PHP实现批量生成App各种尺寸Logo

<?php
class image {
??? /**
???? * source image
???? *
???? * @var string|array
???? */
??? private $source;
??? /**
???? * temporay image
???? *
???? * @var file
???? */
??? private $image;
??? private $ext;
??? /**
???? * erros
???? *
???? * @var array
???? */
??? private $error;
??? /**
???? * construct
???? *
???? * @param string|array $source
???? */
??? public function __construct($source = NULL) {
??????? if($source != NULL) {
??????????? $this->source($source);
??????? }
??? }
??? /**
???? * set the source image
???? *
???? * @param string|array $source
???? */
??? public function source($source) {
??????? if(!is_array($source)) {
??????????? $this->source["name"] = $source;
??????????? $this->source["tmp_name"] = $source;
??????????? $type = NULL;
??????????? $ext = strtolower(end(explode(".",$source)));
??????????? switch($ext) {
??????????????? case "jpg"? :
??????????????? case "jpeg" : $type = "image/jpeg"; break;
??????????????? case "gif"? : $type = "image/gif"; break;
??????????????? case "png"? : $type = "image/png"; break;
??????????? }
??????????? $this->source["type"] = $type;
??????? } else {
??????????? $this->source = $source;
??????? }
??????? $this->destination = $this->source["name"];
??? }
??? /**
???? * resize the image
???? *
???? * @param int $width
???? * @param int $height
???? */
??? public function resize($width = NULL,$height = NULL) {
??????? if(isset($this->source["tmp_name"]) && file_exists($this->source["tmp_name"])) {
??????????? list($source_width,$source_height) = getimagesize($this->source["tmp_name"]);
??????????? if(($width == NULL) && ($height != NULL)) {
??????????????? $width = ($source_width * $height) / $source_height;
??????????? }
??????????? if(($width != NULL) && ($height == NULL)) {
??????????????? $height = ($source_height * $width) / $source_width;
??????????? }
??????????? if(($width == NULL) && ($height == NULL)) {
??????????????? $width = $source_width;
??????????????? $height = $source_height;
??????????? }
??????????? switch($this->source["type"]) {
??????????????? case "image/jpeg" : $created = imagecreatefromjpeg($this->source["tmp_name"]); break;
??????????????? case "image/gif"? : $created = imagecreatefromgif($this->source["tmp_name"]);? break;
??????????????? case "image/png"? : $created = imagecreatefrompng($this->source["tmp_name"]);? break;
??????????? }
??????????? $this->image = imagecreatetruecolor($width,$height);
??????????? imagecopyresampled($this->image,$created,$width,$height,$source_width,$source_height);
??????? }
??? }
??? /**
???? * add watermark on image
???? *
???? * @param string $mark
???? * @param int $opac
???? * @param int $x_pos
???? * @param int $y_pos
???? */
??? public function watermark($mark,$opac,$x_pos,$y_pos) {
??????? if(file_exists($mark) && ($this->image != "")) {
??????????? $ext = strtolower(end(explode(".",$mark)));
??????????? switch($ext) {
??????????????? case "jpg"? :
??????????????? case "jpeg" : $watermark = imagecreatefromjpeg($mark); break;
??????????????? case "gif"? : $watermark = imagecreatefromgif($mark);? break;
??????????????? case "png"? : $watermark = imagecreatefrompng($mark);? break;
??????????? }
??????????? list($watermark_width,$watermark_height) = getimagesize($mark);
??????????? $source_width = imagesx($this->image);
??????????? $source_height = imagesy($this->image);
??????????? if($x_pos == "top") $pos? = "t"; else $pos? = "b";
??????????? if($y_pos == "left") $pos .= "l"; else $pos .= "r";
??????????? $dest_x = 0;
??????????? $dest_y = 0;
??????????? switch($pos) {
??????????????? case "tr" : $dest_x = $source_width - $watermark_width; break;
??????????????? case "bl" : $dest_y = $source_height - $watermark_height; break;
??????????????? case "br" : $dest_x = $source_width - $watermark_width; $dest_y = $source_height - $watermark_height; break;
??????????? }
??????????? imagecopymerge($this->image,$watermark,$dest_x,$dest_y,$watermark_width,$watermark_height,$opac);
??????? }
??? }
??? /**
???? * crop the image
???? *
???? * @param int $x
???? * @param int $y
???? * @param int $width
???? * @param int $height
???? */
??? public function crop($x,$y,$height) {
??????? if(isset($this->source["tmp_name"]) && file_exists($this->source["tmp_name"]) && ($width > 10) && ($height > 10)) {
??????????? switch($this->source["type"]) {
??????????????? case "image/jpeg" : $created = imagecreatefromjpeg($this->source["tmp_name"]); break;
??????????????? case "image/gif"? : $created = imagecreatefromgif($this->source["tmp_name"]);? break;
??????????????? case "image/png"? : $created = imagecreatefrompng($this->source["tmp_name"]);? break;
??????????? }??????????
??????????? $this->image = imagecreatetruecolor($width,$height);
??????????? imagecopy($this->image,$x,$height);
??????? }
??? }
??? /**
???? * create final image file
???? *
???? * @param string $destination
???? * @param int $quality
???? */
??? public function create($destination,$quality = 100) {
??????? if($this->image != "") {
??????????? $extension = substr($destination,-3,3);
??????????? switch($extension) {
??????????????? case "gif" :?
??????????????????? imagegif($this->image,$destination,$quality);
??????????????????? break;
??????????????? case "png" :
??????????????????? $quality = ceil($quality/10) - 1;
??????????????????? imagepng($this->image,$quality);
??????????????????? break;
??????????????? default??? :
??????????????????? imagejpeg($this->image,$quality);
??????????????????? break;
??????????? }
??????? }
??? }
??? /**
???? * check if extension is valid
???? *
???? */
??? public function validate_extension() {
??????? if(isset($this->source["tmp_name"]) && file_exists($this->source["tmp_name"])) {
??????????? $exts = array("image/jpeg","image/pjpeg","image/png","image/x-png");
??????????? $ext = $this->source["type"];
??????????? $valid = 0;
??????????? $this->ext = '.not_found';
??????????? if ($ext == $exts[0] || $ext == $exts[1]) {
??????????????? $valid = 1;
??????????????? $this->ext = '.jpg';
??????????? }
??????????? // if ($ext == $exts[2]) {
??????????? //? $valid = 1;
??????????? //? $this->ext = '.gif';
??????????? // }
??????????? if ($ext == $exts[2] || $ext == $exts[3]) {
??????????????? $valid = 1;
??????????????? $this->ext = '.png';
??????????? }
??????????? if($valid != 1) {
??????????????? $this->error .= "extension";
??????????? }
??????? } else {
??????????? $this->error .= "source";
??????? }
??? }
??? /**
???? * check if the size is correct
???? *
???? * @param int $max
???? */
??? public function validate_size($max) {
??????? if(isset($this->source["tmp_name"]) && file_exists($this->source["tmp_name"])) {
??????????? $max = $max * 1024;
??????????? if($this->source["size"] >= $max) {
??????????????? $this->error .= "size";
??????????? }
??????? } else {
??????????? $this->error .= "source";
??????? }
??? }
??? /**
???? * check if the dimension is correct
???? *
???? * @param int $limit_width
???? * @param int $limit_height
???? */
??? public function validate_dimension($limit_width,$limit_height) {
??????? if(isset($this->source["tmp_name"]) && file_exists($this->source["tmp_name"])) {
??????????? list($source_width,$source_height) = getimagesize($this->source["tmp_name"]);
??????????? if(($source_width > $limit_width) || ($source_height > $limit_height)) {
??????????????? $this->error .= "dimension";
??????????? }
??????? } else {
??????????? $this->error .= "source";
??????? }
??? }
??? /**
???? * get the found errors
???? *
???? */
??? public function error() {
??????? $error = array();
??????? if(stristr($this->error,"source")) $error[] = "找不到上传文件";
??????? if(stristr($this->error,"dimension")) $error[] = "上传图片尺寸太大";
??????? if(stristr($this->error,"extension")) $error[] = "不符合要求的格式";
??????? if(stristr($this->error,"size")) $error[] = "图片文件太大";
??????? return $error;
??? }
??? public function error_string() {
??????? $error = "";
??????? if(stristr($this->error,"source")) $error .= "找不到上传文件 / ";
??????? if(stristr($this->error,"dimension")) $error .= "上传图片尺寸太大 / ";
??????? if(stristr($this->error,"extension")) $error .= "不符合要求的格式 / ";
??????? if(stristr($this->error,"size")) $error .= "图片文件太大 / ";
??????? if(eregi(" / $",$error)) {
??????????? $error = substr($error,-3);
??????? }
??????? return $error;
??? }
??? public function ext() {
??????? return $this->ext;
??? }
}