1 files changed, 63 insertions, 0 deletions
diff --git a/sub/draw_bmp.h b/sub/draw_bmp.h
new file mode 100644
index 0000000..fda7797
--- /dev/null
+++ b/sub/draw_bmp.h
@@ -0,0 +1,63 @@
+#ifndef MPLAYER_DRAW_BMP_H
+#define MPLAYER_DRAW_BMP_H
+
+#include "osd.h"
+
+struct mp_rect;
+struct mp_image;
+struct mpv_global;
+struct mp_draw_sub_cache;
+
+struct mp_draw_sub_cache *mp_draw_sub_alloc(void *ta_parent, struct mpv_global *g);
+
+// Only for use in tests.
+struct mp_draw_sub_cache *mp_draw_sub_alloc_test(struct mp_image *dst);
+
+// Render the sub-bitmaps in sbs_list to dst. sbs_list must have been rendered
+// for an OSD resolution equivalent to dst's size (UB if not).
+// Warning: if dst is a format with alpha, and dst is not set to MP_ALPHA_PREMUL
+//          (not done by default), this will be extremely slow.
+// Warning: the caller is responsible for ensuring that dst is writable.
+//  cache: allocated instance; caches non-changing OSD parts etc.
+//  dst: image to draw to
+//  sbs_list: source sub-bitmaps
+//  returns: success
+bool mp_draw_sub_bitmaps(struct mp_draw_sub_cache *cache, struct mp_image *dst,
+                         struct sub_bitmap_list *sbs_list);
+
+char *mp_draw_sub_get_dbg_info(struct mp_draw_sub_cache *c);
+
+// Return a RGBA overlay with subtitles. The returned image uses IMGFMT_BGRA and
+// premultiplied alpha, and the size specified by sbs_list.w/h.
+// This can return a list of active (act_) and modified (mod_) rectangles.
+// Active rectangles are regions that contain visible OSD pixels. Modified
+// rectangles are regions that were changed since the last call. This function
+// always makes the act region a subset of the mod region. Rectangles within a
+// list never overlap with rectangles within the same list.
+// If num_mod_rcs==0 is returned, this function guarantees that the act region
+// did not change since the last call.
+// If the user-provided lists are too small (max_*_rcs too small), multiple
+// rectangles are merged until they fit in the list.
+// You can pass max_act_rcs=0, which implies you render the whole overlay.
+//  cache: allocated instance; keeps track of changed regions
+//  sbs_list: source sub-bitmaps
+//  act_rcs: caller allocated list of non-transparent rectangles
+//  max_act_rcs: number of allocated items in act_rcs
+//  num_act_rcs: set to the number of valid items in act_rcs
+//  mod_rcs, max_mod_rcs, num_mod_rcs: modified rectangles
+//  returns: internal OSD overlay owned by cache, NULL on error
+//           read only, valid until the next call on cache
+struct mp_image *mp_draw_sub_overlay(struct mp_draw_sub_cache *cache,
+                                     struct sub_bitmap_list *sbs_list,
+                                     struct mp_rect *act_rcs,
+                                     int max_act_rcs,
+                                     int *num_act_rcs,
+                                     struct mp_rect *mod_rcs,
+                                     int max_mod_rcs,
+                                     int *num_mod_rcs);
+
+extern const bool mp_draw_sub_formats[SUBBITMAP_COUNT];
+
+#endif /* MPLAYER_DRAW_BMP_H */
+
+// vim: ts=4 sw=4 et tw=80