564 lines
18 KiB
Rust
564 lines
18 KiB
Rust
mod atlas;
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#[cfg(feature = "image")]
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mod raster;
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#[cfg(feature = "svg")]
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mod vector;
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use crate::Transformation;
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use atlas::Atlas;
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use iced_graphics::layer;
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use iced_native::Rectangle;
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use std::cell::RefCell;
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use std::mem;
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use zerocopy::AsBytes;
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#[cfg(feature = "image")]
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use iced_native::image;
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#[cfg(feature = "svg")]
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use iced_native::svg;
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#[derive(Debug)]
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pub struct Pipeline {
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#[cfg(feature = "image")]
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raster_cache: RefCell<raster::Cache>,
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#[cfg(feature = "svg")]
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vector_cache: RefCell<vector::Cache>,
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pipeline: wgpu::RenderPipeline,
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uniforms: wgpu::Buffer,
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vertices: wgpu::Buffer,
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indices: wgpu::Buffer,
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instances: wgpu::Buffer,
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constants: wgpu::BindGroup,
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texture: wgpu::BindGroup,
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texture_version: usize,
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texture_layout: wgpu::BindGroupLayout,
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texture_atlas: Atlas,
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}
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impl Pipeline {
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pub fn new(device: &wgpu::Device, format: wgpu::TextureFormat) -> Self {
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let sampler = device.create_sampler(&wgpu::SamplerDescriptor {
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address_mode_u: wgpu::AddressMode::ClampToEdge,
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address_mode_v: wgpu::AddressMode::ClampToEdge,
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address_mode_w: wgpu::AddressMode::ClampToEdge,
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mag_filter: wgpu::FilterMode::Linear,
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min_filter: wgpu::FilterMode::Linear,
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mipmap_filter: wgpu::FilterMode::Linear,
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lod_min_clamp: -100.0,
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lod_max_clamp: 100.0,
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compare: wgpu::CompareFunction::Always,
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});
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let constant_layout =
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device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
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label: None,
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bindings: &[
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wgpu::BindGroupLayoutEntry {
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binding: 0,
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visibility: wgpu::ShaderStage::VERTEX,
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ty: wgpu::BindingType::UniformBuffer { dynamic: false },
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},
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wgpu::BindGroupLayoutEntry {
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binding: 1,
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visibility: wgpu::ShaderStage::FRAGMENT,
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ty: wgpu::BindingType::Sampler { comparison: false },
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},
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],
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});
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let uniforms = Uniforms {
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transform: Transformation::identity().into(),
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};
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let uniforms_buffer = device.create_buffer_with_data(
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uniforms.as_bytes(),
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wgpu::BufferUsage::UNIFORM | wgpu::BufferUsage::COPY_DST,
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);
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let constant_bind_group =
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device.create_bind_group(&wgpu::BindGroupDescriptor {
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label: None,
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layout: &constant_layout,
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bindings: &[
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wgpu::Binding {
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binding: 0,
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resource: wgpu::BindingResource::Buffer {
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buffer: &uniforms_buffer,
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range: 0..std::mem::size_of::<Uniforms>() as u64,
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},
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},
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wgpu::Binding {
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binding: 1,
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resource: wgpu::BindingResource::Sampler(&sampler),
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},
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],
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});
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let texture_layout =
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device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
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label: None,
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bindings: &[wgpu::BindGroupLayoutEntry {
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binding: 0,
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visibility: wgpu::ShaderStage::FRAGMENT,
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ty: wgpu::BindingType::SampledTexture {
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dimension: wgpu::TextureViewDimension::D2,
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component_type: wgpu::TextureComponentType::Float,
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multisampled: false,
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},
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}],
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});
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let layout =
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device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
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bind_group_layouts: &[&constant_layout, &texture_layout],
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});
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let vs = include_bytes!("shader/image.vert.spv");
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let vs_module = device.create_shader_module(
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&wgpu::read_spirv(std::io::Cursor::new(&vs[..]))
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.expect("Read image vertex shader as SPIR-V"),
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);
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let fs = include_bytes!("shader/image.frag.spv");
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let fs_module = device.create_shader_module(
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&wgpu::read_spirv(std::io::Cursor::new(&fs[..]))
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.expect("Read image fragment shader as SPIR-V"),
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);
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let pipeline =
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device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
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layout: &layout,
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vertex_stage: wgpu::ProgrammableStageDescriptor {
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module: &vs_module,
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entry_point: "main",
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},
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fragment_stage: Some(wgpu::ProgrammableStageDescriptor {
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module: &fs_module,
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entry_point: "main",
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}),
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rasterization_state: Some(wgpu::RasterizationStateDescriptor {
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front_face: wgpu::FrontFace::Cw,
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cull_mode: wgpu::CullMode::None,
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depth_bias: 0,
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depth_bias_slope_scale: 0.0,
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depth_bias_clamp: 0.0,
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}),
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primitive_topology: wgpu::PrimitiveTopology::TriangleList,
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color_states: &[wgpu::ColorStateDescriptor {
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format,
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color_blend: wgpu::BlendDescriptor {
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src_factor: wgpu::BlendFactor::SrcAlpha,
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dst_factor: wgpu::BlendFactor::OneMinusSrcAlpha,
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operation: wgpu::BlendOperation::Add,
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},
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alpha_blend: wgpu::BlendDescriptor {
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src_factor: wgpu::BlendFactor::One,
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dst_factor: wgpu::BlendFactor::OneMinusSrcAlpha,
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operation: wgpu::BlendOperation::Add,
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},
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write_mask: wgpu::ColorWrite::ALL,
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}],
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depth_stencil_state: None,
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vertex_state: wgpu::VertexStateDescriptor {
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index_format: wgpu::IndexFormat::Uint16,
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vertex_buffers: &[
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wgpu::VertexBufferDescriptor {
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stride: mem::size_of::<Vertex>() as u64,
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step_mode: wgpu::InputStepMode::Vertex,
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attributes: &[wgpu::VertexAttributeDescriptor {
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shader_location: 0,
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format: wgpu::VertexFormat::Float2,
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offset: 0,
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}],
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},
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wgpu::VertexBufferDescriptor {
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stride: mem::size_of::<Instance>() as u64,
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step_mode: wgpu::InputStepMode::Instance,
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attributes: &[
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wgpu::VertexAttributeDescriptor {
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shader_location: 1,
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format: wgpu::VertexFormat::Float2,
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offset: 0,
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},
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wgpu::VertexAttributeDescriptor {
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shader_location: 2,
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format: wgpu::VertexFormat::Float2,
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offset: 4 * 2,
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},
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wgpu::VertexAttributeDescriptor {
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shader_location: 3,
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format: wgpu::VertexFormat::Float2,
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offset: 4 * 4,
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},
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wgpu::VertexAttributeDescriptor {
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shader_location: 4,
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format: wgpu::VertexFormat::Float2,
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offset: 4 * 6,
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},
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wgpu::VertexAttributeDescriptor {
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shader_location: 5,
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format: wgpu::VertexFormat::Uint,
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offset: 4 * 8,
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},
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],
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},
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],
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},
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sample_count: 1,
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sample_mask: !0,
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alpha_to_coverage_enabled: false,
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});
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let vertices = device.create_buffer_with_data(
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QUAD_VERTS.as_bytes(),
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wgpu::BufferUsage::VERTEX,
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);
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let indices = device.create_buffer_with_data(
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QUAD_INDICES.as_bytes(),
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wgpu::BufferUsage::INDEX,
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);
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let instances = device.create_buffer(&wgpu::BufferDescriptor {
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label: None,
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size: mem::size_of::<Instance>() as u64 * Instance::MAX as u64,
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usage: wgpu::BufferUsage::VERTEX | wgpu::BufferUsage::COPY_DST,
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});
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let texture_atlas = Atlas::new(device);
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let texture = device.create_bind_group(&wgpu::BindGroupDescriptor {
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label: None,
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layout: &texture_layout,
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bindings: &[wgpu::Binding {
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binding: 0,
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resource: wgpu::BindingResource::TextureView(
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&texture_atlas.view(),
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),
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}],
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});
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Pipeline {
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#[cfg(feature = "image")]
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raster_cache: RefCell::new(raster::Cache::new()),
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#[cfg(feature = "svg")]
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vector_cache: RefCell::new(vector::Cache::new()),
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pipeline,
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uniforms: uniforms_buffer,
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vertices,
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indices,
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instances,
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constants: constant_bind_group,
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texture,
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texture_version: texture_atlas.layer_count(),
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texture_layout,
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texture_atlas,
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}
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}
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#[cfg(feature = "image")]
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pub fn dimensions(&self, handle: &image::Handle) -> (u32, u32) {
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let mut cache = self.raster_cache.borrow_mut();
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let memory = cache.load(&handle);
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memory.dimensions()
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}
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#[cfg(feature = "svg")]
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pub fn viewport_dimensions(&self, handle: &svg::Handle) -> (u32, u32) {
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let mut cache = self.vector_cache.borrow_mut();
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let svg = cache.load(&handle);
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svg.viewport_dimensions()
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}
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pub fn draw(
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&mut self,
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device: &wgpu::Device,
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encoder: &mut wgpu::CommandEncoder,
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images: &[layer::Image],
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transformation: Transformation,
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bounds: Rectangle<u32>,
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target: &wgpu::TextureView,
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_scale: f32,
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) {
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let instances: &mut Vec<Instance> = &mut Vec::new();
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#[cfg(feature = "image")]
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let mut raster_cache = self.raster_cache.borrow_mut();
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#[cfg(feature = "svg")]
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let mut vector_cache = self.vector_cache.borrow_mut();
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for image in images {
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match &image {
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#[cfg(feature = "image")]
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layer::Image::Raster { handle, bounds } => {
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if let Some(atlas_entry) = raster_cache.upload(
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handle,
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device,
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encoder,
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&mut self.texture_atlas,
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) {
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add_instances(
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[bounds.x, bounds.y],
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[bounds.width, bounds.height],
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atlas_entry,
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instances,
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);
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}
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}
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#[cfg(not(feature = "image"))]
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layer::Image::Raster { .. } => {}
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#[cfg(feature = "svg")]
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layer::Image::Vector { handle, bounds } => {
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let size = [bounds.width, bounds.height];
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if let Some(atlas_entry) = vector_cache.upload(
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handle,
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size,
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_scale,
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device,
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encoder,
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&mut self.texture_atlas,
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) {
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add_instances(
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[bounds.x, bounds.y],
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size,
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atlas_entry,
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instances,
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);
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}
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}
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#[cfg(not(feature = "svg"))]
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layer::Image::Vector { .. } => {}
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}
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}
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if instances.is_empty() {
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return;
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}
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let texture_version = self.texture_atlas.layer_count();
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if self.texture_version != texture_version {
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log::info!("Atlas has grown. Recreating bind group...");
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self.texture =
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device.create_bind_group(&wgpu::BindGroupDescriptor {
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label: None,
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layout: &self.texture_layout,
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bindings: &[wgpu::Binding {
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binding: 0,
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resource: wgpu::BindingResource::TextureView(
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&self.texture_atlas.view(),
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),
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}],
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});
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self.texture_version = texture_version;
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}
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let uniforms_buffer = device.create_buffer_with_data(
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Uniforms {
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transform: transformation.into(),
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}
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.as_bytes(),
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wgpu::BufferUsage::COPY_SRC,
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);
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encoder.copy_buffer_to_buffer(
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&uniforms_buffer,
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0,
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&self.uniforms,
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0,
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std::mem::size_of::<Uniforms>() as u64,
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);
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let instances_buffer = device.create_buffer_with_data(
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instances.as_bytes(),
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wgpu::BufferUsage::COPY_SRC,
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);
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let mut i = 0;
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let total = instances.len();
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while i < total {
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let end = (i + Instance::MAX).min(total);
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let amount = end - i;
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encoder.copy_buffer_to_buffer(
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&instances_buffer,
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(i * std::mem::size_of::<Instance>()) as u64,
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&self.instances,
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0,
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(amount * std::mem::size_of::<Instance>()) as u64,
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);
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let mut render_pass =
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encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
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color_attachments: &[
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wgpu::RenderPassColorAttachmentDescriptor {
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attachment: target,
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resolve_target: None,
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load_op: wgpu::LoadOp::Load,
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store_op: wgpu::StoreOp::Store,
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clear_color: wgpu::Color {
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r: 0.0,
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g: 0.0,
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b: 0.0,
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a: 0.0,
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},
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},
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],
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depth_stencil_attachment: None,
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});
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render_pass.set_pipeline(&self.pipeline);
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render_pass.set_bind_group(0, &self.constants, &[]);
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render_pass.set_bind_group(1, &self.texture, &[]);
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render_pass.set_index_buffer(&self.indices, 0, 0);
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render_pass.set_vertex_buffer(0, &self.vertices, 0, 0);
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render_pass.set_vertex_buffer(1, &self.instances, 0, 0);
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render_pass.set_scissor_rect(
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bounds.x,
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bounds.y,
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bounds.width,
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bounds.height,
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);
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render_pass.draw_indexed(
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0..QUAD_INDICES.len() as u32,
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0,
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0..amount as u32,
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);
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i += Instance::MAX;
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}
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}
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pub fn trim_cache(&mut self) {
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#[cfg(feature = "image")]
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self.raster_cache.borrow_mut().trim(&mut self.texture_atlas);
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#[cfg(feature = "svg")]
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self.vector_cache.borrow_mut().trim(&mut self.texture_atlas);
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}
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}
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#[repr(C)]
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#[derive(Clone, Copy, AsBytes)]
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pub struct Vertex {
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_position: [f32; 2],
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}
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const QUAD_INDICES: [u16; 6] = [0, 1, 2, 0, 2, 3];
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const QUAD_VERTS: [Vertex; 4] = [
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Vertex {
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_position: [0.0, 0.0],
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},
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Vertex {
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_position: [1.0, 0.0],
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},
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Vertex {
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_position: [1.0, 1.0],
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},
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Vertex {
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_position: [0.0, 1.0],
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},
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];
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#[repr(C)]
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#[derive(Debug, Clone, Copy, AsBytes)]
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struct Instance {
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_position: [f32; 2],
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_size: [f32; 2],
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_position_in_atlas: [f32; 2],
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_size_in_atlas: [f32; 2],
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_layer: u32,
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}
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impl Instance {
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pub const MAX: usize = 1_000;
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}
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#[repr(C)]
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#[derive(Debug, Clone, Copy, AsBytes)]
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struct Uniforms {
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transform: [f32; 16],
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}
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fn add_instances(
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image_position: [f32; 2],
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image_size: [f32; 2],
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entry: &atlas::Entry,
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instances: &mut Vec<Instance>,
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) {
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match entry {
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atlas::Entry::Contiguous(allocation) => {
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add_instance(image_position, image_size, allocation, instances);
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}
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atlas::Entry::Fragmented { fragments, size } => {
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let scaling_x = image_size[0] / size.0 as f32;
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let scaling_y = image_size[1] / size.1 as f32;
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for fragment in fragments {
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let allocation = &fragment.allocation;
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let [x, y] = image_position;
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let (fragment_x, fragment_y) = fragment.position;
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let (fragment_width, fragment_height) = allocation.size();
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let position = [
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x + fragment_x as f32 * scaling_x,
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y + fragment_y as f32 * scaling_y,
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];
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let size = [
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fragment_width as f32 * scaling_x,
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fragment_height as f32 * scaling_y,
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];
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add_instance(position, size, allocation, instances);
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}
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}
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}
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}
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#[inline]
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fn add_instance(
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position: [f32; 2],
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size: [f32; 2],
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allocation: &atlas::Allocation,
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instances: &mut Vec<Instance>,
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) {
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let (x, y) = allocation.position();
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let (width, height) = allocation.size();
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let layer = allocation.layer();
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let instance = Instance {
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_position: position,
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_size: size,
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_position_in_atlas: [
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(x as f32 + 0.5) / atlas::SIZE as f32,
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(y as f32 + 0.5) / atlas::SIZE as f32,
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],
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_size_in_atlas: [
|
|
(width as f32 - 1.0) / atlas::SIZE as f32,
|
|
(height as f32 - 1.0) / atlas::SIZE as f32,
|
|
],
|
|
_layer: layer as u32,
|
|
};
|
|
|
|
instances.push(instance);
|
|
}
|