From 2661f62e645a7d25bdb05c56423a83673c1d71ee Mon Sep 17 00:00:00 2001
From: sokripon <sokripon@gmail.com>
Date: Mon, 29 Dec 2025 05:26:46 +0100
Subject: [PATCH] Fix texture loading for indexed images by converting to RGBA
 format

---
 texture.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/texture.cpp b/texture.cpp
index 488d965..569680d 100644
--- a/texture.cpp
+++ b/texture.cpp
@@ -259,6 +259,16 @@ void TextureResource::load(bool reload) {
 
         if(surface==0) throw TextureException(filename);
 
+        // Convert indexed images to RGBA for OpenGL compatibility
+        if(surface->format->BytesPerPixel == 1) {
+            SDL_Surface* converted = SDL_ConvertSurfaceFormat(surface, SDL_PIXELFORMAT_RGBA32, 0);
+            SDL_FreeSurface(surface);
+            surface = converted;
+            if(surface == 0) {
+                throw TextureException(filename);
+            }
+        }
+
         w = surface->w;
         h = surface->h;