From 13abfc42956e176c9779ee41fddc95a4b85cb389 Mon Sep 17 00:00:00 2001
From: Andrei Karas <akaras@inbox.ru>
Date: Sun, 20 Oct 2013 15:19:01 +0300
Subject: Remove glPushMatrix and glPopMatrix from OpenGL renderers except safe
 opengl.

---
 src/render/normalopenglgraphics.cpp | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

(limited to 'src/render/normalopenglgraphics.cpp')

diff --git a/src/render/normalopenglgraphics.cpp b/src/render/normalopenglgraphics.cpp
index d78cad4ad..4222051ea 100644
--- a/src/render/normalopenglgraphics.cpp
+++ b/src/render/normalopenglgraphics.cpp
@@ -1170,7 +1170,6 @@ bool NormalOpenGLGraphics::pushClipArea(gcn::Rectangle area)
     transX += clipArea.xOffset;
     transY += clipArea.yOffset;
 
-    glPushMatrix();
     if (transX || transY)
     {
         glTranslatef(static_cast<GLfloat>(transX),
@@ -1184,13 +1183,26 @@ bool NormalOpenGLGraphics::pushClipArea(gcn::Rectangle area)
 
 void NormalOpenGLGraphics::popClipArea()
 {
+    if (mClipStack.empty())
+        return;
+
+    const gcn::ClipRectangle &clipArea1 = mClipStack.top();
+    int transX = -clipArea1.xOffset;
+    int transY = -clipArea1.yOffset;
+
     gcn::Graphics::popClipArea();
 
     if (mClipStack.empty())
         return;
 
-    glPopMatrix();
     const gcn::ClipRectangle &clipArea = mClipStack.top();
+    transX += clipArea.xOffset;
+    transY += clipArea.yOffset;
+    if (transX || transY)
+    {
+        glTranslatef(static_cast<GLfloat>(transX),
+                     static_cast<GLfloat>(transY), 0);
+    }
     glScissor(clipArea.x, mRect.h - clipArea.y - clipArea.height,
         clipArea.width, clipArea.height);
 }
-- 
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