NAME

       wayland::server::viewporter_t - surface cropping and scaling

SYNOPSIS

       #include <wayland-server-protocol-extra.hpp>

       Inherits wayland::server::resource_t.

   Public Member Functions
       std::function< void()> & on_destroy ()
           unbind from the cropping and scaling interface
       std::function< void(viewport_t, surface_t)> & on_get_viewport ()
           extend surface interface for crop and scale
       void post_viewport_exists (std::string const &msg)
           Post error: the surface already has a viewport object associated.
       bool proxy_has_object () const
           Check whether this wrapper actually wraps an object.
       void post_no_memory () const
       uint32_t get_id () const
       client_t get_client () const
       unsigned int get_version () const
       std::string get_class ()

Detailed Description

       surface cropping and scaling

       The global interface exposing surface cropping and scaling capabilities is used to
       instantiate an interface extension for a wl_surface object. This extended interface will
       then allow cropping and scaling the surface contents, effectively disconnecting the direct
       relationship between the buffer and the surface size.

       Definition at line 361 of file wayland-server-protocol-extra.hpp.

Member Function Documentation

   std::string wayland::server::resource_t::get_class () [inherited]
       Retrieve the interface name (class) of a resource object.

       Returns
           Interface name of the resource object.

   client_t wayland::server::resource_t::get_client () const [inherited]
       Get the associated client

       Returns
           the client that owns the resource.

   uint32_t wayland::server::resource_t::get_id () const [inherited]
       Get the internal ID of the resource

       Returns
           the internal ID of the resource

   unsigned int wayland::server::resource_t::get_version () const [inherited]
       Get interface version

       Returns
           Interface version this resource has been constructed with.

   std::function< void()> & viewporter_t::on_destroy ()
       unbind from the cropping and scaling interface Informs the server that the client will not
       be using this protocol object anymore. This does not affect any other objects, wp_viewport
       objects included.

       Definition at line 796 of file wayland-server-protocol-extra.cpp.

   std::function< void(viewport_t, surface_t)> & viewporter_t::on_get_viewport ()
       extend surface interface for crop and scale

       Parameters
           id the new viewport interface id
           surface the surface

       Instantiate an interface extension for the given wl_surface to crop and scale its content.
       If the given wl_surface already has a wp_viewport object associated, the viewport_exists
       protocol error is raised.

       Definition at line 802 of file wayland-server-protocol-extra.cpp.

   void wayland::server::resource_t::post_no_memory () const [inherited]
       Post 'not enough memory' error to the client

       If the compositor has not enough memory to fulfill a certail request of the client, this
       function can be called to notify the client of this circumstance.

   void viewporter_t::post_viewport_exists (std::string const & msg)
       Post error: the surface already has a viewport object associated.

       Definition at line 808 of file wayland-server-protocol-extra.cpp.

   bool wayland::server::resource_t::proxy_has_object () const [inherited]
       Check whether this wrapper actually wraps an object.

       Returns
           true if there is an underlying object, false if this wrapper is empty

Author

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