From f0c1e89443436a55f43b907a570a9c6bb8c55566 Mon Sep 17 00:00:00 2001
From: Joshua Ashton <joshua@froggi.es>
Date: Sat, 1 May 2021 10:00:53 +0100
Subject: [PATCH] [d3d9] Handle zero-sized draws

These return S_OK, because ofc they do.
---
 src/d3d9/d3d9_device.cpp | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/d3d9/d3d9_device.cpp b/src/d3d9/d3d9_device.cpp
index f7723723..242e6f3f 100644
--- a/src/d3d9/d3d9_device.cpp
+++ b/src/d3d9/d3d9_device.cpp
@@ -2333,6 +2333,9 @@ namespace dxvk {
           D3DPRIMITIVETYPE PrimitiveType,
           UINT             StartVertex,
           UINT             PrimitiveCount) {
+	if (unlikely(!PrimitiveCount))
+	  return S_OK;
+
     D3D9DeviceLock lock = LockDevice();
 
     PrepareDraw(PrimitiveType);
@@ -2363,6 +2366,9 @@ namespace dxvk {
           UINT             NumVertices,
           UINT             StartIndex,
           UINT             PrimitiveCount) {
+	if (unlikely(!PrimitiveCount))
+	  return S_OK;
+
     D3D9DeviceLock lock = LockDevice();
 
     PrepareDraw(PrimitiveType);
@@ -2393,6 +2399,9 @@ namespace dxvk {
           UINT             PrimitiveCount,
     const void*            pVertexStreamZeroData,
           UINT             VertexStreamZeroStride) {
+	if (unlikely(!PrimitiveCount))
+	  return S_OK;
+
     D3D9DeviceLock lock = LockDevice();
 
     PrepareDraw(PrimitiveType);
@@ -2440,6 +2449,9 @@ namespace dxvk {
           D3DFORMAT        IndexDataFormat,
     const void*            pVertexStreamZeroData,
           UINT             VertexStreamZeroStride) {
+	if (unlikely(!PrimitiveCount))
+	  return S_OK;
+
     D3D9DeviceLock lock = LockDevice();
 
     PrepareDraw(PrimitiveType);