Update glstate.cpp

Fixes the GL blend formula for Subtractive blending
Ancurio · Sep 19, 2021 · cf6403a · cf6403a
1 parent f138731
commit cf6403a
Showing 1 changed file with 1 addition and 2 deletions.
diff --git a/src/glstate.cpp b/src/glstate.cpp
@@ -84,10 +84,9 @@ void GLBlendMode::apply(const BlendType &value)
 		break;
 
 	case BlendSubstraction :
-		// FIXME Alpha calculation is untested
 		gl.BlendEquation(GL_FUNC_REVERSE_SUBTRACT);
 		gl.BlendFuncSeparate(GL_SRC_ALPHA, GL_ONE,
-		                     GL_ONE,       GL_ONE);
+		                     GL_ZERO,      GL_ONE);
 		break;
 	}
 }