Rewrite emulatorv1.0.0-alpha1

This is a complete rewrite and restructure of the entire emulator
project, as part of the effort in locking down the Bedrock specification
and in creating much better tooling for creating and using Bedrock
programs.

This commit adds a command-line argument scheme, an embedded assembler,
a headless emulator for use in non-graphical environments, deferred
window creation for programs that do not access the screen device,
and new versions of phosphor and bedrock-core. The new version of
phosphor supports multi-window programs, which will make it possible to
implement program forking in the system device later on, and the new
version of bedrock-core implements the final core specification.

1 files changed, 0 insertions, 109 deletions

diff --git a/src/devices/screen/sprite_data.rs b/src/devices/screen/sprite_data.rs
deleted file mode 100644
index 0a1d3c2..0000000
--- a/src/devices/screen/sprite_data.rs
+++ /dev/null
@@ -1,109 +0,0 @@
-use super::*;
-
-macro_rules! test { ($value:expr, $mask:expr) => { $value & $mask != 0 }; }
-
-
-pub struct SpriteBuffer {
-    data: [u8; 16],
-    pointer: usize,
-    colours: [u8; 4],
-}
-
-impl SpriteBuffer {
-    pub fn new() -> Self {
-        Self { data: [0; 16], pointer: 0, colours: [0; 4] }
-    }
-
-    pub fn push(&mut self, val: u8) {
-        self.data[self.pointer] = val;
-        self.pointer = (self.pointer + 1) % 16;
-    }
-
-    pub fn set_colour_high(&mut self, val: u8) {
-        self.colours[0] = val >> 4;
-        self.colours[1] = val & 0x0f;
-    }
-
-    pub fn set_colour_low(&mut self, val: u8) {
-        self.colours[2] = val >> 4;
-        self.colours[3] = val & 0x0f;
-    }
-
-    // Return the 64 transformed pixels of the current 1-bit sprite.
-    // Each pixel is the palette index of that pixel, or 0xff if transparent.
-    pub fn get_1bit_sprite(&self, params: u8) -> Sprite {
-        let mut sprite = [[0u8; 8]; 8];
-        let plane = self.get_low_plane(params);
-        let colours = self.get_colours(params);
-        for (y, row) in plane.into_iter().enumerate() {
-            for x in (0..8).rev() {
-                sprite[y][7-x] = colours[(row >> x & 0x1) as usize];
-            }
-        }
-        return sprite;
-    }
-
-    // Return the 64 transformed pixels of the current 2-bit sprite.
-    // Each pixel is the palette index of that pixel, or 0xff if transparent.
-    pub fn get_2bit_sprite(&self, params: u8) -> Sprite {
-        let mut sprite = [[0u8; 8]; 8];
-        let high_plane = self.get_high_plane(params);
-        let low_plane = self.get_low_plane(params);
-        let colours = self.get_colours(params);
-        for (y, (row_h, row_l)) in zip(high_plane, low_plane).enumerate() {
-            for x in (0..8).rev() {
-                let bit_h = (row_h >> x) & 0x1;
-                let bit_l = (row_l >> x) & 0x1;
-                sprite[y][7-x] = colours[(bit_h << 1 | bit_l) as usize];
-            }
-        }
-        return sprite;
-    }
-
-    fn get_high_plane(&self, params: u8) -> Plane {
-        let mut plane = [0u8; 8];
-        for (i, row) in plane.iter_mut().enumerate() {
-            *row = self.data[(self.pointer + i) % 16]
-        }
-        transform_plane(plane, params)
-    }
-
-    fn get_low_plane(&self, params: u8) -> Plane {
-        let mut plane = [0u8; 8];
-        for (i, row) in plane.iter_mut().enumerate() {
-            *row = self.data[(self.pointer + i + 8) % 16]
-        }
-        transform_plane(plane, params)
-    }
-
-    fn get_colours(&self, params: u8) -> [u8; 4] {
-        let mut colours = self.colours;
-        if test!(params, TRANSPARENT) {
-            colours[0] = 0xff;
-        }
-        return colours;
-    }
-}
-
-fn transform_plane(mut plane: Plane, params: u8) -> Plane {
-    if test!(params, FLIP_DIAGONAL) {
-        let mut flipped = [0u8; 8];
-        for mut row in plane {
-            for y in 0..8 {
-                flipped[y] = flipped[y] << 1 | row >> 7;
-                row <<= 1;
-            }
-        }
-        plane = flipped;
-    }
-    if test!(params, FLIP_VERTICAL) {
-        plane.reverse();
-    }
-    if test!(params, FLIP_HORIZONTAL) {
-        for row in plane.iter_mut() {
-            *row = row.reverse_bits();
-        }
-    }
-    return plane;
-}
-