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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the demonstration applications of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "imageitem.h"
+#include "colors.h"
+
+ImageItem::ImageItem(const QImage &image, int maxWidth, int maxHeight, QGraphicsScene *scene,
+ QGraphicsItem *parent, bool adjustSize, float scale) : DemoItem(scene, parent)
+{
+ this->image = image;
+ this->maxWidth = maxWidth;
+ this->maxHeight = maxHeight;
+ this->adjustSize = adjustSize;
+ this->scale = scale;
+}
+
+QImage *ImageItem::createImage(const QMatrix &matrix) const
+{
+ QImage *original = new QImage(image);
+ if (original->isNull()){
+ return original; // nothing we can do about it...
+ }
+
+ QPoint size = matrix.map(QPoint(this->maxWidth, this->maxHeight));
+ float w = size.x(); // x, y is the used as width, height
+ float h = size.y();
+
+ // Optimization: if image is smaller than maximum allowed size, just return the loaded image
+ if (original->size().height() <= h && original->size().width() <= w && !this->adjustSize && this->scale == 1)
+ return original;
+
+ // Calculate what the size of the final image will be:
+ w = qMin(w, float(original->size().width()) * this->scale);
+ h = qMin(h, float(original->size().height()) * this->scale);
+
+ float adjustx = 1.0f;
+ float adjusty = 1.0f;
+ if (this->adjustSize){
+ adjustx = qMin(matrix.m11(), matrix.m22());
+ adjusty = matrix.m22() < adjustx ? adjustx : matrix.m22();
+ w *= adjustx;
+ h *= adjusty;
+ }
+
+ // Create a new image with correct size, and draw original on it
+ QImage *image = new QImage(int(w+2), int(h+2), QImage::Format_ARGB32_Premultiplied);
+ image->fill(QColor(0, 0, 0, 0).rgba());
+ QPainter painter(image);
+ painter.setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
+ if (this->adjustSize)
+ painter.scale(adjustx, adjusty);
+ if (this->scale != 1)
+ painter.scale(this->scale, this->scale);
+ painter.drawImage(0, 0, *original);
+
+ if (!this->adjustSize){
+ // Blur out edges
+ int blur = 30;
+ if (h < original->height()){
+ QLinearGradient brush1(0, h - blur, 0, h);
+ brush1.setSpread(QGradient::PadSpread);
+ brush1.setColorAt(0.0, QColor(0, 0, 0, 0));
+ brush1.setColorAt(1.0, Colors::sceneBg1);
+ painter.fillRect(0, int(h) - blur, original->width(), int(h), brush1);
+ }
+ if (w < original->width()){
+ QLinearGradient brush2(w - blur, 0, w, 0);
+ brush2.setSpread(QGradient::PadSpread);
+ brush2.setColorAt(0.0, QColor(0, 0, 0, 0));
+ brush2.setColorAt(1.0, Colors::sceneBg1);
+ painter.fillRect(int(w) - blur, 0, int(w), original->height(), brush2);
+ }
+ }
+ delete original;
+ return image;
+}