Both apps can import PNG files and export to binary or ASCII text (both are directly useable by ie. cross-dev assemblers).
Exporting a C64 BASIC listing (ie. DATA statements) is not supported but you can load a PRG file from basic, which is easily made out of a binary, just add a 2-byte load address to the file using a hex editor, low byte first.
This will give you a lot more flexibility than using hard-coded DATA statements as the data can then be loaded by any program.