Ok, got the source to build, and I see that it is an inkscape issue, not a libpng one, as inkscape is feeding the zeroed RGB into libpng in the func:
sp_png_write_rgba_striped()
from src/helper/png-write.c
Still trying to find out why inkscape (or is it cairo?) generated those zeroed RGB values.
Debugging inkscape is hampered by the fact that gdb will not show me source code, as the png writer code is dynamically loaded.
Ok, got the source to build, and I see that it is an inkscape issue, not a libpng one, as inkscape is feeding the zeroed RGB into libpng in the func:
sp_png_ write_rgba_ striped( )
from src/helper/ png-write. c
Still trying to find out why inkscape (or is it cairo?) generated those zeroed RGB values.
Debugging inkscape is hampered by the fact that gdb will not show me source code, as the png writer code is dynamically loaded.