From ba785f8525f4043fcc94f51a1be5098701d6a5e5 Mon Sep 17 00:00:00 2001
From: dani <>
Date: Mon, 14 Aug 2023 17:43:47 +0000
Subject: [PATCH] refactor

---
 CHANGLOG.md                  |   1 +
 Cargo.toml                   |   1 +
 examples/basic/gfx.gif       | Bin 29133 -> 29134 bytes
 examples/hello_world/main.rs |   4 +-
 src/background.rs            |  18 ++-
 src/gsa.rs                   |  59 +++++-----
 src/mapedit.rs               | 210 ++++++++++++++++++++++-------------
 7 files changed, 181 insertions(+), 112 deletions(-)

diff --git a/CHANGLOG.md b/CHANGLOG.md
index 0eeb789..80c6ee7 100644
--- a/CHANGLOG.md
+++ b/CHANGLOG.md
@@ -1,5 +1,6 @@
 # 0.3.0
 - added size to backgrounds
+- refactored api, background functions are now methods to background rather than gsa
 
 # 0.2.1 - 2023-07-27
 - fixed missing dependency in scaffolding
diff --git a/Cargo.toml b/Cargo.toml
index d5af3a5..20db143 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -24,6 +24,7 @@ dunce = "1.0.4"
 path-slash = "0.2.1"
 serde = {version = "1.0.181", features = ["derive"]}
 postcard = {version = "1.0.6", features = ["alloc"]}
+#rayon = "1.7.0"
 
 [profile.release-dani]
 inherits = "release"
diff --git a/examples/basic/gfx.gif b/examples/basic/gfx.gif
index cec71effa79fc4abe3d6800eb7b291197ad102d1..e1d5c1052d1f608eeb0891d63e4995c10dcbac70 100644
GIT binary patch
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diff --git a/examples/hello_world/main.rs b/examples/hello_world/main.rs
index 720d612..197fc7d 100644
--- a/examples/hello_world/main.rs
+++ b/examples/hello_world/main.rs
@@ -4,13 +4,13 @@ use gsa::{run, Gsa};
 struct Game {}
 
 fn init(gsa: &mut Gsa) -> Game {
-    gsa.sprites[0].tile = 0;
+    gsa.sprite[0].tile = 0;
     gsa.write_string(3, IVec2 { x: 10, y: 10 }, "Hello World, nyaa~");
     Game {}
 }
 
 fn update(_game: &mut Game, gsa: &mut Gsa) {
-    gsa.sprites[0].pos += gsa.input_dir();
+    gsa.sprite[0].pos += gsa.input_dir();
 }
 
 run!(init, update);
diff --git a/src/background.rs b/src/background.rs
index f8bacb5..ed37da0 100644
--- a/src/background.rs
+++ b/src/background.rs
@@ -1,4 +1,4 @@
-use crate::BACKGROUND_MAX_SIZE;
+use crate::{BACKGROUND_MAX_SIZE, EMPTY_TILE};
 use glam::IVec2;
 
 /// Tilemap which will be rendered on screen
@@ -28,3 +28,19 @@ impl Default for Background {
         }
     }
 }
+
+impl Background {
+    /// Clears all tiles of given bg
+    pub fn clear(&mut self) {
+        self.fill(EMPTY_TILE);
+    }
+
+    /// Sets all tiles to val
+    pub fn fill(&mut self, val: u16) {
+        for x in 0..BACKGROUND_MAX_SIZE {
+            for y in 0..BACKGROUND_MAX_SIZE {
+                self.tiles[x][y] = val;
+            }
+        }
+    }
+}
diff --git a/src/gsa.rs b/src/gsa.rs
index d879895..1112322 100644
--- a/src/gsa.rs
+++ b/src/gsa.rs
@@ -13,19 +13,22 @@ use glam::IVec2;
 /// Complete state of GSA
 pub struct Gsa {
     /// Sprites available
-    pub sprites: [Sprite; MAX_SPRITES],
+    pub sprite: [Sprite; MAX_SPRITES],
 
     /// Palette used to draw graphics, initially loaded from gfx.gif
     pub palette: [Rgb; 256],
 
     /// Tilemap layers available, layer 0 in the back, layer 3 in front; layer 3 defaults to half-tile mode
-    pub bgs: [Background; MAX_BACKGROUNDS],
+    pub bg: [Background; MAX_BACKGROUNDS],
 
     /// Currently selected font
     ///
     /// Chosen as half-size tile index, extends 16x16 half tiles in x and y
     pub font: u16,
 
+    /// Target BG for string functions, defaults to layer 3
+    pub str_bg: usize,
+
     pub(crate) pressed: Buttons,
     pub(crate) released: Buttons,
     pub(crate) down: Buttons,
@@ -33,47 +36,33 @@ pub struct Gsa {
 }
 
 impl Gsa {
-    /// Clears all tiles of given bg
-    pub fn clear_bg(&mut self, bg: usize) {
-        self.fill_bg(bg, EMPTY_TILE);
-    }
-
     /// Resets all bg
     pub fn reset_bgs(&mut self) {
         for bg in 0..MAX_BACKGROUNDS {
-            self.clear_bg(bg);
-            self.bgs[bg].scroll = IVec2::ZERO;
-            self.bgs[bg].half_tile = false;
+            self.bg[bg].clear();
+            self.bg[bg].scroll = IVec2::ZERO;
+            self.bg[bg].half_tile = false;
         }
         //todo: document ui layer defaulting to half tile
-        self.bgs[3].half_tile = true;
+        self.bg[3].half_tile = true;
     }
 
     /// Clears all sprites
     pub fn reset_sprites(&mut self) {
         for sprite in 0..MAX_SPRITES {
-            self.sprites[sprite].pos = IVec2::ZERO;
-            self.sprites[sprite].tile = EMPTY_TILE;
-            self.sprites[sprite].priority = 0;
-        }
-    }
-
-    /// Sets all tiles of bg to val
-    pub fn fill_bg(&mut self, bg: usize, val: u16) {
-        for x in 0..BACKGROUND_MAX_SIZE {
-            for y in 0..BACKGROUND_MAX_SIZE {
-                self.bgs[bg].tiles[x][y] = val;
-            }
+            self.sprite[sprite].pos = IVec2::ZERO;
+            self.sprite[sprite].tile = EMPTY_TILE;
+            self.sprite[sprite].priority = 0;
         }
     }
 
     /// Loads tilemap into backgrounds from id
     pub fn load_map(&mut self, map: u16) {
         for (i, map) in self.maps.maps[&map].iter().enumerate() {
-            self.bgs[i].size = map.size;
+            self.bg[i].size = map.size;
             for y in 0..map.size.y as usize {
                 for x in 0..map.size.x as usize {
-                    self.bgs[i].tiles[x][y] = map.data[x + y * map.size.x as usize]
+                    self.bg[i].tiles[x][y] = map.data[x + y * map.size.x as usize]
                 }
             }
         }
@@ -84,9 +73,9 @@ impl Gsa {
         self.maps.maps.insert(
             map,
             [
-                Tilemap::from_bg(&self.bgs[0]),
-                Tilemap::from_bg(&self.bgs[1]),
-                Tilemap::from_bg(&self.bgs[2]),
+                Tilemap::from_bg(&self.bg[0]),
+                Tilemap::from_bg(&self.bg[1]),
+                Tilemap::from_bg(&self.bg[2]),
             ],
         );
     }
@@ -122,10 +111,20 @@ impl Gsa {
     }
 
     /// Write given string on given map, at given position, with font [Gsa::font]
-    pub fn write_string(&mut self, map: usize, pos: IVec2, str: &str) {
+    pub fn write_string(&mut self, pos: IVec2, str: &str) {
         let str = AsciiStr::from_ascii(str).unwrap();
         for (i, ch) in str.into_iter().enumerate() {
-            self.bgs[map].tiles[pos.x as usize + i][pos.y as usize] = self.get_char_tile(*ch);
+            self.bg[self.str_bg].tiles[pos.x as usize + i][pos.y as usize] =
+                self.get_char_tile(*ch);
+        }
+    }
+
+    /// Write given string vertically on given map, at given position, with font [Gsa::font]
+    pub fn write_string_vertical(&mut self, pos: IVec2, str: &str) {
+        let str = AsciiStr::from_ascii(str).unwrap();
+        for (i, ch) in str.into_iter().enumerate() {
+            self.bg[self.str_bg].tiles[pos.x as usize][pos.y as usize + i] =
+                self.get_char_tile(*ch);
         }
     }
 
diff --git a/src/mapedit.rs b/src/mapedit.rs
index ed1fa9b..294988e 100644
--- a/src/mapedit.rs
+++ b/src/mapedit.rs
@@ -125,13 +125,12 @@ impl Background {
 }
 
 fn draw_input_window(gsa: &mut Gsa, pos: IVec2, caption: &str) {
-    gsa.bgs[2].draw_frame(pos, IVec2 { x: 7, y: 5 });
-    gsa.bgs[2].tiles[pos.x as usize + 3][pos.y as usize + 1] = TILE_INPUT;
-    gsa.bgs[2].tiles[pos.x as usize + 4][pos.y as usize + 1] = TILE_INPUT;
-    gsa.bgs[2].tiles[pos.x as usize + 1][pos.y as usize + 3] = TILE_BUT_YES;
-    gsa.bgs[2].tiles[pos.x as usize + 5][pos.y as usize + 3] = TILE_BUT_NO;
+    gsa.bg[2].draw_frame(pos, IVec2 { x: 7, y: 5 });
+    gsa.bg[2].tiles[pos.x as usize + 3][pos.y as usize + 1] = TILE_INPUT;
+    gsa.bg[2].tiles[pos.x as usize + 4][pos.y as usize + 1] = TILE_INPUT;
+    gsa.bg[2].tiles[pos.x as usize + 1][pos.y as usize + 3] = TILE_BUT_YES;
+    gsa.bg[2].tiles[pos.x as usize + 5][pos.y as usize + 3] = TILE_BUT_NO;
     gsa.write_string(
-        3,
         IVec2 {
             x: pos.x * 2 + 2,
             y: pos.y * 2 + 1,
@@ -139,7 +138,6 @@ fn draw_input_window(gsa: &mut Gsa, pos: IVec2, caption: &str) {
         caption,
     );
     gsa.write_string(
-        3,
         IVec2 {
             x: pos.x * 2 + 3,
             y: pos.y * 2 + 3,
@@ -150,7 +148,6 @@ fn draw_input_window(gsa: &mut Gsa, pos: IVec2, caption: &str) {
 
 fn update_input_window(gsa: &mut Gsa, pos: IVec2, val: u16) {
     gsa.write_string(
-        3,
         IVec2 {
             x: pos.x * 2 + 6,
             y: pos.y * 2 + 3,
@@ -159,68 +156,105 @@ fn update_input_window(gsa: &mut Gsa, pos: IVec2, val: u16) {
     );
 }
 
-fn set_state(state: State, gsa1: &mut Gsa, gsa2: &mut Gsa, current_layer: usize, all_layers: bool) {
+fn set_state(
+    state: State,
+    gsa1: &mut Gsa,
+    gsa2: &mut Gsa,
+    current_layer: usize,
+    all_layers: bool,
+    current_map: u16,
+) {
     match state {
         State::Edit => {
             //update editing layers
             if all_layers {
-                gsa1.bgs[0].active = true;
-                gsa1.bgs[1].active = true;
-                gsa1.bgs[2].active = true;
+                gsa1.bg[0].active = true;
+                gsa1.bg[1].active = true;
+                gsa1.bg[2].active = true;
             } else {
-                gsa1.bgs[0].active = current_layer == 0;
-                gsa1.bgs[1].active = current_layer == 1;
-                gsa1.bgs[2].active = current_layer == 2;
+                gsa1.bg[0].active = current_layer == 0;
+                gsa1.bg[1].active = current_layer == 1;
+                gsa1.bg[2].active = current_layer == 2;
             }
-            gsa2.clear_bg(2);
-            gsa2.clear_bg(3);
-            draw_toolbar(gsa1, gsa2, current_layer, all_layers);
+            gsa2.bg[2].clear();
+            gsa2.bg[2].clear();
+            draw_toolbar(gsa1, gsa2, current_layer, all_layers, current_map);
 
-            gsa2.bgs[0].active = false;
-            gsa2.bgs[1].active = false;
-            gsa1.sprites[SPR_CURSOR].priority = 3;
-            gsa1.sprites[SPR_CURSOR].tile = TILE_CURSOR;
-            gsa2.sprites[SPR_CURSOR].tile = EMPTY_TILE;
+            gsa2.bg[0].active = false;
+            gsa2.bg[1].active = false;
+            gsa1.sprite[SPR_CURSOR].priority = 3;
+            gsa1.sprite[SPR_CURSOR].tile = TILE_CURSOR;
+            gsa2.sprite[SPR_CURSOR].tile = EMPTY_TILE;
         }
         State::SelectTile => {
-            draw_toolbar(gsa1, gsa2, current_layer, all_layers);
-            gsa1.bgs[0].active = false;
-            gsa1.bgs[1].active = false;
-            gsa1.bgs[2].active = false;
-            gsa2.bgs[0].active = true;
-            gsa2.bgs[1].active = true;
-            gsa1.sprites[SPR_CURSOR].tile = EMPTY_TILE;
-            gsa2.sprites[SPR_CURSOR].tile = TILE_CURSOR;
+            draw_toolbar(gsa1, gsa2, current_layer, all_layers, current_map);
+            gsa1.bg[0].active = false;
+            gsa1.bg[1].active = false;
+            gsa1.bg[2].active = false;
+            gsa2.bg[0].active = true;
+            gsa2.bg[1].active = true;
+            gsa1.sprite[SPR_CURSOR].tile = EMPTY_TILE;
+            gsa2.sprite[SPR_CURSOR].tile = TILE_CURSOR;
         }
         State::NewMapDialog => {
-            gsa1.bgs[0].active = false;
-            gsa1.bgs[1].active = false;
-            gsa1.bgs[2].active = false;
-            gsa2.bgs[0].active = false;
-            gsa2.bgs[1].active = false;
-            gsa1.sprites[SPR_CURSOR].tile = EMPTY_TILE;
-            gsa2.sprites[SPR_CURSOR].tile = EMPTY_TILE;
+            gsa1.bg[0].active = false;
+            gsa1.bg[1].active = false;
+            gsa1.bg[2].active = false;
+            gsa2.bg[0].active = false;
+            gsa2.bg[1].active = false;
+            gsa1.sprite[SPR_CURSOR].tile = EMPTY_TILE;
+            gsa2.sprite[SPR_CURSOR].tile = EMPTY_TILE;
             draw_input_window(gsa2, IVec2 { x: 15, y: 9 }, "Create Map");
         }
     }
 }
 
-fn draw_toolbar(gsa1: &mut Gsa, gsa2: &mut Gsa, current_layer: usize, all_layers: bool) {
+fn draw_toolbar(
+    gsa1: &mut Gsa,
+    gsa2: &mut Gsa,
+    current_layer: usize,
+    all_layers: bool,
+    current_map: u16,
+) {
     for y in 0..BACKGROUND_MAX_SIZE {
-        gsa2.bgs[2].tiles[0][y] = 0x7010;
+        gsa2.bg[2].tiles[0][y] = 0x7010;
     }
-    gsa2.bgs[2].tiles[0][BUT_SAVE] = 0x7211;
-    gsa2.bgs[2].tiles[0][BUT_CREATE] = TILE_BUT_CREATE;
-    gsa2.bgs[2].tiles[0][BUT_EXIT] = 0x7212;
+    gsa2.bg[2].tiles[0][BUT_SAVE] = 0x7211;
+    gsa2.bg[2].tiles[0][BUT_CREATE] = TILE_BUT_CREATE;
+    gsa2.bg[2].tiles[0][BUT_EXIT] = 0x7212;
 
     //layer buttons
-    gsa2.bgs[2].tiles[0][BUT_LAYER1] = if current_layer == 0 { 0x7111 } else { 0x7011 };
-    gsa2.bgs[2].tiles[0][BUT_LAYER2] = if current_layer == 1 { 0x7112 } else { 0x7012 };
-    gsa2.bgs[2].tiles[0][BUT_LAYER3] = if current_layer == 2 { 0x7113 } else { 0x7013 };
-    gsa2.bgs[2].tiles[0][BUT_LAYERS] = if all_layers { 0x7114 } else { 0x7014 };
+    gsa2.bg[2].tiles[0][BUT_LAYER1] = if current_layer == 0 { 0x7111 } else { 0x7011 };
+    gsa2.bg[2].tiles[0][BUT_LAYER2] = if current_layer == 1 { 0x7112 } else { 0x7012 };
+    gsa2.bg[2].tiles[0][BUT_LAYER3] = if current_layer == 2 { 0x7113 } else { 0x7013 };
+    gsa2.bg[2].tiles[0][BUT_LAYERS] = if all_layers { 0x7114 } else { 0x7014 };
 
-    gsa2.bgs[2].size = IVec2 { x: 120, y: 68 }; //enough to cover 4k monitors? <_<
-    gsa2.bgs[3].size = IVec2 { x: 240, y: 136 };
+    gsa2.bg[2].size = IVec2 { x: 120, y: 68 }; //enough to cover 4k monitors? <_<
+    gsa2.bg[3].size = IVec2 { x: 240, y: 136 };
+
+    gsa2.write_string_vertical(
+        IVec2 {
+            x: 0,
+            y: BUT_EXIT as i32 * 2 + 3,
+        },
+        &format!("MAP-{:04X}", current_map),
+    );
+
+    gsa2.write_string_vertical(
+        IVec2 {
+            x: 0,
+            y: BUT_EXIT as i32 * 2 + 12,
+        },
+        &format!("W-{}", gsa1.bg[0].size.x),
+    );
+
+    gsa2.write_string_vertical(
+        IVec2 {
+            x: 1,
+            y: BUT_EXIT as i32 * 2 + 12,
+        },
+        &format!("H-{}", gsa1.bg[0].size.y),
+    );
 }
 
 pub(crate) fn run_mapedit() {
@@ -237,14 +271,15 @@ pub(crate) fn run_mapedit() {
     };
 
     let mut gsa1 = Gsa {
-        sprites: [Sprite::default(); MAX_SPRITES],
+        sprite: [Sprite::default(); MAX_SPRITES],
         palette,
-        bgs: Default::default(),
+        bg: Default::default(),
         font: FONT_BOLD,
         pressed: 0,
         released: 0,
         down: 0,
         maps,
+        str_bg: 3,
     };
 
     gsa1.reset_bgs();
@@ -255,26 +290,27 @@ pub(crate) fn run_mapedit() {
     }
 
     for i in 0..3 {
-        gsa1.bgs[i].scroll = IVec2 {
+        gsa1.bg[i].scroll = IVec2 {
             x: -16 - 32,
             y: -32,
         };
     }
 
     let mut gsa2 = Gsa {
-        sprites: [Sprite::default(); MAX_SPRITES],
+        sprite: [Sprite::default(); MAX_SPRITES],
         palette,
-        bgs: Default::default(),
+        bg: Default::default(),
         font: FONT_BOLD,
         pressed: 0,
         released: 0,
         down: 0,
         maps: Maps::default(),
+        str_bg: 3,
     };
     gsa2.reset_bgs();
     gsa2.reset_sprites();
     for i in 0..2 {
-        gsa2.bgs[i].scroll = IVec2 {
+        gsa2.bg[i].scroll = IVec2 {
             x: -16 - 32,
             y: -32,
         };
@@ -282,7 +318,7 @@ pub(crate) fn run_mapedit() {
 
     for y in 0..TILESET_SIZE {
         for x in 0..TILESET_SIZE {
-            gsa2.bgs[0].tiles[x][y] = (x + (y << 8)) as u16;
+            gsa2.bg[0].tiles[x][y] = (x + (y << 8)) as u16;
         }
     }
     //draw_input_window(&mut gsa2, IVec2 { x: 5, y: 3 }, "Create Map");
@@ -308,13 +344,20 @@ pub(crate) fn run_mapedit() {
     let mut middle_down = false;
     let mut right_down = false;
     let mut selected_tile = IVec2::ZERO;
-    gsa2.bgs[1].tiles[0][0] = TILE_MARKER;
+    gsa2.bg[1].tiles[0][0] = TILE_MARKER;
     let mut current_layer = 0usize;
     let mut all_layers = true;
     let mut state = State::Edit;
     let mut input_buf = 0u16;
     let mut current_map = 0;
-    set_state(State::Edit, &mut gsa1, &mut gsa2, current_layer, all_layers);
+    set_state(
+        State::Edit,
+        &mut gsa1,
+        &mut gsa2,
+        current_layer,
+        all_layers,
+        current_map,
+    );
 
     event_loop.run(move |event, _, control_flow| {
         let mouse_pos = &mut mouse_pos;
@@ -347,6 +390,7 @@ pub(crate) fn run_mapedit() {
                                     &mut gsa2,
                                     *current_layer,
                                     *all_layers,
+                                    *current_map,
                                 );
                             } else {
                                 *state = State::Edit;
@@ -356,6 +400,7 @@ pub(crate) fn run_mapedit() {
                                     &mut gsa2,
                                     *current_layer,
                                     *all_layers,
+                                    *current_map,
                                 );
                             }
                         }
@@ -409,6 +454,7 @@ pub(crate) fn run_mapedit() {
                                         &mut gsa2,
                                         *current_layer,
                                         *all_layers,
+                                        *current_map,
                                     );
                                     update_input_window(
                                         &mut gsa2,
@@ -424,6 +470,7 @@ pub(crate) fn run_mapedit() {
                                         &mut gsa2,
                                         *current_layer,
                                         *all_layers,
+                                        *current_map,
                                     );
                                 }
                                 BUT_LAYER2 => {
@@ -434,6 +481,7 @@ pub(crate) fn run_mapedit() {
                                         &mut gsa2,
                                         *current_layer,
                                         *all_layers,
+                                        *current_map,
                                     );
                                 }
                                 BUT_LAYER3 => {
@@ -444,6 +492,7 @@ pub(crate) fn run_mapedit() {
                                         &mut gsa2,
                                         *current_layer,
                                         *all_layers,
+                                        *current_map,
                                     );
                                 }
                                 BUT_LAYERS => {
@@ -454,6 +503,7 @@ pub(crate) fn run_mapedit() {
                                         &mut gsa2,
                                         *current_layer,
                                         *all_layers,
+                                        *current_map,
                                     );
                                 }
                                 BUT_EXIT => {
@@ -484,6 +534,7 @@ pub(crate) fn run_mapedit() {
                                                 &mut gsa2,
                                                 *current_layer,
                                                 *all_layers,
+                                                *current_map,
                                             );
                                         } else if mouse_pos.x / 16 == 20 {
                                             println!("no");
@@ -494,6 +545,7 @@ pub(crate) fn run_mapedit() {
                                                 &mut gsa2,
                                                 *current_layer,
                                                 *all_layers,
+                                                *current_map,
                                             );
                                         }
                                     }
@@ -531,14 +583,14 @@ pub(crate) fn run_mapedit() {
                         match *state {
                             State::Edit => {
                                 // normal mode
-                                gsa1.bgs[0].scroll -= delta;
-                                gsa1.bgs[1].scroll -= delta;
-                                gsa1.bgs[2].scroll -= delta;
+                                gsa1.bg[0].scroll -= delta;
+                                gsa1.bg[1].scroll -= delta;
+                                gsa1.bg[2].scroll -= delta;
                             }
                             State::SelectTile => {
                                 // tile select mode
-                                gsa2.bgs[0].scroll -= delta;
-                                gsa2.bgs[1].scroll -= delta;
+                                gsa2.bg[0].scroll -= delta;
+                                gsa2.bg[1].scroll -= delta;
                                 //gsa2.bgs[2].scroll -= delta;
                             }
                             _ => {}
@@ -546,17 +598,17 @@ pub(crate) fn run_mapedit() {
                     }
                     *mouse_pos = new_pos;
                     *tile_pos = IVec2 {
-                        x: (new_pos.x + gsa1.bgs[0].scroll.x).div_euclid(TILE_SIZE as i32),
-                        y: (new_pos.y + gsa1.bgs[0].scroll.y).div_euclid(TILE_SIZE as i32),
+                        x: (new_pos.x + gsa1.bg[0].scroll.x).div_euclid(TILE_SIZE as i32),
+                        y: (new_pos.y + gsa1.bg[0].scroll.y).div_euclid(TILE_SIZE as i32),
                     };
                     *tile_pos2 = IVec2 {
-                        x: (new_pos.x + gsa2.bgs[0].scroll.x).div_euclid(TILE_SIZE as i32),
-                        y: (new_pos.y + gsa2.bgs[0].scroll.y).div_euclid(TILE_SIZE as i32),
+                        x: (new_pos.x + gsa2.bg[0].scroll.x).div_euclid(TILE_SIZE as i32),
+                        y: (new_pos.y + gsa2.bg[0].scroll.y).div_euclid(TILE_SIZE as i32),
                     };
-                    let cursor_pos = *tile_pos * TILE_SIZE as i32 - gsa1.bgs[0].scroll;
-                    let cursor_pos2 = *tile_pos2 * TILE_SIZE as i32 - gsa2.bgs[0].scroll;
-                    gsa1.sprites[SPR_CURSOR].pos = cursor_pos;
-                    gsa2.sprites[SPR_CURSOR].pos = cursor_pos2;
+                    let cursor_pos = *tile_pos * TILE_SIZE as i32 - gsa1.bg[0].scroll;
+                    let cursor_pos2 = *tile_pos2 * TILE_SIZE as i32 - gsa2.bg[0].scroll;
+                    gsa1.sprite[SPR_CURSOR].pos = cursor_pos;
+                    gsa2.sprite[SPR_CURSOR].pos = cursor_pos2;
                 }
                 _ => {}
             },
@@ -571,7 +623,7 @@ pub(crate) fn run_mapedit() {
                                 && tile_pos.y < BACKGROUND_MAX_SIZE as i32
                             {
                                 let tile = (selected_tile.x + (selected_tile.y << 8)) as u16;
-                                gsa1.bgs[*current_layer].tiles[tile_pos.x as usize]
+                                gsa1.bg[*current_layer].tiles[tile_pos.x as usize]
                                     [tile_pos.y as usize] = tile;
                             }
                         } else if *right_down {
@@ -580,7 +632,7 @@ pub(crate) fn run_mapedit() {
                                 && tile_pos.x < BACKGROUND_MAX_SIZE as i32
                                 && tile_pos.y < BACKGROUND_MAX_SIZE as i32
                             {
-                                gsa1.bgs[*current_layer].tiles[tile_pos.x as usize]
+                                gsa1.bg[*current_layer].tiles[tile_pos.x as usize]
                                     [tile_pos.y as usize] = EMPTY_TILE;
                             }
                         }
@@ -592,10 +644,10 @@ pub(crate) fn run_mapedit() {
                                 && tile_pos2.x < BACKGROUND_MAX_SIZE as i32
                                 && tile_pos2.y < BACKGROUND_MAX_SIZE as i32
                             {
-                                gsa2.bgs[1].tiles[selected_tile.x as usize]
+                                gsa2.bg[1].tiles[selected_tile.x as usize]
                                     [selected_tile.y as usize] = EMPTY_TILE;
                                 *selected_tile = *tile_pos2;
-                                gsa2.bgs[1].tiles[selected_tile.x as usize]
+                                gsa2.bg[1].tiles[selected_tile.x as usize]
                                     [selected_tile.y as usize] = TILE_MARKER;
                             }
                         }
@@ -626,10 +678,10 @@ pub(crate) fn run_mapedit() {
                 };
                 match *state {
                     State::Edit => {
-                        let xs = -gsa1.bgs[0].scroll.x - 1;
-                        let ys = -gsa1.bgs[0].scroll.y - 1;
-                        let xe = xs + gsa1.bgs[0].size.x * TILE_SIZE as i32 + 1;
-                        let ye = ys + gsa1.bgs[0].size.y * TILE_SIZE as i32 + 1;
+                        let xs = -gsa1.bg[0].scroll.x - 1;
+                        let ys = -gsa1.bg[0].scroll.y - 1;
+                        let xe = xs + gsa1.bg[0].size.x * TILE_SIZE as i32 + 1;
+                        let ye = ys + gsa1.bg[0].size.y * TILE_SIZE as i32 + 1;
                         if xs >= 16 && xs < screen_size.x {
                             let starty = (ys + 1).max(0);
                             let len = ye.min(screen_size.y) - starty;