From 07022840acb8fee22f3c0727861743916fd44ca2 Mon Sep 17 00:00:00 2001
From: Window Maker <wmaker@localhost>
Date: Sun, 24 May 2026 14:38:14 +0200
Subject: [PATCH] wl_backend: add X11 rgb.txt color name lookup

The named color table only had basic colors (black, white, red, etc.)
but Window Maker backgrounds use extended X11 color names like
deepskyblue4, tomato4, blue4. Now falls back to parsing
/usr/share/X11/rgb.txt for any unrecognized color name.

Fixes Sunset and other multi-color gradient backgrounds that use
X11 named colors.
---
 src/backend/wayland/wl_backend.c | 36 ++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/src/backend/wayland/wl_backend.c b/src/backend/wayland/wl_backend.c
index 35ceada..43d34aa 100644
--- a/src/backend/wayland/wl_backend.c
+++ b/src/backend/wayland/wl_backend.c
@@ -8767,6 +8767,42 @@ static int wl_get_color_for_colormap(unsigned long colormap,
         }
     }
 
+    /* Look up in X11 rgb.txt database */
+    {
+        static const char *rgb_paths[] = {
+            "/usr/share/X11/rgb.txt",
+            "/usr/lib/X11/rgb.txt",
+            "/etc/X11/rgb.txt",
+            NULL
+        };
+        FILE *f = NULL;
+        for (int i = 0; rgb_paths[i] && !f; i++)
+            f = fopen(rgb_paths[i], "r");
+        if (f) {
+            char line[256];
+            while (fgets(line, sizeof(line), f)) {
+                unsigned int rv, gv, bv;
+                char name[128];
+                if (line[0] == '!' || line[0] == '#')
+                    continue;
+                if (sscanf(line, "%u %u %u %127[^\n]", &rv, &gv, &bv, name) == 4) {
+                    /* Trim leading whitespace/tabs from name */
+                    char *n = name;
+                    while (*n == ' ' || *n == '\t') n++;
+                    if (strcasecmp(n, color_name) == 0) {
+                        color->red = rv << 8 | rv;
+                        color->green = gv << 8 | gv;
+                        color->blue = bv << 8 | bv;
+                        color->pixel = (0xFF << 24) | (rv << 16) | (gv << 8) | bv;
+                        fclose(f);
+                        return 1;
+                    }
+                }
+            }
+            fclose(f);
+        }
+    }
+
     wwarning(_("could not parse color \"%s\" (Wayland)"), color_name);
     return 0;
 }