Hard-assert on something that has bitten me too many times now.

[movit] / test_util.cpp

diff --git a/test_util.cpp b/test_util.cpp
index b377309638114057f2d99a56c852ee010bebb18f..05eac31451f833687eff9b552abd098dbfcbbcc6 100644 (file)
--- a/test_util.cpp
+++ b/test_util.cpp
@@ -351,4 +351,24 @@ void test_accuracy(const float *expected, const float *result, unsigned num_valu
        EXPECT_LT(rms, rms_limit);
 }
 
+double srgb_to_linear(double x)
+{
+       // From the Wikipedia article on sRGB.
+       if (x < 0.04045) {
+               return x / 12.92;
+       } else {
+               return pow((x + 0.055) / 1.055, 2.4);
+       }
+}
+
+double linear_to_srgb(double x)
+{
+       // From the Wikipedia article on sRGB.
+       if (x < 0.0031308) {
+               return 12.92 * x;
+       } else {
+               return 1.055 * pow(x, 1.0 / 2.4) - 0.055;
+       }
+}
+
 }  // namespace movit