Pixeler
Render images in CLI with UTF-8 characters.
Installation
Require in your project with composer :
$ composer require lastguest/pixelerThis will also install a pixeler tool in :
your_project_dir/vendor/bin/pixeler
It works exactly like the example below.
Example
Create a file pixel.php :
<?php
// Include autoloader
include __DIR__."/vendor/autoload.php";
// Parse options from command line
$opts = array_merge([
'd' => 1, // Dithering mode : 0 = DITHER_NONE, 1 = DITHER_ERROR
'f' => false,
'r' => 1.0, // Resize factor 1.0 = 100%
'w' => 0.75, // Dither treshold weight
], getopt("f:r:w:d:ib"));
// An image file/url is required.
$opts['f'] || die("Must specify an image file.\n");
// The -i option inverts the image
$image = Pixeler\Pixeler::image($opts['f'], $opts['r'], isset($opts['i']), $opts['w'], $opts['d']);
// No colors if "-b" is passed
isset($opts['b']) && $image->clearColors();
// The Pixeler\Image instance render itself if casted to a string
echo $image;$ php pixel.php -f http://drop.caffeina.co/image/160L0Y3C0a29/vocaloid.jpg -r .25 -w 0.25 -i
$ php pixel.php -f http://flippywall.com/wp-content/uploads/2014/07/Manga-Girl-Wallpaper-16.jpg -r 0.15 -w 0.5 -i
$ php pixel.php -f http://blog.circleci.com/wp-content/uploads/2014/07/elephant.jpg -r 0.3 -w 0.5 -b
Dithering
Use the -d option to choose 1-bit dithering mode.
| Command | Constant | Description |
|---|---|---|
-d0 |
Pixeler\Image::DITHER_NONE | Threshold 1-bit quantization |
-d1 |
Pixeler\Image::DITHER_ERROR | Dither image with 1-bit Atkinson Dithering |
Animation Example
You will see a lot of tearing, need some kind of vsync wait.
<?php
// Vendors
include __DIR__."/vendor/autoload.php";
$screen = new Pixeler\Canvas(160,100);
$sh2 = $screen->height()/2;
$sh4 = $sh2/1.5;
$ph = pi()/32;
$i = 0;
// To exit, press Ctr-C
while(1){
$screen->clear();
for ($x=0,$c=$screen->width(); $x < $c; $x++){
$y = $sh4*sin($i++/128 + $ph*$x);
$screen->setPixel($x,$sh2 + $y);
$screen->setPixel($x,$sh2 + $y/2);
$screen->setPixel($x,$sh2 + $y/4);
$screen->setPixel($x,$sh2);
}
echo $screen;
}