Implemented minimum FBO size on the ShaderEffectSource.

Task-number: QTBUG-20193

Change-Id: I45020c094c4a4892c055700f084fde7b219cdc10
Reviewed-on: http://codereview.qt.nokia.com/2972
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Gunnar Sletta <gunnar.sletta@nokia.com>

2 files changed, 16 insertions, 0 deletions

diff --git a/src/declarative/scenegraph/qsgcontext.cpp b/src/declarative/scenegraph/qsgcontext.cpp
index 1f6f6e1e2a..2a9e007264 100644
--- a/src/declarative/scenegraph/qsgcontext.cpp
+++ b/src/declarative/scenegraph/qsgcontext.cpp
@@ -398,6 +398,21 @@ QSGTexture *QSGContext::createTexture(const QImage &image) const
 
 
 /*!
+    Returns the minimum supported framebuffer object size.
+ */
+
+QSize QSGContext::minimumFBOSize() const
+{
+#ifdef Q_WS_MAC
+    return QSize(33, 33);
+#else
+    return QSize(1, 1);
+#endif
+}
+
+
+
+/*!
     Returns a material shader for the given material.
  */
 
diff --git a/src/declarative/scenegraph/qsgcontext_p.h b/src/declarative/scenegraph/qsgcontext_p.h
index be7dff880a..29a5aac4b9 100644
--- a/src/declarative/scenegraph/qsgcontext_p.h
+++ b/src/declarative/scenegraph/qsgcontext_p.h
@@ -102,6 +102,7 @@ public:
                                                      QSize *size,
                                                      const QSize &requestSize);
     virtual QSGTexture *createTexture(const QImage &image = QImage()) const;
+    virtual QSize minimumFBOSize() const;
 
     static QSGContext *createDefaultContext();