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130 lines
3.5 KiB
C++
130 lines
3.5 KiB
C++
/*
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* Copyright 2018 Michail Vourlakos <mvourlakos@gmail.com>
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*
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* This file is part of Latte-Dock
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*
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* Latte-Dock 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) any later version.
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*
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* Latte-Dock 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 "backgroundcache.h"
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// local
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#include "commontools.h"
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// Qt
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#include <QImage>
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#include <QRgb>
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// Plasma
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#include <Plasma>
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namespace Latte{
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namespace PlasmaExtended {
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BackgroundCache::BackgroundCache(QObject *parent)
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: QObject(parent)
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{
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if (!m_pool) {
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m_pool = new ScreenPool(this);
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}
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}
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BackgroundCache::~BackgroundCache()
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{
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if (m_pool) {
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m_pool->deleteLater();
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}
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}
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BackgroundCache *BackgroundCache::self()
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{
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static BackgroundCache cache;
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return &cache;
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}
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float BackgroundCache::luminasFromFile(QString imageFile, int edge)
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{
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QImage image(imageFile);
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Plasma::Types::Location location = static_cast<Plasma::Types::Location>(edge);
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if (m_luminasCache.keys().contains(imageFile)) {
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if (m_luminasCache[imageFile].keys().contains(location)) {
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return m_luminasCache[imageFile].value(location);
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}
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}
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if (image.format() != QImage::Format_Invalid) {
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int maskHeight = (0.08 * image.height());
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int maskWidth = (0.05 * image.width());
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float areaLumin = -1000;
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int firstRow = 0;
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int firstColumn = 0;
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int endRow = 0;
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int endColumn = 0;
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if (location == Plasma::Types::TopEdge) {
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firstRow = 0;
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endRow = maskHeight;
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firstColumn = 0;
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endColumn = image.width() - 1;
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} else if (location == Plasma::Types::BottomEdge) {
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firstRow = image.height() - maskHeight - 1;
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endRow = image.height() - 1;
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firstColumn = 0;
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endColumn = image.width() - 1;
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} else if (location == Plasma::Types::LeftEdge) {
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firstRow = 0;
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endRow = image.height() - 1;
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firstColumn = 0;
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endColumn = maskWidth;
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} else if (location == Plasma::Types::RightEdge) {
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firstRow = 0;
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endRow = image.height() - 1;
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firstColumn = image.width() - 1 - maskWidth;
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endColumn = image.width() - 1;
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}
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for (int row = firstRow; row < endRow; ++row) {
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QRgb *line = (QRgb *)image.scanLine(row);
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for (int col = firstColumn; col < endColumn ; ++col) {
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QRgb pixelData = line[col];
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float pixelLuminosity = Latte::colorLumina(pixelData);
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areaLumin = (areaLumin == -1000) ? pixelLuminosity : (areaLumin + pixelLuminosity);
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}
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}
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float areaSize = (endRow - firstRow) * (endColumn - firstColumn);
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areaLumin = areaLumin / areaSize;
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if (!m_luminasCache.keys().contains(imageFile)) {
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m_luminasCache[imageFile] = EdgesHash();
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}
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m_luminasCache[imageFile].insert(location, areaLumin);
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return areaLumin;
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}
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//! didn't find anything
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return -1000;
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}
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}
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}
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