fix deco colors being 1 R/G/B value less than they should be

The proper way would be to divide by 255, but that is slower than >>8. This is a better approximation (or perhaps equivalent?)
The-Powder-Toy · Jun 18, 2017 · c1e9126 · c1e9126
1 parent 42b8f52
commit c1e9126
Showing 1 changed file with 7 additions and 6 deletions.
diff --git a/src/graphics/Renderer.cpp b/src/graphics/Renderer.cpp
@@ -1399,18 +1399,19 @@ void Renderer::render_parts()
 				//Apply decoration colour
 				if(!(colour_mode & ~COLOUR_GRAD) && decorations_enable && deca)
 				{
+					deca++;
 					if(!(pixel_mode & NO_DECO))
 					{
-						colr = (deca*decr + (255-deca)*colr) >> 8;
-						colg = (deca*decg + (255-deca)*colg) >> 8;
-						colb = (deca*decb + (255-deca)*colb) >> 8;
+						colr = (deca*decr + (256-deca)*colr) >> 8;
+						colg = (deca*decg + (256-deca)*colg) >> 8;
+						colb = (deca*decb + (256-deca)*colb) >> 8;
 					}
 
 					if(pixel_mode & DECO_FIRE)
 					{
-						firer = (deca*decr + (255-deca)*firer) >> 8;
-						fireg = (deca*decg + (255-deca)*fireg) >> 8;
-						fireb = (deca*decb + (255-deca)*fireb) >> 8;
+						firer = (deca*decr + (256-deca)*firer) >> 8;
+						fireg = (deca*decg + (256-deca)*fireg) >> 8;
+						fireb = (deca*decb + (256-deca)*fireb) >> 8;
 					}
 				}