From ac24b67300bcb86ba473e73031bdc9e0d45d7853 Mon Sep 17 00:00:00 2001
From: Patrick Walton <pcwalton@mimiga.net>
Date: Mon, 25 Feb 2019 15:06:33 -0800
Subject: [PATCH] Add a simple SVG-subset-to-Skia-code tool, for benchmarking

---
 Cargo.lock                    |  7 +++
 Cargo.toml                    |  1 +
 utils/svg-to-skia/Cargo.toml  |  8 ++++
 utils/svg-to-skia/src/main.rs | 87 +++++++++++++++++++++++++++++++++++
 4 files changed, 103 insertions(+)
 create mode 100644 utils/svg-to-skia/Cargo.toml
 create mode 100644 utils/svg-to-skia/src/main.rs

diff --git a/Cargo.lock b/Cargo.lock
index 0406dd67..2e6db887 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -946,6 +946,13 @@ name = "strsim"
 version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "svg-to-skia"
+version = "0.1.0"
+dependencies = [
+ "usvg 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "svgdom"
 version = "0.15.0"
diff --git a/Cargo.toml b/Cargo.toml
index 514127ed..7754f329 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,4 +10,5 @@ members = [
     "utils/area-lut",
     "utils/gamma-lut",
     "utils/tile-svg",
+    "utils/svg-to-skia"
 ]
diff --git a/utils/svg-to-skia/Cargo.toml b/utils/svg-to-skia/Cargo.toml
new file mode 100644
index 00000000..a3a57cb4
--- /dev/null
+++ b/utils/svg-to-skia/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "svg-to-skia"
+version = "0.1.0"
+authors = ["Patrick Walton <pcwalton@mimiga.net>"]
+edition = "2018"
+
+[dependencies]
+usvg = "0.4"
diff --git a/utils/svg-to-skia/src/main.rs b/utils/svg-to-skia/src/main.rs
new file mode 100644
index 00000000..88f5b503
--- /dev/null
+++ b/utils/svg-to-skia/src/main.rs
@@ -0,0 +1,87 @@
+// pathfinder/utils/svg-to-skia/src/main.rs
+//
+// Copyright © 2019 The Pathfinder Project Developers.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use std::env;
+use usvg::{Node, NodeKind, Options, Paint, PathSegment, Tree};
+
+fn main() {
+    let input_path = env::args().skip(1).next().unwrap();
+    let tree = Tree::from_file(&input_path, &Options::default()).unwrap();
+
+    println!("#ifndef PAINT_H");
+    println!("#define PAINT_H");
+    println!("static void paint(SkCanvas *canvas) {{");
+    println!("    SkPaint paint;");
+    println!("    SkPath path;");
+    println!("    paint.setAntiAlias(true);");
+    println!("    canvas->clear(SK_ColorWHITE);");
+
+    let root = &tree.root();
+    match *root.borrow() {
+        NodeKind::Svg(_) => {
+            for kid in root.children() {
+                process_node(&kid);
+            }
+        }
+        _ => unreachable!(),
+    }
+
+    println!("}}");
+    println!("#endif");
+}
+
+fn process_node(node: &Node) {
+    match *node.borrow() {
+        NodeKind::Group(_) => {
+            for kid in node.children() {
+                process_node(&kid)
+            }
+        }
+        NodeKind::Path(ref path) => {
+            for segment in path.segments.iter() {
+                match segment {
+                    PathSegment::MoveTo { x, y } => println!("    path.moveTo({}, {});", x, y),
+                    PathSegment::LineTo { x, y } => println!("    path.lineTo({}, {});", x, y),
+                    PathSegment::CurveTo { x1, y1, x2, y2, x, y } => {
+                        println!("    path.cubicTo({}, {}, {}, {}, {}, {});",
+                                 x1, y1, x2, y2, x, y);
+                    }
+                    PathSegment::ClosePath => println!("    path.close();"),
+                }
+            }
+
+            if let Some(ref fill) = path.fill {
+                set_color(&fill.paint);
+                println!("    paint.setStyle(SkPaint::kFill_Style);");
+                println!("    canvas->drawPath(path, paint);");
+            }
+
+            if let Some(ref stroke) = path.stroke {
+                set_color(&stroke.paint);
+                println!("    paint.setStrokeWidth({});", stroke.width.value());
+                println!("    paint.setStyle(SkPaint::kStroke_Style);");
+                println!("    canvas->drawPath(path, paint);");
+            }
+
+            println!("    path.reset();");
+        }
+        _ => {}
+    }
+}
+
+fn set_color(paint: &Paint) {
+    if let Paint::Color(color) = *paint {
+        println!("    paint.setColor(0x{:x});",
+                ((color.red as u32) << 16) |
+                    ((color.green as u32) << 8) |
+                    ((color.blue as u32) << 0) |
+                    (0xff << 24));
+    }
+}