Based on the work in #6717, plus additional adaptions mentioned in
https://github.com/gfx-rs/wgpu/blob/master/CHANGELOG.md#wgpu-013-2022-06-30,
and more not-mentioned but required changes.
Also bump `wasm-bindgen` to `0.2.81` (along with its helper crates), as
required by the new `wgpu` version.
Note that I don't fully understand some of the required changes, notably:
* `wgpu::PresentMode::Mailbox` no longer works on my machine (Windows 11) -
The `wgpu` documentation says that `wgpu::PresentMode::Fifo` is the
only guaranteed to be supported, so I switched over to it instead.
* `self.staging_belt.recall()` doesn't return a `Future` anymore -
I assume it became synchronous so I simply removed the `executor`
from there.
Always use a non-sRGB texture as the render target so that color
and alpha blending are in sRGB space, matching Flash behavior.
If the surface format requires sRGB, render to an intermediate
linear buffer and copy to the surface as a final render step.
A regression in naga caused a mistranslation of the gradient shader
on the vulkan backend. This caused radial gradients to be rendered
as linear gradients on the vulkan backend. dx12 seems unaffected.
This seems to be cased by a switch statement starting with a default
case Re-order the case statements to avoid this. Looks like it's been
fixed in naga master.
naga is currently lenient about some things which are invalid by
the WGSL spec. The Tint WGSL compiler disagreed, so these shaders
failed to compile in Chrome.
Switch to a single render pass for the whole frame, as opposed to
a render pass per draw call. This should be a large improvement to
performance. This currently requires some unsafe to work around a
self-reference between RenderPass and CommandEncoder in Frame;
this could eventually be cleaned up by changing RenderBackend
to return a Frame object instead of using begin_frame/end_frame
pairs.
Also switch to using push constants for the transform/color
uniforms.
Nathan Adams