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
Pipeline the CPU and GPU work so that two frames can be in flight at
once.
This dramatically improves the performance especially on Android. Note
that I've also changed the default configuration to be 3 frames in
flight and FIFO mode.
Make the scene dependent on timing.
This commit patches the HAL to reuse command buffers; this works well on
Vulkan and prevents a leak, but breaks the other back-ends. That will
require a solution, possibly including plumbing up the resource lifetime
responsibilities to the client.
Other things might be hacky as well.
Separate out render context upload from renderer creation. Upload ramps
to GPU buffer. Encode gradients to scene description. Fix a number of
bugs in uploading and processing.
This renders gradients in a test image, but has some shortcomings. For
one, staging buffers need to be applied for a couple things (they're
just host mapped for now). Also, the interaction between sRGB and
premultiplied alpha isn't quite right. The size of the gradient ramp
buffer is fixed and should be dynamic.
And of course there's always more optimization to be done, including
making the upload of gradient ramps more incremental, and probably
hashing of the stops instead of the processed ramps.
Move types into the toplevel and hide implementation details. Remove
deref of hub CmdBuf to mux. Restrict public visibility of internals.
Most items have some docs, though improvements are still possible. In
particular, there should be detailed safety info.
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.
Add a method to create a buffer with initial content, which requires
staging buffers under the hood.
This patch also changes the lower-level (Vulkan) interface to be closer
to the raw Vulkan call.
As described in #62, the non-deterministic scene monoid may result in
slightly different transformations for path segments in an otherwise
closed path.
This change ensures consistent transformation across paths in three steps.
First, absolute transformations computed by the scene monoid is stored
along with path segments and annotated elements.
Second, elements.comp no longer transforms path segments. Instead, each
segment is stored untransformed along with a reference to its absolute
transformation.
Finally, path_coarse performs the transformation of path segments.
Because all segments in a path share a single transformation reference,
the inconsistency in #62 is avoided.
Fixes#62
Signed-off-by: Elias Naur <mail@eliasnaur.com>
I realized there's a problem with encoding clip bboxes relative to the
current transform (see #36 for a more detailed explanation), so this is
changing it to absolute bboxes.
This more or less gets clips working. There are optimization
opportunities (all-clear and all-opaque mask tiles), and it doesn't deal
with overflow of the blend stack, but it seems to basically work.
The hub does a little better lifetime tracking of resources (so
Rust-side references can be dropped), and in the future will be used for
dynamic selection of backend.
The migration is still a bit half-baked, as there are a bunch of
Vulkan-specific types in the signatures, but it shouldn't be too much
work to sort that out. Perhaps it can wait until there is a second
backend though.
The main motivation for this is to create image objects with lifetime
tracking, one of the things required for #38.
Update to latest versions of all dependencies. Among other things, this
gets us on piet 0.2, though almost all of the changes were around text,
which is not yet implemented.
Path segments are unsorted, but other elements are using the same
sort-middle approach as before.
This is a checkpoint. At this point, there are unoptimized versions
of tile init and coarse path raster, but it isn't wired up into a
working pipeline. Also observing about a 3x performance regression in
element processing, which needs to be investigated.
