id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
3208	PNG transparency of color 0 not working	jake	jake	"The NoDataValue is not interpreted as a transparent color value when it is set to 0 in the PNGCreateCopy function. This applies to both gray scale and RGB images but not images with a palette.

If the image is of type RGB and the MetaItem NODATA_VALUES is set to ""0 0 0"" the transparency value is correctly written to the PNG but not if GDALRasterBand::SetNoDataValue function is used set the nodata value to 0 for the bands.
 
If the image is of gray scale type the NODATA_VALUES is not used at all and GDALRasterBand::SetNoDataValue does not work if the nodata value is 0."	defect	closed	normal	1.7.0	GDAL_Raster	svn-trunk	minor	fixed	png transparency nodata