From 644c0d8e73d78d4437e0df03c0c9192fb8e88d6a Mon Sep 17 00:00:00 2001
From: Annika Hannig <annika@hannig.cc>
Date: Mon, 26 Sep 2022 15:22:30 +0200
Subject: [PATCH] initial graphics

---
 airportdisplay/src/commands.rs |  9 +++++++++
 airportdisplay/src/graphics.rs |  9 +++++++++
 airportdisplay/src/lib.rs      |  1 +
 airportdisplay/src/protocol.rs | 36 +++++++++++++++++++++++++---------
 4 files changed, 46 insertions(+), 9 deletions(-)
 create mode 100644 airportdisplay/src/graphics.rs

diff --git a/airportdisplay/src/commands.rs b/airportdisplay/src/commands.rs
index c34a8dc..f16df68 100644
--- a/airportdisplay/src/commands.rs
+++ b/airportdisplay/src/commands.rs
@@ -1,6 +1,7 @@
 use std::convert::From;
 
 use super::{
+    graphics::Graphics,
     luminance::Luminance,
     text::{Buffer as TextBuffer, Raw as TextRaw, Text},
 };
@@ -13,6 +14,7 @@ pub enum Command {
     Fadeout,
     Text(Text),
     Luminance(Luminance),
+    Graphics(Graphics),
 }
 
 /// Directly converty a raw text into a command which
@@ -38,3 +40,10 @@ impl From<Luminance> for Command {
         Command::Luminance(luminance)
     }
 }
+
+/// Shortcut for graphics
+impl From<Graphics> for Command {
+    fn from(gfx: Graphics) -> Self {
+        Command::Graphics(gfx)
+    }
+}
diff --git a/airportdisplay/src/graphics.rs b/airportdisplay/src/graphics.rs
new file mode 100644
index 0000000..800c13a
--- /dev/null
+++ b/airportdisplay/src/graphics.rs
@@ -0,0 +1,9 @@
+pub enum Graphics {
+    /// Raw is a series
+    Raw,
+}
+
+/// Raw: Offset + Raw pixel content.
+/// Pixels content: series of byte-sized 8 pixel
+/// horizontal blocks. highest bit is the top left pixel
+pub struct Raw(pub u16, pub Vec<u8>);
diff --git a/airportdisplay/src/lib.rs b/airportdisplay/src/lib.rs
index f61d1ab..227854d 100644
--- a/airportdisplay/src/lib.rs
+++ b/airportdisplay/src/lib.rs
@@ -1,6 +1,7 @@
 mod commands;
 mod display;
 pub mod geometry;
+pub mod graphics;
 pub mod luminance;
 mod protocol;
 pub mod text;
diff --git a/airportdisplay/src/protocol.rs b/airportdisplay/src/protocol.rs
index 7c7a056..d187633 100644
--- a/airportdisplay/src/protocol.rs
+++ b/airportdisplay/src/protocol.rs
@@ -5,12 +5,14 @@ use codepage_437::{ToCp437, CP437_WINGDINGS};
 use super::{
     commands::Command,
     geometry::{Origin, Size, Window, COLUMNS, ROWS},
+    graphics::Raw as GraphicsRaw,
     luminance::Luminance,
-    text,
+    text::{Buffer as TextBuffer, Raw as TextRaw, Text},
 };
 
 const CMD_RAW_TEXT: &'static [u8] = &[0x00, 0x03];
 const CMD_RAW_LUM: &'static [u8] = &[0x00, 0x05];
+const CMD_RAW_GFX: &'static [u8] = &[0x00, 0x12];
 
 /// A frame holds a single encoded display command,
 /// like set text at pos x, y.
@@ -44,9 +46,25 @@ impl From<Window> for Frame {
     }
 }
 
+/// Encode raw graphics
+impl From<GraphicsRaw> for Data {
+    fn from(raw: GraphicsRaw) -> Self {
+        let GraphicsRaw(offset, data) = raw;
+        vec![[
+            CMD_RAW_GFX.into(),
+            encode_u16(offset),
+            encode_u16(data.len() as u16),
+            encode_u16(0),
+            encode_u16(0),
+            data.into(),
+        ]
+        .concat()]
+    }
+}
+
 /// Encode raw text byte command
-impl From<text::Raw> for Data {
-    fn from(text::Raw(origin, bytes): text::Raw) -> Data {
+impl From<TextRaw> for Data {
+    fn from(TextRaw(origin, bytes): TextRaw) -> Data {
         let mut bytes = bytes.clone();
         bytes.truncate(COLUMNS);
         let size = Size(bytes.len() as u16, 1);
@@ -63,8 +81,8 @@ impl From<Luminance> for Data {
 }
 
 /// Encode a text buffer as a series of commands (data).
-impl From<text::Buffer> for Data {
-    fn from(text::Buffer(Origin(x, y), text): text::Buffer) -> Data {
+impl From<TextBuffer> for Data {
+    fn from(TextBuffer(Origin(x, y), text): TextBuffer) -> Data {
         let mut lines: Vec<&str> = text.split("\n").collect();
         lines.truncate(ROWS);
 
@@ -94,11 +112,11 @@ impl From<text::Buffer> for Data {
 }
 
 /// Encode text command
-impl From<text::Text> for Data {
-    fn from(text: text::Text) -> Data {
+impl From<Text> for Data {
+    fn from(text: Text) -> Data {
         match text {
-            text::Text::Raw(raw) => raw.into(),
-            text::Text::Buffer(buffer) => buffer.into(),
+            Text::Raw(raw) => raw.into(),
+            Text::Buffer(buffer) => buffer.into(),
         }
     }
 }