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use crate::draw::texture::TextureRepo;
use hal::pso::{Rect, ShaderStageFlags};
use super::UiPoint;
use crate::draw::buffers::DrawBuffers;
use crate::types::*;
use crate::UiState;
use anyhow::{anyhow, Result};
use egui::{ClippedMesh, TextureId};
use std::{array::IntoIter, convert::TryInto, iter::empty};
use stockton_types::Vector2;
pub fn do_render(
cmd_buffer: &mut CommandBufferT,
pipeline_layout: &PipelineLayoutT,
draw_buffers: &mut DrawBuffers<UiPoint>,
tex_repo: &mut TextureRepo,
ui: &mut UiState,
) -> Result<()> {
// TODO: Actual UI Rendering
let (_out, shapes) = ui.end_frame();
let screen = ui.dimensions().ok_or(anyhow!("UI not set up properly."))?;
let shapes = ui.ctx().tessellate(shapes);
for ClippedMesh(rect, tris) in shapes.iter() {
assert!(tris.texture_id == TextureId::Egui);
// Copy triangles/indicies
for i in (0..tris.indices.len()).step_by(3) {
draw_buffers.index_buffer[i / 3] = (
tris.indices[i].try_into()?,
tris.indices[i + 1].try_into()?,
tris.indices[i + 2].try_into()?,
);
// eprintln!(
// "{} {}",
// tris.vertices[tris.indices[i] as usize].uv.x,
// tris.vertices[tris.indices[i] as usize].uv.y
// );
// eprintln!(
// "{} {}",
// tris.vertices[tris.indices[i + 1] as usize].uv.x,
// tris.vertices[tris.indices[i + 1] as usize].uv.y
// );
// eprintln!(
// "{} {}",
// tris.vertices[tris.indices[i + 2] as usize].uv.x,
// tris.vertices[tris.indices[i + 2] as usize].uv.y
// );
}
for (i, vertex) in tris.vertices.iter().enumerate() {
draw_buffers.vertex_buffer[i] = UiPoint(
Vector2::new(vertex.pos.x, vertex.pos.y),
Vector2::new(vertex.uv.x, vertex.uv.y),
[
vertex.color.r() as f32 / 255.0,
vertex.color.g() as f32 / 255.0,
vertex.color.b() as f32 / 255.0,
vertex.color.a() as f32 / 255.0,
],
);
}
// TODO: *Properly* deal with textures
if let Some(ds) = tex_repo.attempt_get_descriptor_set(0) {
unsafe {
cmd_buffer.push_graphics_constants(
pipeline_layout,
ShaderStageFlags::VERTEX,
0,
&[screen.x.to_bits(), screen.y.to_bits()],
);
cmd_buffer.set_scissors(
0,
IntoIter::new([Rect {
x: rect.min.x as i16,
y: rect.min.y as i16,
w: rect.width() as i16,
h: rect.height() as i16,
}]),
);
cmd_buffer.bind_graphics_descriptor_sets(
pipeline_layout,
0,
IntoIter::new([ds]),
empty(),
);
// Call draw
cmd_buffer.draw_indexed(0..tris.indices.len() as u32, 0, 0..1);
}
} else {
// tex_repo.queue_load(0);
}
}
Ok(())
}
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