[Swftools-common] pdf2swf: text flips with "-T 9" argument

[Justin . Liebeskind]

Hello Swftools,

I am not sure if this is the right place
to ask about bugs, but I could not find any other.
Please direct me to the correct place
if there is one...

Anyways, I have an issue with pdf2swf
where text gets flipped in the outputted SWF.
This happens in all SWF viewers and
it happens with almost all of my generated SWF files.
It is reproducible by simply shrinking
the viewing window -- at a certain point, the text will suddenly flip.

Upon further investigation, it seemed
to be related to using the "-T 9" argument of pdf2swf.
Without this argument, the problem goes
away.
However, I need to use this argument...

I diffed two swfdumps - one using "-T
9" and one not using it.
The issue seems to be with the CSMTextSettings
property.
See page 208 of the SWF Spec:
www.adobe.com/devnet/swf/pdf/swf_file_format_spec_v9.pdf


The GridFit field is being set to 1
by pdf2swf, but this is only supported with left-aligned dynamic text.
pdf2swf seems to violate this spec.
If I manually fix the SWF to have this
field set to 0, then my problem goes away.

After grabbing the source for swftools,
it looks like there are two places where this problem occurs:
swftools-0.9.0/lib/devices/swf.c, line
768
and
swftools-0.9.0/src/swf.c, line 1359

Example:
 if(stack[0].swf->fileVersion
>= 8) {
        tag
= swf_InsertTag(tag, ST_CSMTEXTSETTINGS);
        swf_SetU16(tag,
id);
        //swf_SetU8(tag,
/*grid*/(1<<3)|/*flashtype*/0x40);  //old
        swf_SetU8(tag,
/*grid*/(0)|/*flashtype*/0x40);  //new. grid fitting only supported
for left-aligned dynamic text.
        swf_SetU32(tag,
0);//thickness
        swf_SetU32(tag,
0);//sharpness
        swf_SetU8(tag,
0);//reserved
    }


This is my first time looking at the
source code, so I am afraid that I will screw it up if I try to fix this
issue myself.
A developer more familiar with the code
base would probably know more about what is going on with this setting.

Please help!

Thank you,
-Justin Liebeskind
address@hidden