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++ // Copyright (C) 2020 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #include "imageinstancetable.h"
++ #include <math.h>
++ #include <QMatrix4x4>
++ #include <QColor>
++ #include <QImage>
++ #include <QQmlFile>
++
++ ImageInstanceTable::ImageInstanceTable(QQuick3DObject *parent) : QQuick3DInstancing(parent)
++ {
++ }
++
++ ImageInstanceTable::~ImageInstanceTable()
++ {
++ }
++
++ int ImageInstanceTable::gridSize() const
++ {
++ return m_gridSize;
++ }
++
++ float ImageInstanceTable::gridSpacing() const
++ {
++ return m_gridSpacing;
++ }
++
++ QString ImageInstanceTable::image() const
++ {
++ return m_imageSource;
++ }
++
++ void ImageInstanceTable::setGridSize(int gridSize)
++ {
++ if (m_gridSize == gridSize)
++ return;
++
++ m_gridSize = gridSize;
++ emit gridSizeChanged(m_gridSize);
++ markDirty();
++ m_dirty = true;
++ }
++
++ void ImageInstanceTable::setGridSpacing(float gridSpacing)
++ {
++ if (qFuzzyCompare(m_gridSpacing, gridSpacing))
++ return;
++
++ m_gridSpacing = gridSpacing;
++ emit gridSpacingChanged(m_gridSpacing);
++ markDirty();
++ m_dirty = true;
++ }
++
++ void ImageInstanceTable::setImage(QString image)
++ {
++ if (m_imageSource == image)
++ return;
++
++ m_imageSource = image;
++ emit imageChanged(m_imageSource);
++ markDirty();
++ m_dirty = true;
++ }
++
++ QByteArray ImageInstanceTable::getInstanceBuffer(int *instanceCount)
++ {
++ if (m_dirty) {
++ QImage image(m_imageSource);
++ if (image.isNull())
++ qWarning() << "Could not load image" << m_imageSource;
++ m_instanceData.resize(0);
++ image = image.scaledToWidth(m_gridSize, Qt::SmoothTransformation);
++ int instanceNumber = 0;
++ for (int blockX = 0; blockX < image.width(); ++blockX) {
++ float xPos = m_gridSpacing * (blockX - m_gridSize/2);
++ for (int blockY = 0; blockY < image.width(); ++blockY) {
++ QColor color = image.pixel(blockX, blockY);
++ float yPos = -m_gridSpacing * (blockY - m_gridSize/2);
++
++ float zPos = 10 * m_gridSpacing * (color.lightnessF() - 1.0);
++
++ auto entry = calculateTableEntry({xPos,yPos,zPos}, {1.0, 1.0, 1.0}, {0,0,0}, color, {});
++ m_instanceData.append(reinterpret_cast<const char *>(&entry), sizeof(entry));
++ instanceNumber++;
++ }
++ }
++ m_instanceCount = instanceNumber;
++ m_dirty = false;
++ }
++ if (instanceCount)
++ *instanceCount = m_instanceCount;
++
++ return m_instanceData;
++ }