php图片处理类：缩略，裁剪，圆角，倾斜

<?php

/*

图片处理类：缩略，裁剪，圆角，倾斜

*/

class resizeimage

{

//图片类型

var $type;

//实际宽度

var $width;

//实际高度

var $height;

//改变后的宽度

var $resize_width;

//改变后的高度

var $resize_height;

//是否裁图

var $cut;

//源图象

var $srcimg;

//目标图象地址

var $dstimg;

//圆角源

var $corner;

var $im;

function resizeimage($img, $corner, $wid, $hei,$c, $corner_radius, $angle)

{

$this->srcimg = $img;

$this->corner = $corner;

$this->resize_width = $wid;

$this->resize_height = $hei;

$this->cut = $c;

$this->corner_radius = $corner_radius;

$this->angle = $angle;

//图片的类型

$this->type = substr(strrchr($this->srcimg,"."),1);

//初始化图象

$this->initi_img();

//目标图象地址

$this -> dst_img();

//--

$this->width = imagesx($this->im);

$this->height = imagesy($this->im);

//生成图象

$this->newimg();

ImageDestroy ($this->im);

}

function newimg()

{

//改变后的图象的比例

$resize_ratio = ($this->resize_width)/($this->resize_height);

//实际图象的比例

$ratio = ($this->width)/($this->height);

if(($this->cut)=="1")

//裁图

{

if($ratio>=$resize_ratio)

//高度优先

{

$newimg = imagecreatetruecolor($this->resize_width,$this->resize_height);

imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, $this->resize_width,$this->resize_height, (($this->height)*$resize_ratio), $this->height);

$tmp = $this->rounded_corner($newimg,$this->resize_width);

imagepng ($tmp,$this->dstimg);

}

if($ratio<$resize_ratio)

//宽度优先

{

$newimg = imagecreatetruecolor($this->resize_width,$this->resize_height);

imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, $this->resize_width, $this->resize_height, $this->width, (($this->width)/$resize_ratio));

$tmp = $this->rounded_corner($newimg);

imagepng ($tmp,$this->dstimg);

}

}

else

//不裁图

{

if($ratio>=$resize_ratio)

{

$newimg = imagecreatetruecolor($this->resize_width,($this->resize_width)/$ratio);

imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, $this->resize_width, ($this->resize_width)/$ratio, $this->width, $this->height);

ImageJpeg ($newimg,$this->dstimg);

}

if($ratio<$resize_ratio)

{

$newimg = imagecreatetruecolor(($this->resize_height)*$ratio,$this->resize_height);

imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, ($this->resize_height)*$ratio, $this->resize_height, $this->width, $this->height);

ImageJpeg ($newimg,$this->dstimg);

}

}

}

//初始化图象

function initi_img()

{

if($this->type=="jpg")

{

$this->im = imagecreatefromjpeg($this->srcimg);

}

if($this->type=="gif")

{

$this->im = imagecreatefromgif($this->srcimg);

}

if($this->type=="png")

{

$this->im = imagecreatefrompng($this->srcimg);

}

}

//处理圆角

function rounded_corner($image,$size)

{

$this->angle = 0;

$topleft = true;

$bottomleft = true;

$bottomright = true;

$topright = true;

$corner_source = imagecreatefrompng('rounded_corner.png');

$corner_width = imagesx($corner_source);

$corner_height = imagesy($corner_source);

$corner_resized = ImageCreateTrueColor($this->corner_radius, $this->corner_radius);

ImageCopyResampled($corner_resized, $corner_source, 0, 0, 0, 0, $this->corner_radius, $this->corner_radius, $corner_width, $corner_height);

$corner_width = imagesx($corner_resized);

$corner_height = imagesy($corner_resized);

$white = ImageColorAllocate($image,255,255,255);

$black = ImageColorAllocate($image,0,0,0);

//顶部左圆角

if ($topleft == true) {

$dest_x = 0;

$dest_y = 0;

imagecolortransparent($corner_resized, $black);

imagecopymerge($image, $corner_resized, $dest_x, $dest_y, 0, 0, $corner_width, $corner_height, 100);

}

//下部左圆角

if ($bottomleft == true) {

$dest_x = 0;

$dest_y = $size - $corner_height;

$rotated = imagerotate($corner_resized, 90, 0);

imagecolortransparent($rotated, $black);

imagecopymerge($image, $rotated, $dest_x, $dest_y, 0, 0, $corner_width, $corner_height, 100);

}

//下部右圆角

if ($bottomright == true) {

$dest_x = $size - $corner_width;

$dest_y = $size - $corner_height;

$rotated = imagerotate($corner_resized, 180, 0);

imagecolortransparent($rotated, $black);

imagecopymerge($image, $rotated, $dest_x, $dest_y, 0, 0, $corner_width, $corner_height, 100);

}

//顶部右圆角

if ($topright == true) {

$dest_x = $size - $corner_width;

$dest_y = 0;

$rotated = imagerotate($corner_resized, 270, 0);

imagecolortransparent($rotated, $black);

imagecopymerge($image, $rotated, $dest_x, $dest_y, 0, 0, $corner_width, $corner_height, 100);

}

$image = imagerotate($image, $this->angle, $white);

return $image;

}

//图象目标地址

function dst_img()

{

$full_length = strlen($this->srcimg);

$type_length = strlen($this->type);

$name_length = $full_length-$type_length;

$name = substr($this->srcimg,0,$name_length-1);

$this->dstimg = $name."_small.png";

}

}

//resizeimage("图片地址", "处理后的宽度", "处理后的高度", "是否裁剪", "圆角度数", "倾斜度");

$img_file = 'Sunset.jpg';

$corner = 'rounded_corner.png';

$resizeimage = new resizeimage($img_file, $corner, "80", "80", "1", "6", "0");

?>

<img src="Sunset_small.png" >