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use bevy::{
core_pipeline::fullscreen_vertex_shader::fullscreen_shader_vertex_state,
prelude::*,
render::{
render_resource::{
binding_types::{sampler, texture_2d},
BindGroupLayout, BindGroupLayoutEntries, CachedRenderPipelineId, ColorTargetState,
ColorWrites, FragmentState, MultisampleState, PipelineCache, PrimitiveState,
RenderPipelineDescriptor, Sampler, SamplerBindingType, SamplerDescriptor, ShaderStages,
TextureFormat, TextureSampleType,
},
renderer::RenderDevice,
texture::BevyDefault,
},
};
#[derive(Resource)]
pub struct DitherPostProcessPipeline {
pub layout: BindGroupLayout,
pub screen_sampler: Sampler,
pub threshold_map_sampler: Sampler,
pub pipeline_id: CachedRenderPipelineId,
}
impl FromWorld for DitherPostProcessPipeline {
fn from_world(world: &mut World) -> Self {
let render_device = world.resource::<RenderDevice>();
let layout = render_device.create_bind_group_layout(
"dither_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),
),
),
);
let screen_sampler = render_device.create_sampler(&SamplerDescriptor::default());
let threshold_map_sampler = render_device.create_sampler(&SamplerDescriptor::default());
let shader = world.resource::<AssetServer>().load::<Shader>(
"embedded://grex_dither_post_process/../assets/shaders/dither_post_process.wgsl",
);
let pipeline_id =
world
.resource_mut::<PipelineCache>()
.queue_render_pipeline(RenderPipelineDescriptor {
label: Some("dither_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,
threshold_map_sampler,
pipeline_id,
}
}
}
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