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scene: try to import buffers as textures before rendering

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The wlroots APIs currently don't allow importing/uploading a buffer
during rendering operations. Scene-graph buffer nodes need to turn
their wlr_buffer into a wlr_texture at some point. It's not always
possible to do so at wlr_scene_buffer creation time because the
scene-graph may have zero outputs at this point, thus no way to
grab a wlr_renderer.

Instead, add scene-graph buffers to a pending list and try to import
them in wlr_scene_output_commit.

References: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3354
This commit is contained in:
Simon Ser 2022-01-18 14:27:37 +01:00 • committed by Kenny Levinsen
parent 3cfe29b598
commit 3db1bcbe64
2 changed files with 18 additions and 0 deletions
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4
include/wlr/types/wlr_scene.h
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@ -68,6 +68,9 @@ struct wlr_scene {
// May be NULL
struct wlr_presentation *presentation;
struct wl_listener presentation_destroy;
// List of buffers which need to be imported as textures
struct wl_list pending_buffers; // wlr_scene_buffer.pending_link
};
/** A sub-tree in the scene-graph. */
@ -114,6 +117,7 @@ struct wlr_scene_buffer {
struct wlr_fbox src_box;
int dst_width, dst_height;
enum wl_output_transform transform;
struct wl_list pending_link; // wlr_scene.pending_buffers
};
/** A viewport for an output in the scene-graph */