From b2eb480c440f96f222145056b3edcfb1be8ac80c Mon Sep 17 00:00:00 2001 From: Onno Kammeraad Date: Tue, 12 Nov 2019 09:44:27 +0100 Subject: [PATCH] add multipage testcase, to validate the multipage image handling --- tests/encode_images.rs | 33 ++++++++++++++++++++++++++++++++- 1 file changed, 32 insertions(+), 1 deletion(-) diff --git a/tests/encode_images.rs b/tests/encode_images.rs index 2ae8c1c..1c7d313 100644 --- a/tests/encode_images.rs +++ b/tests/encode_images.rs @@ -260,4 +260,35 @@ fn test_signed() { assert_eq!(decoder.get_tag(Tag::Unknown(65030)).unwrap().into_i32_vec().unwrap(), [-1, 100]); assert_eq!(decoder.get_tag(Tag::Unknown(65031)).unwrap().into_i32_vec().unwrap(), [-1_i32, 100, 2, 100]); } -} \ No newline at end of file +} + +#[test] +/// check multipage image handling +fn test_multipage_image() { + let mut img_file = tempfile::tempfile().unwrap(); + + { + // first create a multipage image with 2 images + let mut img_encoder = TiffEncoder::new(&img_file).unwrap(); + + // write first grayscale image (2x2 16-bit) + let img1: Vec = [1, 2, 3, 4].to_vec(); + img_encoder.write_image::(2, 2, &img1[..]); + // write second grayscale image (3x3 8-bit) + let img2: Vec = [9, 8, 7, 6, 5, 4, 3, 2, 1].to_vec(); + img_encoder.write_image::(3, 3, &img2[..]); + } + + // seek to the beginning of the file, so that it can be decoded + img_file.seek(SeekFrom::Start(0)).unwrap(); + + { + let mut img_decoder = Decoder::new(&img_file).unwrap(); + + // check the dimensions of the image in the first page + assert_eq!(img_decoder.dimensions().unwrap(), (2, 2)); + img_decoder.next_image().unwrap(); + // check the dimensions of the image in the second page + assert_eq!(img_decoder.dimensions().unwrap(), (3, 3)); + } +}