357 lines
9.7 KiB
PHP
357 lines
9.7 KiB
PHP
<?php
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/**
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* WordPress GD Image Editor
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*
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* @package WordPress
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* @subpackage Image_Editor
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*/
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/**
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* WordPress Image Editor Class for Image Manipulation through GD
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*
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* @since 3.5.0
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* @package WordPress
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* @subpackage Image_Editor
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* @uses WP_Image_Editor Extends class
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*/
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class WP_Image_Editor_GD extends WP_Image_Editor {
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protected $image = false; // GD Resource
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function __destruct() {
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if ( $this->image ) {
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// we don't need the original in memory anymore
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imagedestroy( $this->image );
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}
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}
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/**
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* Checks to see if current environment supports GD
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*
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* @since 3.5.0
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* @access protected
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*
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* @return boolean
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*/
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public function test() {
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if ( ! extension_loaded('gd') || ! function_exists('gd_info') )
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return false;
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return true;
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}
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/**
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* Loads image from $this->file into new GD Resource
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*
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* @since 3.5
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* @access protected
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*
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* @return boolean|\WP_Error
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*/
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protected function load() {
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if ( $this->image )
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return true;
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if ( ! is_file( $this->file ) )
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return new WP_Error( 'error_loading_image', __('File doesn’t exist?'), $this->file );
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// Set artificially high because GD uses uncompressed images in memory
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@ini_set( 'memory_limit', apply_filters( 'image_memory_limit', WP_MAX_MEMORY_LIMIT ) );
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$this->image = @imagecreatefromstring( file_get_contents( $this->file ) );
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if ( ! is_resource( $this->image ) )
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return new WP_Error( 'invalid_image', __('File is not an image.'), $this->file );
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$size = @getimagesize( $this->file );
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if ( ! $size )
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return new WP_Error( 'invalid_image', __('Could not read image size.'), $this->file );
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$this->update_size( $size[0], $size[1] );
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$this->mime_type = $size['mime'];
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return true;
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}
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/**
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* Sets or updates current image size
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*
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* @since 3.5.0
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* @access protected
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*
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* @param int $width
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* @param int $height
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*/
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protected function update_size( $width = false, $height = false ) {
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if ( ! $width )
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$width = imagesx( $this->image );
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if ( ! $height )
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$height = imagesy( $this->image );
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return parent::update_size( $width, $height );
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}
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/**
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* Checks to see if editor supports mime-type specified
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*
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* @since 3.5.0
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* @access public
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*
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* @param string $mime_type
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* @return boolean
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*/
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public function supports_mime_type( $mime_type ) {
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$allowed_mime_types = array( 'image/gif', 'image/png', 'image/jpeg' );
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return in_array( $mime_type, $allowed_mime_types );
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}
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/**
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* Resizes current image.
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* Wrapper around _resize, since _resize returns a GD Resource
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*
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* @param int $max_w
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* @param int $max_h
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* @param boolean $crop
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* @return boolean|WP_Error
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*/
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public function resize( $max_w, $max_h, $crop = false ) {
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if ( ( $this->size['width'] == $max_w ) && ( $this->size['height'] == $max_h ) )
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return true;
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$resized = $this->_resize( $max_w, $max_h, $crop );
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if ( is_resource( $resized ) ) {
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imagedestroy( $this->image );
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$this->image = $resized;
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return true;
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} elseif ( is_wp_error( $resized ) )
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return $resized;
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return new WP_Error( 'image_resize_error', __('Image resize failed.'), $this->file );
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}
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protected function _resize( $max_w, $max_h, $crop = false ) {
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$dims = image_resize_dimensions( $this->size['width'], $this->size['height'], $max_w, $max_h, $crop );
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if ( ! $dims ) {
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return new WP_Error( 'error_getting_dimensions', __('Could not calculate resized image dimensions'), $this->file );
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}
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list( $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h ) = $dims;
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$resized = wp_imagecreatetruecolor( $dst_w, $dst_h );
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imagecopyresampled( $resized, $this->image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h );
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if ( is_resource( $resized ) ) {
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$this->update_size( $dst_w, $dst_h );
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return $resized;
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}
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return new WP_Error( 'image_resize_error', __('Image resize failed.'), $this->file );
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}
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/**
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* Processes current image and saves to disk
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* multiple sizes from single source.
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*
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* @param array $sizes { {width, height}, ... }
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* @return array
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*/
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public function multi_resize( $sizes ) {
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$metadata = array();
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$orig_size = $this->size;
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foreach ( $sizes as $size => $size_data ) {
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$image = $this->_resize( $size_data['width'], $size_data['height'], $size_data['crop'] );
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if( ! is_wp_error( $image ) ) {
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$resized = $this->_save( $image );
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imagedestroy( $image );
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unset( $resized['path'] );
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if ( ! is_wp_error( $resized ) && $resized )
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$metadata[$size] = $resized;
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}
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$this->size = $orig_size;
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}
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return $metadata;
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}
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/**
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* Crops Image.
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*
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* @since 3.5.0
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* @access public
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*
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* @param string|int $src The source file or Attachment ID.
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* @param int $src_x The start x position to crop from.
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* @param int $src_y The start y position to crop from.
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* @param int $src_w The width to crop.
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* @param int $src_h The height to crop.
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* @param int $dst_w Optional. The destination width.
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* @param int $dst_h Optional. The destination height.
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* @param int $src_abs Optional. If the source crop points are absolute.
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* @return boolean|WP_Error
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*/
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public function crop( $src_x, $src_y, $src_w, $src_h, $dst_w = null, $dst_h = null, $src_abs = false ) {
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// If destination width/height isn't specified, use same as
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// width/height from source.
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if ( ! $dst_w )
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$dst_w = $src_w;
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if ( ! $dst_h )
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$dst_h = $src_h;
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$dst = wp_imagecreatetruecolor( $dst_w, $dst_h );
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if ( $src_abs ) {
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$src_w -= $src_x;
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$src_h -= $src_y;
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}
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if ( function_exists( 'imageantialias' ) )
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imageantialias( $dst, true );
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imagecopyresampled( $dst, $this->image, 0, 0, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h );
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if ( is_resource( $dst ) ) {
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imagedestroy( $this->image );
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$this->image = $dst;
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$this->update_size( $dst_w, $dst_h );
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return true;
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}
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return new WP_Error( 'image_crop_error', __('Image crop failed.'), $this->file );
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}
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/**
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* Rotates current image counter-clockwise by $angle.
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* Ported from image-edit.php
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*
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* @since 3.5.0
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* @access public
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*
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* @param float $angle
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* @return boolean|WP_Error
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*/
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public function rotate( $angle ) {
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if ( function_exists('imagerotate') ) {
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$rotated = imagerotate( $this->image, $angle, 0 );
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if ( is_resource( $rotated ) ) {
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imagedestroy( $this->image );
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$this->image = $rotated;
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$this->update_size();
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return true;
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}
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}
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return new WP_Error( 'image_rotate_error', __('Image rotate failed.'), $this->file );
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}
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/**
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* Flips current image
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*
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* @param boolean $horz Horizonal Flip
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* @param boolean $vert Vertical Flip
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* @returns boolean|WP_Error
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*/
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public function flip( $horz, $vert ) {
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$w = $this->size['width'];
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$h = $this->size['height'];
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$dst = wp_imagecreatetruecolor( $w, $h );
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if ( is_resource( $dst ) ) {
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$sx = $vert ? ($w - 1) : 0;
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$sy = $horz ? ($h - 1) : 0;
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$sw = $vert ? -$w : $w;
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$sh = $horz ? -$h : $h;
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if ( imagecopyresampled( $dst, $this->image, 0, 0, $sx, $sy, $w, $h, $sw, $sh ) ) {
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imagedestroy( $this->image );
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$this->image = $dst;
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return true;
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}
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}
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return new WP_Error( 'image_flip_error', __('Image flip failed.'), $this->file );
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}
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/**
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* Saves current in-memory image to file
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*
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* @param string $destfilename
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* @param string $mime_type
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* @return array|WP_Error {'path'=>string, 'file'=>string, 'width'=>int, 'height'=>int, 'mime-type'=>string}
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*/
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public function save( $filename = null, $mime_type = null ) {
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$saved = $this->_save( $this->image, $filename, $mime_type );
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if ( ! is_wp_error( $saved ) ) {
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$this->file = $saved['path'];
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$this->mime_type = $saved['mime-type'];
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}
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return $saved;
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}
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protected function _save( $image, $filename = null, $mime_type = null ) {
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list( $filename, $extension, $mime_type ) = $this->get_output_format( $filename, $mime_type );
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if ( ! $filename )
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$filename = $this->generate_filename( null, null, $extension );
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if ( 'image/gif' == $mime_type ) {
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if ( ! $this->make_image( $filename, 'imagegif', array( $image, $filename ) ) )
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return new WP_Error( 'image_save_error', __('Image Editor Save Failed') );
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}
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elseif ( 'image/png' == $mime_type ) {
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// convert from full colors to index colors, like original PNG.
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if ( function_exists('imageistruecolor') && ! imageistruecolor( $image ) )
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imagetruecolortopalette( $image, false, imagecolorstotal( $image ) );
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if ( ! $this->make_image( $filename, 'imagepng', array( $image, $filename ) ) )
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return new WP_Error( 'image_save_error', __('Image Editor Save Failed') );
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}
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elseif ( 'image/jpeg' == $mime_type ) {
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if ( ! $this->make_image( $filename, 'imagejpeg', array( $image, $filename, apply_filters( 'jpeg_quality', $this->quality, 'image_resize' ) ) ) )
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return new WP_Error( 'image_save_error', __('Image Editor Save Failed') );
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}
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else {
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return new WP_Error( 'image_save_error', __('Image Editor Save Failed') );
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}
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// Set correct file permissions
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$stat = stat( dirname( $filename ) );
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$perms = $stat['mode'] & 0000666; //same permissions as parent folder, strip off the executable bits
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@ chmod( $filename, $perms );
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return array(
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'path' => $filename,
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'file' => wp_basename( apply_filters( 'image_make_intermediate_size', $filename ) ),
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'width' => $this->size['width'],
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'height' => $this->size['height'],
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'mime-type'=> $mime_type,
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);
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}
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/**
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* Returns stream of current image
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*
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* @param string $mime_type
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*/
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public function stream( $mime_type = null ) {
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list( $filename, $extension, $mime_type ) = $this->get_output_format( null, $mime_type );
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switch ( $mime_type ) {
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case 'image/png':
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header( 'Content-Type: image/png' );
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return imagepng( $this->image );
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case 'image/gif':
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header( 'Content-Type: image/gif' );
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return imagegif( $this->image );
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default:
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header( 'Content-Type: image/jpeg' );
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return imagejpeg( $this->image, null, $this->quality );
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}
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}
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} |