SDL: Fixed getting an 8-bit window surface on Apple platforms

SDL Commits
1 
From 1c77304ee9cabd327cbfe9eccdbe7093f25b3ee3 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Mon, 10 Nov 2025 13:04:27 -0800
Subject: [PATCH] Fixed getting an 8-bit window surface on Apple platforms

The Metal renderer doesn't support XRGB texture formats, so we ended up matching SDL_PIXELFORMAT_INDEX8 for the window surface.
---
 src/video/SDL_video.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/video/SDL_video.c b/src/video/SDL_video.c
index ea1b634a42753..18e7bd0e0feed 100644
--- a/src/video/SDL_video.c
+++ b/src/video/SDL_video.c
@@ -430,6 +430,7 @@ static bool SDL_CreateWindowTexture(SDL_VideoDevice *_this, SDL_Window *window,
         if (!SDL_ISPIXELFORMAT_FOURCC(texture_format) &&
             !SDL_ISPIXELFORMAT_10BIT(texture_format) &&
             !SDL_ISPIXELFORMAT_FLOAT(texture_format) &&
+            !SDL_ISPIXELFORMAT_INDEXED(texture_format) &&
             transparent == SDL_ISPIXELFORMAT_ALPHA(texture_format)) {
             *format = texture_format;
             break;