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Viewport scaling and display density independence

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The view is scaled to be as large as possible, without changing the aspect, within the bounds of the window.
On "retina" displays, or other displays where window units != pixels, the view should no longer draw incorrectly.
This commit is contained in:
Kevin Hartman 2014-08-29 22:23:12 -07:00 • committed by Tony Wasserka
parent c8d933a142
commit 221a9b023d
7 changed files with 89 additions and 4 deletions
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24
src/citra_qt/bootmanager.cpp
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@ -2,6 +2,12 @@
#include <QKeyEvent>
#include <QApplication>
#if QT_VERSION >= QT_VERSION_CHECK(5, 0, 0)
// Required for screen DPI information
#include <QScreen>
#include <QWindow>
#endif
#include "common/common.h"
#include "bootmanager.hxx"
@ -176,6 +182,24 @@ void GRenderWindow::PollEvents() {
*/
}
// On Qt 5.1+, this correctly gets the size of the framebuffer (pixels).
//
// Older versions get the window size (density independent pixels),
// and hence, do not support DPI scaling ("retina" displays).
// The result will be a viewport that is smaller than the extent of the window.
void GRenderWindow::GetFramebufferSize(int* fbWidth, int* fbHeight)
{
#if QT_VERSION >= QT_VERSION_CHECK(5, 1, 0)
int pixelRatio = child->QPaintDevice::devicePixelRatio();
*fbWidth = child->QPaintDevice::width() * pixelRatio;
*fbHeight = child->QPaintDevice::height() * pixelRatio;
#else
*fbWidth = child->QPaintDevice::width();
*fbHeight = child->QPaintDevice::height();
#endif
}
void GRenderWindow::BackupGeometry()
{
geometry = ((QGLWidget*)this)->saveGeometry();