Skip to content
Portable PNG module for Perl 6
Other
  1. Other 100.0%
Branch: master
Clone or download

Latest commit

Latest commit def9503 May 16, 2017

Files

Permalink
Type Name Latest commit message Commit time
Failed to load latest commit information.
examples Catch up to GLR and other spec changes Oct 29, 2015
lib/Image/PNG Catch up to GLR and other spec changes Oct 29, 2015
t Catch up to GLR and other spec changes Oct 29, 2015
.gitignore Initial commit Jan 28, 2015
LICENSE Initial commit Jan 28, 2015
META6.json Use modern META filename May 16, 2017
README.md Minor README correction Nov 5, 2015

README.md

Image::PNG::Portable

This is an almost-pure Perl 6 PNG module.

Status

This module is currently useful for outputting opaque 24-bit truecolor images. Reading, precompression filters, alpha, palettes, grayscale, non-8-bit channels, and ancillary features like gamma correction, color profiles, and textual metadata are all NYI.

Range checks (UInt, UInt8, and PInt, mentioned below) are disabled pending a Rakudo bugfix. Violate them at your peril.

Synopsis

use Image::PNG::Portable;
my $o = Image::PNG::Portable.new: :width(16), :height(16);
$o.set: 8,8, 255,255,255;
$o.write: 'image.png';

Usage

The following types are used internally and in this documentation. They are here for brevity, not exported in the public API.

subset UInt of Int where * >= 0; # unsigned
subset UInt8 of Int where 0 <= * <= 255; # unsigned 8-bit
subset PInt of Int where * > 0; # positive

.new(PInt :$width!, PInt :$height!)

Creates a new Image::PNG::Portable object, initialized to black.

.set(UInt $x, UInt $y, UInt8 $red, UInt8 $green, UInt8 $blue)

Sets the color of a pixel in the image.

.get(UInt $x, UInt $y)

Gets the color of a pixel in the image as a 3-element array of channel values.

.write($file)

Writes the contents of the image to the specified file.

BUGS

None known. Please report bugs at https://github.com/raydiak/Image-PNG-Portable/issues or to raydiak@cyberuniverses.com .

You can’t perform that action at this time.