1: <?php
  2: //= api-features
  3: //: - Skin tools
  4: namespace aliuly\common;
  5: use pocketmine\entity\Human;
  6: /**
  7:  * Routines for manipulating skins
  8:  */
  9: abstract class SkinUtils {
 10:   const RAW_FMT = "raw";
 11:   const PNG_FMT = "png";
 12:   const AUTO_FMT = "";
 13:   /**
 14:    * Return supported file formats
 15:    * @return str[]
 16:    */
 17:   static public function formats() {
 18:     $fmt = [ self::RAW_FMT => self::RAW_FMT ];
 19:         if(extension_loaded("gd")) $fmt[self::PNG_FMT] = self::PNG_FMT;
 20:     return $fmt;
 21:   }
 22:   /**
 23:    * Check if the filename extension is .png
 24:    * @param str $f
 25:    * @return bool
 26:    */
 27:   static public function isPngExt($f) {
 28:     return preg_match('/\.[pP][nN][gG]$/',$f);
 29:   }
 30:   /**
 31:    * Check if file is a valid skin
 32:    * @param str $file
 33:    * @return bool
 34:    */
 35:   static public function isSkinFile($file) {
 36:     if (!file_exists($file)) return false;
 37:     if (preg_match('/\.[sS][kK][iI][nN]$/', $file)) return true;
 38:     if (!extension_loaded("gd")) return false;
 39:     if (self::isPngExt($file)) {
 40:       $size = getimagesize($file);
 41:       //print_r($size);//##DEBUG
 42:       //print_r([$file,IMAGETYPE_PNG]);//##DEBUG
 43:       //var_dump($size[0] == 64 && $size[1] == 32 && $size[2] == IMAGETYPE_PNG);//##DEBUG
 44:       return ($size[0] == 64 && $size[1] == 32 && $size[2] == IMAGETYPE_PNG);
 45:     }
 46:     return false;
 47:   }
 48: 
 49:   /**
 50:    * Change the skin type (slim or non-slim)
 51:    * @param Human $human
 52:    * @param bool $slim
 53:    */
 54:   static public function setSlim(Human $human, $slim = false) {
 55:     $human->setSkin($human->getSkinData(),$slim);
 56:   }
 57:   /**
 58:    * Save skin
 59:    * @param Human $human
 60:    * @param str $fn
 61:    * @param str $fmt
 62:    * @return int
 63:    */
 64:   static public function saveSkin(Human $human, $fn, $fmt = self::AUTO_FMT) {
 65:     if ($fmt === self::AUTO_FMT) {
 66:       $fmt = self::RAW_FMT;
 67:       if (self::isPngExt($fn)) $fmt = self::PNG_FMT;
 68:     }
 69:     if(extension_loaded("gd") && $fmt == self::PNG_FMT) {
 70:       $img = imagecreatetruecolor(64, 32);
 71:       // Allocate colors...
 72:       $colors = [];
 73:       $bytes = $human->getSkinData();
 74:       echo "BYTES=".strlen($bytes)."\n";//##DEBUG
 75:       $x = $y = $c = 0;
 76:       while ($y < 32) {
 77:         $cid = substr($bytes, $c, 3);
 78:         if (!isset($colors[$cid])) {
 79:           $colors[$cid] = imagecolorallocate($img, ord($cid{0}), ord($cid{1}),ord($cid{2}) );
 80:         }
 81:         imagesetpixel($img, $x, $y, $colors[$cid]);
 82:         $x++;
 83:         $c += 4;
 84:         if ($x === 64) {
 85:           $x = 0;
 86:           $y++;
 87:         }
 88:       }
 89:       echo  "COLORS=".count($colors)."\n";//##DEBUG
 90:       if (!imagepng($img, $fn)) {
 91:         imagedestroy($img);
 92:         return 0;
 93:       }
 94:       imagedestroy($img);
 95:       return filesize($fn);
 96:     }
 97:     $bin = zlib_encode($human->getSkinData(),ZLIB_ENCODING_DEFLATE,9);
 98:     file_put_contents($fn,$bin);
 99:     return strlen($bin);
100:     }
101: 
102:   /**
103:    * Load skin
104:    * @param Human $human
105:    * @param bool $slim
106:    * @param str $fn
107:    * @return bool
108:    */
109:   static public function loadSkin(Human $human, $slim, $fn) {
110:     if (self::isPngExt($fn)) {
111:       if(!extension_loaded("gd")) return false;
112:       if(!self::isSkinFile($fn)) return false;
113:       $img = imagecreatefrompng($fn);
114:       if ($img === false) return false;
115:       $bytes = "";
116:       $x = $y = 0;
117:       while ($y < 32) {
118:         $rgb = imagecolorat($img,$x,$y);
119:         $r = ($rgb >> 16) & 0xFF;
120:         $g = ($rgb >> 8) & 0xFF;
121:         $b = $rgb & 0xFF;
122:         $bytes .= chr($r).chr($g).chr($b).chr(255);
123: 
124:         $x++;
125:         if ($x === 64) {
126:           $x = 0;
127:           $y++;
128:         }
129:       }
130:       imagedestroy($img);
131:       echo "BYTES=".strlen($bytes)."\n";//##DEBUG
132:       $human->setSkin($bytes,$slim);
133:       return true;
134:     }
135:     $bin = file_get_contents($fn);
136:     if ($bin === false) return false;
137:     $human->setSkin(zlib_decode($bin),$slim);
138:     return true;
139:   }
140: }
141: