130 lines
4.5 KiB
C++
130 lines
4.5 KiB
C++
/*
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* Copyright 2016 Martin Gräßlin <mgraesslin@kde.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License or (at your option) version 3 or any later version
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* accepted by the membership of KDE e.V. (or its successor approved
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* by the membership of KDE e.V.), which shall act as a proxy
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* defined in Section 14 of version 3 of the license.
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*
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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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*
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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 "../xcbutils.h"
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#include <QApplication>
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#include <QDebug>
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#include <QCommandLineParser>
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#include <QLabel>
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#include <QFormLayout>
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#include <QVBoxLayout>
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#include <QWidget>
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#include <QX11Info>
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static QVector<uint32_t> readShadow(quint32 windowId)
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{
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KWin::Xcb::Atom atom(QByteArrayLiteral("_KDE_NET_WM_SHADOW"), false, QX11Info::connection());
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QVector<uint32_t> ret;
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if (windowId != XCB_WINDOW) {
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KWin::Xcb::Property property(false, windowId, atom, XCB_ATOM_CARDINAL, 0, 12);
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uint32_t *shadow = property.value<uint32_t*>();
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if (shadow) {
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ret.reserve(12);
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for (int i=0; i<12; ++i) {
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ret << shadow[i];
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}
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} else {
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qDebug() << "!!!! no shadow";
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}
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} else {
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qDebug() << "!!!! no window";
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}
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return ret;
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}
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static QVector<QPixmap> getPixmaps(const QVector<uint32_t> &data)
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{
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QVector<QPixmap> ret;
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static const int ShadowElementsCount = 8;
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QVector<KWin::Xcb::WindowGeometry> pixmapGeometries(ShadowElementsCount);
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QVector<xcb_get_image_cookie_t> getImageCookies(ShadowElementsCount);
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auto *c = KWin::connection();
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for (int i = 0; i < ShadowElementsCount; ++i) {
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pixmapGeometries[i] = KWin::Xcb::WindowGeometry(data[i]);
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}
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auto discardReplies = [&getImageCookies](int start) {
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for (int i = start; i < getImageCookies.size(); ++i) {
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xcb_discard_reply(KWin::connection(), getImageCookies.at(i).sequence);
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}
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};
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for (int i = 0; i < ShadowElementsCount; ++i) {
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auto &geo = pixmapGeometries[i];
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if (geo.isNull()) {
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discardReplies(0);
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return QVector<QPixmap>();
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}
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getImageCookies[i] = xcb_get_image_unchecked(c, XCB_IMAGE_FORMAT_Z_PIXMAP, data[i],
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0, 0, geo->width, geo->height, ~0);
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}
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for (int i = 0; i < ShadowElementsCount; ++i) {
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auto *reply = xcb_get_image_reply(c, getImageCookies.at(i), nullptr);
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if (!reply) {
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discardReplies(i+1);
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return QVector<QPixmap>();
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}
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auto &geo = pixmapGeometries[i];
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QImage image(xcb_get_image_data(reply), geo->width, geo->height, QImage::Format_ARGB32);
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ret << QPixmap::fromImage(image);
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free(reply);
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}
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return ret;
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}
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int main(int argc, char **argv)
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{
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qputenv("QT_QPA_PLATFORM", "xcb");
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QApplication app(argc, argv);
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app.setProperty("x11Connection", QVariant::fromValue<void*>(QX11Info::connection()));
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QCommandLineParser parser;
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parser.addPositionalArgument(QStringLiteral("windowId"), QStringLiteral("The X11 windowId from which to read the shadow"));
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parser.addHelpOption();
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parser.process(app);
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if (parser.positionalArguments().count() != 1) {
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parser.showHelp(1);
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}
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bool ok = false;
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const auto shadow = readShadow(parser.positionalArguments().first().toULongLong(&ok, 16));
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if (!ok) {
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qDebug() << "!!! Failed to read window id";
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return 1;
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}
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if (shadow.isEmpty()) {
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qDebug() << "!!!! Read shadow failed";
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return 1;
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}
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const auto pixmaps = getPixmaps(shadow);
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if (pixmaps.isEmpty()) {
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qDebug() << "!!!! Read pixmap failed";
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return 1;
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}
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QScopedPointer<QWidget> widget(new QWidget());
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QFormLayout *layout = new QFormLayout(widget.data());
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for (const auto &pix : pixmaps) {
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QLabel *l = new QLabel(widget.data());
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l->setPixmap(pix);
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layout->addRow(QStringLiteral("%1x%2:").arg(pix.width()).arg(pix.height()), l);
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}
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widget->setLayout(layout);
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widget->show();
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return app.exec();
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}
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