SDL: Added a fast path for converting the same format and pitch

SDL Commits
1 
From 9267930fea7df02610063608882ac7cc9925dfd4 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Wed, 19 Feb 2025 22:36:13 -0800
Subject: [PATCH] Added a fast path for converting the same format and pitch

---
 src/video/SDL_surface.c | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/src/video/SDL_surface.c b/src/video/SDL_surface.c
index dfb2d0d077eaa..945fda606db2a 100644
--- a/src/video/SDL_surface.c
+++ b/src/video/SDL_surface.c
@@ -2298,13 +2298,17 @@ bool SDL_ConvertPixelsAndColorspace(int width, int height,
 
     // Fast path for same format copy
     if (src_format == dst_format && src_colorspace == dst_colorspace) {
-        int i;
-        const int bpp = SDL_BYTESPERPIXEL(src_format);
-        width *= bpp;
-        for (i = height; i--;) {
-            SDL_memcpy(dst, src, width);
-            src = (const Uint8 *)src + src_pitch;
-            dst = (Uint8 *)dst + dst_pitch;
+        if (src_pitch == dst_pitch) {
+            SDL_memcpy(dst, src, height * src_pitch);
+        } else {
+            int i;
+            const int bpp = SDL_BYTESPERPIXEL(src_format);
+            width *= bpp;
+            for (i = height; i--;) {
+                SDL_memcpy(dst, src, width);
+                src = (const Uint8 *)src + src_pitch;
+                dst = (Uint8 *)dst + dst_pitch;
+            }
         }
         return true;
     }