1 files changed, 68 insertions, 0 deletions
diff --git a/source/blender/blenlib/tests/BLI_math_color_test.cc b/source/blender/blenlib/tests/BLI_math_color_test.cc
index 7f2c0a3f1ca..4d928477870 100644
--- a/source/blender/blenlib/tests/BLI_math_color_test.cc
+++ b/source/blender/blenlib/tests/BLI_math_color_test.cc
@@ -74,3 +74,71 @@ TEST(math_color, LinearRGBTosRGBRoundtrip)
     EXPECT_NEAR(orig_linear_color, linear_color, 1e-5);
   }
 }
+
+TEST(math_color, linearrgb_to_srgb_v3_v3)
+{
+  float srgb_color[3];
+  {
+    const float kTolerance = 1.0e-8f;
+    const float linear_color[3] = {0.0023f, 0.0024f, 0.0025f};
+    linearrgb_to_srgb_v3_v3(srgb_color, linear_color);
+    EXPECT_NEAR(0.029716f, srgb_color[0], kTolerance);
+    EXPECT_NEAR(0.031008f, srgb_color[1], kTolerance);
+    EXPECT_NEAR(0.032300f, srgb_color[2], kTolerance);
+  }
+
+  {
+    /* SIMD implementation of linear->srgb for larger inputs
+     * is less accurate; use larger tolerance. */
+    const float kTolerance = 3.6e-5f;
+    const float linear_color[3] = {0.71f, 0.75f, 0.78f};
+    linearrgb_to_srgb_v3_v3(srgb_color, linear_color);
+    EXPECT_NEAR(0.859696f, srgb_color[0], kTolerance);
+    EXPECT_NEAR(0.880825f, srgb_color[1], kTolerance);
+    EXPECT_NEAR(0.896244f, srgb_color[2], kTolerance);
+  }
+
+  {
+    /* Not a common, but possible case: values beyond 1.0 range. */
+    const float kTolerance = 2.3e-4f;
+    const float linear_color[3] = {1.5f, 2.8f, 5.6f};
+    linearrgb_to_srgb_v3_v3(srgb_color, linear_color);
+    EXPECT_NEAR(1.19418f, srgb_color[0], kTolerance);
+    EXPECT_NEAR(1.56520f, srgb_color[1], kTolerance);
+    EXPECT_NEAR(2.10771f, srgb_color[2], kTolerance);
+  }
+}
+
+TEST(math_color, srgb_to_linearrgb_v3_v3)
+{
+  float linear_color[3];
+  {
+    const float kTolerance = 1.0e-8f;
+    const float srgb_color[3] = {0.0023f, 0.0024f, 0.0025f};
+    srgb_to_linearrgb_v3_v3(linear_color, srgb_color);
+    EXPECT_NEAR(0.000178019f, linear_color[0], kTolerance);
+    EXPECT_NEAR(0.000185759f, linear_color[1], kTolerance);
+    EXPECT_NEAR(0.000193498f, linear_color[2], kTolerance);
+  }
+
+  {
+    /* SIMD implementation of linear->srgb for larger inputs
+     * is less accurate; use larger tolerance. */
+    const float kTolerance = 1.5e-7f;
+    const float srgb_color[3] = {0.71f, 0.72f, 0.73f};
+    srgb_to_linearrgb_v3_v3(linear_color, srgb_color);
+    EXPECT_NEAR(0.4623615f, linear_color[0], kTolerance);
+    EXPECT_NEAR(0.4770000f, linear_color[1], kTolerance);
+    EXPECT_NEAR(0.4919052f, linear_color[2], kTolerance);
+  }
+
+  {
+    /* Not a common, but possible case: values beyond 1.0 range. */
+    const float kTolerance = 7.7e-6f;
+    const float srgb_color[3] = {1.1f, 2.5f, 5.6f};
+    srgb_to_linearrgb_v3_v3(linear_color, srgb_color);
+    EXPECT_NEAR(1.24277f, linear_color[0], kTolerance);
+    EXPECT_NEAR(8.35473f, linear_color[1], kTolerance);
+    EXPECT_NEAR(56.23833f, linear_color[2], kTolerance);
+  }
+}