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mpv/sub/osd_state.h
wm4 51befc9deb osd: simplify an aspect of change detection handling
There was a somewhat obscure optimization in the OSD and subtitle
rendering path: if only the position of the sub-images changed, and not
the actual image data, uploading of the image data could be skipped. In
theory, this could speed up things like scrolling subtitles.

But it turns out that even in the rare cases subtitles have such scrolls
or axis-aligned movement, modern libass rarely signals this kind of
change. Possibly this is because of sub-pixel handling and such, which
break this.

As such, it's a worthless optimization and just introduces additional
complexity and subtle bugs (especially in cases libass does the
opposite: incorrectly signaling a position change only, which happened
before). Remove this optimization, and rename bitmap_pos_id to
change_id.
2015-03-18 13:15:20 +01:00

66 lines
1.3 KiB
C

#ifndef MP_OSD_STATE_H_
#define MP_OSD_STATE_H_
#include <pthread.h>
#include "osd.h"
#define OSD_CONV_CACHE_MAX 4
struct osd_object {
int type; // OSDTYPE_*
bool is_sub;
bool force_redraw;
// OSDTYPE_SUB/OSDTYPE_SUB2/OSDTYPE_OSD/OSDTYPE_EXTERNAL
char *text;
// OSDTYPE_PROGBAR
struct osd_progbar_state progbar_state;
// OSDTYPE_SUB/OSDTYPE_SUB2
struct osd_sub_state sub_state;
// OSDTYPE_EXTERNAL
int external_res_x, external_res_y;
// OSDTYPE_EXTERNAL2
struct sub_bitmaps *external2;
// OSDTYPE_NAV_HIGHLIGHT
void *highlight_priv;
// caches for OSD conversion (internal to render_object())
struct osd_conv_cache *cache[OSD_CONV_CACHE_MAX];
struct sub_bitmaps cached;
// VO cache state
int vo_change_id;
struct mp_osd_res vo_res;
// Internally used by osd_libass.c
struct sub_bitmap *parts_cache;
struct ass_track *osd_track;
struct ass_renderer *osd_render;
struct ass_library *osd_ass_library;
};
struct osd_state {
pthread_mutex_t lock;
struct osd_object *objs[MAX_OSD_PARTS];
bool render_subs_in_filter;
bool want_redraw;
struct MPOpts *opts;
struct mpv_global *global;
struct mp_log *log;
struct mp_draw_sub_cache *draw_cache;
};
#endif