72 lines
1.8 KiB
Rust
72 lines
1.8 KiB
Rust
use array_concat::concat_arrays;
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use librashader_runtime::quad::{QuadType, VertexInput};
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use wgpu::util::{BufferInitDescriptor, DeviceExt};
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use wgpu::{Buffer, Device, RenderPass};
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const OFFSCREEN_VBO_DATA: [VertexInput; 4] = [
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VertexInput {
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position: [-1.0, -1.0, 0.0, 1.0],
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texcoord: [0.0, 0.0],
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},
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VertexInput {
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position: [-1.0, 1.0, 0.0, 1.0],
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texcoord: [0.0, 1.0],
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},
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VertexInput {
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position: [1.0, -1.0, 0.0, 1.0],
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texcoord: [1.0, 0.0],
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},
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VertexInput {
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position: [1.0, 1.0, 0.0, 1.0],
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texcoord: [1.0, 1.0],
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},
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];
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const FINAL_VBO_DATA: [VertexInput; 4] = [
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VertexInput {
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position: [0.0, 0.0, 0.0, 1.0],
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texcoord: [0.0, 0.0],
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},
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VertexInput {
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position: [0.0, 1.0, 0.0, 1.0],
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texcoord: [0.0, 1.0],
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},
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VertexInput {
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position: [1.0, 0.0, 0.0, 1.0],
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texcoord: [1.0, 0.0],
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},
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VertexInput {
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position: [1.0, 1.0, 0.0, 1.0],
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texcoord: [1.0, 1.0],
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},
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];
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static VBO_DATA: &[VertexInput; 8] = &concat_arrays!(OFFSCREEN_VBO_DATA, FINAL_VBO_DATA);
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pub struct DrawQuad {
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buffer: Buffer,
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}
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impl DrawQuad {
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pub fn new(device: &Device) -> DrawQuad {
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let buffer = device.create_buffer_init(&BufferInitDescriptor {
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label: Some("librashader vbo"),
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contents: bytemuck::cast_slice(VBO_DATA),
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usage: wgpu::BufferUsages::VERTEX,
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});
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DrawQuad { buffer }
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}
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pub fn draw_quad<'a, 'b: 'a>(&'b self, cmd: &mut RenderPass<'a>, vbo: QuadType) {
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cmd.set_vertex_buffer(0, self.buffer.slice(0..));
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let offset = match vbo {
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QuadType::Offscreen => 0..4,
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QuadType::Final => 4..8,
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};
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cmd.draw(offset, 0..1)
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}
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}
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