1 files changed, 6 insertions, 2 deletions
diff --git a/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp b/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp
index 0c01263..7271740 100644
--- a/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp
+++ b/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp
@@ -316,6 +316,7 @@ extern QImage qt_imageForBrush(int brushStyle, bool invert);
 
 QGL2PaintEngineExPrivate::~QGL2PaintEngineExPrivate()
 {
+    delete shaderManager;
 }
 
 void QGL2PaintEngineExPrivate::updateTextureFilter(GLenum target, GLenum wrapMode, bool smoothPixmapTransform, GLuint id)
@@ -1330,7 +1331,8 @@ bool QGL2PaintEngineEx::begin(QPaintDevice *pdev)
     qt_resolve_version_2_0_functions(d->ctx);
 #endif
 
-    d->shaderManager = QGLEngineShaderManager::managerForContext(d->ctx);
+    if (!d->shaderManager)
+        d->shaderManager = new QGLEngineShaderManager(d->ctx);
     d->shaderManager->setDirty();
 
     glViewport(0, 0, d->width, d->height);
@@ -1430,11 +1432,13 @@ void QGL2PaintEngineEx::ensureActive()
             p->transferMode(BrushDrawingMode);
             p->drawable.doneCurrent();
         }
+        d->drawable.context()->makeCurrent();
         d->drawable.makeCurrent();
 
         ctx->d_ptr->active_engine = this;
-
         d->needsSync = true;
+    } else {
+        d->drawable.context()->makeCurrent();
     }
 
     if (d->needsSync) {