1 files changed, 71 insertions, 0 deletions
diff --git a/intern/cycles/util/util_color.h b/intern/cycles/util/util_color.h
new file mode 100644
index 00000000000..8b4a175f498
--- /dev/null
+++ b/intern/cycles/util/util_color.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright 2011, Blender Foundation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __UTIL_COLOR_H__
+#define __UTIL_COLOR_H__
+
+#include "util_math.h"
+#include "util_types.h"
+
+CCL_NAMESPACE_BEGIN
+
+__device float color_srgb_to_scene_linear(float c)
+{
+	if(c < 0.04045f)
+		return (c < 0.0f)? 0.0f: c * (1.0f/12.92f);
+	else
+		return pow((c + 0.055f)*(1.0f/1.055f), 2.4f);
+}
+
+__device float color_scene_linear_to_srgb(float c)
+{
+	if(c < 0.0031308f)
+		return (c < 0.0f)? 0.0f: c * 12.92f;
+    else
+		return 1.055f * pow(c, 1.0f/2.4f) - 0.055f;
+}
+
+#ifndef __KERNEL_OPENCL__
+
+__device float3 color_srgb_to_scene_linear(float3 c)
+{
+	return make_float3(
+		color_srgb_to_scene_linear(c.x),
+		color_srgb_to_scene_linear(c.y),
+		color_srgb_to_scene_linear(c.z));
+}
+
+__device float3 color_scene_linear_to_srgb(float3 c)
+{
+	return make_float3(
+		color_scene_linear_to_srgb(c.x),
+		color_scene_linear_to_srgb(c.y),
+		color_scene_linear_to_srgb(c.z));
+}
+
+#endif
+
+__device float linear_rgb_to_gray(float3 c)
+{
+	return c.x*0.2126f + c.y*0.7152f + c.z*0.0722f;
+}
+
+CCL_NAMESPACE_END
+
+#endif /* __UTIL_COLOR_H__ */
+