391 lines
10 KiB
PHP
391 lines
10 KiB
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 {
|
|
|
|
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 Flip along Horizontal Axis
|
|
* @param boolean $vert Flip along Vertical Axis
|
|
* @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 );
|
|
}
|
|
}
|
|
}
|