minor stuff, store translation as i8

5 files changed, 42 insertions, 7 deletions

diff --git a/evc/src/block.rs b/evc/src/block.rs
index 024adb6..929793d 100644
--- a/evc/src/block.rs
+++ b/evc/src/block.rs
@@ -3,7 +3,7 @@ use anyhow::bail;
 use crate::{
     pixel::Pixel,
     ser::{Ser, Sink, Source},
-    vec2::Vec2,
+    vec2::{Small, Vec2},
 };
 
 #[derive(Clone, Debug)]
@@ -27,7 +27,7 @@ impl Block {
             }
             Block::Reference { translation } => {
                 sink.put(2u8)?;
-                sink.put(*translation)?;
+                sink.put(Small(*translation))?;
             }
         }
         Ok(())
@@ -54,7 +54,7 @@ impl Block {
                 [a, b]
             })),
             2 => Block::Reference {
-                translation: source.get()?,
+                translation: source.get::<Small<Vec2>>()?.0,
             },
             x => bail!("corrupt block type ({})", x),
         })
diff --git a/evc/src/debug.rs b/evc/src/debug.rs
index cbc598e..0858fe4 100644
--- a/evc/src/debug.rs
+++ b/evc/src/debug.rs
@@ -25,10 +25,13 @@ impl Frame {
         let (mut cx, mut cy) = (sx, sy);
         let mut lc = 0.0;
         while lc < len {
-            self[Vec2 {
-                x: cx as isize,
-                y: cy as isize,
-            }] = color;
+            self.set(
+                Vec2 {
+                    x: cx as isize,
+                    y: cy as isize,
+                },
+                color,
+            );
             lc += 0.5;
             cx += nx * 0.5;
             cy += ny * 0.5;
diff --git a/evc/src/frame.rs b/evc/src/frame.rs
index 81390a2..3c40a3d 100644
--- a/evc/src/frame.rs
+++ b/evc/src/frame.rs
@@ -49,6 +49,11 @@ impl Frame {
     pub fn view_area_mut<'a>(&'a mut self, offset: Vec2, size: Vec2) -> View<&'a mut Frame> {
         View::new(self, offset, size)
     }
+    pub fn set(&mut self, pos: Vec2, color: Pixel) {
+        if pos.x >= 0 && pos.y >= 0 && pos.x < self.size.x && pos.y < self.size.y {
+            self[pos] = color
+        }
+    }
 }
 
 impl Index<Vec2> for Frame {
diff --git a/evc/src/ser.rs b/evc/src/ser.rs
index 61ca684..98d6706 100644
--- a/evc/src/ser.rs
+++ b/evc/src/ser.rs
@@ -93,6 +93,18 @@ impl Ser for u8 {
         Ok(buf[0])
     }
 }
+impl Ser for i8 {
+    fn write(&self, sink: &mut impl Write) -> anyhow::Result<()> {
+        Ok(sink
+            .write_all(&unsafe { std::mem::transmute_copy::<_, [u8; 1]>(self) })
+            .context("write i8")?)
+    }
+    fn read(source: &mut impl Read) -> anyhow::Result<Self> {
+        let mut buf = [0u8; 1];
+        source.read_exact(&mut buf)?;
+        Ok(unsafe { std::mem::transmute_copy(&buf) })
+    }
+}
 impl Ser for u16 {
     fn write(&self, sink: &mut impl Write) -> anyhow::Result<()> {
         Ok(sink
diff --git a/evc/src/vec2.rs b/evc/src/vec2.rs
index b1dd1b4..8b01fdb 100644
--- a/evc/src/vec2.rs
+++ b/evc/src/vec2.rs
@@ -26,6 +26,21 @@ impl Ser for Vec2 {
     }
 }
 
+pub struct Small<T>(pub T);
+impl Ser for Small<Vec2> {
+    fn write(&self, sink: &mut impl std::io::Write) -> anyhow::Result<()> {
+        sink.put((self.0.x as i8, self.0.y as i8))
+    }
+
+    fn read(source: &mut impl std::io::Read) -> anyhow::Result<Self> {
+        let (x, y): (i8, i8) = source.get()?;
+        Ok(Small(Vec2 {
+            x: x as isize,
+            y: y as isize,
+        }))
+    }
+}
+
 impl std::ops::Add for Vec2 {
     type Output = Vec2;
     #[inline]