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Diffstat (limited to 'system/libraries/drivers/Image.php')
| -rw-r--r-- | system/libraries/drivers/Image.php | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/system/libraries/drivers/Image.php b/system/libraries/drivers/Image.php new file mode 100644 index 00000000..f89ba953 --- /dev/null +++ b/system/libraries/drivers/Image.php @@ -0,0 +1,156 @@ +<?php defined('SYSPATH') OR die('No direct access allowed.'); +/** + * Image API driver. + * + * $Id: Image.php 3769 2008-12-15 00:48:56Z zombor $ + * + * @package Image + * @author Kohana Team + * @copyright (c) 2007-2008 Kohana Team + * @license http://kohanaphp.com/license.html + */ +abstract class Image_Driver { + + // Reference to the current image + protected $image; + + // Reference to the temporary processing image + protected $tmp_image; + + // Processing errors + protected $errors = array(); + + /** + * Executes a set of actions, defined in pairs. + * + * @param array actions + * @return boolean + */ + public function execute($actions) + { + foreach ($actions as $func => $args) + { + if ( ! $this->$func($args)) + return FALSE; + } + + return TRUE; + } + + /** + * Sanitize and normalize a geometry array based on the temporary image + * width and height. Valid properties are: width, height, top, left. + * + * @param array geometry properties + * @return void + */ + protected function sanitize_geometry( & $geometry) + { + list($width, $height) = $this->properties(); + + // Turn off error reporting + $reporting = error_reporting(0); + + // Width and height cannot exceed current image size + $geometry['width'] = min($geometry['width'], $width); + $geometry['height'] = min($geometry['height'], $height); + + // Set standard coordinates if given, otherwise use pixel values + if ($geometry['top'] === 'center') + { + $geometry['top'] = floor(($height / 2) - ($geometry['height'] / 2)); + } + elseif ($geometry['top'] === 'top') + { + $geometry['top'] = 0; + } + elseif ($geometry['top'] === 'bottom') + { + $geometry['top'] = $height - $geometry['height']; + } + + // Set standard coordinates if given, otherwise use pixel values + if ($geometry['left'] === 'center') + { + $geometry['left'] = floor(($width / 2) - ($geometry['width'] / 2)); + } + elseif ($geometry['left'] === 'left') + { + $geometry['left'] = 0; + } + elseif ($geometry['left'] === 'right') + { + $geometry['left'] = $width - $geometry['height']; + } + + // Restore error reporting + error_reporting($reporting); + } + + /** + * Return the current width and height of the temporary image. This is mainly + * needed for sanitizing the geometry. + * + * @return array width, height + */ + abstract protected function properties(); + + /** + * Process an image with a set of actions. + * + * @param string image filename + * @param array actions to execute + * @param string destination directory path + * @param string destination filename + * @return boolean + */ + abstract public function process($image, $actions, $dir, $file); + + /** + * Flip an image. Valid directions are horizontal and vertical. + * + * @param integer direction to flip + * @return boolean + */ + abstract function flip($direction); + + /** + * Crop an image. Valid properties are: width, height, top, left. + * + * @param array new properties + * @return boolean + */ + abstract function crop($properties); + + /** + * Resize an image. Valid properties are: width, height, and master. + * + * @param array new properties + * @return boolean + */ + abstract public function resize($properties); + + /** + * Rotate an image. Valid amounts are -180 to 180. + * + * @param integer amount to rotate + * @return boolean + */ + abstract public function rotate($amount); + + /** + * Sharpen and image. Valid amounts are 1 to 100. + * + * @param integer amount to sharpen + * @return boolean + */ + abstract public function sharpen($amount); + + /** + * Overlay a second image. Valid properties are: overlay_file, mime, x, y and transparency. + * + * @return boolean + */ + abstract public function composite($properties); + +} // End Image Driver
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