3

codeigniter image libを使用して、画像タイプを変更することは可能ですか？*->PNGから変換しようとしています。

以下は動作しません！

$config = array();
$config['source_image']='uploads/'.$name.'.'.$m[1];
$config['new_image']='uploads/'.$name.'.'.$png;
$objImage = new CI_Image_lib($config);

どうもありがとう！すべてが非常に感謝しています！

現在使用しているだけですが、image libを使用し、すべての画像タイプをサポートしたいと考えています。

$sourceImage = imagecreatefromjpeg('uploads/'.$name.'.'.$m[1]);
imagepng($sourceImage, 'uploads/'.$name.'.png');
4

2 に答える 2

3

多くの異なるソリューションを読んだ後、私はCodeIgniterのライブラリをあきらめ、代わりにここで提供されている非常に単純なクラスを使用することにしました（元々はhttp://www.white-hat-web-design.co.uk/blog/resizing- に投稿されました）images-with-php /ですが、その間に削除されました）。

後世のためにここに貼り付けます：

<?php
/* * File: SimpleImage.php * Author: Simon Jarvis * Copyright: 2006 Simon Jarvis * Date: 08/11/06 * Link: http://www.white-hat-web-design.co.uk/articles/php-image-resizing.php * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details: * http://www.gnu.org/licenses/gpl.html * */
class SimpleImage
{
    var $image;
    var $image_type;
    function load($filename)
    {
        $image_info       = getimagesize($filename);
        $this->image_type = $image_info[2];
        if ($this->image_type == IMAGETYPE_JPEG) {
            $this->image = imagecreatefromjpeg($filename);
        } elseif ($this->image_type == IMAGETYPE_GIF) {
            $this->image = imagecreatefromgif($filename);
        } elseif ($this->image_type == IMAGETYPE_PNG) {
            $this->image = imagecreatefrompng($filename);
        }
    }
    function save($filename, $image_type = IMAGETYPE_JPEG, $compression = 75, $permissions = null)
    {
        if ($image_type == IMAGETYPE_JPEG) {
            imagejpeg($this->image, $filename, $compression);
        } elseif ($image_type == IMAGETYPE_GIF) {
            imagegif($this->image, $filename);
        } elseif ($image_type == IMAGETYPE_PNG) {
            imagepng($this->image, $filename);
        }
        if ($permissions != null) {
            chmod($filename, $permissions);
        }
    }
    function output($image_type = IMAGETYPE_JPEG)
    {
        if ($image_type == IMAGETYPE_JPEG) {
            imagejpeg($this->image);
        } elseif ($image_type == IMAGETYPE_GIF) {
            imagegif($this->image);
        } elseif ($image_type == IMAGETYPE_PNG) {
            imagepng($this->image);
        }
    }
    function getWidth()
    {
        return imagesx($this->image);
    }
    function getHeight()
    {
        return imagesy($this->image);
    }
    function resizeToHeight($height)
    {
        $ratio = $height / $this->getHeight();
        $width = $this->getWidth() * $ratio;
        $this->resize($width, $height);
    }
    function resizeToWidth($width)
    {
        $ratio  = $width / $this->getWidth();
        $height = $this->getheight() * $ratio;
        $this->resize($width, $height);
    }
    function scale($scale)
    {
        $width  = $this->getWidth() * $scale / 100;
        $height = $this->getheight() * $scale / 100;
        $this->resize($width, $height);
    }
    function resize($width, $height)
    {
        $new_image = imagecreatetruecolor($width, $height);
        imagecopyresampled($new_image, $this->image, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight());
        $this->image = $new_image;
    }
}
?>

CIベースの拡張機能については、こちらをご覧ください：http ://www.robertmullaney.com/2010/09/18/codeigniter-image_lib-convert-jpg-gif-png/

于 2011-10-30T22:25:20.037 に答える
0

私はあなたが使わなければならないと思いますImageMagick

$config['image_library'] = 'ImageMagick';
$config['library_path']='/usr/bin';
$config['source_image']='uploads/'.$name.'.'.$m[1];
$config['new_image']='uploads/'.$name.'.'.$png;
$objImage = new CI_Image_lib($config);
于 2011-03-19T02:17:40.810 に答える