24c9194f4c
Summary: glReadPixels needs the correct location relative to the framebuffer so we need to factor in the scale as well as translation when going from compositor space. Test Plan: Ran the plasma colour picker plasmoid in windowed mode Clicked on multiple parts of a window It was right every time Reviewers: #plasma Subscribers: plasma-devel, kwin, #kwin Tags: #kwin Differential Revision: https://phabricator.kde.org/D4950
131 lines
4.2 KiB
C++
131 lines
4.2 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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Copyright (C) 2016 Martin Gräßlin <mgraesslin@kde.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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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, QRegion region, 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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