Add command line args for loading svg

Cargo.lock

@@ -26,6 +26,15 @@ version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "000444226fcff248f2bc4c7625be32c63caccfecc2723a2b9f78a7487a49c407"
 
+[[package]]
+name = "ansi_term"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
+dependencies = [
+ "winapi 0.3.8",
+]
+
 [[package]]
 name = "approx"
 version = "0.3.2"
@@ -59,6 +68,17 @@ dependencies = [
  "raw-window-handle",
 ]
 
+[[package]]
+name = "atty"
+version = "0.2.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
+dependencies = [
+ "hermit-abi",
+ "libc",
+ "winapi 0.3.8",
+]
+
 [[package]]
 name = "autocfg"
 version = "1.0.0"
@@ -106,6 +126,21 @@ version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
 
+[[package]]
+name = "clap"
+version = "2.33.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bdfa80d47f954d53a35a64987ca1422f495b8d6483c0fe9f7117b36c2a792129"
+dependencies = [
+ "ansi_term",
+ "atty",
+ "bitflags",
+ "strsim",
+ "textwrap",
+ "unicode-width",
+ "vec_map",
+]
+
 [[package]]
 name = "cloudabi"
 version = "0.0.3"
@@ -259,6 +294,15 @@ version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f36b5f248235f45773d4944f555f83ea61fe07b18b561ccf99d7483d7381e54d"
 
+[[package]]
+name = "hermit-abi"
+version = "0.1.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "91780f809e750b0a89f5544be56617ff6b1227ee485bcb06ebe10cdf89bd3b71"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "inflate"
 version = "0.4.5"
@@ -525,6 +569,7 @@ dependencies = [
 name = "piet-gpu"
 version = "0.1.0"
 dependencies = [
+ "clap",
  "piet",
  "piet-gpu-hal",
  "piet-gpu-types",
@@ -758,6 +803,12 @@ dependencies = [
  "byteorder",
 ]
 
+[[package]]
+name = "strsim"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
+
 [[package]]
 name = "syn"
 version = "1.0.17"
@@ -769,6 +820,21 @@ dependencies = [
  "unicode-xid 0.2.0",
 ]
 
+[[package]]
+name = "textwrap"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
+dependencies = [
+ "unicode-width",
+]
+
+[[package]]
+name = "unicode-width"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "caaa9d531767d1ff2150b9332433f32a24622147e5ebb1f26409d5da67afd479"
+
 [[package]]
 name = "unicode-xid"
 version = "0.1.0"
@@ -781,6 +847,12 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
 
+[[package]]
+name = "vec_map"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
+
 [[package]]
 name = "void"
 version = "1.0.2"

piet-gpu/Cargo.toml

@@ -26,3 +26,4 @@ png = "0.16.2"
 rand = "0.7.3"
 roxmltree = "0.11"
 winit = "0.22"
+clap = "2.33"

piet-gpu/bin/cli.rs

@@ -2,10 +2,12 @@ use std::fs::File;
 use std::io::BufWriter;
 use std::path::Path;
 
+use clap::{Arg, App};
+
 use piet_gpu_hal::vulkan::VkInstance;
 use piet_gpu_hal::{CmdBuf, Device, Error, MemFlags};
 
-use piet_gpu::{render_scene, PietGpuRenderContext, Renderer, HEIGHT, WIDTH};
+use piet_gpu::{render_scene, render_svg, PietGpuRenderContext, Renderer, HEIGHT, WIDTH};
 
 #[allow(unused)]
 fn dump_scene(buf: &[u8]) {
@@ -152,6 +154,17 @@ fn trace_ptcl(buf: &[u32]) {
 
 
 fn main() -> Result<(), Error> {
+    let matches = App::new("piet-gpu test")
+        .arg(Arg::with_name("INPUT")
+            .index(1))
+        .arg(Arg::with_name("flip")
+            .short("f")
+            .long("flip"))
+        .arg(Arg::with_name("scale")
+            .short("s")
+            .long("scale")
+            .takes_value(true))
+        .get_matches();
     let (instance, _) = VkInstance::new(None)?;
     unsafe {
         let device = instance.device(None)?;
@@ -161,7 +174,17 @@ fn main() -> Result<(), Error> {
         let query_pool = device.create_query_pool(5)?;
 
         let mut ctx = PietGpuRenderContext::new();
-        render_scene(&mut ctx);
+        if let Some(input) = matches.value_of("INPUT") {
+            let mut scale = matches.value_of("scale")
+                .map(|scale| scale.parse().unwrap())
+                .unwrap_or(8.0);
+            if matches.is_present("flip") {
+                scale = -scale;
+            }
+            render_svg(&mut ctx, input, scale);
+        } else {
+            render_scene(&mut ctx);
+        }
         let scene = ctx.get_scene_buf();
         //dump_scene(&scene);
 

piet-gpu/src/lib.rs

@@ -34,6 +34,17 @@ const N_CIRCLES: usize = 0;
 
 const N_WG: u32 = 16;
 
+pub fn render_svg(rc: &mut impl RenderContext, filename: &str, scale: f64) {
+    let xml_str = std::fs::read_to_string(filename).unwrap();
+    let start = std::time::Instant::now();
+    let svg = PicoSvg::load(&xml_str, scale).unwrap();
+    println!("parsing time: {:?}", start.elapsed());
+
+    let start = std::time::Instant::now();
+    svg.render(rc);
+    println!("flattening and encoding time: {:?}", start.elapsed());
+}
+
 pub fn render_scene(rc: &mut impl RenderContext) {
     let mut rng = rand::thread_rng();
     for _ in 0..N_CIRCLES {
@@ -138,7 +149,7 @@ pub struct Renderer<D: Device> {
 
     k4_pipeline: D::Pipeline,
     k4_ds: D::DescriptorSet,
- 
+
     n_elements: usize,
 }
 
@@ -177,13 +188,10 @@ impl<D: Device> Renderer<D> {
 
         // TODO: constants
         let bin_alloc_start = ((n_elements + 255) & !255) * 8;
-        device
-            .write_buffer(&bin_alloc_buf_host, &[
-                n_elements as u32,
-                0,
-                bin_alloc_start as u32,
-            ])
-            ?;
+        device.write_buffer(
+            &bin_alloc_buf_host,
+            &[n_elements as u32, 0, bin_alloc_start as u32],
+        )?;
         let bin_code = include_bytes!("../shader/binning.spv");
         let bin_pipeline = device.create_simple_compute_pipeline(bin_code, 4, 0)?;
         let bin_ds = device.create_descriptor_set(
@@ -196,12 +204,10 @@ impl<D: Device> Renderer<D> {
         let coarse_alloc_buf_dev = device.create_buffer(8, dev)?;
 
         let coarse_alloc_start = WIDTH_IN_TILES * HEIGHT_IN_TILES * PTCL_INITIAL_ALLOC;
-        device
-            .write_buffer(&coarse_alloc_buf_host, &[
-                n_elements as u32,
-                coarse_alloc_start as u32,
-            ])
-            ?;
+        device.write_buffer(
+            &coarse_alloc_buf_host,
+            &[n_elements as u32, coarse_alloc_start as u32],
+        )?;
         let coarse_code = include_bytes!("../shader/coarse.spv");
         let coarse_pipeline = device.create_simple_compute_pipeline(coarse_code, 4, 0)?;
         let coarse_ds = device.create_descriptor_set(
@@ -212,11 +218,7 @@ impl<D: Device> Renderer<D> {
 
         let k4_code = include_bytes!("../shader/kernel4.spv");
         let k4_pipeline = device.create_simple_compute_pipeline(k4_code, 1, 1)?;
-        let k4_ds = device.create_descriptor_set(
-            &k4_pipeline,
-            &[&ptcl_buf],
-            &[&image_dev],
-        )?;
+        let k4_ds = device.create_descriptor_set(&k4_pipeline, &[&ptcl_buf], &[&image_dev])?;
 
         Ok(Renderer {
             scene_buf,

piet-gpu/src/pico_svg.rs

@@ -29,6 +29,7 @@ pub struct FillItem {
 }
 
 struct Parser<'a> {
+    scale: f64,
     items: &'a mut Vec<Item>,
 }
 
@@ -37,7 +38,7 @@ impl PicoSvg {
         let doc = Document::parse(xml_string)?;
         let root = doc.root_element();
         let mut items = Vec::new();
-        let mut parser = Parser::new(&mut items);
+        let mut parser = Parser::new(&mut items, scale);
         for node in root.children() {
             parser.rec_parse(node)?;
         }
@@ -60,13 +61,16 @@ impl PicoSvg {
 }
 
 impl<'a> Parser<'a> {
-    fn new(items: &'a mut Vec<Item>) -> Parser<'a> {
-        Parser {
-            items
-        }
+    fn new(items: &'a mut Vec<Item>, scale: f64) -> Parser<'a> {
+        Parser { scale, items }
     }
 
     fn rec_parse(&mut self, node: Node) -> Result<(), Box<dyn std::error::Error>> {
+        let transform = if self.scale >= 0.0 {
+            Affine::scale(self.scale)
+        } else {
+            Affine::new([-self.scale, 0.0, 0.0, self.scale, 0.0, 1536.0])
+        };
         if node.is_element() {
             match node.tag_name().name() {
                 "g" => {
@@ -77,21 +81,28 @@ impl<'a> Parser<'a> {
                 "path" => {
                     let d = node.attribute("d").ok_or("missing 'd' attribute")?;
                     let bp = BezPath::from_svg(d)?;
-                    let path = Affine::new([1.5, 0.0, 0.0, -1.5, 0.0, 1500.0]) * bp;
+                    let path = transform * bp;
                     // TODO: default fill color is black, but this is overridden in tiger to this logic.
                     if let Some(fill_color) = node.attribute("fill") {
                         if fill_color != "none" {
                             let color = parse_color(fill_color);
                             let color = modify_opacity(color, "fill-opacity", node);
-                            self.items.push(Item::Fill(FillItem { color, path: path.clone() }));
+                            self.items.push(Item::Fill(FillItem {
+                                color,
+                                path: path.clone(),
+                            }));
                         }
                     }
                     if let Some(stroke_color) = node.attribute("stroke") {
                         if stroke_color != "none" {
-                            let width = 1.5 * f64::from_str(node.attribute("stroke-width").ok_or("missing width")?)?;
+                            let width = self.scale.abs()
+                                * f64::from_str(
+                                    node.attribute("stroke-width").ok_or("missing width")?,
+                                )?;
                             let color = parse_color(stroke_color);
                             let color = modify_opacity(color, "stroke-opacity", node);
-                            self.items.push(Item::Stroke(StrokeItem { width, color, path }));
+                            self.items
+                                .push(Item::Stroke(StrokeItem { width, color, path }));
                         }
                     }
                 }