mirror of
https://github.com/italicsjenga/vello.git
synced 2025-01-11 04:51:32 +11:00
2ecfc7a414
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.
105 lines
3 KiB
Rust
105 lines
3 KiB
Rust
// Copyright 2021 The piet-gpu authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// Also licensed under MIT license, at your choice.
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//! Macros, mostly to automate backend selection tedium.
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#[macro_export]
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macro_rules! mux_cfg {
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( #[cfg(vk)] $($tokens:tt)* ) => {
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#[cfg(not(target_os="macos"))] $( $tokens )*
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};
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( #[cfg(dx12)] $($tokens:tt)* ) => {
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#[cfg(target_os="windows")] $( $tokens )*
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};
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}
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#[macro_export]
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macro_rules! mux_enum {
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( $(#[$outer:meta])* $v:vis enum $name:ident {
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Vk($vk:ty),
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Dx12($dx12:ty),
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} ) => {
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$(#[$outer])* $v enum $name {
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#[cfg(not(target_os="macos"))]
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Vk($vk),
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#[cfg(target_os="windows")]
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Dx12($dx12),
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}
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impl $name {
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$crate::mux_cfg! {
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#[cfg(vk)]
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#[allow(unused)]
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fn vk(&self) -> &$vk {
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match self {
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$name::Vk(x) => x,
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_ => panic!("downcast error")
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}
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}
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}
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$crate::mux_cfg! {
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#[cfg(dx12)]
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#[allow(unused)]
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fn dx12(&self) -> &$dx12 {
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match self {
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$name::Dx12(x) => x,
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_ => panic!("downcast error")
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}
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}
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}
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}
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};
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}
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macro_rules! mux_device_enum {
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( $(#[$outer:meta])* $assoc_type: ident) => {
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$crate::mux_enum! {
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$(#[$outer])*
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pub enum $assoc_type {
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Vk(<$crate::vulkan::VkDevice as $crate::Device>::$assoc_type),
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Dx12(<$crate::dx12::Dx12Device as $crate::Device>::$assoc_type),
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}
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}
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}
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}
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#[macro_export]
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macro_rules! mux_match {
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( $e:expr ;
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$vkname:ident::Vk($vkvar:ident) => $vkblock: block
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$dx12name:ident::Dx12($dx12var:ident) => $dx12block: block
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) => {
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match $e {
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#[cfg(not(target_os="macos"))]
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$vkname::Vk($vkvar) => $vkblock
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#[cfg(target_os="windows")]
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$dx12name::Dx12($dx12var) => $dx12block
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}
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};
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( $e:expr ;
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$vkname:ident::Vk($vkvar:ident) => $vkblock: expr,
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$dx12name:ident::Dx12($dx12var:ident) => $dx12block: expr,
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) => {
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$crate::mux_match! { $e;
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$vkname::Vk($vkvar) => { $vkblock }
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$dx12name::Dx12($dx12var) => { $dx12block }
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}
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};
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}
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