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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;
}
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