Skip to content
GitLab
Projects Groups Snippets
  • /
  • Help
    • Help
    • Support
    • Community forum
    • Submit feedback
    • Contribute to GitLab
  • Sign in / Register
  • W weston
  • Project information
    • Project information
    • Activity
    • Labels
    • Members
  • Repository
    • Repository
    • Files
    • Commits
    • Branches
    • Tags
    • Contributors
    • Graph
    • Compare
  • Issues 341
    • Issues 341
    • List
    • Boards
    • Service Desk
    • Milestones
  • Merge requests 133
    • Merge requests 133
  • CI/CD
    • CI/CD
    • Pipelines
    • Jobs
    • Schedules
  • Deployments
    • Deployments
    • Releases
  • Packages and registries
    • Packages and registries
    • Container Registry
  • Analytics
    • Analytics
    • Value stream
    • CI/CD
    • Repository
  • Activity
  • Graph
  • Create a new issue
  • Jobs
  • Commits
  • Issue Boards
Collapse sidebar
  • waylandwayland
  • weston
  • Issues
  • #9
Closed
Open
Issue created Mar 15, 2016 by Bugzilla Migration User@bugzilla-migration

Support punch-through underlays in DRM backend

Submitted by Pekka Paalanen @pq

Link to original bug (#7351)

Description

Some hardware supports underlays instead of overlays: YUV hardware plane can only be beneath the (primary) RGB plane. Or perhaps the hardware has several planes and some or all are in fixed z-order. Any planes beneath RGB plane we use as the primary would be currently useless in Weston.

Refererence: https://lists.freedesktop.org/archives/wayland-devel/2016-March/027441.html

Implement support for detecting the cases where using an underlay is possible, beneficial, and which surfaces it would take. Using an underlay also requires the renderer to create a punch-through hole in the primary framebuffer by painting a region as fully transparent.

Ideas: https://lists.freedesktop.org/archives/wayland-devel/2016-March/027451.html

Support for atomic must land in Weston before this task can be started:
https://bugs.freedesktop.org/show_bug.cgi?id=83888

Edited Aug 26, 2022 by Pekka Paalanen
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information
Assignee
Assign to
Time tracking