From 4dc8f884dee3a21f918cf9859d53277437833044 Mon Sep 17 00:00:00 2001
From: Nimrod Gileadi <nimrod@google.com>
Date: Mon, 5 Aug 2024 08:46:48 -0700
Subject: [PATCH] Check for texid >= 0 before accessing texture arrays.

PiperOrigin-RevId: 659567553
Change-Id: Ia4aaa85b85e3f27e632c03a9f50b10894d29a97b
---
 src/render/render_gl3.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/render/render_gl3.c b/src/render/render_gl3.c
index 06ded789..b00003ae 100644
--- a/src/render/render_gl3.c
+++ b/src/render/render_gl3.c
@@ -95,7 +95,7 @@ static void settexture(int type, int state, const mjrContext* con, const mjvGeom
   // explicit texture coordinates
   else if (type == mjtexREGULAR && geom->texcoord) {
     // enable
-    if (state) {
+    if (state && texid >= 0) {
       glActiveTexture(GL_TEXTURE0);
       glEnable(GL_TEXTURE_2D);
       glBindTexture(GL_TEXTURE_2D, con->texture[texid]);
@@ -109,7 +109,7 @@ static void settexture(int type, int state, const mjrContext* con, const mjvGeom
   }
 
   // 2D
-  else if (type == mjtexREGULAR && con->textureType[texid] == mjTEXTURE_2D) {
+  else if (type == mjtexREGULAR && texid >= 0 && con->textureType[texid] == mjTEXTURE_2D) {
     // enable
     if (state) {
       glActiveTexture(GL_TEXTURE0);
@@ -161,7 +161,7 @@ static void settexture(int type, int state, const mjrContext* con, const mjvGeom
   // cube or skybox
   else {
     // enable
-    if (state) {
+    if (state && texid >= 0) {
       glActiveTexture(GL_TEXTURE0);
       glEnable(GL_TEXTURE_CUBE_MAP);
       glEnable(GL_TEXTURE_GEN_S);