1 files changed, 74 insertions, 0 deletions
diff --git a/src/state.rs b/src/state.rs
new file mode 100644
index 0000000..db17ee8
--- /dev/null
+++ b/src/state.rs
@@ -0,0 +1,74 @@
+use ggez::event::{EventHandler, KeyCode, KeyMods};
+use ggez::graphics::{self, spritebatch::SpriteBatch, DrawParam, FilterMode, Image};
+use ggez::nalgebra::{Point2, Vector2};
+use ggez::{filesystem, Context, GameResult};
+
+use crate::constants;
+use crate::map::Map;
+use crate::tileset::Tileset;
+
+pub struct State {
+    map: Map,
+    tileset: Tileset,
+    spritebatch: SpriteBatch,
+    camera_point: (f32, f32),
+}
+
+impl State {
+    pub fn new(context: &mut Context) -> GameResult<State> {
+        let mut image = Image::new(context, "/tileset.png")?;
+        image.set_filter(FilterMode::Nearest);
+
+        Ok(State {
+            map: Map::new(filesystem::open(context, "/map.tmx")?),
+            tileset: Tileset::new(filesystem::open(context, "/tileset.tsx")?),
+            spritebatch: SpriteBatch::new(image),
+            camera_point: (0.0, 0.0),
+        })
+    }
+}
+
+impl EventHandler for State {
+    fn update(&mut self, _: &mut Context) -> GameResult {
+        Ok(())
+    }
+
+    fn draw(&mut self, context: &mut Context) -> GameResult {
+        graphics::clear(context, graphics::BLACK);
+
+        for layer in self.map.layers.iter() {
+            for x in 0..self.map.width {
+                for y in 0..self.map.height {
+                    let draw_param = DrawParam::default()
+                        .src(self.tileset.tiles[layer.data[x + (y * self.map.height)]])
+                        .dest(Point2::new(
+                            self.tileset.tile_width * constants::TILE_SCALE * x as f32,
+                            self.tileset.tile_height * constants::TILE_SCALE * y as f32,
+                        ))
+                        .scale(Vector2::new(constants::TILE_SCALE, constants::TILE_SCALE));
+
+                    self.spritebatch.add(draw_param);
+                }
+            }
+        }
+
+        let draw_param =
+            DrawParam::default().dest(Point2::new(self.camera_point.0, self.camera_point.1));
+
+        graphics::draw(context, &self.spritebatch, draw_param)?;
+        self.spritebatch.clear();
+
+        graphics::present(context)?;
+        Ok(())
+    }
+
+    fn key_down_event(&mut self, _: &mut Context, keycode: KeyCode, _: KeyMods, _: bool) {
+        match keycode {
+            KeyCode::W => self.camera_point.1 += constants::CAMERA_MOVE,
+            KeyCode::A => self.camera_point.0 += constants::CAMERA_MOVE,
+            KeyCode::S => self.camera_point.1 -= constants::CAMERA_MOVE,
+            KeyCode::D => self.camera_point.0 -= constants::CAMERA_MOVE,
+            _ => (),
+        }
+    }
+}