Current status: the piet-gpu-hal module (including the collatz example)
have the new API (with queries set on compute pass) implemented. The
other uses have not yet been updated.
On Metal, only M1 is tested. The "command" counter style is partly
implemented, but not fully wired up.
Also updates comment.
We know the implementation is incomplete and needs refinement, but it
seems useful to commit as a starting point for further work.
This patch includes a number of changes to encourage reading and writing
buffers through mapping rather than copying data as before.
This includes a new `BufWrite` abstraction which is designed for filling
buffers. It behaves much like a Vec<u8>, but with fixed capacity.
Reduce allocation of descriptor heaps. This change also enables clearing
of buffers, as the handles are needed at command dispatch time.
Also updates the tests to use clear_buffers on DX12. Looking forward to
being able to get rid of the compute shader workaround on Metal.
This is a followup on #125, and progress toward #95
Integrate DXC for translating HLSL for use in DX12. This will work
around FXC limitations and unlock the use of more advanced HLSL features
such as subgroups.
This hardcodes the use of DXIL, but it could be adapted (with a bit of
effort) to choose between DXIL and HLSL at runtime.
This gets it working on mac. Also delete old implementation.
There's also an update to winit 0.25 in here, because it was easier to
roll forward than fix inconsistent Cargo.lock. At some point, we should
systematically update all deps.
Use an array of bindtypes rather than the previous situation, which was
a choice of buffer counts, or a heavier builder pattern.
The main thing this unlocks is distinguishing between readonly and
read/write buffers, which is important for DX12.
This is WIP, the Metal part hasn't been done, and the old stuff not
deleted.
Part of #125
Reuse submitted command buffers rather than continually allocating them.
This patch also improves the story across the different backends. On
DX12 it was reusing allocators without resetting them, which could be a
leak. And on Metal the reset "fails," so there's always a new alloc.
This patch gets rid of warnings and runs cargo fmt.
A lot of the warnings were unused items (especially in DX12 land). At
some point we might want to bring some of that back, at which point it
might be useful to refer to what was deleted in this commit.
This patch deallocates command buffers after command submission completes (the same time as other resources are released).
It should be portable and robust on all back-ends, but not necessarily the most efficient. But reuse of command buffers, as well as more efficient allocation on Vulkan and DX12, are for followup work.
It worked ok on Vulkan but is causing problems on DX12 and Metal. Punt
for now and come back to this later when we do more sophisticated
resource management.
Add workgroup size to dispatch call (needed by metal). Change all fence
references to mutable for consistency.
Move backend traits to a separate file (move them out of the toplevel
namespace in preparation for the hub types going there, to make the
public API nicer).
Add a method and macro for automatically choosing shader code, and
change collatz example to generate all 3 kinds on build.
Change the interface for fences to accept mutable references. This will
actualy help the Metal backend more than dx12 (avoiding interior
mutability) but more accurately captures intent and matches gfx-hal.
Make the hub abstraction connect to the mux, rather than directly to the
Vulkan back-end.
As of this commit, both command line and winit examples work (on
Vulkan). In theory it should be possible to get them working on Dx12 as
well by translating the shader code, but there's a lot that can go
wrong.
This commit also contains a bunch of changes to mux to make conditional
compilation of match arms work, and new methods to support swapchain.
Adds a new "mux" module which can have multiple backends. As of this
commit, it's not wired up at all, but the functionality should be
reasonably complete.
Minor tweaks to the backend trait to accommodate this, mostly changing
Fence and Semaphore to references so they don't need to be Copy.
Part of the work toward #95
These function, but can use some work.
First, the buffer situation is worse than it should be. It should be
possible to create a single readback buffer rather then copy from
gpu-local to host-coherent.
Second, the command buffer `finish_timestamps` call doesn't correlate to
anything in Vulkan, so needs plumbing up through the hub in one form or
other when that happens. I'm inclined to make it ergonomic by doing a
bit of resource tracking that will trigger the appropriate call (and
subsequent host barrier) in the `finish` method on the command buffer.
Create compute pipelines from shader source and descriptor sets. This
gets it to the point where it can run the collatz example.
Still WIP and with rough edges, of course.
Chipping away at the dx12 backend. This should more or less do the
signalling to the CPU that the command buffer is done (ie wire up the
fence). It also creates buffer objects.
