Move Sprite/BgAttribs to separate file

src/display/mod.rs

@@ -2,7 +2,9 @@ extern crate libc;
 extern crate sdl2;
 
 mod palette;
+mod structs;
 use palette::{CgbPalette, DmgPalette};
+use structs::*;
 
 use std::io::Write;
 
@@ -49,49 +51,6 @@ const SPRITE_X_FLIP: u8 = 1 << 5;
 //const SPRITE_PALETTE_NO: u8 = 1 << 4; // NonCGB only
 const SPRITE_TILE_VRAM_BANK: u8 = 1 << 3; // CGB only
 
-// Display color
-/*
-const MONOCHROME_PALETTE: &'static [[f64; 3]; 4] = &[
-    [0.605, 0.734, 0.059],
-    [0.543, 0.672, 0.059],
-    [0.188, 0.383, 0.188],
-    [0.059, 0.219, 0.059],
-];
-const MONOCHROME_PALETTE: &'static [[u8; 3]; 4] = &[
-    [255, 255, 255],
-    [200, 200, 200],
-    [125, 125, 12],
-    [50, 50, 50],
-];
-*/
-
-struct BgMapAttributes(u8);
-impl BgMapAttributes {
-    fn palette_number(&self) -> usize {
-        (self.0 & 0b111) as usize
-    }
-
-    fn vram_bank_number(&self) -> usize {
-        ((self.0 >> 3) & 1) as usize
-    }
-
-    fn horizontal_flip(&self) -> bool {
-        (self.0 >> 5) != 0
-    }
-
-    fn vertical_flip(&self) -> bool {
-        (self.0 >> 6) != 0
-    }
-}
-
-#[derive(Debug, Copy, Clone)]
-enum PixelOrigin {
-    Empty,
-    Background(usize),
-    Window,
-    Sprite,
-}
-
 #[derive(Copy, Clone)]
 struct Pixel {
     origin: PixelOrigin,
@@ -121,53 +80,6 @@ impl Default for DisplayMode {
     }
 }
 
-struct Sprite {
-    x: u8,
-    y: u8,
-    tile: u8,
-    flags: u8,
-}
-
-impl Sprite {
-    fn is_hidden(&self) -> bool {
-        self.x == 0 || self.y == 0
-    }
-
-    fn is_foreground(&self) -> bool {
-        (self.flags & SPRITE_OBJ_BG_PRIORITY) == 0
-    }
-
-    fn is_x_flipped(&self) -> bool {
-        (self.flags & SPRITE_X_FLIP) == SPRITE_X_FLIP
-    }
-
-    fn is_y_flipped(&self) -> bool {
-        (self.flags & SPRITE_Y_FLIP) == SPRITE_Y_FLIP
-    }
-
-    fn palette(&self) -> u8 {
-        // GB
-        /*
-        if (self.flags & SPRITE_PALETTE_NO) == 0 {
-            0
-        } else {
-            1
-        }
-        */
-        // GBC
-        self.flags & 0b111
-    }
-
-    // GBC only
-    fn vram_bank(&self) -> u8 {
-        if (self.flags & SPRITE_TILE_VRAM_BANK) == 0 {
-            0
-        } else {
-            1
-        }
-    }
-}
-
 pub struct Display {
     control: u8,
     status: u8,
@@ -680,12 +592,7 @@ impl Display {
         // Order sprites by priority
         let mut queue: Vec<Sprite> = Vec::new();
         for i in 0..39 {
-            queue.push(Sprite {
-                y: self.oam[i * 4 + 0],
-                x: self.oam[i * 4 + 1],
-                tile: self.oam[i * 4 + 2],
-                flags: self.oam[i * 4 + 3],
-            });
+            queue.push(Sprite::load(&self.oam[i * 4..(i + 1) * 4]));
         }
 
         // This is the non-CGB priority.
@@ -747,9 +654,9 @@ impl Display {
 
                 // Lookup the color
                 let c = ((b2 as u8) * 2 + b1 as u8) as usize;
-                // let c = self.background_palette.get_color(c);
-                let c = self.background_palette_cgb[bg_attribs.palette_number()].get_color(c);
-                self.set_pixel(render_x, render_y, c, PixelOrigin::Background(c));
+                // let color = self.background_palette.get_color(c);
+                let color = self.background_palette_cgb[bg_attribs.palette_number()].get_color(c);
+                self.set_pixel(render_x, render_y, color, PixelOrigin::Background(c));
             }
         }
 

src/display/palette.rs

@@ -4,7 +4,7 @@ use super::sdl2;
 pub struct DmgPalette(pub u8);
 impl DmgPalette {
     pub fn get_color(self, n: usize) -> sdl2::pixels::Color {
-        const MONOCHROME_PALETTE: &'static [[u8; 3]; 4] = &[
+        const MONOCHROME_PALETTE: &[[u8; 3]; 4] = &[
             [255, 255, 255],
             [200, 200, 200],
             [125, 125, 12],

src/display/structs.rs

@@ -0,0 +1,85 @@
+use super::*;
+// Display color
+pub struct BgMapAttributes(pub u8);
+impl BgMapAttributes {
+    pub fn palette_number(&self) -> usize {
+        (self.0 & 0b111) as usize
+    }
+
+    pub fn vram_bank_number(&self) -> usize {
+        ((self.0 >> 3) & 1) as usize
+    }
+
+    pub fn horizontal_flip(&self) -> bool {
+        (self.0 >> 5) != 0
+    }
+
+    pub fn vertical_flip(&self) -> bool {
+        (self.0 >> 6) != 0
+    }
+}
+
+#[derive(Debug, Copy, Clone)]
+pub enum PixelOrigin {
+    Empty,
+    Background(usize),
+    Window,
+    Sprite,
+}
+
+pub struct Sprite {
+    pub x: u8,
+    pub y: u8,
+    pub tile: u8,
+    flags: u8,
+}
+
+impl Sprite {
+    pub fn load(buf: &[u8]) -> Self {
+        assert!(buf.len() > 4);
+        Self {
+            x: buf[0],
+            y: buf[1],
+            tile: buf[2],
+            flags: buf[3],
+        }
+    }
+
+    pub fn is_hidden(&self) -> bool {
+        self.x == 0 || self.y == 0
+    }
+
+    pub fn is_foreground(&self) -> bool {
+        (self.flags & SPRITE_OBJ_BG_PRIORITY) == 0
+    }
+
+    pub fn is_x_flipped(&self) -> bool {
+        (self.flags & SPRITE_X_FLIP) == SPRITE_X_FLIP
+    }
+
+    pub fn is_y_flipped(&self) -> bool {
+        (self.flags & SPRITE_Y_FLIP) == SPRITE_Y_FLIP
+    }
+
+    pub fn palette(&self) -> u8 {
+        // GB
+        /*
+        if (self.flags & SPRITE_PALETTE_NO) == 0 {
+            0
+        } else {
+            1
+        }
+        */
+        // GBC
+        self.flags & 0b111
+    }
+
+    // GBC only
+    pub fn vram_bank(&self) -> u8 {
+        if (self.flags & SPRITE_TILE_VRAM_BANK) == 0 {
+            0
+        } else {
+            1
+        }
+    }
+}