Author: Carlos Lopez <genet...@gmail.com>
Date: Thu Apr 11 18:31:18 2013 +0200
CairoColor: add specialisation for blend method MULTIPLY
---
synfig-core/src/synfig/color.cpp | 24 ++++++++++++++++++++++++
1 files changed, 24 insertions(+), 0 deletions(-)
diff --git a/synfig-core/src/synfig/color.cpp b/synfig-core/src/synfig/color.cpp
index 68b3f33..d5ed717 100644
--- a/synfig-core/src/synfig/color.cpp
+++ b/synfig-core/src/synfig/color.cpp
@@ -626,6 +626,30 @@ blendfunc_MULTIPLY(C &a,C &b,float amount)
return b;
}
+template <>
+CairoColor
+blendfunc_MULTIPLY(CairoColor &a,CairoColor &b, float amount)
+{
+ if(amount<0) a=~a, amount=-amount;
+ amount*=a.get_a()/255;
+ int ra, ga, ba, aa;
+ int rb, gb, bb, ab;
+ int rc, gc, bc, ac;
+
+ ra=a.get_r();
+ ga=a.get_g();
+ ba=a.get_b();
+
+ rb=b.get_r();
+ gb=b.get_g();
+ bb=b.get_b();
+
+ b.set_r((rb*ra/255-rb)*(amount)+rb);
+ b.set_g((gb*ga/255-gb)*(amount)+gb);
+ b.set_b((bb*ba/255-bb)*(amount)+bb);
+ return b;
+}
+
template <class C>
static C
blendfunc_DIVIDE(C &a,C &b,float amount)
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