initial commit, 4.5 stable

thirdparty/cvtt/ConvectionKernels_Util.h

@@ -0,0 +1,21 @@
+#pragma once
+
+#include "ConvectionKernels_ParallelMath.h"
+
+namespace cvtt
+{
+    struct PixelBlockU8;
+    struct PixelBlockS8;
+    struct Options;
+}
+
+namespace cvtt
+{
+    namespace Util
+    {
+        // Signed input blocks are converted into unsigned space, with the maximum value being 254
+        void BiasSignedInput(PixelBlockU8 inputNormalized[ParallelMath::ParallelSize], const PixelBlockS8 inputSigned[ParallelMath::ParallelSize]);
+        void FillWeights(const Options &options, float channelWeights[4]);
+        void ComputeTweakFactors(int tweak, int range, float *outFactors);
+    }
+}