = VisualIDMask | VisualScreenMask | VisualDepthMask;
|
|
if ((vinfo = XGetVisualInfo(dpy, vinfo_mask, &vinfo_template, &n)) == NULL)
|
|
return 0;
|
|
|
|
/* Check the validity of the combination of visual characteristics,
|
|
* allocation, and colormap property. Create an XStandardColormap
|
|
* structure.
|
|
*/
|
|
|
|
if (! valid_args(vinfo, red_max, green_max, blue_max, property)
|
|
|| ((stdcmap = XAllocStandardColormap()) == NULL)) {
|
|
XFree((char *) vinfo);
|
|
return 0;
|
|
}
|
|
|
|
/* Fill in the XStandardColormap structure */
|
|
|
|
if (cmap == DefaultColormap(dpy, screen)) {
|
|
/* Allocating out of the default map, cannot use XFreeColormap() */
|
|
Window win = XCreateWindow(dpy, RootWindow(dpy, screen), 1, 1, 1, 1,
|
|
0, 0, InputOnly, vinfo->visual,
|
|
(unsigned long) 0,
|
|
(XSetWindowAttributes *)NULL);
|
|
stdcmap->killid = (XID) XCreatePixmap(dpy, win, 1, 1, depth);
|
|
XDestroyWindow(dpy, win);
|
|
stdcmap->colormap = cmap;
|
|
} else {
|
|
stdcmap->killid = ReleaseByFreeingColormap;
|
|
stdcmap->colormap = XCreateColormap(dpy, RootWindow(dpy, screen),
|
|
vinfo->visual, AllocNone);
|
|
}
|
|
stdcmap->red_max = red_max;
|
|
stdcmap->green_max = green_max;
|
|
stdcmap->blue_max = blue_max;
|
|
if (property == XA_RGB_GRAY_MAP)
|
|
stdcmap->red_mult = stdcmap->green_mult = stdcmap->blue_mult = 1;
|
|
else if (vinfo->class == TrueColor || vinfo->class == DirectColor) {
|
|
stdcmap->red_mult = lowbit(vinfo->red_mask);
|
|
stdcmap->green_mult = lowbit(vinfo->green_mask);
|
|
stdcmap->blue_mult = lowbit(vinfo->blue_mask);
|
|
} else {
|
|
stdcmap->red_mult = (red_max > 0)
|
|
? (green_max + 1) * (blue_max + 1) : 0;
|
|
stdcmap->green_mult = (green_max > 0) ? blue_max + 1 : 0;
|
|
stdcmap->blue_mult = (blue_max > 0) ? 1 : 0;
|
|
}
|
|
stdcmap->base_pixel = 0; /* base pixel may change */
|
|
stdcmap->visualid = vinfo->visualid;
|
|
|
|
/* Make the colormap */
|
|
|
|
status = XmuCreateColormap(dpy, stdcmap);
|
|
|
|
/* Clean up */
|
|
|
|
XFree((char *) vinfo);
|
|
if (!status) {
|
|
|
|
/* Free the colormap or the pixmap, if we created one */
|
|
if (stdcmap->killid == ReleaseByFreeingColormap)
|
|
XFreeColormap(dpy, stdcmap->colormap);
|
|
else if (stdcmap->killid != None)
|
|
XFreePixmap(dpy, stdcmap->killid);
|
|
|
|
XFree((char *) stdcmap);
|
|
return (XStandardColormap *) NULL;
|
|
}
|
|
return stdcmap;
|
|
}
|
|
|
|
/****************************************************************************/
|
|
static Status valid_args(vinfo, red_max, green_max, blue_max, property)
|
|
XVisualInfo *vinfo; /* specifies visual */
|
|
unsigned long red_max, green_max, blue_max; /* specifies alloc */
|
|
Atom property; /* specifies property name */
|
|
{
|
|
unsigned long ncolors; /* number of colors requested */
|
|
|
|
/* Determine that the number of colors requested is <= map size */
|
|
|
|
if ((vinfo->class == DirectColor) || (vinfo->class == TrueColor)) {
|
|
unsigned long mask;
|
|
|
|
mask = vinfo->red_mask;
|
|
while (!(mask & 1))
|
|
mask >>= 1;
|
|
if (red_max > mask)
|
|
return 0;
|
|
mask = vinfo->green_mask;
|
|
while (!(mask & 1))
|
|
mask >>= 1;
|
|
if (green_max > mask)
|
|
return 0;
|
|
mask = vinfo->blue_mask;
|
|
while (!(mask & 1))
|
|
mask >>= 1;
|
|
if (blue_max > mask)
|
|
return 0;
|
|
} else if (property == XA_RGB_GRAY_MAP) {
|
|
ncolors = red_max + green_max + blue_max + 1;
|
|
if (ncolors > vinfo->colormap_size)
|
|
return 0;
|
|
} else {
|
|
ncolors = (red_max + 1) * (green_max + 1) * (blue_max + 1);
|
|
if (ncolors > vinfo->colormap_size)
|
|
return 0;
|
|
}
|
|
|
|
/* Determine that the allocation and visual make sense for the property */
|
|
|
|
switch (property)
|
|
{
|
|
case XA_RGB_DEFAULT_MAP:
|
|
if (red_max == 0 || green_max == 0 || blue_max == 0)
|
|
return 0;
|
|
break;
|
|
case XA_RGB_RED_MAP:
|
|
if (red_max == 0)
|
|
return 0;
|
|
break;
|
|
case XA_RGB_GREEN_MAP:
|
|
if (green_max == 0)
|
|
return 0;
|
|
break;
|
|
case XA_RGB_BLUE_MAP:
|
|
if (blue_max == 0)
|
|
return 0;
|
|
break;
|
|
case XA_RGB_BEST_MAP:
|
|
if (red_max == 0 || green_max == 0 || blue_max == 0)
|
|
return 0;
|
|
break;
|
|
case XA_RGB_GRAY_MAP:
|
|
if (red_max == 0 || blue_max == 0 || green_max == 0)
|
|
return 0;
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|