From a35e4fb7cab62c072da371c97d842f35cce3b0ae Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=BA=91=E9=A3=8E?= <cloudwu@gmail.com>
Date: Fri, 3 Nov 2017 00:15:13 +0800
Subject: [PATCH] restore old flags when skip zero scissor rect (#1271)

---
 src/renderer_gl.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/renderer_gl.cpp b/src/renderer_gl.cpp
index cb485eb4e..9a9e9f3b4 100644
--- a/src/renderer_gl.cpp
+++ b/src/renderer_gl.cpp
@@ -6900,10 +6900,12 @@ namespace bgfx { namespace gl
 					continue;
 				}
 
+				const uint64_t oldFlags = currentState.m_stateFlags;
 				const uint64_t newFlags = draw.m_stateFlags;
 				uint64_t changedFlags = currentState.m_stateFlags ^ draw.m_stateFlags;
 				currentState.m_stateFlags = newFlags;
 
+				const uint64_t oldStencil = currentState.m_stencil;
 				const uint64_t newStencil = draw.m_stencil;
 				uint64_t changedStencil = currentState.m_stencil ^ draw.m_stencil;
 				currentState.m_stencil = newStencil;
@@ -6947,6 +6949,8 @@ namespace bgfx { namespace gl
 						scissorRect.setIntersect(viewScissorRect, _render->m_frameCache.m_rectCache.m_cache[scissor]);
 						if (scissorRect.isZeroArea() )
 						{
+							currentState.m_stateFlags = oldFlags;
+							currentState.m_stencil = oldStencil;
 							continue;
 						}