5 commits

Author	SHA1	Message	Date
Raph Levien	9afa9b86b6	Add encoding of flags into tag ... Add a `TagFlags` type. You can write enum variants as `Variant(TagFlags, Content)` and this will encode a u16 into the top 16 bits of the tag word.	2021-03-02 11:56:02 -08:00
Brian Merchant	3270ee64c2	Add f16 support. ... Handling f16 requires special work, compared to other scalars, as the minimum conversion operation for u32->f16 in GLSL (unpackHalf2x16) loads two f16s from one u32. This means that in order to minimize unnecessary calls to unpackHalf2x16, we should look-ahead to see if the current f16 has already been extracted in the process of dealing with the last f16. Similar considerations exist for write operations, where we want to pack, when possible, two f16s in one go (using packHalf2x16).	2020-04-21 15:03:06 -07:00
Raph Levien	e86ea9eff4	[derive] Add writers, enums ... This adds shader generation of writers (and cleans up some other things) and much better support for enums.	2020-04-14 15:06:49 -07:00
Raph Levien	265d990cbe	[derive] Add layout ... Add a layout pass to the struct derive logic.	2020-04-12 16:44:28 -07:00
Raph Levien	afd47a7edd	Start piet-gpu-derive ... This version will be similar but somewhat different to what's in piet-metal now. Hopefully a little simpler to use (no distinction between packed and unpacked structs) and better structured.	2020-04-07 21:44:48 -07:00