From 004f25df78160d1caba2375fb2e6511a0c344bc8 Mon Sep 17 00:00:00 2001
From: Gabriel de Dietrich <gabriel.dedietrich@digia.com>
Date: Tue, 21 May 2013 18:22:27 +0200
Subject: QGLWidget: Support retina framebuffer grabbing
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And update the opengl/grabber example.

Task-number: QTBUG-31173
Change-Id: If09f1f3634b353d034f51240fc68be6ee7aabb48
Reviewed-by: Samuel Rødal <samuel.rodal@digia.com>
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>
---
 src/opengl/qgl.cpp | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

(limited to 'src/opengl')

diff --git a/src/opengl/qgl.cpp b/src/opengl/qgl.cpp
index def0470622..72c6e035d9 100644
--- a/src/opengl/qgl.cpp
+++ b/src/opengl/qgl.cpp
@@ -4090,11 +4090,12 @@ QImage QGLWidget::grabFrameBuffer(bool withAlpha)
 {
     makeCurrent();
     QImage res;
-    int w = width();
-    int h = height();
+    qreal pixelRatio = devicePixelRatio();
+    int w = pixelRatio * width();
+    int h = pixelRatio * height();
     if (format().rgba())
         res = qt_gl_read_frame_buffer(QSize(w, h), format().alpha(), withAlpha);
-
+    res.setDevicePixelRatio(pixelRatio);
     return res;
 }
 
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