PHP中使用Imagick实现各种图片效果实例(5)

<?php 
//获取水印图片 
$logo = new Imagick("logo.png"); 
$logo->setImageResolution(0.01,0.03); 
 
//创建一个Imagick对象，同时获取要处理的源图 
$im = new Imagick( "old_large_img_2.jpg" ); 
 
//获取源图片宽和高 
$srcWH = $im->getImageGeometry(); 
 
//图片等比例缩放宽和高设置 
if($srcWH['width']>710){ 
$srcW['width'] = 710; 
$srcH['height'] = $srcW['width']/$srcWH['width']*$srcWH['height']; 
}else{ 
$srcW['width'] = $srcWH['width']; 
$srcH['height'] = $srcWH['height']; 
} 
 
//按照比例进行缩放 
$im->thumbnailImage( $srcW['width'], $srcH['height'], true ); 
 
// 按照缩略图大小创建一个有颜色的图片 
$canvas = new Imagick(); 
$canvas->newImage( $srcW['width'], $srcH['height'], 'black', 'jpg' ); //pink,black 
 
//添加水印 
$im->compositeImage($logo,Imagick::COMPOSITE_OVER,$srcW['width']-280,$srcH['height']-77); 
$canvas->setcompressionquality(91); 
//合并图片 
$canvas->compositeImage( $im, imagick::COMPOSITE_OVER, 0, 0); 
 
//输出图片 
header( "Content-Type: image/jpg" ); 
echo $canvas;   
 
//生成图片 
$canvas->writeImage( "test_img/old_large_img_2_96.jpg" ); 
?> 

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