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use bevy::{prelude::*, render::{render_resource::{Sampler, BindGroupLayout, BindGroupLayoutEntries, ShaderStages, binding_types::{texture_2d, sampler, uniform_buffer}, TextureSampleType, SamplerBindingType, SamplerDescriptor, PipelineCache, RenderPipelineDescriptor, CachedRenderPipelineId, PrimitiveState, MultisampleState, FragmentState, ColorTargetState, TextureFormat, ColorWrites}, renderer::RenderDevice, texture::BevyDefault}, core_pipeline::fullscreen_vertex_shader::fullscreen_shader_vertex_state};
use super::components;
#[derive(Resource)]
pub struct OutlinePostProcessPipeline {
pub layout: BindGroupLayout,
pub screen_sampler: Sampler,
pub normal_sampler: Sampler,
pub pipeline_id: CachedRenderPipelineId,
}
impl FromWorld for OutlinePostProcessPipeline {
fn from_world(world: &mut World) -> Self {
let render_device = world.resource::<RenderDevice>();
let layout = render_device.create_bind_group_layout(
"outline_post_process_bind_group_layout",
&BindGroupLayoutEntries::sequential(
ShaderStages::FRAGMENT,
(
texture_2d(TextureSampleType::Float{ filterable: true }),
sampler(SamplerBindingType::Filtering),
texture_2d(TextureSampleType::Float{ filterable: true }),
sampler(SamplerBindingType::Filtering),
uniform_buffer::<components::OutlinePostProcessSettings>(false),
),
),
);
let screen_sampler = render_device.create_sampler(&SamplerDescriptor::default());
let normal_sampler = render_device.create_sampler(&SamplerDescriptor::default());
let shader = world.resource::<AssetServer>().load::<Shader>("embedded://grex_outline_post_process/../assets/shaders/outline_post_process.wgsl");
let pipeline_id = world.resource_mut::<PipelineCache>().queue_render_pipeline(RenderPipelineDescriptor {
label: Some("outline_post_process_render_pipeline".into()),
layout: vec![layout.clone()],
push_constant_ranges: vec![],
vertex: fullscreen_shader_vertex_state(),
primitive: PrimitiveState::default(),
depth_stencil: None,
multisample: MultisampleState::default(),
fragment: Some(FragmentState {
shader,
shader_defs: vec![],
entry_point: "fragment".into(),
targets: vec![Some(ColorTargetState {
format: TextureFormat::bevy_default(),
blend: None,
write_mask: ColorWrites::ALL,
})],
}),
});
Self {
layout,
screen_sampler,
normal_sampler,
pipeline_id,
}
}
}
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