use lofty::PictureInformation; use std::fs::File; use std::io::Read; #[test] fn read_png() { // 640x628 let mut f = File::open("tests/picture/assets/png_640x628.png").unwrap(); let mut buf = Vec::new(); f.read_to_end(&mut buf).unwrap(); let information = PictureInformation::from_png(&*buf).unwrap(); assert_eq!(information.width, 640); assert_eq!(information.height, 628); assert_eq!(information.color_depth, 32); // No PLTE chunk assert_eq!(information.num_colors, 0); } #[test] fn read_png_plte() { // PNG image with a PLTE chunk (indexed color) let mut f = File::open("tests/picture/assets/png_640x628_plte.png").unwrap(); let mut buf = Vec::new(); f.read_to_end(&mut buf).unwrap(); let information = PictureInformation::from_png(&*buf).unwrap(); assert_eq!(information.width, 640); assert_eq!(information.height, 628); assert_eq!(information.color_depth, 8); // This field is actually filled since we // have a PLTE chunk assert_eq!(information.num_colors, 118); } #[test] fn read_jpeg() { let mut f = File::open("tests/picture/assets/jpeg_640x628.jpg").unwrap(); let mut buf = Vec::new(); f.read_to_end(&mut buf).unwrap(); let information = PictureInformation::from_jpeg(&*buf).unwrap(); assert_eq!(information.width, 640); assert_eq!(information.height, 628); assert_eq!(information.color_depth, 24); // Always 0, not applicable for JPEG assert_eq!(information.num_colors, 0); }