Hello Jeremy,
Not sure if there is a single function and I'm no expert on the mipmap
cache circuitry. But I know that
the following sequence does initialize the cache for the lightable preview:
dt_mipmap_buffer_t buf;
dt_mipmap_cache_read_get(darktable.mipmap_cache, &buf, imgid,
DT_MIPMAP_0, DT_MIPMAP_BEST_EFFORT);
if(buf.buf)
dt_mipmap_cache_read_release(darktable.mipmap_cache, &buf);
So that's 2 functions, a struct and some constants (DT_MIPMAP_*).
How does that sounds?
Have a good day!
--
Pascal Obry / Magny Les Hameaux (78)
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http://www.obry.net
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