--- /dev/null
+<?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 {
+
+ protected $image = false; // GD Resource
+
+ 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
+ * @access public
+ *
+ * @return boolean
+ */
+ 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
+ * @access public
+ *
+ * @param string $mime_type
+ * @return boolean
+ */
+ 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 boolean|\WP_Error
+ */
+ 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’t exist?'), $this->file );
+
+ // Set artificially high because GD uses uncompressed images in memory
+ @ini_set( 'memory_limit', apply_filters( 'image_memory_limit', WP_MAX_MEMORY_LIMIT ) );
+ $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 );
+
+ $this->update_size( $size[0], $size[1] );
+ $this->mime_type = $size['mime'];
+
+ return true;
+ }
+
+ /**
+ * Sets or updates current image size.
+ *
+ * @since 3.5.0
+ * @access protected
+ *
+ * @param int $width
+ * @param int $height
+ */
+ 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.
+ *
+ * @since 3.5.0
+ * @access public
+ *
+ * @param int $max_w
+ * @param int $max_h
+ * @param boolean $crop
+ * @return boolean|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 );
+ }
+
+ 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 );
+ }
+
+ /**
+ * Processes current image and saves to disk
+ * multiple sizes from single source.
+ *
+ * @since 3.5.0
+ * @access public
+ *
+ * @param array $sizes { {'width'=>int, 'height'=>int, 'crop'=>bool}, ... }
+ * @return array
+ */
+ public function multi_resize( $sizes ) {
+ $metadata = array();
+ $orig_size = $this->size;
+
+ foreach ( $sizes as $size => $size_data ) {
+ $image = $this->_resize( $size_data['width'], $size_data['height'], $size_data['crop'] );
+
+ if( ! is_wp_error( $image ) ) {
+ $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 string|int $src The source file or Attachment ID.
+ * @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 boolean $src_abs Optional. If the source crop points are absolute.
+ * @return boolean|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 boolean|WP_Error
+ */
+ public function rotate( $angle ) {
+ if ( function_exists('imagerotate') ) {
+ $rotated = imagerotate( $this->image, $angle, 0 );
+
+ if ( is_resource( $rotated ) ) {
+ 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 boolean $horz Horizontal Flip
+ * @param boolean $vert Vertical Flip
+ * @returns boolean|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 $destfilename
+ * @param string $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;
+ }
+
+ 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, apply_filters( 'jpeg_quality', $this->quality, 'image_resize' ) ) ) )
+ 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 );
+
+ 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
+ */
+ 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->quality );
+ }
+ }
+}
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