58 lines
1.6 KiB
Rust
58 lines
1.6 KiB
Rust
//use super::utils::create_debug_label;
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use bytemuck::{Pod, Zeroable};
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use wgpu::util::DeviceExt;
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#[derive(Debug)]
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pub struct Globals {
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bind_group: wgpu::BindGroup,
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_buffer: wgpu::Buffer,
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}
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#[repr(C)]
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#[derive(Copy, Clone, Debug, Pod, Zeroable)]
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pub struct GlobalsUniform {
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view_matrix: [[f32; 4]; 4],
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}
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impl Globals {
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pub fn new(
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device: &wgpu::Device,
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layout: &wgpu::BindGroupLayout,
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viewport_width: u32,
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viewport_height: u32,
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) -> Self {
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let temp_label = create_debug_label!("Globals buffer");
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let buffer = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
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label: temp_label.as_deref(),
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contents: bytemuck::cast_slice(&[GlobalsUniform {
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view_matrix: [
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[1.0 / (viewport_width as f32 / 2.0), 0.0, 0.0, 0.0],
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[0.0, -1.0 / (viewport_height as f32 / 2.0), 0.0, 0.0],
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[0.0, 0.0, 1.0, 0.0],
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[-1.0, 1.0, 0.0, 1.0],
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],
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}]),
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usage: wgpu::BufferUsages::UNIFORM,
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});
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let bind_group_label = create_debug_label!("Globals bind group");
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let bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor {
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label: bind_group_label.as_deref(),
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layout: &layout,
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entries: &[wgpu::BindGroupEntry {
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binding: 0,
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resource: buffer.as_entire_binding(),
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}],
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});
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Self {
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bind_group,
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_buffer: buffer,
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}
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}
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pub fn bind_group(&self) -> &wgpu::BindGroup {
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&self.bind_group
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}
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}
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