phpimagick完美实现图片裁切、生成缩略图、添加水印

本文实例讲解了php使用imagick 裁切、生成缩略图、添加水印自动检测和处理,支持gif,分享给大家供大家参考,具体内容如下

调用方式:

include ‘imagick.class.php’;
$image = new lib_image_imagick();
$image->open(‘a.gif’);
$image->resize_to(100, 100, ‘scale_fill’);
$image->add_text(‘1024i.com’, 10, 20);
$image->add_watermark(‘1024i.gif’, 10, 50);
$image->save_to(‘x.gif’);

imagick.class.php

image!==null) $this->image->destroy();
}
// 载入图像
public function open($path)
{
$this->image = new imagick( $path );
if($this->image)
{
$this->type = strtolower($this->image->getimageformat());
}
return $this->image;
}
public function crop($x=0, $y=0, $width=null, $height=null)
{
if($width==null) $width = $this->image->getimagewidth()-$x;
if($height==null) $height = $this->image->getimageheight()-$y;
if($widthimage;
$canvas = new imagick();
$images = $image->coalesceimages();
foreach($images as $frame){
$img = new imagick();
$img->readimageblob($frame);
$img->cropimage($width, $height, $x, $y);
$canvas->addimage( $img );
$canvas->setimagedelay( $img->getimagedelay() );
$canvas->setimagepage($width, $height, 0, 0);
}
$image->destroy();
$this->image = $canvas;
}
else
{
$this->image->cropimage($width, $height, $x, $y);
}
}
/*
* 更改图像大小
$fit: 适应大小方式
‘force’: 把图片强制变形成 $width x $height 大小
‘scale’: 按比例在安全框 $width x $height 内缩放图片, 输出缩放后图像大小 不完全等于 $width x $height
‘scale_fill’: 按比例在安全框 $width x $height 内缩放图片,安全框内没有像素的地方填充色, 使用此参数时可设置背景填充色 $bg_color = array(255,255,255)(红,绿,蓝, 透明度) 透明度(0不透明-127完全透明))
其它: 智能模能 缩放图像并载取图像的中间部分 $width x $height 像素大小
$fit = ‘force’,’scale’,’scale_fill’ 时: 输出完整图像
$fit = 图像方位值 时, 输出指定位置部分图像
字母与图像的对应关系如下:
north_west north north_east
west center east
south_west south south_east
*/
public function resize_to($width = 100, $height = 100, $fit = ‘center’, $fill_color = array(255,255,255,0) )
{
switch($fit)
{
case ‘force’:
if($this->type==’gif’)
{
$image = $this->image;
$canvas = new imagick();
$images = $image->coalesceimages();
foreach($images as $frame){
$img = new imagick();
$img->readimageblob($frame);
$img->thumbnailimage( $width, $height, false );
$canvas->addimage( $img );
$canvas->setimagedelay( $img->getimagedelay() );
}
$image->destroy();
$this->image = $canvas;
}
else
{
$this->image->thumbnailimage( $width, $height, false );
}
break;
case ‘scale’:
if($this->type==’gif’)
{
$image = $this->image;
$images = $image->coalesceimages();
$canvas = new imagick();
foreach($images as $frame){
$img = new imagick();
$img->readimageblob($frame);
$img->thumbnailimage( $width, $height, true );
$canvas->addimage( $img );
$canvas->setimagedelay( $img->getimagedelay() );
}
$image->destroy();
$this->image = $canvas;
}
else
{
$this->image->thumbnailimage( $width, $height, true );
}
break;
case ‘scale_fill’:
$size = $this->image->getimagepage();
$src_width = $size[‘width’];
$src_height = $size[‘height’];
$x = 0;
$y = 0;
$dst_width = $width;
$dst_height = $height;
if($src_width*$height > $src_height*$width)
{
$dst_height = intval($width*$src_height/$src_width);
$y = intval( ($height-$dst_height)/2 );
}
else
{
$dst_width = intval($height*$src_width/$src_height);
$x = intval( ($width-$dst_width)/2 );
}
$image = $this->image;
$canvas = new imagick();
$color = ‘rgba(‘.$fill_color[0].’,’.$fill_color[1].’,’.$fill_color[2].’,’.$fill_color[3].’)’;
if($this->type==’gif’)
{
$images = $image->coalesceimages();
foreach($images as $frame)
{
$frame->thumbnailimage( $width, $height, true );
$draw = new imagickdraw();
$draw->composite($frame->getimagecompose(), $x, $y, $dst_width, $dst_height, $frame);
$img = new imagick();
$img->newimage($width, $height, $color, ‘gif’);
$img->drawimage($draw);
$canvas->addimage( $img );
$canvas->setimagedelay( $img->getimagedelay() );
$canvas->setimagepage($width, $height, 0, 0);
}
}
else
{
$image->thumbnailimage( $width, $height, true );
$draw = new imagickdraw();
$draw->composite($image->getimagecompose(), $x, $y, $dst_width, $dst_height, $image);
$canvas->newimage($width, $height, $color, $this->get_type() );
$canvas->drawimage($draw);
$canvas->setimagepage($width, $height, 0, 0);
}
$image->destroy();
$this->image = $canvas;
break;
default:
$size = $this->image->getimagepage();
$src_width = $size[‘width’];
$src_height = $size[‘height’];
$crop_x = 0;
$crop_y = 0;
$crop_w = $src_width;
$crop_h = $src_height;
if($src_width*$height > $src_height*$width)
{
$crop_w = intval($src_height*$width/$height);
}
else
{
$crop_h = intval($src_width*$height/$width);
}
switch($fit)
{
case ‘north_west’:
$crop_x = 0;
$crop_y = 0;
break;
case ‘north’:
$crop_x = intval( ($src_width-$crop_w)/2 );
$crop_y = 0;
break;
case ‘north_east’:
$crop_x = $src_width-$crop_w;
$crop_y = 0;
break;
case ‘west’:
$crop_x = 0;
$crop_y = intval( ($src_height-$crop_h)/2 );
break;
case ‘center’:
$crop_x = intval( ($src_width-$crop_w)/2 );
$crop_y = intval( ($src_height-$crop_h)/2 );
break;
case ‘east’:
$crop_x = $src_width-$crop_w;
$crop_y = intval( ($src_height-$crop_h)/2 );
break;
case ‘south_west’:
$crop_x = 0;
$crop_y = $src_height-$crop_h;
break;
case ‘south’:
$crop_x = intval( ($src_width-$crop_w)/2 );
$crop_y = $src_height-$crop_h;
break;
case ‘south_east’:
$crop_x = $src_width-$crop_w;
$crop_y = $src_height-$crop_h;
break;
default:
$crop_x = intval( ($src_width-$crop_w)/2 );
$crop_y = intval( ($src_height-$crop_h)/2 );
}
$image = $this->image;
$canvas = new imagick();
if($this->type==’gif’)
{
$images = $image->coalesceimages();
foreach($images as $frame){
$img = new imagick();
$img->readimageblob($frame);
$img->cropimage($crop_w, $crop_h, $crop_x, $crop_y);
$img->thumbnailimage( $width, $height, true );
$canvas->addimage( $img );
$canvas->setimagedelay( $img->getimagedelay() );
$canvas->setimagepage($width, $height, 0, 0);
}
}
else
{
$image->cropimage($crop_w, $crop_h, $crop_x, $crop_y);
$image->thumbnailimage( $width, $height, true );
$canvas->addimage( $image );
$canvas->setimagepage($width, $height, 0, 0);
}
$image->destroy();
$this->image = $canvas;
}
}
// 添加水印图片
public function add_watermark($path, $x = 0, $y = 0)
{
$watermark = new imagick($path);
$draw = new imagickdraw();
$draw->composite($watermark->getimagecompose(), $x, $y, $watermark->getimagewidth(), $watermark->getimageheight(), $watermark);
if($this->type==’gif’)
{
$image = $this->image;
$canvas = new imagick();
$images = $image->coalesceimages();
foreach($image as $frame)
{
$img = new imagick();
$img->readimageblob($frame);
$img->drawimage($draw);
$canvas->addimage( $img );
$canvas->setimagedelay( $img->getimagedelay() );
}
$image->destroy();
$this->image = $canvas;
}
else
{
$this->image->drawimage($draw);
}
}
// 添加水印文字
public function add_text($text, $x = 0 , $y = 0, $angle=0, $style=array())
{
$draw = new imagickdraw();
if(isset($style[‘font’])) $draw->setfont($style[‘font’]);
if(isset($style[‘font_size’])) $draw->setfontsize($style[‘font_size’]);
if(isset($style[‘fill_color’])) $draw->setfillcolor($style[‘fill_color’]);
if(isset($style[‘under_color’])) $draw->settextundercolor($style[‘under_color’]);
if($this->type==’gif’)
{
foreach($this->image as $frame)
{
$frame->annotateimage($draw, $x, $y, $angle, $text);
}
}
else
{
$this->image->annotateimage($draw, $x, $y, $angle, $text);
}
}
// 保存到指定路径
public function save_to( $path )
{
if($this->type==’gif’)
{
$this->image->writeimages($path, true);
}
else
{
$this->image->writeimage($path);
}
}
// 输出图像
public function output($header = true)
{
if($header) header(‘content-type: ‘.$this->type);
echo $this->image->getimagesblob();
}
public function get_width()
{
$size = $this->image->getimagepage();
return $size[‘width’];
}
public function get_height()
{
$size = $this->image->getimagepage();
return $size[‘height’];
}
// 设置图像类型, 默认与源类型一致
public function set_type( $type=’png’ )
{
$this->type = $type;
$this->image->setimageformat( $type );
}
// 获取源图像类型
public function get_type()
{
return $this->type;
}
// 当前对象是否为图片
public function is_image()
{
if( $this->image )
return true;
else
return false;
}
public function thumbnail($width = 100, $height = 100, $fit = true){ $this->image->thumbnailimage( $width, $height, $fit );} // 生成缩略图 $fit为真时将保持比例并在安全框 $width x $height 内生成缩略图片
/*
添加一个边框
$width: 左右边框宽度
$height: 上下边框宽度
$color: 颜色: rgb 颜色 ‘rgb(255,0,0)’ 或 16进制颜色 ‘#ff0000’ 或颜色单词 ‘white’/’red’…
*/
public function border($width, $height, $color=’rgb(220, 220, 220)’)
{
$color=new imagickpixel();
$color->setcolor($color);
$this->image->borderimage($color, $width, $height);
}
public function blur($radius, $sigma){$this->image->blurimage($radius, $sigma);} // 模糊
public function gaussian_blur($radius, $sigma){$this->image->gaussianblurimage($radius, $sigma);} // 高斯模糊
public function motion_blur($radius, $sigma, $angle){$this->image->motionblurimage($radius, $sigma, $angle);} // 运动模糊
public function radial_blur($radius){$this->image->radialblurimage($radius);} // 径向模糊
public function add_noise($type=null){$this->image->addnoiseimage($type==null?imagick::noise_impulse:$type);} // 添加噪点
public function level($black_point, $gamma, $white_point){$this->image->levelimage($black_point, $gamma, $white_point);} // 调整色阶
public function modulate($brightness, $saturation, $hue){$this->image->modulateimage($brightness, $saturation, $hue);} // 调整亮度、饱和度、色调
public function charcoal($radius, $sigma){$this->image->charcoalimage($radius, $sigma);} // 素描
public function oil_paint($radius){$this->image->oilpaintimage($radius);} // 油画效果
public function flop(){$this->image->flopimage();} // 水平翻转
public function flip(){$this->image->flipimage();} // 垂直翻转
}

希望本文所述对大家学习php程序设计有所帮助。

以上就介绍了php imagick完美实现图片裁切、生成缩略图、添加水印,包括了方面的内容,希望对php教程有兴趣的朋友有所帮助。

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