Fix rounding in MULT_DIV_255

2026-03-23 17:10:44 +00:00 · 2024-07-03 14:36:50 +01:00
parent b7b513b70b
commit 5d875aa94e
1 changed files with 1 additions and 0 deletions
--- a/src/video/SDL_blit.h
+++ b/src/video/SDL_blit.h
@@ -513,6 +513,7 @@ extern SDL_BlitFunc SDL_CalculateBlitA(SDL_Surface *surface);
 #define MULT_DIV_255(sC, dC, out) \
    do {                          \
        Uint16 x = sC * dC;       \
+        x += 0x1U;                \
        x += x >> 8;              \
        out = x >> 8;             \
    } while (0)