[gnome-color-manager] trivial: truncate values less than 0.0 and greater than 1.0 when using gcm_color_convert_RGB_to_RGBi

[Richard Hughes <rhughes src gnome org>]

commit 9f4a5415369f9e65f5539778c4510aa75447de76
Author: Richard Hughes <richard hughsie com>
Date:   Sat Mar 26 18:16:49 2011 +0000

    trivial: truncate values less than 0.0 and greater than 1.0 when using gcm_color_convert_RGB_to_RGBint()

 src/gcm-color.c |   20 +++++++++++++++++---
 1 files changed, 17 insertions(+), 3 deletions(-)
---
diff --git a/src/gcm-color.c b/src/gcm-color.c
index e3281ed..143dc0c 100644
--- a/src/gcm-color.c
+++ b/src/gcm-color.c
@@ -274,6 +274,19 @@ gcm_color_convert_RGBint_to_RGB (const GcmColorRGBint *src, GcmColorRGB *dest)
 }
 
 /**
+ * gcm_color_value_double_to_uint8:
+ **/
+static guint8
+gcm_color_value_double_to_uint8 (gdouble value)
+{
+	if (value < 0)
+		return 0;
+	if (value > 1.0f)
+		return 255;
+	return value * 255.0f;
+}
+
+/**
  * gcm_color_convert_RGB_to_RGBint:
  * @src: the source color
  * @dest: the destination color
@@ -286,9 +299,10 @@ gcm_color_convert_RGB_to_RGBint (const GcmColorRGB *src, GcmColorRGBint *dest)
 	g_return_if_fail (src != NULL);
 	g_return_if_fail (dest != NULL);
 
-	dest->R = (gdouble) src->R * 255.0f;
-	dest->G = (gdouble) src->G * 255.0f;
-	dest->B = (gdouble) src->B * 255.0f;
+	/* also deal with overflow and underflow */
+	dest->R = gcm_color_value_double_to_uint8 (src->R);
+	dest->G = gcm_color_value_double_to_uint8 (src->G);
+	dest->B = gcm_color_value_double_to_uint8 (src->B);
 }
 
 /**