hsr-outputs - command line tool to list screen sizes and positions

    $ hsr-outputs
    screen_number: 0
      x_org:	1920
      y_org:	0
      width:	1920
      height:	1080

    screen_number: 1
      x_org:	0
      y_org:	0
      width:	1920
      height:	1080

    $ ./hsr-outputs --csv
    screen_number,x_org,y_org,width,height
    0,1920,0,1920,1080
    1,0,0,1920,1080

    $ ./hsr-outputs --json
    [
      {
        "screen": 0,
        "x": 1920,
        "y": 0,
        "width": 1920,
        "height": 1080
      },
      {
        "screen": 1,
        "x": 0,
        "y": 0,
        "width": 1920,
        "height": 1080
      }
    ]

Author: himdel

.gitignore

@@ -2,3 +2,4 @@
 .*.sw[po]
 *.o
 hsetroot
+hsr-outputs

Makefile

@@ -18,14 +18,21 @@ LDFLAGS+=$(shell $(PKG_CONFIG) x11 --libs)
 CFLAGS+=$(shell $(PKG_CONFIG) imlib2 --cflags)
 LDFLAGS+=$(shell $(PKG_CONFIG) imlib2 --libs)
 
+CFLAGS+=$(shell $(PKG_CONFIG) xinerama --cflags)
+LDFLAGS+=$(shell $(PKG_CONFIG) xinerama --libs)
+
+all: hsetroot hsr-outputs
+
 hsetroot: hsetroot.o outputs_xrandr.o
 
 hsetroot.o: hsetroot.c outputs.h
 
 outputs_xrandr.o: outputs_xrandr.c outputs.h
 
+hsr-outputs: hsr-outputs.o
+
 install: hsetroot
 	install -st /usr/local/bin/ hsetroot
 
 clean:
-	rm -f hsetroot *.o
+	rm -f *.o hsetroot hsr-outputs

hsr-outputs.c

@@ -0,0 +1,84 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <X11/Xlib.h>
+#include <X11/extensions/Xinerama.h>
+
+void
+print_text(XineramaScreenInfo *si) {
+	if (! si) {
+		printf("\n");
+		return;
+	}
+
+	printf("screen_number: %d\n", si->screen_number);
+	printf("\tx_org:\t%d\n", si->x_org);
+	printf("\ty_org:\t%d\n", si->y_org);
+	printf("\twidth:\t%d\n", si->width);
+	printf("\theight:\t%d\n", si->height);
+}
+
+void
+print_csv(XineramaScreenInfo *si) {
+	if (! si)
+		return;
+
+	printf("%d,%d,%d,%d,%d\n", si->screen_number, si->x_org, si->y_org, si->width, si->height);
+}
+
+void
+print_json(XineramaScreenInfo *si) {
+	if (! si) {
+		printf(",\n");
+		return;
+	}
+
+	printf("  {\n");
+	printf("    \"screen\": %d,\n", si->screen_number);
+	printf("    \"x\": %d,\n", si->x_org);
+	printf("    \"y\": %d,\n", si->y_org);
+	printf("    \"width\": %d,\n", si->width);
+	printf("    \"height\": %d\n", si->height);
+	printf("  }");
+}
+
+enum Format { TEXT, CSV, JSON };
+
+int
+main(int argc, char **argv)
+{
+	Display *display = XOpenDisplay(NULL);
+
+	enum Format format = TEXT;
+	void (*print)(XineramaScreenInfo*) = print_text;
+
+	if ((argc > 1) && !strcmp(argv[1], "--csv")) {
+		print = print_csv;
+		format = CSV;
+	}
+	if ((argc > 1) && !strcmp(argv[1], "--json")) {
+		print = print_json;
+		format = JSON;
+	}
+
+	if (format == CSV)
+		printf("screen_number,x_org,y_org,width,height\n");
+	if (format == JSON)
+		printf("[\n");
+
+	int nscreens = 0;
+	XineramaScreenInfo *xisi = XineramaQueryScreens(display, &nscreens);
+	for (int i = 0; i < nscreens; i++) {
+		if (i)
+			print(NULL);
+		print(xisi + i);
+	}
+	XFree(xisi);
+
+	if (format == JSON)
+		printf("\n]\n");
+
+	XCloseDisplay(display);
+
+	return 0;
+}