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Refactor of wp-admin/includes/image.php. Fixes #5312, #4151, #4709, #5304 props DD32. 

git-svn-id: http://svn.automattic.com/wordpress/trunk@6309 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
westi 2007-11-03 18:33:19 +00:00
parent cc83c30953
commit 3d04ae4f29
2 changed files with 147 additions and 103 deletions
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239
wp-admin/includes/image.php
View File

@ -1,108 +1,92 @@
<?php
/**
* File contains all the administration image manipulation functions.
*
* @package WordPress
*/
function get_udims( $width, $height) {
if ( $height <= 96 && $width <= 128 )
return array( $width, $height);
elseif ( $width / $height > 4 / 3 )
return array( 128, (int) ($height / $width * 128 ));
else
return array( (int) ($width / $height * 96 ), 96 );
}
/**
* wp_create_thumbnail() - Create a thumbnail from an Image given a maximum side size.
*
* @package WordPress
* @param mixed $file Filename of the original image, Or attachment id
* @param int $max_side Maximum length of a single side for the thumbnail
* @return string Thumbnail path on success, Error string on failure
*
* This function can handle most image file formats which PHP supports.
* If PHP does not have the functionality to save in a file of the same format, the thumbnail will be created as a jpeg.
*/
function wp_create_thumbnail( $file, $max_side, $depreciated = '' ) {
if ( ctype_digit( $file ) ) // Handle int as attachment ID
$file = get_attached_file( $file );
function wp_create_thumbnail( $file, $max_side, $effect = '' ) {
$image = wp_load_image( $file );
if ( !is_resource( $image ) )
return $image;
// 1 = GIF, 2 = JPEG, 3 = PNG
list($sourceImageWidth, $sourceImageHeight, $sourceImageType) = getimagesize( $file );
if ( file_exists( $file ) ) {
$type = getimagesize( $file );
if ( function_exists( 'imageantialias' ))
imageantialias( $image, true );
// if the associated function doesn't exist - then it's not
// handle. duh. i hope.
list($image_new_width, $image_new_height) = wp_shrink_dimensions( $sourceImageWidth, $sourceImageHeight, $max_side, $max_side);
if (!function_exists( 'imagegif' ) && $type[2] == 1 ) {
$error = __( 'Filetype not supported. Thumbnail not created.' );
}
elseif (!function_exists( 'imagejpeg' ) && $type[2] == 2 ) {
$error = __( 'Filetype not supported. Thumbnail not created.' );
}
elseif (!function_exists( 'imagepng' ) && $type[2] == 3 ) {
$error = __( 'Filetype not supported. Thumbnail not created.' );
} else {
$thumbnail = imagecreatetruecolor( $image_new_width, $image_new_height);
@ imagecopyresampled( $thumbnail, $image, 0, 0, 0, 0, $image_new_width, $image_new_height, $sourceImageWidth, $sourceImageHeight );
// create the initial copy from the original file
if ( $type[2] == 1 ) {
$image = imagecreatefromgif( $file );
}
elseif ( $type[2] == 2 ) {
$image = imagecreatefromjpeg( $file );
}
elseif ( $type[2] == 3 ) {
$image = imagecreatefrompng( $file );
}
imagedestroy( $image ); // Free up memory
if ( function_exists( 'imageantialias' ))
imageantialias( $image, TRUE );
// If no filters change the filename, we'll do a default transformation.
if ( basename( $file ) == $thumb = apply_filters( 'thumbnail_filename', basename( $file ) ) )
$thumb = preg_replace( '!(\.[^.]+)?$!', '.thumbnail$1', basename( $file ), 1 );
$image_attr = getimagesize( $file );
$thumbpath = str_replace( basename( $file ), $thumb, $file );
// figure out the longest side
if ( $image_attr[0] > $image_attr[1] ) {
$image_width = $image_attr[0];
$image_height = $image_attr[1];
$image_new_width = $max_side;
$image_ratio = $image_width / $image_new_width;
$image_new_height = $image_height / $image_ratio;
//width is > height
} else {
$image_width = $image_attr[0];
$image_height = $image_attr[1];
$image_new_height = $max_side;
$image_ratio = $image_height / $image_new_height;
$image_new_width = $image_width / $image_ratio;
//height > width
}
$thumbnail = imagecreatetruecolor( $image_new_width, $image_new_height);
@ imagecopyresampled( $thumbnail, $image, 0, 0, 0, 0, $image_new_width, $image_new_height, $image_attr[0], $image_attr[1] );
// If no filters change the filename, we'll do a default transformation.
if ( basename( $file ) == $thumb = apply_filters( 'thumbnail_filename', basename( $file ) ) )
$thumb = preg_replace( '!(\.[^.]+)?$!', '.thumbnail' . '$1', basename( $file ), 1 );
$thumbpath = str_replace( basename( $file ), $thumb, $file );
// move the thumbnail to its final destination
if ( $type[2] == 1 ) {
if (!imagegif( $thumbnail, $thumbpath ) ) {
$error = __( "Thumbnail path invalid" );
}
}
elseif ( $type[2] == 2 ) {
if (!imagejpeg( $thumbnail, $thumbpath ) ) {
$error = __( "Thumbnail path invalid" );
}
}
elseif ( $type[2] == 3 ) {
if (!imagepng( $thumbnail, $thumbpath ) ) {
$error = __( "Thumbnail path invalid" );
}
}
}
} else {
$error = __( 'File not found' );
switch( $sourceImageType ){
default: // We'll create a Jpeg if we cant use its native file format
$thumb = preg_replace( '/\\.[^\\.]+$/', '.jpg', $thumb ); //Change file extension to Jpg
case IMAGETYPE_JPEG:
if (!imagejpeg( $thumbnail, $thumbpath ) )
return __( 'Thumbnail path invalid' );
break;
case IMAGETYPE_GIF:
if (!imagegif( $thumbnail, $thumbpath ) )
return __( 'Thumbnail path invalid' );
break;
case IMAGETYPE_PNG:
if (!imagepng( $thumbnail, $thumbpath ) )
return __( 'Thumbnail path invalid' );
break;
}
if (!empty ( $error ) ) {
return $error;
} else {
return apply_filters( 'wp_create_thumbnail', $thumbpath );
}
imagedestroy( $thumbnail ); // Free up memory
// Set correct file permissions
$stat = stat( dirname( $thumbpath ));
$perms = $stat['mode'] & 0000666; //same permissions as parent folder, strip off the executable bits
@ chmod( $thumbpath, $perms );
return apply_filters( 'wp_create_thumbnail', $thumbpath );
}
/**
* wp_crop_image() - Crop an Image to a given size.
*
* @package WordPress
* @internal Missing Long Description
* @param int $src_file The source file
* @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 The destination width
* @param int $dst_h The destination height
* @param int $src_abs If the source crop points are absolute
* @param int $dst_file The destination file to write to
* @return string New filepath on success, String error message on failure
*
*/
function wp_crop_image( $src_file, $src_x, $src_y, $src_w, $src_h, $dst_w, $dst_h, $src_abs = false, $dst_file = false ) {
if ( ctype_digit( $src_file ) ) // Handle int as attachment ID
$src_file = get_attached_file( $src_file );
@ -123,9 +107,11 @@ function wp_crop_image( $src_file, $src_x, $src_y, $src_w, $src_h, $dst_w, $dst_
imageantialias( $dst, true );
imagecopyresampled( $dst, $src, 0, 0, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h );
imagedestroy( $src ); // Free up memory
if ( !$dst_file )
$dst_file = str_replace( basename( $src_file ), 'cropped-'.basename( $src_file ), $src_file );
if ( ! $dst_file )
$dst_file = str_replace( basename( $src_file ), 'cropped-' . basename( $src_file ), $src_file );
$dst_file = preg_replace( '/\\.[^\\.]+$/', '.jpg', $dst_file );
@ -135,15 +121,25 @@ function wp_crop_image( $src_file, $src_x, $src_y, $src_w, $src_h, $dst_w, $dst_
return false;
}
/**
* wp_generate_attachment_metadata() - Generate post Image attachment Metadata
*
* @package WordPress
* @internal Missing Long Description
* @param int $attachment_id Attachment Id to process
* @param string $file Filepath of the Attached image
* @return mixed Metadata for attachment
*
*/
function wp_generate_attachment_metadata( $attachment_id, $file ) {
$attachment = get_post( $attachment_id );
$metadata = array();
if ( preg_match('!^image/!', get_post_mime_type( $attachment )) ) {
$imagesize = getimagesize($file);
$metadata['width'] = $imagesize['0'];
$metadata['height'] = $imagesize['1'];
list($uwidth, $uheight) = get_udims($metadata['width'], $metadata['height']);
$imagesize = getimagesize( $file );
$metadata['width'] = $imagesize[0];
$metadata['height'] = $imagesize[1];
list($uwidth, $uheight) = wp_shrink_dimensions($metadata['width'], $metadata['height']);
$metadata['hwstring_small'] = "height='$uheight' width='$uwidth'";
$metadata['file'] = $file;
@ -160,19 +156,26 @@ function wp_generate_attachment_metadata( $attachment_id, $file ) {
return apply_filters( 'wp_generate_attachment_metadata', $metadata );
}
/**
* wp_load_image() - Load an image which PHP Supports.
*
* @package WordPress
* @internal Missing Long Description
* @param string $file Filename of the image to load
* @return resource The resulting image resource on success, Error string on failure.
*
*/
function wp_load_image( $file ) {
if ( ctype_digit( $file ) )
$file = get_attached_file( $file );
if ( !file_exists( $file ) )
if ( ! file_exists( $file ) )
return sprintf(__("File '%s' doesn't exist?"), $file);
if ( ! function_exists('imagecreatefromstring') )
return __('The GD image library is not installed.');
$contents = file_get_contents( $file );
$image = imagecreatefromstring( $contents );
$image = @imagecreatefromstring( @file_get_contents( $file ) );
if ( !is_resource( $image ) )
return sprintf(__("File '%s' is not an image."), $file);
@ -180,13 +183,43 @@ function wp_load_image( $file ) {
return $image;
}
/**
* get_udims() - Calculated the new dimentions for downsampled images
*
* @package WordPress
* @internal Missing Description
* @see wp_shrink_dimensions()
* @param int $width Current width of the image
* @param int $height Current height of the image
* @return mixed Array(height,width) of shrunk dimensions.
*
*/
function get_udims( $width, $height) {
return wp_shrink_dimensions( $width, $height );
}
/**
* wp_shrink_dimensions() - Calculates the new dimentions for a downsampled image.
*
* @package WordPress
* @internal Missing Long Description
* @param int $width Current width of the image
* @param int $height Current height of the image
* @param int $wmax Maximum wanted width
* @param int $hmax Maximum wanted height
* @return mixed Array(height,width) of shrunk dimensions.
*
*/
function wp_shrink_dimensions( $width, $height, $wmax = 128, $hmax = 96 ) {
if ( $height <= $hmax && $width <= $wmax )
if ( $height <= $hmax && $width <= $wmax ){
//Image is smaller than max
return array( $width, $height);
elseif ( $width / $height > $wmax / $hmax )
} elseif ( $width / $height > $wmax / $hmax ) {
//Image Width will be greatest
return array( $wmax, (int) ($height / $width * $wmax ));
else
} else {
//Image Height will be greatest
return array( (int) ($width / $height * $hmax ), $hmax );
}
}
?>

11
wp-includes/compat.php
View File

@ -147,4 +147,15 @@ if (!function_exists('stripos')) {
}
}
// Added in PHP 4.3.0?
if (!defined('IMAGETYPE_GIF'))
define('IMAGETYPE_GIF', 1);
if (!defined('IMAGETYPE_JPEG'))
define('IMAGETYPE_JPEG', 2);
if (!defined('IMAGETYPE_PNG'))
define('IMAGETYPE_PNG', 3);
?>