diff options
Diffstat (limited to 'libavfilter/parseutils.h')
| -rw-r--r-- | libavfilter/parseutils.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/libavfilter/parseutils.h b/libavfilter/parseutils.h index 8ad7b8b5e6..f699e9d34a 100644 --- a/libavfilter/parseutils.h +++ b/libavfilter/parseutils.h @@ -46,7 +46,15 @@ char *av_get_token(const char **buf, const char *term); * Puts the RGBA values that correspond to color_string in rgba_color. * * @param color_string a string specifying a color. It can be the name of - * a color (case insensitive match) or a 0xRRGGBB[AA] sequence. + * a color (case insensitive match) or a 0xRRGGBB[AA] sequence, + * possibly followed by "@" and a string representing the alpha + * component. + * The alpha component may be a string composed by "0x" followed by an + * hexadecimal number or a base-10 number between 0 and 255, or a + * decimal number between 0.0 and 1.0, which represents the opacity + * value (0/0x00/0.0 means completely transparent, 255/0xff/1.0 + * completely opaque). + * If the alpha component is not specified then 255 is assumed. * The string "random" will result in a random color. * @return >= 0 in case of success, a negative value in case of * failure (for example if color_string cannot be parsed). |