4 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	957f710b91	Render random circles ... Poor performance but it renders something.	2020-04-17 21:18:39 -07:00
Raph Levien	6a3f890b58	[derive] Add Rust encoding of structs ... This also requires some traits and structs in an `encode` module (the one in piet-metal/piet-gpu-types works, and was used to test).	2020-04-14 20:47:41 -07:00