Naïve PNG
I just found out that nimPNG exists, it is quite complete from I can tell, and
it also has a nim-based version of zlib. This project is thus on hold
A naïve png encoder written in nim.
No external dependecies needed, just nim.
Probably unsuitable for serious use, as data is currently stored uncompressed, and no filtering is implemented.
( A 300x300 blue square is ~353kb, opening and saving with paint brings it to ~2kb, to give you an idea of how bad this is. )
See examples for example code, or see graph for more advanced examples.
Currently ONLY supports pngs with 8-bit depth and RGBA colors.
The purpose of this lib is saving pngs, I believe that drawing should be handled by a separate lib that will
then provide a seq of pixels in a suitable format to be used in initPng(w,h,pixels).
Anyway, pixels can be accessed with [i,j] and [i,j]=. Indexing is row-major, so both index start at 0, j grows
from left to right and i from top to bottom ( so the origin is top-left )
Documentation
TODO
- Filters
- A way to choose the best filter ( run all and select the one with len < ?)
- Test and reduce/optimize copying of seq/string, possibly move to arrays