Move the palettes to a single constant rather than being repeated

CHANGELOG.md

@@ -20,7 +20,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Many of the places that originally disabled IRQs now use the `sync` module, reducing the chance of missed interrupts.
 - HashMap iterators now implement `size_hint` which should result in slightly better generation of code using those iterators.
 - Transparency of backgrounds is now set once in the toml file rather than once for every image.
-- Palette generation now takes into account every single background a toml definition rather than one at a time.
+- Palette generation now takes into account every single background a toml definition rather than one at a time, you can now find it in the PALETTES constant rather than in every individual image.
 
 ### Fixed
 - Fixed the fast magnitude function in agb_fixnum. This is also used in fast_normalise. Previously only worked for positive (x, y).

agb-image-converter/src/lib.rs

@@ -127,10 +127,15 @@ pub fn include_gfx(input: TokenStream) -> TokenStream {
         ));
     }
 
+    let palette_code =
+        rust_generator::generate_palette_code(&optimisation_results, &config.crate_prefix());
+
     let module = quote! {
         mod #module_name {
             const _: &[u8] = include_bytes!(#include_path);
 
+            #palette_code
+
             #(#image_code)*
         }
     };

agb-image-converter/src/rust_generator.rs

@@ -7,19 +7,13 @@ use quote::{format_ident, quote};
 
 use std::iter;
 
-pub(crate) fn generate_code(
-    output_variable_name: &str,
+pub(crate) fn generate_palette_code(
     results: &Palette16OptimisationResults,
-    image: &Image,
-    image_filename: &str,
-    tile_size: TileSize,
-    crate_prefix: String,
-    assignment_offset: Option<usize>,
+    crate_prefix: &str,
 ) -> TokenStream {
     let crate_prefix = format_ident!("{}", crate_prefix);
-    let output_variable_name = format_ident!("{}", output_variable_name);
 
-    let palette_data = results.optimised_palettes.iter().map(|palette| {
+    let palettes = results.optimised_palettes.iter().map(|palette| {
         let colours = palette
             .clone()
             .into_iter()
@@ -35,6 +29,23 @@ pub(crate) fn generate_code(
         }
     });
 
+    quote! {
+        pub const PALETTES: &[#crate_prefix::display::palette16::Palette16] = &[#(#palettes),*];
+    }
+}
+
+pub(crate) fn generate_code(
+    output_variable_name: &str,
+    results: &Palette16OptimisationResults,
+    image: &Image,
+    image_filename: &str,
+    tile_size: TileSize,
+    crate_prefix: String,
+    assignment_offset: Option<usize>,
+) -> TokenStream {
+    let crate_prefix = format_ident!("{}", crate_prefix);
+    let output_variable_name = format_ident!("{}", output_variable_name);
+
     let (tile_data, assignments) = if let Some(assignment_offset) = assignment_offset {
         let mut tile_data = Vec::new();
 
@@ -68,17 +79,13 @@ pub(crate) fn generate_code(
         pub const #output_variable_name: #crate_prefix::display::tile_data::TileData = {
             const _: &[u8] = include_bytes!(#image_filename);
 
-            const PALETTE_DATA: &[#crate_prefix::display::palette16::Palette16] = &[
-                #(#palette_data),*
-            ];
-
             const TILE_DATA: &[u8] = #data;
 
             const PALETTE_ASSIGNMENT: &[u8] = &[
                 #(#assignments),*
             ];
 
-            #crate_prefix::display::tile_data::TileData::new(PALETTE_DATA, TILE_DATA, PALETTE_ASSIGNMENT)
+            #crate_prefix::display::tile_data::TileData::new(TILE_DATA, PALETTE_ASSIGNMENT)
         };
     }
 }

agb/examples/affine_background.rs

@@ -19,7 +19,7 @@ fn main(mut gba: agb::Gba) -> ! {
 
     let tileset = TileSet::new(affine_tiles::water_tiles.tiles, TileFormat::EightBpp);
 
-    vram.set_background_palettes(affine_tiles::water_tiles.palettes);
+    vram.set_background_palettes(affine_tiles::PALETTES);
 
     let mut bg = gfx.background(Priority::P0, AffineBackgroundSize::Background32x32);
 

agb/examples/animated_background.rs

@@ -18,7 +18,7 @@ fn main(mut gba: agb::Gba) -> ! {
 
     let tileset = TileSet::new(water_tiles::water_tiles.tiles, TileFormat::FourBpp);
 
-    vram.set_background_palettes(water_tiles::water_tiles.palettes);
+    vram.set_background_palettes(water_tiles::PALETTES);
 
     let mut bg = gfx.background(Priority::P0, RegularBackgroundSize::Background32x32);
 

agb/src/display/example_logo.rs

@@ -3,7 +3,7 @@ use super::tiled::{RegularMap, TileFormat, TileSet, TileSetting, TiledMap, VRamM
 crate::include_gfx!("gfx/agb_logo.toml");
 
 pub fn display_logo(map: &mut RegularMap, vram: &mut VRamManager) {
-    vram.set_background_palettes(agb_logo::test_logo.palettes);
+    vram.set_background_palettes(agb_logo::PALETTES);
 
     let background_tilemap = TileSet::new(agb_logo::test_logo.tiles, TileFormat::FourBpp);
 

agb/src/display/tile_data.rs

@@ -1,20 +1,13 @@
-use crate::display::palette16::Palette16;
-
+#[non_exhaustive]
 pub struct TileData {
-    pub palettes: &'static [Palette16],
     pub tiles: &'static [u8],
     pub palette_assignments: &'static [u8],
 }
 
 impl TileData {
     #[must_use]
-    pub const fn new(
-        palettes: &'static [Palette16],
-        tiles: &'static [u8],
-        palette_assignments: &'static [u8],
-    ) -> Self {
+    pub const fn new(tiles: &'static [u8], palette_assignments: &'static [u8]) -> Self {
         TileData {
-            palettes,
             tiles,
             palette_assignments,
         }

examples/hyperspace-roll/src/background.rs

@@ -8,7 +8,7 @@ use crate::sfx::Sfx;
 include_gfx!("gfx/backgrounds.toml");
 
 pub fn load_palettes(vram: &mut VRamManager) {
-    vram.set_background_palettes(backgrounds::stars.palettes);
+    vram.set_background_palettes(backgrounds::PALETTES);
 }
 
 pub(crate) fn load_help_text(
@@ -101,7 +101,7 @@ fn create_background_map(map: &mut RegularMap, vram: &mut VRamManager, stars_til
 
 pub fn show_title_screen(background: &mut RegularMap, vram: &mut VRamManager, sfx: &mut Sfx) {
     background.set_scroll_pos((0i16, 0).into());
-    vram.set_background_palettes(backgrounds::title.palettes);
+    vram.set_background_palettes(backgrounds::PALETTES);
     let tile_set = TileSet::new(
         backgrounds::title.tiles,
         agb::display::tiled::TileFormat::FourBpp,

examples/the-hat-chooses-the-wizard/src/main.rs

@@ -785,7 +785,7 @@ fn agb_main(mut gba: agb::Gba) -> ! {
 
 pub fn main(mut agb: agb::Gba) -> ! {
     let (tiled, mut vram) = agb.display.video.tiled0();
-    vram.set_background_palettes(tile_sheet::background.palettes);
+    vram.set_background_palettes(tile_sheet::PALETTES);
     let mut splash_screen = tiled.background(Priority::P0, RegularBackgroundSize::Background32x32);
     let mut world_display = tiled.background(Priority::P0, RegularBackgroundSize::Background32x32);
 
@@ -817,7 +817,7 @@ pub fn main(mut agb: agb::Gba) -> ! {
         world_display.commit(&mut vram);
         world_display.show();
 
-        vram.set_background_palettes(tile_sheet::background.palettes);
+        vram.set_background_palettes(tile_sheet::PALETTES);
 
         let object = agb.display.object.get();
         let mut mixer = agb.mixer.mixer();

examples/the-hat-chooses-the-wizard/src/splash_screen.rs

@@ -19,20 +19,13 @@ pub fn show_splash_screen(
     vram: &mut VRamManager,
 ) {
     map.set_scroll_pos((0i16, 0i16).into());
-    let (tileset, palette) = match which {
-        SplashScreen::Start => {
-            let tileset = TileSet::new(splash_screens::splash.tiles, TileFormat::FourBpp);
+    let tileset = match which {
+        SplashScreen::Start => TileSet::new(splash_screens::splash.tiles, TileFormat::FourBpp),
 
-            (tileset, splash_screens::splash.palettes)
-        }
-        SplashScreen::End => {
-            let tileset = TileSet::new(
+        SplashScreen::End => TileSet::new(
             splash_screens::thanks_for_playing.tiles,
             TileFormat::FourBpp,
-            );
-
-            (tileset, splash_screens::thanks_for_playing.palettes)
-        }
+        ),
     };
 
     let vblank = agb::interrupt::VBlank::get();
@@ -77,7 +70,7 @@ pub fn show_splash_screen(
     }
 
     map.commit(vram);
-    vram.set_background_palettes(palette);
+    vram.set_background_palettes(splash_screens::PALETTES);
     map.show();
 
     loop {

examples/the-purple-night/src/main.rs

@@ -2146,7 +2146,7 @@ impl<'a> Game<'a> {
     }
 
     fn update_sunrise(vram: &mut VRamManager, time: u16) {
-        let mut modified_palette = background::background.palettes[0].clone();
+        let mut modified_palette = background::PALETTES[0].clone();
 
         let a = modified_palette.colour(0);
         let b = modified_palette.colour(1);
@@ -2160,7 +2160,7 @@ impl<'a> Game<'a> {
     }
 
     fn update_fade_out(vram: &mut VRamManager, time: u16) {
-        let mut modified_palette = background::background.palettes[0].clone();
+        let mut modified_palette = background::PALETTES[0].clone();
 
         let c = modified_palette.colour(2);
 
@@ -2216,7 +2216,7 @@ fn game_with_level(gba: &mut agb::Gba) {
     loop {
         let (background, mut vram) = gba.display.video.tiled0();
 
-        vram.set_background_palettes(background::background.palettes);
+        vram.set_background_palettes(background::PALETTES);
 
         let tileset = TileSet::new(background::background.tiles, TileFormat::FourBpp);