[xsrc/trunk]: xsrc/local/programs/xsetwallpaper Add -s flag to scale image to...

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/xsrc/rev/74375cca99d8
branches:  trunk
changeset: 10421:74375cca99d8
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Sat Feb 08 20:29:30 2020 +0000

description:
Add -s flag to scale image to root window size.

diffstat:

 local/programs/xsetwallpaper/xsetwallpaper.c |  45 +++++++++++++++++++++++++--
 1 files changed, 41 insertions(+), 4 deletions(-)

diffs (98 lines):

diff -r 2d00cb34332d -r 74375cca99d8 local/programs/xsetwallpaper/xsetwallpaper.c
--- a/local/programs/xsetwallpaper/xsetwallpaper.c      Fri Feb 07 23:36:50 2020 +0000
+++ b/local/programs/xsetwallpaper/xsetwallpaper.c      Sat Feb 08 20:29:30 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: xsetwallpaper.c,v 1.2 2018/03/24 19:43:31 jmcneill Exp $ */
+/* $NetBSD: xsetwallpaper.c,v 1.3 2020/02/08 20:29:30 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2011 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -26,7 +26,7 @@
  */
 
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: xsetwallpaper.c,v 1.2 2018/03/24 19:43:31 jmcneill Exp $");
+__RCSID("$NetBSD: xsetwallpaper.c,v 1.3 2020/02/08 20:29:30 jmcneill Exp $");
 
 #include <sys/endian.h>
 
@@ -41,10 +41,12 @@
 
 #define DEFAULT_FILL_COLOR     "#000000"
 
+static uint8_t *       resize_nn(const uint8_t *, int, int, int, int);
+
 static void
 usage(const char *pn)
 {
-       fprintf(stderr, "usage: %s [-f fillcolor] filename\n", pn);
+       fprintf(stderr, "usage: %s [-f fillcolor] [-s] filename\n", pn);
        exit(EXIT_FAILURE);
 }
 
@@ -60,6 +62,7 @@
        int imagew, imageh, imagebpp;
        int ch, i;
        int screen, default_depth, byte_order;
+       int scale = 0;
        Display *display;
        Colormap colormap;
        XImage *image;
@@ -68,11 +71,14 @@
        Window window;
        GC gc;
 
-       while ((ch = getopt(argc, argv, "f:h")) != -1) {
+       while ((ch = getopt(argc, argv, "f:sh")) != -1) {
                switch (ch) {
                case 'f':
                        fill_color = optarg;
                        break;
+               case 's':
+                       scale = 1;
+                       break;
                case 'h':
                default:
                        usage(pn);
@@ -133,6 +139,14 @@
 
        XSync(display, False);
 
+       if (scale) {
+               data = resize_nn(data, imagew, imageh, root_width, root_height);
+               if (data == NULL)
+                       err(EXIT_FAILURE, "couldn't resize image\n");
+               imagew = root_width;
+               imageh = root_height;
+       }
+
        /* Parse the fill colour and allocate it */
        if (!XParseColor(display, colormap, fill_color, &color)) {
                errx(EXIT_FAILURE, "couldn't parse color '%s'", fill_color);
@@ -196,3 +210,26 @@
 
        return EXIT_SUCCESS;
 }
+
+static uint8_t *
+resize_nn(const uint8_t *data, int src_w, int src_h, int dst_w, int dst_h)
+{
+       const uint32_t *src;
+       uint32_t *dst;
+       int src_x, src_y, dst_x, dst_y;
+
+       src = (const uint32_t *)data;
+       dst = malloc(src_w * src_h * 4);
+       if (dst == NULL)
+               return NULL;
+
+       for (dst_y = 0; dst_y < dst_h; dst_y++) {
+               src_y = dst_y * src_h / dst_h;
+               for (dst_x = 0; dst_x < dst_w; dst_x++) {
+                       src_x = dst_x * src_w / dst_w;
+                       dst[dst_y * dst_w + dst_x] = src[src_y * src_w + src_x];
+               }
+       }
+
+       return (uint8_t *)dst;
+}