Gamma: clamp slider to the engine's 2.6 cap, defer readback

The engine clamps mat_monitorgamma at 2.6, so the 2.8..3.0 end of the slider
did nothing. Read the value back one tick later (ClientCmd is queued) and
interpose SDL_SetWindowGammaRamp to see whether the engine pushes a ramp at
all.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/menu.cpp b/src/menu.cpp
index ead5f2d..248aa48 100644
--- a/src/menu.cpp
+++ b/src/menu.cpp
@@ -407,7 +407,7 @@ static bool config_load() {
         } else if (strcmp(key, "gamma") == 0) {
           dst = &g_gamma;
           lo = 16;
-          hi = 30;
+          hi = 26; // the engine clamps mat_monitorgamma at 2.6
           stock = 22;
         }
         if (dst) {