Jay 1.10.0

• Various bugfixes.

• Implement cursor-shape-v1 version 2.

• Implement xdg-shell version 7.

• Implement color-management-v1.

  This release adds support for color management if the vulkan renderer is used
  and the vulkan driver supports the VK_EXT_descriptor_buffer extension. Color
  management is not available with the opengl renderer.

  There are two limitations:

  • No tone mapping is performed. That is, HDR content that is brighter than
    what the framebuffer can store will be clipped.
  • No gamut mapping is performed. That is, content that is more colorful than
    what the framebuffer can store will be clipped.

  The color management protocol is disabled by default. You can enable it on the
  command line via jay color-management enable or in the config file via
  color-management.enabled = true. If you are not using an OLED display, you
  probably want to keep it disabled and instead rely on the tone mapping
  performed by applications such as mpv. Changing this setting usually requires
  applications to be restarted.

  You can use this application to test various settings:
  https://github.com/mahkoh/wayland-color-test

• Outputs can now optionally use the BT.2020/PQ color space.

  On the command line this can be controlled via
  jay randr output <OUTPUT> colors .... In the config file it can be
  controlled via the color-space and transfer-function fields in the output
  configuration.

  When using the PQ transfer function, the output should also be configured to
  use at least a 10 bpc framebuffer format.

• The reference brightness of outputs can now be configured via
  jay randr output <OUTPUT> brightness ... or in the config file via the
  brightness field in the output configuration.

  This is primarily useful when using the PQ transfer function and the display
  does not support configuring the brightness via its hardware overlay.

  This configuration has no effect unless the vulkan renderer is used and the
  vulkan driver supports the VK_EXT_descriptor_buffer extension.

• The vulkan renderer has been significantly improved to ensure high performance
  even with color management enabled:

  • VK_EXT_descriptor_buffer is used if available.
  • Only the damaged areas of the screen are rendered.
  • Draw calls are instanced so that only one draw call is required per texture
    even if there are multiple small damage areas.
  • Blending is now performed with a dedicated 16 bpc texture in linear space.
  • The blend buffer is deduplicated between outputs with the same size.
  • Areas of the screen where the topmost texture is opaque bypass the blend
    buffer and render directly to the frame buffer.