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From d9793fed272bd2edc52f92496768242ff2fc0847 Mon Sep 17 00:00:00 2001
From: Jungi Byun <jungi.byun@lge.com>
Date: Wed, 27 Jan 2021 08:24:23 +0900
Subject: [PATCH] Replace scale with devicePixelRatio for non-integer scaling
The 'scale' event from wayland cannot support non-integer scaling
which was originally supported in Qt.
As default, devicePixelRatio follows the 'scale' so that the high DPI
still works as the mechanism in Wayland. But if non-integer scaling
factor such as 150% is needed, it can be supported to override the
devicePixelRatio.
Change-Id: I63a04db27bd521264b6d0904e1ddd05a572dc970
Reviewed-by: Elvis Lee <kwangwoong.lee@lge.com>
Reviewed-by: Jungi Byun <jungi.byun@lge.com>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
(cherry picked from commit cf98abbc6ae9ba9373803ffe193f839324e0c80b)
---
src/client/qwaylandabstractdecoration.cpp | 2 +-
src/client/qwaylandshmbackingstore.cpp | 6 +++---
src/client/qwaylandshmbackingstore_p.h | 2 +-
src/client/qwaylandwindow.cpp | 16 ++++++++--------
src/client/qwaylandwindow_p.h | 2 +-
.../client/wayland-egl/qwaylandglcontext.cpp | 2 +-
6 files changed, 15 insertions(+), 15 deletions(-)
--- a/src/client/qwaylandabstractdecoration.cpp
+++ b/src/client/qwaylandabstractdecoration.cpp
@@ -122,7 +122,7 @@ const QImage &QWaylandAbstractDecoration::contentImage()
if (d->m_isDirty) {
// Update the decoration backingstore
- const int bufferScale = waylandWindow()->scale();
+ const qreal bufferScale = waylandWindow()->scale();
const QSize imageSize = waylandWindow()->surfaceSize() * bufferScale;
d->m_decorationContentImage = QImage(imageSize, QImage::Format_ARGB32_Premultiplied);
// Only scale by buffer scale, not QT_SCALE_FACTOR etc.
--- a/src/client/qwaylandshmbackingstore.cpp
+++ b/src/client/qwaylandshmbackingstore.cpp
@@ -72,7 +72,7 @@ QT_BEGIN_NAMESPACE
namespace QtWaylandClient {
QWaylandShmBuffer::QWaylandShmBuffer(QWaylandDisplay *display,
- const QSize &size, QImage::Format format, int scale)
+ const QSize &size, QImage::Format format, qreal scale)
{
int stride = size.width() * 4;
int alloc = stride * size.height();
@@ -114,7 +114,7 @@ QWaylandShmBuffer::QWaylandShmBuffer(QWaylandDisplay *display,
QWaylandShm* shm = display->shm();
wl_shm_format wl_format = shm->formatFrom(format);
mImage = QImage(data, size.width(), size.height(), stride, format);
- mImage.setDevicePixelRatio(qreal(scale));
+ mImage.setDevicePixelRatio(scale);
mShmPool = wl_shm_create_pool(shm->object(), fd, alloc);
init(wl_shm_pool_create_buffer(mShmPool,0, size.width(), size.height(),
@@ -277,7 +277,7 @@ QWaylandShmBuffer *QWaylandShmBackingStore::getBuffer(const QSize &size)
void QWaylandShmBackingStore::resize(const QSize &size)
{
QMargins margins = windowDecorationMargins();
- int scale = waylandWindow()->scale();
+ qreal scale = waylandWindow()->scale();
QSize sizeWithMargins = (size + QSize(margins.left()+margins.right(),margins.top()+margins.bottom())) * scale;
// We look for a free buffer to draw into. If the buffer is not the last buffer we used,
--- a/src/client/qwaylandshmbackingstore_p.h
+++ b/src/client/qwaylandshmbackingstore_p.h
@@ -71,7 +71,7 @@ class QWaylandWindow;
class Q_WAYLAND_CLIENT_EXPORT QWaylandShmBuffer : public QWaylandBuffer {
public:
QWaylandShmBuffer(QWaylandDisplay *display,
- const QSize &size, QImage::Format format, int scale = 1);
+ const QSize &size, QImage::Format format, qreal scale = 1);
~QWaylandShmBuffer() override;
QSize size() const override { return mImage.size(); }
int scale() const override { return int(mImage.devicePixelRatio()); }
--- a/src/client/qwaylandwindow.cpp
+++ b/src/client/qwaylandwindow.cpp
@@ -185,7 +185,7 @@ void QWaylandWindow::initWindow()
// typically be integer 1 (normal-dpi) or 2 (high-dpi). Call set_buffer_scale()
// to inform the compositor that high-resolution buffers will be provided.
if (mDisplay->compositorVersion() >= 3)
- mSurface->set_buffer_scale(scale());
+ mSurface->set_buffer_scale(mScale);
if (QScreen *s = window()->screen())
setOrientationMask(s->orientationUpdateMask());
@@ -572,9 +572,9 @@ void QWaylandWindow::damage(const QRect &rect)
if (mSurface == nullptr)
return;
- const int s = scale();
+ const qreal s = scale();
if (mDisplay->compositorVersion() >= 4)
- mSurface->damage_buffer(s * rect.x(), s * rect.y(), s * rect.width(), s * rect.height());
+ mSurface->damage_buffer(qFloor(s * rect.x()), qFloor(s * rect.y()), qCeil(s * rect.width()), qCeil(s * rect.height()));
else
mSurface->damage(rect.x(), rect.y(), rect.width(), rect.height());
}
@@ -613,9 +613,9 @@ void QWaylandWindow::commit(QWaylandBuffer *buffer, const QRegion &damage)
attachOffset(buffer);
if (mDisplay->compositorVersion() >= 4) {
- const int s = scale();
+ const qreal s = scale();
for (const QRect &rect: damage)
- mSurface->damage_buffer(s * rect.x(), s * rect.y(), s * rect.width(), s * rect.height());
+ mSurface->damage_buffer(qFloor(s * rect.x()), qFloor(s * rect.y()), qCeil(s * rect.width()), qCeil(s * rect.height()));
} else {
for (const QRect &rect: damage)
mSurface->damage(rect.x(), rect.y(), rect.width(), rect.height());
@@ -1106,14 +1106,14 @@ bool QWaylandWindow::isActive() const
return mDisplay->isWindowActivated(this);
}
-int QWaylandWindow::scale() const
+qreal QWaylandWindow::scale() const
{
- return mScale;
+ return devicePixelRatio();
}
qreal QWaylandWindow::devicePixelRatio() const
{
- return mScale;
+ return qreal(mScale);
}
bool QWaylandWindow::setMouseGrabEnabled(bool grab)
--- a/src/client/qwaylandwindow_p.h
+++ b/src/client/qwaylandwindow_p.h
@@ -158,7 +158,7 @@ public:
void setMask(const QRegion ®ion) override;
- int scale() const;
+ qreal scale() const;
qreal devicePixelRatio() const override;
void requestActivateWindow() override;
--- a/src/hardwareintegration/client/wayland-egl/qwaylandglcontext.cpp
+++ b/src/hardwareintegration/client/wayland-egl/qwaylandglcontext.cpp
@@ -195,7 +195,7 @@ public:
QOpenGLTextureCache *cache = QOpenGLTextureCache::cacheForContext(m_context->context());
QSize surfaceSize = window->surfaceSize();
- int scale = window->scale() ;
+ qreal scale = window->scale() ;
glViewport(0, 0, surfaceSize.width() * scale, surfaceSize.height() * scale);
//Draw Decoration
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