From 5fbd63116d427656c30bb92f1e2a8b6221912324 Mon Sep 17 00:00:00 2001
From: past-due <30942300+past-due@users.noreply.github.com>
Date: Thu, 9 Nov 2023 12:11:29 -0500
Subject: [PATCH] [OpenGL] Provide a visible fatal error if shader can't be
 read

---
 lib/ivis_opengl/gfx_api_gl.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/ivis_opengl/gfx_api_gl.cpp b/lib/ivis_opengl/gfx_api_gl.cpp
index ab679a130ea..bc2b3ed51d2 100644
--- a/lib/ivis_opengl/gfx_api_gl.cpp
+++ b/lib/ivis_opengl/gfx_api_gl.cpp
@@ -1207,7 +1207,11 @@ std::string gl_pipeline_state_object::readShaderBuf(const std::string& name, std
 	char *buffer;
 
 	fp = PHYSFS_openRead(name.c_str());
-	ASSERT_OR_RETURN(nullptr, fp != nullptr, "Could not open %s", name.c_str());
+	if (fp == nullptr)
+	{
+		debug(LOG_FATAL, "Failed to read required shader file: %s\nPlease remove any mods and/or reinstall Warzone 2100.", name.c_str());
+		return "";
+	}
 	debug(LOG_3D, "Reading...[directory: %s] %s", PHYSFS_getRealDir(name.c_str()), name.c_str());
 	filesize = PHYSFS_fileLength(fp);
 	buffer = (char *)malloc(filesize + 1);