From 85e9ba49580e307e1213c87cdbfdc301848f497f Mon Sep 17 00:00:00 2001
From: Miikka Heikkinen <miikka.heikkinen@digia.com>
Date: Tue, 20 Nov 2012 13:23:27 +0200
Subject: [PATCH] Fix black screen after minimizing OpenGL window with ANGLE

CreateTexture will fail on zero dimensions, so just release old target
and reset dimensions when resetSwapChain is called with zero size area.

Task-number: QTBUG-27994
Change-Id: I1e500c4fd4b92f7d9ea2a49a44f3fb930b575cd1
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
---
 src/3rdparty/angle/src/libEGL/Surface.cpp |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/src/3rdparty/angle/src/libEGL/Surface.cpp b/src/3rdparty/angle/src/libEGL/Surface.cpp
index 8e920ab..174b403 100644
--- a/src/3rdparty/angle/src/libEGL/Surface.cpp
+++ b/src/3rdparty/angle/src/libEGL/Surface.cpp
@@ -224,6 +224,22 @@ bool Surface::resetSwapChain(int backbufferWidth, int backbufferHeight)
         pShareHandle = &mShareHandle;
     }
 
+    // CreateTexture will fail on zero dimensions, so just release old target
+    if (!backbufferWidth || !backbufferHeight)
+    {
+        if (mRenderTarget)
+        {
+            mRenderTarget->Release();
+            mRenderTarget = NULL;
+        }
+
+        mWidth = backbufferWidth;
+        mHeight = backbufferHeight;
+        mPresentIntervalDirty = false;
+
+        return true;
+    }
+
     result = device->CreateTexture(backbufferWidth, backbufferHeight, 1, D3DUSAGE_RENDERTARGET,
                                    mConfig->mRenderTargetFormat, D3DPOOL_DEFAULT, &mOffscreenTexture, pShareHandle);
     if (FAILED(result))
-- 
1.7.4.msysgit.0