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79 lines
2.1 KiB
79 lines
2.1 KiB
15 years ago
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/*
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* This file is part of the KDE libraries
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* Copyright (c) 2001 Michael Goffioul <kdeprint@swing.be>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License version 2 as published by the Free Software Foundation.
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*
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* This library 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 GNU
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* Library 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 License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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**/
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#include "imagepreview.h"
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#include <qpainter.h>
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#include <qpixmap.h>
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#include <qpaintdevice.h>
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// forward definition
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QImage convertImage(const QImage& image, int hue, int saturation, int brightness, int gamma);
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ImagePreview::ImagePreview(QWidget *parent, const char *name ) : QWidget(parent,name) {
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brightness_ = 100;
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hue_ = 0;
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saturation_ = 100;
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gamma_ = 1000;
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bw_ = false;
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setBackgroundMode(NoBackground);
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}
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ImagePreview::~ImagePreview(){
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}
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void ImagePreview::setImage(const QImage& image){
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image_ = image.convertDepth(32);
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image_.detach();
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resize(image_.size());
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update();
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}
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void ImagePreview::setParameters(int brightness, int hue, int saturation, int gamma){
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brightness_ = brightness;
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hue_ = hue;
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saturation_ = saturation;
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gamma_ = gamma;
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repaint();
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}
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void ImagePreview::paintEvent(QPaintEvent*){
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QImage tmpImage = convertImage(image_,hue_,(bw_ ? 0 : saturation_),brightness_,gamma_);
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int x = (width()-tmpImage.width())/2, y = (height()-tmpImage.height())/2;
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QPixmap buffer(width(), height());
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buffer.fill(parentWidget(), 0, 0);
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QPainter p(&buffer);
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p.drawImage(x,y,tmpImage);
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p.end();
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bitBlt(this, QPoint(0, 0), &buffer, buffer.rect(), Qt::CopyROP);
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}
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void ImagePreview::setBlackAndWhite(bool on){
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bw_ = on;
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update();
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}
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QSize ImagePreview::minimumSizeHint() const
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{
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return image_.size();
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}
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