#![doc(html_root_url = "https://docs.rs/svgfilters/0.2.0")]
#![no_std]
#![forbid(unsafe_code)]
#![warn(missing_docs)]
#![allow(clippy::many_single_char_names)]
#![allow(clippy::too_many_arguments)]
extern crate alloc;
use float_cmp::ApproxEqUlps;
pub use rgb::{RGB8, RGBA8};
mod box_blur;
mod color_matrix;
mod component_transfer;
mod composite;
mod convolve_matrix;
mod displacement_map;
mod iir_blur;
mod lighting;
mod morphology;
mod turbulence;
pub use box_blur::box_blur;
pub use color_matrix::{ColorMatrix, color_matrix};
pub use component_transfer::{TransferFunction, component_transfer};
pub use composite::arithmetic_composite;
pub use convolve_matrix::{ConvolveMatrix, EdgeMode, convolve_matrix};
pub use displacement_map::{ColorChannel, displacement_map};
pub use iir_blur::iir_blur;
pub use lighting::{LightSource, diffuse_lighting, specular_lighting};
pub use morphology::{MorphologyOperator, morphology};
pub use turbulence::turbulence;
#[derive(Clone, Copy)]
pub struct ImageRef<'a> {
data: &'a [RGBA8],
width: u32,
height: u32,
}
impl<'a> ImageRef<'a> {
#[inline]
pub fn new(data: &'a [RGBA8], width: u32, height: u32) -> Self {
ImageRef { data, width, height }
}
#[inline]
fn alpha_at(&self, x: u32, y: u32) -> i16 {
self.data[(self.width * y + x) as usize].a as i16
}
}
pub struct ImageRefMut<'a> {
data: &'a mut [RGBA8],
width: u32,
height: u32,
}
impl<'a> ImageRefMut<'a> {
#[inline]
pub fn new(data: &'a mut [RGBA8], width: u32, height: u32) -> Self {
ImageRefMut { data, width, height }
}
#[inline]
fn pixel_at(&self, x: u32, y: u32) -> RGBA8 {
self.data[(self.width * y + x) as usize]
}
#[inline]
fn pixel_at_mut(&mut self, x: u32, y: u32) -> &mut RGBA8 {
&mut self.data[(self.width * y + x) as usize]
}
}
pub fn multiply_alpha(data: &mut [RGBA8]) {
for p in data {
let a = p.a as f64 / 255.0;
p.b = (p.b as f64 * a + 0.5) as u8;
p.g = (p.g as f64 * a + 0.5) as u8;
p.r = (p.r as f64 * a + 0.5) as u8;
}
}
pub fn demultiply_alpha(data: &mut [RGBA8]) {
for p in data {
let a = p.a as f64 / 255.0;
p.b = (p.b as f64 / a + 0.5) as u8;
p.g = (p.g as f64 / a + 0.5) as u8;
p.r = (p.r as f64 / a + 0.5) as u8;
}
}
const SRGB_TO_LINEAR_RGB_TABLE: &[u8; 256] = &[
0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3,
4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7,
8, 8, 8, 8, 9, 9, 9, 10, 10, 10, 11, 11, 12, 12, 12, 13,
13, 13, 14, 14, 15, 15, 16, 16, 17, 17, 17, 18, 18, 19, 19, 20,
20, 21, 22, 22, 23, 23, 24, 24, 25, 25, 26, 27, 27, 28, 29, 29,
30, 30, 31, 32, 32, 33, 34, 35, 35, 36, 37, 37, 38, 39, 40, 41,
41, 42, 43, 44, 45, 45, 46, 47, 48, 49, 50, 51, 51, 52, 53, 54,
55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70,
71, 72, 73, 74, 76, 77, 78, 79, 80, 81, 82, 84, 85, 86, 87, 88,
90, 91, 92, 93, 95, 96, 97, 99, 100, 101, 103, 104, 105, 107, 108, 109,
111, 112, 114, 115, 116, 118, 119, 121, 122, 124, 125, 127, 128, 130, 131, 133,
134, 136, 138, 139, 141, 142, 144, 146, 147, 149, 151, 152, 154, 156, 157, 159,
161, 163, 164, 166, 168, 170, 171, 173, 175, 177, 179, 181, 183, 184, 186, 188,
190, 192, 194, 196, 198, 200, 202, 204, 206, 208, 210, 212, 214, 216, 218, 220,
222, 224, 226, 229, 231, 233, 235, 237, 239, 242, 244, 246, 248, 250, 253, 255,
];
const LINEAR_RGB_TO_SRGB_TABLE: &[u8; 256] = &[
0, 13, 22, 28, 34, 38, 42, 46, 50, 53, 56, 59, 61, 64, 66, 69,
71, 73, 75, 77, 79, 81, 83, 85, 86, 88, 90, 92, 93, 95, 96, 98,
99, 101, 102, 104, 105, 106, 108, 109, 110, 112, 113, 114, 115, 117, 118, 119,
120, 121, 122, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136,
137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 148, 149, 150, 151,
152, 153, 154, 155, 155, 156, 157, 158, 159, 159, 160, 161, 162, 163, 163, 164,
165, 166, 167, 167, 168, 169, 170, 170, 171, 172, 173, 173, 174, 175, 175, 176,
177, 178, 178, 179, 180, 180, 181, 182, 182, 183, 184, 185, 185, 186, 187, 187,
188, 189, 189, 190, 190, 191, 192, 192, 193, 194, 194, 195, 196, 196, 197, 197,
198, 199, 199, 200, 200, 201, 202, 202, 203, 203, 204, 205, 205, 206, 206, 207,
208, 208, 209, 209, 210, 210, 211, 212, 212, 213, 213, 214, 214, 215, 215, 216,
216, 217, 218, 218, 219, 219, 220, 220, 221, 221, 222, 222, 223, 223, 224, 224,
225, 226, 226, 227, 227, 228, 228, 229, 229, 230, 230, 231, 231, 232, 232, 233,
233, 234, 234, 235, 235, 236, 236, 237, 237, 238, 238, 238, 239, 239, 240, 240,
241, 241, 242, 242, 243, 243, 244, 244, 245, 245, 246, 246, 246, 247, 247, 248,
248, 249, 249, 250, 250, 251, 251, 251, 252, 252, 253, 253, 254, 254, 255, 255,
];
pub fn into_linear_rgb(data: &mut [RGBA8]) {
for p in data {
p.r = SRGB_TO_LINEAR_RGB_TABLE[p.r as usize];
p.g = SRGB_TO_LINEAR_RGB_TABLE[p.g as usize];
p.b = SRGB_TO_LINEAR_RGB_TABLE[p.b as usize];
}
}
pub fn from_linear_rgb(data: &mut [RGBA8]) {
for p in data {
p.r = LINEAR_RGB_TO_SRGB_TABLE[p.r as usize];
p.g = LINEAR_RGB_TO_SRGB_TABLE[p.g as usize];
p.b = LINEAR_RGB_TO_SRGB_TABLE[p.b as usize];
}
}
#[inline]
fn f64_bound(min: f64, val: f64, max: f64) -> f64 {
debug_assert!(min.is_finite());
debug_assert!(val.is_finite());
debug_assert!(max.is_finite());
if val > max {
max
} else if val < min {
min
} else {
val
}
}
trait FuzzyEq<Rhs: ?Sized = Self> {
fn fuzzy_eq(&self, other: &Rhs) -> bool;
#[inline]
fn fuzzy_ne(&self, other: &Rhs) -> bool {
!self.fuzzy_eq(other)
}
}
trait FuzzyZero: FuzzyEq {
fn is_fuzzy_zero(&self) -> bool;
}
impl FuzzyEq for f64 {
#[inline]
fn fuzzy_eq(&self, other: &f64) -> bool {
self.approx_eq_ulps(other, 4)
}
}
impl FuzzyZero for f64 {
#[inline]
fn is_fuzzy_zero(&self) -> bool {
self.fuzzy_eq(&0.0)
}
}