GitLab

* Add BGR(A) to pixel_traits

* add support for reading webp

* Apply Davis' suggestions and fix formatting

* Fix signed/unsigned warning

* Update decoding paths

* update pixel traits documentation

* Add support for writing WebP images

* Simplify image_saver code

* WIP: add tests, PSNR is low but images look good

* Add lossless compression for quality > 100

* Fix build when WebP support is disabled

* Use C++ stream instead of C-style FILE

* Fix indentation

* Use reinterpret_cast instead of C-style cast

* Improve impl::impl_save_webp signature

* Remove empty line

* Use switch statement and clean up code

* Update Copyright and test libwebp on Linux

* Fix formatting in github workflow

* Fix operator== for bgr_alpha_pixel

* Show where the test fails

* Add libwebp to CI for the remaining Linux workflows

* Use filename consistently

* Improve message with wrong pixel type

* Fix tests for WebP images

* Prevent saving images which are too large and improve error messages

* Use max dimension from WebP header directly

* Update documentation, index and release notes

* Update dlib/image_saver/save_webp_abstract.h
Co-authored-by: Martin T. H. Sandsmark <martin.sandsmark@kde.org>
Co-authored-by: Davis E. King <davis685@gmail.com>