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buffer: introduce wlr_buffer_get_shm 

References: https://github.com/swaywm/wlroots/issues/2399#issuecomment-769408708
This commit is contained in:
Simon Ser 2021-02-09 21:07:10 +01:00
parent 0b9288ec0b
commit 6c61de996c
2 changed files with 27 additions and 0 deletions
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19
include/wlr/types/wlr_buffer.h
View File

@ -15,12 +15,21 @@
struct wlr_buffer;
struct wlr_shm_attributes {
int fd;
uint32_t format;
int width, height, stride;
off_t offset;
};
struct wlr_buffer_impl {
void (*destroy)(struct wlr_buffer *buffer);
bool (*get_dmabuf)(struct wlr_buffer *buffer,
struct wlr_dmabuf_attributes *attribs);
bool (*get_data_ptr)(struct wlr_buffer *buffer, void **data,
size_t *stride);
bool (*get_shm)(struct wlr_buffer *buffer,
struct wlr_shm_attributes *attribs);
};
/**
@ -78,6 +87,16 @@ void wlr_buffer_unlock(struct wlr_buffer *buffer);
*/
bool wlr_buffer_get_dmabuf(struct wlr_buffer *buffer,
struct wlr_dmabuf_attributes *attribs);
/**
* Read shared memory attributes of the buffer. If this buffer isn't shared
* memory, returns false.
*
* The returned shared memory attributes are valid for the lifetime of the
* wlr_buffer. The caller isn't responsible for cleaning up the shared memory
* attributes.
*/
bool wlr_buffer_get_shm(struct wlr_buffer *buffer,
struct wlr_shm_attributes *attribs);
/**
* A client buffer.

8
types/wlr_buffer.c
View File

@ -74,6 +74,14 @@ bool buffer_get_data_ptr(struct wlr_buffer *buffer, void **data,
return buffer->impl->get_data_ptr(buffer, data, size);
}
bool wlr_buffer_get_shm(struct wlr_buffer *buffer,
struct wlr_shm_attributes *attribs) {
if (!buffer->impl->get_shm) {
return false;
}
return buffer->impl->get_shm(buffer, attribs);
}
bool wlr_resource_is_buffer(struct wl_resource *resource) {
return strcmp(wl_resource_get_class(resource), wl_buffer_interface.name) == 0;
}