Method

MaplibreNativeFfiRenderSessionread_texture_async

Declaration [src] 

void
maplibre_native_ffi_render_session_read_texture_async (
  MaplibreNativeFfiRenderSession* self,
  GAsyncReadyCallback callback,
  gpointer user_data
)

Description [src]

Reads the pixels of the last frame that the session rendered.

See mln_render_session_read_texture in the C API reference.

It fails with these errors:

  • MAPLIBRE_NATIVE_FFI_ERROR_UNSUPPORTED when the session’s capabilities lack MAPLIBRE_NATIVE_FFI_RENDER_SESSION_CAPABILITY_READBACK.
  • MAPLIBRE_NATIVE_FFI_ERROR_INVALID_STATE when the session hasn’t rendered a frame since it attached, resized, or changed its target.

This method completes asynchronously. Use maplibre_native_ffi_render_session_read_texture_finish() inside the GAsyncReadyCallback to obtain the result of the operation.

Parameters

callback

Type: GAsyncReadyCallback

The callback to call when the call finishes.

The argument can be NULL.
user_data

Type: gpointer

The data to pass to callback.

The argument can be NULL.
The data is owned by the caller of the method.