added @ankith suggestion

MyreMylar · web-flow · commit 4145fc336bed · 2025-08-26T16:42:11.000+01:00
diff --git a/src_c/alphablit.c b/src_c/alphablit.c
@@ -2842,7 +2842,7 @@ premul_surf_color_by_alpha(SDL_Surface *src, SDL_Surface *dst)
 #if !defined(__EMSCRIPTEN__)
 #if SDL_BYTEORDER == SDL_LIL_ENDIAN
     if ((PG_SURF_BytesPerPixel(src) == 4) &&
-        (src->pitch % PG_SURF_BytesPerPixel(src) == 0) && pg_has_avx2()) {
+        (src->pitch == (src->w * PG_SURF_BytesPerPixel(src))) && pg_has_avx2()) {
         premul_surf_color_by_alpha_avx2(src, dst);
         return 0;
     }

Original file line number	Diff line number	Diff line change
`@@ -2842,7 +2842,7 @@ premul_surf_color_by_alpha(SDL_Surface src, SDL_Surface dst)`
`2842`	`2842`	`#if !defined(__EMSCRIPTEN__)`
`2843`	`2843`	`#if SDL_BYTEORDER == SDL_LIL_ENDIAN`
`2844`	`2844`	`if ((PG_SURF_BytesPerPixel(src) == 4) &&`
`2845`		`- (src->pitch % PG_SURF_BytesPerPixel(src) == 0) && pg_has_avx2()) {`
	`2845`	`+ (src->pitch == (src->w * PG_SURF_BytesPerPixel(src))) && pg_has_avx2()) {`
`2846`	`2846`	`premul_surf_color_by_alpha_avx2(src, dst);`
`2847`	`2847`	`return 0;`
`2848`	`2848`	`}`