3 Commits

Author	SHA1	Message	Date
Nico Weber	ab7da32d25	LibGfx/JPEG2000: Support jpx extended 'colr' boxes ... The T.800 spec says there should only be one 'colr' box, but the extended jpx file format spec in T.801 annex M allows having multiple. Method 2 is a basic ICC profile, while method 3 (jpx-only) allows full ICC profiles. Support that. For the test, I opened buggie.png in Photoshop, converted it to grayscale, and saved it as a JPEG2000, with "JP2 Compatible" checked and "Include Transparency" unchecked. I also unchecked "Include Metadata", and "Lossless". I left "Fast Mode" checked and the quality at the default 50.	2024-03-30 10:01:07 +01:00
Nico Weber	a92d887ee3	LibGfx/JPEG2000: Read file structure ... This is enough for `file` to print the dimensions of .jp2 / .jpx files, and for `icc` to print color profile information embedded in the 'colr' box.	2024-03-25 20:35:00 +01:00
Nico Weber	1ab28276f6	LibGfx: Add the start of a JPEG2000 loader ... JPEG2000 is the last image format used in PDF filters that we don't have a loader for. Let's change that. This adds all the scaffolding, but no actual implementation yet.	2024-03-25 20:35:00 +01:00