Initial revision

1 files changed, 184 insertions, 0 deletions

diff --git a/xdriinfo.c b/xdriinfo.c
new file mode 100644
index 0000000..7d788e3
--- /dev/null
+++ b/xdriinfo.c
@@ -0,0 +1,184 @@
+/*
+ * 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.
+ * 
+ */
+
+#include <GL/glx.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);
+
+glXGetScreenDriver_t *GetScreenDriver;
+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 *)glXGetProcAddress ("glXGetScreenDriver");
+    GetDriverConfig = (glXGetDriverConfig_t *)glXGetProcAddress ("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;
+}