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draw_bmp: add a function to return a single-texture OSD overlay

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Maybe this is useful for some of the lesser VOs. It's preferable over
bad ad-hoc solutions based on the more complex sub_bitmap data
structures (as observed e.g. in vo_vaapi.c), and does not use that much
more code since draw_bmp already created such an overlay internally.

But I still wanted something that avoids having to upload/render a full
screen-sized overlay if for example there's only a tiny subtitle line on
the bottom of the screen. So the new API can return a list of modified
pixels (for upload) and non-transparent pixels (for display). The way
these pixel rectangles are computed is a bit dumb and returns dumb
results, but it should be usable, and the implementation can change.
This commit is contained in:
wm4
2020-05-11 19:51:32 +02:00
parent 6db890ebab
commit 55e1f15cdb
4 changed files with 266 additions and 51 deletions
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4
test/repack.c
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@@ -365,8 +365,8 @@ static bool try_draw_bmp(FILE *f, int imgfmt)
.num_items = 1,
};
struct mp_draw_sub_cache *c = NULL;
if (mp_draw_sub_bitmaps(&c, dst, &sbs_list)) {
struct mp_draw_sub_cache *c = mp_draw_sub_alloc(NULL);
if (mp_draw_sub_bitmaps(c, dst, &sbs_list)) {
char *info = mp_draw_sub_get_dbg_info(c);
fprintf(f, "%s\n", info);
talloc_free(info);