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onscreen/native: Remove a goto in DisplayLink fallback

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At first glance the `goto` looks like a loop, or potentially an infinite
loop. It's not a loop because the mode has changed at that point to
`META_SHARED_FRAMEBUFFER_COPY_MODE_PRIMARY`. But we can make it more
obvious and avoid the need for a goto.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2240>
This commit is contained in:
Daniel van Vugt 2022-01-17 17:23:45 +08:00 committed by Marge Bot
parent 35fa75a085
commit 6673fbcf68
1 changed files with 9 additions and 21 deletions
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30
src/backends/native/meta-onscreen-native.c
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@ -597,20 +597,6 @@ import_shared_framebuffer (CoglOnscreen *onscreen,
g_warn_if_fail (secondary_gpu_state->import_status ==
META_SHARED_FRAMEBUFFER_IMPORT_STATUS_NONE);
/*
* Fall back. If META_SHARED_FRAMEBUFFER_IMPORT_STATUS_NONE is
* in effect, we have COPY_MODE_PRIMARY prepared already, so we
* simply retry with that path. Import status cannot be FAILED,
* because we should not retry if failed once.
*
* If import status is OK, that is unexpected and we do not
* have the fallback path prepared which means this output cannot
* work anymore.
*/
secondary_gpu_state->renderer_gpu_data->secondary.copy_mode =
META_SHARED_FRAMEBUFFER_COPY_MODE_PRIMARY;
secondary_gpu_state->import_status =
META_SHARED_FRAMEBUFFER_IMPORT_STATUS_FAILED;
return FALSE;
@ -993,13 +979,18 @@ update_secondary_gpu_state_post_swap_buffers (CoglOnscreen *onscreen,
renderer_gpu_data =
meta_renderer_native_get_gpu_data (renderer_native,
secondary_gpu_state->gpu_kms);
retry:
switch (renderer_gpu_data->secondary.copy_mode)
{
case META_SHARED_FRAMEBUFFER_COPY_MODE_ZERO:
if (!import_shared_framebuffer (onscreen,
secondary_gpu_state))
goto retry;
if (import_shared_framebuffer (onscreen, secondary_gpu_state))
break;
/* The fallback was prepared in pre_swap_buffers */
renderer_gpu_data->secondary.copy_mode =
META_SHARED_FRAMEBUFFER_COPY_MODE_PRIMARY;
G_GNUC_FALLTHROUGH;
case META_SHARED_FRAMEBUFFER_COPY_MODE_PRIMARY:
/* Done before eglSwapBuffers. */
break;
case META_SHARED_FRAMEBUFFER_COPY_MODE_SECONDARY_GPU:
copy_shared_framebuffer_gpu (onscreen,
@ -1007,9 +998,6 @@ retry:
renderer_gpu_data,
egl_context_changed);
break;
case META_SHARED_FRAMEBUFFER_COPY_MODE_PRIMARY:
/* Done before eglSwapBuffers. */
break;
}
}
}