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stage-impl: Transform damage region before queuing

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In order to queue the right values for transformed `MetaRendererView`s.

While on it ensure we query the framebuffers width/height only once,
saving some cpu cycles.

Closes https://gitlab.gnome.org/GNOME/mutter/-/issues/2557

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2860>
This commit is contained in:
Robert Mader 2023-02-20 02:41:42 +01:00 committed by Marge Bot
parent 7171a41796
commit 943fcc7c1a
2 changed files with 15 additions and 2 deletions
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3
cogl/cogl/cogl-onscreen.h
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@ -230,6 +230,9 @@ cogl_onscreen_get_buffer_age (CoglOnscreen *onscreen);
* This immediately queues state to OpenGL that will be used for the
* next swap.
* This needs to be called every frame.
*
* The expected values are independent of any viewport transforms applied to
* the framebuffer.
*/
COGL_EXPORT void
cogl_onscreen_queue_damage_region (CoglOnscreen *onscreen,

14
src/backends/meta-stage-impl.c
View file

@ -214,6 +214,8 @@ queue_damage_region (ClutterStageWindow *stage_window,
g_autofree int *freeme = NULL;
CoglFramebuffer *framebuffer;
CoglOnscreen *onscreen;
int fb_width;
int fb_height;
if (cairo_region_is_empty (damage_region))
return;
@ -223,6 +225,8 @@ queue_damage_region (ClutterStageWindow *stage_window,
return;
onscreen = COGL_ONSCREEN (framebuffer);
fb_width = cogl_framebuffer_get_width (framebuffer);
fb_height = cogl_framebuffer_get_height (framebuffer);
n_rects = cairo_region_num_rectangles (damage_region);
@ -234,12 +238,18 @@ queue_damage_region (ClutterStageWindow *stage_window,
for (i = 0; i < n_rects; i++)
{
cairo_rectangle_int_t rect;
int height = cogl_framebuffer_get_height (framebuffer);
cairo_region_get_rectangle (damage_region, i, &rect);
clutter_stage_view_transform_rect_to_onscreen (stage_view,
&rect,
fb_width,
fb_height,
&rect);
damage[i * 4] = rect.x;
/* y coordinate needs to be flipped for OpenGL */
damage[i * 4 + 1] = height - rect.y - rect.height;
damage[i * 4 + 1] = fb_height - rect.y - rect.height;
damage[i * 4 + 2] = rect.width;
damage[i * 4 + 3] = rect.height;
}