pngread does not read 12bit gray images

[John W. Eaton]

On 10-Jul-2008, Bengt-Arne Fjellner wrote:

| I'm working on one to:
| Download and try:
| http://pinus.tt.ltu.se/~baf/pngread.cc
| The test for endianness of the machine should be done during compilation but
| I haven't figured out how.
| 
| And if it seems to work just include it in the distro.

The next release of Octave will include an imread function that will
be able to read png images using the GraphicsMagick library, so I
don't see the need for a separate pngread function.

jwe