564 lines
18 KiB
Rust
564 lines
18 KiB
Rust
use crate::core::Rectangle;
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use crate::graphics::Transformation;
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use crate::layer;
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use std::mem;
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use wgpu::util::DeviceExt;
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#[cfg(feature = "tracing")]
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use tracing::info_span;
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const INITIAL_INSTANCES: usize = 10_000;
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#[derive(Debug)]
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pub struct Pipeline {
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solid: solid::Pipeline,
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gradient: gradient::Pipeline,
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constant_layout: wgpu::BindGroupLayout,
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vertices: wgpu::Buffer,
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indices: wgpu::Buffer,
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layers: Vec<Layer>,
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prepare_layer: usize,
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}
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impl Pipeline {
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pub fn new(device: &wgpu::Device, format: wgpu::TextureFormat) -> Pipeline {
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let constant_layout =
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device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
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label: Some("iced_wgpu::quad uniforms layout"),
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entries: &[wgpu::BindGroupLayoutEntry {
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binding: 0,
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visibility: wgpu::ShaderStages::VERTEX,
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ty: wgpu::BindingType::Buffer {
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ty: wgpu::BufferBindingType::Uniform,
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has_dynamic_offset: false,
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min_binding_size: wgpu::BufferSize::new(
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mem::size_of::<Uniforms>() as wgpu::BufferAddress,
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),
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},
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count: None,
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}],
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});
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let vertices =
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device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
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label: Some("iced_wgpu::quad vertex buffer"),
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contents: bytemuck::cast_slice(&VERTICES),
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usage: wgpu::BufferUsages::VERTEX,
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});
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let indices =
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device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
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label: Some("iced_wgpu::quad index buffer"),
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contents: bytemuck::cast_slice(&INDICES),
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usage: wgpu::BufferUsages::INDEX,
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});
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Self {
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vertices,
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indices,
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solid: solid::Pipeline::new(device, format, &constant_layout),
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gradient: gradient::Pipeline::new(device, format, &constant_layout),
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layers: Vec::new(),
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prepare_layer: 0,
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constant_layout,
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}
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}
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pub fn prepare(
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&mut self,
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device: &wgpu::Device,
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queue: &wgpu::Queue,
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instances: &layer::Quads,
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transformation: Transformation,
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scale: f32,
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) {
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if self.layers.len() <= self.prepare_layer {
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self.layers.push(Layer::new(device, &self.constant_layout));
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}
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let layer = &mut self.layers[self.prepare_layer];
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layer.prepare(device, queue, instances, transformation, scale);
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self.prepare_layer += 1;
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}
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pub fn render<'a>(
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&'a self,
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layer: usize,
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bounds: Rectangle<u32>,
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render_pass: &mut wgpu::RenderPass<'a>,
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) {
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if let Some(layer) = self.layers.get(layer) {
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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.set_index_buffer(
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self.indices.slice(..),
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wgpu::IndexFormat::Uint16,
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);
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render_pass.set_vertex_buffer(0, self.vertices.slice(..));
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if layer.solid.instance_count > 0 {
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render_pass.set_pipeline(&self.solid.pipeline);
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layer.solid.draw(&layer.constants, render_pass);
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}
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if layer.gradient.instance_count > 0 {
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render_pass.set_pipeline(&self.gradient.pipeline);
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layer.gradient.draw(&layer.constants, render_pass);
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}
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}
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}
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pub fn end_frame(&mut self) {
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self.prepare_layer = 0;
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}
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}
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#[derive(Debug)]
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struct Layer {
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constants: wgpu::BindGroup,
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constants_buffer: wgpu::Buffer,
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solid: solid::Layer,
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gradient: gradient::Layer,
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}
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impl Layer {
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pub fn new(
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device: &wgpu::Device,
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constant_layout: &wgpu::BindGroupLayout,
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) -> Self {
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let constants_buffer = device.create_buffer(&wgpu::BufferDescriptor {
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label: Some("iced_wgpu::quad uniforms buffer"),
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size: mem::size_of::<Uniforms>() as wgpu::BufferAddress,
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usage: wgpu::BufferUsages::UNIFORM | wgpu::BufferUsages::COPY_DST,
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mapped_at_creation: false,
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});
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let constants = device.create_bind_group(&wgpu::BindGroupDescriptor {
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label: Some("iced_wgpu::quad uniforms bind group"),
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layout: constant_layout,
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entries: &[wgpu::BindGroupEntry {
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binding: 0,
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resource: constants_buffer.as_entire_binding(),
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}],
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});
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Self {
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constants,
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constants_buffer,
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solid: solid::Layer::new(device),
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gradient: gradient::Layer::new(device),
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}
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}
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pub fn prepare(
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&mut self,
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device: &wgpu::Device,
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queue: &wgpu::Queue,
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instances: &layer::Quads,
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transformation: Transformation,
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scale: f32,
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) {
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#[cfg(feature = "tracing")]
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let _ = info_span!("Wgpu::Quad", "PREPARE").entered();
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let uniforms = Uniforms::new(transformation, scale);
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queue.write_buffer(
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&self.constants_buffer,
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0,
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bytemuck::bytes_of(&uniforms),
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);
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let _ = self.solid.instances.resize(device, instances.solids.len());
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let _ = self
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.gradient
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.instances
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.resize(device, instances.gradients.len());
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let _ =
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self.solid
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.instances
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.write(queue, 0, instances.solids.as_slice());
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self.solid.instance_count = instances.solids.len();
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let _ = self.gradient.instances.write(
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queue,
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0,
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instances.gradients.as_slice(),
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);
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self.gradient.instance_count = instances.gradients.len();
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}
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}
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mod solid {
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use crate::layer::quad;
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use crate::quad::{color_target_state, Vertex, INDICES, INITIAL_INSTANCES};
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use crate::Buffer;
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#[derive(Debug)]
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pub struct Pipeline {
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pub pipeline: wgpu::RenderPipeline,
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}
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#[derive(Debug)]
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pub struct Layer {
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pub instances: Buffer<quad::Solid>,
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pub instance_count: usize,
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}
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impl Layer {
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pub fn new(device: &wgpu::Device) -> Self {
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let instances = Buffer::new(
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device,
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"iced_wgpu.quad.solid.buffer",
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INITIAL_INSTANCES,
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wgpu::BufferUsages::VERTEX | wgpu::BufferUsages::COPY_DST,
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);
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Self {
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instances,
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instance_count: 0,
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}
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}
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pub fn draw<'a>(
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&'a self,
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constants: &'a wgpu::BindGroup,
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render_pass: &mut wgpu::RenderPass<'a>,
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) {
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#[cfg(feature = "tracing")]
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let _ = tracing::info_span!("Wgpu::Quad::Solid", "DRAW").entered();
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render_pass.set_bind_group(0, constants, &[]);
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render_pass.set_vertex_buffer(1, self.instances.slice(..));
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render_pass.draw_indexed(
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0..INDICES.len() as u32,
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0,
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0..self.instance_count as u32,
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);
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}
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}
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impl Pipeline {
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pub fn new(
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device: &wgpu::Device,
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format: wgpu::TextureFormat,
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constants_layout: &wgpu::BindGroupLayout,
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) -> Self {
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let layout = device.create_pipeline_layout(
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&wgpu::PipelineLayoutDescriptor {
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label: Some("iced_wgpu.quad.solid.pipeline"),
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push_constant_ranges: &[],
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bind_group_layouts: &[constants_layout],
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},
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);
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let shader =
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device.create_shader_module(wgpu::ShaderModuleDescriptor {
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label: Some("iced_wgpu.quad.solid.shader"),
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source: wgpu::ShaderSource::Wgsl(
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std::borrow::Cow::Borrowed(include_str!(
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"shader/quad.wgsl"
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)),
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),
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});
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let pipeline = device.create_render_pipeline(
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&wgpu::RenderPipelineDescriptor {
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label: Some("iced_wgpu.quad.solid.pipeline"),
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layout: Some(&layout),
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vertex: wgpu::VertexState {
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module: &shader,
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entry_point: "solid_vs_main",
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buffers: &[
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Vertex::buffer_layout(),
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wgpu::VertexBufferLayout {
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array_stride: std::mem::size_of::<quad::Solid>()
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as u64,
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step_mode: wgpu::VertexStepMode::Instance,
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attributes: &wgpu::vertex_attr_array!(
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// Color
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1 => Float32x4,
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// Position
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2 => Float32x2,
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// Size
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3 => Float32x2,
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// Border color
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4 => Float32x4,
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// Border radius
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5 => Float32x4,
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// Border width
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6 => Float32,
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),
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},
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],
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},
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fragment: Some(wgpu::FragmentState {
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module: &shader,
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entry_point: "solid_fs_main",
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targets: &color_target_state(format),
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}),
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primitive: wgpu::PrimitiveState {
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topology: wgpu::PrimitiveTopology::TriangleList,
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front_face: wgpu::FrontFace::Cw,
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..Default::default()
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},
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depth_stencil: None,
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multisample: wgpu::MultisampleState {
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count: 1,
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mask: !0,
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alpha_to_coverage_enabled: false,
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},
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multiview: None,
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},
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);
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Self { pipeline }
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}
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}
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}
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mod gradient {
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use crate::layer::quad;
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use crate::quad::{color_target_state, Vertex, INDICES, INITIAL_INSTANCES};
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use crate::Buffer;
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#[derive(Debug)]
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pub struct Pipeline {
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pub pipeline: wgpu::RenderPipeline,
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}
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#[derive(Debug)]
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pub struct Layer {
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pub instances: Buffer<quad::Gradient>,
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pub instance_count: usize,
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}
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impl Layer {
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pub fn new(device: &wgpu::Device) -> Self {
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let instances = Buffer::new(
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device,
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"iced_wgpu.quad.gradient.buffer",
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INITIAL_INSTANCES,
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wgpu::BufferUsages::VERTEX | wgpu::BufferUsages::COPY_DST,
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);
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Self {
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instances,
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instance_count: 0,
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}
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}
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pub fn draw<'a>(
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&'a self,
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constants: &'a wgpu::BindGroup,
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render_pass: &mut wgpu::RenderPass<'a>,
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) {
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#[cfg(feature = "tracing")]
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let _ =
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tracing::info_span!("Wgpu::Quad::Gradient", "DRAW").entered();
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render_pass.set_bind_group(0, constants, &[]);
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render_pass.set_vertex_buffer(1, self.instances.slice(..));
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render_pass.draw_indexed(
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0..INDICES.len() as u32,
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0,
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0..self.instance_count as u32,
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);
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}
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}
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impl Pipeline {
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pub fn new(
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device: &wgpu::Device,
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format: wgpu::TextureFormat,
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constants_layout: &wgpu::BindGroupLayout,
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) -> Self {
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let layout = device.create_pipeline_layout(
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&wgpu::PipelineLayoutDescriptor {
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label: Some("iced_wgpu.quad.gradient.pipeline"),
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push_constant_ranges: &[],
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bind_group_layouts: &[constants_layout],
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},
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);
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let shader =
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device.create_shader_module(wgpu::ShaderModuleDescriptor {
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label: Some("iced_wgpu.quad.gradient.shader"),
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source: wgpu::ShaderSource::Wgsl(
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std::borrow::Cow::Borrowed(include_str!(
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"shader/quad.wgsl"
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)),
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),
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});
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let pipeline =
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device.create_render_pipeline(
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&wgpu::RenderPipelineDescriptor {
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label: Some("iced_wgpu.quad.gradient.pipeline"),
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layout: Some(&layout),
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vertex: wgpu::VertexState {
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module: &shader,
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entry_point: "gradient_vs_main",
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buffers: &[
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Vertex::buffer_layout(),
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wgpu::VertexBufferLayout {
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array_stride: std::mem::size_of::<
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quad::Gradient,
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>(
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)
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as u64,
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step_mode: wgpu::VertexStepMode::Instance,
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attributes: &wgpu::vertex_attr_array!(
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// Color 1
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1 => Float32x4,
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// Color 2
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2 => Float32x4,
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// Color 3
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3 => Float32x4,
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// Color 4
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4 => Float32x4,
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// Color 5
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5 => Float32x4,
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// Color 6
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6 => Float32x4,
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// Color 7
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7 => Float32x4,
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// Color 8
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8 => Float32x4,
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// Offsets 1-4
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9 => Float32x4,
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// Offsets 5-8
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10 => Float32x4,
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// Direction
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11 => Float32x4,
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// Position & Scale
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12 => Float32x4,
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// Border color
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13 => Float32x4,
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// Border radius
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14 => Float32x4,
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// Border width
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15 => Float32
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),
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},
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],
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},
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fragment: Some(wgpu::FragmentState {
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module: &shader,
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entry_point: "gradient_fs_main",
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targets: &color_target_state(format),
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}),
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primitive: wgpu::PrimitiveState {
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topology: wgpu::PrimitiveTopology::TriangleList,
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front_face: wgpu::FrontFace::Cw,
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..Default::default()
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},
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depth_stencil: None,
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multisample: wgpu::MultisampleState {
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count: 1,
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mask: !0,
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alpha_to_coverage_enabled: false,
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},
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multiview: None,
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},
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);
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Self { pipeline }
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}
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}
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}
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fn color_target_state(
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format: wgpu::TextureFormat,
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) -> [Option<wgpu::ColorTargetState>; 1] {
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[Some(wgpu::ColorTargetState {
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format,
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blend: Some(wgpu::BlendState {
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color: wgpu::BlendComponent {
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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: wgpu::BlendComponent {
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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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}),
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write_mask: wgpu::ColorWrites::ALL,
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})]
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}
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#[repr(C)]
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#[derive(Clone, Copy, bytemuck::Zeroable, bytemuck::Pod)]
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pub struct Vertex {
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_position: [f32; 2],
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}
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impl Vertex {
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fn buffer_layout<'a>() -> wgpu::VertexBufferLayout<'a> {
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wgpu::VertexBufferLayout {
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array_stride: mem::size_of::<Self>() as u64,
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step_mode: wgpu::VertexStepMode::Vertex,
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attributes: &[wgpu::VertexAttribute {
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shader_location: 0,
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format: wgpu::VertexFormat::Float32x2,
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offset: 0,
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}],
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}
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}
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}
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const INDICES: [u16; 6] = [0, 1, 2, 0, 2, 3];
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const VERTICES: [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, bytemuck::Zeroable, bytemuck::Pod)]
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struct Uniforms {
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transform: [f32; 16],
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scale: f32,
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// Uniforms must be aligned to their largest member,
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// this uses a mat4x4<f32> which aligns to 16, so align to that
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_padding: [f32; 3],
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}
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|
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impl Uniforms {
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fn new(transformation: Transformation, scale: f32) -> Uniforms {
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Self {
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transform: *transformation.as_ref(),
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scale,
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_padding: [0.0; 3],
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}
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}
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}
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impl Default for Uniforms {
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fn default() -> Self {
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Self {
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transform: *Transformation::identity().as_ref(),
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scale: 1.0,
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_padding: [0.0; 3],
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}
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}
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}
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