From 3c55f81b87f26006a8d1c7710e91ca779db5bd63 Mon Sep 17 00:00:00 2001
From: Henrik Rydgard <hrydgard@gmail.com>
Date: Sat, 18 Oct 2014 11:26:51 +0200
Subject: [PATCH] Fix #6988 (crash under startup of GTA Chinatown Wars)

---
 GPU/Directx9/TransformPipelineDX9.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/GPU/Directx9/TransformPipelineDX9.cpp b/GPU/Directx9/TransformPipelineDX9.cpp
index 986f758e6b..7fad885974 100644
--- a/GPU/Directx9/TransformPipelineDX9.cpp
+++ b/GPU/Directx9/TransformPipelineDX9.cpp
@@ -305,6 +305,9 @@ void TransformDrawEngineDX9::SubmitPrim(void *verts, void *inds, GEPrimitiveType
 	}
 	prevPrim_ = prim;
 
+	if ((vertexCount < 2 && prim > 0) || (vertexCount < 3 && prim > 2 && prim != GE_PRIM_RECTANGLES))
+		return;
+
 	SetupVertexDecoderInternal(vertType);
 
 	dec_->IncrementStat(STAT_VERTSSUBMITTED, vertexCount);
@@ -606,6 +609,7 @@ VertexArrayInfoDX9::~VertexArrayInfoDX9() {
 	}
 }
 
+// The inline wrapper in the header checks for numDrawCalls == 0
 void TransformDrawEngineDX9::DoFlush() {
 	gpuStats.numFlushes++;
 	gpuStats.numTrackedVertexArrays = (int)vai_.size();
@@ -721,7 +725,7 @@ void TransformDrawEngineDX9::DoFlush() {
 						vai->vbo->Unlock();
 						if (useElements) {
 							void * pIb;
-							u32 size =  sizeof(short) * indexGen.VertexCount();
+							u32 size = sizeof(short) * indexGen.VertexCount();
 							pD3Ddevice->CreateIndexBuffer(size, D3DUSAGE_WRITEONLY, D3DFMT_INDEX16, D3DPOOL_DEFAULT, &vai->ebo, NULL);
 							vai->ebo->Lock(0, size, &pIb, 0);
 							memcpy(pIb, decIndex, size);