Get video_sdl2 compiling

src/device.rs

@@ -2,6 +2,7 @@ pub mod buff;
 pub mod console;
 pub mod null;
 pub mod system;
+pub mod video_sdl2;
 
 use crate::vm::Uxn;
 

src/device/video_sdl2.rs

@@ -1,6 +1,9 @@
-use crate::uxn::device::Device;
+use crate::{
+    device::{Device, DeviceError},
+    vm::Uxn,
+};
 
-static blending: [[u8; 16]; 5] = [
+static BLENDING: [[u8; 16]; 5] = [
     [0, 0, 0, 0, 1, 0, 1, 1, 2, 2, 0, 2, 3, 3, 3, 0],
     [0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3],
     [1, 2, 3, 1, 1, 2, 3, 1, 1, 2, 3, 1, 1, 2, 3, 1],
@@ -8,17 +11,19 @@ static blending: [[u8; 16]; 5] = [
     [1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 1, 0],
 ];
 
-static palette_mono: [u32; 2] = [0x0f000000u32, 0x0fffffffu32];
+static PALETTE_MONO: [u32; 2] = [0x0f000000u32, 0x0fffffffu32];
 
+#[derive(Debug)]
 struct Layer {
     pixels: Vec<u8>,
     changed: bool,
 }
 
+#[derive(Debug)]
 pub struct Sdl2VideoDevice {
     vector: u16,
     palette: [u32; 4],
-    pixels: &[u32],
+    pixels: Vec<u32>,
     width: u16,
     height: u16,
     fg: Layer,
@@ -37,7 +42,7 @@ impl Sdl2VideoDevice {
     }
 
     fn clear(&mut self) {
-        for i in 0..self.width * self.height {
+        for i in 0..(self.width * self.height) as usize {
             // FIXME: Is there some clear/set operation on vector? You can write your own seemingly, but it's this loop.
             self.fg.pixels[i] = 0x00;
             self.bg.pixels[i] = 0x00;
@@ -50,8 +55,8 @@ impl Sdl2VideoDevice {
     fn write_pixel(&mut self, layer: bool, x: u16, y: u16, color: u8) {
         let layer = if layer { &mut self.fg } else { &mut self.bg };
         if x < self.width && y < self.height {
-            let idx = x + (y * self.height) as usize;
-            if color != layer.pixes[idx] {
+            let idx = (x + (y * self.height)) as usize;
+            if color != layer.pixels[idx] {
                 layer.pixels[idx] = color;
                 layer.changed |= true;
             }
@@ -60,30 +65,35 @@ impl Sdl2VideoDevice {
 
     /**
      * Roll through the pixels associated with a sprite, calling write_pixel for each one.
+     *
+     * Known as `screen_blit` in the C implementation.
      */
     fn write_sprite(
         &mut self,
         layer: bool,
         x: u16,
         y: u16,
-        sprite_ptr: (),
+        sprite: &[u8],
+        color: u8,
         flipx: bool,
         flipy: bool,
         twobpp: bool,
     ) {
-        let mut v = h = opaque = blending[4][color];
+        let v = BLENDING[4][color as usize];
+        let h = v;
+        let opaque = v;
         for v in 0..8 {
-            let c: u8 = sprite[v] | (if twobpp { sprite[v + 8] } else { 0 }) << 8;
+            let mut c: u8 = sprite[v] | (if twobpp { sprite[v + 8] } else { 0 }) << 8;
 
             for h in 7..0 {
-                c = c >>= 1;
-                let ch = (c & 1) | ((c >> 7) & 2);
-                if (opaque || (ch != 0)) {
+                c = c >> 1;
+                let ch = ((c & 1) | ((c >> 7) & 2)) as usize;
+                if opaque != 0 || ch != 0 {
                     self.write_pixel(
                         layer,
-                        x + (if flipx { 7 - h } else { h }),
-                        y + (if flipy { 7 - v } else { v }),
-                        blending[ch][color],
+                        x + (if flipx { 7 - h } else { h }) as u16,
+                        y + (if flipy { 7 - v } else { v }) as u16,
+                        BLENDING[ch][color as usize],
                     );
                 }
             }
@@ -104,7 +114,7 @@ impl Sdl2VideoDevice {
             let g = (colors[2 + i / 2] >> shift) & 0x0f;
             let b = (colors[4 + i / 2] >> shift) & 0x0f;
 
-            self.palette[i] = 0x0f000000 | r << 16 | g << 8 | b;
+            self.palette[i] = 0x0f000000u32 | (r as u32) << 16 | (g as u32) << 8 | b as u32;
             self.palette[i] |= self.palette[i] << 4;
 
             shift ^= 4;
@@ -117,23 +127,23 @@ impl Sdl2VideoDevice {
 
     fn redraw(&mut self) {
         let size = self.width * self.height;
-        let mut pallet = [0u32; 16];
+        let mut palette = [0u32; 16];
         for i in 0..16 {
             let idx = if (i >> 2) != 0 { i >> 2 } else { i & 3 };
             palette[i] = self.palette[idx];
         }
-        if (self.mono) {
-            for i in i..size {
+        if self.mono != 0 {
+            for i in 0..size as usize {
                 let idx = (if self.fg.pixels[i] != 0 {
                     self.fg.pixels[i]
                 } else {
                     self.bg.pixels[i]
                 }) & 0x1;
-                pixels[i] = palette_mono[idx];
+                self.pixels[i] = PALETTE_MONO[idx as usize];
             }
         } else {
-            for i in 0..size {
-                pixels[i] = palette[self.fg.pixels[i] << 2 | self.bg.pixels[i]];
+            for i in 0..size as usize {
+                self.pixels[i] = palette[(self.fg.pixels[i] << 2 | self.bg.pixels[i]) as usize];
             }
         }
         self.fg.changed = false;
@@ -146,12 +156,12 @@ impl Device for Sdl2VideoDevice {
         let slot = port & 0xF;
         // FIXME: this is sorta copypasta, but LOTS of source byte order assumptions here.
         match slot {
-            0x0 => Ok(self.vector >> 8),
-            0x1 => Ok(self.vector & 0xFF),
-            0x2 => Ok(self.width >> 8),
-            0x3 => Ok(self.width & 0xFF),
-            0x4 => Ok(self.height >> 8),
-            0x5 => Ok(self.height & 0xFF),
+            0x0 => Ok((self.vector >> 8) as u8),
+            0x1 => Ok((self.vector & 0xFF) as u8),
+            0x2 => Ok((self.width >> 8) as u8),
+            0x3 => Ok((self.width & 0xFF) as u8),
+            0x4 => Ok((self.height >> 8) as u8),
+            0x5 => Ok((self.height & 0xFF) as u8),
             _ => Ok(0),
         }
     }
@@ -182,6 +192,6 @@ impl Device for Sdl2VideoDevice {
 
             _ => (),
         }
-        Ok()
+        Ok(())
     }
 }