Lightweight library written in Rust for handling the Truevision TGA image format.

For more information about the TGA format, please refer to the specification.

RLE

RLE compression algorithm

Data Structure

We can’t use the struct ‘Vec’. It will spend a lot of time. So we need directly use raw pointer and make it as slice.

So that it could be accessed like an array.

struct LayPtr(Layout, *mut u8);

impl Drop for LayPtr {
   fn drop(&mut self) {
       if !self.1.is_null() {
           unsafe { alloc::dealloc(self.1, self.0) }
       }
   } 
}

pub struct ColorMap {
    pub first_index: u16,
    pub entry_count: u16,
    pub bytes_per_entry: u8,
    pub pixels: LayPtr,
}

pub struct Tga {
    pub header: TgaHeader,
    pub info: TgaInfo,
    pub data: LayPtr,
    pub map: Option<ColorMap>,
}