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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qoffscreencommon.h"
#include "qoffscreenintegration.h"
#include "qoffscreenwindow.h"
#include <QtGui/QPainter>
#include <QtGui/private/qpixmap_raster_p.h>
#include <QtGui/private/qguiapplication_p.h>
#include <qpa/qplatformcursor.h>
#include <qpa/qplatformwindow.h>
QT_BEGIN_NAMESPACE
QPlatformWindow *QOffscreenScreen::windowContainingCursor = nullptr;
QList<QPlatformScreen *> QOffscreenScreen::virtualSiblings() const
{
QList<QPlatformScreen *> platformScreens;
for (auto screen : m_integration->screens()) {
platformScreens.append(screen);
}
return platformScreens;
}
class QOffscreenCursor : public QPlatformCursor
{
public:
QOffscreenCursor() : m_pos(10, 10) {}
QPoint pos() const override { return m_pos; }
void setPos(const QPoint &pos) override
{
m_pos = pos;
const QWindowList wl = QGuiApplication::topLevelWindows();
QWindow *containing = nullptr;
for (QWindow *w : wl) {
if (w->type() != Qt::Desktop && w->isExposed() && w->geometry().contains(pos)) {
containing = w;
break;
}
}
QPoint local = pos;
if (containing)
local -= containing->position();
QWindow *previous = QOffscreenScreen::windowContainingCursor ? QOffscreenScreen::windowContainingCursor->window() : nullptr;
if (containing != previous)
QWindowSystemInterface::handleEnterLeaveEvent(containing, previous, local, pos);
QWindowSystemInterface::handleMouseEvent(containing, local, pos, QGuiApplication::mouseButtons(), Qt::NoButton,
QEvent::MouseMove, QGuiApplication::keyboardModifiers(), Qt::MouseEventSynthesizedByQt);
QOffscreenScreen::windowContainingCursor = containing ? containing->handle() : nullptr;
}
#ifndef QT_NO_CURSOR
void changeCursor(QCursor *windowCursor, QWindow *window) override
{
Q_UNUSED(windowCursor);
Q_UNUSED(window);
}
#endif
private:
QPoint m_pos;
};
QOffscreenScreen::QOffscreenScreen(const QOffscreenIntegration *integration)
: m_geometry(0, 0, 800, 600)
, m_cursor(new QOffscreenCursor)
, m_integration(integration)
{
}
QPixmap QOffscreenScreen::grabWindow(WId id, int x, int y, int width, int height) const
{
QRect rect(x, y, width, height);
// id == 0 -> grab the screen, so all windows intersecting rect
if (!id) {
if (width == -1)
rect.setWidth(m_geometry.width());
if (height == -1)
rect.setHeight(m_geometry.height());
QPixmap screenImage(rect.size());
QPainter painter(&screenImage);
painter.translate(-x, -y);
const QWindowList wl = QGuiApplication::topLevelWindows();
for (QWindow *w : wl) {
if (w->isExposed() && w->geometry().intersects(rect)) {
QOffscreenBackingStore *store = QOffscreenBackingStore::backingStoreForWinId(w->winId());
const QImage windowImage = store ? store->toImage() : QImage();
if (!windowImage.isNull())
painter.drawImage(w->position(), windowImage);
}
}
return screenImage;
}
QOffscreenBackingStore *store = QOffscreenBackingStore::backingStoreForWinId(id);
if (store)
return store->grabWindow(id, rect);
return QPixmap();
}
QOffscreenBackingStore::QOffscreenBackingStore(QWindow *window)
: QPlatformBackingStore(window)
{
}
QOffscreenBackingStore::~QOffscreenBackingStore()
{
clearHash();
}
QPaintDevice *QOffscreenBackingStore::paintDevice()
{
return &m_image;
}
void QOffscreenBackingStore::flush(QWindow *window, const QRegion ®ion, const QPoint &offset)
{
Q_UNUSED(region);
if (m_image.size().isEmpty())
return;
QSize imageSize = m_image.size();
QRegion clipped = QRect(0, 0, window->width(), window->height());
clipped &= QRect(0, 0, imageSize.width(), imageSize.height()).translated(-offset);
QRect bounds = clipped.boundingRect().translated(offset);
if (bounds.isNull())
return;
WId id = window->winId();
m_windowAreaHash[id] = bounds;
m_backingStoreForWinIdHash[id] = this;
}
void QOffscreenBackingStore::resize(const QSize &size, const QRegion &)
{
QImage::Format format = QGuiApplication::primaryScreen()->handle()->format();
if (m_image.size() != size)
m_image = QImage(size, format);
clearHash();
}
extern void qt_scrollRectInImage(QImage &img, const QRect &rect, const QPoint &offset);
bool QOffscreenBackingStore::scroll(const QRegion &area, int dx, int dy)
{
if (m_image.isNull())
return false;
const QRect rect = area.boundingRect();
qt_scrollRectInImage(m_image, rect, QPoint(dx, dy));
return true;
}
QPixmap QOffscreenBackingStore::grabWindow(WId window, const QRect &rect) const
{
QRect area = m_windowAreaHash.value(window, QRect());
if (area.isNull())
return QPixmap();
QRect adjusted = rect;
if (adjusted.width() <= 0)
adjusted.setWidth(area.width());
if (adjusted.height() <= 0)
adjusted.setHeight(area.height());
adjusted = adjusted.translated(area.topLeft()) & area;
if (adjusted.isEmpty())
return QPixmap();
return QPixmap::fromImage(m_image.copy(adjusted));
}
QOffscreenBackingStore *QOffscreenBackingStore::backingStoreForWinId(WId id)
{
return m_backingStoreForWinIdHash.value(id, nullptr);
}
void QOffscreenBackingStore::clearHash()
{
for (auto it = m_windowAreaHash.cbegin(), end = m_windowAreaHash.cend(); it != end; ++it) {
const auto it2 = std::as_const(m_backingStoreForWinIdHash).find(it.key());
if (it2.value() == this)
m_backingStoreForWinIdHash.erase(it2);
}
m_windowAreaHash.clear();
}
QHash<WId, QOffscreenBackingStore *> QOffscreenBackingStore::m_backingStoreForWinIdHash;
QOffscreenPlatformNativeInterface::QOffscreenPlatformNativeInterface(QOffscreenIntegration *integration)
: m_integration(integration)
{
}
QOffscreenPlatformNativeInterface::~QOffscreenPlatformNativeInterface() = default;
/*
Set platform configuration, e.g. screen configuration
*/
void QOffscreenPlatformNativeInterface::setConfiguration(const QJsonObject &configuration, QOffscreenPlatformNativeInterface *iface)
{
iface->m_integration->setConfiguration(configuration);
}
/*
Get the current platform configuration
*/
QJsonObject QOffscreenPlatformNativeInterface::configuration(QOffscreenPlatformNativeInterface *iface)
{
return iface->m_integration->configuration();
}
void *QOffscreenPlatformNativeInterface::nativeResourceForIntegration(const QByteArray &resource)
{
if (resource == "setConfiguration")
return reinterpret_cast<void*>(&QOffscreenPlatformNativeInterface::setConfiguration);
else if (resource == "configuration")
return reinterpret_cast<void*>(&QOffscreenPlatformNativeInterface::configuration);
else
return nullptr;
}
QT_END_NAMESPACE
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