filters/color-grading: Replace log10 command for GLSL (#510)

Xaymar · Apr 12, 2021 · f3eb5f0 · f3eb5f0
1 parent 9e6ed9a
commit f3eb5f0
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Showing 2 changed files with 10 additions and 2 deletions.
diff --git a/data/effects/color-grade.effect b/data/effects/color-grade.effect
@@ -86,13 +86,13 @@ float3 grade_tint(float3 v) {
 
 	if (pTintMode == TINT_MODE_LINEAR) { // Linear
 	} else if (pTintMode == TINT_MODE_EXP) { // Exp
-		value = 1.0 - exp2(value * pTintExponent * -C_log2_e);		
+		value = 1.0 - exp2(value * pTintExponent * -C_log2_e);
 	} else if (pTintMode == TINT_MODE_EXP2) { // Exp2
 		value = 1.0 - exp2(value * value * pTintExponent * pTintExponent * -C_log2_e);
 	} else if (pTintMode == TINT_MODE_LOG) { // Log
 		value = (log2(value) + 2.) / 2.333333;
 	} else if (pTintMode == TINT_MODE_LOG10) { // Log10
-		value = (log10(value) + 1.) / 2.;		
+		value = (m_log10(value) + 1.) / 2.;
 	}
 
 	float3 tint = float3(0,0,0);

diff --git a/data/effects/shared.effect b/data/effects/shared.effect
@@ -1,3 +1,11 @@
+//------------------------------------------------------------------------------
+// HLSL/GLSL Support
+//------------------------------------------------------------------------------
+// OBS Studio does not correctly translate all HLSL functionality to GLSL.
+
+// log10(x) is HLSL-exclusive and not translated by OBS Shader Parser.
+#define m_log10(x) (log(x) / log(10))
+
 //------------------------------------------------------------------------------
 // Uniforms
 //------------------------------------------------------------------------------