Struct ResizingBuffer

pub struct ResizingBuffer<T: Copy> {
    pub label: String,
    pub usage: BufferUsages,
    pub buffer_and_len: Option<(Buffer, usize)>,
    pub contents: Vec<T>,
}

Fields

label: String

usage: BufferUsages

buffer_and_len: Option<(Buffer, usize)>

The size of the buffer in bytes is std::mem::size_of::<T>() * len.

contents: Vec<T>

Implementations

impl<T: Copy> ResizingBuffer<T>

pub fn new(label: &str, usage: BufferUsages) -> Self

pub fn update<'a>(&'a mut self, device: &Device, queue: &Queue) -> usize

pub fn get_slice<'a>(&'a self) -> Option<BufferSlice<'a>>

Examples found in repository

examples/test.rs (line 108)

  fn paint<'rp>(
    &mut self,
    rd: &'rp RenderData,
    resources: &'rp Self::RenderResources,
    _info: eframe::epaint::PaintCallbackInfo,
    render_pass: &mut wgpu::RenderPass<'rp>,
  ) {
    render_pass.set_pipeline(&resources.main_pipeline);
    render_pass.set_bind_group(0, &rd.main_uniforms.bind_group, &[]);
    render_pass.set_vertex_buffer(0, resources.trianges.vertex_buffer.get_slice().unwrap());
    render_pass.set_index_buffer(
      resources.trianges.index_buffer.get_slice().unwrap(),
      wgpu::IndexFormat::Uint32,
    );
    render_pass.draw_indexed(0..resources.trianges.index_buffer.len() as u32, 0, 0..1);
  }

pub fn clear(&mut self)

pub fn push(&mut self, value: T)

pub fn extend_from_slice(&mut self, values: &[T])

Examples found in repository

examples/test.rs (lines 77-93)

  fn prepare(
    &mut self,
    _rd: &mut RenderData,
    resources: &mut Self::RenderResources,
    device: &wgpu::Device,
    queue: &wgpu::Queue,
    _encoder: &mut wgpu::CommandEncoder,
    _screen_size: (u32, u32),
  ) -> Vec<wgpu::CommandBuffer> {
    resources.trianges.clear();
    resources.trianges.vertex_buffer.extend_from_slice(&[
      Vertex {
        position: [0.0, 0.0, 0.0],
        color:    [1.0, 0.0, 0.0, 1.0],
        uv:       [0.0, 0.0],
      },
      Vertex {
        position: [1.0, 0.0, 0.0],
        color:    [0.0, 1.0, 0.0, 1.0],
        uv:       [0.0, 0.0],
      },
      Vertex {
        position: [0.0, 1.0, 0.0],
        color:    [0.0, 0.0, 1.0, 1.0],
        uv:       [0.0, 0.0],
      },
    ]);
    resources.trianges.index_buffer.extend_from_slice(&[0, 1, 2]);
    resources.trianges.update(device, queue);
    Vec::new()
  }

pub fn len(&self) -> usize

Examples found in repository

examples/test.rs (line 113)

  fn paint<'rp>(
    &mut self,
    rd: &'rp RenderData,
    resources: &'rp Self::RenderResources,
    _info: eframe::epaint::PaintCallbackInfo,
    render_pass: &mut wgpu::RenderPass<'rp>,
  ) {
    render_pass.set_pipeline(&resources.main_pipeline);
    render_pass.set_bind_group(0, &rd.main_uniforms.bind_group, &[]);
    render_pass.set_vertex_buffer(0, resources.trianges.vertex_buffer.get_slice().unwrap());
    render_pass.set_index_buffer(
      resources.trianges.index_buffer.get_slice().unwrap(),
      wgpu::IndexFormat::Uint32,
    );
    render_pass.draw_indexed(0..resources.trianges.index_buffer.len() as u32, 0, 0..1);
  }