changed tilemap to background

examples/basic.rs

@@ -6,8 +6,8 @@ struct Game {}
 fn init(gsa: &mut Gsa) -> Game {
     gsa.sprites[0].tile = 0x0300;
     gsa.sprites[1].tile = 0x0200;
-    gsa.maps[0].tiles[1][1] = 0x0300;
+    gsa.bgs[0].tiles[1][1] = 0x0300;
-    gsa.maps[1].half_tile = true;
+    gsa.bgs[1].half_tile = true;
     gsa.write_string(1, IVec2::ONE, "Hello world nyaa~");
     Game {}
 }
@@ -15,7 +15,7 @@ fn init(gsa: &mut Gsa) -> Game {
 fn update(_game: &mut Game, gsa: &mut Gsa) {
     gsa.sprites[0].pos.x = (gsa.sprites[0].pos.x + 1) % 300;
     gsa.sprites[1].pos += gsa.input_dir();
-    gsa.maps[1].scroll.x += 1;
+    gsa.bgs[1].scroll.x += 1;
     if gsa.button_pressed(FACE_DOWN) {
         gsa.sprites[1].tile += 1;
     }

src/background.rs

@@ -1,9 +1,9 @@
-use crate::TILEMAP_MAX_SIZE;
+use crate::BACKGROUND_MAX_SIZE;
 use glam::IVec2;
 
 /// Tilemap which will be rendered on screen
-pub struct Tilemap {
+pub struct Background {
-    /// Tiles in idx, accessible via \[x\]\[y\], x and y 0..[TILEMAP_MAX_SIZE]
+    /// Tiles in idx, accessible via \[x\]\[y\], x and y 0..[BACKGROUND_MAX_SIZE]
     pub tiles: Vec<Vec<u16>>,
     /// Camera scroll (negative draw offset) for rendering
     pub scroll: IVec2,
@@ -11,10 +11,10 @@ pub struct Tilemap {
     pub half_tile: bool,
 }
 
-impl Default for Tilemap {
+impl Default for Background {
     fn default() -> Self {
-        let row = vec![0u16; TILEMAP_MAX_SIZE];
+        let row = vec![0u16; BACKGROUND_MAX_SIZE];
-        let tiles = vec![row; TILEMAP_MAX_SIZE];
+        let tiles = vec![row; BACKGROUND_MAX_SIZE];
         Self {
             tiles,
             scroll: IVec2::ZERO,

src/gsa.rs

@@ -1,8 +1,9 @@
+use crate::background::Background;
 use crate::rgb::Rgb;
 use crate::sprite::Sprite;
-use crate::tilemap::Tilemap;
 use crate::{
-    Buttons, DPAD_DOWN, DPAD_LEFT, DPAD_RIGHT, DPAD_UP, MAX_SPRITES, MAX_TILEMAPS, TILEMAP_MAX_SIZE,
+    Buttons, BACKGROUND_MAX_SIZE, DPAD_DOWN, DPAD_LEFT, DPAD_RIGHT, DPAD_UP, MAX_BACKGROUNDS,
+    MAX_SPRITES,
 };
 use ascii::{AsciiChar, AsciiStr};
 use glam::IVec2;
@@ -16,7 +17,7 @@ pub struct Gsa {
     pub palette: [Rgb; 256],
 
     /// Tilemap layers available
-    pub maps: [Tilemap; MAX_TILEMAPS],
+    pub bgs: [Background; MAX_BACKGROUNDS],
 
     /// Currently selected font
     ///
@@ -36,9 +37,9 @@ impl Gsa {
 
     /// Sets all tiles of map to val
     pub fn fill_map(&mut self, map: usize, val: u16) {
-        for x in 0..TILEMAP_MAX_SIZE {
+        for x in 0..BACKGROUND_MAX_SIZE {
-            for y in 0..TILEMAP_MAX_SIZE {
+            for y in 0..BACKGROUND_MAX_SIZE {
-                self.maps[map].tiles[x][y] = val;
+                self.bgs[map].tiles[x][y] = val;
             }
         }
     }
@@ -72,7 +73,7 @@ impl Gsa {
     pub fn write_string(&mut self, map: usize, pos: IVec2, str: &str) {
         let str = AsciiStr::from_ascii(str).unwrap();
         for (i, ch) in str.into_iter().enumerate() {
-            self.maps[map].tiles[pos.x as usize + i][pos.y as usize] = self.get_char_tile(*ch);
+            self.bgs[map].tiles[pos.x as usize + i][pos.y as usize] = self.get_char_tile(*ch);
         }
     }
 

src/gsa_render_to_screen.rs

@@ -1,6 +1,6 @@
 use crate::{
-    Gsa, Rgb, Tilemap, HALF_TILE_SIZE, MAX_TILEMAPS, SCREEN_HEIGHT, SCREEN_WIDTH, TILEMAP_MAX_SIZE,
+    Background, Gsa, Rgb, BACKGROUND_MAX_SIZE, HALF_TILE_SIZE, MAX_BACKGROUNDS, SCREEN_HEIGHT,
-    TILESET_SIZE, TILE_SIZE,
+    SCREEN_WIDTH, TILESET_SIZE, TILE_SIZE,
 };
 use glam::IVec2;
 use softbuffer::Buffer;
@@ -24,7 +24,7 @@ fn draw_tile(target: &mut [u8], pos: IVec2, tile: u16, tileset: &[u8], half: boo
     }
 }
 
-fn render_map(target: &mut [u8], map: &Tilemap, tileset: &[u8]) {
+fn render_map(target: &mut [u8], map: &Background, tileset: &[u8]) {
     let tcmult = if map.half_tile { 2 } else { 1 };
     let tilesize = if map.half_tile {
         HALF_TILE_SIZE
@@ -33,8 +33,8 @@ fn render_map(target: &mut [u8], map: &Tilemap, tileset: &[u8]) {
     } as i32;
     let mut startx = map.scroll.x / tilesize;
     let mut starty = map.scroll.y / tilesize;
-    let endx = (TILEMAP_MAX_SIZE as i32).min(startx + 20 * tcmult);
+    let endx = (BACKGROUND_MAX_SIZE as i32).min(startx + 20 * tcmult);
-    let endy = (TILEMAP_MAX_SIZE as i32).min(starty + 12 * tcmult);
+    let endy = (BACKGROUND_MAX_SIZE as i32).min(starty + 12 * tcmult);
     startx = 0.max(startx);
     starty = 0.max(starty);
     for x in startx..endx {
@@ -57,8 +57,8 @@ fn render_map(target: &mut [u8], map: &Tilemap, tileset: &[u8]) {
 }
 
 pub(crate) fn render_to_screen(target: &mut [u8], gsa: &Gsa, tileset: &[u8]) {
-    for i in 0..MAX_TILEMAPS {
+    for i in 0..MAX_BACKGROUNDS {
-        render_map(target, &gsa.maps[i], tileset);
+        render_map(target, &gsa.bgs[i], tileset);
         for sprite in &gsa.sprites {
             if sprite.tile > 0 && sprite.priority == i as u8 {
                 draw_tile(target, sprite.pos, sprite.tile, tileset, false);

src/lib.rs

@@ -9,10 +9,10 @@
 //! - Tilesize: 16x16 (or 8x8 for half-tiles)
 //! - Tileset: 65536 tiles, indexed via 0xYYXX
 //! - Sprites: 256 of size 16x16 (pondering allowing larger sprites)
-//! - Tilemaps: 4 of size 1024x1024, scrollable
+//! - Backgrounds: 4 of size 1024x1024, scrollable
 //!
 //! ## Features not yet implemented
-//! - Tilemap effects
+//! - Background effects
 //!   - Rotation? Scaling?
 //!   - Mosaic?
 //!   - Mode7?
@@ -27,21 +27,21 @@
 //!   - Gamepad text keyboard input
 //!   - Menus
 
+mod background;
 mod buttons;
 mod gsa;
 mod gsa_render_to_screen;
 mod rgb;
 mod run;
 mod sprite;
-mod tilemap;
 mod tileset;
 
+pub use crate::background::*;
 pub use crate::buttons::*;
 pub use crate::gsa::*;
 pub use crate::rgb::*;
 pub use crate::run::run;
 pub use crate::sprite::*;
-pub use crate::tilemap::*;
 
 /// Amount of sprites in [Gsa::sprites]
 pub const MAX_SPRITES: usize = 0xff;
@@ -52,8 +52,8 @@ pub const SCREEN_WIDTH: usize = 304;
 /// Screen Height in pixels
 pub const SCREEN_HEIGHT: usize = 176;
 
-/// X and y dimensions of maps in [Gsa::maps]
+/// X and y dimensions of maps in [Gsa::bgs]
-pub const TILEMAP_MAX_SIZE: usize = 1024;
+pub const BACKGROUND_MAX_SIZE: usize = 1024;
 
 /// Width and height (in tiles) of tileset
 pub const TILESET_SIZE: usize = 0x100;
@@ -64,5 +64,5 @@ pub const TILE_SIZE: usize = 16;
 /// Width and height of a tile in half-tile mode
 pub const HALF_TILE_SIZE: usize = 8;
 
-/// Amount of tile maps in [Gsa::maps]
+/// Amount of tile maps in [Gsa::bgs]
-pub const MAX_TILEMAPS: usize = 4;
+pub const MAX_BACKGROUNDS: usize = 4;

src/run.rs

@@ -39,7 +39,7 @@ pub fn run<TGame: 'static>(
 
     let mut gsa = Gsa {
         sprites: [Sprite::default(); MAX_SPRITES],
-        maps: Default::default(),
+        bgs: Default::default(),
         palette,
         font: 0x1010,
         pressed: 0,