From 851e47831976d127c16a3efae4db8f3e018f6720 Mon Sep 17 00:00:00 2001
From: Jannik Vogel <email@jannikvogel.de>
Date: Sun, 17 Feb 2019 05:44:20 +0100
Subject: [PATCH] psh: Separate input component usage selection for RGB and
 ALPHA portion

---
 hw/xbox/nv2a/nv2a_psh.c | 36 +++++++++++++++++++++---------------
 1 file changed, 21 insertions(+), 15 deletions(-)

diff --git a/hw/xbox/nv2a/nv2a_psh.c b/hw/xbox/nv2a/nv2a_psh.c
index eb5fb291bb..97c807cf99 100644
--- a/hw/xbox/nv2a/nv2a_psh.c
+++ b/hw/xbox/nv2a/nv2a_psh.c
@@ -296,24 +296,30 @@ static QString* get_input_var(struct PixelShader *ps, struct InputInfo in, bool
 {
     QString *reg = get_var(ps, in.reg, false);
 
-    switch (in.chan) {
-    case PS_CHANNEL_RGB:
-        if (is_alpha) {
-            qstring_append(reg, ".b");
-        } else {
+    if (!is_alpha) {
+        switch (in.chan) {
+        case PS_CHANNEL_RGB:
             qstring_append(reg, ".rgb");
-        }
-        break;
-    case PS_CHANNEL_ALPHA:
-        if (is_alpha) {
-            qstring_append(reg, ".a");
-        } else {
+            break;
+        case PS_CHANNEL_ALPHA:
             qstring_append(reg, ".aaa");
+            break;
+        default:
+            assert(false);
+            break;
+        }
+    } else {
+        switch (in.chan) {
+        case PS_CHANNEL_BLUE:
+            qstring_append(reg, ".b");
+            break;
+        case PS_CHANNEL_ALPHA:
+            qstring_append(reg, ".a");
+            break;
+        default:
+            assert(false);
+            break;
         }
-        break;
-    default:
-        assert(false);
-        break;
     }
 
     QString *res;