stop exporting lookup_blitset()

the media code that makes up non-core libnotcurses called
into lookup_rgba(). instead, have them use the new
funtion ncvisual_blitter_geom() to access the actual blitter
being used. we can then hide lookup_blitset(), which ought
never have been exported. closes #1519.

src/lib/internal.h

@@ -1413,7 +1413,7 @@ int kitty_blit(ncplane* nc, int linesize, const void* data,
 int term_fg_rgb8(bool RGBflag, const char* setaf, int colors, FILE* out,
                  unsigned r, unsigned g, unsigned b);
 
-API const struct blitset* lookup_blitset(const tinfo* tcache, ncblitter_e setid, bool may_degrade);
+const struct blitset* lookup_blitset(const tinfo* tcache, ncblitter_e setid, bool may_degrade);
 
 static inline int
 rgba_blit_dispatch(ncplane* nc, const struct blitset* bset,

src/media/ffmpeg.c

@@ -402,10 +402,7 @@ int ffmpeg_stream(notcurses* nc, ncvisual* ncv, float timescale,
     }
     // decay the blitter explicitly, so that the callback knows the blitter it
     // was actually rendered with
-    const struct blitset* bset = rgba_blitter(nc, &activevopts);
-    if(bset){
-      activevopts.blitter = bset->geom;
-    }
+    ncvisual_blitter_geom(nc, ncv, &activevopts, NULL, NULL, NULL, NULL, &activevopts.blitter);
     if((newn = ncvisual_render(nc, ncv, &activevopts)) == NULL){
       if(activevopts.n != vopts->n){
         ncplane_destroy(activevopts.n);

src/media/oiio-indep.c

@@ -27,10 +27,7 @@ int oiio_stream(struct notcurses* nc, ncvisual* ncv, float timescale,
   do{
     // decay the blitter explicitly, so that the callback knows the blitter it
     // was actually rendered with
-    const struct blitset* bset = rgba_blitter(nc, &activevopts);
-    if(bset){
-      activevopts.blitter = bset->geom;
-    }
+    ncvisual_blitter_geom(nc, ncv, &activevopts, NULL, NULL, NULL, NULL, &activevopts.blitter);
     if((newn = ncvisual_render(nc, ncv, &activevopts)) == NULL){
       if(activevopts.n != vopts->n){
         ncplane_destroy(activevopts.n);

src/player/play.cpp

@@ -160,6 +160,8 @@ auto perframe(struct ncvisual* ncv, struct ncvisual_options* vopts,
         notcurses_check_pixel_support(nc);
       }
       continue;
+    }else if(keyp >= '7' && keyp <= '9' && !ni.alt && !ni.ctrl){
+      continue; // don't error out
     }else if(keyp == NCKey::Up){
       // FIXME move backwards significantly
       continue;
@@ -396,7 +398,8 @@ int rendered_mode_player_inner(NotCurses& nc, int argc, char** argv,
               nc.refresh(nullptr, nullptr);
             }else if(ie >= '0' && ie <= '6'){
               --i; // rerun same input with the new blitter
-              vopts.blitter = blitter = static_cast<ncblitter_e>(ie - '0');
+            }else if(ie >= '7' && ie <= '9'){
+              --i; // just absorb the input
             }else if(ie == NCKey::Resize){
               --i; // rerun with the new size
               if(!nc.refresh(&dimy, &dimx)){