121 lines
3.6 KiB
C++
121 lines
3.6 KiB
C++
/*
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KWin - the KDE window manager
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This file is part of the KDE project.
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SPDX-FileCopyrightText: 2016 Martin Gräßlin <mgraesslin@kde.org>
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SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "colorpicker.h"
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#include <kwinglutils.h>
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#include <kwinglutils_funcs.h>
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#include <QDBusConnection>
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#include <KLocalizedString>
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#include <QDBusMetaType>
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Q_DECLARE_METATYPE(QColor)
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QDBusArgument &operator<< (QDBusArgument &argument, const QColor &color)
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{
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argument.beginStructure();
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argument << color.rgba();
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argument.endStructure();
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return argument;
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}
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const QDBusArgument &operator>>(const QDBusArgument &argument, QColor &color)
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{
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argument.beginStructure();
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QRgb rgba;
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argument >> rgba;
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argument.endStructure();
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color = QColor::fromRgba(rgba);
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return argument;
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}
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namespace KWin
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{
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bool ColorPickerEffect::supported()
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{
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return effects->isOpenGLCompositing();
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}
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ColorPickerEffect::ColorPickerEffect()
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: m_scheduledPosition(QPoint(-1, -1))
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{
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qDBusRegisterMetaType<QColor>();
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QDBusConnection::sessionBus().registerObject(QStringLiteral("/ColorPicker"), this, QDBusConnection::ExportScriptableContents);
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}
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ColorPickerEffect::~ColorPickerEffect() = default;
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void ColorPickerEffect::paintScreen(int mask, const QRegion ®ion, ScreenPaintData &data)
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{
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m_cachedOutputGeometry = data.outputGeometry();
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effects->paintScreen(mask, region, data);
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}
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void ColorPickerEffect::postPaintScreen()
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{
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effects->postPaintScreen();
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if (m_scheduledPosition != QPoint(-1, -1) && (m_cachedOutputGeometry.isEmpty() || m_cachedOutputGeometry.contains(m_scheduledPosition))) {
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uint8_t data[3];
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const QRect geo = GLRenderTarget::virtualScreenGeometry();
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const QPoint screenPosition(m_scheduledPosition.x() - geo.x(), m_scheduledPosition.y() - geo.y());
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const QPoint texturePosition(screenPosition.x() * GLRenderTarget::virtualScreenScale(), (geo.height() - screenPosition.y()) * GLRenderTarget::virtualScreenScale());
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glReadnPixels(texturePosition.x(), texturePosition.y(), 1, 1, GL_RGB, GL_UNSIGNED_BYTE, 3, data);
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QDBusConnection::sessionBus().send(m_replyMessage.createReply(QColor(data[0], data[1], data[2])));
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m_picking = false;
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m_scheduledPosition = QPoint(-1, -1);
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}
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}
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QColor ColorPickerEffect::pick()
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{
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if (!calledFromDBus()) {
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return QColor();
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}
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if (m_picking) {
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sendErrorReply(QDBusError::Failed, "Color picking is already in progress");
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return QColor();
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}
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m_picking = true;
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m_replyMessage = message();
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setDelayedReply(true);
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showInfoMessage();
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effects->startInteractivePositionSelection(
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[this] (const QPoint &p) {
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hideInfoMessage();
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if (p == QPoint(-1, -1)) {
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// error condition
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QDBusConnection::sessionBus().send(m_replyMessage.createErrorReply(QStringLiteral("org.kde.kwin.ColorPicker.Error.Cancelled"), "Color picking got cancelled"));
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m_picking = false;
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} else {
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m_scheduledPosition = p;
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effects->addRepaintFull();
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}
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}
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);
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return QColor();
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}
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void ColorPickerEffect::showInfoMessage()
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{
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effects->showOnScreenMessage(i18n("Select a position for color picking with left click or enter.\nEscape or right click to cancel."), QStringLiteral("color-picker"));
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}
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void ColorPickerEffect::hideInfoMessage()
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{
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effects->hideOnScreenMessage();
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}
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bool ColorPickerEffect::isActive() const
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{
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return m_picking && ((m_scheduledPosition != QPoint(-1, -1))) && !effects->isScreenLocked();
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}
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} // namespace
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