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Share msaa::Blit texture between multiple windows

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This commit is contained in:
Héctor Ramón Jiménez 2024-04-07 18:45:30 +02:00
parent 13289dbd19
commit 288f62bfb6
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GPG key ID: 7CC46565708259A7
4 changed files with 112 additions and 69 deletions
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134
wgpu/src/triangle/msaa.rs
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@ -1,13 +1,18 @@
use crate::core::{Size, Transformation};
use crate::graphics;
use std::num::NonZeroU64;
#[derive(Debug)]
pub struct Blit {
format: wgpu::TextureFormat,
pipeline: wgpu::RenderPipeline,
constants: wgpu::BindGroup,
ratio: wgpu::Buffer,
texture_layout: wgpu::BindGroupLayout,
sample_count: u32,
targets: Option<Targets>,
last_region: Option<Size<u32>>,
}
impl Blit {
@ -19,27 +24,52 @@ impl Blit {
let sampler =
device.create_sampler(&wgpu::SamplerDescriptor::default());
let ratio = device.create_buffer(&wgpu::BufferDescriptor {
label: Some("iced-wgpu::triangle::msaa ratio"),
size: std::mem::size_of::<Ratio>() as u64,
usage: wgpu::BufferUsages::COPY_DST | wgpu::BufferUsages::UNIFORM,
mapped_at_creation: false,
});
let constant_layout =
device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
label: Some("iced_wgpu::triangle:msaa uniforms layout"),
entries: &[wgpu::BindGroupLayoutEntry {
binding: 0,
visibility: wgpu::ShaderStages::FRAGMENT,
ty: wgpu::BindingType::Sampler(
wgpu::SamplerBindingType::NonFiltering,
),
count: None,
}],
entries: &[
wgpu::BindGroupLayoutEntry {
binding: 0,
visibility: wgpu::ShaderStages::FRAGMENT,
ty: wgpu::BindingType::Sampler(
wgpu::SamplerBindingType::NonFiltering,
),
count: None,
},
wgpu::BindGroupLayoutEntry {
binding: 1,
visibility: wgpu::ShaderStages::VERTEX,
ty: wgpu::BindingType::Buffer {
ty: wgpu::BufferBindingType::Uniform,
has_dynamic_offset: false,
min_binding_size: None,
},
count: None,
},
],
});
let constant_bind_group =
device.create_bind_group(&wgpu::BindGroupDescriptor {
label: Some("iced_wgpu::triangle::msaa uniforms bind group"),
layout: &constant_layout,
entries: &[wgpu::BindGroupEntry {
binding: 0,
resource: wgpu::BindingResource::Sampler(&sampler),
}],
entries: &[
wgpu::BindGroupEntry {
binding: 0,
resource: wgpu::BindingResource::Sampler(&sampler),
},
wgpu::BindGroupEntry {
binding: 1,
resource: ratio.as_entire_binding(),
},
],
});
let texture_layout =
@ -88,9 +118,7 @@ impl Blit {
entry_point: "fs_main",
targets: &[Some(wgpu::ColorTargetState {
format,
blend: Some(
wgpu::BlendState::PREMULTIPLIED_ALPHA_BLENDING,
),
blend: Some(wgpu::BlendState::ALPHA_BLENDING),
write_mask: wgpu::ColorWrites::ALL,
})],
}),
@ -112,43 +140,61 @@ impl Blit {
format,
pipeline,
constants: constant_bind_group,
ratio,
texture_layout,
sample_count: antialiasing.sample_count(),
targets: None,
last_region: None,
}
}
pub fn targets(
pub fn prepare(
&mut self,
device: &wgpu::Device,
width: u32,
height: u32,
) -> (&wgpu::TextureView, &wgpu::TextureView) {
encoder: &mut wgpu::CommandEncoder,
belt: &mut wgpu::util::StagingBelt,
region_size: Size<u32>,
) -> Transformation {
match &mut self.targets {
None => {
Some(targets)
if region_size.width <= targets.size.width
&& region_size.height <= targets.size.height => {}
_ => {
self.targets = Some(Targets::new(
device,
self.format,
&self.texture_layout,
self.sample_count,
width,
height,
region_size,
));
}
Some(targets) => {
if targets.width != width || targets.height != height {
self.targets = Some(Targets::new(
device,
self.format,
&self.texture_layout,
self.sample_count,
width,
height,
));
}
}
}
let targets = self.targets.as_mut().unwrap();
if Some(region_size) != self.last_region {
let ratio = Ratio {
u: region_size.width as f32 / targets.size.width as f32,
v: region_size.height as f32 / targets.size.height as f32,
};
belt.write_buffer(
encoder,
&self.ratio,
0,
NonZeroU64::new(std::mem::size_of::<Ratio>() as u64)
.expect("non-empty ratio"),
device,
)
.copy_from_slice(bytemuck::bytes_of(&ratio));
self.last_region = Some(region_size);
}
Transformation::orthographic(targets.size.width, targets.size.height)
}
pub fn targets(&self) -> (&wgpu::TextureView, &wgpu::TextureView) {
let targets = self.targets.as_ref().unwrap();
(&targets.attachment, &targets.resolve)
@ -191,8 +237,7 @@ struct Targets {
attachment: wgpu::TextureView,
resolve: wgpu::TextureView,
bind_group: wgpu::BindGroup,
width: u32,
height: u32,
size: Size<u32>,
}
impl Targets {
@ -201,12 +246,11 @@ impl Targets {
format: wgpu::TextureFormat,
texture_layout: &wgpu::BindGroupLayout,
sample_count: u32,
width: u32,
height: u32,
size: Size<u32>,
) -> Targets {
let extent = wgpu::Extent3d {
width,
height,
width: size.width,
height: size.height,
depth_or_array_layers: 1,
};
@ -252,8 +296,14 @@ impl Targets {
attachment,
resolve,
bind_group,
width,
height,
size,
}
}
}
#[derive(Debug, Clone, Copy, bytemuck::Pod, bytemuck::Zeroable)]
#[repr(C)]
struct Ratio {
u: f32,
v: f32,
}