Dest alpha mask: Try some rules that seem to make sense from what we …

…know now.
hrydgard · Dec 4, 2013 · 10b9e83 · 10b9e83 · hrydgard · Dec 4, 2013
1 parent 7881cf2
commit 10b9e83
Showing 1 changed file with 13 additions and 0 deletions.
diff --git a/GPU/GLES/StateMapping.cpp b/GPU/GLES/StateMapping.cpp
@@ -339,6 +339,19 @@ void TransformDrawEngine::ApplyDrawState(int prim) {
 		bool gmask = ((gstate.pmskc >> 8) & 0xFF) < 128;
 		bool bmask = ((gstate.pmskc >> 16) & 0xFF) < 128;
 		bool amask = (gstate.pmska & 0xFF) < 128;
+
+		if (gstate.isModeClear()) {
+			// Clear mode? Obey the clear mode alpha mask (works opposite)
+			if (gstate.isClearModeAlphaMask()) {
+				amask = false;
+			}
+		} else {
+			// Let's not write to alpha if stencil isn't enabled.
+			if (!gstate.isStencilTestEnabled()) {
+				amask = false;
+			}
+		}
+
 		glstate.colorMask.set(rmask, gmask, bmask, amask);
 
 		// Stencil Test