From 3c64a242bb4ec6b9802d35430ed9066ec1a6cdb0 Mon Sep 17 00:00:00 2001
From: Connor McLaughlin <mclaughc@outlook.com>
Date: Mon, 4 Nov 2019 02:56:30 +1000
Subject: [PATCH] GPU: Fix incorrect parsing of polyline commands

---
 src/core/gpu_commands.cpp | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/core/gpu_commands.cpp b/src/core/gpu_commands.cpp
index bdd77bd6a..53d70cc03 100644
--- a/src/core/gpu_commands.cpp
+++ b/src/core/gpu_commands.cpp
@@ -192,7 +192,7 @@ bool GPU::HandleRenderCommand(const u32*& command_ptr, u32 command_size)
         // polyline goes until we hit the termination code
         num_vertices = 0;
         bool found_terminator = false;
-        for (u32 pos = 1 + BoolToUInt32(!rc.shading_enable); pos < command_size; pos += words_per_vertex)
+        for (u32 pos = 1 + BoolToUInt32(rc.shading_enable); pos < command_size; pos += words_per_vertex)
         {
           if (command_ptr[pos] == 0x55555555)
           {
@@ -204,13 +204,14 @@ bool GPU::HandleRenderCommand(const u32*& command_ptr, u32 command_size)
         }
         if (!found_terminator)
           return false;
+
+        total_words = words_per_vertex * num_vertices + BoolToUInt32(!rc.shading_enable) + 1;
       }
       else
       {
         num_vertices = 2;
+        total_words = words_per_vertex * num_vertices + BoolToUInt32(!rc.shading_enable);
       }
-
-      total_words = words_per_vertex * num_vertices + BoolToUInt8(!rc.shading_enable);
     }
     break;