From 3b1610da64c2ea8d4dc13cc105a1d012386195b8 Mon Sep 17 00:00:00 2001
From: Alex Zolotarev <deathbaba@gmail.com>
Date: Fri, 20 Jan 2012 03:03:44 +0300
Subject: [PATCH] Free opengl resources before allocating new ones, this fixes
 crashes with low video memory

---
 map/render_policy_st.cpp     | 4 ++++
 map/render_queue_routine.cpp | 3 +++
 yg/render_state_updater.cpp  | 3 +++
 3 files changed, 10 insertions(+)

diff --git a/map/render_policy_st.cpp b/map/render_policy_st.cpp
index b5de631ec3..11c46bc43f 100644
--- a/map/render_policy_st.cpp
+++ b/map/render_policy_st.cpp
@@ -105,6 +105,7 @@ RenderPolicyST::RenderPolicyST(VideoTimer * videoTimer,
 
   rmp.fitIntoLimits();
 
+  m_resourceManager.reset();
   m_resourceManager.reset(new yg::ResourceManager(rmp));
 
   Platform::FilesList fonts;
@@ -123,8 +124,10 @@ RenderPolicyST::RenderPolicyST(VideoTimer * videoTimer,
   p.m_isSynchronized = false;
   p.m_useGuiResources = true;
 
+  m_drawer.reset();
   m_drawer.reset(new DrawerYG(p));
 
+  m_windowHandle.reset();
   m_windowHandle.reset(new WindowHandle());
 
   m_windowHandle->setUpdatesEnabled(false);
@@ -132,6 +135,7 @@ RenderPolicyST::RenderPolicyST(VideoTimer * videoTimer,
   m_windowHandle->setVideoTimer(videoTimer);
   m_windowHandle->setRenderContext(primaryRC);
 
+  m_renderQueue.reset();
   m_renderQueue.reset(new RenderQueue(GetPlatform().SkinName(),
                 false,
                 false,
diff --git a/map/render_queue_routine.cpp b/map/render_queue_routine.cpp
index dba00ff874..097bfd3a99 100644
--- a/map/render_queue_routine.cpp
+++ b/map/render_queue_routine.cpp
@@ -75,6 +75,7 @@ void RenderQueueRoutine::onSize(int w, int h)
   size_t texW = m_renderState->m_textureWidth;
   size_t texH = m_renderState->m_textureHeight;
 
+  m_newDepthBuffer.reset();
   m_newDepthBuffer.reset(new yg::gl::RenderBuffer(texW, texH, true));
   m_newActualTarget = m_resourceManager->createRenderTarget(texW, texH);
   m_newBackBuffer = m_resourceManager->createRenderTarget(texW, texH);
@@ -563,7 +564,9 @@ void RenderQueueRoutine::addCommand(render_fn_t const & fn, ScreenBase const & f
 void RenderQueueRoutine::initializeGL(shared_ptr<yg::gl::RenderContext> const & renderContext,
                                       shared_ptr<yg::ResourceManager> const & resourceManager)
 {
+  m_frameBuffer.reset();
   m_frameBuffer.reset(new yg::gl::FrameBuffer());
+  m_auxFrameBuffer.reset();
   m_auxFrameBuffer.reset(new yg::gl::FrameBuffer());
   m_renderContext = renderContext;
   m_resourceManager = resourceManager;
diff --git a/yg/render_state_updater.cpp b/yg/render_state_updater.cpp
index 36e08eeb12..29784a26e8 100644
--- a/yg/render_state_updater.cpp
+++ b/yg/render_state_updater.cpp
@@ -28,7 +28,10 @@ namespace yg
       m_updateInterval(params.m_updateInterval)
     {
       if ((m_doPeriodicalUpdate) && (!m_auxFrameBuffer))
+      {
+        m_auxFrameBuffer.reset();
         m_auxFrameBuffer.reset(new FrameBuffer());
+      }
     }
 
     shared_ptr<RenderState> const & RenderStateUpdater::renderState() const