X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Futil%2Fformat_srgb.h;h=596af56f4cd84af182010a774a96e54c1d8acd8e;hb=c977567db65e3430d1b7323f698d17bea58624e9;hp=34b50afe3d1d3287be42fdea2b5fef92ffb54429;hpb=bc2470d5d3e9788af8d6aee0a001b7de9cd4972b;p=mesa.git

diff --git a/src/util/format_srgb.h b/src/util/format_srgb.h
index 34b50afe3d1..596af56f4cd 100644
--- a/src/util/format_srgb.h
+++ b/src/util/format_srgb.h
@@ -54,6 +54,20 @@ extern const unsigned
 util_format_linear_to_srgb_helper_table[104];
 
 
+static inline float
+util_format_srgb_to_linear_float(float cs)
+{
+   if (cs <= 0.0f)
+      return 0.0f;
+   else if (cs <= 0.04045f)
+      return cs / 12.92f;
+   else if (cs < 1.0f)
+      return powf((cs + 0.055) / 1.055f, 2.4f);
+   else
+      return 1.0f;
+}
+
+
 static inline float
 util_format_linear_to_srgb_float(float cl)
 {