From a49944377f6d1753207597834eb3ec737edc579d Mon Sep 17 00:00:00 2001
From: Alexander Sulfrian <alexander.sulfrian@fu-berlin.de>
Date: Tue, 4 Sep 2012 15:00:40 +0200
Subject: initial commit

---
 .gitignore            |  1 +
 Makefile              |  7 +++++++
 xinerama-resolution.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 54 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Makefile
 create mode 100644 xinerama-resolution.c

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f4089d5
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+xinerama-resolution
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..758c559
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,7 @@
+TARGETS:= xinerama-resolution
+LDFLAGS:=-lX11 -lXinerama
+
+all: $(TARGETS)
+
+clean:
+	$(RM) $(TARGETS)
diff --git a/xinerama-resolution.c b/xinerama-resolution.c
new file mode 100644
index 0000000..adbd38a
--- /dev/null
+++ b/xinerama-resolution.c
@@ -0,0 +1,46 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdbool.h>
+
+#include <X11/Xlib.h>
+#include <X11/extensions/Xinerama.h>
+
+int main(int argc, char **argv)
+{
+    Display *dpy;
+    XineramaScreenInfo *xsi;
+    int i, nscreens;
+
+    dpy = XOpenDisplay(NULL);
+    if (dpy == NULL) {
+        fputs("ERROR: Could not open display!\n", stderr);
+        return EXIT_FAILURE;
+    }
+
+    /* Is xinerama extension available? */
+    if (!XineramaIsActive(dpy)) {
+        fputs("ERROR: Xinerama extension unavailable on current screen!\n", stderr);
+        return EXIT_FAILURE;
+    }
+    else {
+	xsi = XineramaQueryScreens(dpy, &nscreens);
+
+	if (argc <= 1) {	
+	    for (i = 0; i < nscreens; i++) {
+		printf("screen %d: %dx%d\n", i, xsi[i].width, xsi[i].height);
+	    }
+	}
+	else {
+	    i = atoi(argv[1]);
+	    if (i <= 0 || i > nscreens) {
+		fprintf(stderr, "ERROR: Screen %d not available!\n", i);
+	        return EXIT_FAILURE;
+	    }
+	    else
+		printf("%dx%d\n", xsi[i-1].width, xsi[i-1].height);
+	}
+    }
+
+    return EXIT_SUCCESS;
+}
+
-- 
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