[ CCode ( cname = "hb_buffer_message_func_t" , instance_pos = 3.9 ) ]
public delegate Bool BufferMessageFunc (Buffer buffer, Font font, string message)
A callback method for Buffer.
The method gets called with the Buffer it was set on, the Font the buffer is shaped with and a message describing what step of the shaping process will be performed. Returning `false` from this method will skip this shaping step and move to the next one.
| buffer |
An Buffer to work upon |
| font |
The Font the |
| message |
`NULL`-terminated message passed to the function |
| user_data |
User data pointer passed by the caller |
|
`true` to perform the shaping step, `false` to skip it. |