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-rw-r--r--src/gui/kernel/qscreen.cpp7
1 files changed, 6 insertions, 1 deletions
diff --git a/src/gui/kernel/qscreen.cpp b/src/gui/kernel/qscreen.cpp
index 479e228e27..f208eb02be 100644
--- a/src/gui/kernel/qscreen.cpp
+++ b/src/gui/kernel/qscreen.cpp
@@ -701,6 +701,11 @@ void QScreenPrivate::updatePrimaryOrientation()
border of the window. If \a height is negative, the function
copies everything to the bottom of the window.
+ The offset and size arguments are specified in device independent
+ pixels. The returned pixmap may be larger than the requested size
+ when grabbing from a high-DPI screen. Call QPixmap::devicePixelRatio()
+ to determine if this is the case.
+
The window system identifier (\c WId) can be retrieved using the
QWidget::winId() function. The rationale for using a window
identifier and not a QWidget, is to enable grabbing of windows
@@ -748,7 +753,7 @@ QPixmap QScreen::grabWindow(WId window, int x, int y, int width, int height)
QPixmap result =
platformScreen->grabWindow(window, nativePos.x(), nativePos.y(),
nativeSize.width(), nativeSize.height());
- result.setDevicePixelRatio(factor);
+ result.setDevicePixelRatio(result.devicePixelRatio() * factor);
return result;
}