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January 31, 2018 07:27
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Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -0,0 +1,274 @@ <?php /** * 随机头像生成 * 生成算法来自Github，具体出处找不到了，做了少量修改 * @author loveyu */ /** * 头像HASH值 */ define("AVATAR_HASH", (isset($_GET['hash']) && !empty($_GET['hash'])) ? md5($_GET['hash']) : md5(rand(0, 1000000))); /** * 头像大小 */ define("AVATAR_SIZE", (isset($_GET['size']) && $_GET['size'] > 10) ? $_GET['size'] : 100); /** * generate sprite for corners and sides * @param $shape * @param $R * @param $G * @param $B * @param $rotation * @return resource */ function getsprite($shape, $R, $G, $B, $rotation){ global $spriteZ; $sprite = imagecreatetruecolor($spriteZ, $spriteZ); imageantialias($sprite, true); $fg = imagecolorallocate($sprite, $R, $G, $B); $bg = imagecolorallocate($sprite, 255, 255, 255); imagefilledrectangle($sprite, 0, 0, $spriteZ, $spriteZ, $bg); switch($shape){ case 0: // triangle $shape = array(0.5, 1, 1, 0, 1, 1); break; case 1: // parallelogram $shape = array(0.5, 0, 1, 0, 0.5, 1, 0, 1); break; case 2: // mouse ears $shape = array(0.5, 0, 1, 0, 1, 1, 0.5, 1, 1, 0.5); break; case 3: // ribbon $shape = array(0, 0.5, 0.5, 0, 1, 0.5, 0.5, 1, 0.5, 0.5); break; case 4: // sails $shape = array(0, 0.5, 1, 0, 1, 1, 0, 1, 1, 0.5); break; case 5: // fins $shape = array(1, 0, 1, 1, 0.5, 1, 1, 0.5, 0.5, 0.5); break; case 6: // beak $shape = array(0, 0, 1, 0, 1, 0.5, 0, 0, 0.5, 1, 0, 1); break; case 7: // chevron $shape = array(0, 0, 0.5, 0, 1, 0.5, 0.5, 1, 0, 1, 0.5, 0.5); break; case 8: // fish $shape = array(0.5, 0, 0.5, 0.5, 1, 0.5, 1, 1, 0.5, 1, 0.5, 0.5, 0, 0.5); break; case 9: // kite $shape = array(0, 0, 1, 0, 0.5, 0.5, 1, 0.5, 0.5, 1, 0.5, 0.5, 0, 1); break; case 10: // trough $shape = array(0, 0.5, 0.5, 1, 1, 0.5, 0.5, 0, 1, 0, 1, 1, 0, 1); break; case 11: // rays $shape = array(0.5, 0, 1, 0, 1, 1, 0.5, 1, 1, 0.75, 0.5, 0.5, 1, 0.25); break; case 12: // double rhombus $shape = array(0, 0.5, 0.5, 0, 0.5, 0.5, 1, 0, 1, 0.5, 0.5, 1, 0.5, 0.5, 0, 1); break; case 13: // crown $shape = array(0, 0, 1, 0, 1, 1, 0, 1, 1, 0.5, 0.5, 0.25, 0.5, 0.75, 0, 0.5, 0.5, 0.25); break; case 14: // radioactive $shape = array(0, 0.5, 0.5, 0.5, 0.5, 0, 1, 0, 0.5, 0.5, 1, 0.5, 0.5, 1, 0.5, 0.5, 0, 1); break; default: // tiles $shape = array(0, 0, 1, 0, 0.5, 0.5, 0.5, 0, 0, 0.5, 1, 0.5, 0.5, 1, 0.5, 0.5, 0, 1); break; } /* apply ratios */ for($i = 0; $i < count($shape); $i++){ $shape[$i] = $shape[$i] * $spriteZ; } imagefilledpolygon($sprite, $shape, count($shape) / 2, $fg); /* rotate the sprite */ for($i = 0; $i < $rotation; $i++){ $sprite = imagerotate($sprite, 90, $bg); } return $sprite; } /** * generate sprite for center block * @param $shape * @param $fR * @param $fG * @param $fB * @param $bR * @param $bG * @param $bB * @param $usebg * @return resource */ function getcenter($shape, $fR, $fG, $fB, $bR, $bG, $bB, $usebg){ global $spriteZ; $sprite = imagecreatetruecolor($spriteZ, $spriteZ); imageantialias($sprite, true); $fg = imagecolorallocate($sprite, $fR, $fG, $fB); /* make sure there's enough contrast before we use background color of side sprite */ if($usebg > 0 && (abs($fR - $bR) > 127 || abs($fG - $bG) > 127 || abs($fB - $bB) > 127)){ $bg = imagecolorallocate($sprite, $bR, $bG, $bB); } else{ $bg = imagecolorallocate($sprite, 255, 255, 255); } imagefilledrectangle($sprite, 0, 0, $spriteZ, $spriteZ, $bg); switch($shape){ case 0: // empty $shape = array(); break; case 1: // fill $shape = array(0, 0, 1, 0, 1, 1, 0, 1); break; case 2: // diamond $shape = array(0.5, 0, 1, 0.5, 0.5, 1, 0, 0.5); break; case 3: // reverse diamond $shape = array(0, 0, 1, 0, 1, 1, 0, 1, 0, 0.5, 0.5, 1, 1, 0.5, 0.5, 0, 0, 0.5); break; case 4: // cross $shape = array(0.25, 0, 0.75, 0, 0.5, 0.5, 1, 0.25, 1, 0.75, 0.5, 0.5, 0.75, 1, 0.25, 1, 0.5, 0.5, 0, 0.75, 0, 0.25, 0.5, 0.5); break; case 5: // morning star $shape = array(0, 0, 0.5, 0.25, 1, 0, 0.75, 0.5, 1, 1, 0.5, 0.75, 0, 1, 0.25, 0.5); break; case 6: // small square $shape = array(0.33, 0.33, 0.67, 0.33, 0.67, 0.67, 0.33, 0.67); break; case 7: // checkerboard $shape = array(0, 0, 0.33, 0, 0.33, 0.33, 0.66, 0.33, 0.67, 0, 1, 0, 1, 0.33, 0.67, 0.33, 0.67, 0.67, 1, 0.67, 1, 1, 0.67, 1, 0.67, 0.67, 0.33, 0.67, 0.33, 1, 0, 1, 0, 0.67, 0.33, 0.67, 0.33, 0.33, 0, 0.33); break; } /* apply ratios */ for($i = 0; $i < count($shape); $i++){ $shape[$i] = $shape[$i] * $spriteZ; } if(count($shape) > 0){ imagefilledpolygon($sprite, $shape, count($shape) / 2, $fg); } return $sprite; } /** * 调整颜色 * @param $r * @param $g * @param $b */ function fix_rgb(&$r, &$g, &$b){ if($r==0){ $r = 10; } if($g==0){ $g = 10; } if($b ==0){ $b = 10; } while($r < 210){ $r *= 1.3; } while($g < 100){ $g *= 1.3; } while($b < 180){ $b *= 1.3; } if($r > 255){ $r = 511 - $r; } if($g > 255){ $g = 511 - $g; } if($b > 255){ $b = 511 - $b; } } $csh = hexdec(substr(AVATAR_HASH, 0, 1)); // corner sprite shape $ssh = hexdec(substr(AVATAR_HASH, 1, 1)); // side sprite shape $xsh = hexdec(substr(AVATAR_HASH, 2, 1)) & 7; // center sprite shape $cro = hexdec(substr(AVATAR_HASH, 3, 1)) & 3; // corner sprite rotation $sro = hexdec(substr(AVATAR_HASH, 4, 1)) & 3; // side sprite rotation $xbg = hexdec(substr(AVATAR_HASH, 5, 1)) % 2; // center sprite background /* corner sprite foreground color */ $cfr = hexdec(substr(AVATAR_HASH, 6, 2)); $cfg = hexdec(substr(AVATAR_HASH, 8, 2)); $cfb = hexdec(substr(AVATAR_HASH, 10, 2)); fix_rgb($cfr, $cfg, $cfb); /* side sprite foreground color */ $sfr = hexdec(substr(AVATAR_HASH, 12, 2)); $sfg = hexdec(substr(AVATAR_HASH, 14, 2)); $sfb = hexdec(substr(AVATAR_HASH, 16, 2)); fix_rgb($sfr, $sfg, $sfb); /* final angle of rotation */ $angle = hexdec(substr(AVATAR_HASH, 18, 2)); /* size of each sprite */ $spriteZ = 128; /* start with blank 3x3 identicon */ $identicon = imagecreatetruecolor($spriteZ * 3, $spriteZ * 3); imageantialias($identicon, true); /* assign white as background */ $bg = imagecolorallocate($identicon, 255, 255, 255); imagefilledrectangle($identicon, 0, 0, $spriteZ, $spriteZ, $bg); /* generate corner sprites */ $corner = getsprite($csh, $cfr, $cfg, $cfb, $cro); imagecopy($identicon, $corner, 0, 0, 0, 0, $spriteZ, $spriteZ); $corner = imagerotate($corner, 90, $bg); imagecopy($identicon, $corner, 0, $spriteZ * 2, 0, 0, $spriteZ, $spriteZ); $corner = imagerotate($corner, 90, $bg); imagecopy($identicon, $corner, $spriteZ * 2, $spriteZ * 2, 0, 0, $spriteZ, $spriteZ); $corner = imagerotate($corner, 90, $bg); imagecopy($identicon, $corner, $spriteZ * 2, 0, 0, 0, $spriteZ, $spriteZ); /* generate side sprites */ $side = getsprite($ssh, $sfr, $sfg, $sfb, $sro); imagecopy($identicon, $side, $spriteZ, 0, 0, 0, $spriteZ, $spriteZ); $side = imagerotate($side, 90, $bg); imagecopy($identicon, $side, 0, $spriteZ, 0, 0, $spriteZ, $spriteZ); $side = imagerotate($side, 90, $bg); imagecopy($identicon, $side, $spriteZ, $spriteZ * 2, 0, 0, $spriteZ, $spriteZ); $side = imagerotate($side, 90, $bg); imagecopy($identicon, $side, $spriteZ * 2, $spriteZ, 0, 0, $spriteZ, $spriteZ); /* generate center sprite */ $center = getcenter($xsh, $cfr, $cfg, $cfb, $sfr, $sfg, $sfb, $xbg); imagecopy($identicon, $center, $spriteZ, $spriteZ, 0, 0, $spriteZ, $spriteZ); // $identicon=imagerotate($identicon,$angle,$bg); /* make white transparent */ imagecolortransparent($identicon, $bg); /* create blank image according to specified dimensions */ $resized = imagecreatetruecolor(AVATAR_SIZE, AVATAR_SIZE); imageantialias($resized, true); /* assign white as background */ $bg = imagecolorallocate($resized, 255, 255, 255); imagefilledrectangle($resized, 0, 0, AVATAR_SIZE, AVATAR_SIZE, $bg); /* resize identicon according to specification */ imagecopyresampled($resized, $identicon, 0, 0, (imagesx($identicon) - $spriteZ * 3) / 2, (imagesx($identicon) - $spriteZ * 3) / 2, AVATAR_SIZE, AVATAR_SIZE, $spriteZ * 3, $spriteZ * 3); /* make white transparent */ imagecolortransparent($resized, $bg); /* and finally, send to standard output */ header("Content-Type: image/png"); imagepng($resized);