chirp-imgui: Argument parsing + colors in Settings

src/bin/chirp-imgui/args.rs

@@ -0,0 +1,52 @@
+//! Parses arguments into a struct
+
+use std::path::PathBuf;
+
+use super::Emulator;
+use chirp::Mode;
+use gumdrop::*;
+
+/// Parses a hexadecimal string into a u16
+fn parse_hex(value: &str) -> std::result::Result<u16, std::num::ParseIntError> {
+    u16::from_str_radix(value, 16)
+}
+
+#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Options, Hash)]
+pub struct Arguments {
+    #[options(help = "Load a ROM to run on Chirp.", required, free)]
+    pub file: PathBuf,
+    #[options(help = "Print this help message.")]
+    help: bool,
+    #[options(help = "Enable debug mode at startup.")]
+    pub debug: bool,
+    #[options(help = "Enable pause mode at startup.")]
+    pub pause: bool,
+    #[options(help = "Set the instructions-per-frame rate.")]
+    pub speed: Option<usize>,
+    // #[options(help = "Enable performance benchmarking on stderr (requires -S)")]
+    // pub perf: bool,
+    #[options(help = "Run in (Chip8, SChip, XOChip) mode.")]
+    pub mode: Option<Mode>,
+    #[options(help = "Set the target framerate.", default = "60", meta = "FR")]
+    pub frame_rate: u64,
+}
+
+impl Arguments {
+    pub fn parse() -> Arguments {
+        Arguments::parse_args_default_or_exit()
+    }
+}
+
+impl From<Arguments> for Emulator {
+    fn from(value: Arguments) -> Self {
+        let mut emu = Emulator::new(value.speed.unwrap_or(10), value.file);
+        if let Some(mode) = value.mode {
+            emu.set_quirks(mode.into());
+        }
+        if value.pause {
+            emu.pause()
+        }
+        emu.set_disasm(value.debug);
+        emu
+    }
+}

src/bin/chirp-imgui/gui/menubar.rs

@@ -2,7 +2,7 @@
 
 use super::Drawable;
 
-#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[derive(Clone, Debug, PartialEq, PartialOrd)]
 pub struct Menubar {
     pub(super) active: bool,
     pub file: File,
@@ -86,12 +86,12 @@ impl Drawable for Help {
     }
 }
 
-#[derive(Clone, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[derive(Clone, Debug, Default, PartialEq, PartialOrd)]
 pub struct Settings {
     pub(super) target_ipf: usize,
     pub(super) quirks: chirp::Quirks,
     pub(super) mode_index: usize,
-    pub(super) colors: [[u8; 4]; 2],
+    pub(super) colors: [[f32; 4]; 2],
     pub(super) applied: bool,
 }
 
@@ -100,6 +100,12 @@ impl Drawable for Settings {
         self.applied = false;
         ui.menu("Settings", || {
             use chirp::Mode::*;
+            ui.menu("Foreground Color", || {
+                self.applied |= ui.color_picker4("", &mut self.colors[0])
+            });
+            ui.menu("Background Color", || {
+                self.applied |= ui.color_picker4("", &mut self.colors[1])
+            });
             const MODES: [chirp::Mode; 3] = [Chip8, SChip, XOChip];
             if ui.combo_simple_string("Mode", &mut self.mode_index, &MODES) {
                 self.quirks = MODES[self.mode_index].into();
@@ -115,7 +121,7 @@ impl Drawable for Settings {
                     | ui.checkbox("Screen wraps at edge", &mut self.quirks.screen_wrap)
                     | ui.checkbox("Shift ops ignore vY", &mut self.quirks.shift)
                     | ui.checkbox("Jumps behave eratically", &mut self.quirks.stupid_jumps)
-            }
+            };
         })
     }
 }
@@ -127,7 +133,32 @@ impl Settings {
     pub fn quirks(&mut self) -> &mut chirp::Quirks {
         &mut self.quirks
     }
-    pub fn applied(&mut self) -> Option<(usize, chirp::Quirks)> {
+    pub fn set_mode(&mut self, mode: chirp::Mode) {
-        self.applied.then_some((self.target_ipf, self.quirks))
+        self.mode_index = mode as usize;
+    }
+    pub fn set_color(&mut self, fg: &[u8; 4], bg: &[u8; 4]) {
+        for (idx, component) in fg.iter().enumerate() {
+            self.colors[0][idx] = *component as f32 / 255.0;
+        }
+        for (idx, component) in bg.iter().enumerate() {
+            self.colors[1][idx] = *component as f32 / 255.0;
+        }
+    }
+    pub fn applied(&mut self) -> Option<(usize, chirp::Quirks, [u8; 4], [u8; 4])> {
+        let (fg, bg) = (self.colors[0], self.colors[1]);
+        let fg = [
+            (fg[0] * 255.0) as u8,
+            (fg[1] * 255.0) as u8,
+            (fg[2] * 255.0) as u8,
+            (fg[3] * 255.0) as u8,
+        ];
+        let bg = [
+            (bg[0] * 255.0) as u8,
+            (bg[1] * 255.0) as u8,
+            (bg[2] * 255.0) as u8,
+            (bg[3] * 255.0) as u8,
+        ];
+        self.applied
+            .then_some((self.target_ipf, self.quirks, fg, bg))
     }
 }

src/bin/chirp-imgui/main.rs

@@ -2,10 +2,12 @@
 #![deny(clippy::all)]
 #![allow(dead_code)] // TODO: finish writing the code
 
+mod args;
 mod emu;
 mod error;
 mod gui;
 
+use crate::args::Arguments;
 use crate::emu::*;
 use crate::gui::*;
 use pixels::{Pixels, SurfaceTexture};
@@ -28,17 +30,11 @@ struct Application {
 }
 
 fn main() -> Result<(), error::Error> {
-    let rom_path;
+    let args = Arguments::parse();
-    if let Some(path) = std::env::args().nth(1) {
-        rom_path = path;
-    } else {
-        panic!("Supply a rom!");
-    }
-
     let event_loop = EventLoop::new();
     let mut input = WinitInputHelper::new();
 
-    let size = LogicalSize::new(128 * 6, 64 * 6);
+    let size = LogicalSize::new(128 * 8, 64 * 8);
     let window = WindowBuilder::new()
         .with_title("Chirp")
         .with_inner_size(size)
@@ -52,13 +48,18 @@ fn main() -> Result<(), error::Error> {
         Pixels::new(128, 64, surface_texture)?
     };
 
-    let mut app = Application::new(
+    let mut gui = Gui::new(&window, &pixels);
-        Emulator::new(INIT_SPEED, rom_path),
-        Gui::new(&window, &pixels),
-    );
-
     // set initial parameters
-    *app.gui.menubar.settings.target_ipf() = INIT_SPEED;
+    if let Some(mode) = args.mode {
+        gui.menubar.settings.set_mode(mode);
+    }
+
+    gui.menubar.settings.set_color(FOREGROUND, BACKGROUND);
+    *gui.menubar.settings.target_ipf() = args.speed.unwrap_or(INIT_SPEED);
+
+    let mut app = Application::new(args.into(), gui);
+
+    // Copy quirks from the running Emulator, for consistency
     *app.gui.menubar.settings.quirks() = app.emu.quirks();
 
     // Run event loop
@@ -114,10 +115,10 @@ fn main() -> Result<(), error::Error> {
                 state.emu.input(&input)?;
 
                 // Apply settings
-                if let Some((ipf, quirks)) = state.gui.menubar.settings.applied() {
+                if let Some((ipf, quirks, fg, bg)) = state.gui.menubar.settings.applied() {
                     state.emu.ipf = ipf;
                     state.emu.set_quirks(quirks);
-                    println!("'A");
+                    state.emu.colors = [fg, bg];
                 }
 
                 // Update the scale factor