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glx22
reviewed
Jan 31, 2023
This does not include the D8xx text area extension.
glx22
approved these changes
Jan 31, 2023
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nml spec updated https://newgrf-specs.tt-wiki.net/wiki/NML:Vehicles#Vehicle_callbacks |
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Description
See OpenTTD/OpenTTD#10399.
Add basic support for the engine name callback and the extended callback flag properties.
Limitations
To make full use of the name callback in view of the limited D0xx text are that is available as a callback results, the OpenTTD PR also increases the D8xx text are up to FFFF (using up some TTDpatch specific IDs). Inclusion via the text stack and codes 80/81 can use all IDs and thus also D8xx.
So far, NML can not make use of this though, as all strings that are referred from Action 2s seem to be strictly allocated into the D0xx area. Reworking this is above my pay grade and thus not part of this PR.