278 lines
9.2 KiB
C++
278 lines
9.2 KiB
C++
/*
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* Copyright (c) 2007 Paolo Capriotti <p.capriotti@gmail.com>
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* Copyright (c) 2009 Aaron Seigo <aseigo@kde.org>
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*
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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 Library General Public License as
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* published by the Free Software Foundation; either version 2, or
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* (at your option) any later version.
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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 Library General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "plasma/private/wallpaperrenderthread_p.h"
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#include <QCoreApplication>
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#include <QPainter>
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#include <QFile>
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#include <QSvgRenderer>
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#include "config-plasma.h"
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#if !PLASMA_NO_SOLID
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#include <solid/device.h>
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#include <solid/deviceinterface.h>
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#endif
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#include <kdebug.h>
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namespace Plasma
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{
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int WallpaperRenderRequest::s_token = 0;
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int WallpaperRenderThread::s_rendererCount = 0;
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QQueue<WallpaperRenderRequest> WallpaperRenderThread::s_renderQueue;
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WallpaperRenderThread::WallpaperRenderThread(const WallpaperRenderRequest &request, QObject *parent)
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: QThread(parent),
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m_request(request),
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m_abort(false)
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{
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qRegisterMetaType<WallpaperRenderRequest>("WallpaperRenderRequest");
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if (!request.requester) {
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deleteLater();
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return;
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}
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++s_rendererCount;
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connect(this, SIGNAL(done(WallpaperRenderRequest,QImage)),
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request.requester.data(), SLOT(newRenderCompleted(WallpaperRenderRequest,QImage)));
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}
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WallpaperRenderThread::~WallpaperRenderThread()
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{
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#ifndef NDEBUG
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kDebug() << "rendering done";
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#endif
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m_abort = true;
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wait();
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--s_rendererCount;
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checkQueue();
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}
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void WallpaperRenderThread::render(const WallpaperRenderRequest &request)
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{
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QObject *requester = request.requester.data();
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if (!requester) {
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return;
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}
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// remove all dead requests and requests previously made for the same parent
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QMutableListIterator<WallpaperRenderRequest> it(s_renderQueue);
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while (it.hasNext()) {
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const WallpaperRenderRequest &request = it.next();
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if (!request.requester || request.requester.data() == requester) {
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it.remove();
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}
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}
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s_renderQueue.append(request);
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checkQueue();
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}
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void WallpaperRenderThread::checkQueue()
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{
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if (s_renderQueue.isEmpty()) {
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return;
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}
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if (QCoreApplication::closingDown()) {
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s_renderQueue.clear();
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return;
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}
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#if !PLASMA_NO_SOLID
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const int numProcs = qMax(1, Solid::Device::listFromType(Solid::DeviceInterface::Processor).count());
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#else
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const int numProcs = 1;
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#endif
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#ifndef NDEBUG
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kDebug() << "checking rendering against" << s_rendererCount << numProcs;
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#endif
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if (s_rendererCount < numProcs) {
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WallpaperRenderThread *renderThread = new WallpaperRenderThread(s_renderQueue.dequeue());
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renderThread->start();
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}
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}
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void WallpaperRenderThread::run()
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{
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#ifndef NDEBUG
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kDebug() << "rendering wallpaper" << m_request.file;
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#endif
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QImage result(m_request.size, QImage::Format_ARGB32_Premultiplied);
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result.fill(m_request.color.rgba());
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if (m_request.file.isEmpty() && m_request.providedImage.isNull() && !QFile::exists(m_request.file)) {
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if (!m_abort) {
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emit done(m_request, result);
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}
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#ifndef NDEBUG
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kDebug() << "wrong request or file does not exist";
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#endif
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deleteLater();
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return;
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}
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QPoint pos(0, 0);
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//const float ratio = qMax(float(1), m_request.size.width() / float(m_request.size.height()));
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const bool scalable = m_request.file.endsWith(QLatin1String("svg")) || m_request.file.endsWith(QLatin1String("svgz"));
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bool tiled = false;
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QSize scaledSize;
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QImage img;
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// set image size
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QSize imgSize(1, 1);
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if (!m_request.providedImage.isNull()) {
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img = m_request.providedImage;
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kDebug() << "going to resize the img" << img.size();
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imgSize = imgSize.expandedTo(img.size());
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} else if (scalable) {
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// scalable: image can be of any size
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imgSize = imgSize.expandedTo(m_request.size);
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} else {
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// otherwise, use the natural size of the loaded image
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img = QImage(m_request.file);
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imgSize = imgSize.expandedTo(img.size());
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//kDebug() << "loaded with" << imgSize << ratio;
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}
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// set render parameters according to resize mode
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switch (m_request.resizeMethod)
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{
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case Wallpaper::ScaledResize:
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scaledSize = m_request.size;
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break;
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case Wallpaper::CenteredResize:
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scaledSize = imgSize;
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pos = QPoint((m_request.size.width() - scaledSize.width()) / 2,
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(m_request.size.height() - scaledSize.height()) / 2);
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//If the picture is bigger than the screen, shrink it
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if (m_request.size.width() < imgSize.width() && imgSize.width() > imgSize.height()) {
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int width = m_request.size.width();
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int height = width * scaledSize.height() / imgSize.width();
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scaledSize = QSize(width, height);
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pos = QPoint((m_request.size.width() - scaledSize.width()) / 2,
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(m_request.size.height() - scaledSize.height()) / 2);
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} else if (m_request.size.height() < imgSize.height()) {
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int height = m_request.size.height();
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int width = height * imgSize.width() / imgSize.height();
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scaledSize = QSize(width, height);
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pos = QPoint((m_request.size.width() - scaledSize.width()) / 2,
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(m_request.size.height() - scaledSize.height()) / 2);
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}
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break;
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case Wallpaper::MaxpectResize: {
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float xratio = (float) m_request.size.width() / imgSize.width();
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float yratio = (float) m_request.size.height() / imgSize.height();
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if (xratio > yratio) {
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int height = m_request.size.height();
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int width = height * imgSize.width() / imgSize.height();
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scaledSize = QSize(width, height);
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} else {
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int width = m_request.size.width();
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int height = width * imgSize.height() / imgSize.width();
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scaledSize = QSize(width, height);
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}
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pos = QPoint((m_request.size.width() - scaledSize.width()) / 2,
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(m_request.size.height() - scaledSize.height()) / 2);
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break;
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}
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case Wallpaper::ScaledAndCroppedResize: {
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float xratio = (float) m_request.size.width() / imgSize.width();
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float yratio = (float) m_request.size.height() / imgSize.height();
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if (xratio > yratio) {
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int width = m_request.size.width();
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int height = width * imgSize.height() / imgSize.width();
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scaledSize = QSize(width, height);
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} else {
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int height = m_request.size.height();
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int width = height * imgSize.width() / imgSize.height();
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scaledSize = QSize(width, height);
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}
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pos = QPoint((m_request.size.width() - scaledSize.width()) / 2,
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(m_request.size.height() - scaledSize.height()) / 2);
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break;
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}
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case Wallpaper::TiledResize:
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scaledSize = imgSize;
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tiled = true;
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break;
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case Wallpaper::CenterTiledResize:
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scaledSize = imgSize;
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pos = QPoint(-scaledSize.width() + ((m_request.size.width() - scaledSize.width()) / 2) % scaledSize.width(),
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-scaledSize.height() + ((m_request.size.height() - scaledSize.height()) / 2) % scaledSize.height());
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tiled = true;
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break;
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}
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QPainter p(&result);
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//kDebug() << token << scalable << scaledSize << imgSize;
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if (scalable) {
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// tiling is ignored for scalable wallpapers
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QSvgRenderer svg(m_request.file);
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if (m_abort) {
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deleteLater();
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return;
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}
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svg.render(&p);
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} else {
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if (scaledSize != imgSize) {
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img = img.scaled(scaledSize, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
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}
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if (m_abort) {
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deleteLater();
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return;
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}
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if (tiled) {
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for (int x = pos.x(); x < m_request.size.width(); x += scaledSize.width()) {
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for (int y = pos.y(); y < m_request.size.height(); y += scaledSize.height()) {
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p.drawImage(QPoint(x, y), img);
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if (m_abort) {
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deleteLater();
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return;
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}
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}
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}
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} else {
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p.drawImage(pos, img);
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}
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}
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// signal we're done
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if (!m_abort) {
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emit done(m_request, result);
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}
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deleteLater();
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}
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} // namespace Plasma
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#include "moc_wallpaperrenderthread_p.cpp"
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