From 5e61bbe586519c3d9bc636153d32e810da4e59a3 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Morten=20Johan=20S=C3=B8rvig?= Date: Tue, 20 Nov 2012 11:34:52 +0100 Subject: Basic high-dpi "retina" support for Qt 5. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Bring Qt 5 on par with Qt 4, prepare for more comprehensive support later on. Introduce device independent pixels (dips), device pixels, and devicePixelRatio. Add high-dpi support to QPainter, QGLWidget, the cocoa platform plugin, mac and fusion styles. Dips are similar to CSS pixels, Apple points and Android density-independent pixels. Device pixels are pixels in the backing store/physical pixels on screen. devicePixelRatio is the ratio between them, which is 1.0 on standard displays and 2.0 on "retina" displays. New API: QImage::devicePixelRatio() and setDevicePixelRatio() QPixmap::devicePixelRatio() and setDevicePixelRatio() QWindow::devicePixelRatio() QScreen::devicePixelRatio() QGuiApplicaiton::devicePixelRatio() Change-Id: If98c3ca9bfdf0e1bdbcf7574cd5b912c9ff63856 Reviewed-by: Morten Johan Sørvig Reviewed-by: Gunnar Sletta --- src/opengl/qgl_qpa.cpp | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'src/opengl/qgl_qpa.cpp') diff --git a/src/opengl/qgl_qpa.cpp b/src/opengl/qgl_qpa.cpp index ba07f6121c..0e8b8abb4f 100644 --- a/src/opengl/qgl_qpa.cpp +++ b/src/opengl/qgl_qpa.cpp @@ -370,7 +370,10 @@ void QGLWidget::resizeEvent(QResizeEvent *e) makeCurrent(); if (!d->glcx->initialized()) glInit(); - resizeGL(width(), height()); + const qreal scaleFactor = (window() && window()->windowHandle()) ? + window()->windowHandle()->devicePixelRatio() : 1.0; + + resizeGL(width() * scaleFactor, height() * scaleFactor); } -- cgit v1.2.3