/x2engine/protected/extensions/image/drivers/Image_GD_Driver.php
PHP | 400 lines | 257 code | 66 blank | 77 comment | 29 complexity | a0eb0b52b04c7c1090bb0734ac8d5c36 MD5 | raw file
- <?php
- /**
- * 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 CException('Image component requires GD');
- // Get the GD information
- $info = gd_info();
- // Make sure that the GD2 is installed
- if (strpos($info['GD Version'], '2.') === FALSE)
- throw new CException('Image component requires GD v2');
- }
- public function process($image, $actions, $dir, $file, $render = FALSE)
- {
- // Set the "create" function
- switch ($image['type']) {
- case IMAGETYPE_JPEG:
- $create = 'imagecreatefromjpeg';
- $save = 'imagejpeg';
- break;
- case IMAGETYPE_GIF:
- $create = 'imagecreatefromgif';
- $save = 'imagegif';
- break;
- case IMAGETYPE_PNG:
- $create = 'imagecreatefrompng';
- $save = 'imagepng';
- break;
- }
- // Set the "save" function
- switch (strtolower(substr(strrchr($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($create))
- throw new CException('image type not allowed');
- // Make sure the image type is supported for saving
- if (empty($save) or !function_exists($save))
- throw new CException('image type not allowed');
- // 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 = null;
- if (array_key_exists('quality', $actions)) {
- $quality = $actions['quality'];
- unset($actions['quality']);
- }
- 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);
- $status = false;
- switch ($direction) {
- case Image::HORIZONTAL:
- for ($x = 0; $x < $width; $x++) {
- $status = imagecopy($flipped, $this->tmp_image, $x, 0, $width - $x - 1, 0, 1, $height);
- }
- break;
- case Image::VERTICAL:
- for ($y = 0; $y < $height; $y++) {
- $status = imagecopy($flipped, $this->tmp_image, 0, $y, 0, $height - $y - 1, $width, 1);
- }
- break;
- default:
- return true;
- }
- if ($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 CException('image unsupported method');
- // 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, $amount - 8, 0);
- }
- public function grayscale($unused)
- {
- return imagefilter($this->tmp_image, IMG_FILTER_GRAYSCALE);
- }
- public function colorize($params)
- {
- return imagefilter($this->tmp_image, IMG_FILTER_COLORIZE, $params['r'], $params['g'], $params['b'], $params['a']);
- }
- public function emboss($unused)
- {
- return imagefilter($this->tmp_image, IMG_FILTER_EMBOSS);
- }
- public function negate($unused)
- {
- return imagefilter($this->tmp_image, IMG_FILTER_NEGATE);
- }
- protected function properties()
- {
- return array(imagesx($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 $img;
- }
- public function watermark($params)
- {
- $path = $params['path'];
- $x = $params['x'];
- $y = $params['y'];
- imagealphablending($this->tmp_image, true);
- imagesavealpha($this->tmp_image, true);
- $mark = imagecreatefrompng($path);
- imagecopyresized($this->tmp_image, $mark, $x, $y, 0, 0, imagesx($mark), imagesy($mark), imagesx($mark), imagesy($mark));
- imagedestroy($mark);
- return $this->tmp_image;
- }
- } // End Image GD Driver