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EDIT :: class-wp-image-editor-gd.php

<?php /** * WordPress GD Image Editor * * @package WordPress * @subpackage Image_Editor */ /** * WordPress Image Editor Class for Image Manipulation through GD * * @since 3.5.0 * @package WordPress * @subpackage Image_Editor * @uses WP_Image_Editor Extends class */ class WP_Image_Editor_GD extends WP_Image_Editor { /** * GD Resource. * * @access protected * @var resource */ protected $image; public function __destruct() { if ( $this->image ) { // we don't need the original in memory anymore imagedestroy( $this->image ); } } /** * Checks to see if current environment supports GD. * * @since 3.5.0 * * @static * @access public * * @param array $args * @return bool */ public static function test( $args = array() ) { if ( ! extension_loaded('gd') || ! function_exists('gd_info') ) return false; // On some setups GD library does not provide imagerotate() - Ticket #11536 if ( isset( $args['methods'] ) && in_array( 'rotate', $args['methods'] ) && ! function_exists('imagerotate') ){ return false; } return true; } /** * Checks to see if editor supports the mime-type specified. * * @since 3.5.0 * * @static * @access public * * @param string $mime_type * @return bool */ public static function supports_mime_type( $mime_type ) { $image_types = imagetypes(); switch( $mime_type ) { case 'image/jpeg': return ($image_types & IMG_JPG) != 0; case 'image/png': return ($image_types & IMG_PNG) != 0; case 'image/gif': return ($image_types & IMG_GIF) != 0; } return false; } /** * Loads image from $this->file into new GD Resource. * * @since 3.5.0 * @access protected * * @return bool|WP_Error True if loaded successfully; WP_Error on failure. */ public function load() { if ( $this->image ) return true; if ( ! is_file( $this->file ) && ! preg_match( '|^https?://|', $this->file ) ) return new WP_Error( 'error_loading_image', __('File doesn&#8217;t exist?'), $this->file ); // Set artificially high because GD uses uncompressed images in memory. wp_raise_memory_limit( 'image' ); $this->image = @imagecreatefromstring( file_get_contents( $this->file ) ); if ( ! is_resource( $this->image ) ) return new WP_Error( 'invalid_image', __('File is not an image.'), $this->file ); $size = @getimagesize( $this->file ); if ( ! $size ) return new WP_Error( 'invalid_image', __('Could not read image size.'), $this->file ); if ( function_exists( 'imagealphablending' ) && function_exists( 'imagesavealpha' ) ) { imagealphablending( $this->image, false ); imagesavealpha( $this->image, true ); } $this->update_size( $size[0], $size[1] ); $this->mime_type = $size['mime']; return $this->set_quality(); } /** * Sets or updates current image size. * * @since 3.5.0 * @access protected * * @param int $width * @param int $height * @return true */ protected function update_size( $width = false, $height = false ) { if ( ! $width ) $width = imagesx( $this->image ); if ( ! $height ) $height = imagesy( $this->image ); return parent::update_size( $width, $height ); } /** * Resizes current image. * Wraps _resize, since _resize returns a GD Resource. * * At minimum, either a height or width must be provided. * If one of the two is set to null, the resize will * maintain aspect ratio according to the provided dimension. * * @since 3.5.0 * @access public * * @param int|null $max_w Image width. * @param int|null $max_h Image height. * @param bool $crop * @return true|WP_Error */ public function resize( $max_w, $max_h, $crop = false ) { if ( ( $this->size['width'] == $max_w ) && ( $this->size['height'] == $max_h ) ) return true; $resized = $this->_resize( $max_w, $max_h, $crop ); if ( is_resource( $resized ) ) { imagedestroy( $this->image ); $this->image = $resized; return true; } elseif ( is_wp_error( $resized ) ) return $resized; return new WP_Error( 'image_resize_error', __('Image resize failed.'), $this->file ); } /** * * @param int $max_w * @param int $max_h * @param bool|array $crop * @return resource|WP_Error */ protected function _resize( $max_w, $max_h, $crop = false ) { $dims = image_resize_dimensions( $this->size['width'], $this->size['height'], $max_w, $max_h, $crop ); if ( ! $dims ) { return new WP_Error( 'error_getting_dimensions', __('Could not calculate resized image dimensions'), $this->file ); } list( $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h ) = $dims; $resized = wp_imagecreatetruecolor( $dst_w, $dst_h ); imagecopyresampled( $resized, $this->image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h ); if ( is_resource( $resized ) ) { $this->update_size( $dst_w, $dst_h ); return $resized; } return new WP_Error( 'image_resize_error', __('Image resize failed.'), $this->file ); } /** * Resize multiple images from a single source. * * @since 3.5.0 * @access public * * @param array $sizes { * An array of image size arrays. Default sizes are 'small', 'medium', 'medium_large', 'large'. * * Either a height or width must be provided. * If one of the two is set to null, the resize will * maintain aspect ratio according to the provided dimension. * * @type array $size { * Array of height, width values, and whether to crop. * * @type int $width Image width. Optional if `$height` is specified. * @type int $height Image height. Optional if `$width` is specified. * @type bool $crop Optional. Whether to crop the image. Default false. * } * } * @return array An array of resized images' metadata by size. */ public function multi_resize( $sizes ) { $metadata = array(); $orig_size = $this->size; foreach ( $sizes as $size => $size_data ) { if ( ! isset( $size_data['width'] ) && ! isset( $size_data['height'] ) ) { continue; } if ( ! isset( $size_data['width'] ) ) { $size_data['width'] = null; } if ( ! isset( $size_data['height'] ) ) { $size_data['height'] = null; } if ( ! isset( $size_data['crop'] ) ) { $size_data['crop'] = false; } $image = $this->_resize( $size_data['width'], $size_data['height'], $size_data['crop'] ); $duplicate = ( ( $orig_size['width'] == $size_data['width'] ) && ( $orig_size['height'] == $size_data['height'] ) ); if ( ! is_wp_error( $image ) && ! $duplicate ) { $resized = $this->_save( $image ); imagedestroy( $image ); if ( ! is_wp_error( $resized ) && $resized ) { unset( $resized['path'] ); $metadata[$size] = $resized; } } $this->size = $orig_size; } return $metadata; } /** * Crops Image. * * @since 3.5.0 * @access public * * @param int $src_x The start x position to crop from. * @param int $src_y The start y position to crop from. * @param int $src_w The width to crop. * @param int $src_h The height to crop. * @param int $dst_w Optional. The destination width. * @param int $dst_h Optional. The destination height. * @param bool $src_abs Optional. If the source crop points are absolute. * @return bool|WP_Error */ public function crop( $src_x, $src_y, $src_w, $src_h, $dst_w = null, $dst_h = null, $src_abs = false ) { // If destination width/height isn't specified, use same as // width/height from source. if ( ! $dst_w ) $dst_w = $src_w; if ( ! $dst_h ) $dst_h = $src_h; $dst = wp_imagecreatetruecolor( $dst_w, $dst_h ); if ( $src_abs ) { $src_w -= $src_x; $src_h -= $src_y; } if ( function_exists( 'imageantialias' ) ) imageantialias( $dst, true ); imagecopyresampled( $dst, $this->image, 0, 0, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h ); if ( is_resource( $dst ) ) { imagedestroy( $this->image ); $this->image = $dst; $this->update_size(); return true; } return new WP_Error( 'image_crop_error', __('Image crop failed.'), $this->file ); } /** * Rotates current image counter-clockwise by $angle. * Ported from image-edit.php * * @since 3.5.0 * @access public * * @param float $angle * @return true|WP_Error */ public function rotate( $angle ) { if ( function_exists('imagerotate') ) { $transparency = imagecolorallocatealpha( $this->image, 255, 255, 255, 127 ); $rotated = imagerotate( $this->image, $angle, $transparency ); if ( is_resource( $rotated ) ) { imagealphablending( $rotated, true ); imagesavealpha( $rotated, true ); imagedestroy( $this->image ); $this->image = $rotated; $this->update_size(); return true; } } return new WP_Error( 'image_rotate_error', __('Image rotate failed.'), $this->file ); } /** * Flips current image. * * @since 3.5.0 * @access public * * @param bool $horz Flip along Horizontal Axis * @param bool $vert Flip along Vertical Axis * @return true|WP_Error */ public function flip( $horz, $vert ) { $w = $this->size['width']; $h = $this->size['height']; $dst = wp_imagecreatetruecolor( $w, $h ); if ( is_resource( $dst ) ) { $sx = $vert ? ($w - 1) : 0; $sy = $horz ? ($h - 1) : 0; $sw = $vert ? -$w : $w; $sh = $horz ? -$h : $h; if ( imagecopyresampled( $dst, $this->image, 0, 0, $sx, $sy, $w, $h, $sw, $sh ) ) { imagedestroy( $this->image ); $this->image = $dst; return true; } } return new WP_Error( 'image_flip_error', __('Image flip failed.'), $this->file ); } /** * Saves current in-memory image to file. * * @since 3.5.0 * @access public * * @param string|null $filename * @param string|null $mime_type * @return array|WP_Error {'path'=>string, 'file'=>string, 'width'=>int, 'height'=>int, 'mime-type'=>string} */ public function save( $filename = null, $mime_type = null ) { $saved = $this->_save( $this->image, $filename, $mime_type ); if ( ! is_wp_error( $saved ) ) { $this->file = $saved['path']; $this->mime_type = $saved['mime-type']; } return $saved; } /** * @param resource $image * @param string|null $filename * @param string|null $mime_type * @return WP_Error|array */ protected function _save( $image, $filename = null, $mime_type = null ) { list( $filename, $extension, $mime_type ) = $this->get_output_format( $filename, $mime_type ); if ( ! $filename ) $filename = $this->generate_filename( null, null, $extension ); if ( 'image/gif' == $mime_type ) { if ( ! $this->make_image( $filename, 'imagegif', array( $image, $filename ) ) ) return new WP_Error( 'image_save_error', __('Image Editor Save Failed') ); } elseif ( 'image/png' == $mime_type ) { // convert from full colors to index colors, like original PNG. if ( function_exists('imageistruecolor') && ! imageistruecolor( $image ) ) imagetruecolortopalette( $image, false, imagecolorstotal( $image ) ); if ( ! $this->make_image( $filename, 'imagepng', array( $image, $filename ) ) ) return new WP_Error( 'image_save_error', __('Image Editor Save Failed') ); } elseif ( 'image/jpeg' == $mime_type ) { if ( ! $this->make_image( $filename, 'imagejpeg', array( $image, $filename, $this->get_quality() ) ) ) return new WP_Error( 'image_save_error', __('Image Editor Save Failed') ); } else { return new WP_Error( 'image_save_error', __('Image Editor Save Failed') ); } // Set correct file permissions $stat = stat( dirname( $filename ) ); $perms = $stat['mode'] & 0000666; //same permissions as parent folder, strip off the executable bits @ chmod( $filename, $perms ); /** * Filters the name of the saved image file. * * @since 2.6.0 * * @param string $filename Name of the file. */ return array( 'path' => $filename, 'file' => wp_basename( apply_filters( 'image_make_intermediate_size', $filename ) ), 'width' => $this->size['width'], 'height' => $this->size['height'], 'mime-type' => $mime_type, ); } /** * Returns stream of current image. * * @since 3.5.0 * @access public * * @param string $mime_type * @return bool */ public function stream( $mime_type = null ) { list( $filename, $extension, $mime_type ) = $this->get_output_format( null, $mime_type ); switch ( $mime_type ) { case 'image/png': header( 'Content-Type: image/png' ); return imagepng( $this->image ); case 'image/gif': header( 'Content-Type: image/gif' ); return imagegif( $this->image ); default: header( 'Content-Type: image/jpeg' ); return imagejpeg( $this->image, null, $this->get_quality() ); } } /** * Either calls editor's save function or handles file as a stream. * * @since 3.5.0 * @access protected * * @param string|stream $filename * @param callable $function * @param array $arguments * @return bool */ protected function make_image( $filename, $function, $arguments ) { if ( wp_is_stream( $filename ) ) $arguments[1] = null; return parent::make_image( $filename, $function, $arguments ); } }

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