Improve calculation of brighter colors

The old code did not brighten up "pure" colors like "red", "green" and "blue"
at all. The new code use a different precomputed LUT which is based upon
simplified vector math, see the comments in FbTk/ColorLUT.cc

1 files changed, 8 insertions, 0 deletions

diff --git a/src/FbTk/ColorLUT.hh b/src/FbTk/ColorLUT.hh
index 66b8493..a9ff410 100644
--- a/src/FbTk/ColorLUT.hh
+++ b/src/FbTk/ColorLUT.hh
@@ -24,10 +24,18 @@ namespace FbTk {
 
 namespace ColorLUT {
 
+#if 0 // unused
 extern const unsigned char PRE_MULTIPLY_1_5[256];
 extern const unsigned char PRE_MULTIPLY_1_125[256];
+#endif
 extern const unsigned char PRE_MULTIPLY_0_75[256];
 
+extern const unsigned char BRIGHTER_4[256];
+extern const unsigned char BRIGHTER_8[256];
+#if 0 // unused
+extern const unsigned char BRIGHTER_16[256];
+#endif
+
 }
 
 }