diff options
Diffstat (limited to 'examples/widgets/painting/imagecomposition/imagecomposer.cpp')
| -rw-r--r-- | examples/widgets/painting/imagecomposition/imagecomposer.cpp | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/examples/widgets/painting/imagecomposition/imagecomposer.cpp b/examples/widgets/painting/imagecomposition/imagecomposer.cpp new file mode 100644 index 0000000000..38b04a27b0 --- /dev/null +++ b/examples/widgets/painting/imagecomposition/imagecomposer.cpp @@ -0,0 +1,211 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtWidgets> + +#include "imagecomposer.h" + +//! [0] +static const QSize resultSize(200, 200); +//! [0] + +//! [1] +ImageComposer::ImageComposer() +{ + sourceButton = new QToolButton; + sourceButton->setIconSize(resultSize); + + operatorComboBox = new QComboBox; + addOp(QPainter::CompositionMode_SourceOver, tr("SourceOver")); + addOp(QPainter::CompositionMode_DestinationOver, tr("DestinationOver")); + addOp(QPainter::CompositionMode_Clear, tr("Clear")); + addOp(QPainter::CompositionMode_Source, tr("Source")); + addOp(QPainter::CompositionMode_Destination, tr("Destination")); + addOp(QPainter::CompositionMode_SourceIn, tr("SourceIn")); + addOp(QPainter::CompositionMode_DestinationIn, tr("DestinationIn")); + addOp(QPainter::CompositionMode_SourceOut, tr("SourceOut")); + addOp(QPainter::CompositionMode_DestinationOut, tr("DestinationOut")); + addOp(QPainter::CompositionMode_SourceAtop, tr("SourceAtop")); + addOp(QPainter::CompositionMode_DestinationAtop, tr("DestinationAtop")); + addOp(QPainter::CompositionMode_Xor, tr("Xor")); + addOp(QPainter::CompositionMode_Plus, tr("Plus")); + addOp(QPainter::CompositionMode_Multiply, tr("Multiply")); + addOp(QPainter::CompositionMode_Screen, tr("Screen")); + addOp(QPainter::CompositionMode_Overlay, tr("Overlay")); + addOp(QPainter::CompositionMode_Darken, tr("Darken")); + addOp(QPainter::CompositionMode_Lighten, tr("Lighten")); + addOp(QPainter::CompositionMode_ColorDodge, tr("ColorDodge")); + addOp(QPainter::CompositionMode_ColorBurn, tr("ColorBurn")); + addOp(QPainter::CompositionMode_HardLight, tr("HardLight")); + addOp(QPainter::CompositionMode_SoftLight, tr("SoftLight")); + addOp(QPainter::CompositionMode_Difference, tr("Difference")); + addOp(QPainter::CompositionMode_Exclusion, tr("Exclusion")); +//! [1] + +//! [2] + destinationButton = new QToolButton; + destinationButton->setIconSize(resultSize); + + equalLabel = new QLabel(tr("=")); + + resultLabel = new QLabel; + resultLabel->setMinimumWidth(resultSize.width()); +//! [2] + +//! [3] + connect(sourceButton, SIGNAL(clicked()), this, SLOT(chooseSource())); + connect(operatorComboBox, SIGNAL(activated(int)), + this, SLOT(recalculateResult())); + connect(destinationButton, SIGNAL(clicked()), + this, SLOT(chooseDestination())); +//! [3] + +//! [4] + QGridLayout *mainLayout = new QGridLayout; + mainLayout->addWidget(sourceButton, 0, 0, 3, 1); + mainLayout->addWidget(operatorComboBox, 1, 1); + mainLayout->addWidget(destinationButton, 0, 2, 3, 1); + mainLayout->addWidget(equalLabel, 1, 3); + mainLayout->addWidget(resultLabel, 0, 4, 3, 1); + mainLayout->setSizeConstraint(QLayout::SetFixedSize); + setLayout(mainLayout); +//! [4] + +//! [5] + resultImage = QImage(resultSize, QImage::Format_ARGB32_Premultiplied); + + loadImage(":/images/butterfly.png", &sourceImage, sourceButton); + loadImage(":/images/checker.png", &destinationImage, destinationButton); + + setWindowTitle(tr("Image Composition")); +} +//! [5] + +//! [6] +void ImageComposer::chooseSource() +{ + chooseImage(tr("Choose Source Image"), &sourceImage, sourceButton); +} +//! [6] + +//! [7] +void ImageComposer::chooseDestination() +{ + chooseImage(tr("Choose Destination Image"), &destinationImage, + destinationButton); +} +//! [7] + +//! [8] +void ImageComposer::recalculateResult() +{ + QPainter::CompositionMode mode = currentMode(); + + QPainter painter(&resultImage); + painter.setCompositionMode(QPainter::CompositionMode_Source); + painter.fillRect(resultImage.rect(), Qt::transparent); + painter.setCompositionMode(QPainter::CompositionMode_SourceOver); + painter.drawImage(0, 0, destinationImage); + painter.setCompositionMode(mode); + painter.drawImage(0, 0, sourceImage); + painter.setCompositionMode(QPainter::CompositionMode_DestinationOver); + painter.fillRect(resultImage.rect(), Qt::white); + painter.end(); + + resultLabel->setPixmap(QPixmap::fromImage(resultImage)); +} +//! [8] + +//! [9] +void ImageComposer::addOp(QPainter::CompositionMode mode, const QString &name) +{ + operatorComboBox->addItem(name, mode); +} +//! [9] + +//! [10] +void ImageComposer::chooseImage(const QString &title, QImage *image, + QToolButton *button) +{ + QString fileName = QFileDialog::getOpenFileName(this, title); + if (!fileName.isEmpty()) + loadImage(fileName, image, button); +} +//! [10] + +//! [11] +void ImageComposer::loadImage(const QString &fileName, QImage *image, + QToolButton *button) +{ + image->load(fileName); + + // Scale the image to given size + *image = image->scaled(resultSize, Qt::KeepAspectRatio); + + QImage fixedImage(resultSize, QImage::Format_ARGB32_Premultiplied); + QPainter painter(&fixedImage); + painter.setCompositionMode(QPainter::CompositionMode_Source); + painter.fillRect(fixedImage.rect(), Qt::transparent); + painter.setCompositionMode(QPainter::CompositionMode_SourceOver); + painter.drawImage(imagePos(*image), *image); + painter.end(); + button->setIcon(QPixmap::fromImage(fixedImage)); + + *image = fixedImage; + + recalculateResult(); +} +//! [11] + +//! [12] +QPainter::CompositionMode ImageComposer::currentMode() const +{ + return (QPainter::CompositionMode) + operatorComboBox->itemData(operatorComboBox->currentIndex()).toInt(); +} +//! [12] + +//! [13] +QPoint ImageComposer::imagePos(const QImage &image) const +{ + return QPoint((resultSize.width() - image.width()) / 2, + (resultSize.height() - image.height()) / 2); +} +//! [13] |