use std::str::FromStr;
use std::path::PathBuf;
use clap::{Arg, App};
use visioncortex::PathSimplifyMode;
pub enum Preset {
Bw,
Poster,
Photo
}
pub enum ColorMode {
Color,
Binary,
}
pub enum Hierarchical {
Stacked,
Cutout,
}
pub struct Config {
pub input_path: PathBuf,
pub output_path: PathBuf,
pub color_mode: ColorMode,
pub hierarchical: Hierarchical,
pub filter_speckle: usize,
pub color_precision: i32,
pub layer_difference: i32,
pub mode: PathSimplifyMode,
pub corner_threshold: i32,
pub length_threshold: f64,
pub max_iterations: usize,
pub splice_threshold: i32,
pub path_precision: Option<u32>,
}
pub(crate) struct ConverterConfig {
pub input_path: PathBuf,
pub output_path: PathBuf,
pub color_mode: ColorMode,
pub hierarchical: Hierarchical,
pub filter_speckle_area: usize,
pub color_precision_loss: i32,
pub layer_difference: i32,
pub mode: PathSimplifyMode,
pub corner_threshold: f64,
pub length_threshold: f64,
pub max_iterations: usize,
pub splice_threshold: f64,
pub path_precision: Option<u32>,
}
impl Default for Config {
fn default() -> Self {
Self {
input_path: PathBuf::default(),
output_path: PathBuf::default(),
color_mode: ColorMode::Color,
hierarchical: Hierarchical::Stacked,
mode: PathSimplifyMode::Spline,
filter_speckle: 4,
color_precision: 6,
layer_difference: 16,
corner_threshold: 60,
length_threshold: 4.0,
splice_threshold: 45,
max_iterations: 10,
path_precision: Some(8),
}
}
}
impl FromStr for ColorMode {
type Err = String;
fn from_str(s: &str) -> Result<Self, Self::Err> {
match s {
"color" => Ok(Self::Color),
"binary" => Ok(Self::Binary),
_ => Err(format!("unknown ColorMode {}", s)),
}
}
}
impl FromStr for Hierarchical {
type Err = String;
fn from_str(s: &str) -> Result<Self, Self::Err> {
match s {
"stacked" => Ok(Self::Stacked),
"cutout" => Ok(Self::Cutout),
_ => Err(format!("unknown Hierarchical {}", s)),
}
}
}
impl FromStr for Preset {
type Err = String;
fn from_str(s: &str) -> Result<Self, Self::Err> {
match s {
"bw" => Ok(Self::Bw),
"poster" => Ok(Self::Poster),
"photo" => Ok(Self::Photo),
_ => Err(format!("unknown Preset {}", s)),
}
}
}
fn path_simplify_mode_from_str(s: &str) -> PathSimplifyMode {
match s {
"polygon" => PathSimplifyMode::Polygon,
"spline" => PathSimplifyMode::Spline,
"none" => PathSimplifyMode::None,
_ => panic!("unknown PathSimplifyMode {}", s),
}
}
impl Config {
pub fn from_args() -> Self {
let app = App::new("visioncortex VTracer ".to_owned() + env!("CARGO_PKG_VERSION"))
.about("A cmd app to convert images into vector graphics.");
let app = app.arg(Arg::with_name("input")
.long("input")
.short("i")
.takes_value(true)
.help("Path to input raster image")
.required(true));
let app = app.arg(Arg::with_name("output")
.long("output")
.short("o")
.takes_value(true)
.help("Path to output vector graphics")
.required(true));
let app = app.arg(Arg::with_name("color_mode")
.long("colormode")
.takes_value(true)
.help("True color image `color` (default) or Binary image `bw`"));
let app = app.arg(Arg::with_name("hierarchical")
.long("hierarchical")
.takes_value(true)
.help(
"Hierarchical clustering `stacked` (default) or non-stacked `cutout`. \
Only applies to color mode. "
));
let app = app.arg(Arg::with_name("preset")
.long("preset")
.takes_value(true)
.help("Use one of the preset configs `bw`, `poster`, `photo`"));
let app = app.arg(Arg::with_name("filter_speckle")
.long("filter_speckle")
.short("f")
.takes_value(true)
.help("Discard patches smaller than X px in size"));
let app = app.arg(Arg::with_name("color_precision")
.long("color_precision")
.short("p")
.takes_value(true)
.help("Number of significant bits to use in an RGB channel"));
let app = app.arg(Arg::with_name("gradient_step")
.long("gradient_step")
.short("g")
.takes_value(true)
.help("Color difference between gradient layers"));
let app = app.arg(Arg::with_name("corner_threshold")
.long("corner_threshold")
.short("c")
.takes_value(true)
.help("Minimum momentary angle (degree) to be considered a corner"));
let app = app.arg(Arg::with_name("segment_length")
.long("segment_length")
.short("l")
.takes_value(true)
.help("Perform iterative subdivide smooth until all segments are shorter than this length"));
let app = app.arg(Arg::with_name("splice_threshold")
.long("splice_threshold")
.short("s")
.takes_value(true)
.help("Minimum angle displacement (degree) to splice a spline"));
let app = app.arg(Arg::with_name("mode")
.long("mode")
.short("m")
.takes_value(true)
.help("Curver fitting mode `pixel`, `polygon`, `spline`"));
let app = app.arg(Arg::with_name("path_precision")
.long("path_precision")
.takes_value(true)
.help("Number of decimal places to use in path string"));
let matches = app.get_matches();
let mut config = Config::default();
let input_path = matches.value_of("input").expect("Input path is required, please specify it by --input or -i.");
let output_path = matches.value_of("output").expect("Output path is required, please specify it by --output or -o.");
if let Some(value) = matches.value_of("preset") {
config = Self::from_preset(Preset::from_str(value).unwrap(), input_path, output_path);
}
config.input_path = PathBuf::from(input_path);
config.output_path = PathBuf::from(output_path);
if let Some(value) = matches.value_of("color_mode") {
config.color_mode = ColorMode::from_str(if value.trim() == "bw" || value.trim() == "BW" {"binary"} else {"color"}).unwrap()
}
if let Some(value) = matches.value_of("hierarchical") {
config.hierarchical = Hierarchical::from_str(value).unwrap()
}
if let Some(value) = matches.value_of("mode") {
let value = value.trim();
config.mode = path_simplify_mode_from_str(if value == "pixel" {
"none"
} else if value == "polygon" {
"polygon"
} else if value == "spline" {
"spline"
} else {
panic!("Parser Error: Curve fitting mode is invalid: {}", value);
});
}
if let Some(value) = matches.value_of("filter_speckle") {
if value.trim().parse::<usize>().is_ok() { let value = value.trim().parse::<usize>().unwrap();
if value > 16 {
panic!("Out of Range Error: Filter speckle is invalid at {}. It must be within [0,16].", value);
}
config.filter_speckle = value;
} else {
panic!("Parser Error: Filter speckle is not a positive integer: {}.", value);
}
}
if let Some(value) = matches.value_of("color_precision") {
if value.trim().parse::<i32>().is_ok() { let value = value.trim().parse::<i32>().unwrap();
if value < 1 || value > 8 {
panic!("Out of Range Error: Color precision is invalid at {}. It must be within [1,8].", value);
}
config.color_precision = value;
} else {
panic!("Parser Error: Color precision is not an integer: {}.", value);
}
}
if let Some(value) = matches.value_of("gradient_step") {
if value.trim().parse::<i32>().is_ok() { let value = value.trim().parse::<i32>().unwrap();
if value < 0 || value > 255 {
panic!("Out of Range Error: Gradient step is invalid at {}. It must be within [0,255].", value);
}
config.layer_difference = value;
} else {
panic!("Parser Error: Gradient step is not an integer: {}.", value);
}
}
if let Some(value) = matches.value_of("corner_threshold") {
if value.trim().parse::<i32>().is_ok() { let value = value.trim().parse::<i32>().unwrap();
if value < 0 || value > 180 {
panic!("Out of Range Error: Corner threshold is invalid at {}. It must be within [0,180].", value);
}
config.corner_threshold = value
} else {
panic!("Parser Error: Corner threshold is not numeric: {}.", value);
}
}
if let Some(value) = matches.value_of("segment_length") {
if value.trim().parse::<f64>().is_ok() { let value = value.trim().parse::<f64>().unwrap();
if value < 3.5 || value > 10.0 {
panic!("Out of Range Error: Segment length is invalid at {}. It must be within [3.5,10].", value);
}
config.length_threshold = value;
} else {
panic!("Parser Error: Segment length is not numeric: {}.", value);
}
}
if let Some(value) = matches.value_of("splice_threshold") {
if value.trim().parse::<i32>().is_ok() { let value = value.trim().parse::<i32>().unwrap();
if value < 0 || value > 180 {
panic!("Out of Range Error: Segment length is invalid at {}. It must be within [0,180].", value);
}
config.splice_threshold = value;
} else {
panic!("Parser Error: Segment length is not numeric: {}.", value);
}
}
if let Some(value) = matches.value_of("path_precision") {
if value.trim().parse::<u32>().is_ok() { let value = value.trim().parse::<u32>().ok();
config.path_precision = value;
} else {
panic!("Parser Error: Path precision is not an unsigned integer: {}.", value);
}
}
config
}
pub fn from_preset(preset: Preset, input_path: &str, output_path: &str) -> Self {
let input_path = PathBuf::from(input_path);
let output_path = PathBuf::from(output_path);
match preset {
Preset::Bw => Self {
input_path,
output_path,
color_mode: ColorMode::Binary,
hierarchical: Hierarchical::Stacked,
filter_speckle: 4,
color_precision: 6,
layer_difference: 16,
mode: PathSimplifyMode::Spline,
corner_threshold: 60,
length_threshold: 4.0,
max_iterations: 10,
splice_threshold: 45,
path_precision: Some(8),
},
Preset::Poster => Self {
input_path,
output_path,
color_mode: ColorMode::Color,
hierarchical: Hierarchical::Stacked,
filter_speckle: 4,
color_precision: 8,
layer_difference: 16,
mode: PathSimplifyMode::Spline,
corner_threshold: 60,
length_threshold: 4.0,
max_iterations: 10,
splice_threshold: 45,
path_precision: Some(8),
},
Preset::Photo => Self {
input_path,
output_path,
color_mode: ColorMode::Color,
hierarchical: Hierarchical::Stacked,
filter_speckle: 10,
color_precision: 8,
layer_difference: 48,
mode: PathSimplifyMode::Spline,
corner_threshold: 180,
length_threshold: 4.0,
max_iterations: 10,
splice_threshold: 45,
path_precision: Some(8),
}
}
}
pub(crate) fn into_converter_config(self) -> ConverterConfig {
ConverterConfig {
input_path: self.input_path,
output_path: self.output_path,
color_mode: self.color_mode,
hierarchical: self.hierarchical,
filter_speckle_area: self.filter_speckle * self.filter_speckle,
color_precision_loss: 8 - self.color_precision,
layer_difference: self.layer_difference,
mode: self.mode,
corner_threshold: deg2rad(self.corner_threshold),
length_threshold: self.length_threshold,
max_iterations: self.max_iterations,
splice_threshold: deg2rad(self.splice_threshold),
path_precision: self.path_precision,
}
}
}
fn deg2rad(deg: i32) -> f64 {
deg as f64 / 180.0 * std::f64::consts::PI
}