QImage DistanceMapGenerationTool::ConvertMapToImage(const QSharedPointer<Map>& map,
ccColorScale::Shared colorScale,
unsigned colorScaleSteps/*=ccColorScale::MAX_STEPS*/)
{
if (!map || !colorScale)
return QImage();
//create image
QImage image(QSize(map->xSteps,map->ySteps),QImage::Format_ARGB32);
if (image.isNull())
{
//not enough memory!
return QImage();
}
//convert map cells to pixels
{
bool csIsRelative = colorScale->isRelative();
const MapCell* cell = &map->at(0);
for (unsigned j=0; j<map->ySteps; ++j)
{
//for each column
for (unsigned i=0; i<map->xSteps; ++i, ++cell)
{
const ColorCompType* rgb = ccColor::lightGrey.rgba;
if (cell->count != 0)
{
double relativePos = csIsRelative ? (cell->value - map->minVal) / (map->maxVal - map->minVal) : colorScale->getRelativePosition(cell->value);
if (relativePos < 0.0)
relativePos = 0.0;
else if (relativePos > 1.0)
relativePos = 1.0;
rgb = colorScale->getColorByRelativePos(relativePos,colorScaleSteps,ccColor::lightGrey.rgba);
}
//DGM FIXME: QImage::sePixel is quite slow!
image.setPixel( static_cast<int>(i),
static_cast<int>(j),
qRgb(rgb[0],rgb[1],rgb[2]) );
}
}
}
return image;
}
void ccScalarField::setColorScale(ccColorScale::Shared scale)
{
if (m_colorScale != scale)
{
bool wasAbsolute = (m_colorScale && !m_colorScale->isRelative());
bool isAbsolute = (scale && !scale->isRelative());
m_colorScale = scale;
if (isAbsolute)
m_symmetricalScale = false;
if (isAbsolute || wasAbsolute != isAbsolute)
updateSaturationBounds();
m_modified = true;
}
}