b22317458c
Required to stop and disconnect the timer. Otherwise it's possible that the render is invoked after the Client got destroyed. This happened for example with e.g. opening Kickoff.
152 lines
4.5 KiB
C++
152 lines
4.5 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) 2014 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 "decorationrenderer.h"
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#include "decoratedclient.h"
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#include "client.h"
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#include "deleted.h"
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#include <kwinglobals.h>
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#include <KDecoration2/Decoration>
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#include <KDecoration2/DecoratedClient>
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#include <QDebug>
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#include <QPainter>
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#include <QTimer>
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namespace KWin
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{
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namespace Decoration
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{
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Renderer::Renderer(DecoratedClientImpl *client)
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: QObject(client)
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, m_client(client)
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, m_imageSizesDirty(true)
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{
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auto markImageSizesDirty = [this]{ m_imageSizesDirty = true; };
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connect(client->decoration(), &KDecoration2::Decoration::bordersChanged, this, markImageSizesDirty);
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connect(client->decoratedClient(), &KDecoration2::DecoratedClient::widthChanged, this, markImageSizesDirty);
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connect(client->decoratedClient(), &KDecoration2::DecoratedClient::heightChanged, this, markImageSizesDirty);
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}
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Renderer::~Renderer() = default;
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void Renderer::schedule(const QRect &rect)
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{
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m_scheduled = m_scheduled.united(rect);
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emit renderScheduled(rect);
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}
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QRegion Renderer::getScheduled()
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{
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QRegion region = m_scheduled;
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m_scheduled = QRegion();
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return region;
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}
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QImage Renderer::renderToImage(const QRect &geo)
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{
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Q_ASSERT(m_client);
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QImage image(geo.width(), geo.height(), QImage::Format_ARGB32_Premultiplied);
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image.fill(Qt::transparent);
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QPainter p(&image);
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p.setRenderHint(QPainter::Antialiasing);
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p.setWindow(geo);
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p.setClipRect(geo);
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client()->decoration()->paint(&p);
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return image;
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}
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void Renderer::reparent(Deleted *deleted)
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{
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setParent(deleted);
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m_client = nullptr;
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}
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X11Renderer::X11Renderer(DecoratedClientImpl *client)
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: Renderer(client)
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, m_scheduleTimer(new QTimer(this))
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, m_gc(XCB_NONE)
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{
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// delay any rendering to end of event cycle to catch multiple updates per cycle
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m_scheduleTimer->setSingleShot(true);
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m_scheduleTimer->setInterval(0);
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connect(m_scheduleTimer, &QTimer::timeout, this, &X11Renderer::render);
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connect(this, &Renderer::renderScheduled, m_scheduleTimer, static_cast<void (QTimer::*)()>(&QTimer::start));
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}
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X11Renderer::~X11Renderer()
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{
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if (m_gc != XCB_NONE) {
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xcb_free_gc(connection(), m_gc);
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}
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}
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void X11Renderer::reparent(Deleted *deleted)
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{
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if (m_scheduleTimer->isActive()) {
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m_scheduleTimer->stop();
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disconnect(m_scheduleTimer, &QTimer::timeout, this, &X11Renderer::render);
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disconnect(this, &Renderer::renderScheduled, m_scheduleTimer, static_cast<void (QTimer::*)()>(&QTimer::start));
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}
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Renderer::reparent(deleted);
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}
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void X11Renderer::render()
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{
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const QRegion scheduled = getScheduled();
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if (scheduled.isEmpty()) {
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return;
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}
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xcb_connection_t *c = connection();
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if (m_gc == XCB_NONE) {
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m_gc = xcb_generate_id(c);
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xcb_create_gc(c, m_gc, client()->client()->frameId(), 0, nullptr);
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}
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QRect left, top, right, bottom;
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client()->client()->layoutDecorationRects(left, top, right, bottom);
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const QRect geometry = scheduled.boundingRect();
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left = left.intersected(geometry);
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top = top.intersected(geometry);
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right = right.intersected(geometry);
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bottom = bottom.intersected(geometry);
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auto renderPart = [this, c](const QRect &geo) {
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if (geo.isNull()) {
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return;
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}
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QImage image = renderToImage(geo);
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xcb_put_image(c, XCB_IMAGE_FORMAT_Z_PIXMAP, client()->client()->frameId(), m_gc,
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image.width(), image.height(), geo.x(), geo.y(), 0, 24, image.byteCount(), image.constBits());
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};
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renderPart(left);
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renderPart(top);
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renderPart(right);
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renderPart(bottom);
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xcb_flush(c);
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resetImageSizesDirty();
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}
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}
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}
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