Rename 'kohana' to 'system' to conform to the Kohana filesystem layout. I'm comfortable with us not clearly drawing the distinction about the fact that it's Kohana.

1 files changed, 401 insertions, 0 deletions

diff --git a/system/libraries/drivers/Image/GD.php b/system/libraries/drivers/Image/GD.php
new file mode 100644
index 00000000..be2af4e2
--- /dev/null
+++ b/system/libraries/drivers/Image/GD.php
@@ -0,0 +1,401 @@
+<?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, $amount - 8, 0);
+	}
+
+	public function composite($properties)
+	{
+		switch($properties['mime'])
+		{
+			case "image/jpeg":
+			$overlay_img = imagecreatefromjpeg($properties['overlay_file']);
+			break;
+
+			case "image/gif":
+			$overlay_img = imagecreatefromgif($properties['overlay_file']);
+			break;
+
+			case "image/png":
+			$overlay_img = imagecreatefrompng($properties['overlay_file']);
+			break;
+		}
+
+		imagecopymerge($this->tmp_image, $overlay_img, $properties['x'], $properties['y'], 0, 0, imagesx($overlay_img), imagesy($overlay_img), $properties['transparency']);
+		imagedestroy($overlay_img);
+		return TRUE;
+	}
+
+	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