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meta: document fields some more

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This commit is contained in:
Wim Taymans 2019-01-03 17:18:12 +01:00
parent 2a252abf50
commit 8984c6f48d
1 changed files with 13 additions and 4 deletions
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17
spa/include/spa/buffer/meta.h
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@ -101,10 +101,15 @@ struct spa_meta_region {
* better transfered inline.
*/
struct spa_meta_bitmap {
uint32_t format; /**< bitmap video format, one of enum spa_video_format */
uint32_t format; /**< bitmap video format, one of enum spa_video_format. 0 is
* and invalid format and should be handled as if there is
* no new bitmap information. */
struct spa_rectangle size; /**< width and height of bitmap */
int32_t stride; /**< stride of bitmap data */
uint32_t offset; /**< offset of bitmap data in this structure */
uint32_t offset; /**< offset of bitmap data in this structure. An offset of
* 0 means no image data (invisible), an offset >=
* sizeof(struct spa_meta_bitmap) contains valid bitmap
* info. */
};
#define spa_meta_cursor_is_valid(m) ((m)->id != 0)
@ -115,11 +120,15 @@ struct spa_meta_bitmap {
* Metadata to describe the position and appearance of a pointing device.
*/
struct spa_meta_cursor {
uint32_t id; /**< cursor id */
uint32_t id; /**< cursor id. an id of 0 is an invalid id and means that
* there is no new cursor data */
uint32_t flags; /**< extra flags */
struct spa_point position; /**< position on screen */
struct spa_point hotspot; /**< offsets for hotspot in bitmap */
uint32_t bitmap_offset; /**< offset of bitmap meta in this structure */
uint32_t bitmap_offset; /**< offset of bitmap meta in this structure. When the offset
* is 0, there is no new bitmap information. When the offset is
* >= sizeof(struct spa_meta_cursor) there is a
* struct spa_meta_bitmap at the offset. */
};
#ifdef __cplusplus