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drm-backend/gl-renderer: move fully transparent check into paint node

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Video underlay "holes" are fully transparent but must be rendered
fully opaque. However, they appear to be fully transparent to
the current gl-renderer test which is missing a need_hole check.

Add a paint node attribute for this so it can be more easily
checked in assign_planes and renderers.

Signed-off-by: Derek Foreman <derek.foreman@collabora.com>
This commit is contained in:
Derek Foreman 2025-10-15 14:58:06 -05:00
parent 99ab4ceaca
commit 25a281a0a8
4 changed files with 15 additions and 4 deletions
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3
libweston/backend-drm/state-propose.c
View file

@ -876,8 +876,7 @@ drm_output_propose_state(struct weston_output *output_base,
continue; continue;
} }
if (pnode->view->alpha == 0.0f || if (pnode->is_fully_transparent) {
(pnode->draw_solid && pnode->solid.a == 0.0f)) {
drm_debug(b, "\t\t\t\t[view] ignoring view %p " \ drm_debug(b, "\t\t\t\t[view] ignoring view %p " \
"(fully transparent)\n", ev); "(fully transparent)\n", ev);
continue; continue;

7
libweston/compositor.c
View file

@ -226,13 +226,19 @@ paint_node_update_early(struct weston_paint_node *pnode)
buffer = pnode->surface->buffer_ref.buffer; buffer = pnode->surface->buffer_ref.buffer;
pnode->draw_solid = false; pnode->draw_solid = false;
pnode->is_fully_transparent = false;
if (buffer->type == WESTON_BUFFER_SOLID) { if (buffer->type == WESTON_BUFFER_SOLID) {
pnode->draw_solid = true; pnode->draw_solid = true;
pnode->is_fully_opaque = (buffer->solid.a == 1.0f); pnode->is_fully_opaque = (buffer->solid.a == 1.0f);
pnode->is_fully_blended = !pnode->is_fully_opaque; pnode->is_fully_blended = !pnode->is_fully_opaque;
pnode->solid = buffer->solid; pnode->solid = buffer->solid;
if (pnode->solid.a == 0.0f)
pnode->is_fully_transparent = true;
} }
if (pnode->view->alpha == 0.0f)
pnode->is_fully_transparent = true;
/* Check for 2 types of censor requirements /* Check for 2 types of censor requirements
* - recording_censor: Censor protected view when a * - recording_censor: Censor protected view when a
* protected view is captured. * protected view is captured.
@ -326,6 +332,7 @@ paint_node_update_late(struct weston_paint_node *pnode)
pnode->draw_solid = true; pnode->draw_solid = true;
pnode->is_fully_opaque = true; pnode->is_fully_opaque = true;
pnode->is_fully_blended = false; pnode->is_fully_blended = false;
pnode->is_fully_transparent = false;
pnode->solid = (struct weston_solid_buffer_values) { pnode->solid = (struct weston_solid_buffer_values) {
0.0, 0.0, 0.0, 0.0 0.0, 0.0, 0.0, 0.0
}; };

6
libweston/libweston-internal.h
View file

@ -724,6 +724,12 @@ struct weston_paint_node {
bool is_fully_opaque; bool is_fully_opaque;
bool is_fully_blended; bool is_fully_blended;
bool draw_solid; bool draw_solid;
/* This node's buffer or view alpha causes it to be completely
* transparent, so it can be optimized away or skipped for
* plane assignment.
*/
bool is_fully_transparent;
struct weston_solid_buffer_values solid; struct weston_solid_buffer_values solid;
bool need_hole; bool need_hole;
uint32_t psf_flags; /* presentation-feedback flags */ uint32_t psf_flags; /* presentation-feedback flags */

3
libweston/renderer-gl/gl-renderer.c
View file

@ -2070,8 +2070,7 @@ draw_paint_node(struct weston_paint_node *pnode,
if (!pixman_region32_not_empty(&repaint)) if (!pixman_region32_not_empty(&repaint))
goto out; goto out;
if (pnode->view->alpha == 0.0f || if (pnode->is_fully_transparent) {
(pnode->draw_solid && pnode->solid.a == 0.0f)) {
gs->used_in_output_repaint = true; /* sort of */ gs->used_in_output_repaint = true; /* sort of */
goto out; goto out;
} }