sij/mapnik
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

followup nodata refactor - refs #2023

Browse source
This commit is contained in:
Dane Springmeyer 2013-09-25 14:38:07 -07:00
parent df3a455e19
commit 7aeff3fb59
1 changed files with 7 additions and 13 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

20
src/raster_colorizer.cpp
View file

@ -127,25 +127,19 @@ void raster_colorizer::colorize(raster_ptr const& raster, feature_impl const& f)
unsigned *imageData = raster->data_.getData();
int len = raster->data_.width() * raster->data_.height();
bool hasNoData = false;
float noDataValue = 0;
//std::map<std::string,value>::const_iterator fi = Props.find("NODATA");
if (f.has_key("NODATA"))
{
hasNoData = true;
noDataValue = static_cast<float>(f.get("NODATA").to_double());
}
boost::optional<double> const& nodata = raster->nodata();
for (int i=0; i<len; ++i)
{
// the GDAL plugin reads single bands as floats
float value = *reinterpret_cast<float *> (&imageData[i]);
if (hasNoData && noDataValue == value)
imageData[i] = color(0,0,0,0).rgba();
if (nodata && (std::fabs(value - *nodata) < epsilon_))
{
imageData[i] = 0;
}
else
{
imageData[i] = get_color(value).rgba();
}
}
}