Alessandro Bonazzi
8c43d5cf2f
Files correlati : cg0.exe cg0700a.msk cg0700b.msk cg3.exe cg4.exe Bug : Commento: Merge 1.0 libraries
115 lines
4.6 KiB
C++
115 lines
4.6 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the demonstration applications of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see http://www.qt.io/terms-conditions. For further
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** information use the contact form at http://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** As a special exception, The Qt Company gives you certain additional
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** rights. These rights are described in The Qt Company LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "imageitem.h"
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#include "colors.h"
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ImageItem::ImageItem(const QImage &image, int maxWidth, int maxHeight, QGraphicsScene *scene,
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QGraphicsItem *parent, bool adjustSize, float scale) : DemoItem(scene, parent)
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{
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this->image = image;
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this->maxWidth = maxWidth;
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this->maxHeight = maxHeight;
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this->adjustSize = adjustSize;
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this->scale = scale;
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}
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QImage *ImageItem::createImage(const QMatrix &matrix) const
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{
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QImage *original = new QImage(image);
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if (original->isNull()){
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return original; // nothing we can do about it...
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}
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QPoint size = matrix.map(QPoint(this->maxWidth, this->maxHeight));
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float w = size.x(); // x, y is the used as width, height
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float h = size.y();
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// Optimization: if image is smaller than maximum allowed size, just return the loaded image
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if (original->size().height() <= h && original->size().width() <= w && !this->adjustSize && this->scale == 1)
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return original;
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// Calculate what the size of the final image will be:
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w = qMin(w, float(original->size().width()) * this->scale);
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h = qMin(h, float(original->size().height()) * this->scale);
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float adjustx = 1.0f;
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float adjusty = 1.0f;
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if (this->adjustSize){
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adjustx = qMin(matrix.m11(), matrix.m22());
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adjusty = matrix.m22() < adjustx ? adjustx : matrix.m22();
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w *= adjustx;
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h *= adjusty;
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}
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// Create a new image with correct size, and draw original on it
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QImage *image = new QImage(int(w+2), int(h+2), QImage::Format_ARGB32_Premultiplied);
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image->fill(QColor(0, 0, 0, 0).rgba());
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QPainter painter(image);
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painter.setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
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if (this->adjustSize)
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painter.scale(adjustx, adjusty);
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if (this->scale != 1)
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painter.scale(this->scale, this->scale);
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painter.drawImage(0, 0, *original);
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if (!this->adjustSize){
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// Blur out edges
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int blur = 30;
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if (h < original->height()){
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QLinearGradient brush1(0, h - blur, 0, h);
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brush1.setSpread(QGradient::PadSpread);
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brush1.setColorAt(0.0, QColor(0, 0, 0, 0));
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brush1.setColorAt(1.0, Colors::sceneBg1);
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painter.fillRect(0, int(h) - blur, original->width(), int(h), brush1);
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}
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if (w < original->width()){
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QLinearGradient brush2(w - blur, 0, w, 0);
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brush2.setSpread(QGradient::PadSpread);
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brush2.setColorAt(0.0, QColor(0, 0, 0, 0));
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brush2.setColorAt(1.0, Colors::sceneBg1);
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painter.fillRect(int(w) - blur, 0, int(w), original->height(), brush2);
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}
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}
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delete original;
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return image;
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}
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