Module Name: xsrc
Committed By: jmcneill
Date: Sat Oct 22 22:05:27 UTC 2011
Added Files:
xsrc/local/programs/xsetwallpaper: xsetwallpaper.c
Log Message:
xsetwallpaper is a utility to load images into the X11 root window.
To generate a diff of this commit:
cvs rdiff -u -r0 -r1.1 xsrc/local/programs/xsetwallpaper/xsetwallpaper.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Added files:
Index: xsrc/local/programs/xsetwallpaper/xsetwallpaper.c
diff -u /dev/null xsrc/local/programs/xsetwallpaper/xsetwallpaper.c:1.1
--- /dev/null Sat Oct 22 22:05:27 2011
+++ xsrc/local/programs/xsetwallpaper/xsetwallpaper.c Sat Oct 22 22:05:27 2011
@@ -0,0 +1,188 @@
+/* $NetBSD: xsetwallpaper.c,v 1.1 2011/10/22 22:05:27 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2011 Jared D. McNeill <jmcne...@invisible.ca>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__RCSID("$NetBSD: xsetwallpaper.c,v 1.1 2011/10/22 22:05:27 jmcneill Exp $");
+
+#include <err.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <X11/Xlib.h>
+
+#include "stbi.h"
+
+#define DEFAULT_FILL_COLOR "#000000"
+
+static void
+usage(const char *pn)
+{
+ fprintf(stderr, "usage: %s [-f fillcolor] filename\n", pn);
+ exit(EXIT_FAILURE);
+}
+
+int
+main(int argc, char *argv[])
+{
+ const char *fill_color = DEFAULT_FILL_COLOR;
+ const char *pn = argv[0];
+ uint8_t *data;
+ unsigned int root_width, root_height, root_border_width, root_depth;
+ int root_x, root_y;
+ int bitmap_pad, srcx, srcy, dstx, dsty;
+ int imagew, imageh, imagebpp;
+ int ch, i;
+ int screen, default_depth;
+ Display *display;
+ Colormap colormap;
+ XImage *image;
+ Pixmap pixmap;
+ XColor color;
+ Window window;
+ GC gc;
+
+ while ((ch = getopt(argc, argv, "f:h")) != -1) {
+ switch (ch) {
+ case 'f':
+ fill_color = optarg;
+ break;
+ case 'h':
+ default:
+ usage(pn);
+ /* NOTREACHED */
+ }
+ }
+ argc -= optind;
+ argv += optind;
+
+ if (argc != 1)
+ usage(pn);
+
+ /* Load the image */
+ data = stbi_load(argv[0], &imagew, &imageh, &imagebpp, 4);
+ if (data == NULL)
+ errx(EXIT_FAILURE, "failed to load %s", argv[0]);
+
+ /* swap red and blue */
+ for (i = 0; i < imagew * imageh * 4; i += 4) {
+ uint8_t p;
+ p = data[i + 0];
+ data[i + 0] = data[i + 2];
+ data[i + 2] = p;
+ }
+
+#ifdef DEBUG
+ printf("%s: %dx%d %dbpp\n", argv[0], imagew, imageh, imagebpp * 8);
+#endif
+
+ /* open the display */
+ display = XOpenDisplay(NULL);
+ if (display == NULL) {
+ errx(EXIT_FAILURE, "couldn't open display: %s",
+ getenv("DISPLAY"));
+ }
+ screen = DefaultScreen(display);
+ default_depth = DefaultDepth(display, screen);
+ colormap = DefaultColormap(display, 0);
+
+ /* get root window geometry */
+ if (!XGetGeometry(display, XDefaultRootWindow(display), &window,
+ &root_x, &root_y, &root_width, &root_height,
+ &root_border_width, &root_depth)) {
+ errx(EXIT_FAILURE, "couldn't get screen dimensions\n");
+ }
+
+#ifdef DEBUG
+ printf("screen is %dx%d\n", root_width, root_height);
+#endif
+
+ XSync(display, False);
+
+ /* Parse the fill colour and allocate it */
+ if (!XParseColor(display, colormap, fill_color, &color)) {
+ errx(EXIT_FAILURE, "couldn't parse color '%s'", fill_color);
+ }
+ if (!XAllocColor(display, colormap, &color)) {
+ errx(EXIT_FAILURE, "XAllocColor failed");
+ }
+
+ /* Create an XImage from our raw image data */
+ if (default_depth >= 24)
+ bitmap_pad = 32;
+ else if (default_depth >= 16)
+ bitmap_pad = 16;
+ else
+ bitmap_pad = 8;
+ image = XCreateImage(display, CopyFromParent, imagebpp * 8,
+ ZPixmap, 0, (char *)data, imagew, imageh, bitmap_pad, 0);
+ if (image == NULL) {
+ errx(EXIT_FAILURE, "XCreateImage failed");
+ }
+ XInitImage(image);
+ image->byte_order = LSBFirst; /* ??? */
+
+ /* Create a graphics context for our new pixmap */
+ gc = XCreateGC(display, window, 0, NULL);
+
+ /* Create a pixmap the size of the root window */
+ pixmap = XCreatePixmap(display, window,
+ root_width, root_height, root_depth);
+
+ /* Fill the background with the specified fill colour */
+ XSetForeground(display, gc, color.pixel);
+ XFillRectangle(display, pixmap, gc, 0, 0, root_width, root_height);
+
+ /* Copy the image to the pixmal, centering it on screen */
+ if ((unsigned int)imagew > root_width) {
+ srcx = (imagew - root_width) / 2;
+ dstx = 0;
+ } else {
+ srcx = 0;
+ dstx = (root_width - imagew) / 2;
+ }
+ if ((unsigned int)imageh > root_height) {
+ srcy = (imageh - root_height) / 2;
+ dsty = 0;
+ } else {
+ srcy = 0;
+ dsty = (root_height - imageh) / 2;
+ }
+ XPutImage(display, pixmap, gc, image,
+ srcx, srcy, dstx, dsty,
+ root_width, root_height);
+
+ /* Set the background pixmap for the window */
+ XSetWindowBackgroundPixmap(display, window, pixmap);
+ XClearWindow(display, window);
+
+ /* Cleanup */
+ XFreePixmap(display, pixmap);
+ XCloseDisplay(display);
+
+ return EXIT_SUCCESS;
+}
