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render: add WLR_RENDER_NO_EXPLICIT_SYNC env var

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This can be handy to figure out if a bug is due to explicit sync.
This commit is contained in:
Simon Ser 2024-08-04 16:23:53 +02:00
parent 738bbf01ee
commit 775817e278
2 changed files with 5 additions and 0 deletions
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2
docs/env_vars.md
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@ -12,6 +12,8 @@ wlroots reads these environment variables
renderers: gles2, pixman, vulkan)
* *WLR_RENDER_DRM_DEVICE*: specifies the DRM node to use for
hardware-accelerated renderers.
* *WLR_RENDER_NO_EXPLICIT_SYNC*: set to 1 to disable explicit synchronization
support in renderers.
* *WLR_EGL_NO_MODIFIERS*: set to 1 to disable format modifiers in EGL, this can
be used to understand and work around driver bugs.

3
render/wlr_renderer.c
View file

@ -274,6 +274,9 @@ out:
if (own_drm_fd && drm_fd >= 0) {
close(drm_fd);
}
if (renderer != NULL && env_parse_bool("WLR_RENDER_NO_EXPLICIT_SYNC")) {
renderer->features.timeline = false;
}
return renderer;
}