From 3361ea211450846f0f08bd218c2fcb56d375fa4e Mon Sep 17 00:00:00 2001
From: Nico de Poel <ndepoel@gmail.com>
Date: Wed, 21 Apr 2021 18:01:19 +0200
Subject: [PATCH] Added some missing lines and made a few tweaks to allow Quake
 to run headless without crashing

---
 engine/Quake/gl_draw.c            |  3 +++
 engine/UniQuake/stub/stub_vidgl.c | 13 ++++++++-----
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/engine/Quake/gl_draw.c b/engine/Quake/gl_draw.c
index 0f67904..90877fd 100644
--- a/engine/Quake/gl_draw.c
+++ b/engine/Quake/gl_draw.c
@@ -506,6 +506,9 @@ void Draw_Pic (int x, int y, qpic_t *pic)
 {
 	glpic_t			*gl;
 
+	if (!pic)
+		return;
+
 	if (scrap_dirty)
 		Scrap_Upload ();
 	gl = (glpic_t *)pic->data;
diff --git a/engine/UniQuake/stub/stub_vidgl.c b/engine/UniQuake/stub/stub_vidgl.c
index b9775bf..27198c7 100644
--- a/engine/UniQuake/stub/stub_vidgl.c
+++ b/engine/UniQuake/stub/stub_vidgl.c
@@ -6,7 +6,7 @@ viddef_t vid;	// global video state
 modestate_t modestate = MS_UNINIT;
 
 int			gl_stencilbits = 0;
-qboolean	gl_texture_NPOT = false;
+qboolean	gl_texture_NPOT = true;	// No need to resample textures to power-of-two sizes
 qboolean	gl_glsl_gamma_able = false;
 qboolean	gl_mtexable = false;
 float		gl_max_anisotropy = 1;
@@ -22,12 +22,15 @@ void VID_Init(void)
 	Cvar_RegisterVariable(&vid_contrast);
 
 	memset(&vid, 0, sizeof(viddef_t));
-	vid.width = 1;
-	vid.height = 1;
-	vid.conwidth = 1;
-	vid.conheight = 1;
+	vid.width = 320;
+	vid.height = 200;
+	vid.conwidth = 320;
+	vid.conheight = 200;
 	vid.maxwarpwidth = 320;
 	vid.maxwarpheight = 200;
+
+	vid.colormap = host_colormap;
+	vid.fullbright = 256 - LittleLong(*((int *)vid.colormap + 2048));
 }
 
 void VID_Shutdown(void)