mirrors/labwc
1
0
Fork 0
mirror of https://github.com/labwc/labwc.git synced 2025-11-01 22:58:47 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

scaled_scene_buffer: make dropping the buffer optional

Browse source 
In preparation to also use the scaled_scene_buffer for
theme components like rounded corner images and button
icons.

No functional change intended.
This commit is contained in:
Consolatis 2023-10-14 22:26:40 +02:00 • committed by Johan Malm
parent 7aa540b8ab
commit 8d17ab2d60
4 changed files with 51 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

2
include/common/scaled_font_buffer.h
View file

@ -6,7 +6,7 @@
struct wlr_scene_tree;
struct wlr_scene_buffer;
struct scaled_scene_buffere;
struct scaled_scene_buffer;
struct scaled_font_buffer {
struct wlr_scene_buffer *scene_buffer;

27
include/common/scaled_scene_buffer.h
View file

@ -26,6 +26,7 @@ struct scaled_scene_buffer {
void *data; /* opaque user data */
/* Private */
bool drop_buffer;
double active_scale;
struct wl_list cache; /* struct scaled_buffer_cache_entry.link */
struct wl_listener destroy;
@ -51,10 +52,34 @@ struct scaled_scene_buffer {
* wlr_scene_buffer is being destroyed. If implementation->destroy is set
* it will also get called so a consumer of this API may clean up its own
* allocations.
*
* All requested lab_data_buffers via impl->create_buffer() will be locked
* during the lifetime of the buffer in the internal cache and unlocked
* when being evacuated from the cache (due to LAB_SCALED_BUFFER_MAX_CACHE
* or the internal wlr_scene_buffer being destroyed).
*
* If drop_buffer was set during creation of the scaled_scene_buffer, the
* backing wlr_buffer behind a lab_data_buffer will also get dropped
* (via wlr_buffer_drop). If there are no more locks (consumers) of the
* respective buffer this will then cause the lab_data_buffer to be free'd.
*
* In the case of the buffer provider dropping the buffer itself (due to
* for example a Reconfigure event) the lock prevents the buffer from being
* destroyed until the buffer is evacuated from the internal cache and thus
* unlocked.
*
* This allows using scaled_scene_buffer for an autoscaling font_buffer
* (which gets free'd automatically) and also for theme components like
* rounded corner images or button icons whose buffers only exist once but
* are references by multiple windows with their own scaled_scene_buffers.
*
* The rough idea is: use drop_buffer = true for one-shot buffers and false
* for buffers that should outlive the scaled_scene_buffer instance itself.
*/
struct scaled_scene_buffer *scaled_scene_buffer_create(
struct wlr_scene_tree *parent,
const struct scaled_scene_buffer_impl *implementation);
const struct scaled_scene_buffer_impl *implementation,
bool drop_buffer);
/* Clear the cache of existing buffers, useful in case the content changes */
void scaled_scene_buffer_invalidate_cache(struct scaled_scene_buffer *self);