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lib.rs
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lib.rs
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mod render_ctx;
mod pico_svg;
pub use render_ctx::PietGpuRenderContext;
use rand::{Rng, RngCore};
use piet::kurbo::{BezPath, Circle, Line, Point, Vec2};
use piet::{Color, RenderContext};
use piet_gpu_hal::{CmdBuf, Device, Error, ImageLayout, MemFlags};
use pico_svg::PicoSvg;
pub const WIDTH: usize = TILE_W * WIDTH_IN_TILES;
pub const HEIGHT: usize = TILE_H * HEIGHT_IN_TILES;
const TILE_W: usize = 16;
const TILE_H: usize = 16;
const WIDTH_IN_TILEGROUPS: usize = 4;
const HEIGHT_IN_TILEGROUPS: usize = 96;
const TILEGROUP_STRIDE: usize = 2048;
const WIDTH_IN_TILES: usize = 128;
const HEIGHT_IN_TILES: usize = 96;
const PTCL_INITIAL_ALLOC: usize = 1024;
const K2_PER_TILE_SIZE: usize = 8;
const N_CIRCLES: usize = 1;
pub fn render_scene(rc: &mut impl RenderContext) {
let mut rng = rand::thread_rng();
for _ in 0..N_CIRCLES {
let color = Color::from_rgba32_u32(rng.next_u32());
let center = Point::new(
rng.gen_range(0.0, WIDTH as f64),
rng.gen_range(0.0, HEIGHT as f64),
);
let radius = rng.gen_range(0.0, 50.0);
let circle = Circle::new(center, radius);
rc.fill(circle, &color);
}
let mut path = BezPath::new();
path.move_to((100.0, 1150.0));
path.line_to((200.0, 1200.0));
path.line_to((150.0, 1250.0));
path.close_path();
rc.fill(path, &Color::rgb8(128, 0, 128));
rc.stroke(
Line::new((100.0, 100.0), (200.0, 150.0)),
&Color::WHITE,
5.0,
);
//render_cardioid(rc);
render_tiger(rc);
}
#[allow(unused)]
fn render_cardioid(rc: &mut impl RenderContext) {
let n = 91;
let dth = std::f64::consts::PI * 2.0 / (n as f64);
let center = Point::new(1024.0, 768.0);
let r = 750.0;
let mut path = BezPath::new();
for i in 1..n {
let p0 = center + Vec2::from_angle(i as f64 * dth) * r;
let p1 = center + Vec2::from_angle(((i * 2) % n) as f64 * dth) * r;
rc.fill(&Circle::new(p0, 8.0), &Color::WHITE);
path.move_to(p0);
path.line_to(p1);
//rc.stroke(Line::new(p0, p1), &Color::BLACK, 2.0);
}
rc.stroke(&path, &Color::BLACK, 2.0);
}
fn render_tiger(rc: &mut impl RenderContext) {
let xml_str = std::str::from_utf8(include_bytes!("../Ghostscript_Tiger.svg")).unwrap();
let start = std::time::Instant::now();
let svg = PicoSvg::load(xml_str, 8.0).unwrap();
println!("parsing time: {:?}", start.elapsed());
let start = std::time::Instant::now();
svg.render(rc);
println!("flattening and encoding time: {:?}", start.elapsed());
}
#[allow(unused)]
fn dump_scene(buf: &[u8]) {
for i in 0..(buf.len() / 4) {
let mut buf_u32 = [0u8; 4];
buf_u32.copy_from_slice(&buf[i * 4..i * 4 + 4]);
println!("{:4x}: {:8x}", i * 4, u32::from_le_bytes(buf_u32));
}
}
#[allow(unused)]
fn dump_k1_data(k1_buf: &[u32]) {
for i in 0..k1_buf.len() {
if k1_buf[i] != 0 {
println!("{:4x}: {:8x}", i, k1_buf[i]);
}
}
}
pub struct Renderer<D: Device> {
pub image_dev: D::Image, // resulting image
scene_buf: D::Buffer,
scene_dev: D::Buffer,
k1_alloc_buf_host: D::Buffer,
k1_alloc_buf_dev: D::Buffer,
k2s_alloc_buf_host: D::Buffer,
k2s_alloc_buf_dev: D::Buffer,
k2f_alloc_buf_host: D::Buffer,
k2f_alloc_buf_dev: D::Buffer,
k3_alloc_buf_host: D::Buffer,
k3_alloc_buf_dev: D::Buffer,
tilegroup_buf: D::Buffer,
ptcl_buf: D::Buffer,
k1_pipeline: D::Pipeline,
k1_ds: D::DescriptorSet,
k2s_pipeline: D::Pipeline,
k2s_ds: D::DescriptorSet,
k2f_pipeline: D::Pipeline,
k2f_ds: D::DescriptorSet,
k3_pipeline: D::Pipeline,
k3_ds: D::DescriptorSet,
k4_pipeline: D::Pipeline,
k4_ds: D::DescriptorSet,
}
impl<D: Device> Renderer<D> {
pub unsafe fn new(device: &D, scene: &[u8]) -> Result<Self, Error> {
let host = MemFlags::host_coherent();
let dev = MemFlags::device_local();
let scene_buf = device
.create_buffer(std::mem::size_of_val(&scene[..]) as u64, host)
.unwrap();
let scene_dev = device
.create_buffer(std::mem::size_of_val(&scene[..]) as u64, dev)
.unwrap();
device.write_buffer(&scene_buf, &scene)?;
let tilegroup_buf = device.create_buffer(4 * 1024 * 1024, dev)?;
let ptcl_buf = device.create_buffer(48 * 1024 * 1024, dev)?;
let segment_buf = device.create_buffer(64 * 1024 * 1024, dev)?;
let fill_seg_buf = device.create_buffer(64 * 1024 * 1024, dev)?;
let image_dev = device.create_image2d(WIDTH as u32, HEIGHT as u32, dev)?;
let k1_alloc_buf_host = device.create_buffer(4, host)?;
let k1_alloc_buf_dev = device.create_buffer(4, dev)?;
let k1_alloc_start = WIDTH_IN_TILEGROUPS * HEIGHT_IN_TILEGROUPS * TILEGROUP_STRIDE;
device.write_buffer(&k1_alloc_buf_host, &[k1_alloc_start as u32])?;
let k1_code = include_bytes!("../shader/kernel1.spv");
let k1_pipeline = device
.create_simple_compute_pipeline(k1_code, 3, 0)?;
let k1_ds = device
.create_descriptor_set(
&k1_pipeline,
&[&scene_dev, &tilegroup_buf, &k1_alloc_buf_dev],
&[],
)?;
let k2s_alloc_buf_host = device.create_buffer(4, host)?;
let k2s_alloc_buf_dev = device.create_buffer(4, dev)?;
let k2s_alloc_start = WIDTH_IN_TILES * HEIGHT_IN_TILES * K2_PER_TILE_SIZE;
device
.write_buffer(&k2s_alloc_buf_host, &[k2s_alloc_start as u32])
?;
let k2s_code = include_bytes!("../shader/kernel2s.spv");
let k2s_pipeline = device
.create_simple_compute_pipeline(k2s_code, 4, 0)
?;
let k2s_ds = device
.create_descriptor_set(
&k2s_pipeline,
&[&scene_dev, &tilegroup_buf, &segment_buf, &k2s_alloc_buf_dev],
&[],
)
?;
let k2f_alloc_buf_host = device.create_buffer(4, host)?;
let k2f_alloc_buf_dev = device.create_buffer(4, dev)?;
let k2f_alloc_start = WIDTH_IN_TILES * HEIGHT_IN_TILES * K2_PER_TILE_SIZE;
device
.write_buffer(&k2f_alloc_buf_host, &[k2f_alloc_start as u32])
?;
let k2f_code = include_bytes!("../shader/kernel2f.spv");
let k2f_pipeline = device.create_simple_compute_pipeline(k2f_code, 4, 0)?;
let k2f_ds = device
.create_descriptor_set(
&k2f_pipeline,
&[
&scene_dev,
&tilegroup_buf,
&fill_seg_buf,
&k2f_alloc_buf_dev,
],
&[],
)
?;
let k3_alloc_buf_host = device.create_buffer(4, host)?;
let k3_alloc_buf_dev = device.create_buffer(4, dev)?;
let k3_alloc_start = WIDTH_IN_TILES * HEIGHT_IN_TILES * PTCL_INITIAL_ALLOC;
device
.write_buffer(&k3_alloc_buf_host, &[k3_alloc_start as u32])
?;
let k3_code = include_bytes!("../shader/kernel3.spv");
let k3_pipeline = device.create_simple_compute_pipeline(k3_code, 6, 0)?;
let k3_ds = device
.create_descriptor_set(
&k3_pipeline,
&[
&scene_dev,
&tilegroup_buf,
&segment_buf,
&fill_seg_buf,
&ptcl_buf,
&k3_alloc_buf_dev,
],
&[],
)
?;
let k4_code = include_bytes!("../shader/kernel4.spv");
let k4_pipeline = device.create_simple_compute_pipeline(k4_code, 3, 1)?;
let k4_ds = device
.create_descriptor_set(&k4_pipeline, &[&ptcl_buf, &segment_buf, &fill_seg_buf], &[&image_dev])
?;
Ok(Renderer {
scene_buf,
scene_dev,
image_dev,
k1_alloc_buf_host,
k1_alloc_buf_dev,
k2s_alloc_buf_host,
k2s_alloc_buf_dev,
k2f_alloc_buf_host,
k2f_alloc_buf_dev,
k3_alloc_buf_host,
k3_alloc_buf_dev,
tilegroup_buf,
ptcl_buf,
k1_pipeline,
k1_ds,
k2s_pipeline,
k2s_ds,
k2f_pipeline,
k2f_ds,
k3_pipeline,
k3_ds,
k4_pipeline,
k4_ds,
})
}
pub unsafe fn record(&self, cmd_buf: &mut impl CmdBuf<D>, query_pool: &D::QueryPool) {
cmd_buf.copy_buffer(&self.scene_buf, &self.scene_dev);
// Note: we could use one alloc buf and reuse it. But we'll stick with
// multiple ones for clarity.
cmd_buf.copy_buffer(&self.k1_alloc_buf_host, &self.k1_alloc_buf_dev);
cmd_buf.copy_buffer(&self.k2s_alloc_buf_host, &self.k2s_alloc_buf_dev);
cmd_buf.copy_buffer(&self.k2f_alloc_buf_host, &self.k2f_alloc_buf_dev);
cmd_buf.copy_buffer(&self.k3_alloc_buf_host, &self.k3_alloc_buf_dev);
// Note: these clears aren't necessary, and are here to make inspection
// of the buffers cleaner. Can likely be removed.
cmd_buf.clear_buffer(&self.tilegroup_buf);
cmd_buf.clear_buffer(&self.ptcl_buf);
cmd_buf.memory_barrier();
cmd_buf.image_barrier(&self.image_dev, ImageLayout::Undefined, ImageLayout::General);
cmd_buf.reset_query_pool(&query_pool);
cmd_buf.write_timestamp(&query_pool, 0);
cmd_buf.dispatch(
&self.k1_pipeline,
&self.k1_ds,
((WIDTH / 512) as u32, (HEIGHT / 512) as u32, 1),
);
cmd_buf.write_timestamp(&query_pool, 1);
cmd_buf.memory_barrier();
cmd_buf.dispatch(
&self.k2s_pipeline,
&self.k2s_ds,
((WIDTH / 512) as u32, (HEIGHT / 16) as u32, 1),
);
cmd_buf.write_timestamp(&query_pool, 2);
// Note: this barrier is not necessary (k2f does not depend on
// k2s output), but I'm keeping it here to increase transparency
// of performance.
cmd_buf.memory_barrier();
cmd_buf.dispatch(
&self.k2f_pipeline,
&self.k2f_ds,
((WIDTH / 512) as u32, (HEIGHT / 16) as u32, 2),
);
cmd_buf.write_timestamp(&query_pool, 3);
cmd_buf.memory_barrier();
cmd_buf.dispatch(
&self.k3_pipeline,
&self.k3_ds,
((WIDTH / 512) as u32, (HEIGHT / 16) as u32, 3),
);
cmd_buf.write_timestamp(&query_pool, 4);
cmd_buf.memory_barrier();
cmd_buf.dispatch(
&self.k4_pipeline,
&self.k4_ds,
((WIDTH / TILE_W) as u32, (HEIGHT / TILE_H) as u32, 1),
);
cmd_buf.write_timestamp(&query_pool, 5);
cmd_buf.memory_barrier();
cmd_buf.image_barrier(&self.image_dev, ImageLayout::General, ImageLayout::BlitSrc);
}
}