[FFmpeg-devel] [PATCH v2] avfilter:vf_drawtext: add new line space size set parameter

[Steven Liu]

2017-01-18 6:24 GMT+08:00 Steven Liu <lq at chinaffmpeg.org>:

> add line_spacing parameter to set the space between two lines
>
> Based on an idea by: Leandro Santiago <leandrosansilva at gmail.com>
> Reviewed-by: Michael Niedermayer <michael at niedermayer.cc>
> Signed-off-by: Steven Liu <lq at chinaffmpeg.org>
> ---
>  doc/filters.texi          | 4 ++++
>  libavfilter/vf_drawtext.c | 4 +++-
>  2 files changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/doc/filters.texi b/doc/filters.texi
> index 94548b1..a0c2980 100644
> --- a/doc/filters.texi
> +++ b/doc/filters.texi
> @@ -6750,6 +6750,10 @@ option, check the "Color" section in the
> ffmpeg-utils manual.
>
>  The default value of @var{boxcolor} is "white".
>
> + at item line_spacing
> +Set the line spacing in pixels of the border to be drawn around the box
> using @var{box}.
> +The default value of @var{line_spacing} is 0.
> +
>  @item borderw
>  Set the width of the border to be drawn around the text using
> @var{bordercolor}.
>  The default value of @var{borderw} is 0.
> diff --git a/libavfilter/vf_drawtext.c b/libavfilter/vf_drawtext.c
> index 649240b..d8f7730 100644
> --- a/libavfilter/vf_drawtext.c
> +++ b/libavfilter/vf_drawtext.c
> @@ -158,6 +158,7 @@ typedef struct DrawTextContext {
>      int borderw;                    ///< border width
>      unsigned int fontsize;          ///< font size to use
>
> +    int line_spacing;               ///< lines spacing in pixels
>      short int draw_box;             ///< draw box around text - true or
> false
>      int boxborderw;                 ///< box border width
>      int use_kerning;                ///< font kerning is used - true/false
> @@ -209,6 +210,7 @@ static const AVOption drawtext_options[]= {
>      {"shadowcolor", "set shadow color",     OFFSET(shadowcolor.rgba),
>  AV_OPT_TYPE_COLOR,  {.str="black"}, CHAR_MIN, CHAR_MAX, FLAGS},
>      {"box",         "set box",              OFFSET(draw_box),
>  AV_OPT_TYPE_BOOL,   {.i64=0},     0,        1       , FLAGS},
>      {"boxborderw",  "set box border width", OFFSET(boxborderw),
>  AV_OPT_TYPE_INT,    {.i64=0},     INT_MIN,  INT_MAX , FLAGS},
> +    {"line_spacing",  "set line spacing in pixels",
> OFFSET(line_spacing),   AV_OPT_TYPE_INT,    {.i64=0},     INT_MIN,
> INT_MAX,FLAGS},
>      {"fontsize",    "set font size",        OFFSET(fontsize),
>  AV_OPT_TYPE_INT,    {.i64=0},     0,        INT_MAX , FLAGS},
>      {"x",           "set x expression",     OFFSET(x_expr),
>  AV_OPT_TYPE_STRING, {.str="0"},   CHAR_MIN, CHAR_MAX, FLAGS},
>      {"y",           "set y expression",     OFFSET(y_expr),
>  AV_OPT_TYPE_STRING, {.str="0"},   CHAR_MIN, CHAR_MAX, FLAGS},
> @@ -1250,7 +1252,7 @@ static int draw_text(AVFilterContext *ctx, AVFrame
> *frame,
>          if (is_newline(code)) {
>
>              max_text_line_w = FFMAX(max_text_line_w, x);
> -            y += s->max_glyph_h;
> +            y += s->max_glyph_h + s->line_spacing;
>              x = 0;
>              continue;
>          }
> --
> 2.10.1.382.ga23ca1b.dirty
>
>
>
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>


pushed!



Thanks