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buffer: replace get_data_ptr with {begin,end}_data_ptr_access

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This new API allows buffer implementations to know when a user is
actively accessing the buffer's underlying storage. This is
important for the upcoming client-backed wlr_buffer implementation.
This commit is contained in:
Simon Ser 2021-06-02 17:02:28 +02:00 • committed by Simon Zeni
parent 9e58301df7
commit 38ba5881a0
7 changed files with 79 additions and 18 deletions
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11
render/shm_allocator.c
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@ -31,8 +31,8 @@ static bool buffer_get_shm(struct wlr_buffer *wlr_buffer,
return true;
}
static bool shm_buffer_get_data_ptr(struct wlr_buffer *wlr_buffer, void **data,
uint32_t *format, size_t *stride) {
static bool shm_buffer_begin_data_ptr_access(struct wlr_buffer *wlr_buffer,
void **data, uint32_t *format, size_t *stride) {
struct wlr_shm_buffer *buffer = shm_buffer_from_buffer(wlr_buffer);
*data = buffer->data;
*format = buffer->shm.format;
@ -40,10 +40,15 @@ static bool shm_buffer_get_data_ptr(struct wlr_buffer *wlr_buffer, void **data,
return true;
}
static void shm_buffer_end_data_ptr_access(struct wlr_buffer *wlr_buffer) {
// This space is intentionally left blank
}
static const struct wlr_buffer_impl buffer_impl = {
.destroy = buffer_destroy,
.get_shm = buffer_get_shm,
.get_data_ptr = shm_buffer_get_data_ptr,
.begin_data_ptr_access = shm_buffer_begin_data_ptr_access,
.end_data_ptr_access = shm_buffer_end_data_ptr_access,
};
static struct wlr_buffer *allocator_create_buffer(