83 lines
2.4 KiB
C++
83 lines
2.4 KiB
C++
/*
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* Copyright 2005 by Aaron Seigo <aseigo@kde.org>
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* Copyright 2008 by Andrew Lake <jamboarder@yahoo.com>
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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 <imageeffects.h>
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#include "effects/blur.cpp"
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#include <QImage>
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#include <QPainter>
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#include <QPixmap>
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namespace Plasma
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{
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namespace ImageEffects
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{
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void shadowBlur(QImage &image, int radius, const QColor &color)
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{
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if (radius < 1)
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return;
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expblur<16, 7>(image, radius);
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QPainter p(&image);
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p.setCompositionMode(QPainter::CompositionMode_SourceIn);
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p.fillRect(image.rect(), color);
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}
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QPixmap shadowText(QString text, QColor textColor, QColor shadowColor, QPoint offset, int radius)
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{
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// Draw text
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QPixmap pixmap(10,10);
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QPainter p(&pixmap);
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QRect textRect = p.fontMetrics().boundingRect(text);
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p.end();
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QPixmap textPixmap(textRect.size());
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textPixmap.fill(Qt::transparent);
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p.begin(&textPixmap);
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p.setPen(textColor);
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p.drawText(textPixmap.rect(), Qt::AlignLeft, text);
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p.end();
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//Draw blurred shadow
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QImage img(textRect.size() + QSize(radius * 2, radius * 2),
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QImage::Format_ARGB32_Premultiplied);
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img.fill(Qt::transparent);
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p.begin(&img);
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p.drawImage(QPoint(0,0), textPixmap.toImage());
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p.end();
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shadowBlur(img, radius, shadowColor);
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//Compose text and shadow
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QPixmap finalPixmap(img.size() + QSize(offset.x(), offset.y()));
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finalPixmap.fill(Qt::transparent);
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p.begin(&finalPixmap);
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p.drawImage(finalPixmap.rect().topLeft() + QPoint(offset.x(), offset.y()), img);
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p.drawPixmap(finalPixmap.rect().topLeft(), textPixmap);
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p.end();
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return finalPixmap;
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}
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} //ImageEffects namespace
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} // Plasma namespace
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