增加了裁图工具
This commit is contained in:
Li Jianxuan
parent
f6b1acc273
commit
e2f2b2ae71
|
|
@ -9,153 +9,224 @@ namespace Files;
|
|||
*/
|
||||
class Thumbnail {
|
||||
|
||||
private $maxWidth;
|
||||
private $maxHeight;
|
||||
private $scale;
|
||||
private $inflate;
|
||||
private $types;
|
||||
private $imgLoaders;
|
||||
private $imgCreators;
|
||||
private $source;
|
||||
private $sourceWidth;
|
||||
private $sourceHeight;
|
||||
private $sourceMime;
|
||||
private $thumb;
|
||||
private $thumbWidth;
|
||||
private $thumbHeight;
|
||||
|
||||
public function __construct($maxWidth, $maxHeight, $scale = true, $inflate = false) {
|
||||
$this->maxWidth = $maxWidth;
|
||||
$this->maxHeight = $maxHeight;
|
||||
$this->scale = $scale;
|
||||
$this->inflate = $inflate;
|
||||
$this->types = array(
|
||||
'image/jpeg',
|
||||
'image/png',
|
||||
'image/gif'
|
||||
);
|
||||
//加载MIME类型图像的函数名称
|
||||
$this->imgLoaders = array(
|
||||
'image/jpeg' => 'imagecreatefromjpeg',
|
||||
'image/png' => 'imagecreatefrompng',
|
||||
'image/gif' => 'imagecreatefromgif'
|
||||
);
|
||||
//储存创建MIME类型图片的函数名称
|
||||
$this->imgCreators = array(
|
||||
'image/jpeg' => 'imagejpeg',
|
||||
'image/png' => 'imagepng',
|
||||
'image/gif' => 'imagegif'
|
||||
);
|
||||
}
|
||||
/**
|
||||
* 文件方式加载图片
|
||||
* @param string $image 源图片
|
||||
* @return bool
|
||||
*/
|
||||
public function loadFile($image){
|
||||
if(!$dims = @getimagesize($image)){
|
||||
trigger_error("源图片不存在");
|
||||
}
|
||||
if(in_array($dims['mime'], $this->types)){
|
||||
$loader = $this->imgLoaders[$dims['mime']];
|
||||
$this->source = $loader($image);
|
||||
if($dims['mime'] == 'image/png' || $dims['mime'] == 'image/gif'){
|
||||
imagesavealpha($this->source, true);
|
||||
}
|
||||
$this->sourceWidth = $dims[0];
|
||||
$this->sourceHeight = $dims[1];
|
||||
$this->sourceMime = $dims['mime'];
|
||||
$this->initThumb();
|
||||
return TRUE;
|
||||
}else{
|
||||
trigger_error('不支持'.$dims['mime']."图片类型");
|
||||
}
|
||||
}
|
||||
/**
|
||||
* 字符串方式加载图片
|
||||
* @param string $image 字符串
|
||||
* @param string $mime 图片类型
|
||||
* @return type
|
||||
*/
|
||||
public function loadData($image,$mime){
|
||||
if(in_array($mime, $this->types)){
|
||||
if($this->source = @imagecreatefromstring($image)){
|
||||
$this->sourceWidth = imagesx($this->source);
|
||||
$this->sourceHeight = imagesy($this->source);
|
||||
$this->sourceMime = $mime;
|
||||
$this->initThumb();
|
||||
return TRUE;
|
||||
}else{
|
||||
trigger_error("不能从字符串加载图片");
|
||||
}
|
||||
}else{
|
||||
trigger_error("不支持".$mime."图片格式");
|
||||
}
|
||||
}
|
||||
/**
|
||||
* 生成缩略图
|
||||
* @param string $file 文件名。如果不为空则储存为文件，否则直接输出到浏览器
|
||||
*/
|
||||
public function buildThumb($file = NULL){
|
||||
$creator = $this->imgCreators[$this->sourceMime];
|
||||
if(isset($file) && $this->thumb !== NULL){
|
||||
return $creator($this->thumb,$file);
|
||||
}else{
|
||||
return false;
|
||||
}
|
||||
}
|
||||
/**
|
||||
* 处理缩放
|
||||
*/
|
||||
public function initThumb(){
|
||||
if($this->scale){
|
||||
if($this->sourceWidth > $this->sourceHeight){
|
||||
$this->thumbWidth = $this->maxWidth;
|
||||
$this->thumbHeight = floor($this->sourceHeight*($this->maxWidth/$this->sourceWidth));
|
||||
}elseif($this->sourceWidth < $this->sourceHeight){
|
||||
$this->thumbHeight = $this->maxHeight;
|
||||
$this->thumbWidth = floor($this->sourceWidth*($this->maxHeight/$this->sourceHeight));
|
||||
}else{
|
||||
$this->thumbWidth = $this->maxWidth;
|
||||
$this->thumbHeight = $this->maxHeight;
|
||||
}
|
||||
}
|
||||
|
||||
if($this->sourceWidth <= $this->maxWidth && $this->sourceHeight <= $this->maxHeight && $this->inflate == FALSE){
|
||||
$this->thumb = NULL;
|
||||
}else{
|
||||
$this->thumb = imagecreatetruecolor($this->thumbWidth, $this->thumbHeight);
|
||||
if($this->sourceMime == 'image/png' || $this->sourceMime == 'image/gif')
|
||||
{
|
||||
|
||||
imagealphablending($this->thumb, true);
|
||||
imagesavealpha($this->thumb, true);
|
||||
if($this->sourceMime == 'image/gif')
|
||||
{
|
||||
$bgcolor=imagecolorallocate($this->thumb,0,0,0);
|
||||
$transparent = imagecolortransparent($this->thumb,$bgcolor) ;
|
||||
}
|
||||
if($this->sourceMime == 'image/png')
|
||||
{
|
||||
$transparent = imagecolorallocatealpha($this->thumb, 0, 0, 0, 127);
|
||||
}
|
||||
imagefill($this->thumb, 0, 0, $transparent);
|
||||
private $maxWidth;
|
||||
private $maxHeight;
|
||||
private $scale;
|
||||
private $inflate;
|
||||
private $types;
|
||||
private $imgLoaders;
|
||||
private $imgCreators;
|
||||
private $source;
|
||||
private $sourceWidth;
|
||||
private $sourceHeight;
|
||||
private $sourceMime;
|
||||
private $thumb;
|
||||
private $thumbWidth;
|
||||
private $thumbHeight;
|
||||
|
||||
public function __construct($maxWidth, $maxHeight, $scale = true, $inflate = false) {
|
||||
$this->maxWidth = $maxWidth;
|
||||
$this->maxHeight = $maxHeight;
|
||||
$this->scale = $scale;
|
||||
$this->inflate = $inflate;
|
||||
$this->types = array(
|
||||
'image/jpeg',
|
||||
'image/png',
|
||||
'image/gif'
|
||||
);
|
||||
//加载MIME类型图像的函数名称
|
||||
$this->imgLoaders = array(
|
||||
'image/jpeg' => 'imagecreatefromjpeg',
|
||||
'image/png' => 'imagecreatefrompng',
|
||||
'image/gif' => 'imagecreatefromgif'
|
||||
);
|
||||
//储存创建MIME类型图片的函数名称
|
||||
$this->imgCreators = array(
|
||||
'image/jpeg' => 'imagejpeg',
|
||||
'image/png' => 'imagepng',
|
||||
'image/gif' => 'imagegif'
|
||||
);
|
||||
}
|
||||
|
||||
/**
|
||||
* 文件方式加载图片
|
||||
* @param string $image 源图片
|
||||
* @return bool
|
||||
*/
|
||||
public function loadFile($image){
|
||||
if(!$dims = @getimagesize($image)){
|
||||
trigger_error("源图片不存在");
|
||||
}
|
||||
if(in_array($dims['mime'], $this->types)){
|
||||
$loader = $this->imgLoaders[$dims['mime']];
|
||||
$this->source = $loader($image);
|
||||
if($dims['mime'] == 'image/png' || $dims['mime'] == 'image/gif'){
|
||||
imagesavealpha($this->source, true);
|
||||
}
|
||||
imagecopyresampled($this->thumb, $this->source, 0, 0, 0, 0, $this->thumbWidth, $this->thumbHeight, $this->sourceWidth, $this->sourceHeight);
|
||||
}
|
||||
}
|
||||
|
||||
public function getMine(){
|
||||
return $this->sourceMime;
|
||||
}
|
||||
|
||||
public function getThumbWidth(){
|
||||
return $this->thumbWidth;
|
||||
}
|
||||
|
||||
public function getThumbHeight(){
|
||||
return $this->thumbHeight;
|
||||
}
|
||||
$this->sourceWidth = $dims[0];
|
||||
$this->sourceHeight = $dims[1];
|
||||
$this->sourceMime = $dims['mime'];
|
||||
$this->initThumb();
|
||||
return TRUE;
|
||||
}else{
|
||||
trigger_error('不支持'.$dims['mime']."图片类型");
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* 字符串方式加载图片
|
||||
* @param string $image 字符串
|
||||
* @param string $mime 图片类型
|
||||
* @return type
|
||||
*/
|
||||
public function loadData($image,$mime){
|
||||
if(in_array($mime, $this->types)){
|
||||
if($this->source = @imagecreatefromstring($image)){
|
||||
$this->sourceWidth = imagesx($this->source);
|
||||
$this->sourceHeight = imagesy($this->source);
|
||||
$this->sourceMime = $mime;
|
||||
$this->initThumb();
|
||||
return TRUE;
|
||||
}else{
|
||||
trigger_error("不能从字符串加载图片");
|
||||
}
|
||||
}else{
|
||||
trigger_error("不支持".$mime."图片格式");
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* 生成缩略图
|
||||
* @param string $file 文件名。如果不为空则储存为文件，否则直接输出到浏览器
|
||||
*/
|
||||
public function buildThumb($file = NULL){
|
||||
$creator = $this->imgCreators[$this->sourceMime];
|
||||
if(isset($file) && $this->thumb !== NULL){
|
||||
return $creator($this->thumb,$file);
|
||||
}else{
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* 处理缩放
|
||||
*/
|
||||
public function initThumb(){
|
||||
if($this->scale){
|
||||
if($this->sourceWidth > $this->sourceHeight){
|
||||
$this->thumbWidth = $this->maxWidth;
|
||||
$this->thumbHeight = floor($this->sourceHeight*($this->maxWidth/$this->sourceWidth));
|
||||
}elseif($this->sourceWidth < $this->sourceHeight){
|
||||
$this->thumbHeight = $this->maxHeight;
|
||||
$this->thumbWidth = floor($this->sourceWidth*($this->maxHeight/$this->sourceHeight));
|
||||
}else{
|
||||
$this->thumbWidth = $this->maxWidth;
|
||||
$this->thumbHeight = $this->maxHeight;
|
||||
}
|
||||
}
|
||||
|
||||
if($this->sourceWidth <= $this->maxWidth && $this->sourceHeight <= $this->maxHeight && $this->inflate == FALSE){
|
||||
$this->thumb = NULL;
|
||||
}else{
|
||||
$this->thumb = imagecreatetruecolor($this->thumbWidth, $this->thumbHeight);
|
||||
if($this->sourceMime == 'image/png' || $this->sourceMime == 'image/gif')
|
||||
{
|
||||
|
||||
imagealphablending($this->thumb, true);
|
||||
imagesavealpha($this->thumb, true);
|
||||
if($this->sourceMime == 'image/gif')
|
||||
{
|
||||
$bgcolor=imagecolorallocate($this->thumb,0,0,0);
|
||||
$transparent = imagecolortransparent($this->thumb,$bgcolor) ;
|
||||
}
|
||||
if($this->sourceMime == 'image/png')
|
||||
{
|
||||
$transparent = imagecolorallocatealpha($this->thumb, 0, 0, 0, 127);
|
||||
}
|
||||
imagefill($this->thumb, 0, 0, $transparent);
|
||||
}
|
||||
imagecopyresampled($this->thumb, $this->source, 0, 0, 0, 0, $this->thumbWidth, $this->thumbHeight, $this->sourceWidth, $this->sourceHeight);
|
||||
}
|
||||
}
|
||||
|
||||
public function getMine(){
|
||||
return $this->sourceMime;
|
||||
}
|
||||
|
||||
public function getThumbWidth(){
|
||||
return $this->thumbWidth;
|
||||
}
|
||||
|
||||
public function getThumbHeight(){
|
||||
return $this->thumbHeight;
|
||||
}
|
||||
|
||||
static function cut($source_path, $target_width, $target_height){
|
||||
$source_info = getimagesize($source_path);
|
||||
$source_width = $source_info[0];
|
||||
$source_height = $source_info[1];
|
||||
$source_mime = $source_info['mime'];
|
||||
$source_ratio = $source_height / $source_width;
|
||||
$target_ratio = $target_height / $target_width;
|
||||
|
||||
// 源图过高
|
||||
if ($source_ratio > $target_ratio)
|
||||
{
|
||||
$cropped_width = $source_width;
|
||||
$cropped_height = $source_width * $target_ratio;
|
||||
$source_x = 0;
|
||||
$source_y = ($source_height - $cropped_height) / 2;
|
||||
}
|
||||
// 源图过宽
|
||||
elseif ($source_ratio < $target_ratio)
|
||||
{
|
||||
$cropped_width = $source_height / $target_ratio;
|
||||
$cropped_height = $source_height;
|
||||
$source_x = ($source_width - $cropped_width) / 2;
|
||||
$source_y = 0;
|
||||
}
|
||||
// 源图适中
|
||||
else
|
||||
{
|
||||
$cropped_width = $source_width;
|
||||
$cropped_height = $source_height;
|
||||
$source_x = 0;
|
||||
$source_y = 0;
|
||||
}
|
||||
|
||||
switch ($source_mime)
|
||||
{
|
||||
case 'image/gif':
|
||||
$source_image = imagecreatefromgif($source_path);
|
||||
break;
|
||||
|
||||
case 'image/jpeg':
|
||||
$source_image = imagecreatefromjpeg($source_path);
|
||||
break;
|
||||
|
||||
case 'image/png':
|
||||
$source_image = imagecreatefrompng($source_path);
|
||||
break;
|
||||
|
||||
default:
|
||||
return false;
|
||||
break;
|
||||
}
|
||||
|
||||
$target_image = imagecreatetruecolor($target_width, $target_height);
|
||||
$cropped_image = imagecreatetruecolor($cropped_width, $cropped_height);
|
||||
|
||||
// 裁剪
|
||||
imagecopy($cropped_image, $source_image, 0, 0, $source_x, $source_y, $cropped_width, $cropped_height);
|
||||
// 缩放
|
||||
imagecopyresampled($target_image, $cropped_image, 0, 0, 0, 0, $target_width, $target_height, $cropped_width, $cropped_height);
|
||||
|
||||
header('Content-Type: image/jpeg');
|
||||
imagejpeg($target_image);
|
||||
imagedestroy($source_image);
|
||||
imagedestroy($target_image);
|
||||
imagedestroy($cropped_image);
|
||||
}//cute
|
||||
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue