Merge pull request #975 from bigianb/blendfix

Implement 2000 blend mode. Used by BGDA
jpd002 · Nov 8, 2020 · 940b023 · 940b023
2 parents 1218f5a + e1b6c1b
commit 940b023
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/Source/gs/GSH_OpenGL/GSH_OpenGL.cpp b/Source/gs/GSH_OpenGL/GSH_OpenGL.cpp
@@ -820,6 +820,11 @@ void CGSH_OpenGL::SetupBlendingFunction(uint64 alphaReg)
 		glBlendColor(0, 0, 0, static_cast<float>(alpha.nFix) / 128.0f);
 		glBlendFuncSeparate(GL_ZERO, GL_CONSTANT_ALPHA, GL_ONE, GL_ZERO);
 	}
+	else if((alpha.nA == ALPHABLEND_ABD_ZERO) && (alpha.nB == ALPHABLEND_ABD_CS) && (alpha.nC == ALPHABLEND_C_AS) && (alpha.nD == ALPHABLEND_ABD_CS))
+	{
+		//2000 -> Cs * (1 - As)
+		glBlendFuncSeparate(BLEND_ONE_MINUS_SRC_ALPHA, GL_ZERO, GL_ONE, GL_ZERO);
+	}
 	else if((alpha.nA == ALPHABLEND_ABD_ZERO) && (alpha.nB == ALPHABLEND_ABD_CS) && (alpha.nC == ALPHABLEND_C_AS) && (alpha.nD == ALPHABLEND_ABD_CD))
 	{
 		//2001 -> Cd - Cs * As