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Status update, May 2023

Hi all!

This status update comes in a bit late because I was on leave last week. The highlight this month is the HDR hackfest, I’ve written a dedicated blog post about it. After the publication of that blog post, I’ve sent out an RFC to dri-devel.

We’ve made some good progress on wlroots’ Vulkan renderer. Manuel Stoeckl has added support for an intermediate buffer for blending, which is required for non-8-bit output formats and for color management features. The renderer now has an optional extra rendering pass to run a shader after blending. This is currently used to encode color values to sRGB, and will be used in the future to apply ICC profiles and to perform color space conversions. I’ve added support for the NV12 DMA-BUF format, support for more YCbCr formats is in a merge request.

The new cursor-shape-v1 protocol has been merged in wayland-protocols thanks to KDE and winit folks. Traditionally Wayland clients needed to load XCursor themes and submit these as wl_shm buffers to the compositor. However there are a few downsides: there is no mechanism to configure the theme that gets loaded, the theme cannot be changed on-the-fly, there is no way to configure separate themes per seat, and loading cursors slows down client startup. The cursor-shape-v1 protocol allows clients to set a cursor image by its name instead of using wl_shm buffers.

I’ve worked on adding a new mode to wayland-scanner to generate enums only. This is useful for libraries like wlroots which use C enums generated from protocol XML in their public headers. We plan to ship these headers as part of a wayland-protocols installation.

To wrap up this status update, let’s mention a few updates for miscellaneous projects. A handful of new formats have been added to pixfmtdb. gqlclient now handles GraphQL interfaces correctly and generates methods to unwrap the underlying type. This is now used in hut to show ticket comments, among other things. go-imap now supports SEARCHRES, LITERAL+, and features a simplified API for STATUS commands.

See you next month!


Questions, comments? Please use my public inbox by sending a plain-text email to ~emersion/public-inbox@lists.sr.ht.

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