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//! Image manipulation effects in HSL, LCh and HSV. extern crate image; extern crate rand; use image::{GenericImageView}; use palette::{Hsl, Lch, Shade, Pixel, Saturate, Srgba, Hue, Hsv}; use crate::{PhotonImage, Rgb, helpers}; extern crate wasm_bindgen; use wasm_bindgen::prelude::*; /// Apply gamma correction. // #[wasm_bindgen] // pub fn gamma_correction(mut photon_image: &mut PhotonImage, red: f32, green: f32, blue: f32) { // let img = helpers::dyn_image_from_raw(&photon_image); // let (width, height) = img.dimensions(); // let mut img = img.to_rgba(); // // Initialize gamma arrays // let mut gammaR: Vec<u8> = vec![]; // let mut gammaG: Vec<u8> = vec![]; // let mut gammaB: Vec<u8> = vec![]; // let MAX_VALUE_INT = 255; // let MAX_VALUE_FLT = 255.0; // let REVERSE = 1.0; // // Set values within gamma arrays // for i in 0..256 { // gammaR[i] = min(MAX_VALUE_INT, ((MAX_VALUE_FLT * ((i as f32 / MAX_VALUE_FLT) as u32).powf(REVERSE / red) + 0.5 ) as u8)); // gammaG[i] = min(MAX_VALUE_INT, ((MAX_VALUE_FLT * ((i as f32 / MAX_VALUE_FLT) as u32).powf(REVERSE / green) + 0.5 ) as u8); // gammaB[i] = min(MAX_VALUE_INT, ((MAX_VALUE_FLT * ((i as f32 / MAX_VALUE_FLT) as u32).powf(REVERSE / blue) + 0.5 ) as u8); // } // for x in 0..width { // for y in 0..height { // let px_data = img.get_pixel(x, y).data; // let r_val = px_data[0]; // let g_val = px_data[1]; // let b_val = px_data[2]; // px_data[0] = gammaR[r_val as usize]; // px_data[1] = gammaG[g_val as usize]; // px_data[2] = gammaB[b_val as usize]; // img.put_pixel(x, y, px); // } // } // photon_image.raw_pixels = img.to_vec(); // } /// Image manipulation effects in the LCh colour space /// /// Effects include: /// * **saturate** - Saturation increase. /// * **desaturate** - Desaturate the image. /// * **shift_hue** - Hue rotation by a specified number of degrees. /// * **darken** - Decrease the brightness. /// * **lighten** - Increase the brightness. /// /// # Arguments /// * `photon_image` - A PhotonImage. /// * `mode` - The effect desired to be applied. Choose from: `saturate`, `desaturate`, `shift_hue`, `darken`, `lighten` /// * `amt` - A float value from 0 to 1 which represents the amount the effect should be increased by. /// # Example /// ``` /// // For example to increase the saturation by 10%: /// use photon::color_spaces::lch; /// /// // Open the image. A PhotonImage is returned. /// let img: PhotonImage = open_image("images/flowers.PNG"); /// /// lch(&mut img, "saturate", 0.1); /// ``` #[wasm_bindgen] pub fn lch(mut photon_image: &mut PhotonImage, mode: &str, amt: f32) { let img = helpers::dyn_image_from_raw(&photon_image); let (width, height) = img.dimensions(); let mut img = img.to_rgba(); for x in 0..width { for y in 0..height { let px_data = img.get_pixel(x, y).data; let lch_colour: Lch = Srgba::from_raw(&px_data) .into_format() .into_linear() .into(); let new_color = match mode { // Match a single value "desaturate" => lch_colour.desaturate(amt), "saturate" => lch_colour.saturate(amt), "lighten" => lch_colour.lighten(amt), "darken" => lch_colour.darken(amt), "shift_hue" => lch_colour.shift_hue(amt * 360.0), _ => lch_colour.saturate(amt), }; img.put_pixel(x, y, image::Rgba { data: Srgba::from_linear(new_color.into()).into_format().into_raw() }); } } photon_image.raw_pixels = img.to_vec(); } /// Image manipulation effects in the HSL colour space. /// /// Effects include: /// * **saturate** - Saturation increase. /// * **desaturate** - Desaturate the image. /// * **shift_hue** - Hue rotation by a specified number of degrees. /// * **darken** - Decrease the brightness. /// * **lighten** - Increase the brightness. /// /// # Arguments /// * `photon_image` - A PhotonImage. /// * `mode` - The effect desired to be applied. Choose from: `saturate`, `desaturate`, `shift_hue`, `darken`, `lighten` /// * `amt` - A float value from 0 to 1 which represents the amount the effect should be increased by. /// # Example /// ``` /// // For example to increase the saturation by 10%: /// use photon::color_spaces::hsl; /// /// // Open the image. A PhotonImage is returned. /// let img: PhotonImage = open_image("images/flowers.PNG"); /// /// hsl(&mut img, "saturate", 0.1); /// ``` #[wasm_bindgen] pub fn hsl(mut photon_image: &mut PhotonImage, mode: &str, amt: f32) { // The function logic is kept separate from other colour spaces for now, // since other HSL-specific logic may be implemented here, which isn't available in other colour spaces let mut img = helpers::dyn_image_from_raw(&photon_image).to_rgba(); let (width, height) = img.dimensions(); for x in 0..width { for y in 0..height { let px_data = img.get_pixel(x, y).data; let colour = Srgba::from_raw(&px_data).into_format(); let hsl_colour = Hsl::from(colour); let new_color = match mode { // Match a single value "desaturate" => hsl_colour.desaturate(amt), "saturate" => hsl_colour.saturate(amt), "lighten" => hsl_colour.lighten(amt), "darken" => hsl_colour.darken(amt), "shift_hue" => hsl_colour.shift_hue(amt * 360.0), _ => hsl_colour.saturate(amt), }; img.put_pixel(x, y, image::Rgba { data: Srgba::from_linear(new_color.into()).into_format().into_raw() }); } } photon_image.raw_pixels = img.to_vec(); } /// Image manipulation in the HSV colour space. /// /// Effects include: /// * **saturate** - Saturation increase. /// * **desaturate** - Desaturate the image. /// * **shift_hue** - Hue rotation by a specified number of degrees. /// * **darken** - Decrease the brightness. /// * **lighten** - Increase the brightness. /// /// # Arguments /// * `photon_image` - A PhotonImage. /// * `mode` - The effect desired to be applied. Choose from: `saturate`, `desaturate`, `shift_hue`, `darken`, `lighten` /// * `amt` - A float value from 0 to 1 which represents the amount the effect should be increased by. /// /// # Example /// ``` /// // For example to increase the saturation by 10%: /// use photon::color_spaces::hsv; /// /// // Open the image. A PhotonImage is returned. /// let img: PhotonImage = open_image("images/flowers.PNG"); /// /// hsv(&mut img, "saturate", 0.1); /// ``` #[wasm_bindgen] pub fn hsv(photon_image: &mut PhotonImage, mode: &str, amt: f32) { let img = helpers::dyn_image_from_raw(&photon_image); let mut img = img.to_rgba(); let (width, height) = img.dimensions(); for x in 0..width { for y in 0..height { let px_data = img.get_pixel(x, y).data; let color = Srgba::from_raw(&px_data).into_format(); let hsv_colour = Hsv::from(color); let new_color = match mode { // Match a single value "desaturate" => hsv_colour.desaturate(amt), "saturate" => hsv_colour.saturate(amt), "lighten" => hsv_colour.lighten(amt), "darken" => hsv_colour.darken(amt), "shift_hue" => hsv_colour.shift_hue(amt * 360.0), _ => hsv_colour.saturate(amt), }; img.put_pixel(x, y, image::Rgba { data: Srgba::from_linear(new_color.into()).into_format().into_raw() }); } } photon_image.raw_pixels = img.to_vec(); } /// Shift hue by a specified number of degrees in the HSL colour space. /// # Arguments /// * `img` - A PhotonImage. /// * `mode` - A float value from 0 to 1 which is the amount to shift the hue by, or hue rotate by. /// /// # Example /// ``` /// // For example to hue rotate/shift the hue by 120 degrees in the HSL colour space: /// use photon::color_spaces::hue_rotate_hsl; /// /// // Open the image. A PhotonImage is returned. /// let img: PhotonImage = open_image("images/flowers.PNG"); /// /// hue_rotate_hsl(&mut img, 120); /// ``` #[wasm_bindgen] pub fn hue_rotate_hsl(img: &mut PhotonImage, degrees: f32) { hsl(img, "shift_hue", degrees); } /// Shift hue by a specified number of degrees in the HSV colour space. /// # Arguments /// * `img` - A PhotonImage. /// * `mode` - A float value from 0 to 1 which is the amount to shift the hue by, or hue rotate by. /// /// # Example /// ``` /// // For example to hue rotate/shift the hue by 120 degrees in the HSV colour space: /// use photon::color_spaces::hue_rotate_hsv; /// /// // Open the image. A PhotonImage is returned. /// let img: PhotonImage = open_image("images/flowers.PNG"); /// /// hue_rotate_hsv(&mut img, 120); /// ``` #[wasm_bindgen] pub fn hue_rotate_hsv(img: &mut PhotonImage, degrees: f32) { hsv(img, "shift_hue", degrees); } /// Shift hue by a specified number of degrees in the LCh colour space. /// # Arguments /// * `img` - A PhotonImage. /// * `mode` - A float value from 0 to 1 which is the amount to shift the hue by, or hue rotate by. /// /// # Example /// ``` /// // For example to hue rotate/shift the hue by 120 degrees in the HSL colour space: /// use photon::color_spaces::hue_rotate_lch; /// /// // Open the image. A PhotonImage is returned. /// let img: PhotonImage = open_image("images/flowers.PNG"); /// /// hue_rotate_lch(&mut img, 120); /// ``` #[wasm_bindgen] pub fn hue_rotate_lch(img: &mut PhotonImage, degrees: f32) { lch(img, "shift_hue", degrees) } /// Increase the image's saturation by converting each pixel's colour to the HSL colour space /// and increasing the colour's saturation. /// # Arguments /// * `img` - A PhotonImage. /// * `level` - Float value from 0 to 1 representing the level to which to increase the saturation by. /// The `level` must be from 0 to 1 in floating-point, `f32` format. /// Increasing saturation by 80% would be represented by a `level` of 0.8 /// /// # Example /// ``` /// // For example to increase saturation by 10% in the HSL colour space: /// use photon::color_spaces::saturate_hsl; /// /// // Open the image. A PhotonImage is returned. /// let img: PhotonImage = open_image("images/flowers.PNG"); /// /// saturate_hsl(&mut img, 0.1); /// ``` #[wasm_bindgen] pub fn saturate_hsl(img: &mut PhotonImage, level: f32) { return hsl(img, "saturate", level); } /// Increase the image's saturation in the LCh colour space. /// # Arguments /// * `img` - A PhotonImage. /// * `level` - Float value from 0 to 1 representing the level to which to increase the saturation by. /// The `level` must be from 0 to 1 in floating-point, `f32` format. /// Increasing saturation by 80% would be represented by a `level` of 0.8 /// /// # Example /// ``` /// // For example to increase saturation by 40% in the Lch colour space: /// use photon::color_spaces::saturate_lch; /// /// // Open the image. A PhotonImage is returned. /// let img: PhotonImage = open_image("images/flowers.PNG"); /// /// saturate_lch(&mut img, 0.4); /// ``` #[wasm_bindgen] pub fn saturate_lch(img: &mut PhotonImage, level: f32) { return lch(img, "saturate", level); } /// Increase the image's saturation in the HSV colour space. /// # Arguments /// * `img` - A PhotonImage. /// * `level` - Float value from 0 to 1 representing the level by which to increase the saturation by. /// The `level` must be from 0 to 1 in floating-point, `f32` format. /// Increasing saturation by 80% would be represented by a `level` of 0.8 /// /// # Example /// ``` /// // For example to increase saturation by 30% in the HSV colour space: /// use photon::color_spaces::saturate_hsv; /// /// // Open the image. A PhotonImage is returned. /// let img: PhotonImage = open_image("images/flowers.PNG"); /// /// saturate_hsv(&mut img, 0.3); /// ``` #[wasm_bindgen] pub fn saturate_hsv(img: &mut PhotonImage, level: f32) { return hsv(img, "saturate", level); } /// Lighten an image by a specified amount in the LCh colour space. /// /// # Arguments /// * `img` - A PhotonImage. /// * `level` - Float value from 0 to 1 representing the level to which to lighten the image by. /// The `level` must be from 0 to 1 in floating-point, `f32` format. /// Lightening by 80% would be represented by a `level` of 0.8 /// /// # Example /// ``` /// // For example to lighten an image by 10% in the LCh colour space: /// use photon::color_spaces::lighten_lch; /// /// // Open the image. A PhotonImage is returned. /// let img: PhotonImage = open_image("images/flowers.PNG"); /// /// lighten_lch(&mut img, 0.1); /// ``` #[wasm_bindgen] pub fn lighten_lch(img: &mut PhotonImage, level: f32) { return lch(img, "lighten", level); } /// Lighten an image by a specified amount in the HSL colour space. /// # Arguments /// * `img` - A PhotonImage. /// * `level` - Float value from 0 to 1 representing the level to which to lighten the image by. /// The `level` must be from 0 to 1 in floating-point, `f32` format. /// Lightening by 80% would be represented by a `level` of 0.8 /// /// # Example /// ``` /// // For example to lighten an image by 10% in the HSL colour space: /// use photon::color_spaces::lighten_hsl; /// /// // Open the image. A PhotonImage is returned. /// let img: PhotonImage = open_image("images/flowers.PNG"); /// /// lighten_hsl(&mut img, 0.1); /// ``` #[wasm_bindgen] pub fn lighten_hsl(img: &mut PhotonImage, level: f32) { return hsl(img, "lighten", level); } /// Lighten an image by a specified amount in the HSV colour space. /// /// # Arguments /// * `img` - A PhotonImage. /// * `level` - Float value from 0 to 1 representing the level to which to lighten the image by. /// The `level` must be from 0 to 1 in floating-point, `f32` format. /// Lightening by 80% would be represented by a `level` of 0.8 /// /// # Example /// ``` /// // For example to lighten an image by 10% in the HSV colour space: /// use photon::color_spaces::lighten_hsv; /// /// // Open the image. A PhotonImage is returned. /// let img: PhotonImage = open_image("images/flowers.PNG"); /// /// lighten_hsv(&mut img, 0.1); /// ``` #[wasm_bindgen] pub fn lighten_hsv(img: &mut PhotonImage, level: f32) { return hsv(img, "lighten", level); } /// Darken the image by a specified amount in the LCh colour space. /// /// # Arguments /// * `img` - A PhotonImage. /// * `level` - Float value from 0 to 1 representing the level to which to darken the image by. /// The `level` must be from 0 to 1 in floating-point, `f32` format. /// Darkening by 80% would be represented by a `level` of 0.8 /// /// # Example /// ``` /// // For example to darken an image by 10% in the LCh colour space: /// use photon::color_spaces::darken_lch; /// /// // Open the image. A PhotonImage is returned. /// let img: PhotonImage = open_image("images/flowers.PNG"); /// /// darken_lch(&mut img, 0.1); /// ``` #[wasm_bindgen] pub fn darken_lch(img: &mut PhotonImage, level: f32) { return lch(img, "darken", level); } /// Darken the image by a specified amount in the HSL colour space. /// /// # Arguments /// * `img` - A PhotonImage. /// * `level` - Float value from 0 to 1 representing the level to which to darken the image by. /// The `level` must be from 0 to 1 in floating-point, `f32` format. /// Darkening by 80% would be represented by a `level` of 0.8 /// /// # Example /// ``` /// // For example to darken an image by 10% in the HSL colour space: /// use photon::color_spaces::darken_hsl; /// /// // Open the image. A PhotonImage is returned. /// let img: PhotonImage = open_image("images/flowers.PNG"); /// /// darken_hsl(&mut img, 0.1); /// ``` #[wasm_bindgen] pub fn darken_hsl(img: &mut PhotonImage, level: f32) { return hsl(img, "darken", level); } /// Darken the image's colours by a specified amount in the HSV colour space. /// /// # Arguments /// * `img` - A PhotonImage. /// * `level` - Float value from 0 to 1 representing the level to which to darken the image by. /// The `level` must be from 0 to 1 in floating-point, `f32` format. /// Darkening by 80% would be represented by a `level` of 0.8 /// /// # Example /// ``` /// // For example to darken an image by 10% in the HSV colour space: /// use photon::color_spaces::darken_hsv; /// /// // Open the image. A PhotonImage is returned. /// let img: PhotonImage = open_image("images/flowers.PNG"); /// /// darken_hsv(&mut img, 0.1); /// ``` #[wasm_bindgen] pub fn darken_hsv(img: &mut PhotonImage, level: f32) { return hsv(img, "darken", level); } /// Desaturate the image by a specified amount in the HSV colour space. /// /// # Arguments /// * `img` - A PhotonImage. /// * `level` - Float value from 0 to 1 representing the level to which to desaturate the image by. /// The `level` must be from 0 to 1 in floating-point, `f32` format. /// Desaturating by 80% would be represented by a `level` of 0.8 /// /// # Example /// ``` /// // For example to desaturate an image by 10% in the HSV colour space: /// use photon::color_spaces::desaturate_hsv; /// /// // Open the image. A PhotonImage is returned. /// let img: PhotonImage = open_image("images/mountains.PNG"); /// /// desaturate_hsv(&mut img, 0.1); /// ``` #[wasm_bindgen] pub fn desaturate_hsv(img: &mut PhotonImage, level: f32) { return hsv(img, "desaturate", level); } /// Desaturate the image by a specified amount in the HSL colour space. /// /// # Arguments /// * `img` - A PhotonImage. /// * `level` - Float value from 0 to 1 representing the level to which to desaturate the image by. /// The `level` must be from 0 to 1 in floating-point, `f32` format. /// Desaturating by 80% would be represented by a `level` of 0.8 /// /// # Example /// ``` /// // For example to desaturate an image by 10% in the LCh colour space: /// use photon::color_spaces::desaturate_hsl; /// /// // Open the image. A PhotonImage is returned. /// let img: PhotonImage = open_image("images/flowers.PNG"); /// /// desaturate_hsl(&mut img, 0.1); /// ``` #[wasm_bindgen] pub fn desaturate_hsl(img: &mut PhotonImage, level: f32) { return hsl(img, "desaturate", level); } /// Desaturate the image by a specified amount in the LCh colour space. /// /// # Arguments /// * `img` - A PhotonImage. /// * `level` - Float value from 0 to 1 representing the level to which to desaturate the image by. /// The `level` must be from 0 to 1 in floating-point, `f32` format. /// Desaturating by 80% would be represented by a `level` of 0.8 /// /// # Example /// ``` /// // For example to desaturate an image by 10% in the LCh colour space: /// use photon::color_spaces::desaturate_lch; /// /// // Open the image. A PhotonImage is returned. /// let img: PhotonImage = open_image("images/flowers.PNG"); /// /// desaturate_lch(&mut img, 0.1); /// ``` #[wasm_bindgen] pub fn desaturate_lch(img: &mut PhotonImage, level: f32) { return lch(img, "desaturate", level); } /// Mix image with a single color, supporting passing `opacity`. /// The algorithm comes from Jimp. See `function mix` and `function colorFn` at following link: /// https://github.com/oliver-moran/jimp/blob/29679faa597228ff2f20d34c5758e4d2257065a3/packages/plugin-color/src/index.js /// Specifically, result_value = (mix_color_value - origin_value) * opacity + origin_value = /// mix_color_value * opacity + (1 - opacity) * origin_value for each /// of RGB channel. /// /// # Arguments /// * `photon_image` - A PhotonImage that contains a view into the image. /// * `mix_color` - the color to be mixed in, as an RGB value. /// * `opacity` - the opacity of color when mixed to image. Float value from 0 to 1. /// # Example /// /// ``` /// // For example, to mix an image with rgb (50, 255, 254) and opacity 0.4: /// use photon::colour_spaces::mix_with_colour; /// /// let mix_colour = Rgb{50, 255, 254}; /// mix_with_colour(photon_image, mix_colour, 0.4); /// ``` #[wasm_bindgen] pub fn mix_with_colour(photon_image: &mut PhotonImage, mix_colour: Rgb, opacity: f32) { let img = helpers::dyn_image_from_raw(&photon_image); let (_width, _height) = img.dimensions(); let mut img = img.to_rgba(); // cache (mix_color_value * opacity) and (1 - opacity) so we dont need to calculate them each time during loop. let mix_red_offset = mix_colour.r as f32 * opacity; let mix_green_offset = mix_colour.g as f32 * opacity; let mix_blue_offset = mix_colour.b as f32 * opacity; let factor = 1.0 - opacity; for x in 0.._width { for y in 0.._height { let px = img.get_pixel(x, y); let r_value = mix_red_offset + (px.data[0] as f32) * factor; let g_value = mix_green_offset + (px.data[1] as f32) * factor; let b_value = mix_blue_offset + (px.data[2] as f32) * factor; let alpha = px.data[3]; img.put_pixel(x, y, image::Rgba ( [r_value as u8, g_value as u8, b_value as u8, alpha] )); } } photon_image.raw_pixels = img.to_vec(); } // #[wasm_bindgen] // pub fn selective_color_convert(mut photon_image: &mut PhotonImage, ref_color:Rgb, new_color:Rgb, fraction: f32) { // let img = helpers::dyn_image_from_raw(&photon_image); // let (_width, _height) = img.dimensions(); // let mut img = img.to_rgba(); // for x in 0.._width { // for y in 0.._height { // let mut px = img.get_pixel(x, y); // // Reference colour to compare the current pixel's colour to // let lab: Lab = Srgb::new(ref_color.r as f32 / 255.0, ref_color.g as f32 / 255.0, ref_color.b as f32 / 255.0).into(); // // Convert the current pixel's colour to the l*a*b colour space // let r_val: f32 = px.data[0] as f32 / 255.0; // let g_val: f32 = px.data[1] as f32 / 255.0; // let b_val: f32 = px.data[2] as f32 / 255.0; // let px_lab: Lab = Srgb::new(r_val, g_val, b_val).into(); // let sim = color_sim(lab, px_lab); // if sim > 0 && sim < 40 { // let newr = (((new_color.r - ref_color.r) as f32) * fraction + new_color.r as f32) as u8; // let newg = (((new_color.g - ref_color.g) as f32) * fraction + new_color.g as f32) as u8; // let newb = (((new_color.b - ref_color.b) as f32) * fraction + new_color.b as f32) as u8; // img.put_pixel(x, y, image::Rgba([newr, newg, newb, 255])); // } // } // } // photon_image.raw_pixels = img.to_vec(); // } // pub fn correct(img: &DynamicImage, mode: &'static str, colour_space: &'static str, amt: f32) -> DynamicImage { // let mut img = img.to_rgb(); // let (width, height) = img.dimensions(); // for x in 0..width { // for y in 0..height { // let px_data = img.get_pixel(x, y).data; // let colour_to_cspace; // if colour_space == "hsv" { // colour_to_cspace: Hsv = Srgb::from_raw(&px_data).into_format(); // } // else if colour_space == "hsl" { // colour_to_cspace = Hsl::from(color); // } // else { // colour_to_cspace = Lch::from(color); // } // let new_color = match mode { // // Match a single value // "desaturate" => colour_to_cspace.desaturate(amt), // "saturate" => colour_to_cspace.saturate(amt), // "lighten" => colour_to_cspace.lighten(amt), // "darken" => colour_to_cspace.darken(amt), // _ => colour_to_cspace.saturate(amt), // }; // img.put_pixel(x, y, image::Rgb { // data: Srgb::from_linear(new_color.into()).into_format().into_raw() // }); // } // } // let dynimage = image::ImageRgb8(img); // return dynimage; // }