From d8c278bf529da00df31d125a7ad6291123ade2ef Mon Sep 17 00:00:00 2001
From: "A. Tombs" <lazylumpster+github@gmail.com>
Date: Mon, 6 Jun 2016 20:25:13 +0100
Subject: [PATCH] Add explanation of parameters to gamma test

Unlike similar test programs (e.g. tearing.c), the gamma test does not
explain the meanings of the optional parameters `h` and `f`. This patch
adds these explanations to the usage text.

Closes #775.
---
 tests/gamma.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tests/gamma.c b/tests/gamma.c
index 1efd3c7d..a80392f7 100644
--- a/tests/gamma.c
+++ b/tests/gamma.c
@@ -43,6 +43,9 @@ static GLfloat gamma_value = 1.0f;
 static void usage(void)
 {
     printf("Usage: gamma [-h] [-f]\n");
+    printf("Options:\n");
+    printf("  -f create full screen window\n");
+    printf("  -h show this help\n");
 }
 
 static void set_gamma(GLFWwindow* window, float value)