53 lines
1.3 KiB
Rust
53 lines
1.3 KiB
Rust
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use array_concat::concat_arrays;
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use librashader_runtime::quad::QuadType;
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use wgpu::util::{BufferInitDescriptor, DeviceExt};
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use wgpu::{Buffer, BufferDescriptor, Device, RenderPass};
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#[rustfmt::skip]
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const VBO_OFFSCREEN: [f32; 16] = [
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// Offscreen
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-1.0f32, -1.0, 0.0, 0.0,
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-1.0, 1.0, 0.0, 1.0,
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1.0, -1.0, 1.0, 0.0,
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1.0, 1.0, 1.0, 1.0,
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];
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#[rustfmt::skip]
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const VBO_DEFAULT_FINAL: [f32; 16] = [
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// Final
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0.0f32, 0.0, 0.0, 0.0,
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0.0, 1.0, 0.0, 1.0,
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1.0, 0.0, 1.0, 0.0,
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1.0, 1.0, 1.0, 1.0,
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];
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static VBO_DATA: &[f32; 32] = &concat_arrays!(VBO_OFFSCREEN, VBO_DEFAULT_FINAL);
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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 bind_vbo_for_frame<'a, 'b: 'a>(&'b self, cmd: &mut RenderPass<'a>) {
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cmd.set_vertex_buffer(0, self.buffer.slice(0..));
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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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let offset = match vbo {
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QuadType::Offscreen => 0..3,
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QuadType::Final => 1..4,
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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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