Re: [PEAR-CVS] cvs: pear /Image_Transform/Driver Cairowrapper.php

Hi,

What's the point in the Cairo driver ?
Given Cairo is a image drawing lib not manipulation.

- Helgi

On Mon, Apr 28, 2008 at 8:58 PM, Christian Weiske <[email protected]> wrote:
> cweiske         Mon Apr 28 20:58:37 2008 UTC
>
>   Added files:
>     /pear/Image_Transform/Driver        Cairowrapper.php
>   Log:
>   First version of a cairo driver for Image_Transform. Uses pecl cairo_wrapper
>   extension and can resize/scale only yet.
>
>
>
>  http://cvs.php.net/viewvc.cgi/pear/Image_Transform/Driver/Cairowrapper.php?view=markup&rev=1.1
>  Index: pear/Image_Transform/Driver/Cairowrapper.php
>  +++ pear/Image_Transform/Driver/Cairowrapper.php
>  <?php
>  /* vim: set expandtab tabstop=4 shiftwidth=4: */
>
>  /**
>   * Cairo implementation for Image_Transform package
>   *
>   * PHP versions 4 and 5
>   *
>   * LICENSE: This source file is subject to version 3.0 of the PHP license
>   * that is available through the world-wide-web at the following URI:
>   * http://www.php.net/license/3_0.txt.  If you did not receive a copy of
>   * the PHP License and are unable to obtain it through the web, please
>   * send a note to [email protected] so we can mail you a copy immediately.
>   *
>   * @category   Image
>   * @package    Image_Transform
>   * @subpackage Image_Transform_Driver_GD
>   * @author     Christian Weiske <[email protected]>
>   * @copyright  2008 The PHP Group
>   * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
>   * @version    CVS: $Id: Cairowrapper.php,v 1.1 2008/04/28 20:58:37 cweiske Exp $
>   * @link       http://pear.php.net/package/Image_Transform
>   */
>  require_once 'Image/Transform.php';
>
>  /**
>   * Cairo implementation for Image_Transform package using pecl's cairo_wrapper
>   * extension.
>   *
>   * @category   Image
>   * @package    Image_Transform
>   * @subpackage Image_Transform_Driver_Cairowrapper
>   * @author     Christian Weiske <[email protected]>
>   * @copyright  2008 The PHP Group
>   * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
>   * @version    Release: @package_version@
>   * @link       http://pear.php.net/package/Image_Transform
>   */
>  class Image_Transform_Driver_Cairowrapper extends Image_Transform
>  {
>     var $surface = null;
>
>     /**
>      * Supported image types
>      * @var array
>      * @access protected
>      */
>     var $_supported_image_types = array(
>         'png' => 'rw'
>     );
>
>     /**
>      * Check settings
>      */
>     function Image_Transform_Driver_Cairowrapper()
>     {
>         $this->__construct();
>     }
>
>
>
>     /**
>      * Check settings
>      *
>      * @since PHP 5
>      */
>     function __construct()
>     {
>         if (!PEAR::loadExtension('cairo_wrapper')) {
>             $this->isError(PEAR::raiseError("cairo_wrapper extension is not available.",
>                 IMAGE_TRANSFORM_ERROR_UNSUPPORTED));
>         }
>     }
>
>
>
>     /**
>      * Loads an image from file
>      *
>      * @param string $image filename
>      *
>      * @return bool|PEAR_Error TRUE or a PEAR_Error object on error
>      *
>      * @access public
>      */
>     function load($image)
>     {
>         $this->free();
>
>         $this->image = $image;
>         $result = $this->_get_image_details($image);
>         if (PEAR::isError($result)) {
>             return $result;
>         }
>         if (!$this->supportsType($this->type, 'r')) {
>             return PEAR::raiseError('Image type not supported for input',
>                 IMAGE_TRANSFORM_ERROR_UNSUPPORTED);
>         }
>
>         $this->surface = cairo_image_surface_create_from_png($this->image);
>         if (cairo_surface_status($this->surface) != CAIRO_STATUS_SUCCESS) {
>             $this->surface = null;
>             return PEAR::raiseError('Error while loading image file.',
>                 IMAGE_TRANSFORM_ERROR_IO);
>         }
>
>         return true;
>     }//function load(..)
>
>
>
>     /**
>      * Resize the image
>      *
>      * @param int   $new_x   New width
>      * @param int   $new_y   New height
>      * @param array $options Optional parameters
>      *
>      * @return bool|PEAR_Error TRUE on success or PEAR_Error object on error
>      *
>      * @access protected
>      */
>     function _resize($new_x, $new_y, $options = null)
>     {
>         if ($this->resized === true) {
>             return PEAR::raiseError(
>                 'You have already resized the image without saving it.'
>                 . ' Your previous resizing will be overwritten',
>                 null, PEAR_ERROR_TRIGGER, E_USER_NOTICE
>             );
>         }
>
>         if ($this->new_x == $new_x && $this->new_y == $new_y) {
>             return true;
>         }
>
>         $xFactor = $new_x / $this->img_x;
>         $yFactor = $new_y / $this->img_y;
>
>         $outputSurface = cairo_image_surface_create(
>             CAIRO_FORMAT_ARGB32, $new_x, $new_y
>         );
>         $outputContext = cairo_create($outputSurface);
>
>         cairo_scale($outputContext, $xFactor, $yFactor);
>
>         $inputContext = cairo_create($this->surface);
>         cairo_set_source_surface($outputContext, $this->surface, 0, 0);
>         cairo_paint($outputContext);
>
>         cairo_destroy($outputContext);
>         cairo_destroy($inputContext);
>
>         cairo_surface_destroy($this->surface);
>
>         $this->surface = $outputSurface;
>
>         $this->new_x = $new_x;
>         $this->new_y = $new_y;
>         return true;
>     }//function _resize(..)
>
>
>
>     function save($filename, $type = null, $quality = null)
>     {
>         cairo_surface_write_to_png($this->surface, $filename);
>         $this->free();
>     }//function save(..)
>
>
>
>     /**
>      * Frees cairo handles
>      *
>      * @return void
>      *
>      * @access public
>      */
>     function free()
>     {
>         $this->resized = false;
>         if (is_resource($this->surface)) {
>             cairo_surface_destroy($this->surface);
>         }
>         $this->surface = null;
>     }//function free()
>
>  }//class Image_Transform_Driver_Cairowrapper extends Image_Transform
>  ?>
>
>
>  --
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