From 1fa80e7478a118b5d537e823dab75cd3157edb6d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Branimir=20Karad=C5=BEi=C4=87?= <branimirkaradzic@gmail.com>
Date: Wed, 2 Mar 2016 08:40:05 -0800
Subject: [PATCH] GL: Prevent memory stomp when shader has more samplers than
 allowed. Issue #704.

---
 src/renderer_gl.cpp | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/src/renderer_gl.cpp b/src/renderer_gl.cpp
index bb9b2bf2..7fc65a3d 100644
--- a/src/renderer_gl.cpp
+++ b/src/renderer_gl.cpp
@@ -3706,9 +3706,19 @@ namespace bgfx { namespace gl
 			case GL_IMAGE_CUBE:
 			case GL_INT_IMAGE_CUBE:
 			case GL_UNSIGNED_INT_IMAGE_CUBE:
-				BX_TRACE("Sampler #%d at location %d.", m_numSamplers, loc);
-				m_sampler[m_numSamplers] = loc;
-				m_numSamplers++;
+				if (m_numSamplers < BX_COUNTOF(m_sampler) )
+				{
+					BX_TRACE("Sampler #%d at location %d.", m_numSamplers, loc);
+					m_sampler[m_numSamplers] = loc;
+					m_numSamplers++;
+				}
+				else
+				{
+					BX_TRACE("Too many samplers (max: %d)! Sampler at location %d."
+							, BX_COUNTOF(m_sampler)
+							, loc
+							);
+				}
 				break;
 
 			default: