From a368be4dfb3c1f75f6bcfdc297fe0372fb5f6092 Mon Sep 17 00:00:00 2001
From: Genny <gen@nyble.dev>
Date: Mon, 8 Mar 2021 21:02:50 -0600
Subject: Rename a few things

---
 src/block/image.rs | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 src/block/image.rs

(limited to 'src/block/image.rs')

diff --git a/src/block/image.rs b/src/block/image.rs
new file mode 100644
index 0000000..07f9555
--- /dev/null
+++ b/src/block/image.rs
@@ -0,0 +1,47 @@
+use crate::LZW;
+use super::{ColorTable, ImageDescriptor};
+
+pub struct Image {
+	pub image_descriptor: ImageDescriptor,
+	pub local_color_table: Option<ColorTable>,
+	pub indicies: Vec<u8>
+}
+
+impl Image {
+	pub fn as_boxed_slice(&self, minimum_code_size: u8) -> Box<[u8]> {
+		let mut out = vec![];
+
+		let mut boxed: Box<[u8]> = (&self.image_descriptor).into();
+		out.extend_from_slice(&*boxed);
+
+		// Table based image data //
+
+		// Get the mcs while we write out the color table
+		let mut mcs = if let Some(lct) = &self.local_color_table {
+			boxed = lct.into();
+			out.extend_from_slice(&*boxed);
+
+			lct.packed_len()
+		} else {
+			minimum_code_size
+		};
+
+		if mcs < 2 {
+			mcs = 2; // Must be true: 0 <= mcs <= 8
+		}
+
+		// First write out the MCS
+		out.push(mcs);
+
+		let compressed = LZW::encode(mcs, &self.indicies);
+		
+		for chunk in compressed.chunks(255) {
+			out.push(chunk.len() as u8);
+			out.extend_from_slice(chunk);
+		}
+		// Data block length 0 to indicate an end
+		out.push(0x00);
+
+		out.into_boxed_slice()
+	}
+}
\ No newline at end of file
-- 
cgit 1.4.1-3-g733a5