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onscreen/native: Warn expecting next buffer on symoblic page flip

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If we get a "ready" page flip feedback, it means the page flip was
symbolic, i.e. not real, e.g. as a result of an update that didn't
change the state of the primary plane. Warn if there is a "next fb"
meaning we expected to have a new buffer that we flipped to.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2854>
This commit is contained in:
Jonas Ådahl 2022-06-10 18:21:18 +02:00 committed by Marge Bot
parent af5d67251b
commit f6b75eef19
1 changed files with 3 additions and 0 deletions
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3
src/backends/native/meta-onscreen-native.c
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@ -269,11 +269,14 @@ page_flip_feedback_ready (MetaKmsCrtc *kms_crtc,
CoglFramebuffer *framebuffer =
clutter_stage_view_get_onscreen (CLUTTER_STAGE_VIEW (view));
CoglOnscreen *onscreen = COGL_ONSCREEN (framebuffer);
MetaOnscreenNative *onscreen_native = META_ONSCREEN_NATIVE (onscreen);
CoglFrameInfo *frame_info;
frame_info = cogl_onscreen_peek_head_frame_info (onscreen);
frame_info->flags |= COGL_FRAME_INFO_FLAG_SYMBOLIC;
g_warn_if_fail (!onscreen_native->gbm.next_fb);
meta_onscreen_native_notify_frame_complete (onscreen);
}