From: cloudwalk <cloudwalk@d7cf8633-e32d-0410-b094-e92efae38249>
Date: Tue, 19 May 2020 18:52:55 +0000 (+0000)
Subject: Reset r_shadow_occlusion_buf on vid_restart. Fixes query buffer dangling pointer
X-Git-Url: https://git.rm.cloudns.org/?a=commitdiff_plain;h=d49e641a29b050a1caf9f54f991034efa4dbb0e2;p=xonotic%2Fdarkplaces.git

Reset r_shadow_occlusion_buf on vid_restart. Fixes query buffer dangling pointer

Basically, when coronas appear when r_coronas_occlusionquery is 1, the engine
binds to a query buffer and stores a pointer to it in r_shadow_occlusion_buf.
Upon vid_restart, somewhere along the way, the buffer is cleared but the
original pointer is kept, resulting in a crash next time a corona appears.

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@12541 d7cf8633-e32d-0410-b094-e92efae38249
---

diff --git a/gl_rmain.c b/gl_rmain.c
index 2897c78f..5d5f29c4 100644
--- a/gl_rmain.c
+++ b/gl_rmain.c
@@ -3085,6 +3085,8 @@ static void gl_main_start(void)
 #endif
 }
 
+extern unsigned int r_shadow_occlusion_buf;
+
 static void gl_main_shutdown(void)
 {
 	R_RenderTarget_FreeUnused(true);
@@ -3105,7 +3107,7 @@ static void gl_main_shutdown(void)
 #endif
 		break;
 	}
-
+	r_shadow_occlusion_buf = 0;
 	r_numqueries = 0;
 	r_maxqueries = 0;
 	memset(r_queries, 0, sizeof(r_queries));