145 lines
4.9 KiB
PHP
145 lines
4.9 KiB
PHP
<?php
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/*
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Plugin Name: Wavatars
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Plugin URI: http://www.shamusyoung.com/twentysidedtale/?p=1462
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Description: A plugin which generates random avatars for comments.
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Author: Shamus Young
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Version: 1.0.0
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Author URI: http://www.shamusyoung.com/twentysidedtale/
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*/
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define("WAVATAR_SIZE", "80");
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define("WAVATAR_BACKGROUNDS", "4");
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define("WAVATAR_FACES", "11");
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define("WAVATAR_BROWS", "8");
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define("WAVATAR_EYES", "13");
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define("WAVATAR_PUPILS", "11");
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define("WAVATAR_MOUTHS", "19");
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/*-----------------------------------------------------------------------------
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Handy function for converting hus/sat/lum color values to RGB, which makes it
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very easy to generate random-yet-still-vibrant colors.
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-----------------------------------------------------------------------------*/
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function wavatar_hsl ($h, $s, $l)
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{
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if ($h>240 || $h<0) return array(0,0,0);
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if ($s>240 || $s<0) return array(0,0,0);
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if ($l>240 || $l<0) return array(0,0,0);
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if ($h<=40) {
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$R=255;
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$G=(int)($h/40*256);
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$B=0;
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} elseif ($h>40 && $h<=80) {
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$R=(1-($h-40)/40)*256;
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$G=255;
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$B=0;
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} elseif ($h>80 && $h<=120) {
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$R=0;
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$G=255;
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$B=($h-80)/40*256;
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} elseif ($h>120 && $h<=160) {
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$R=0;
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$G=(1-($h-120)/40)*256;
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$B=255;
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} elseif ($h>160 && $h<=200) {
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$R=($h-160)/40*256;
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$G=0;
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$B=255;
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} elseif ($h>200) {
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$R=255;
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$G=0;
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$B=(1-($h-200)/40)*256;
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}
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$R=$R+(240-$s)/240*(128-$R);
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$G=$G+(240-$s)/240*(128-$G);
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$B=$B+(240-$s)/240*(128-$B);
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if ($l<120) {
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$R=($R/120)*$l;
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$G=($G/120)*$l;
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$B=($B/120)*$l;
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} else {
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$R=$l*((256-$R)/120)+2*$R-256;
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$G=$l*((256-$G)/120)+2*$G-256;
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$B=$l*((256-$B)/120)+2*$B-256;
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}
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if ($R<0) $R=0;
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if ($R>255) $R=255;
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if ($G<0) $G=0;
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if ($G>255) $G=255;
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if ($B<0) $B=0;
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if ($B>255) $B=255;
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return array((int)$R,(int)$G,(int)$B);
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}
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/*-----------------------------------------------------------------------------
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Helper function for building a wavatar. This loads an image and adds it to
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our composite using the given color values.
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-----------------------------------------------------------------------------*/
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function wavatar_apply_image ($base, $part)
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{
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$file = dirname(__FILE__).'/parts/' . $part . '.png';
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//echo $file . "<br>";
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$im = @imagecreatefrompng($file);
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if(!$im)
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return;
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imageSaveAlpha($im, true);
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imagecopy($base,$im, 0, 0, 0, 0, WAVATAR_SIZE, WAVATAR_SIZE);
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imagedestroy($im);
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}
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/*-----------------------------------------------------------------------------
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Builds the avatar.
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-----------------------------------------------------------------------------*/
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function wavatar_build ($filename, $seed, $size)
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{
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if (!function_exists (imagecreatetruecolor)) {
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return false;
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}
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$face = 1 + (hexdec (substr ($seed, 1, 2)) % (WAVATAR_FACES));
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$bg_color = (hexdec (substr ($seed, 3, 2)) % 240);
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$fade = 1 + (hexdec (substr ($seed, 5, 2)) % (WAVATAR_BACKGROUNDS));
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$wav_color = (hexdec (substr ($seed, 7, 2)) % 240);
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$brow = 1 + (hexdec (substr ($seed, 9, 2)) % (WAVATAR_BROWS));
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$eyes = 1 + (hexdec (substr ($seed, 11, 2)) % (WAVATAR_EYES));
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$pupil = 1 + (hexdec (substr ($seed, 13, 2)) % (WAVATAR_PUPILS));
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$mouth = 1 + (hexdec (substr ($seed, 15, 2)) % (WAVATAR_MOUTHS));
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// create backgound
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$avatar = imagecreatetruecolor (WAVATAR_SIZE, WAVATAR_SIZE);
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//Pick a random color for the background
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$c = wavatar_hsl ($bg_color, 240, 50);
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$bg = imagecolorallocate ($avatar, $c[0], $c[1], $c[2]);
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imagefill($avatar,0,0,$bg);
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$c = wavatar_hsl ($wav_color, 240, 170);
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$bg = imagecolorallocate ($avatar, $c[0], $c[1], $c[2]);
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//Now add the various layers onto the image
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wavatar_apply_image ($avatar, "fade$fade");
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wavatar_apply_image ($avatar, "mask$face");
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imagefill($avatar, WAVATAR_SIZE / 2,WAVATAR_SIZE / 2,$bg);
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wavatar_apply_image ($avatar, "shine$face");
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wavatar_apply_image ($avatar, "brow$brow");
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wavatar_apply_image ($avatar, "eyes$eyes");
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wavatar_apply_image ($avatar, "pupils$pupil");
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wavatar_apply_image ($avatar, "mouth$mouth");
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//resize if needed
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if ($size != WAVATAR_SIZE) {
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$out = imagecreatetruecolor($size,$size);
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imagecopyresampled ($out,$avatar, 0, 0, 0, 0, $size, $size, WAVATAR_SIZE, WAVATAR_SIZE);
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//header ("Content-type: image/png");
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imagepng($out, $filename);
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imagedestroy($out);
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imagedestroy($avatar);
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} else {
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imagepng($avatar, $filename);
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imagedestroy($avatar);
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}
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return true;
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}
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?>
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