This provides broader details for luma and chroma (0-255 instead of 16-235 and respectively 1-255 instead of 16-240)

and use limits to render underline/strikethrough correctly

Line height is always set to max of the rendered glyphs height.
This causes 'dancing' lines because row height it never the
same, amplified by number of preceding empty rows.

or try #3 in fact :/
This reverts commit 0b6165af.
This reverts commit 24a59363.

Don't end the NAL unit when we reach 0x000000. Refactor since we don't need to
parse separately the start and the end of the NAL unit anymore.

Can't behave well if renderers add their own arbitrary margins
and we have a rows/cols based sub

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

strdup() is as (un)likely to fail as asprintf().

Pointed-out-by: <hugh1234@mail.ustc.edu.cn>

Also use size_t for the size.

In the previous implementation was so unsafe that the ARC
compiler was not able work properly and printed a warning.

While there was no real problem here, switch to blocks to
silence the compiler and see potential errors earlier.

removes temporary text_style_Reset() and finishes
migrating decoders.

We might want to deprecate text_style_New().

use or don't use filter. -1 has no better
meaning than 0 and 0 is for new text-style