1 files changed, 154 insertions, 0 deletions
diff --git a/light-client/src/atlas.rs b/light-client/src/atlas.rs
new file mode 100644
index 00000000..e75430c5
--- /dev/null
+++ b/light-client/src/atlas.rs
@@ -0,0 +1,154 @@
+use hurrycurry_protocol::{
+    glam::{IVec2, Vec2},
+    ClientGamedata, ItemIndex, TileIndex,
+};
+use sdl2::{
+    pixels::PixelFormatEnum,
+    rect::Rect,
+    render::{Canvas, Texture, TextureAccess, TextureCreator},
+    video::{Window, WindowContext},
+};
+use std::collections::HashMap;
+
+pub struct SpriteRenderer<'a> {
+    texture: Texture<'a>,
+
+    tiles: Vec<Rect>,
+    items: Vec<Rect>,
+
+    view_scale: u32,
+    view_offset: Vec2,
+
+    sprites: Vec<DrawItem>,
+}
+
+pub struct DrawItem {
+    z_order: i32,
+    src: Rect,
+    dst: Rect,
+}
+
+impl<'a> SpriteRenderer<'a> {
+    pub fn init(texture_creator: &'a TextureCreator<WindowContext>) -> Self {
+        let palette = include_str!("../textures/palette.csv")
+            .split('\n')
+            .filter(|l| !l.is_empty())
+            .map(|s| {
+                let mut toks = s.split(",");
+                (
+                    toks.next().unwrap().chars().next().unwrap(),
+                    [
+                        toks.next().unwrap().parse::<u8>().unwrap(),
+                        toks.next().unwrap().parse::<u8>().unwrap(),
+                        toks.next().unwrap().parse::<u8>().unwrap(),
+                        toks.next().unwrap().parse::<u8>().unwrap(),
+                    ],
+                )
+            })
+            .collect::<HashMap<_, _>>();
+
+        let mut texels = vec![255; 1024 * 1024 * 4];
+
+        for (y, line) in include_str!("../textures/atlas.ta").lines().enumerate() {
+            if line.is_empty() {
+                continue;
+            }
+            for (x, char) in line.chars().enumerate() {
+                let color = palette.get(&char).unwrap();
+                let base = (y * 1024 + x) * 4;
+                texels[base..base + 4].copy_from_slice(color);
+            }
+        }
+
+        let mut texture = texture_creator
+            .create_texture(
+                Some(PixelFormatEnum::RGBA8888),
+                TextureAccess::Streaming,
+                1024,
+                1024,
+            )
+            .unwrap();
+
+        texture.update(None, &texels, 1024 * 4).unwrap();
+
+        Self {
+            texture,
+            items: vec![],
+            tiles: vec![],
+            sprites: vec![],
+            view_offset: Vec2::ZERO,
+            view_scale: 32,
+        }
+    }
+
+    pub fn set_sprite_map(&mut self, data: ClientGamedata) {
+        let meta = include_str!("../textures/atlas.meta.csv")
+            .lines()
+            .filter(|l| !l.is_empty())
+            .map(|l| {
+                let mut toks = l.split(",");
+                let x: i32 = toks.next().unwrap().parse().unwrap();
+                let y: i32 = toks.next().unwrap().parse().unwrap();
+                let w: u32 = toks.next().unwrap().parse().unwrap();
+                let h: u32 = toks.next().unwrap().parse().unwrap();
+                let name = toks.next().unwrap().to_string();
+                (name, Rect::new(x, y, w, h))
+            })
+            .collect::<HashMap<_, _>>();
+
+        self.items = data
+            .item_names
+            .iter()
+            .map(|i| meta.get(i).copied().unwrap_or(Rect::new(0, 0, 100, 100)))
+            .collect();
+        self.tiles = data
+            .tile_names
+            .iter()
+            .map(|i| meta.get(i).copied().unwrap_or(Rect::new(0, 0, 100, 100)))
+            .collect();
+    }
+
+    pub fn draw_tile(&mut self, TileIndex(i): TileIndex, position: IVec2) {
+        let p = (self.view_offset.as_ivec2() + position) * self.view_scale as i32;
+        self.sprites.push(DrawItem {
+            z_order: position.y,
+            src: self.tiles[i],
+            dst: Rect::from_center((p.x as i32, p.y as i32), self.view_scale, self.view_scale),
+        });
+    }
+    pub fn draw_item(&mut self, ItemIndex(i): ItemIndex, position: Vec2) {
+        self.sprites.push(DrawItem {
+            z_order: position.y as i32,
+            src: self.tiles[i],
+            dst: Rect::from_center(
+                (position.x as i32, position.y as i32),
+                self.view_scale,
+                self.view_scale,
+            ),
+        })
+    }
+
+    pub fn submit(&mut self, canvas: &mut Canvas<Window>) {
+        self.sprites.sort();
+        for DrawItem { src, dst, .. } in self.sprites.drain(..) {
+            canvas.copy(&self.texture, src, dst).unwrap();
+        }
+    }
+}
+
+impl Ord for DrawItem {
+    fn cmp(&self, other: &Self) -> std::cmp::Ordering {
+        self.z_order.cmp(&other.z_order)
+    }
+}
+impl PartialOrd for DrawItem {
+    fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
+        Some(self.cmp(&other))
+    }
+}
+impl Eq for DrawItem {}
+impl PartialEq for DrawItem {
+    fn eq(&self, other: &Self) -> bool {
+        self.z_order == other.z_order && self.src == other.src && self.dst == other.dst
+    }
+}