diff options
Diffstat (limited to 'system/libraries/drivers/Image/GD.php')
| -rw-r--r-- | system/libraries/drivers/Image/GD.php | 69 |
1 files changed, 54 insertions, 15 deletions
diff --git a/system/libraries/drivers/Image/GD.php b/system/libraries/drivers/Image/GD.php index be2af4e2..6ffffe8a 100644 --- a/system/libraries/drivers/Image/GD.php +++ b/system/libraries/drivers/Image/GD.php @@ -2,12 +2,12 @@ /** * GD Image Driver. * - * $Id: GD.php 3769 2008-12-15 00:48:56Z zombor $ + * $Id: GD.php 4679 2009-11-10 01:45:52Z isaiah $ * * @package Image * @author Kohana Team - * @copyright (c) 2007-2008 Kohana Team - * @license http://kohanaphp.com/license.html + * @copyright (c) 2007-2009 Kohana Team + * @license http://kohanaphp.com/license */ class Image_GD_Driver extends Image_Driver { @@ -20,17 +20,17 @@ class Image_GD_Driver extends Image_Driver { { // Make sure that GD2 is available if ( ! function_exists('gd_info')) - throw new Kohana_Exception('image.gd.requires_v2'); + throw new Kohana_Exception('The Image library requires GD2. Please see http://php.net/gd_info for more information.'); // Get the GD information $info = gd_info(); // Make sure that the GD2 is installed if (strpos($info['GD Version'], '2.') === FALSE) - throw new Kohana_Exception('image.gd.requires_v2'); + throw new Kohana_Exception('The Image library requires GD2. Please see http://php.net/gd_info for more information.'); } - public function process($image, $actions, $dir, $file, $render = FALSE) + public function process($image, $actions, $dir, $file, $render = FALSE, $background = NULL) { // Set the "create" function switch ($image['type']) @@ -63,11 +63,11 @@ class Image_GD_Driver extends Image_Driver { // Make sure the image type is supported for import if (empty($create) OR ! function_exists($create)) - throw new Kohana_Exception('image.type_not_allowed', $image['file']); + throw new Kohana_Exception('The specified image, :type:, is not an allowed image type.', array(':type:' => $image['file'])); // Make sure the image type is supported for saving if (empty($save) OR ! function_exists($save)) - throw new Kohana_Exception('image.type_not_allowed', $dir.$file); + throw new Kohana_Exception('The specified image, :type:, is not an allowed image type.', array(':type:' => $dir.$file)); // Load the image $this->image = $image; @@ -211,11 +211,11 @@ class Image_GD_Driver extends Image_Driver { // Recalculate the percentage to a pixel size $properties['height'] = round($height * (substr($properties['height'], 0, -1) / 100)); } - + // Recalculate the width and height, if they are missing empty($properties['width']) and $properties['width'] = round($width * $properties['height'] / $height); empty($properties['height']) and $properties['height'] = round($height * $properties['width'] / $width); - + if ($properties['master'] === Image::AUTO) { // Change an automatic master dim to the correct type @@ -314,7 +314,7 @@ class Image_GD_Driver extends Image_Driver { { // Make sure that the sharpening function is available if ( ! function_exists('imageconvolution')) - throw new Kohana_Exception('image.unsupported_method', __FUNCTION__); + throw new Kohana_Exception('Your configured driver does not support the :method: image transformation.', array(':method:' => __FUNCTION__)); // Amount should be in the range of 18-10 $amount = round(abs(-18 + ($amount * 0.08)), 2); @@ -336,23 +336,52 @@ class Image_GD_Driver extends Image_Driver { switch($properties['mime']) { case "image/jpeg": - $overlay_img = imagecreatefromjpeg($properties['overlay_file']); + $overlay_img = imagecreatefromjpeg($properties['overlay_file']); break; case "image/gif": - $overlay_img = imagecreatefromgif($properties['overlay_file']); + $overlay_img = imagecreatefromgif($properties['overlay_file']); break; case "image/png": - $overlay_img = imagecreatefrompng($properties['overlay_file']); + $overlay_img = imagecreatefrompng($properties['overlay_file']); break; } - imagecopymerge($this->tmp_image, $overlay_img, $properties['x'], $properties['y'], 0, 0, imagesx($overlay_img), imagesy($overlay_img), $properties['transparency']); + $this->imagecopymerge_alpha($this->tmp_image, $overlay_img, $properties['x'], $properties['y'], 0, 0, imagesx($overlay_img), imagesy($overlay_img), $properties['transparency']); + imagedestroy($overlay_img); + return TRUE; } + /** + * A replacement for php's imagecopymerge() function that supports the alpha channel + * See php bug #23815: http://bugs.php.net/bug.php?id=23815 + * + * @param resource $dst_im Destination image link resource + * @param resource $src_im Source image link resource + * @param integer $dst_x x-coordinate of destination point + * @param integer $dst_y y-coordinate of destination point + * @param integer $src_x x-coordinate of source point + * @param integer $src_y y-coordinate of source point + * @param integer $src_w Source width + * @param integer $src_h Source height + * @param integer $pct Transparency percent (0 to 100) + */ + protected function imagecopymerge_alpha($dst_im, $src_im, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h, $pct) + { + // Create a new blank image the site of our source image + $cut = imagecreatetruecolor($src_w, $src_h); + + // Copy the blank image into the destination image where the source goes + imagecopy($cut, $dst_im, 0, 0, $dst_x, $dst_y, $src_w, $src_h); + + // Place the source image in the destination image + imagecopy($cut, $src_im, 0, 0, $src_x, $src_y, $src_w, $src_h); + imagecopymerge($dst_im, $cut, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h, $pct); + } + protected function properties() { return array(imagesx($this->tmp_image), imagesy($this->tmp_image)); @@ -368,6 +397,16 @@ class Image_GD_Driver extends Image_Driver { */ protected function imagecreatetransparent($width, $height) { + if ($width < 1) + { + $width = 1; + } + + if ($height < 1) + { + $height = 1; + } + if (self::$blank_png === NULL) { // Decode the blank PNG if it has not been done already |