XCB: Don't override non-existent method when QT_NO_OPENGL

QBackingStore only has a toImage() method if OpenGL is enabled. I
noticed this because compilation failed for me, thanks to
Q_DECL_OVERRIDE.

qxcbbackingstore.h:60:12: error: ‘QImage QXcbBackingStore::toImage() const’ marked override, but does not override
     QImage toImage() const Q_DECL_OVERRIDE;

Change-Id: I6b45ef41c53d819d81fe657f26adc1f630fec6bb
Reviewed-by: Jørgen Lind <jorgen.lind@theqtcompany.com>

2 files changed, 3 insertions, 1 deletions

diff --git a/src/plugins/platforms/xcb/qxcbbackingstore.cpp b/src/plugins/platforms/xcb/qxcbbackingstore.cpp
index 0b9717759b..5c200b4058 100644
--- a/src/plugins/platforms/xcb/qxcbbackingstore.cpp
+++ b/src/plugins/platforms/xcb/qxcbbackingstore.cpp
@@ -287,10 +287,12 @@ void QXcbBackingStore::beginPaint(const QRegion &region)
     }
 }
 
+#ifndef QT_NO_OPENGL
 QImage QXcbBackingStore::toImage() const
 {
     return m_image && m_image->image() ? *m_image->image() : QImage();
 }
+#endif
 
 void QXcbBackingStore::flush(QWindow *window, const QRegion &region, const QPoint &offset)
 {
diff --git a/src/plugins/platforms/xcb/qxcbbackingstore.h b/src/plugins/platforms/xcb/qxcbbackingstore.h
index 342bbc856a..3a7e124b3f 100644
--- a/src/plugins/platforms/xcb/qxcbbackingstore.h
+++ b/src/plugins/platforms/xcb/qxcbbackingstore.h
@@ -56,8 +56,8 @@ public:
     void composeAndFlush(QWindow *window, const QRegion &region, const QPoint &offset,
                          QPlatformTextureList *textures, QOpenGLContext *context,
                          bool translucentBackground) Q_DECL_OVERRIDE;
-#endif
     QImage toImage() const Q_DECL_OVERRIDE;
+#endif
     void resize(const QSize &size, const QRegion &staticContents) Q_DECL_OVERRIDE;
     bool scroll(const QRegion &area, int dx, int dy) Q_DECL_OVERRIDE;