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/*
* General Device dependent code for xli.
*
* Author; Graeme W. Gill
*/
#include "xli.h"
#include <ctype.h>
static int saParseXColor(DisplayInfo *dinfo, char *spec, XColor *xcolor);
/* Initialise a display info structure to default values */
void xliDefaultDispinfo(DisplayInfo *dinfo)
{
dinfo->width = 0;
dinfo->height = 0;
dinfo->disp = NULL;
dinfo->scrn = 0;
dinfo->colormap = 0;
}
/* open up a display and screen, and stick the info away */
/* Return FALSE on failure */
boolean xliOpenDisplay(DisplayInfo *dinfo, char *name)
{
Display *disp;
int scrn;
if (!(disp = XOpenDisplay(globals.dname)))
return FALSE; /* failed */
scrn = DefaultScreen(disp);
dinfo->disp = disp;
dinfo->scrn = scrn;
dinfo->colormap = DefaultColormap(disp, scrn);
dinfo->width = DisplayWidth(disp, scrn);
dinfo->height = DisplayHeight(disp, scrn);
XSetErrorHandler(errorHandler);
return TRUE;
}
/* report display name when connection fails */
char *xliDisplayName(char *name)
{
return XDisplayName(name);
}
void xliCloseDisplay(DisplayInfo *dinfo)
{
XCloseDisplay(dinfo->disp);
}
/*
simple X11 error handler. this provides us with some kind of error recovery.
*/
int errorHandler(Display * disp, XErrorEvent * error)
{
char errortext[BUFSIZ];
XGetErrorText(disp, error->error_code, errortext, BUFSIZ);
fprintf(stderr, "xli: X Error: %s on 0x%lx\n",
errortext, error->resourceid);
if (globals._Xdebug)
abort();
else
return (0);
}
/* Return the default visual class */
int xliDefaultVisual(void)
{
return (DefaultVisual(globals.dinfo.disp, globals.dinfo.scrn)->class);
}
/* return the default depth of the default visual */
int xliDefaultDepth(void)
{
return DefaultDepth(globals.dinfo.disp, globals.dinfo.scrn);
}
/* Print some information about the display */
void tellAboutDisplay(DisplayInfo * dinfo)
{
Screen *screen;
int a, b;
if (dinfo->disp) {
screen = ScreenOfDisplay(dinfo->disp, dinfo->scrn);
printf("Server: %s Version %d\n", ServerVendor(dinfo->disp), VendorRelease(dinfo->disp));
printf("Depths and visuals supported:\n");
for (a = 0; a < screen->ndepths; a++) {
printf("%2d:", screen->depths[a].depth);
for (b = 0; b < screen->depths[a].nvisuals; b++)
printf(" %s", nameOfVisualClass(screen->depths[a].visuals[b].class));
printf("\n");
}
} else {
printf("[No information on server; error occurred before connection]\n");
}
}
/* A standalone color name to RGB lookup routine */
typedef struct {
char *name;
unsigned char red;
unsigned char green;
unsigned char blue;
} xliXColorTableEntry;
#include "rgbtab.h" /* Equivalent of an X color table */
/* parse an X like color. */
int xliParseXColor(DisplayInfo *dinfo, char *spec, XColor *xcolor)
{
int stat;
if (dinfo->disp) {
stat = XParseColor(globals.dinfo.disp, globals.dinfo.colormap,
spec, xcolor);
} else {
stat = saParseXColor(dinfo, spec, xcolor);
}
return stat;
}
static int saParseXColor(DisplayInfo *dinfo, char *spec, XColor *xcolor)
{
int i, n, r, g, b;
xliXColorTableEntry *tp;
xcolor->red = 0;
xcolor->green = 0;
xcolor->blue = 0;
n = strlen(spec);
if (n > 0) {
for (i = 0; i < n; i++) {
if (isupper(spec[i]))
spec[i] = tolower(spec[i]);
}
if (spec[0] == '#') {
switch (n - 1) {
case 3:
r = hstoi(spec + 1, 1);
g = hstoi(spec + 2, 1);
b = hstoi(spec + 3, 1);
if (r >= 0 && g >= 0 && b >= 0) {
xcolor->red = r * 0x1111;
xcolor->green = g * 0x1111;
xcolor->blue = b * 0x1111;
return 1;
}
break;
case 6:
r = hstoi(spec + 1, 2);
g = hstoi(spec + 3, 2);
b = hstoi(spec + 5, 2);
if (r >= 0 && g >= 0 && b >= 0) {
xcolor->red = r * 0x101;
xcolor->green = g * 0x101;
xcolor->blue = b * 0x101;
return 1;
}
break;
case 9:
r = hstoi(spec + 1, 3);
g = hstoi(spec + 4, 3);
b = hstoi(spec + 7, 3);
if (r >= 0 && g >= 0 && b >= 0) {
xcolor->red = (r * 65535) / 4095;
xcolor->green = (g * 65535) / 4095;
xcolor->blue = (b * 65535) / 4095;
return 1;
}
break;
case 12:
r = hstoi(spec + 1, 4);
g = hstoi(spec + 5, 4);
b = hstoi(spec + 9, 4);
if (r >= 0 && g >= 0 && b >= 0) {
xcolor->red = r;
xcolor->green = g;
xcolor->blue = b;
return 1;
}
break;
}
} else {
/*
else its a color name. Do a linear search for it
(binary search would be better)
*/
for (n = 0, tp = &xliXColorTable[0]; tp->name[0]; tp++) {
if (strcmp(spec, tp->name) == 0) {
xcolor->red = tp->red * 0x101;
xcolor->green = tp->green * 0x101;
xcolor->blue = tp->blue * 0x101;
return 1;
}
}
}
}
/* default - return black */
xcolor->red = 0;
xcolor->green = 0;
xcolor->blue = 0;
return 0;
}
/* gamma correct an XColor */
void xliGammaCorrectXColor(XColor * xlicolor, double gamma)
{
xlicolor->red = (int) (0.5 + 65535.0 * pow((double) xlicolor->red / 65535.0, gamma));
xlicolor->green = (int) (0.5 + 65535.0 * pow((double) xlicolor->green / 65535.0, gamma));
xlicolor->blue = (int) (0.5 + 65535.0 * pow((double) xlicolor->blue / 65535.0, gamma));
}
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