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You shouldn’t have to edit the core files at all. I had to whip up something similar today for a client which you may find helpful.

What it does is replace the email that is used to access the gravatar with a different one. I recommend you replace the default email template with your domain, so, the gravatar will remain persistant if it’s an identicon or wavatar:

class DisableUserGravatar {



var $email_template = "member.%USER%@yourwebsite.com";



function DisableUserGravatar(){

add_filter('get_avatar', array(&$this, 'wp_avatar'), 1, 5);

add_filter( 'bp_core_fetch_avatar', array(&$this, 'bp_avatar'), 1, 3);

}



function wp_avatar( $content, $id_or_email){

if( preg_match( "/gravatar.com/", $content ) ){

if ( is_numeric($id_or_email) ) {

$id = (int) $id_or_email;

$user = get_userdata($id);

} elseif ( is_object($id_or_email) ) {

if ( !empty($id_or_email->user_id) ) {

$id = (int) $id_or_email->user_id;

$user = get_userdata($id);

} elseif ( !empty($id_or_email->comment_author_email) ) {

return $content; //Commenters not logged in don't need filtering

}

} else {

$user = get_user_by_email($id_or_email);

}

if(!$user) return $content;

$username = $user->user_login;

$email = md5( str_replace('%USER%', $username, $this->email_template) );

return preg_replace("/gravatar.com\/avatar\/(.+)\?/", "gravatar.com/avatar/{$email}?", $content);

}

return $content;

}



function bp_avatar( $content, $params ){

if( is_array($params) && $params['object'] == 'user' ){

return $this->wp_avatar($content, $params['item_id']);

}

return $content;

}



}



global $DisableUserGravatar;

$DisableUserGravatar = new DisableUserGravatar();

Create a file in wp-content/mu-plugins with the content above.

I’ll put this up on wordpress.org as a plugin.

For avatar, you can specify custom avatar size using bp_core_fetch_avatar() function,but in that case either you will have to edit the sitewide activity widget(Not a good idea) or use custom loops.

for images inside activity content,I will suggest,use css for that.You can target images inside activity using css and set a height/width.

It is just an easy workaround,I can recall for now.There may be other approaches using php.

@ John James Jacoby,

I had a look in the bp-events-avatar.php to understand more what’s going on there.

I’m thinking the avatar part could be like it is now.

It would be enough, if the original resized image would be available.

I did some changes to the bp-events-avatar.php and make a plugin from it.

For the moment, I will use the modified functions in custom components until you offer a better way to do it. I think it would be really great if the original resized image would be saved by the core.

Be careful!

This Plugin is just a play around on a fun buddypress installation.

<?php

/*

Plugin Name:bp-events-avatar

Description: This plugin add a template tag  bp_event_flyer() to display the event flyer

Version: 0.0.1

License: GPL

*/



function bp_event_flyer( $args = '' ) {

echo bp_get_event_flyer( $args );

}

function bp_get_event_flyer( $args = '' ) {

global $bp, $events_template;



$defaults = array(

'type' => 'org',

'width' => 'auto',

'height' => 'auto',

'class' => 'avatar',

'id' => false,

'alt' => __( 'Event avatar', 'bp-events' )

);



$r = wp_parse_args( $args, $defaults );

extract( $r, EXTR_SKIP );



/* Fetch the avatar from the folder, if not provide backwards compat. */

if ( !$avatar = bp_event_fetch_avatar( array( 'item_id' => $events_template->event->id, 'object' => 'event', 'type' => $type, 'avatar_dir' => 'event-avatars', 'alt' => $alt, 'css_id' => $id, 'class' => $class, 'width' => $width, 'height' => $height ) ) )

$avatar = '<img src="' . attribute_escape( $events_template->event->avatar_thumb ) . '" class="avatar" alt="' . attribute_escape( $events_template->event->name ) . '" />';



return apply_filters( 'bp_get_event_flyer', $avatar );

}



/*

Based on contributions from: Beau Lebens - http://www.dentedreality.com.au/

Modified for BuddyPress by: Andy Peatling - http://apeatling.wordpress.com/

*/



/***

* Set up the constants we need for avatar support

*/



if ( !defined( 'BP_AVATAR_THUMB_WIDTH' ) )

define( 'BP_AVATAR_THUMB_WIDTH', 50 );



if ( !defined( 'BP_AVATAR_THUMB_HEIGHT' ) )

define( 'BP_AVATAR_THUMB_HEIGHT', 50 );



if ( !defined( 'BP_AVATAR_FULL_WIDTH' ) )

define( 'BP_AVATAR_FULL_WIDTH', 150 );



if ( !defined( 'BP_AVATAR_FULL_HEIGHT' ) )

define( 'BP_AVATAR_FULL_HEIGHT', 150 );



if ( !defined( 'BP_AVATAR_ORIGINAL_MAX_WIDTH' ) )

define( 'BP_AVATAR_ORIGINAL_MAX_WIDTH', 450 );



if ( !defined( 'BP_AVATAR_ORIGINAL_MAX_FILESIZE' ) )

define( 'BP_AVATAR_ORIGINAL_MAX_FILESIZE', get_site_option( 'fileupload_maxk' ) * 1024 );



if ( !defined( 'BP_AVATAR_DEFAULT' ) )

define( 'BP_AVATAR_DEFAULT', BP_PLUGIN_URL . '/bp-xprofile/images/none.gif' );



if ( !defined( 'BP_AVATAR_DEFAULT_THUMB' ) )

define( 'BP_AVATAR_DEFAULT_THUMB', BP_PLUGIN_URL . '/bp-xprofile/images/none-thumbnail.gif' );



function bp_event_fetch_avatar( $args = '' ) {

global $bp, $current_blog;



$defaults = array(

'item_id' => false,

'object' => 'user', // user OR group OR blog OR custom type (if you use filters)

'type' => 'thumb',

'avatar_dir' => false,

'width' => false,

'height' => false,

'class' => 'avatar',

'css_id' => false,

'alt' => __( 'Avatar Image', 'buddypress' ),

'no_grav' => false // If there is no avatar found, return false instead of a grav?

);



$params = wp_parse_args( $args, $defaults );

extract( $params, EXTR_SKIP );



if ( !$item_id ) {

if ( 'user' == $object )

$item_id = $bp->displayed_user->id;

else if ( 'group' == $object )

$item_id = $bp->groups->current_group->id;

else if ( 'blog' == $object )

$item_id = $current_blog->id;



$item_id = apply_filters( 'bp_core_avatar_item_id', $item_id, $object );



if ( !$item_id ) return false;

}



if ( !$avatar_dir ) {

if ( 'user' == $object )

$avatar_dir = 'avatars';

else if ( 'group' == $object )

$avatar_dir = 'group-avatars';

else if ( 'blog' == $object )

$avatar_dir = 'blog-avatars';



$avatar_dir = apply_filters( 'bp_core_avatar_dir', $avatar_dir, $object );



if ( !$avatar_dir ) return false;

}



if ( !$css_id )

$css_id = $object . '-' . $item_id . '-avatar';



if ( $width )

$html_width = " width='{$width}'";

else

$html_width = ( 'thumb' == $type ) ? ' width="' . BP_AVATAR_THUMB_WIDTH . '"' : ' width="' . BP_AVATAR_FULL_WIDTH . '"';



if ( $height )

$html_height = " height='{$height}'";

else

$html_height = ( 'thumb' == $type ) ? ' height="' . BP_AVATAR_THUMB_HEIGHT . '"' : ' height="' . BP_AVATAR_FULL_HEIGHT . '"';



$avatar_folder_url = apply_filters( 'bp_core_avatar_folder_url', get_blog_option( BP_ROOT_BLOG, 'siteurl' ) . '/' . basename( WP_CONTENT_DIR ) . '/blogs.dir/' . BP_ROOT_BLOG . '/files/' . $avatar_dir . '/' . $item_id, $item_id, $object, $avatar_dir );

$avatar_folder_dir = apply_filters( 'bp_core_avatar_folder_dir', WP_CONTENT_DIR . '/blogs.dir/' . BP_ROOT_BLOG . '/files/' . $avatar_dir . '/' . $item_id, $item_id, $object, $avatar_dir );



/* If no avatars have been uploaded for this item, display a gravatar */

if ( !file_exists( $avatar_folder_dir ) && !$no_grav ) {



if ( empty( $bp->grav_default->{$object} ) )

$default_grav = 'wavatar';

else if ( 'mystery' == $bp->grav_default->{$object} )

$default_grav = BP_PLUGIN_URL . '/bp-core/images/mystery-man.jpg';

else

$default_grav = $bp->grav_default->{$object};



if ( $width ) $grav_size = $width;

else if ( 'full' == $type ) $grav_size = BP_AVATAR_FULL_WIDTH;

else if ( 'thumb' == $type ) $grav_size = BP_AVATAR_THUMB_WIDTH;



if ( 'user' == $object ) {

$ud = get_userdata( $item_id );

$grav_email = $ud->user_email;

} else if ( 'group' == $object || 'blog' == $object ) {

$grav_email = "{$item_id}-{$object}@{$bp->root_domain}";

}



$grav_email = apply_filters( 'bp_core_gravatar_email', $grav_email, $item_id, $object );

$gravatar = apply_filters( 'bp_gravatar_url', 'https://secure.gravatar.com/avatar/' ) . md5( $grav_email ) . '?d=' . $default_grav . '&s=' . $grav_size;



return apply_filters( 'bp_core_fetch_avatar', "<img src='{$gravatar}' alt='{$alt}' id='{$css_id}' class='{$class}'{$html_width}{$html_height} />", $params );



} else if ( !file_exists( $avatar_folder_dir ) && $no_grav )

return false;



/* Set the file names to search for to select the full size or thumbnail image. */

$avatar_name = ( 'org' == $type ) ? '-bporg' : '-bpthumb';

$avatar_name = ( 'full' == $type ) ? '-bpfull' : $avatar_name;

$legacy_user_avatar_name = ( 'full' == $type ) ? '-avatar2' : '-avatar1';

$legacy_group_avatar_name = ( 'full' == $type ) ? '-groupavatar-full' : '-groupavatar-thumb';



if ( $av_dir = opendir( $avatar_folder_dir ) ) {

while ( false !== ( $avatar_file = readdir($av_dir) ) ) {

if ( preg_match( "/{$avatar_name}/", $avatar_file ) || preg_match( "/{$legacy_user_avatar_name}/", $avatar_file ) || preg_match( "/{$legacy_group_avatar_name}/", $avatar_file ) )

$avatar_url = $avatar_folder_url . '/' . $avatar_file;

}

}

closedir($av_dir);



return apply_filters( 'bp_core_fetch_avatar', "<img src='{$avatar_url}' alt='{$alt}' id='{$css_id}' class='{$class}'{$html_width}{$html_height} />", $params );

}



function bp_events_delete_existing_avatar( $args = '' ) {

global $bp;



$defaults = array(

'item_id' => false,

'object' => 'user', // user OR group OR blog OR custom type (if you use filters)

'avatar_dir' => false

);



$args = wp_parse_args( $args, $defaults );

extract( $args, EXTR_SKIP );



if ( !$item_id ) {

if ( 'user' == $object )

$item_id = $bp->displayed_user->id;

else if ( 'group' == $object )

$item_id = $bp->groups->current_group->id;

else if ( 'blog' == $object )

$item_id = $current_blog->id;



$item_id = apply_filters( 'bp_core_avatar_item_id', $item_id, $object );



if ( !$item_id ) return false;

}



if ( !$avatar_dir ) {

if ( 'user' == $object )

$avatar_dir = 'avatars';

else if ( 'group' == $object )

$avatar_dir = 'group-avatars';

else if ( 'blog' == $object )

$avatar_dir = 'blog-avatars';



$avatar_dir = apply_filters( 'bp_core_avatar_dir', $avatar_dir, $object );



if ( !$avatar_dir ) return false;

}



if ( 'user' == $object ) {

/* Delete any legacy meta entries if this is a user avatar */

delete_usermeta( $item_id, 'bp_core_avatar_v1_path' );

delete_usermeta( $item_id, 'bp_core_avatar_v1' );

delete_usermeta( $item_id, 'bp_core_avatar_v2_path' );

delete_usermeta( $item_id, 'bp_core_avatar_v2' );

}



$avatar_folder_dir = apply_filters( 'bp_core_avatar_folder_dir', WP_CONTENT_DIR . '/blogs.dir/' . BP_ROOT_BLOG . '/files/' . $avatar_dir . '/' . $item_id, $item_id, $object, $avatar_dir );



if ( !file_exists( $avatar_folder_dir ) )

return false;



if ( $av_dir = opendir( $avatar_folder_dir ) ) {

while ( false !== ( $avatar_file = readdir($av_dir) ) ) {

if ( ( preg_match( "/-bpfull/", $avatar_file ) || preg_match( "/-bpthumb/", $avatar_file ) || preg_match( "/-bporg/", $avatar_file ) ) && '.' != $avatar_file && '..' != $avatar_file )

@unlink( $avatar_folder_dir . '/' . $avatar_file );

}

}

closedir($av_dir);



@rmdir( $avatar_folder_dir );



do_action( 'bp_core_delete_existing_avatar', $args );



return true;

}



function bp_events_avatar_handle_crop( $args = '' ) {

global $bp;

$defaults = array(

'object' => 'user',

'avatar_dir' => 'avatars',

'item_id' => false,

'original_file' => false,

'crop_w' => BP_AVATAR_FULL_WIDTH,

'crop_h' => BP_AVATAR_FULL_HEIGHT,

'crop_x' => 0,

'crop_y' => 0

);



$r = wp_parse_args( $args, $defaults );

extract( $r, EXTR_SKIP );



if ( !$original_file )

return false;



if ( !file_exists( WP_CONTENT_DIR . '/' . $original_file ) )

return false;



if ( !$item_id )

$avatar_folder_dir = apply_filters( 'bp_core_avatar_folder_dir', WP_CONTENT_DIR . dirname( $original_file ), $item_id, $object, $avatar_dir );

else

$avatar_folder_dir = apply_filters( 'bp_core_avatar_folder_dir', WP_CONTENT_DIR . '/blogs.dir/' . BP_ROOT_BLOG . '/files/' . $avatar_dir . '/' . $item_id, $item_id, $object, $avatar_dir );



if ( !file_exists( $avatar_folder_dir ) )

return false;



require_once( ABSPATH . '/wp-admin/includes/image.php' );

require_once( ABSPATH . '/wp-admin/includes/file.php' );



/* Delete the existing avatar files for the object */

bp_core_delete_existing_avatar( array( 'object' => $object, 'avatar_path' => $avatar_folder_dir ) );



/* Make sure we at least have a width and height for cropping */

if ( !(int)$crop_w )

$crop_w = BP_AVATAR_FULL_WIDTH;



if ( !(int)$crop_h )

$crop_h = BP_AVATAR_FULL_HEIGHT;



/* Set the full and thumb filenames */

$full_filename = wp_hash( $original_file . time() ) . '-bpfull.jpg';

$thumb_filename = wp_hash( $original_file . time() ) . '-bpthumb.jpg';

$org_filename = wp_hash( $original_file . time() ) . '-bporg.jpg';



/* Crop the image */

$full_cropped = wp_crop_image( WP_CONTENT_DIR . $original_file, (int)$crop_x, (int)$crop_y, (int)$crop_w, (int)$crop_h, BP_AVATAR_FULL_WIDTH, BP_AVATAR_FULL_HEIGHT, false, $avatar_folder_dir . '/' . $full_filename );

$thumb_cropped = wp_crop_image( WP_CONTENT_DIR . $original_file, (int)$crop_x, (int)$crop_y, (int)$crop_w, (int)$crop_h, BP_AVATAR_THUMB_WIDTH, BP_AVATAR_THUMB_HEIGHT, false, $avatar_folder_dir . '/' . $thumb_filename );

rename (WP_CONTENT_DIR . $original_file, $avatar_folder_dir . '/' . $org_filename );

/* Remove the original */

@unlink( WP_CONTENT_DIR . $original_file );



return true;

}

?>

In the moment, I do what Andy has offered above.

Members:

<?php echo bp_core_fetch_avatar(

'item_id=' . get_the_author_id() . '&type=full&width=100&height=100' ) ?>

Groups:

<?php echo bp_core_fetch_avatar( 'item_id=' . bp_get_the_site_group_id()

. '&object=group&type=full&width=100&height=100' ) ?>

Just I think this is the same as doing it in the css.

I like to know how to change the original size at the moment when its created.

But I don’t want to define these with custom values in wp-config.php.

I’m looking for a solution to have control of the Avatar size in custom components.

for example: In the bp-events Plugin, I would like to change the Avatar format to a Flyer format.

Most of the Event Flyer, people want to upload, do not feed the Avatar size from Buddypress.

So they just get a cuted piece of there flayer.

I relay would like to change this.

<?php echo bp_core_fetch_avatar( 'item_id=' . get_the_author_id() . '&type=full&width=125&height=125' ) ?>

BuddyPress 1.1.x only.