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+/**
+ * @file srgb.glsl
+ *
+ * $LicenseInfo:firstyear=2007&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2007, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
+ * $/LicenseInfo$
+ */
+
+vec3 srgb_to_linear(vec3 cs)
+{
+ vec3 low_range = cs / vec3(12.92);
+ vec3 high_range = pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
+
+ bvec3 lte = lessThanEqual(cs,vec3(0.04045));
+
+ vec3 result;
+ result.r = lte.r ? low_range.r : high_range.r;
+ result.g = lte.g ? low_range.g : high_range.g;
+ result.b = lte.b ? low_range.b : high_range.b;
+ return result;
+}
+
+vec3 linear_to_srgb(vec3 cl)
+{
+ cl = clamp(cl, vec3(0), vec3(1));
+ vec3 low_range = cl * 12.92;
+ vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
+
+ bvec3 lt = lessThan(cl,vec3(0.0031308));
+
+ vec3 result;
+ result.r = lt.r ? low_range.r : high_range.r;
+ result.g = lt.g ? low_range.g : high_range.g;
+ result.b = lt.b ? low_range.b : high_range.b;
+ return result;
+}
+