unsigned int not supported as image and buffer

[tharindu-mathew]

It seems only 8 bit buffers are supported. But, 16 bit needs unsigned ints or similar, if the 16 bit is already available to the user, who doesn't want to downsample it to 8bit.

[lvandeve]

16-bit color is indeed available, for RGB, RGBA, greyscale and greyscale+alpha. It stores them in an 8-bit unsigned chars buffer, but using 2 unsigned chars per pixel

For example if you have 16-bit RGB, it will use 6 bytes per pixel.

The values are in big endian order, just like they are inside the PNG file format

Please check out the code snippet in the comment in #74 to see a working example (greyscale in that case)

Please feel free to reopen this bug if you have any further questions about this :)