sub: add option to not scale subtitles with window

--sub-scale-by-window=no attempts to keep subs always at the same pixel
size.

The implementation is a bit all over the place, because it compensates
already done scaling by an inverse scale factor, but it will probably do
its job.

Fixes #1424. (The semantics and name of --sub-scale-with-window are
kept, and this adds a new option - the name is confusingly similar, but
it's actually analogue to --osd-scale-by-window.)

1 files changed, 2 insertions, 1 deletions

diff --git a/options/options.h b/options/options.h
index 5e24a20d1d..1664c3a443 100644
--- a/options/options.h
+++ b/options/options.h
@@ -235,6 +235,8 @@ typedef struct MPOpts {
     float osd_bar_h;
     float osd_scale;
     int osd_scale_by_window;
+    int sub_scale_by_window;
+    int sub_scale_with_window;
     struct osd_style_opts *osd_style;
     struct osd_style_opts *sub_text_style;
     float sub_scale;
@@ -252,7 +254,6 @@ typedef struct MPOpts {
     int ass_style_override;
     int ass_hinting;
     int ass_shaper;
-    int sub_scale_with_window;
     int sub_clear_on_seek;
 
     int hwdec_api;