2014-07-22 15:11:19 +04:00
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/********************************************************************
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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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2014-07-23 11:20:28 +04:00
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#include "deleted.h"
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2014-07-22 15:11:19 +04:00
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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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2014-07-23 11:20:28 +04:00
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Q_ASSERT(m_client);
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2014-07-22 15:11:19 +04:00
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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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2014-11-11 11:39:45 +03:00
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client()->decoration()->paint(&p, geo);
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2014-07-22 15:11:19 +04:00
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return image;
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}
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2014-07-23 11:20:28 +04:00
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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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2014-07-22 15:11:19 +04:00
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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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2014-08-11 13:41:08 +04:00
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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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2014-07-22 15:11:19 +04:00
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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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2014-07-25 14:55:28 +04:00
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client()->client()->layoutDecorationRects(left, top, right, bottom);
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2014-07-22 15:11:19 +04:00
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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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