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clutter/stage-view: Use cogl_blit_framebuffer() for shadow FB

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If there is no transformation, use `cogl_blit_framebuffer()` as a
shortcut in `clutter_stage_view_blit_offscreen()`, that dramatically
improves performance when using a shadow framebuffer.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/809
This commit is contained in:
Olivier Fourdan 2019-09-26 10:20:36 +02:00 committed by Jonas Ådahl
parent 25c1a85384
commit 05e1a6c2ca
1 changed files with 12 additions and 0 deletions
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12
clutter/clutter/clutter-stage-view.c
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@ -143,6 +143,18 @@ clutter_stage_view_blit_offscreen (ClutterStageView *view,
clutter_stage_view_get_instance_private (view);
CoglMatrix matrix;
clutter_stage_view_get_offscreen_transformation_matrix (view, &matrix);
if (cogl_matrix_is_identity (&matrix))
{
if (cogl_blit_framebuffer (priv->offscreen,
priv->framebuffer,
rect->x, rect->y,
rect->x, rect->y,
rect->width, rect->height,
NULL))
return;
}
clutter_stage_view_ensure_offscreen_blit_pipeline (view);
cogl_framebuffer_push_matrix (priv->framebuffer);