From f50c5821243fcaa0ee094a5ca206c350e721cea3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jakub=20Czeka=C5=84ski?= <ja.czekanski@gmail.com>
Date: Tue, 3 Dec 2019 14:49:51 +0100
Subject: [PATCH] gpu: copy bits from textured polygon commands to e1

Fixes Tekken 3 Health bar and Worms Armageddon menu and player names
---
 src/device/gpu/gpu.cpp | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/device/gpu/gpu.cpp b/src/device/gpu/gpu.cpp
index acea2e7..cb72a49 100644
--- a/src/device/gpu/gpu.cpp
+++ b/src/device/gpu/gpu.cpp
@@ -288,6 +288,18 @@ void GPU::cmdPolygon(PolygonArgs arg) {
         triangle.clut.x = tex.getClutX();
         triangle.clut.y = tex.getClutY();
         triangle.transparency = tex.semiTransparencyBlending();
+
+        // Copy texture bits from Polygon draw command to E1 register
+        // texpagex, texpagey, semi-transparency, texture disable bits
+        const uint32_t E1_MASK = 0b00001001'11111111;
+
+        uint16_t newBits = (tex.texpage >> 16) & E1_MASK;
+        if (!textureDisableAllowed) {
+            newBits &= ~(1 << 11);
+        }
+
+        gp0_e1._reg &= ~E1_MASK;
+        gp0_e1._reg |= newBits;
     }
 
     triangle.assureCcw();
@@ -617,6 +629,9 @@ void GPU::writeGP0(uint32_t data) {
         } else if (command == 0xe1) {
             // Draw mode setting
             gp0_e1._reg = arguments[0];
+            if (!textureDisableAllowed) {
+                gp0_e1.textureDisable = false;
+            }
         } else if (command == 0xe2) {
             // Texture window setting
             gp0_e2._reg = arguments[0];