Provide plugins a way of preventing Photon from being applied to images retrieved from WordPress Core.
jetpack_photon_override_image_downsize
jetpack_photon_override_image_downsize-
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filter jetpack_photon_post_image_argsFilter the array of Photon arguments added to an image when it goes through Photon. By default, only includes width and height values.
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filter jetpack_photon_image_is_localFilter whether an image using an attachment ID in its class has to be uploaded to the local site to go through Photon.
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filter jetpack_photon_skip_imageAllow specific images to be skipped by Photon.
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filter tonesque_image_urlAllows any image URL to be passed in for $this->image_url.
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action jetpack_noticesThis action is documented in class.jetpack.php
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action jetpack_notices_update_settings_{$module_id}Fires within the displayed message when a feature configuation is updated.This is a dynamic hook with $module_id being the slug of the module being updated.
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action jetpack_admin_menuThis action is documented in class.jetpack.php
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filter jetpack_landing_page_js_templates_callbackFilters the js_templates callback value
Jetpack Developer Resources 