fix brightness, contrast, saturation, hue, gamma and remove opacity

Cargo.toml

@@ -1,10 +1,16 @@
 [package]
 name = "img2irc"
-version = "0.2.0"
+version = "1.0.0"
 authors = ["anatolybazarov"]
 github = "https://github.com/anatolybazarov/img2irc"
 edition = "2021"
 
+[profile.release]
+lto = true
+codegen-units = 1
+opt-level = "z"
+strip = true  # Automatically strip symbols from the binary.
+
 [dependencies]
 tokio = { version = "1", features = ["rt", "rt-multi-thread", "macros"] }
 reqwest = "0.11.14"

README.md

@@ -1,4 +1,4 @@
-# img2irc (0.2.0)
+# img2irc (1.0.0)
 ![img2irc preview](https://i.imgur.com/oetHhMB.png)
 
 img2irc is a utility which converts images to halfblock irc/ansi art, with a lot of post-processing filters
@@ -14,14 +14,15 @@ the `irc` mode has 99 colours, the `ansi` mode has 256, `ansi24` has 16777216
 | option | description | default value |
 | ------ | ----------- | ------------- |
 | `<IMAGE>` | image url or file path | none |
-| `-r, --render <RENDER>` | render type (irc, ansi, ansi24) | irc |
+| `--irc` | irc render type | true |
+| `--ansi` | 8-bit ansi render type | false |
+| `--ansi24` | 24-bit ansi render type | false |
 | `-w, --width <WIDTH>` | output image width in columns | 50 |
 | `-b, --brightness=<BRIGHTNESS>` | adjust brightness (-255 to 255) | 0 |
-| `-H, --hue=<HUE>` | adjust hue (-180 to 180) | 0 |
 | `-c, --contrast=<CONTRAST>` | adjust contrast (-255 to 255) | 0 |
 | `-s, --saturation=<SATURATION>` | adjust saturation (-255 to 255) | 0 |
-| `-o, --opacity=<OPACITY>` | adjust opacity (-255 to 255) | 0 |
-| `-g, --gamma=<GAMMA>` | adjust gamma (-255 to 255) | 0 |
+| `-H, --hue <HUE>` | rotate hue (0 to 360) | 0 |
+| `-g, --gamma <GAMMA>` | adjust gamma (0 to 255) | 0 |
 | `--dither <DITHER>` | dithering (1 to 8) | 0 |
 | `--pixelize <PIXELIZE>` | pixelize pixel size | 0 |
 | `--gaussian-blur <GAUSSIAN_BLUR>` | gaussian blur radius | 0 |

src/args.rs

@@ -7,37 +7,41 @@ pub struct Args {
     #[arg(index = 1)]
     pub image: String,
 
-    /// render type (irc, ansi)
-    #[arg(short, long)]
-    pub render: Option<String>,
+    /// irc
+    #[arg(long, default_value_t = false)]
+    pub irc: bool,
+
+    /// 8-bit ansi
+    #[arg(long, default_value_t = false)]
+    pub ansi: bool,
+
+    /// 24-bit ansi
+    #[arg(long, default_value_t = false)]
+    pub ansi24: bool,
 
     /// image width to resize to
     #[arg(short, long, default_value_t = 50)]
     pub width: u32,
 
     /// brightness (-255 to 255)
-    #[arg(short, long, require_equals = true, default_value_t = 0)]
-    pub brightness: i16,
-
-    /// hue (-180 to 180)
-    #[arg(short = 'H', long, require_equals = true, default_value_t = 0)]
-    pub hue: i16,
+    #[arg(short, long, require_equals = true, default_value_t = 0.0)]
+    pub brightness: f32,
 
     /// contrast (-255 to 255)
-    #[arg(short, long, require_equals = true, default_value_t = 0)]
-    pub contrast: i16,
+    #[arg(short, long, require_equals = true, default_value_t = 0.0)]
+    pub contrast: f32,
 
     /// saturation (-255 to 255)
-    #[arg(short, long, require_equals = true, default_value_t = 0)]
-    pub saturation: i16,
+    #[arg(short, long, require_equals = true, default_value_t = 0.0)]
+    pub saturation: f32,
 
-    /// opacity (-255 to 255)
-    #[arg(short, long, require_equals = true, default_value_t = 0)]
-    pub opacity: i16,
+    /// hue (0 to 360)
+    #[arg(short = 'H', long, default_value_t = 0.0)]
+    pub hue: f32,
 
-    /// gamma (-255 to 255)
-    #[arg(short, long, require_equals = true, default_value_t = 0)]
-    pub gamma: i16,
+    /// gamma (0 to 255)
+    #[arg(short, long, default_value_t = 0.0)]
+    pub gamma: f32,
 
     /// dither (1 to 8)
     #[arg(long, default_value_t = 0)]

src/effects.rs

@@ -1,5 +1,6 @@
 use crate::args;
-use photon_rs::{channels, channels::alter_channels, conv, effects, filters, monochrome, noise};
+use photon_rs::{colour_spaces};
+use photon_rs::{channels, conv, effects, filters, monochrome, noise};
 use photon_rs::transform::{resize, SamplingFilter};
 use photon_rs::PhotonImage;
 
@@ -15,33 +16,41 @@ pub fn apply_effects(
     photon_image = resize(&mut photon_image, args.width, height, SamplingFilter::Lanczos3);
 
     // Adjust brightness
-    if args.brightness != 0 {
-        alter_channels(&mut photon_image, args.brightness, args.brightness, args.brightness);
+    match args.brightness {
+        x if x > 0.0 => {
+            colour_spaces::hsv(&mut photon_image, "brighten", args.brightness/255.0);
+        }
+        x if x < 0.0 => {
+            colour_spaces::hsv(&mut photon_image, "darken", args.brightness.abs()/255.0);
+        },
+        _ => {}
     }
 
     // Adjust hue
-    if args.hue != 0 {
-        alter_channels(&mut photon_image, args.hue, args.hue, args.hue);
+    if args.hue > 0.0 {
+        colour_spaces::hsv(&mut photon_image, "shift_hue", args.hue/360.0);
     }
 
     // Adjust contrast
-    if args.contrast != 0 {
-        alter_channels(&mut photon_image, args.contrast, args.contrast, args.contrast);
+    if args.contrast != 0.0 {
+        effects::adjust_contrast(&mut photon_image, args.contrast);
     }
 
     // Adjust saturation
-    if args.saturation != 0 {
-        alter_channels(&mut photon_image, args.saturation, args.saturation, args.saturation);
+    match args.saturation {
+        x if x > 0.0 => {
+            colour_spaces::hsv(&mut photon_image, "saturate", args.saturation/255.0);
         }
-
-    // Adjust opacity
-    if args.opacity != 0 {
-        alter_channels(&mut photon_image, args.opacity, args.opacity, args.opacity);
+        x if x < 0.0 => {
+            colour_spaces::hsv(&mut photon_image, "desaturate", args.saturation.abs()/255.0);
+        }
+        _ => {}
     }
 
     // Adjust gamma
-    if args.gamma != 0 {
-        alter_channels(&mut photon_image, args.gamma, args.gamma, args.gamma);
+    if args.gamma != 0.0 {
+        let gamma_value = 1.0 - args.gamma/255.0;
+        colour_spaces::gamma_correction(&mut photon_image, gamma_value, gamma_value, gamma_value);
     }
 
     // Adjust dither
@@ -51,7 +60,6 @@ pub fn apply_effects(
 
     // Adjust gaussian_blur
     if args.gaussian_blur > 0 {
-        
         conv::gaussian_blur(&mut photon_image, args.gaussian_blur);
     }
 

src/main.rs

@@ -22,18 +22,17 @@ async fn main() {
             );
 
             let canvas = draw::AnsiImage::new(image);
-            match &args.render {
-                None => println!("{}", draw::irc_draw(canvas).as_str()),
-                Some(ref render) => match render.as_str() {
-                    "irc" => println!("{}", draw::irc_draw(canvas).as_str()),
-                    "ansi" => println!("{}", draw::ansi_draw_8bit(canvas).as_str()),
-                    "ansi24" => println!("{}", draw::ansi_draw_24bit(canvas).as_str()),
-                    _ => {
-                        eprintln!("Error: invalid render type");
-                        exit(1);
-                    }
-                },
+
+            if args.irc {
+                println!("{}", draw::irc_draw(canvas).as_str());
+            } else if args.ansi {
+                println!("{}", draw::ansi_draw_8bit(canvas).as_str());
+            } else if args.ansi24 {
+                println!("{}", draw::ansi_draw_24bit(canvas).as_str());
+            } else {
+                println!("{}", draw::irc_draw(canvas).as_str());
             }
+
         }
         Err(e) => {
             eprintln!("Error: {}", e);