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* Copyright (C) 2013-2014 Canonical Ltd
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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 General Public License version 3 as
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* published by the Free Software Foundation.
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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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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "photo-edit-thread.h"
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#include "photo-data.h"
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#include "photo-metadata.h"
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* \brief PhotoEditThread::PhotoEditThread
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PhotoEditThread::PhotoEditThread(PhotoData *photo, const PhotoEditCommand &command)
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* \brief PhotoEditThread::command resturns the editing command used for this processing
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const PhotoEditCommand &PhotoEditThread::command() const
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* \brief PhotoEditThread::run \reimp
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void PhotoEditThread::run()
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// The only operation in which we don't have to work on the actual image
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// pixels is image rotation in the case where we can simply change the
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// metadata rotation field.
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if (m_command.type == EDIT_ROTATE && m_photo->fileFormatHasOrientation()) {
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handleSimpleMetadataRotation(m_command);
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// In all other cases we load the image, do the work, and save it back.
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QImage image(m_photo->file().filePath(), m_photo->fileFormat().toStdString().c_str());
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qWarning() << "Error loading" << m_photo->file().filePath() << "for editing";
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// Copy all metadata from the original image so that we can save it to the
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// new one after modifying the pixels.
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PhotoMetadata* original = PhotoMetadata::fromFile(m_photo->file());
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// If the photo was previously rotated through metadata and we are editing
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// the actual pixels, first rotate the image to match the orientation so
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// that the correct pixels are edited.
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// Obviously don't do this in the case we have been asked to do a rotation
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// operation on the pixels, as we would do it later as the operation itself.
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if (m_photo->fileFormatHasOrientation() && m_command.type != EDIT_ROTATE) {
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Orientation orientation = m_photo->orientation();
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QTransform transform = OrientationCorrection::fromOrientation(orientation).toTransform();
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image = image.transformed(transform);
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if (m_command.type == EDIT_ROTATE) {
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QTransform transform = OrientationCorrection::fromOrientation(m_command.orientation).toTransform();
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image = image.transformed(transform);
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} else if (m_command.type == EDIT_CROP) {
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rect.setX(qBound(0.0, m_command.crop_rectangle.x(), 1.0) * image.width());
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rect.setY(qBound(0.0, m_command.crop_rectangle.y(), 1.0) * image.height());
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rect.setWidth(qBound(0.0, m_command.crop_rectangle.width(), 1.0) * image.width());
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rect.setHeight(qBound(0.0, m_command.crop_rectangle.height(), 1.0) * image.height());
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image = image.copy(rect);
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} else if (m_command.type == EDIT_ENHANCE) {
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image = enhanceImage(image);
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} else if (m_command.type == EDIT_COMPENSATE_EXPOSURE) {
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image = compensateExposure(image, m_command.exposureCompensation);
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qWarning() << "Edit thread running with unknown or no operation.";
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bool saved = image.save(m_photo->file().filePath(),
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m_photo->fileFormat().toStdString().c_str(), 90);
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qWarning() << "Error saving edited" << m_photo->file().filePath();
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PhotoMetadata* copy = PhotoMetadata::fromFile(m_photo->file());
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original->copyTo(copy);
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copy->setOrientation(TOP_LEFT_ORIGIN); // reset previous orientation
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copy->updateThumbnail(image);
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* \brief PhotoEditThread::handleSimpleMetadataRotation
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* Handler for the case of an image whose only change is to its
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* orientation; used to skip re-encoding of JPEGs.
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void PhotoEditThread::handleSimpleMetadataRotation(const PhotoEditCommand& state)
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PhotoMetadata* metadata = PhotoMetadata::fromFile(m_photo->file());
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metadata->setOrientation(state.orientation);
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* \brief PhotoEditThread::enhanceImage
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QImage PhotoEditThread::enhanceImage(const QImage& image)
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int width = image.width();
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int height = image.height();
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QImage sample_img = (image.width() > 400) ? image.scaledToWidth(400) : image;
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AutoEnhanceTransformation enhance = AutoEnhanceTransformation(sample_img);
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QImage::Format dest_format = image.format();
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// Can't write into indexed images, due to a limitation in Qt.
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if (dest_format == QImage::Format_Indexed8)
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dest_format = QImage::Format_RGB32;
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QImage enhanced_image(width, height, dest_format);
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for (int j = 0; j < height; j++) {
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for (int i = 0; i < width; i++) {
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QColor px = enhance.transformPixel(
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QColor(image.pixel(i, j)));
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enhanced_image.setPixel(i, j, px.rgb());
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return enhanced_image;
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* \brief PhotoEditThread::compensateExposure Compensates the exposure
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* Compensating the exposure is a change in brightnes
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* \param image Image to change the brightnes
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* \param compansation -1.0 is total dark, +1.0 is total bright
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* \return The image with adjusted brightnes
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QImage PhotoEditThread::compensateExposure(const QImage &image, qreal compensation)
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int shift = qBound(-255, (int)(255*compensation), 255);
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QImage result(image.width(), image.height(), image.format());
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for (int j = 0; j < image.height(); j++) {
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for (int i = 0; i <image.width(); i++) {
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QColor px = image.pixel(i, j);
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int red = qBound(0, px.red() + shift, 255);
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int green = qBound(0, px.green() + shift, 255);
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int blue = qBound(0, px.blue() + shift, 255);
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result.setPixel(i, j, qRgb(red, green, blue));
added
removed
modules/Ubuntu/Components/Extras/plugin/photoeditor/photo-edit-thread.cpp
