SDL: Speed up full-surface fills

SDL Commits
1 
From 7a3f5ef129d7650f9b1a9077e304a15816323976 Mon Sep 17 00:00:00 2001
From: Starbuck5 <[EMAIL REDACTED]>
Date: Sat, 23 Nov 2024 14:48:52 -0800
Subject: [PATCH] Speed up full-surface fills

---
 src/video/SDL_fillrect.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/video/SDL_fillrect.c b/src/video/SDL_fillrect.c
index f8879e9930f26..f8b0ce2b31200 100644
--- a/src/video/SDL_fillrect.c
+++ b/src/video/SDL_fillrect.c
@@ -59,6 +59,13 @@ static void SDL_TARGETING("sse") SDL_FillSurfaceRect##bpp##SSE(Uint8 *pixels, in
 { \
     int i, n; \
     Uint8 *p = NULL; \
+  \
+    /* If the number of bytes per row is equal to the pitch, treat */ \
+    /* all rows as one long continuous row (for better performance) */ \
+    if ((w) * (bpp) == pitch) { \
+        w = w * h; \
+        h = 1; \
+    } \
  \
     SSE_BEGIN; \
  \