diff options
Diffstat (limited to 'src/block/indexedimage.rs')
-rw-r--r-- | src/block/indexedimage.rs | 70 |
1 files changed, 0 insertions, 70 deletions
diff --git a/src/block/indexedimage.rs b/src/block/indexedimage.rs deleted file mode 100644 index 8ed0319..0000000 --- a/src/block/indexedimage.rs +++ /dev/null @@ -1,70 +0,0 @@ -use std::convert::TryFrom; - -use super::{ColorTable, ImageDescriptor}; -use crate::LZW; - -pub struct IndexedImage { - pub image_descriptor: ImageDescriptor, - pub local_color_table: Option<ColorTable>, - pub indicies: Vec<u8>, -} - -impl IndexedImage { - pub fn left(&self) -> u16 { - self.image_descriptor.left - } - - pub fn top(&self) -> u16 { - self.image_descriptor.left - } - - pub fn width(&self) -> u16 { - self.image_descriptor.width - } - - pub fn height(&self) -> u16 { - self.image_descriptor.height - } - - 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); - - // 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 + 1 - }; - - 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() - } -} - -pub struct CompressedImage { - pub image_descriptor: ImageDescriptor, - pub local_color_table: Option<ColorTable>, - pub lzw_minimum_code_size: u8, - pub blocks: Vec<Vec<u8>>, -} |