extern crate tiff;
use tiff::decoder::{Decoder, DecodingResult};
use tiff::encoder::{colortype, Predictor, TiffEncoder};
use tiff::ColorType;
use std::fs::File;
use std::io::{Cursor, Seek, SeekFrom};
use std::path::PathBuf;
const TEST_IMAGE_DIR: &str = "./tests/images/";
macro_rules! test_predict {
($name:ident, $buffer:ident, $buffer_ty:ty) => {
fn $name<C: colortype::ColorType<Inner = $buffer_ty>>(
file: &str,
expected_type: ColorType,
) {
let path = PathBuf::from(TEST_IMAGE_DIR).join(file);
let file = File::open(path).expect("Cannot find test image!");
let mut decoder = Decoder::new(file).expect("Cannot create decoder!");
assert_eq!(decoder.colortype().unwrap(), expected_type);
let image_data = match decoder.read_image().unwrap() {
DecodingResult::$buffer(res) => res,
_ => panic!("Wrong data type"),
};
let mut predicted = Vec::with_capacity(image_data.len());
C::horizontal_predict(&image_data, &mut predicted);
let sample_size = C::SAMPLE_FORMAT.len();
(0..sample_size).for_each(|i| {
assert_eq!(predicted[i], image_data[i]);
});
(sample_size..image_data.len()).for_each(|i| {
predicted[i] = predicted[i].wrapping_add(predicted[i - sample_size]);
assert_eq!(predicted[i], image_data[i]);
});
}
};
}
test_predict!(test_u8_predict, U8, u8);
test_predict!(test_i8_predict, I8, i8);
test_predict!(test_u16_predict, U16, u16);
test_predict!(test_i16_predict, I16, i16);
test_predict!(test_u32_predict, U32, u32);
test_predict!(test_u64_predict, U64, u64);
#[test]
fn test_gray_u8_predict() {
test_u8_predict::<colortype::Gray8>("minisblack-1c-8b.tiff", ColorType::Gray(8));
}
#[test]
fn test_gray_i8_predict() {
test_i8_predict::<colortype::GrayI8>("minisblack-1c-i8b.tiff", ColorType::Gray(8));
}
#[test]
fn test_rgb_u8_predict() {
test_u8_predict::<colortype::RGB8>("rgb-3c-8b.tiff", ColorType::RGB(8));
}
#[test]
fn test_cmyk_u8_predict() {
test_u8_predict::<colortype::CMYK8>("cmyk-3c-8b.tiff", ColorType::CMYK(8));
}
#[test]
fn test_gray_u16_predict() {
test_u16_predict::<colortype::Gray16>("minisblack-1c-16b.tiff", ColorType::Gray(16));
}
#[test]
fn test_gray_i16_predict() {
test_i16_predict::<colortype::GrayI16>("minisblack-1c-i16b.tiff", ColorType::Gray(16));
}
#[test]
fn test_rgb_u16_predict() {
test_u16_predict::<colortype::RGB16>("rgb-3c-16b.tiff", ColorType::RGB(16));
}
#[test]
fn test_cmyk_u16_predict() {
test_u16_predict::<colortype::CMYK16>("cmyk-3c-16b.tiff", ColorType::CMYK(16));
}
#[test]
fn test_gray_u32_predict() {
test_u32_predict::<colortype::Gray32>("gradient-1c-32b.tiff", ColorType::Gray(32));
}
#[test]
fn test_rgb_u32_predict() {
test_u32_predict::<colortype::RGB32>("gradient-3c-32b.tiff", ColorType::RGB(32));
}
#[test]
fn test_gray_u64_predict() {
test_u64_predict::<colortype::Gray64>("gradient-1c-64b.tiff", ColorType::Gray(64));
}
#[test]
fn test_rgb_u64_predict() {
test_u64_predict::<colortype::RGB64>("gradient-3c-64b.tiff", ColorType::RGB(64));
}
#[test]
fn test_ycbcr_u8_predict() {
test_u8_predict::<colortype::YCbCr8>("tiled-jpeg-ycbcr.tif", ColorType::YCbCr(8));
}
macro_rules! test_predict_roundtrip {
($name:ident, $buffer:ident, $buffer_ty:ty) => {
fn $name<C: colortype::ColorType<Inner = $buffer_ty>>(
file: &str,
expected_type: ColorType,
) {
let path = PathBuf::from(TEST_IMAGE_DIR).join(file);
let img_file = File::open(path).expect("Cannot find test image!");
let mut decoder = Decoder::new(img_file).expect("Cannot create decoder");
assert_eq!(decoder.colortype().unwrap(), expected_type);
let image_data = match decoder.read_image().unwrap() {
DecodingResult::$buffer(res) => res,
_ => panic!("Wrong data type"),
};
let mut file = Cursor::new(Vec::new());
{
let mut tiff = TiffEncoder::new(&mut file)
.unwrap()
.with_predictor(Predictor::Horizontal);
let (width, height) = decoder.dimensions().unwrap();
tiff.write_image::<C>(width, height, &image_data).unwrap();
}
file.seek(SeekFrom::Start(0)).unwrap();
{
let mut decoder = Decoder::new(&mut file).unwrap();
if let DecodingResult::$buffer(img_res) =
decoder.read_image().expect("Decoding image failed")
{
assert_eq!(image_data, img_res);
} else {
panic!("Wrong data type");
}
}
}
};
}
test_predict_roundtrip!(test_u8_predict_roundtrip, U8, u8);
test_predict_roundtrip!(test_i8_predict_roundtrip, I8, i8);
test_predict_roundtrip!(test_u16_predict_roundtrip, U16, u16);
test_predict_roundtrip!(test_i16_predict_roundtrip, I16, i16);
test_predict_roundtrip!(test_u32_predict_roundtrip, U32, u32);
test_predict_roundtrip!(test_u64_predict_roundtrip, U64, u64);
#[test]
fn test_gray_u8_predict_roundtrip() {
test_u8_predict_roundtrip::<colortype::Gray8>("minisblack-1c-8b.tiff", ColorType::Gray(8));
}
#[test]
fn test_gray_i8_predict_roundtrip() {
test_i8_predict_roundtrip::<colortype::GrayI8>("minisblack-1c-i8b.tiff", ColorType::Gray(8));
}
#[test]
fn test_rgb_u8_predict_roundtrip() {
test_u8_predict_roundtrip::<colortype::RGB8>("rgb-3c-8b.tiff", ColorType::RGB(8));
}
#[test]
fn test_cmyk_u8_predict_roundtrip() {
test_u8_predict_roundtrip::<colortype::CMYK8>("cmyk-3c-8b.tiff", ColorType::CMYK(8));
}
#[test]
fn test_gray_u16_predict_roundtrip() {
test_u16_predict_roundtrip::<colortype::Gray16>("minisblack-1c-16b.tiff", ColorType::Gray(16));
}
#[test]
fn test_gray_i16_predict_roundtrip() {
test_i16_predict_roundtrip::<colortype::GrayI16>(
"minisblack-1c-i16b.tiff",
ColorType::Gray(16),
);
}
#[test]
fn test_rgb_u16_predict_roundtrip() {
test_u16_predict_roundtrip::<colortype::RGB16>("rgb-3c-16b.tiff", ColorType::RGB(16));
}
#[test]
fn test_cmyk_u16_predict_roundtrip() {
test_u16_predict_roundtrip::<colortype::CMYK16>("cmyk-3c-16b.tiff", ColorType::CMYK(16));
}
#[test]
fn test_gray_u32_predict_roundtrip() {
test_u32_predict_roundtrip::<colortype::Gray32>("gradient-1c-32b.tiff", ColorType::Gray(32));
}
#[test]
fn test_rgb_u32_predict_roundtrip() {
test_u32_predict_roundtrip::<colortype::RGB32>("gradient-3c-32b.tiff", ColorType::RGB(32));
}
#[test]
fn test_gray_u64_predict_roundtrip() {
test_u64_predict_roundtrip::<colortype::Gray64>("gradient-1c-64b.tiff", ColorType::Gray(64));
}
#[test]
fn test_rgb_u64_predict_roundtrip() {
test_u64_predict_roundtrip::<colortype::RGB64>("gradient-3c-64b.tiff", ColorType::RGB(64));
}
#[test]
fn test_ycbcr_u8_predict_roundtrip() {
test_u8_predict_roundtrip::<colortype::YCbCr8>("tiled-jpeg-ycbcr.tif", ColorType::YCbCr(8));
}