From f6ba4ee4de49ceee1adedd2940cf1a30a9888545 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Henrik=20Rydg=C3=A5rd?= <hrydgard@gmail.com>
Date: Mon, 9 Oct 2023 21:14:00 +0200
Subject: [PATCH] Only support extending triangle-based draw calls. Fixes Crazy
 Taxi.

---
 GPU/GPUCommonHW.cpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/GPU/GPUCommonHW.cpp b/GPU/GPUCommonHW.cpp
index 452cc9c6acba..5e49e21f22d5 100644
--- a/GPU/GPUCommonHW.cpp
+++ b/GPU/GPUCommonHW.cpp
@@ -968,7 +968,9 @@ void GPUCommonHW::Execute_Prim(u32 op, u32 diff) {
 	const void *verts = Memory::GetPointerUnchecked(gstate_c.vertexAddr);
 	const void *inds = nullptr;
 
-	bool canExtend = true;
+	bool isTriangle = IsTrianglePrim(prim);
+
+	bool canExtend = isTriangle;
 	u32 vertexType = gstate.vertType;
 	if ((vertexType & GE_VTYPE_IDX_MASK) != GE_VTYPE_IDX_NONE) {
 		u32 indexAddr = gstate_c.indexAddr;
@@ -1008,8 +1010,6 @@ void GPUCommonHW::Execute_Prim(u32 op, u32 diff) {
 
 	uint32_t vtypeCheckMask = g_Config.bSoftwareSkinning ? (~GE_VTYPE_WEIGHTCOUNT_MASK) : 0xFFFFFFFF;
 
-	bool isTriangle = IsTrianglePrim(prim);
-
 	if (debugRecording_)
 		goto bail;
 
@@ -1044,7 +1044,7 @@ void GPUCommonHW::Execute_Prim(u32 op, u32 diff) {
 				inds = Memory::GetPointerUnchecked(gstate_c.indexAddr);
 			} else {
 				// We can extend again after submitting a normal draw.
-				canExtend = true;
+				canExtend = isTriangle;
 			}
 			drawEngineCommon_->SubmitPrim(verts, inds, newPrim, count, vertTypeID, cullMode, &bytesRead);
 			AdvanceVerts(vertexType, count, bytesRead);