GD in WordPress

GD_in_WordPress.txt

# GD in WordPress
From: http://www.php.net/manual/en/ref.image.php

## Functions Used:
* getimagesize
* imagealphablending
* imageantialias
* imagecolorstotal
* imagecopy
* imagecopyresampled
* imagecreatefromgif
* imagecreatefromjpeg
* imagecreatefrompng 
* imagecreatefromstring
* imagecreatetruecolor
* imagedestroy
* imagegif
* imageistruecolor
* imagejpeg
* imagepng
* imagerotate
* imagesavealpha
* imagesx
* imagesy
* imagetruecolortopalette
* imagetypes
* iptcparse

## Details:
* getimagesize 
(svn :21358M ) macNull:wpbranch mike$ ack getimagesize 
wp-admin/custom-header.php
699:			list( $width, $height, $type, $attr ) = getimagesize( $file );
872:		$size = @getimagesize( $cropped );

wp-admin/includes/image.php
56:			$size = @getimagesize( $src_file );
61:		$size = @getimagesize( $src );
117:		$imagesize = getimagesize( $file );
227:	list( , , $sourceImageType ) = getimagesize( $file );
249:		getimagesize( $file, $info );
343:	$size = @getimagesize($path);
357:	$info = @getimagesize($path);

wp-includes/deprecated.php
1980:		$imagesize = getimagesize($src_file);

wp-includes/functions.php
1694: * Currently this function only supports validating images known to getimagesize().
1716:	if ( $type && 0 === strpos( $type, 'image/' ) && function_exists('getimagesize') ) {
1719:		$imgstats = @getimagesize( $file );
1721:		// If getimagesize() knows what kind of image it really is and if the real MIME doesn't match the claimed MIME
1723:			// This is a simplified array of MIMEs that getimagesize() can detect and their extensions
1725:			$mime_to_ext = apply_filters( 'getimagesize_mimes_to_exts', array(

wp-includes/media.php
155:		if ( ($thumb_file = wp_get_attachment_thumb_file($id)) && $info = getimagesize($thumb_file) ) {
423:	$size = @getimagesize( $file );
499:		if ( !is_wp_error($resized_file) && $resized_file && $info = getimagesize($resized_file) ) {
624:		@list($width, $height) = getimagesize($src_file);

* imagealphablending
 (svn :21358M ) macNull:wpbranch mike$ ack imagealphablending 
wp-admin/includes/image.php
399:		if ( function_exists('imagealphablending') && function_exists('imagesavealpha') ) {
400:			imagealphablending($image, false);

wp-includes/media.php
1026:	if ( is_resource($img) && function_exists('imagealphablending') && function_exists('imagesavealpha') ) {
1027:		imagealphablending($img, false);

* imageantialias
 (svn :21358M ) macNull:wpbranch mike$ ack imageantialias
wp-admin/includes/image.php
76:	if ( function_exists( 'imageantialias' ) )
77:		imageantialias( $dst, true );

* imagecolorstotal
 (svn :21358M ) macNull:wpbranch mike$ ack imagecolorstotal
wp-includes/media.php
439:		imagetruecolortopalette( $newimage, false, imagecolorstotal( $image ) );

* imagecopy
 (svn :21358M ) macNull:wpbranch mike$ ack imagecopy
wp-admin/includes/image-edit.php
273:		if ( imagecopy($dst, $img, 0, 0, $x, $y, $w, $h) ) {

* imagecopyresampled
 (svn :21358M ) macNull:wpbranch mike$ ack imagecopyresampled
wp-admin/includes/image-edit.php
262:		if ( imagecopyresampled($dst, $img, 0, 0, $sx, $sy, $w, $h, $sw, $sh) ) {
372:	imagecopyresampled( $preview, $img, 0, 0, 0, 0, $w2, $h2, $w, $h );
481:			if ( imagecopyresampled( $dst, $img, 0, 0, 0, 0, $fwidth, $fheight, $sX, $sY ) ) {

wp-admin/includes/image.php
79:	imagecopyresampled( $dst, $src, 0, 0, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h );

wp-includes/media.php
323: * Retrieve calculated resized dimensions for use in imagecopyresampled().
338: * @return bool|array False on failure. Returned array matches parameters for imagecopyresampled() PHP function.
389:	// the return array matches the parameters to imagecopyresampled()
435:	imagecopyresampled( $newimage, $image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h);

* imagecreatefromgif
 (svn :21358M ) macNull:wpbranch mike$ ack imagecreatefromgif
wp-admin/includes/image.php
391:			$image = imagecreatefromgif($filepath);

wp-includes/media.php
1009:				return function_exists('imagecreatefromgif');

* imagecreatefromjpeg
 (svn :21358M ) macNull:wpbranch mike$ ack imagecreatefromjpeg
wp-admin/includes/image.php
385:			$image = imagecreatefromjpeg($filepath);

wp-includes/media.php
1005:				return function_exists('imagecreatefromjpeg');

* imagecreatefrompng 
(svn :21358M ) macNull:wpbranch mike$ ack imagecreatefrompng
wp-admin/includes/image.php
388:			$image = imagecreatefrompng($filepath);

wp-includes/media.php
1007:				return function_exists('imagecreatefrompng');

* imagecreatefromstring
 (svn :21358M ) macNull:wpbranch mike$ ack imagecreatefromstring
wp-includes/media.php
253:	if ( ! function_exists('imagecreatefromstring') )
258:	$image = imagecreatefromstring( file_get_contents( $file ) );

* imagecreatetruecolor
 (svn :21358M ) macNull:wpbranch mike$ ack imagecreatetruecolor
wp-includes/media.php
1025:	$img = imagecreatetruecolor($width, $height);

* imagedestroy
 (svn :21358M ) macNull:wpbranch mike$ ack imagedestroy
wp-admin/includes/image-edit.php
245:			imagedestroy($img);
263:			imagedestroy($img);
274:			imagedestroy($img);
375:	imagedestroy($preview);
376:	imagedestroy($img);
482:				imagedestroy($img);
623:	imagedestroy($img);

wp-admin/includes/image.php
81:	imagedestroy( $src ); // Free up memory

wp-includes/media.php
442:	imagedestroy( $image );
471:	imagedestroy( $newimage );

* imagegif
 (svn :21358M ) macNull:wpbranch mike$ ack imagegif
wp-admin/includes/image-edit.php
212:			return imagegif($image);
230:			return imagegif($image, $filename);

wp-includes/media.php
458:		if ( !imagegif( $newimage, $destfilename ) )

* imageistruecolor
 (svn :21358M ) macNull:wpbranch mike$ ack imageistruecolor
wp-includes/media.php
438:	if ( IMAGETYPE_PNG == $orig_type && function_exists('imageistruecolor') && !imageistruecolor( $image ) )

* imagejpeg
(svn :21358M ) macNull:wpbranch mike$ ack imagejpeg
wp-admin/includes/image-edit.php
206:			return imagejpeg($image, null, 90);
226:			return imagejpeg( $image, $filename, apply_filters( 'jpeg_quality', 90, 'edit_image' ) );

wp-admin/includes/image.php
97:	elseif ( imagejpeg( $dst, $dst_file, apply_filters( 'jpeg_quality', 90, 'wp_crop_image' ) ) )

wp-includes/media.php
467:		if ( !imagejpeg( $newimage, $destfilename, apply_filters( 'jpeg_quality', $jpeg_quality, 'image_resize' ) ) )

* imagepng
 (svn :21358M ) macNull:wpbranch mike$ ack imagepng
wp-admin/includes/image-edit.php
209:			return imagepng($image);
228:			return imagepng($image, $filename);

wp-admin/includes/image.php
95:	if ( 'image/png' == $image_type && imagepng( $dst, $dst_file ) )

wp-includes/media.php
461:		if ( !imagepng( $newimage, $destfilename ) )

* imagerotate
 (svn :21358M ) macNull:wpbranch mike$ ack imagerotate
wp-admin/includes/image-edit.php
42:	// On some setups GD library does not provide imagerotate() - Ticket #11536
43:	if ( function_exists('imagerotate') ) { ?>
47:		$note_gdlib = esc_attr__('Image rotation is not supported by your web host (function imagerotate() is missing)');
242:	if ( function_exists('imagerotate') ) {
243:		$rotated = imagerotate($img, $angle, 0);

* imagesavealpha
 (svn :21358M ) macNull:wpbranch mike$ ack imagesavealpha
wp-admin/includes/image.php
399:		if ( function_exists('imagealphablending') && function_exists('imagesavealpha') ) {
401:			imagesavealpha($image, true);

wp-includes/media.php
1026:	if ( is_resource($img) && function_exists('imagealphablending') && function_exists('imagesavealpha') ) {
1028:		imagesavealpha($img, true);

* imagesx
 (svn :21358M ) macNull:wpbranch mike$ ack imagesx
wp-admin/includes/image-edit.php
253:	$w = imagesx($img);
343:				$scale = 1 / _image_get_preview_ratio( imagesx($img), imagesy($img) ); // discard preview scaling
365:	$w = imagesx($img);
473:		$sX = imagesx($img);
559:		$meta['width'] = imagesx($img);

* imagesy
 (svn :21358M ) macNull:wpbranch mike$ ack imagesy
wp-admin/includes/image-edit.php
254:	$h = imagesy($img);
343:				$scale = 1 / _image_get_preview_ratio( imagesx($img), imagesy($img) ); // discard preview scaling
366:	$h = imagesy($img);
474:		$sY = imagesy($img);
560:		$meta['height'] = imagesy($img);

* imagetruecolortopalette
 (svn :21358M ) macNull:wpbranch mike$ ack imagetruecolortopalette
wp-includes/media.php
439:		imagetruecolortopalette( $newimage, false, imagecolorstotal( $image ) );

* imagetypes
 (svn :21358M ) macNull:wpbranch mike$ ack imagetypes
wp-includes/media.php
993:	if ( function_exists('imagetypes') ) {
996:				return (imagetypes() & IMG_JPG) != 0;
998:				return (imagetypes() & IMG_PNG) != 0;
1000:				return (imagetypes() & IMG_GIF) != 0;

* iptcparse
 (svn :21358M ) macNull:wpbranch mike$ ack iptcparse 
wp-admin/includes/image.php
248:	if ( is_callable( 'iptcparse' ) ) {
252:			$iptc = iptcparse( $info['APP13'] );