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/*
* Client application for querying drivers' configuration information
* Copyright (C) 2003 Felix Kuehling
*
* 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
* FELIX KUEHLING, OR ANY OTHER CONTRIBUTORS 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.
*
*/
#define GLX_GLXEXT_PROTOTYPES
#include <GL/glx.h>
#include <GL/glxext.h>
#include <X11/Xlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
typedef const char * glXGetScreenDriver_t (Display *dpy, int scrNum);
typedef const char * glXGetDriverConfig_t (const char *driverName);
static glXGetScreenDriver_t *GetScreenDriver;
static glXGetDriverConfig_t *GetDriverConfig;
enum INFO_FUNC {
LIST, NSCREENS, DRIVER, OPTIONS
};
void printUsage (void);
void printUsage (void) {
fprintf (stderr,
"Usage: xdriinfo [-display <dpy>] [command]\n"
"Commands:\n"
" nscreens print the number of screens on display\n"
" driver screen print the DRI driver name of screen\n"
" options screen|driver print configuration information about screen or driver\n"
"If no command is given then the DRI drivers for all screens are listed.\n");
}
int main (int argc, char *argv[]) {
Display *dpy;
int nScreens, screenNum, i;
enum INFO_FUNC func = LIST;
char *funcArg = NULL;
char *dpyName = NULL;
GetScreenDriver = (glXGetScreenDriver_t *)glXGetProcAddressARB ((const GLubyte *)"glXGetScreenDriver");
GetDriverConfig = (glXGetDriverConfig_t *)glXGetProcAddressARB ((const GLubyte *)"glXGetDriverConfig");
if (!GetScreenDriver || !GetDriverConfig) {
fprintf (stderr, "libGL is too old.\n");
return 1;
}
/* parse the command line */
for (i = 1; i < argc; ++i) {
char **argPtr = NULL;
if (!strcmp (argv[i], "-display"))
argPtr = &dpyName;
else if (!strcmp (argv[i], "nscreens"))
func = NSCREENS;
else if (!strcmp (argv[i], "driver")) {
func = DRIVER;
argPtr = &funcArg;
} else if (!strcmp (argv[i], "options")) {
func = OPTIONS;
argPtr = &funcArg;
} else {
printUsage ();
return 1;
}
if (argPtr) {
if (++i == argc) {
printUsage ();
return 1;
}
*argPtr = argv[i];
}
}
/* parse screen number argument */
if (func == DRIVER || func == OPTIONS) {
if (sscanf (funcArg, "%i", &screenNum) != 1)
screenNum = -1;
else if (screenNum < 0) {
fprintf (stderr, "Negative screen number \"%s\".\n", funcArg);
return 1;
}
}
/* if the argument to the options command is a driver name, we can handle
* it without opening an X connection */
if (func == OPTIONS && screenNum == -1) {
const char *options = (*GetDriverConfig) (funcArg);
if (!options) {
fprintf (stderr,
"Driver \"%s\" is not installed or does not support configuration.\n",
funcArg);
return 1;
}
printf ("%s", options);
if (isatty (STDOUT_FILENO))
printf ("\n");
return 0;
}
/* driver command needs a valid screen number */
else if (func == DRIVER && screenNum == -1) {
fprintf (stderr, "Invalid screen number \"%s\".\n", funcArg);
return 1;
}
/* open display and count the number of screens */
if (!(dpy = XOpenDisplay (dpyName))) {
fprintf (stderr, "Error: Couldn't open display\n");
return 1;
}
nScreens = ScreenCount (dpy);
/* final check on the screen number argument (if any)*/
if ((func == DRIVER || func == OPTIONS) && screenNum >= nScreens) {
fprintf (stderr, "Screen number \"%d\" out of range.\n", screenNum);
return 1;
}
switch (func) {
case NSCREENS:
printf ("%d", nScreens);
if (isatty (STDOUT_FILENO))
printf ("\n");
break;
case DRIVER: {
const char *name = (*GetScreenDriver) (dpy, screenNum);
if (!name) {
fprintf (stderr, "Screen \"%d\" is not direct rendering capable.\n",
screenNum);
return 1;
}
printf ("%s", name);
if (isatty (STDOUT_FILENO))
printf ("\n");
break;
}
case OPTIONS: {
const char *name = (*GetScreenDriver) (dpy, screenNum), *options;
if (!name) {
fprintf (stderr, "Screen \"%d\" is not direct rendering capable.\n",
screenNum);
return 1;
}
options = (*GetDriverConfig) (name);
if (!options) {
fprintf (stderr,
"Driver \"%s\" is not installed or does not support configuration.\n",
name);
return 1;
}
printf ("%s", options);
if (isatty (STDOUT_FILENO))
printf ("\n");
break;
}
case LIST:
for (i = 0; i < nScreens; ++i) {
const char *name = (*GetScreenDriver) (dpy, i);
if (name)
printf ("Screen %d: %s\n", i, name);
else
printf ("Screen %d: not direct rendering capable.\n", i);
}
}
return 0;
}
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