use crate::framebuffer::OutputView; use crate::util; use librashader_reflect::back::wgsl::NagaWgslContext; use librashader_reflect::back::ShaderCompilerOutput; use librashader_reflect::reflect::ShaderReflection; use librashader_runtime::render_target::RenderTarget; use std::borrow::Cow; use std::sync::Arc; use wgpu::{ BindGroupLayout, BindGroupLayoutDescriptor, BindGroupLayoutEntry, BindingType, BufferBindingType, BufferSize, CommandEncoder, Operations, PipelineLayout, PushConstantRange, RenderPass, RenderPassColorAttachment, RenderPassDescriptor, SamplerBindingType, ShaderModule, ShaderSource, ShaderStages, TextureFormat, TextureSampleType, TextureViewDimension, VertexBufferLayout, }; pub struct WgpuGraphicsPipeline { pub layout: PipelineLayoutObjects, render_pipeline: wgpu::RenderPipeline, pub format: wgpu::TextureFormat, } pub struct PipelineLayoutObjects { layout: PipelineLayout, pub main_bind_group_layout: BindGroupLayout, pub sampler_bind_group_layout: BindGroupLayout, fragment_entry_name: String, vertex_entry_name: String, vertex: ShaderModule, fragment: ShaderModule, device: Arc, } impl PipelineLayoutObjects { pub fn new( reflection: &ShaderReflection, shader_assembly: &ShaderCompilerOutput, device: Arc, ) -> Self { let vertex = device.create_shader_module(wgpu::ShaderModuleDescriptor { label: Some("vertex"), source: ShaderSource::Wgsl(Cow::from(&shader_assembly.vertex)), }); let fragment = device.create_shader_module(wgpu::ShaderModuleDescriptor { label: Some("fragment"), source: ShaderSource::Wgsl(Cow::from(&shader_assembly.fragment)), }); let mut main_bindings = Vec::new(); let mut sampler_bindings = Vec::new(); let mut push_constant_range = Vec::new(); if let Some(push_meta) = reflection.push_constant.as_ref() && !push_meta.stage_mask.is_empty() { let push_mask = util::binding_stage_to_wgpu_stage(push_meta.stage_mask); if let Some(binding) = push_meta.binding { main_bindings.push(BindGroupLayoutEntry { binding, visibility: push_mask, ty: BindingType::Buffer { ty: BufferBindingType::Uniform, has_dynamic_offset: false, min_binding_size: BufferSize::new(push_meta.size as u64), }, count: None, }); } else { push_constant_range.push(PushConstantRange { stages: push_mask, range: 0..push_meta.size, }) } } if let Some(ubo_meta) = reflection.ubo.as_ref() && !ubo_meta.stage_mask.is_empty() { let ubo_mask = util::binding_stage_to_wgpu_stage(ubo_meta.stage_mask); main_bindings.push(BindGroupLayoutEntry { binding: ubo_meta.binding, visibility: ubo_mask, ty: BindingType::Buffer { ty: BufferBindingType::Uniform, has_dynamic_offset: false, min_binding_size: BufferSize::new(ubo_meta.size as u64), }, count: None, }); } for texture in reflection.meta.texture_meta.values() { main_bindings.push(BindGroupLayoutEntry { binding: texture.binding, visibility: ShaderStages::FRAGMENT, ty: BindingType::Texture { sample_type: TextureSampleType::Float { filterable: true }, view_dimension: TextureViewDimension::D2, multisampled: false, }, count: None, }); sampler_bindings.push(BindGroupLayoutEntry { binding: texture.binding, visibility: ShaderStages::FRAGMENT, ty: BindingType::Sampler(SamplerBindingType::Filtering), count: None, }) } let main_bind_group = device.create_bind_group_layout(&BindGroupLayoutDescriptor { label: Some("bind group 0"), entries: &main_bindings, }); let sampler_bind_group = device.create_bind_group_layout(&BindGroupLayoutDescriptor { label: Some("bind group 1"), entries: &sampler_bindings, }); let bind_group_layout_refs = [&main_bind_group, &sampler_bind_group]; let layout = device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor { label: Some("shader pipeline layout"), bind_group_layouts: &bind_group_layout_refs, push_constant_ranges: &push_constant_range.as_ref(), }); Self { layout, main_bind_group_layout: main_bind_group, sampler_bind_group_layout: sampler_bind_group, fragment_entry_name: shader_assembly.context.fragment.entry_points[0] .name .clone(), vertex_entry_name: shader_assembly.context.vertex.entry_points[0].name.clone(), vertex, fragment, device, } } pub fn create_pipeline(&self, framebuffer_format: TextureFormat) -> wgpu::RenderPipeline { self.device .create_render_pipeline(&wgpu::RenderPipelineDescriptor { label: Some("Render Pipeline"), layout: Some(&self.layout), vertex: wgpu::VertexState { module: &self.vertex, entry_point: &self.vertex_entry_name, buffers: &[VertexBufferLayout { array_stride: 4 * std::mem::size_of::() as wgpu::BufferAddress, step_mode: wgpu::VertexStepMode::Vertex, attributes: &[ wgpu::VertexAttribute { format: wgpu::VertexFormat::Float32x2, offset: 0, shader_location: 0, }, wgpu::VertexAttribute { format: wgpu::VertexFormat::Float32x2, offset: (2 * std::mem::size_of::()) as wgpu::BufferAddress, shader_location: 1, }, ], }], }, fragment: Some(wgpu::FragmentState { module: &self.fragment, entry_point: &self.fragment_entry_name, targets: &[Some(wgpu::ColorTargetState { format: framebuffer_format, blend: Some(wgpu::BlendState::REPLACE), write_mask: wgpu::ColorWrites::ALL, })], }), primitive: wgpu::PrimitiveState { topology: wgpu::PrimitiveTopology::TriangleStrip, strip_index_format: None, front_face: wgpu::FrontFace::Ccw, cull_mode: None, unclipped_depth: false, polygon_mode: wgpu::PolygonMode::Fill, conservative: false, }, depth_stencil: None, multisample: wgpu::MultisampleState { count: 1, mask: !0, alpha_to_coverage_enabled: false, }, multiview: None, }) } } impl WgpuGraphicsPipeline { pub fn new( device: Arc, shader_assembly: &ShaderCompilerOutput, reflection: &ShaderReflection, render_pass_format: TextureFormat, ) -> Self { let layout = PipelineLayoutObjects::new(reflection, shader_assembly, device); let render_pipeline = layout.create_pipeline(render_pass_format); Self { layout, render_pipeline, format: render_pass_format, } } pub fn recompile(&mut self, format: TextureFormat) { let render_pipeline = self.layout.create_pipeline(format); self.render_pipeline = render_pipeline; } pub(crate) fn begin_rendering<'pass>( &'pass self, output: &RenderTarget<'pass, OutputView>, cmd: &'pass mut CommandEncoder, ) -> RenderPass<'pass> { let mut render_pass = cmd.begin_render_pass(&RenderPassDescriptor { label: Some("librashader"), color_attachments: &[Some(RenderPassColorAttachment { view: &output.output.view, resolve_target: None, ops: Operations { load: wgpu::LoadOp::Clear(wgpu::Color { r: 0.0, g: 0.0, b: 0.0, a: 0.0, }), store: wgpu::StoreOp::Store, }, })], depth_stencil_attachment: None, timestamp_writes: None, occlusion_query_set: None, }); render_pass.set_scissor_rect( output.x as u32, output.y as u32, output.output.size.width, output.output.size.height, ); render_pass.set_viewport( output.x, output.y, output.output.size.width as f32, output.output.size.height as f32, 1.0, 1.0, ); render_pass.set_pipeline(&self.render_pipeline); render_pass } }