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backend/drm: re-use FBs

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Instead of importing buffers to GBM and KMS at each frame, cache them
and re-use them while the wlr_buffer is alive.

This is the same as [1] and [2] but for the DRM backend.

[1]: https://github.com/swaywm/wlroots/pull/2538
[2]: https://github.com/swaywm/wlroots/pull/2539
This commit is contained in:
Simon Ser 2020-12-22 18:42:59 +01:00
parent 91cb0fc443
commit d9bbc416a6
4 changed files with 56 additions and 15 deletions
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1
include/backend/drm/drm.h
View file

@ -86,6 +86,7 @@ struct wlr_drm_backend {
struct wl_listener session_active;
struct wl_listener dev_change;
struct wl_list fbs; // wlr_drm_fb.link
struct wl_list outputs;
struct wlr_drm_renderer renderer;

5
include/backend/drm/renderer.h
View file

@ -31,8 +31,12 @@ struct wlr_drm_surface {
struct wlr_drm_fb {
struct wlr_buffer *wlr_buf;
struct wl_list link; // wlr_drm_backend.fbs
struct gbm_bo *bo;
uint32_t id;
struct wl_listener wlr_buf_destroy;
};
bool init_drm_renderer(struct wlr_drm_backend *drm,
@ -47,6 +51,7 @@ bool drm_fb_lock_surface(struct wlr_drm_fb **fb, struct wlr_drm_backend *drm,
bool drm_fb_import(struct wlr_drm_fb **fb, struct wlr_drm_backend *drm,
struct wlr_buffer *buf, struct wlr_drm_surface *mgpu,
const struct wlr_drm_format_set *formats);
void drm_fb_destroy(struct wlr_drm_fb *fb);
void drm_fb_clear(struct wlr_drm_fb **fb);
void drm_fb_move(struct wlr_drm_fb **new, struct wlr_drm_fb **old);