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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use wgc::id;
pub use wgc::command::{compute_ffi::*, render_ffi::*};
pub mod client;
pub mod identity;
pub mod server;
pub use wgc::device::trace::Command as CommandEncoderAction;
use std::marker::PhantomData;
use std::{borrow::Cow, mem, slice};
use nsstring::nsACString;
type RawString = *const std::os::raw::c_char;
//TODO: figure out why 'a and 'b have to be different here
//TODO: remove this
fn cow_label<'a, 'b>(raw: &'a RawString) -> Option<Cow<'b, str>> {
if raw.is_null() {
None
} else {
let cstr = unsafe { std::ffi::CStr::from_ptr(*raw) };
cstr.to_str().ok().map(Cow::Borrowed)
}
}
// Hides the repeated boilerplate of turning a `Option<&nsACString>` into a `Option<Cow<str>`.
pub fn wgpu_string(gecko_string: Option<&nsACString>) -> Option<Cow<str>> {
gecko_string.map(|s| s.to_utf8())
}
/// An equivalent of `&[T]` for ffi structures and function parameters.
#[repr(C)]
pub struct FfiSlice<'a, T> {
// `data` may be null.
pub data: *const T,
pub length: usize,
pub _marker: PhantomData<&'a T>,
}
impl<'a, T> FfiSlice<'a, T> {
pub unsafe fn as_slice(&self) -> &'a [T] {
if self.data.is_null() {
// It is invalid to construct a rust slice with a null pointer.
return &[];
}
std::slice::from_raw_parts(self.data, self.length)
}
}
impl<'a, T> Copy for FfiSlice<'a, T> {}
impl<'a, T> Clone for FfiSlice<'a, T> {
fn clone(&self) -> Self {
*self
}
}
#[repr(C)]
pub struct ByteBuf {
data: *const u8,
len: usize,
capacity: usize,
}
impl ByteBuf {
fn from_vec(vec: Vec<u8>) -> Self {
if vec.is_empty() {
ByteBuf {
data: std::ptr::null(),
len: 0,
capacity: 0,
}
} else {
let bb = ByteBuf {
data: vec.as_ptr(),
len: vec.len(),
capacity: vec.capacity(),
};
mem::forget(vec);
bb
}
}
unsafe fn as_slice(&self) -> &[u8] {
slice::from_raw_parts(self.data, self.len)
}
}
#[repr(C)]
#[derive(serde::Serialize, serde::Deserialize)]
pub struct AdapterInformation<S> {
id: id::AdapterId,
limits: wgt::Limits,
features: wgt::Features,
name: S,
vendor: u32,
device: u32,
device_type: wgt::DeviceType,
driver: S,
driver_info: S,
backend: wgt::Backend,
}
#[derive(serde::Serialize, serde::Deserialize)]
struct ImplicitLayout<'a> {
pipeline: id::PipelineLayoutId,
bind_groups: Cow<'a, [id::BindGroupLayoutId]>,
}
#[derive(serde::Serialize, serde::Deserialize)]
enum DeviceAction<'a> {
CreateTexture(id::TextureId, wgc::resource::TextureDescriptor<'a>),
CreateSampler(id::SamplerId, wgc::resource::SamplerDescriptor<'a>),
CreateBindGroupLayout(
id::BindGroupLayoutId,
wgc::binding_model::BindGroupLayoutDescriptor<'a>,
),
CreatePipelineLayout(
id::PipelineLayoutId,
wgc::binding_model::PipelineLayoutDescriptor<'a>,
),
CreateBindGroup(id::BindGroupId, wgc::binding_model::BindGroupDescriptor<'a>),
CreateShaderModule(
id::ShaderModuleId,
wgc::pipeline::ShaderModuleDescriptor<'a>,
Cow<'a, str>,
),
CreateComputePipeline(
id::ComputePipelineId,
wgc::pipeline::ComputePipelineDescriptor<'a>,
Option<ImplicitLayout<'a>>,
),
CreateRenderPipeline(
id::RenderPipelineId,
wgc::pipeline::RenderPipelineDescriptor<'a>,
Option<ImplicitLayout<'a>>,
),
CreateRenderBundle(
id::RenderBundleId,
wgc::command::RenderBundleEncoder,
wgc::command::RenderBundleDescriptor<'a>,
),
CreateCommandEncoder(
id::CommandEncoderId,
wgt::CommandEncoderDescriptor<wgc::Label<'a>>,
),
Error(String),
}
#[derive(serde::Serialize, serde::Deserialize)]
enum QueueWriteAction {
Buffer {
dst: id::BufferId,
offset: wgt::BufferAddress,
},
Texture {
dst: wgt::ImageCopyTexture<id::TextureId>,
layout: wgt::ImageDataLayout,
size: wgt::Extent3d,
},
}
#[derive(serde::Serialize, serde::Deserialize)]
enum TextureAction<'a> {
CreateView(id::TextureViewId, wgc::resource::TextureViewDescriptor<'a>),
}
#[repr(C)]
#[derive(serde::Serialize, serde::Deserialize)]
enum DropAction {
Adapter(id::AdapterId),
Device(id::DeviceId),
ShaderModule(id::ShaderModuleId),
PipelineLayout(id::PipelineLayoutId),
BindGroupLayout(id::BindGroupLayoutId),
BindGroup(id::BindGroupId),
CommandBuffer(id::CommandBufferId),
RenderBundle(id::RenderBundleId),
RenderPipeline(id::RenderPipelineId),
ComputePipeline(id::ComputePipelineId),
Buffer(id::BufferId),
Texture(id::TextureId),
TextureView(id::TextureViewId),
Sampler(id::SamplerId),
}
impl DropAction {
// helper function to construct byte bufs
fn to_byte_buf(&self) -> ByteBuf {
let mut data = Vec::new();
bincode::serialize_into(&mut data, self).unwrap();
ByteBuf::from_vec(data)
}
}
#[repr(C)]
pub struct ImageDataLayout<'a> {
pub offset: wgt::BufferAddress,
pub bytes_per_row: Option<&'a u32>,
pub rows_per_image: Option<&'a u32>,
}
impl<'a> ImageDataLayout<'a> {
fn into_wgt(&self) -> wgt::ImageDataLayout {
wgt::ImageDataLayout {
offset: self.offset,
bytes_per_row: self.bytes_per_row.map(|bpr| *bpr),
rows_per_image: self.rows_per_image.map(|rpi| *rpi),
}
}
}
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