Michal,
Yes, I read an existing PDF file and no, I don't want to draw. I just need
to know the exact position of each character on the page. In a general
manner, when you parse a PDF document and need such information, you will
assign the font char space to the current font in order to get the right
computation.
Christophe
Le mar. 11 mai 2021 à 18:03, Michal Sudolsky <sudols...@gmail.com> a écrit :
>
>
> On Tue, May 11, 2021 at 5:49 PM Christophe <xto...@gmail.com> wrote:
>
>> Michal,
>>
>> It means we can't directly call function *SetFontCharSpace* with Tc ? We
>> have to make a computation based on font size in our applicative code. In
>> this case, could you please elaborate and provide us the right
>> transformation from Tc to FontCharSpace ?
>>
>>
> This is how it was done seems. Why would you do that? You are parsing some
> existing content stream and then drawing it again?
>
>
>> Thank you
>>
>> Christophe
>>
>>
>> Le mar. 11 mai 2021 à 16:23, Michal Sudolsky <sudols...@gmail.com> a
>> écrit :
>>
>>> Hi,
>>>
>>> On Tue, May 11, 2021 at 9:15 AM Christophe <xto...@gmail.com> wrote:
>>>
>>>> Hello Michal,
>>>>
>>>> My remark was relative to class PdfFontMetricsFreetype, not
>>>> PdfFontMetricsObject.
>>>>
>>>>
>>> Yes, I meant that implementation in PdfFontMetricsFreetype (and also
>>> PdfFontMetricsBase14) is correct but the problem is
>>> with PdfFontMetricsObject.
>>>
>>> But, in your patch, you also divide font char space by 100, twice:
>>>>
>>>> return (dWidth * m_matrix.front().GetReal() + this->GetFontCharSpace()
>>>> / 100.0) * this->GetFontSize() * this->GetFontScale() / 100.0;
>>>>
>>>>
>>> This is same as what is used in PdfFontMetricsFreetype
>>> and PdfFontMetricsBase14 (I just simplified the formula):
>>>
>>> *return* dWidth * *static_cast*<*double*>(*this*->GetFontSize() *
>>> *this*->GetFontScale() / 100.0) / 1000.0 +
>>>
>>> *static_cast*<*double*>( *this*->GetFontSize() * *this*->
>>> GetFontScale() / 100.0 * *this*->GetFontCharSpace() / 100.0);
>>>
>>>
>>>> Are you sure of that ?
>>>>
>>>> In PDF format, the font char space (Tc) is given in PDF units, not in
>>>> percent. Does it mean, we have to transform this Tc value into percent
>>>> before affecting the m_fFontCharSpace variable ? If yes, how shall we
>>>> do that ?
>>>>
>>>>
>>> Both font scale and font char space are in percent in podofo. Font char
>>> space is not directly passed as Tc. Font scale is in percent also in pdf.
>>>
>>> m_oss << m_pFont->GetFontCharSpace() * m_pFont->GetFontSize() /
>>> 100.0 << " Tc" << std::endl;
>>>
>>>
>>> Thank you for your help
>>>>
>>>> Christophe
>>>>
>>>>
>>>> Le lun. 10 mai 2021 à 20:54, Michal Sudolsky <sudols...@gmail.com> a
>>>> écrit :
>>>>
>>>>>
>>>>>
>>>>> On Mon, May 10, 2021 at 12:23 PM Christophe <xto...@gmail.com> wrote:
>>>>>
>>>>>> Hello all,
>>>>>>
>>>>>> I have a doubt relative to this method definition:
>>>>>>
>>>>>> double PdfFontMetricsFreetype::CharWidth( unsigned char c ) const
>>>>>> {
>>>>>> double dWidth = m_vecWidth[static_cast<unsigned int>(c)];
>>>>>>
>>>>>> return dWidth * static_cast<double>(this->GetFontSize() * this
>>>>>> ->GetFontScale() / 100.0) / 1000.0 +
>>>>>> static_cast<double>( this->GetFontSize() * this
>>>>>> ->GetFontScale() / 100.0 * this->GetFontCharSpace() / 100.0);
>>>>>> }
>>>>>>
>>>>>> The Char Space is divided by 100.0 and I think it is an error as it
>>>>>> is not the case for PdfFontMetricsObject::CharWidth, nor for
>>>>>> PdfFontMetricsObject::CharWidth.
>>>>>>
>>>>>>
>>>>> It is intended to be divided by 100. See comment above that function:
>>>>>
>>>>> /** Set the character spacing of this metrics object
>>>>>
>>>>> * *\param *fCharSpace character spacing in percent
>>>>>
>>>>> */
>>>>>
>>>>> *inline* *void* SetFontCharSpace( *float* fCharSpace );
>>>>>
>>>>>
>>>>>> What do you think ?
>>>>>>
>>>>>> Thank you
>>>>>>
>>>>>> Christophe
>>>>>> _______________________________________________
>>>>>> Podofo-users mailing list
>>>>>> Podofo-users@lists.sourceforge.net
>>>>>> https://lists.sourceforge.net/lists/listinfo/podofo-users
>>>>>>
>>>>>
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