Initial rudimentary Lottie parsing code
This commit is contained in:
Patrick Walton
parent
cd23d62f3d
commit
8c4f05ce39
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@ -957,6 +957,13 @@ dependencies = [
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"cfg-if 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "lottie_basic"
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version = "0.1.0"
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dependencies = [
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"pathfinder_lottie 0.1.0",
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]
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[[package]]
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name = "lyon_geom"
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version = "0.12.4"
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@ -1256,6 +1263,14 @@ dependencies = [
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"rustache 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "pathfinder_lottie"
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version = "0.1.0"
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dependencies = [
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"serde 1.0.91 (registry+https://github.com/rust-lang/crates.io-index)",
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"serde_json 1.0.39 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "pathfinder_magicleap_demo"
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version = "0.1.0"
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@ -1753,6 +1768,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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name = "serde"
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version = "1.0.91"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"serde_derive 1.0.91 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "serde_derive"
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@ -8,9 +8,11 @@ members = [
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"examples/canvas_minimal",
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"examples/canvas_moire",
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"examples/canvas_text",
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"examples/lottie_basic",
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"geometry",
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"gl",
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"gpu",
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"lottie",
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"renderer",
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"simd",
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"svg",
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@ -0,0 +1,10 @@
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[package]
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name = "lottie_basic"
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version = "0.1.0"
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authors = ["Patrick Walton <pcwalton@mimiga.net>"]
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edition = "2018"
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[dependencies]
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[dependencies.pathfinder_lottie]
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path = "../../lottie"
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@ -0,0 +1,23 @@
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// pathfinder/examples/lottie_basic/src/main.rs
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//
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// Copyright © 2019 The Pathfinder Project Developers.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! Experimental example for reading Lottie animations. This is very incomplete.
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use pathfinder_lottie::Lottie;
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use std::env;
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use std::fs::File;
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use std::io::BufReader;
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fn main() {
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let path = env::args().skip(1).next().unwrap();
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let file = BufReader::new(File::open(path).unwrap());
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let lottie = Lottie::from_reader(file).unwrap();
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println!("{:#?}", lottie);
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}
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@ -0,0 +1,12 @@
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[package]
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name = "pathfinder_lottie"
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version = "0.1.0"
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authors = ["Patrick Walton <pcwalton@mimiga.net>"]
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edition = "2018"
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[dependencies]
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serde_json = "1.0"
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[dependencies.serde]
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version = "1.0"
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features = ["derive"]
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@ -0,0 +1,313 @@
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// pathfinder/lottie/src/lib.rs
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//
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// Copyright © 2019 The Pathfinder Project Developers.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! Experimental support for Lottie. This is very incomplete.
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use serde::{Deserialize, Serialize};
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use serde_json::Error as JSONError;
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use std::io::Read;
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#[derive(Clone, Debug, Serialize, Deserialize)]
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pub struct Lottie {
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#[serde(rename = "v")]
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pub version: String,
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#[serde(rename = "fr")]
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pub frame_rate: i64,
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#[serde(rename = "ip")]
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pub in_point: i64,
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#[serde(rename = "op")]
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pub out_point: i64,
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#[serde(rename = "w")]
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pub width: f64,
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#[serde(rename = "h")]
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pub height: f64,
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#[serde(rename = "ddd")]
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pub three_d: i64,
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pub assets: Vec<Asset>,
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pub layers: Vec<Layer>,
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}
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#[derive(Clone, Debug, Serialize, Deserialize)]
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pub struct Asset {}
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// FIXME(pcwalton): Using an untagged enum is a botch here. There actually is a tag: it's just an
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// integer, which `serde_json` doesn't support natively.
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#[derive(Clone, Debug, Serialize, Deserialize)]
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#[serde(untagged)]
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pub enum Layer {
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Shape {
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#[serde(rename = "ddd")]
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three_d: i64,
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#[serde(rename = "ind")]
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index: i64,
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#[serde(rename = "nm")]
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name: String,
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#[serde(rename = "ks")]
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transform: Transform,
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#[serde(rename = "ao")]
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auto_orient: i64,
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#[serde(rename = "ip")]
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in_point: i64,
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#[serde(rename = "op")]
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out_point: i64,
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#[serde(rename = "st")]
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start_time: i64,
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#[serde(rename = "bm")]
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blend_mode: i64,
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#[serde(rename = "sr")]
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stretch: i64,
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#[serde(rename = "ln")]
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#[serde(default)]
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layer_id: Option<String>,
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shapes: Vec<Shape>,
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},
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}
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#[derive(Clone, Debug, Serialize, Deserialize)]
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pub struct Transform {
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#[serde(rename = "p")]
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pub position: MultidimensionalPropertyValue,
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#[serde(rename = "a")]
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pub anchor_point: MultidimensionalPropertyValue,
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#[serde(rename = "s")]
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pub scale: MultidimensionalPropertyValue,
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#[serde(rename = "r")]
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pub rotation: PropertyValue,
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#[serde(rename = "o")]
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#[serde(default)]
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pub opacity: Option<PropertyValue>,
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#[serde(rename = "px")]
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#[serde(default)]
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pub position_x: Option<PropertyValue>,
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#[serde(rename = "py")]
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#[serde(default)]
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pub position_y: Option<PropertyValue>,
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#[serde(rename = "pz")]
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#[serde(default)]
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pub position_z: Option<PropertyValue>,
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#[serde(rename = "sk")]
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#[serde(default)]
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pub skew: Option<PropertyValue>,
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#[serde(rename = "sa")]
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#[serde(default)]
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pub skew_axis: Option<PropertyValue>,
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}
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#[derive(Clone, Debug, Serialize, Deserialize)]
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#[serde(untagged)]
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pub enum PropertyValue {
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Value {
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#[serde(rename = "k")]
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value: f32,
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#[serde(rename = "x")]
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#[serde(default)]
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expression: Option<String>,
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#[serde(rename = "ix")]
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#[serde(default)]
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index: Option<i64>,
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},
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KeyframedValue {
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#[serde(rename = "k")]
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keyframes: Vec<KeyframeValue>,
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#[serde(rename = "x")]
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#[serde(default)]
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expression: Option<String>,
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#[serde(rename = "ix")]
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#[serde(default)]
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index: Option<i64>,
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},
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}
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#[derive(Clone, Debug, Serialize, Deserialize)]
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pub struct KeyframeValue {
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#[serde(rename = "s")]
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#[serde(default)]
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pub start: Option<Vec<f32>>,
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#[serde(rename = "t")]
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pub time: i64,
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#[serde(rename = "i")]
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#[serde(default)]
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pub interpolation: Option<OffsetInterpolation>,
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}
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#[derive(Clone, Copy, Debug, Serialize, Deserialize)]
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pub struct Interpolation {
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pub x: f32,
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pub y: f32,
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}
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#[derive(Clone, Debug, Serialize, Deserialize)]
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pub struct OffsetInterpolation {
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pub x: Vec<f32>,
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pub y: Vec<f32>,
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}
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#[derive(Clone, Debug, Serialize, Deserialize)]
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pub struct OffsetKeyframe {
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#[serde(rename = "s")]
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#[serde(default)]
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pub start: Option<Vec<f32>>,
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#[serde(rename = "t")]
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pub time: i64,
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#[serde(rename = "i")]
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#[serde(default)]
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pub in_value: Option<OffsetInterpolation>,
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#[serde(rename = "o")]
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#[serde(default)]
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pub out_value: Option<OffsetInterpolation>,
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}
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#[derive(Clone, Debug, Serialize, Deserialize)]
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#[serde(untagged)]
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pub enum MultidimensionalPropertyValue {
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Value {
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#[serde(rename = "k")]
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value: Vec<f32>,
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#[serde(rename = "x")]
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#[serde(default)]
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expression: Option<String>,
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#[serde(rename = "ix")]
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#[serde(default)]
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index: Option<i64>,
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},
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KeyframedValue {
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#[serde(rename = "k")]
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keyframes: Vec<OffsetKeyframe>,
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#[serde(rename = "x")]
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#[serde(default)]
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expression: Option<String>,
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#[serde(rename = "ix")]
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#[serde(default)]
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index: Option<i64>,
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#[serde(rename = "ti")]
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#[serde(default)]
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in_tangent: Option<i64>,
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#[serde(rename = "to")]
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#[serde(default)]
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out_tangent: Option<i64>,
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},
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}
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#[derive(Clone, Debug, Serialize, Deserialize)]
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#[serde(tag = "ty")]
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pub enum Shape {
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#[serde(rename = "gr")]
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Group {
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#[serde(rename = "it")]
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items: Vec<Shape>,
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#[serde(rename = "nm")]
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name: String,
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},
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#[serde(rename = "sh")]
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Shape {
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#[serde(rename = "ks")]
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vertices: ShapeVertices,
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#[serde(rename = "d")]
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#[serde(default)]
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direction: Option<i64>,
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},
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#[serde(rename = "fl")]
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Fill {
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#[serde(rename = "nm")]
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#[serde(default)]
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name: Option<String>,
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#[serde(rename = "o")]
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#[serde(default)]
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opacity: Option<PropertyValue>,
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#[serde(rename = "c")]
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color: MultidimensionalPropertyValue,
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},
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#[serde(rename = "tr")]
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Transform {
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#[serde(rename = "r")]
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rotation: PropertyValue,
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#[serde(rename = "sk")]
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skew: PropertyValue,
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#[serde(rename = "sa")]
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skew_axis: PropertyValue,
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#[serde(rename = "p")]
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position: MultidimensionalPropertyValue,
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#[serde(rename = "a")]
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anchor_point: MultidimensionalPropertyValue,
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#[serde(rename = "s")]
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scale: MultidimensionalPropertyValue,
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},
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#[serde(other)]
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Unimplemented,
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}
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#[derive(Clone, Debug, Serialize, Deserialize)]
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#[serde(untagged)]
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pub enum ShapeVertices {
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Shape {
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#[serde(rename = "k")]
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value: ShapeProperty,
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#[serde(rename = "x")]
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#[serde(default)]
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expression: Option<String>,
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#[serde(rename = "ix")]
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#[serde(default)]
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index: Option<i64>,
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#[serde(rename = "a")]
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animated: i64,
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},
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ShapeKeyframed {
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#[serde(rename = "k")]
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value: Vec<ShapeKeyframeProperty>,
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#[serde(rename = "x")]
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#[serde(default)]
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expression: Option<String>,
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#[serde(rename = "ix")]
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#[serde(default)]
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index: Option<i64>,
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#[serde(rename = "a")]
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animated: i64,
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#[serde(rename = "ti")]
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#[serde(default)]
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in_tangent: Vec<i64>,
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#[serde(rename = "to")]
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#[serde(default)]
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out_tangent: Vec<i64>,
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},
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}
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#[derive(Clone, Debug, Serialize, Deserialize)]
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pub struct ShapeProperty {
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#[serde(rename = "c")]
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pub closed: bool,
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#[serde(rename = "i")]
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pub in_points: Vec<[f32; 2]>,
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#[serde(rename = "o")]
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pub out_points: Vec<[f32; 2]>,
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#[serde(rename = "v")]
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pub vertices: Vec<[f32; 2]>,
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}
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#[derive(Clone, Debug, Serialize, Deserialize)]
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pub struct ShapeKeyframeProperty {
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#[serde(rename = "s")]
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#[serde(default)]
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pub start: Vec<Option<ShapeProperty>>,
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#[serde(rename = "t")]
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pub time: i64,
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#[serde(rename = "i")]
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#[serde(default)]
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pub in_value: Option<OffsetInterpolation>,
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#[serde(rename = "o")]
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#[serde(default)]
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pub out_value: Option<OffsetInterpolation>,
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}
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impl Lottie {
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#[inline]
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pub fn from_reader<R>(reader: R) -> Result<Lottie, JSONError> where R: Read {
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serde_json::from_reader(reader)
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}
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}
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