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Use backing store also with wayland platform
Like with macOS, the Wayland compositor seems to require a
backingstore when doing partial updates like we do.
This extends the mechanism that has been introduced for macOS. This
has to be done at run time, not compile time.
Fixes bug #11692.
(cherry picked from commit 575761c665)
This commit is contained in:
Jean-Marc Lasgouttes
parent
69031bb2ce
commit
aaf96b3025
@ -239,13 +239,27 @@ SyntheticMouseEvent::SyntheticMouseEvent()
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GuiWorkArea::Private::Private(GuiWorkArea * parent)
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: p(parent), buffer_view_(0), lyx_view_(0),
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caret_(0), caret_visible_(false),
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need_resize_(false), preedit_lines_(1),
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last_pixel_ratio_(1.0),
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completer_(new GuiCompleter(p, p)), dialog_mode_(false), shell_escape_(false),
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read_only_(false), clean_(true), externally_modified_(false)
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: p(parent), buffer_view_(0), lyx_view_(0), caret_(0),
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caret_visible_(false), need_resize_(false), preedit_lines_(1),
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last_pixel_ratio_(1.0), completer_(new GuiCompleter(p, p)),
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dialog_mode_(false), shell_escape_(false), read_only_(false),
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clean_(true), externally_modified_(false)
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{
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/* Qt on macOS and Wayland does not respect the
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* Qt::WA_OpaquePaintEvent attribute and resets the widget backing
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* store at each update. Therefore, we use our own backing store in
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* these two cases. */
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#if QT_VERSION >= 0x050000
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use_backingstore_ = guiApp->platformName() == "cocoa"
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|| guiApp->platformName().contains("wayland");
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#else
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# ifdef Q_OS_MAC
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use_backingstore_ = true;
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# else
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use_backingstore_ = false;
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# endif
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#endif
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int const time = QApplication::cursorFlashTime() / 2;
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if (time > 0) {
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caret_timeout_.setInterval(time);
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@ -1257,6 +1271,41 @@ void GuiWorkArea::Private::paintPreeditText(GuiPainter & pain)
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}
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void GuiWorkArea::Private::resetScreen()
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{
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if (use_backingstore_) {
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int const pr = p->pixelRatio();
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screen_ = QImage(static_cast<int>(pr * p->viewport()->width()),
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static_cast<int>(pr * p->viewport()->height()),
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QImage::Format_ARGB32_Premultiplied);
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# if QT_VERSION >= 0x050000
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screen_.setDevicePixelRatio(pr);
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# endif
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}
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}
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QPaintDevice * GuiWorkArea::Private::screenDevice()
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{
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if (use_backingstore_)
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return &screen_;
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else
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return p->viewport();
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}
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void GuiWorkArea::Private::updateScreen(QRectF const & rc)
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{
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if (use_backingstore_) {
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QPainter qpain(p->viewport());
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double const pr = p->pixelRatio();
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QRectF const rcs = QRectF(rc.x() * pr, rc.y() * pr,
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rc.width() * pr, rc.height() * pr);
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qpain.drawImage(rc, screen_, rcs);
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}
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}
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void GuiWorkArea::paintEvent(QPaintEvent * ev)
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{
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// Do not trigger the painting machinery if we are not ready (see
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@ -20,14 +20,6 @@
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#include <QMouseEvent>
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#include <QTimer>
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#ifdef Q_OS_MAC
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/* Qt on macOS does not respect the Qt::WA_OpaquePaintEvent attribute
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* and resets the widget backing store at each update. Therefore, we
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* use our own backing store in this case */
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#define LYX_BACKINGSTORE 1
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#include <QPainter>
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#endif
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namespace lyx {
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class Buffer;
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@ -107,37 +99,12 @@ struct GuiWorkArea::Private
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void paintPreeditText(GuiPainter & pain);
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void resetScreen() {
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#ifdef LYX_BACKINGSTORE
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int const pr = p->pixelRatio();
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screen_ = QImage(static_cast<int>(pr * p->viewport()->width()),
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static_cast<int>(pr * p->viewport()->height()),
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QImage::Format_ARGB32_Premultiplied);
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# if QT_VERSION >= 0x050000
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screen_.setDevicePixelRatio(pr);
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# endif
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#endif
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}
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QPaintDevice * screenDevice() {
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#ifdef LYX_BACKINGSTORE
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return &screen_;
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#else
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return p->viewport();
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#endif
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}
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#ifdef LYX_BACKINGSTORE
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void updateScreen(QRectF const & rc) {
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QPainter qpain(p->viewport());
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double const pr = p->pixelRatio();
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QRectF const rcs = QRectF(rc.x() * pr, rc.y() * pr,
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rc.width() * pr, rc.height() * pr);
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qpain.drawImage(rc, screen_, rcs);
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}
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#else
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void updateScreen(QRectF const & ) {}
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#endif
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/// Prepare screen for next painting
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void resetScreen();
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/// Where painting takes place
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QPaintDevice * screenDevice();
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/// Put backingstore to screen if necessary
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void updateScreen(QRectF const & rc);
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///
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GuiWorkArea * p;
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@ -146,10 +113,11 @@ struct GuiWorkArea::Private
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///
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GuiView * lyx_view_;
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#ifdef LYX_BACKINGSTORE
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/// Do we need an intermediate image when painting (for now macOS and Wayland)
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bool use_backingstore_;
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///
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QImage screen_;
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#endif
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///
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CaretWidget * caret_;
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/// is the caret currently displayed
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@ -34,6 +34,7 @@ What's new
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- Do not issue error dialog when no tag is found in git repository for
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tree-revision info inset.
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- Fix display with Wayland (bug 11692).
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* DOCUMENTATION AND LOCALIZATION
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