--- /dev/null
+<?php defined('SYSPATH') OR die('No direct access allowed.');
+/**
+ * GD Image Driver.
+ *
+ * $Id: GD.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
+ */
+class Image_GD_Driver extends Image_Driver {
+
+ // A transparent PNG as a string
+ protected static $blank_png;
+ protected static $blank_png_width;
+ protected static $blank_png_height;
+
+ public function __construct()
+ {
+ // Make sure that GD2 is available
+ if ( ! function_exists('gd_info'))
+ throw new Kohana_Exception('image.gd.requires_v2');
+
+ // 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');
+ }
+
+ public function process($image, $actions, $dir, $file, $render = FALSE)
+ {
+ // Set the "create" function
+ switch ($image['type'])
+ {
+ case IMAGETYPE_JPEG:
+ $create = 'imagecreatefromjpeg';
+ break;
+ case IMAGETYPE_GIF:
+ $create = 'imagecreatefromgif';
+ break;
+ case IMAGETYPE_PNG:
+ $create = 'imagecreatefrompng';
+ break;
+ }
+
+ // Set the "save" function
+ switch (strtolower(substr(strrchr($file, '.'), 1)))
+ {
+ case 'jpg':
+ case 'jpeg':
+ $save = 'imagejpeg';
+ break;
+ case 'gif':
+ $save = 'imagegif';
+ break;
+ case 'png':
+ $save = 'imagepng';
+ break;
+ }
+
+ // Make sure the image type is supported for import
+ if (empty($create) OR ! function_exists($create))
+ throw new Kohana_Exception('image.type_not_allowed', $image['file']);
+
+ // Make sure the image type is supported for saving
+ if (empty($save) OR ! function_exists($save))
+ throw new Kohana_Exception('image.type_not_allowed', $dir.$file);
+
+ // Load the image
+ $this->image = $image;
+
+ // Create the GD image resource
+ $this->tmp_image = $create($image['file']);
+
+ // Get the quality setting from the actions
+ $quality = arr::remove('quality', $actions);
+
+ if ($status = $this->execute($actions))
+ {
+ // Prevent the alpha from being lost
+ imagealphablending($this->tmp_image, TRUE);
+ imagesavealpha($this->tmp_image, TRUE);
+
+ switch ($save)
+ {
+ case 'imagejpeg':
+ // Default the quality to 95
+ ($quality === NULL) and $quality = 95;
+ break;
+ case 'imagegif':
+ // Remove the quality setting, GIF doesn't use it
+ unset($quality);
+ break;
+ case 'imagepng':
+ // Always use a compression level of 9 for PNGs. This does not
+ // affect quality, it only increases the level of compression!
+ $quality = 9;
+ break;
+ }
+
+ if ($render === FALSE)
+ {
+ // Set the status to the save return value, saving with the quality requested
+ $status = isset($quality) ? $save($this->tmp_image, $dir.$file, $quality) : $save($this->tmp_image, $dir.$file);
+ }
+ else
+ {
+ // Output the image directly to the browser
+ switch ($save)
+ {
+ case 'imagejpeg':
+ header('Content-Type: image/jpeg');
+ break;
+ case 'imagegif':
+ header('Content-Type: image/gif');
+ break;
+ case 'imagepng':
+ header('Content-Type: image/png');
+ break;
+ }
+
+ $status = isset($quality) ? $save($this->tmp_image, NULL, $quality) : $save($this->tmp_image);
+ }
+
+ // Destroy the temporary image
+ imagedestroy($this->tmp_image);
+ }
+
+ return $status;
+ }
+
+ public function flip($direction)
+ {
+ // Get the current width and height
+ $width = imagesx($this->tmp_image);
+ $height = imagesy($this->tmp_image);
+
+ // Create the flipped image
+ $flipped = $this->imagecreatetransparent($width, $height);
+
+ if ($direction === Image::HORIZONTAL)
+ {
+ for ($x = 0; $x < $width; $x++)
+ {
+ $status = imagecopy($flipped, $this->tmp_image, $x, 0, $width - $x - 1, 0, 1, $height);
+ }
+ }
+ elseif ($direction === Image::VERTICAL)
+ {
+ for ($y = 0; $y < $height; $y++)
+ {
+ $status = imagecopy($flipped, $this->tmp_image, 0, $y, 0, $height - $y - 1, $width, 1);
+ }
+ }
+ else
+ {
+ // Do nothing
+ return TRUE;
+ }
+
+ if ($status === TRUE)
+ {
+ // Swap the new image for the old one
+ imagedestroy($this->tmp_image);
+ $this->tmp_image = $flipped;
+ }
+
+ return $status;
+ }
+
+ public function crop($properties)
+ {
+ // Sanitize the cropping settings
+ $this->sanitize_geometry($properties);
+
+ // Get the current width and height
+ $width = imagesx($this->tmp_image);
+ $height = imagesy($this->tmp_image);
+
+ // Create the temporary image to copy to
+ $img = $this->imagecreatetransparent($properties['width'], $properties['height']);
+
+ // Execute the crop
+ if ($status = imagecopyresampled($img, $this->tmp_image, 0, 0, $properties['left'], $properties['top'], $width, $height, $width, $height))
+ {
+ // Swap the new image for the old one
+ imagedestroy($this->tmp_image);
+ $this->tmp_image = $img;
+ }
+
+ return $status;
+ }
+
+ public function resize($properties)
+ {
+ // Get the current width and height
+ $width = imagesx($this->tmp_image);
+ $height = imagesy($this->tmp_image);
+
+ if (substr($properties['width'], -1) === '%')
+ {
+ // Recalculate the percentage to a pixel size
+ $properties['width'] = round($width * (substr($properties['width'], 0, -1) / 100));
+ }
+
+ if (substr($properties['height'], -1) === '%')
+ {
+ // 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
+ $properties['master'] = (($width / $properties['width']) > ($height / $properties['height'])) ? Image::WIDTH : Image::HEIGHT;
+ }
+
+ if (empty($properties['height']) OR $properties['master'] === Image::WIDTH)
+ {
+ // Recalculate the height based on the width
+ $properties['height'] = round($height * $properties['width'] / $width);
+ }
+
+ if (empty($properties['width']) OR $properties['master'] === Image::HEIGHT)
+ {
+ // Recalculate the width based on the height
+ $properties['width'] = round($width * $properties['height'] / $height);
+ }
+
+ // Test if we can do a resize without resampling to speed up the final resize
+ if ($properties['width'] > $width / 2 AND $properties['height'] > $height / 2)
+ {
+ // Presize width and height
+ $pre_width = $width;
+ $pre_height = $height;
+
+ // The maximum reduction is 10% greater than the final size
+ $max_reduction_width = round($properties['width'] * 1.1);
+ $max_reduction_height = round($properties['height'] * 1.1);
+
+ // Reduce the size using an O(2n) algorithm, until it reaches the maximum reduction
+ while ($pre_width / 2 > $max_reduction_width AND $pre_height / 2 > $max_reduction_height)
+ {
+ $pre_width /= 2;
+ $pre_height /= 2;
+ }
+
+ // Create the temporary image to copy to
+ $img = $this->imagecreatetransparent($pre_width, $pre_height);
+
+ if ($status = imagecopyresized($img, $this->tmp_image, 0, 0, 0, 0, $pre_width, $pre_height, $width, $height))
+ {
+ // Swap the new image for the old one
+ imagedestroy($this->tmp_image);
+ $this->tmp_image = $img;
+ }
+
+ // Set the width and height to the presize
+ $width = $pre_width;
+ $height = $pre_height;
+ }
+
+ // Create the temporary image to copy to
+ $img = $this->imagecreatetransparent($properties['width'], $properties['height']);
+
+ // Execute the resize
+ if ($status = imagecopyresampled($img, $this->tmp_image, 0, 0, 0, 0, $properties['width'], $properties['height'], $width, $height))
+ {
+ // Swap the new image for the old one
+ imagedestroy($this->tmp_image);
+ $this->tmp_image = $img;
+ }
+
+ return $status;
+ }
+
+ public function rotate($amount)
+ {
+ // Use current image to rotate
+ $img = $this->tmp_image;
+
+ // White, with an alpha of 0
+ $transparent = imagecolorallocatealpha($img, 255, 255, 255, 127);
+
+ // Rotate, setting the transparent color
+ $img = imagerotate($img, 360 - $amount, $transparent, -1);
+
+ // Fill the background with the transparent "color"
+ imagecolortransparent($img, $transparent);
+
+ // Merge the images
+ if ($status = imagecopymerge($this->tmp_image, $img, 0, 0, 0, 0, imagesx($this->tmp_image), imagesy($this->tmp_image), 100))
+ {
+ // Prevent the alpha from being lost
+ imagealphablending($img, TRUE);
+ imagesavealpha($img, TRUE);
+
+ // Swap the new image for the old one
+ imagedestroy($this->tmp_image);
+ $this->tmp_image = $img;
+ }
+
+ return $status;
+ }
+
+ public function sharpen($amount)
+ {
+ // Make sure that the sharpening function is available
+ if ( ! function_exists('imageconvolution'))
+ throw new Kohana_Exception('image.unsupported_method', __FUNCTION__);
+
+ // Amount should be in the range of 18-10
+ $amount = round(abs(-18 + ($amount * 0.08)), 2);
+
+ // Gaussian blur matrix
+ $matrix = array
+ (
+ array(-1, -1, -1),
+ array(-1, $amount, -1),
+ array(-1, -1, -1),
+ );
+
+ // Perform the sharpen
+ return imageconvolution($this->tmp_image, $matrix, $amount - 8, 0);
+ }
+
+ protected function properties()
+ {
+ return array(imagesx($this->tmp_image), imagesy($this->tmp_image));
+ }
+
+ /**
+ * Returns an image with a transparent background. Used for rotating to
+ * prevent unfilled backgrounds.
+ *
+ * @param integer image width
+ * @param integer image height
+ * @return resource
+ */
+ protected function imagecreatetransparent($width, $height)
+ {
+ if (self::$blank_png === NULL)
+ {
+ // Decode the blank PNG if it has not been done already
+ self::$blank_png = imagecreatefromstring(base64_decode
+ (
+ 'iVBORw0KGgoAAAANSUhEUgAAACgAAAAoCAYAAACM/rhtAAAABGdBTUEAAK/INwWK6QAAABl0RVh0U29'.
+ 'mdHdhcmUAQWRvYmUgSW1hZ2VSZWFkeXHJZTwAAADqSURBVHjaYvz//z/DYAYAAcTEMMgBQAANegcCBN'.
+ 'CgdyBAAA16BwIE0KB3IEAADXoHAgTQoHcgQAANegcCBNCgdyBAAA16BwIE0KB3IEAADXoHAgTQoHcgQ'.
+ 'AANegcCBNCgdyBAAA16BwIE0KB3IEAADXoHAgTQoHcgQAANegcCBNCgdyBAAA16BwIE0KB3IEAADXoH'.
+ 'AgTQoHcgQAANegcCBNCgdyBAAA16BwIE0KB3IEAADXoHAgTQoHcgQAANegcCBNCgdyBAAA16BwIE0KB'.
+ '3IEAADXoHAgTQoHcgQAANegcCBNCgdyBAgAEAMpcDTTQWJVEAAAAASUVORK5CYII='
+ ));
+
+ // Set the blank PNG width and height
+ self::$blank_png_width = imagesx(self::$blank_png);
+ self::$blank_png_height = imagesy(self::$blank_png);
+ }
+
+ $img = imagecreatetruecolor($width, $height);
+
+ // Resize the blank image
+ imagecopyresized($img, self::$blank_png, 0, 0, 0, 0, $width, $height, self::$blank_png_width, self::$blank_png_height);
+
+ // Prevent the alpha from being lost
+ imagealphablending($img, FALSE);
+ imagesavealpha($img, TRUE);
+
+ return $img;
+ }
+
+} // End Image GD Driver
\ No newline at end of file
projects / speedfreak / blobdiff