cache rendered chars

Cargo.lock

@@ -1521,9 +1521,7 @@ dependencies = [
 
 [[package]]
 name = "servicepoint"
-version = "0.15.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7d1e88713031e003dc3ee708dbb282e36714eee466a12d311d0e2e24c61c7118"
+version = "0.16.0"
 dependencies = [
  "bitvec",
  "bzip2",

Cargo.toml

@@ -19,9 +19,6 @@ env_logger = "0.11"
 clap = { version = "4.5", features = ["derive"] }
 thiserror = "2.0"
 
-# package parsing
-servicepoint = { features = ["all_compressions"], version = "0.15.2" }
-
 # font rendering
 font-kit = "0.14.2"
 # I should not need this as a direct dependency, but then I cannot spell the types needed to use font-kit...
@@ -32,6 +29,11 @@ winit = "0.30"
 # for drawing pixels onto the surface of the window
 softbuffer = "0.4.6"
 
+[dependencies.servicepoint]
+version = "0.16.0"
+features = ["all_compressions"]
+path = "../servicepoint-uniffi3"
+
 [profile.release]
 lto = true          # Enable link-time optimization
 codegen-units = 1   # Reduce number of codegen units to increase optimizations

src/command_executor.rs

@@ -5,10 +5,11 @@ use crate::{
 };
 use log::{debug, error, info, trace, warn};
 use servicepoint::{
-    BinaryOperation, BitVecCommand, Bitmap, BitmapCommand, GlobalBrightnessCommand,
-    BrightnessGrid, BrightnessGridCommand, CharGridCommand, ClearCommand,
-    CompressionCode, Cp437GridCommand, FadeOutCommand, Grid, HardResetCommand,
-    Origin, TypedCommand, PIXEL_COUNT, PIXEL_WIDTH, TILE_SIZE,
+    BinaryOperation, BitVecCommand, Bitmap, BitmapCommand, BrightnessGrid,
+    BrightnessGridCommand, CharGridCommand, ClearCommand, CompressionCode,
+    Cp437GridCommand, FadeOutCommand, GlobalBrightnessCommand,
+    HardResetCommand, Origin, TypedCommand, PIXEL_COUNT, PIXEL_WIDTH,
+    TILE_SIZE,
 };
 use std::{
     ops::{BitAnd, BitOr, BitXor},
@@ -46,11 +47,11 @@ impl CommandExecute for BitmapCommand {
     fn execute(&self, context: &CommandExecutionContext) -> ExecutionResult {
         let Self {
             origin:
-            Origin {
-                x: offset_x,
-                y: offset_y,
-                ..
-            },
+                Origin {
+                    x: offset_x,
+                    y: offset_y,
+                    ..
+                },
             bitmap: pixels,
             ..
         } = self;
@@ -143,7 +144,7 @@ impl CommandExecute for Cp437GridCommand {
                     bitmap: context.cp437_font[char_code].clone(),
                     compression: CompressionCode::default(),
                 }
-                    .execute(context);
+                .execute(context);
                 match execute_result {
                     Success => {}
                     Failure => {
@@ -199,8 +200,14 @@ impl CommandExecute for CharGridCommand {
 
                 if let Err(e) = context.font_renderer.render(
                     char,
-                    &mut display,
-                    Origin::new(tile_x * TILE_SIZE, tile_y * TILE_SIZE),
+                    &mut display
+                        .window_mut(
+                            tile_x * TILE_SIZE,
+                            tile_y * TILE_SIZE,
+                            TILE_SIZE,
+                            TILE_SIZE,
+                        )
+                        .unwrap(),
                 ) {
                     error!(
                         "stopping drawing text because char draw failed: {e}"

src/font_renderer.rs

@@ -12,8 +12,11 @@ use pathfinder_geometry::{
     transform2d::Transform2F,
     vector::{vec2f, vec2i},
 };
-use servicepoint::{Bitmap, Grid, Origin, Pixels, TILE_SIZE};
-use std::sync::{Mutex, MutexGuard};
+use servicepoint::{Bitmap, GridMut, WindowMut, TILE_SIZE};
+use std::{
+    collections::HashMap,
+    sync::{Mutex, MutexGuard},
+};
 
 #[derive(Debug)]
 struct SendFont(Font);
@@ -32,6 +35,7 @@ pub struct FontRenderer8x8 {
     font: SendFont,
     canvas: Mutex<Canvas>,
     fallback_char: Option<u32>,
+    cache: Mutex<HashMap<char, Bitmap>>,
 }
 
 #[derive(Debug, thiserror::Error)]
@@ -56,6 +60,7 @@ impl FontRenderer8x8 {
             font: SendFont(font),
             fallback_char,
             canvas: Mutex::new(canvas),
+            cache: Mutex::new(HashMap::new()),
         }
     }
 
@@ -74,9 +79,13 @@ impl FontRenderer8x8 {
     pub fn render(
         &self,
         char: char,
-        bitmap: &mut Bitmap,
-        offset: Origin<Pixels>,
+        target: &mut WindowMut<bool, Bitmap>,
     ) -> Result<(), RenderError> {
+        let cache = &mut *self.cache.lock().unwrap();
+        if let Some(drawn_char) = cache.get(&char) {
+            target.deref_assign(drawn_char);
+        }
+
         let glyph_id = self.get_glyph(char)?;
 
         let mut canvas = self.canvas.lock().unwrap();
@@ -91,20 +100,21 @@ impl FontRenderer8x8 {
             RasterizationOptions::Bilevel,
         )?;
 
-        Self::copy_to_bitmap(canvas, bitmap, offset)
+        let mut bitmap = Bitmap::new(TILE_SIZE, TILE_SIZE).unwrap();
+        Self::copy_to_bitmap(canvas, &mut bitmap)?;
+        target.deref_assign(&bitmap);
+        cache.insert(char, bitmap);
+        Ok(())
     }
 
     fn copy_to_bitmap(
         canvas: MutexGuard<Canvas>,
         bitmap: &mut Bitmap,
-        offset: Origin<Pixels>,
     ) -> Result<(), RenderError> {
         for y in 0..TILE_SIZE {
             for x in 0..TILE_SIZE {
                 let canvas_val = canvas.pixels[x + y * TILE_SIZE] != 0;
-                let bitmap_x = offset.x + x;
-                let bitmap_y = offset.y + y;
-                if !bitmap.set_optional(bitmap_x, bitmap_y, canvas_val) {
+                if !bitmap.set_optional(x, y, canvas_val) {
                     return Err(OutOfBounds(x, y));
                 }
             }

src/gui.rs

@@ -24,6 +24,7 @@ const PIXEL_HEIGHT_WITH_SPACERS: usize =
     PIXEL_HEIGHT + NUM_SPACERS * SPACER_HEIGHT;
 
 const OFF_COLOR: u32 = u32::from_ne_bytes([0u8, 0, 0, 0]);
+const SPACER_COLOR: u32 = u32::from_ne_bytes([100u8, 100, 100, 0]);
 
 #[derive(Debug)]
 pub enum AppEvents {
@@ -61,7 +62,7 @@ impl<'t> Gui<'t> {
             if self.options.spacers && tile_y != 0 {
                 // cannot just frame.skip(PIXEL_WIDTH as usize * SPACER_HEIGHT as usize) because of typing
                 for _ in 0..PIXEL_WIDTH * SPACER_HEIGHT {
-                    frame.next().unwrap();
+                    *frame.next().unwrap() = SPACER_COLOR;
                 }
             }