1 files changed, 413 insertions, 0 deletions
diff --git a/third_party/rust/wgpu-hal/src/empty.rs b/third_party/rust/wgpu-hal/src/empty.rs
new file mode 100644
index 0000000000..1497acad91
--- /dev/null
+++ b/third_party/rust/wgpu-hal/src/empty.rs
@@ -0,0 +1,413 @@
+#![allow(unused_variables)]
+
+use std::ops::Range;
+
+#[derive(Clone)]
+pub struct Api;
+pub struct Context;
+#[derive(Debug)]
+pub struct Encoder;
+#[derive(Debug)]
+pub struct Resource;
+
+type DeviceResult<T> = Result<T, crate::DeviceError>;
+
+impl crate::Api for Api {
+    type Instance = Context;
+    type Surface = Context;
+    type Adapter = Context;
+    type Device = Context;
+
+    type Queue = Context;
+    type CommandEncoder = Encoder;
+    type CommandBuffer = Resource;
+
+    type Buffer = Resource;
+    type Texture = Resource;
+    type SurfaceTexture = Resource;
+    type TextureView = Resource;
+    type Sampler = Resource;
+    type QuerySet = Resource;
+    type Fence = Resource;
+
+    type BindGroupLayout = Resource;
+    type BindGroup = Resource;
+    type PipelineLayout = Resource;
+    type ShaderModule = Resource;
+    type RenderPipeline = Resource;
+    type ComputePipeline = Resource;
+}
+
+impl crate::Instance<Api> for Context {
+    unsafe fn init(desc: &crate::InstanceDescriptor) -> Result<Self, crate::InstanceError> {
+        Ok(Context)
+    }
+    unsafe fn create_surface(
+        &self,
+        _display_handle: raw_window_handle::RawDisplayHandle,
+        _window_handle: raw_window_handle::RawWindowHandle,
+    ) -> Result<Context, crate::InstanceError> {
+        Ok(Context)
+    }
+    unsafe fn destroy_surface(&self, surface: Context) {}
+    unsafe fn enumerate_adapters(&self) -> Vec<crate::ExposedAdapter<Api>> {
+        Vec::new()
+    }
+}
+
+impl crate::Surface<Api> for Context {
+    unsafe fn configure(
+        &mut self,
+        device: &Context,
+        config: &crate::SurfaceConfiguration,
+    ) -> Result<(), crate::SurfaceError> {
+        Ok(())
+    }
+
+    unsafe fn unconfigure(&mut self, device: &Context) {}
+
+    unsafe fn acquire_texture(
+        &mut self,
+        timeout: Option<std::time::Duration>,
+    ) -> Result<Option<crate::AcquiredSurfaceTexture<Api>>, crate::SurfaceError> {
+        Ok(None)
+    }
+    unsafe fn discard_texture(&mut self, texture: Resource) {}
+}
+
+impl crate::Adapter<Api> for Context {
+    unsafe fn open(
+        &self,
+        features: wgt::Features,
+        _limits: &wgt::Limits,
+    ) -> DeviceResult<crate::OpenDevice<Api>> {
+        Err(crate::DeviceError::Lost)
+    }
+    unsafe fn texture_format_capabilities(
+        &self,
+        format: wgt::TextureFormat,
+    ) -> crate::TextureFormatCapabilities {
+        crate::TextureFormatCapabilities::empty()
+    }
+
+    unsafe fn surface_capabilities(&self, surface: &Context) -> Option<crate::SurfaceCapabilities> {
+        None
+    }
+
+    unsafe fn get_presentation_timestamp(&self) -> wgt::PresentationTimestamp {
+        wgt::PresentationTimestamp::INVALID_TIMESTAMP
+    }
+}
+
+impl crate::Queue<Api> for Context {
+    unsafe fn submit(
+        &mut self,
+        command_buffers: &[&Resource],
+        signal_fence: Option<(&mut Resource, crate::FenceValue)>,
+    ) -> DeviceResult<()> {
+        Ok(())
+    }
+    unsafe fn present(
+        &mut self,
+        surface: &mut Context,
+        texture: Resource,
+    ) -> Result<(), crate::SurfaceError> {
+        Ok(())
+    }
+
+    unsafe fn get_timestamp_period(&self) -> f32 {
+        1.0
+    }
+}
+
+impl crate::Device<Api> for Context {
+    unsafe fn exit(self, queue: Context) {}
+    unsafe fn create_buffer(&self, desc: &crate::BufferDescriptor) -> DeviceResult<Resource> {
+        Ok(Resource)
+    }
+    unsafe fn destroy_buffer(&self, buffer: Resource) {}
+    unsafe fn map_buffer(
+        &self,
+        buffer: &Resource,
+        range: crate::MemoryRange,
+    ) -> DeviceResult<crate::BufferMapping> {
+        Err(crate::DeviceError::Lost)
+    }
+    unsafe fn unmap_buffer(&self, buffer: &Resource) -> DeviceResult<()> {
+        Ok(())
+    }
+    unsafe fn flush_mapped_ranges<I>(&self, buffer: &Resource, ranges: I) {}
+    unsafe fn invalidate_mapped_ranges<I>(&self, buffer: &Resource, ranges: I) {}
+
+    unsafe fn create_texture(&self, desc: &crate::TextureDescriptor) -> DeviceResult<Resource> {
+        Ok(Resource)
+    }
+    unsafe fn destroy_texture(&self, texture: Resource) {}
+    unsafe fn create_texture_view(
+        &self,
+        texture: &Resource,
+        desc: &crate::TextureViewDescriptor,
+    ) -> DeviceResult<Resource> {
+        Ok(Resource)
+    }
+    unsafe fn destroy_texture_view(&self, view: Resource) {}
+    unsafe fn create_sampler(&self, desc: &crate::SamplerDescriptor) -> DeviceResult<Resource> {
+        Ok(Resource)
+    }
+    unsafe fn destroy_sampler(&self, sampler: Resource) {}
+
+    unsafe fn create_command_encoder(
+        &self,
+        desc: &crate::CommandEncoderDescriptor<Api>,
+    ) -> DeviceResult<Encoder> {
+        Ok(Encoder)
+    }
+    unsafe fn destroy_command_encoder(&self, encoder: Encoder) {}
+
+    unsafe fn create_bind_group_layout(
+        &self,
+        desc: &crate::BindGroupLayoutDescriptor,
+    ) -> DeviceResult<Resource> {
+        Ok(Resource)
+    }
+    unsafe fn destroy_bind_group_layout(&self, bg_layout: Resource) {}
+    unsafe fn create_pipeline_layout(
+        &self,
+        desc: &crate::PipelineLayoutDescriptor<Api>,
+    ) -> DeviceResult<Resource> {
+        Ok(Resource)
+    }
+    unsafe fn destroy_pipeline_layout(&self, pipeline_layout: Resource) {}
+    unsafe fn create_bind_group(
+        &self,
+        desc: &crate::BindGroupDescriptor<Api>,
+    ) -> DeviceResult<Resource> {
+        Ok(Resource)
+    }
+    unsafe fn destroy_bind_group(&self, group: Resource) {}
+
+    unsafe fn create_shader_module(
+        &self,
+        desc: &crate::ShaderModuleDescriptor,
+        shader: crate::ShaderInput,
+    ) -> Result<Resource, crate::ShaderError> {
+        Ok(Resource)
+    }
+    unsafe fn destroy_shader_module(&self, module: Resource) {}
+    unsafe fn create_render_pipeline(
+        &self,
+        desc: &crate::RenderPipelineDescriptor<Api>,
+    ) -> Result<Resource, crate::PipelineError> {
+        Ok(Resource)
+    }
+    unsafe fn destroy_render_pipeline(&self, pipeline: Resource) {}
+    unsafe fn create_compute_pipeline(
+        &self,
+        desc: &crate::ComputePipelineDescriptor<Api>,
+    ) -> Result<Resource, crate::PipelineError> {
+        Ok(Resource)
+    }
+    unsafe fn destroy_compute_pipeline(&self, pipeline: Resource) {}
+
+    unsafe fn create_query_set(
+        &self,
+        desc: &wgt::QuerySetDescriptor<crate::Label>,
+    ) -> DeviceResult<Resource> {
+        Ok(Resource)
+    }
+    unsafe fn destroy_query_set(&self, set: Resource) {}
+    unsafe fn create_fence(&self) -> DeviceResult<Resource> {
+        Ok(Resource)
+    }
+    unsafe fn destroy_fence(&self, fence: Resource) {}
+    unsafe fn get_fence_value(&self, fence: &Resource) -> DeviceResult<crate::FenceValue> {
+        Ok(0)
+    }
+    unsafe fn wait(
+        &self,
+        fence: &Resource,
+        value: crate::FenceValue,
+        timeout_ms: u32,
+    ) -> DeviceResult<bool> {
+        Ok(true)
+    }
+
+    unsafe fn start_capture(&self) -> bool {
+        false
+    }
+    unsafe fn stop_capture(&self) {}
+}
+
+impl crate::CommandEncoder<Api> for Encoder {
+    unsafe fn begin_encoding(&mut self, label: crate::Label) -> DeviceResult<()> {
+        Ok(())
+    }
+    unsafe fn discard_encoding(&mut self) {}
+    unsafe fn end_encoding(&mut self) -> DeviceResult<Resource> {
+        Ok(Resource)
+    }
+    unsafe fn reset_all<I>(&mut self, command_buffers: I) {}
+
+    unsafe fn transition_buffers<'a, T>(&mut self, barriers: T)
+    where
+        T: Iterator<Item = crate::BufferBarrier<'a, Api>>,
+    {
+    }
+
+    unsafe fn transition_textures<'a, T>(&mut self, barriers: T)
+    where
+        T: Iterator<Item = crate::TextureBarrier<'a, Api>>,
+    {
+    }
+
+    unsafe fn clear_buffer(&mut self, buffer: &Resource, range: crate::MemoryRange) {}
+
+    unsafe fn copy_buffer_to_buffer<T>(&mut self, src: &Resource, dst: &Resource, regions: T) {}
+
+    #[cfg(all(target_arch = "wasm32", not(target_os = "emscripten")))]
+    unsafe fn copy_external_image_to_texture<T>(
+        &mut self,
+        src: &wgt::ImageCopyExternalImage,
+        dst: &Resource,
+        dst_premultiplication: bool,
+        regions: T,
+    ) where
+        T: Iterator<Item = crate::TextureCopy>,
+    {
+    }
+
+    unsafe fn copy_texture_to_texture<T>(
+        &mut self,
+        src: &Resource,
+        src_usage: crate::TextureUses,
+        dst: &Resource,
+        regions: T,
+    ) {
+    }
+
+    unsafe fn copy_buffer_to_texture<T>(&mut self, src: &Resource, dst: &Resource, regions: T) {}
+
+    unsafe fn copy_texture_to_buffer<T>(
+        &mut self,
+        src: &Resource,
+        src_usage: crate::TextureUses,
+        dst: &Resource,
+        regions: T,
+    ) {
+    }
+
+    unsafe fn begin_query(&mut self, set: &Resource, index: u32) {}
+    unsafe fn end_query(&mut self, set: &Resource, index: u32) {}
+    unsafe fn write_timestamp(&mut self, set: &Resource, index: u32) {}
+    unsafe fn reset_queries(&mut self, set: &Resource, range: Range<u32>) {}
+    unsafe fn copy_query_results(
+        &mut self,
+        set: &Resource,
+        range: Range<u32>,
+        buffer: &Resource,
+        offset: wgt::BufferAddress,
+        stride: wgt::BufferSize,
+    ) {
+    }
+
+    // render
+
+    unsafe fn begin_render_pass(&mut self, desc: &crate::RenderPassDescriptor<Api>) {}
+    unsafe fn end_render_pass(&mut self) {}
+
+    unsafe fn set_bind_group(
+        &mut self,
+        layout: &Resource,
+        index: u32,
+        group: &Resource,
+        dynamic_offsets: &[wgt::DynamicOffset],
+    ) {
+    }
+    unsafe fn set_push_constants(
+        &mut self,
+        layout: &Resource,
+        stages: wgt::ShaderStages,
+        offset: u32,
+        data: &[u32],
+    ) {
+    }
+
+    unsafe fn insert_debug_marker(&mut self, label: &str) {}
+    unsafe fn begin_debug_marker(&mut self, group_label: &str) {}
+    unsafe fn end_debug_marker(&mut self) {}
+
+    unsafe fn set_render_pipeline(&mut self, pipeline: &Resource) {}
+
+    unsafe fn set_index_buffer<'a>(
+        &mut self,
+        binding: crate::BufferBinding<'a, Api>,
+        format: wgt::IndexFormat,
+    ) {
+    }
+    unsafe fn set_vertex_buffer<'a>(&mut self, index: u32, binding: crate::BufferBinding<'a, Api>) {
+    }
+    unsafe fn set_viewport(&mut self, rect: &crate::Rect<f32>, depth_range: Range<f32>) {}
+    unsafe fn set_scissor_rect(&mut self, rect: &crate::Rect<u32>) {}
+    unsafe fn set_stencil_reference(&mut self, value: u32) {}
+    unsafe fn set_blend_constants(&mut self, color: &[f32; 4]) {}
+
+    unsafe fn draw(
+        &mut self,
+        start_vertex: u32,
+        vertex_count: u32,
+        start_instance: u32,
+        instance_count: u32,
+    ) {
+    }
+    unsafe fn draw_indexed(
+        &mut self,
+        start_index: u32,
+        index_count: u32,
+        base_vertex: i32,
+        start_instance: u32,
+        instance_count: u32,
+    ) {
+    }
+    unsafe fn draw_indirect(
+        &mut self,
+        buffer: &Resource,
+        offset: wgt::BufferAddress,
+        draw_count: u32,
+    ) {
+    }
+    unsafe fn draw_indexed_indirect(
+        &mut self,
+        buffer: &Resource,
+        offset: wgt::BufferAddress,
+        draw_count: u32,
+    ) {
+    }
+    unsafe fn draw_indirect_count(
+        &mut self,
+        buffer: &Resource,
+        offset: wgt::BufferAddress,
+        count_buffer: &Resource,
+        count_offset: wgt::BufferAddress,
+        max_count: u32,
+    ) {
+    }
+    unsafe fn draw_indexed_indirect_count(
+        &mut self,
+        buffer: &Resource,
+        offset: wgt::BufferAddress,
+        count_buffer: &Resource,
+        count_offset: wgt::BufferAddress,
+        max_count: u32,
+    ) {
+    }
+
+    // compute
+
+    unsafe fn begin_compute_pass(&mut self, desc: &crate::ComputePassDescriptor) {}
+    unsafe fn end_compute_pass(&mut self) {}
+
+    unsafe fn set_compute_pipeline(&mut self, pipeline: &Resource) {}
+
+    unsafe fn dispatch(&mut self, count: [u32; 3]) {}
+    unsafe fn dispatch_indirect(&mut self, buffer: &Resource, offset: wgt::BufferAddress) {}
+}