Re: ⎕PNG

[Chris Moller]

/Very/ cool!

On 9/21/22 07:49, Dr. Jürgen Sauermann wrote:

Hi,

I would like to announce a new GNU APL feature: ⎕PNG


directly understood by web browsers.

Unlike some of the other image file formats around, the PNG file format

reasons for choosing it in GNU APL.


arrays are read or eventually stored. ⎕PNG tries to close this gap.

*⎕PNG* is comprised of three simple sub-function for:

1. reading a *.png* file into an APL array of pixels,
2. displaying such an array in a GTK window on the screen, and



www.libpng.org) therefore ⎕PNG is merely a lightweight wrapper around


*SVN 1589*, see also i*nfo apl* section 2.32 for details.

Enjoy,
Jürgen

PNG stands for "Portable Network Graphics" and is a file format, standardized in RFC 2083, for (still) images that is, among several other use cases, also has no strings attached, such as patents or copyrights. This was one of the While APL appears to be the perfect choice for manipulating the large pixel arrays of images, this is not the case for the files on disc from which the pixel 3. writing a (supposedly somehow manipulated) pixel array into a *.png* file. The main work in the conversions above is actually provided by *libpng* (see *libpng*. ⎕PNG is supposed to support all file variants (colour and grayscale, different pixel resolutions from 1 to 16 bits, with or without alpha channel), on input and most (= all but pixel arrays using colour palettes) on output.

OpenPGP_0xDA6C01938888083E.asc
Description: OpenPGP public key

OpenPGP_signature
Description: OpenPGP digital signature