From 74e3b1ae1a24bfe00616dd4b8645c143cfd913b8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Johan=20Sj=C3=B6blom?= <sjoblom.johan@gmail.com>
Date: Tue, 13 Jan 2026 21:23:06 +0100
Subject: [PATCH] patterns: Add 256-colour palette to PCX

---
 patterns/pcx.hexpat | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/patterns/pcx.hexpat b/patterns/pcx.hexpat
index f67a58c1..d28b095c 100644
--- a/patterns/pcx.hexpat
+++ b/patterns/pcx.hexpat
@@ -4,6 +4,7 @@
 #pragma MIME application/x-pcx
 
 import std.io;
+import std.mem;
 
 enum Encoding : u8 {
     NoEncoding = 0x00,
@@ -52,4 +53,15 @@ struct PCX {
     padding[54];
 };
 
-PCX pcx @ 0x00;
\ No newline at end of file
+struct ExtendedPalette {
+    if (std::mem::size() > sizeof(pcx) + 256*3 + 1) {
+        if (std::mem::read_unsigned(std::mem::size() - 256*3 - 1, 1) == 0x0C) {
+            u8 extended_palette_marker @ std::mem::size() - 256*3 - 1;
+            RGB8 palette256[256] @ std::mem::size() - 256*3;
+        }
+    }
+};
+
+
+PCX pcx @ 0x00;
+ExtendedPalette ExtendedPalette @ std::mem::size();