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Support multi viewport rendering with reusable text atlas (#88)

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Pēteris Pakalns 2024-03-26 02:25:57 +02:00 • committed by GitHub
parent 4700e54f16
commit f95e66f612
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3 changed files with 78 additions and 83 deletions
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92
src/text_atlas.rs
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@ -1,20 +1,20 @@
use crate::{
text_render::ContentType, CacheKey, FontSystem, GlyphDetails, GlyphToRender, GpuCacheStatus,
Params, Resolution, SwashCache,
Params, SwashCache,
};
use etagere::{size2, Allocation, BucketedAtlasAllocator};
use lru::LruCache;
use std::{borrow::Cow, collections::HashSet, mem::size_of, num::NonZeroU64, sync::Arc};
use wgpu::{
BindGroup, BindGroupDescriptor, BindGroupEntry, BindGroupLayout, BindGroupLayoutEntry,
BindingResource, BindingType, BlendState, Buffer, BufferBindingType, BufferDescriptor,
BufferUsages, ColorTargetState, ColorWrites, DepthStencilState, Device, Extent3d, FilterMode,
FragmentState, ImageCopyTexture, ImageDataLayout, MultisampleState, Origin3d, PipelineLayout,
PipelineLayoutDescriptor, PrimitiveState, Queue, RenderPipeline, RenderPipelineDescriptor,
Sampler, SamplerBindingType, SamplerDescriptor, ShaderModule, ShaderModuleDescriptor,
ShaderSource, ShaderStages, Texture, TextureAspect, TextureDescriptor, TextureDimension,
TextureFormat, TextureSampleType, TextureUsages, TextureView, TextureViewDescriptor,
TextureViewDimension, VertexFormat, VertexState,
BindingResource, BindingType, BlendState, BufferBindingType, ColorTargetState, ColorWrites,
DepthStencilState, Device, Extent3d, FilterMode, FragmentState, ImageCopyTexture,
ImageDataLayout, MultisampleState, Origin3d, PipelineLayout, PipelineLayoutDescriptor,
PrimitiveState, Queue, RenderPipeline, RenderPipelineDescriptor, Sampler, SamplerBindingType,
SamplerDescriptor, ShaderModule, ShaderModuleDescriptor, ShaderSource, ShaderStages, Texture,
TextureAspect, TextureDescriptor, TextureDimension, TextureFormat, TextureSampleType,
TextureUsages, TextureView, TextureViewDescriptor, TextureViewDimension, VertexFormat,
VertexState,
};
#[allow(dead_code)]
@ -255,8 +255,6 @@ pub enum ColorMode {
/// An atlas containing a cache of rasterized glyphs that can be rendered.
pub struct TextAtlas {
pub(crate) params: Params,
pub(crate) params_buffer: Buffer,
pub(crate) cached_pipelines: Vec<(
MultisampleState,
Option<DepthStencilState>,
@ -264,6 +262,7 @@ pub struct TextAtlas {
)>,
pub(crate) bind_group: Arc<BindGroup>,
pub(crate) bind_group_layout: BindGroupLayout,
pub(crate) text_render_bind_group_layout: BindGroupLayout,
pub(crate) sampler: Sampler,
pub(crate) color_atlas: InnerAtlas,
pub(crate) mask_atlas: InnerAtlas,
@ -340,9 +339,9 @@ impl TextAtlas {
],
}];
let bind_group_layout = device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
entries: &[
BindGroupLayoutEntry {
let text_render_bind_group_layout =
device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
entries: &[BindGroupLayoutEntry {
binding: 0,
visibility: ShaderStages::VERTEX,
ty: BindingType::Buffer {
@ -351,6 +350,21 @@ impl TextAtlas {
min_binding_size: NonZeroU64::new(size_of::<Params>() as u64),
},
count: None,
}],
label: Some("glyphon text render bind group layout"),
});
let bind_group_layout = device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
entries: &[
BindGroupLayoutEntry {
binding: 0,
visibility: ShaderStages::VERTEX | ShaderStages::FRAGMENT,
ty: BindingType::Texture {
multisampled: false,
view_dimension: TextureViewDimension::D2,
sample_type: TextureSampleType::Float { filterable: true },
},
count: None,
},
BindGroupLayoutEntry {
binding: 1,
@ -364,37 +378,12 @@ impl TextAtlas {
},
BindGroupLayoutEntry {
binding: 2,
visibility: ShaderStages::VERTEX | ShaderStages::FRAGMENT,
ty: BindingType::Texture {
multisampled: false,
view_dimension: TextureViewDimension::D2,
sample_type: TextureSampleType::Float { filterable: true },
},
count: None,
},
BindGroupLayoutEntry {
binding: 3,
visibility: ShaderStages::FRAGMENT,
ty: BindingType::Sampler(SamplerBindingType::Filtering),
count: None,
},
],
label: Some("glyphon bind group layout"),
});
let params = Params {
screen_resolution: Resolution {
width: 0,
height: 0,
},
_pad: [0, 0],
};
let params_buffer = device.create_buffer(&BufferDescriptor {
label: Some("glyphon params"),
size: size_of::<Params>() as u64,
usage: BufferUsages::UNIFORM | BufferUsages::COPY_DST,
mapped_at_creation: false,
label: Some("glyphon text atlas bind group layout"),
});
let color_atlas = InnerAtlas::new(
@ -414,34 +403,29 @@ impl TextAtlas {
entries: &[
BindGroupEntry {
binding: 0,
resource: params_buffer.as_entire_binding(),
},
BindGroupEntry {
binding: 1,
resource: BindingResource::TextureView(&color_atlas.texture_view),
},
BindGroupEntry {
binding: 2,
binding: 1,
resource: BindingResource::TextureView(&mask_atlas.texture_view),
},
BindGroupEntry {
binding: 3,
binding: 2,
resource: BindingResource::Sampler(&sampler),
},
],
label: Some("glyphon bind group"),
label: Some("glyphon text atlas bind group"),
}));
let pipeline_layout = device.create_pipeline_layout(&PipelineLayoutDescriptor {
label: None,
bind_group_layouts: &[&bind_group_layout],
bind_group_layouts: &[&text_render_bind_group_layout, &bind_group_layout],
push_constant_ranges: &[],
});
Self {
params,
params_buffer,
cached_pipelines: Vec::new(),
text_render_bind_group_layout,
bind_group,
bind_group_layout,
sampler,
@ -540,18 +524,14 @@ impl TextAtlas {
entries: &[
BindGroupEntry {
binding: 0,
resource: self.params_buffer.as_entire_binding(),
},
BindGroupEntry {
binding: 1,
resource: BindingResource::TextureView(&self.color_atlas.texture_view),
},
BindGroupEntry {
binding: 2,
binding: 1,
resource: BindingResource::TextureView(&self.mask_atlas.texture_view),
},
BindGroupEntry {
binding: 3,
binding: 2,
resource: BindingResource::Sampler(&self.sampler),
},
],