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// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include "qwaylandviewporter_p.h"
#include <QtWaylandCompositor/QWaylandSurface>
#include <QtWaylandCompositor/QWaylandCompositor>
#include <QtWaylandCompositor/private/qwaylandsurface_p.h>
QT_BEGIN_NAMESPACE
/*!
\class QWaylandViewporter
\inmodule QtWaylandCompositor
\since 5.13
\brief Provides an extension for surface resizing and cropping.
The QWaylandViewporter extension provides a way for clients to resize and crop surface
contents.
QWaylandViewporter corresponds to the Wayland interface, \c wp_viewporter.
*/
/*!
Constructs a QWaylandViewporter object.
*/
QWaylandViewporter::QWaylandViewporter()
: QWaylandCompositorExtensionTemplate<QWaylandViewporter>(*new QWaylandViewporterPrivate)
{
}
/*!
* Constructs a QWaylandViewporter object for the provided \a compositor.
*/
QWaylandViewporter::QWaylandViewporter(QWaylandCompositor *compositor)
: QWaylandCompositorExtensionTemplate<QWaylandViewporter>(compositor, *new QWaylandViewporterPrivate())
{
}
/*!
Initializes the extension.
*/
void QWaylandViewporter::initialize()
{
Q_D(QWaylandViewporter);
QWaylandCompositorExtensionTemplate::initialize();
auto *compositor = static_cast<QWaylandCompositor *>(extensionContainer());
if (!compositor) {
qWarning() << "Failed to find QWaylandCompositor when initializing QWaylandViewporter";
return;
}
d->init(compositor->display(), 1);
}
/*!
Returns the Wayland interface for the QWaylandViewporter.
*/
const wl_interface *QWaylandViewporter::interface()
{
return QWaylandViewporterPrivate::interface();
}
void QWaylandViewporterPrivate::wp_viewporter_destroy(Resource *resource)
{
// Viewport objects are allowed ot outlive the viewporter
wl_resource_destroy(resource->handle);
}
void QWaylandViewporterPrivate::wp_viewporter_get_viewport(Resource *resource, uint id, wl_resource *surfaceResource)
{
auto *surface = QWaylandSurface::fromResource(surfaceResource);
if (!surface) {
qWarning() << "Couldn't find surface for viewporter";
return;
}
auto *surfacePrivate = QWaylandSurfacePrivate::get(surface);
if (surfacePrivate->viewport) {
wl_resource_post_error(resource->handle, WP_VIEWPORTER_ERROR_VIEWPORT_EXISTS,
"viewport already exists for surface");
return;
}
surfacePrivate->viewport = new Viewport(surface, resource->client(), id);
}
QWaylandViewporterPrivate::Viewport::Viewport(QWaylandSurface *surface, wl_client *client, int id)
: QtWaylandServer::wp_viewport(client, id, /*version*/ 1)
, m_surface(surface)
{
Q_ASSERT(surface);
}
QWaylandViewporterPrivate::Viewport::~Viewport()
{
if (m_surface) {
auto *surfacePrivate = QWaylandSurfacePrivate::get(m_surface);
Q_ASSERT(surfacePrivate->viewport == this);
surfacePrivate->viewport = nullptr;
}
}
// This function has to be called immediately after a surface is committed, before no
// other client events have been dispatched, or we may incorrectly error out on an
// incomplete pending state. See comment below.
void QWaylandViewporterPrivate::Viewport::checkCommittedState()
{
auto *surfacePrivate = QWaylandSurfacePrivate::get(m_surface);
// We can't use the current state for destination/source when checking,
// as that has fallbacks to the buffer size so we can't distinguish
// between the set/unset case. We use the pending state because no other
// requests has modified it yet.
QSize destination = surfacePrivate->pending.destinationSize;
QRectF source = surfacePrivate->pending.sourceGeometry;
if (!destination.isValid() && source.size() != source.size().toSize()) {
wl_resource_post_error(resource()->handle, error_bad_size,
"non-integer size (%fx%f) with unset destination",
source.width(), source.height());
return;
}
if (m_surface->bufferSize().isValid()) {
QRectF max = QRectF(QPointF(), m_surface->bufferSize() / m_surface->bufferScale());
// We can't use QRectF.contains, because that would return false for values on the border
if (max.united(source) != max) {
wl_resource_post_error(resource()->handle, error_out_of_buffer,
"source %f,%f, %fx%f extends outside attached buffer %fx%f",
source.x(), source.y(), source.width(), source.height(),
max.width(), max.height());
return;
}
}
}
void QWaylandViewporterPrivate::Viewport::wp_viewport_destroy_resource(Resource *resource)
{
Q_UNUSED(resource);
delete this;
}
void QWaylandViewporterPrivate::Viewport::wp_viewport_destroy(Resource *resource)
{
if (m_surface) {
auto *surfacePrivate = QWaylandSurfacePrivate::get(m_surface);
surfacePrivate->pending.destinationSize = QSize();
surfacePrivate->pending.sourceGeometry = QRectF();
}
wl_resource_destroy(resource->handle);
}
void QWaylandViewporterPrivate::Viewport::wp_viewport_set_source(QtWaylandServer::wp_viewport::Resource *resource, wl_fixed_t x, wl_fixed_t y, wl_fixed_t width, wl_fixed_t height)
{
Q_UNUSED(resource);
if (!m_surface) {
wl_resource_post_error(resource->handle, error_no_surface,
"set_source requested for destroyed surface");
return;
}
QPointF position(wl_fixed_to_double(x), wl_fixed_to_double(y));
QSizeF size(wl_fixed_to_double(width), wl_fixed_to_double(height));
QRectF sourceGeometry(position, size);
if (sourceGeometry == QRectF(-1, -1, -1, -1)) {
auto *surfacePrivate = QWaylandSurfacePrivate::get(m_surface);
surfacePrivate->pending.sourceGeometry = QRectF();
return;
}
if (position.x() < 0 || position.y() < 0) {
wl_resource_post_error(resource->handle, error_bad_value,
"negative position in set_source");
return;
}
if (!size.isValid()) {
wl_resource_post_error(resource->handle, error_bad_value,
"negative size in set_source");
return;
}
auto *surfacePrivate = QWaylandSurfacePrivate::get(m_surface);
surfacePrivate->pending.sourceGeometry = sourceGeometry;
}
void QWaylandViewporterPrivate::Viewport::wp_viewport_set_destination(QtWaylandServer::wp_viewport::Resource *resource, int32_t width, int32_t height)
{
Q_UNUSED(resource);
if (!m_surface) {
wl_resource_post_error(resource->handle, error_no_surface,
"set_destination requested for destroyed surface");
return;
}
QSize destinationSize(width, height);
if (!destinationSize.isValid() && destinationSize != QSize(-1, -1)) {
wl_resource_post_error(resource->handle, error_bad_value,
"negative size in set_destination");
return;
}
auto *surfacePrivate = QWaylandSurfacePrivate::get(m_surface);
surfacePrivate->pending.destinationSize = destinationSize;
}
QT_END_NAMESPACE
#include "moc_qwaylandviewporter.cpp"
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