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use crate::parse_error::ParseError;
use nom::*;
pub const HEADER_LEN: usize = 18;
#[derive(Debug, Copy, Clone, PartialEq)]
pub enum ImageType {
Empty = 0,
ColorMapped = 1,
Truecolor = 2,
Monochrome = 3,
RleColorMapped = 9,
RleTruecolor = 10,
RleMonochrome = 11,
}
#[derive(Debug, Copy, Clone, PartialEq)]
pub struct TgaHeader {
pub id_len: u8,
pub has_color_map: bool,
pub image_type: ImageType,
pub color_map_start: u16,
pub color_map_len: u16,
pub color_map_depth: u8,
pub x_origin: u16,
pub y_origin: u16,
pub width: u16,
pub height: u16,
pub pixel_depth: u8,
pub image_descriptor: u8,
}
named!(has_color_map<&[u8], bool>,
map_res!(
le_u8,
|b| match b {
0 => Ok(false),
1 => Ok(true),
other => Err(ParseError::UnknownColorMap(other))
}
)
);
named!(image_type<&[u8], ImageType>,
map_res!(
le_u8,
|b| match b {
0 => Ok(ImageType::Empty),
1 => Ok(ImageType::ColorMapped),
2 => Ok(ImageType::Truecolor),
3 => Ok(ImageType::Monochrome),
9 => Ok(ImageType::RleColorMapped),
10 => Ok(ImageType::RleTruecolor),
11 => Ok(ImageType::RleMonochrome),
other => Err(ParseError::UnknownImageType(other))
}
)
);
named!(pub header<&[u8], TgaHeader>,
do_parse!(
id_len: le_u8 >>
has_color_map: has_color_map >>
image_type: image_type >>
color_map_start: le_u16 >>
color_map_len: le_u16 >>
color_map_depth: le_u8 >>
x_origin: le_u16 >>
y_origin: le_u16 >>
width: le_u16 >>
height: le_u16 >>
pixel_depth: le_u8 >>
image_descriptor: le_u8 >>
_image_ident: take!(id_len) >>
({
TgaHeader {
id_len,
has_color_map,
image_type,
color_map_start,
color_map_len,
color_map_depth,
x_origin,
y_origin,
width,
height,
pixel_depth,
image_descriptor,
}
})
)
);