diff options
| -rw-r--r-- | doc/filters.texi | 3 | ||||
| -rw-r--r-- | libavfilter/vf_drawtext.c | 17 |
2 files changed, 14 insertions, 6 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index 4e7ede23..16059fd 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -598,6 +598,9 @@ libfreetype flags. @item tabsize The size in number of spaces to use for rendering the tab. Default value is 4. + +@item fix_bounds +If true, check and fix text coords to avoid clipping. @end table For example the command: diff --git a/libavfilter/vf_drawtext.c b/libavfilter/vf_drawtext.c index f6ce124..5b794dc 100644 --- a/libavfilter/vf_drawtext.c +++ b/libavfilter/vf_drawtext.c @@ -122,6 +122,7 @@ typedef struct { short int draw_box; ///< draw box around text - true or false int use_kerning; ///< font kerning is used - true/false int tabsize; ///< tab size + int fix_bounds; ///< do we let it go out of frame bounds - t/f FT_Library library; ///< freetype font library handle FT_Face face; ///< freetype font face handle @@ -157,6 +158,8 @@ static const AVOption drawtext_options[]= { {"shadowy", "set y", OFFSET(shadowy), AV_OPT_TYPE_INT, {.dbl=0}, INT_MIN, INT_MAX }, {"tabsize", "set tab size", OFFSET(tabsize), AV_OPT_TYPE_INT, {.dbl=4}, 0, INT_MAX }, {"draw", "if false do not draw", OFFSET(d_expr), AV_OPT_TYPE_STRING, {.str="1"}, CHAR_MIN, CHAR_MAX }, +{"fix_bounds", "if true, check and fix text coords to avoid clipping", + OFFSET(fix_bounds), AV_OPT_TYPE_INT, {.dbl=1}, 0, 1 }, /* FT_LOAD_* flags */ {"ft_load_flags", "set font loading flags for libfreetype", OFFSET(ft_load_flags), AV_OPT_TYPE_FLAGS, {.dbl=FT_LOAD_DEFAULT|FT_LOAD_RENDER}, 0, INT_MAX, 0, "ft_load_flags" }, @@ -828,12 +831,14 @@ static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *inpicref) normalize_double(&dtext->x, dtext->var_values[VAR_X]); normalize_double(&dtext->y, dtext->var_values[VAR_Y]); - if (dtext->x < 0) dtext->x = 0; - if (dtext->y < 0) dtext->y = 0; - if ((unsigned)dtext->x + (unsigned)dtext->w > inlink->w) - dtext->x = inlink->w - dtext->w; - if ((unsigned)dtext->y + (unsigned)dtext->h > inlink->h) - dtext->y = inlink->h - dtext->h; + if (dtext->fix_bounds) { + if (dtext->x < 0) dtext->x = 0; + if (dtext->y < 0) dtext->y = 0; + if ((unsigned)dtext->x + (unsigned)dtext->w > inlink->w) + dtext->x = inlink->w - dtext->w; + if ((unsigned)dtext->y + (unsigned)dtext->h > inlink->h) + dtext->y = inlink->h - dtext->h; + } dtext->x &= ~((1 << dtext->hsub) - 1); dtext->y &= ~((1 << dtext->vsub) - 1); |
