From 44551dad2d636e1edb508b730f7a691a5ef4f33b Mon Sep 17 00:00:00 2001
From: curt <curt>
Date: Mon, 22 Mar 2004 19:12:07 +0000
Subject: [PATCH] Better color component sanity checking.

---
 simgear/screen/colors.hxx | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/simgear/screen/colors.hxx b/simgear/screen/colors.hxx
index aa0d4145..40ce19e6 100644
--- a/simgear/screen/colors.hxx
+++ b/simgear/screen/colors.hxx
@@ -47,6 +47,13 @@ inline void gamma_correct_rgb(float *color,
     color[0] = pow(color[0], tmp);
     color[1] = pow(color[1], tmp);
     color[2] = pow(color[2], tmp);
+
+    if ( color[0] < 0.0 ) { color[0] = 0.0; }
+    if ( color[1] < 0.0 ) { color[1] = 0.0; }
+    if ( color[2] < 0.0 ) { color[2] = 0.0; }
+    if ( color[0] > 1.0 ) { color[0] = 1.0; }
+    if ( color[1] > 1.0 ) { color[1] = 1.0; }
+    if ( color[2] > 1.0 ) { color[2] = 1.0; }
 };
 
 inline void gamma_correct_c(float *color,
@@ -56,6 +63,8 @@ inline void gamma_correct_c(float *color,
       return;
 
    *color = pow(*color, reff/system);
+   if ( *color < 0.0 ) { *color = 0.0; }
+   if ( *color > 1.0 ) { *color = 1.0; }
 };
 
 inline void gamma_restore_rgb(float *color,
@@ -68,6 +77,13 @@ inline void gamma_restore_rgb(float *color,
     color[0] = pow(color[0], tmp);
     color[1] = pow(color[1], tmp);
     color[2] = pow(color[2], tmp);
+
+    if ( color[0] < 0.0 ) { color[0] = 0.0; }
+    if ( color[1] < 0.0 ) { color[1] = 0.0; }
+    if ( color[2] < 0.0 ) { color[2] = 0.0; }
+    if ( color[0] > 1.0 ) { color[0] = 1.0; }
+    if ( color[1] > 1.0 ) { color[1] = 1.0; }
+    if ( color[2] > 1.0 ) { color[2] = 1.0; }
 };
 
 inline void gamma_restore_c(float *color,
@@ -77,6 +93,8 @@ inline void gamma_restore_c(float *color,
       return;
 
    *color = pow(*color, system/reff);
+   if ( *color < 0.0 ) { *color = 0.0; }
+   if ( *color > 1.0 ) { *color = 1.0; }
 };
 
 
-- 
2.39.5