Fonts and text

Cargo.toml

@@ -7,6 +7,8 @@ edition = "2024"
 crate-type = ["cdylib"]
 
 [dependencies]
+fontdue = "0.9.3"
+lazy_static = "1.5.0"
 wasm-bindgen = {version = "0.2.104"}
 web-sys = {version = "0.3.81", features = ['CanvasRenderingContext2d', 'Document', 'Element', 'HtmlCanvasElement', 'Window', 'ImageData']}
 

src/app/mod.rs

@@ -54,7 +54,7 @@ impl App {
     }
 
     pub fn draw(&mut self) {
-        if let Some(view) = &self.root_view {
+        if let Some(view) = &mut self.root_view {
             let (width, height) = (
                 self.renderer.actual_width.clone() as f32,
                 self.renderer.actual_height.clone() as f32,

src/fonts.rs

@@ -0,0 +1,23 @@
+use fontdue::Font;
+use lazy_static::lazy_static;
+
+// Include the fonts in the binary
+pub static ATKINSON_HYPERLEGIBLE_REGULAR: &'static [u8] =
+    include_bytes!("../fonts/Atkinson_Hyperlegible/AtkinsonHyperlegible-Regular.ttf");
+
+// Parse the fonts at runtime
+lazy_static! {
+    pub static ref FONTS: Vec<Font> = vec![
+        Font::from_bytes(
+            ATKINSON_HYPERLEGIBLE_REGULAR,
+            fontdue::FontSettings::default()
+        )
+        .unwrap(),
+    ];
+}
+
+#[non_exhaustive]
+#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Debug)]
+pub enum FontHandle {
+    AtiksonHyperlegibleRegular = 0,
+}

src/lib.rs

@@ -1,5 +1,6 @@
 // mod activities;
 mod app;
+mod fonts;
 mod render;
 mod views;
 
@@ -28,32 +29,9 @@ macro_rules! log {
 
 #[wasm_bindgen]
 pub fn init(canvas: &web_sys::HtmlCanvasElement, width: u32, height: u32) -> App {
-    let (cwidth, cheight, dist_x, dist_y) = render::calc_resolution(width, height);
-    canvas.set_width(cwidth);
-    canvas.set_height(cheight);
-
     log!("WASM Successfully initialized!");
-    // set_cursor(Cursor::Auto);
-
-    let mut renderer = Renderer {
-        ctx: canvas
-            .get_context("2d")
-            .unwrap()
-            .unwrap()
-            .dyn_into::<web_sys::CanvasRenderingContext2d>()
-            .unwrap(),
-        img: ImgBuffer::new(width, height),
-        rand: Rnd::new(9825782),
-
-        canvas_width: cwidth,
-        canvas_height: cheight,
-        actual_width: width,
-        actual_height: height,
-
-        distortion_x: dist_x,
-        distortion_y: dist_y,
-    };
 
+    let mut renderer = Renderer::new(canvas, width, height);
     renderer.resize(width, height);
 
     App::new(renderer)

src/render/buffer.rs

@@ -29,6 +29,19 @@ impl ImgBuffer {
         }
     }
 
+    pub fn overlay_bitmap(&mut self, other: &Bitmap, xoffset: usize, yoffset: usize) {
+        for y in 0..other.height {
+            for x in 0..other.width {
+                let offset = (y + yoffset) * self.width as usize + (x + xoffset);
+                let color = other.data[y * other.width + x];
+                self.data[offset * 4] = color;
+                self.data[offset * 4 + 1] = color;
+                self.data[offset * 4 + 2] = color;
+                self.data[offset * 4 + 3] = 255;
+            }
+        }
+    }
+
     pub fn resize(&mut self, width: u32, height: u32) {
         self.data = vec![0; (width * height * 4) as usize];
         self.width = width;
@@ -371,3 +384,63 @@ impl ImgBuffer {
 //     //     self.data[y*self.width + x] = color;
 //     // }
 // }
+
+pub struct Bitmap {
+    pub data: Vec<u8>,
+    pub width: usize,
+    pub height: usize,
+}
+
+impl Bitmap {
+    pub fn new(width: usize, height: usize) -> Self {
+        Self {
+            data: vec![0; width * height],
+            width,
+            height,
+        }
+    }
+
+    pub fn from_data(data: Vec<u8>, width: usize, height: usize) -> Self {
+        // assert!(data.len() == width * height, "Invalid data length!");z
+        Self {
+            data,
+            width,
+            height,
+        }
+    }
+
+    pub fn overlay(&mut self, other: &Bitmap, xoffset: usize, yoffset: usize) {
+        for y in 0..other.height {
+            for x in 0..other.width {
+                self.data[(y + yoffset as usize) * self.width + (x + xoffset as usize)] =
+                    other.data[y * other.width + x];
+            }
+        }
+    }
+
+    /// Scale using nearest-neighbor (faster but lower quality)
+    pub fn scale(&self, scale_x: f32, scale_y: f32) -> Bitmap {
+        let new_width = (self.width as f32 * scale_x).round() as usize;
+        let new_height = (self.height as f32 * scale_y).round() as usize;
+
+        let mut new_data = vec![0u8; new_width * new_height];
+
+        for y in 0..new_height {
+            let src_y = ((y as f32) / scale_y) as usize;
+            let src_y = src_y.min(self.height - 1);
+
+            for x in 0..new_width {
+                let src_x = ((x as f32) / scale_x) as usize;
+                let src_x = src_x.min(self.width - 1);
+
+                new_data[y * new_width + x] = self.data[src_y * self.width + src_x];
+            }
+        }
+
+        Bitmap {
+            data: new_data,
+            width: new_width,
+            height: new_height,
+        }
+    }
+}

src/render/mod.rs

@@ -4,7 +4,7 @@ mod renderer;
 
 pub use renderer::Renderer;
 
-pub const RESOLUTION: u32 = 1200;
+pub const RESOLUTION: u32 = 2000;
 
 pub fn calc_resolution(width: u32, height: u32) -> (u32, u32, f32, f32) {
     let aspect = width as f32 / height as f32;

src/render/renderer.rs

@@ -1,7 +1,13 @@
+use fontdue::layout::{CoordinateSystem, Layout, LayoutSettings, TextStyle};
 use wasm_bindgen::{Clamped, prelude::*};
 use web_sys::ImageData;
 
-use crate::render::{RESOLUTION, buffer::ImgBuffer, calc_resolution, rand::Rnd};
+use crate::render::{
+    RESOLUTION,
+    buffer::{Bitmap, ImgBuffer},
+    calc_resolution,
+    rand::Rnd,
+};
 
 #[wasm_bindgen]
 pub struct Renderer {
@@ -16,6 +22,8 @@ pub struct Renderer {
 
     pub distortion_x: f32,
     pub distortion_y: f32,
+    pub ratio_x: f32,
+    pub ratio_y: f32,
 }
 
 impl Renderer {
@@ -42,6 +50,8 @@ impl Renderer {
             actual_height: height,
             distortion_x: dist_x,
             distortion_y: dist_y,
+            ratio_x: cwidth as f32 / width as f32,
+            ratio_y: cheight as f32 / height as f32,
         }
     }
 
@@ -55,6 +65,9 @@ impl Renderer {
         self.distortion_x = dist_x;
         self.distortion_y = dist_y;
 
+        self.ratio_x = cwidth as f32 / width as f32;
+        self.ratio_y = cheight as f32 / height as f32;
+
         self.img.resize(cwidth, cheight);
         self.ctx.canvas().unwrap().set_width(cwidth);
         self.ctx.canvas().unwrap().set_height(cheight);
@@ -77,10 +90,7 @@ impl Renderer {
 
 impl Renderer {
     pub fn undistort(&self, x: f32, y: f32) -> (f32, f32) {
-        (
-            x * (self.canvas_width as f32 / self.actual_width as f32),
-            y * (self.canvas_height as f32 / self.actual_height as f32),
-        )
+        (x * self.ratio_x, y * self.ratio_y)
     }
 
     /// Draw a rectangle centered at (cx, cy) with the given width and height.
@@ -159,3 +169,25 @@ impl Renderer {
         }
     }
 }
+
+// // Fonts
+// impl Renderer {
+//     pub fn rasterize_font(
+//         &mut self,
+//         x: i32,
+//         y: i32,
+//         text: &str,
+//         font_scale: f32,
+//         font: FontHandle,
+//     ) {
+//     }
+
+//     pub fn measure_text_bounds(
+//         &mut self,
+//         text: &str,
+//         font_scale: i32,
+//         font: FontHandle,
+//     ) -> (i32, i32) {
+//         (100, 100)
+//     }
+// }

src/views/color_rect_view.rs

@@ -1,5 +1,4 @@
 use crate::{
-    log,
     render::Renderer,
     views::{Bounds, View},
 };
@@ -15,11 +14,11 @@ impl ColorRectView {
 }
 
 impl View for ColorRectView {
-    fn draw(&self, renderer: &mut Renderer, x: f32, y: f32, w: f32, h: f32) {
+    fn draw(&mut self, renderer: &mut Renderer, x: f32, y: f32, w: f32, h: f32) {
         renderer.rect_xywh(x as i32, y as i32, w as i32, h as i32, self.color);
-        log!("Draw");
+        // log!("Draw");
     }
     fn bounds(&self, _ph: f32, _pw: f32) -> (Bounds, Bounds) {
-        (Bounds::MatchParent, Bounds::Pixels(2200.))
+        (Bounds::MatchParent, Bounds::Pixels(200.))
     }
 }

src/views/mod.rs

@@ -1,13 +1,15 @@
 use crate::render::Renderer;
 
 mod color_rect_view;
+mod text_view;
 mod vertical_layout;
 
 use color_rect_view::ColorRectView;
+use text_view::TextView;
 use vertical_layout::VerticalLayout;
 
 pub trait View {
-    fn draw(&self, renderer: &mut Renderer, x: f32, y: f32, w: f32, h: f32);
+    fn draw(&mut self, renderer: &mut Renderer, x: f32, y: f32, w: f32, h: f32);
     fn bounds(&self, pw: f32, ph: f32) -> (Bounds, Bounds);
 }
 
@@ -23,6 +25,7 @@ pub enum Bounds {
 pub fn default_view() -> Box<dyn View> {
     Box::new(VerticalLayout::new(vec![
         Box::new(ColorRectView::new(12, 34, 56)),
+        Box::new(TextView::new("Testing!\n12345".to_string())),
         Box::new(ColorRectView::new(20, 60, 80)),
     ]))
 }

src/views/text_view.rs

@@ -0,0 +1,85 @@
+use fontdue::layout::{CoordinateSystem, Layout, LayoutSettings, TextStyle};
+
+use crate::{
+    fonts::{FONTS, FontHandle},
+    log,
+    render::{Renderer, buffer::Bitmap},
+    views::{Bounds, View},
+};
+
+pub struct TextView {
+    layout: Layout,
+    text: String,
+    scale: f32,
+    font: FontHandle,
+}
+
+impl TextView {
+    pub fn new(text: String) -> Self {
+        let mut layout = Layout::new(CoordinateSystem::PositiveYDown);
+
+        layout.reset(&LayoutSettings {
+            ..LayoutSettings::default()
+        });
+
+        Self {
+            layout,
+            text,
+            scale: 20.,
+            font: FontHandle::AtiksonHyperlegibleRegular,
+        }
+    }
+}
+
+impl View for TextView {
+    fn draw(&mut self, renderer: &mut Renderer, x: f32, y: f32, w: f32, h: f32) {
+        // renderer.rasterize_font(
+        //     x as i32,
+        //     y as i32,
+        //     &self.text,
+        //     20.,
+        //     FontHandle::AtiksonHyperlegibleRegular,
+        // );
+        // renderer.
+
+        // renderer.rect_xywh(x as i32, y as i32, w as i32, h as i32, self.color);
+
+        let (x, y) = renderer.undistort(x as f32, y as f32);
+
+        let font = (self.font as usize).clone();
+
+        self.layout.clear();
+
+        self.layout
+            .append(&FONTS, &TextStyle::new(&self.text, self.scale, font));
+
+        let (mut width, mut height): (usize, usize) = (0, 0);
+        for glyph in self.layout.glyphs() {
+            width = width.max(glyph.x as usize + glyph.width);
+            height = height.max(glyph.y as usize + glyph.height);
+        }
+
+        let x_padding = 0.;
+        let mut new_bitmap = Bitmap::new(width + 2 * (self.scale * x_padding) as usize, height);
+
+        for glyph in self.layout.glyphs() {
+            let font = &FONTS[glyph.font_index];
+            let (_, char_bitmap) = font.rasterize_config(glyph.key);
+
+            new_bitmap.overlay(
+                &Bitmap::from_data(char_bitmap, glyph.width, glyph.height),
+                glyph.x as usize,
+                glyph.y as usize,
+            );
+        }
+
+        let scaled = new_bitmap.scale(renderer.ratio_x, renderer.ratio_y);
+
+        renderer.img.overlay_bitmap(&scaled, x as usize, y as usize);
+
+        // new_bitmap
+    }
+    fn bounds(&self, _ph: f32, _pw: f32) -> (Bounds, Bounds) {
+        (Bounds::MatchParent, Bounds::Pixels(200.))
+    }
+}

src/views/vertical_layout.rs

@@ -11,10 +11,10 @@ impl VerticalLayout {
 }
 
 impl View for VerticalLayout {
-    fn draw(&self, renderer: &mut crate::render::Renderer, x: f32, y: f32, w: f32, h: f32) {
+    fn draw(&mut self, renderer: &mut crate::render::Renderer, x: f32, y: f32, w: f32, h: f32) {
         let mut cur_y = y;
 
-        for view in &self.views {
+        for view in &mut self.views {
             let (vx, vy) = view.bounds(w, h);
 
             let vx = match vx {