Too much spacing in math mode between 'f' and 'l' (MkIV only) - ntg-context - NTG Mailing Lists

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Too much spacing in math mode between 'f' and 'l' (MkIV only)

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Re: [NTG-context] Proposed changes...

Vedran Miletić

3 May 2011 3 May '11

10:25 p.m.

Hi, please consider this: \starttext \math{flow_1} \stoptext When compiled with MkIV, space between "f" and "l" is quite big and doesn't look very good. Is it a bug? Regards, Vedran Miletić

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attachment.html (text/html — 360 bytes)
math-spacing-mkii.pdf (application/pdf — 33.3 KB)
math-spacing-mkiv.pdf (application/pdf — 9.3 KB)

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Aditya Mahajan

4 May 4 May

6:01 a.m.

New subject: Too much spacing in math mode between 'f' and 'l' (MkIV only)

On Tue, 3 May 2011, Vedran Miletić wrote:

Hi,

please consider this:

\starttext \math{flow_1} \stoptext

When compiled with MkIV, space between "f" and "l" is quite big and doesn't look very good. Is it a bug?

Definitely looks like a bug in italic correction. In principle, the spacing with virtual fonts (mkiv) should be the same as type 1 fonts (mkii). But I agree with Severin that you should not be using \math{flow_1} to represent the first flow. I hope that this example was for illustrating the spacing bug. Aditya

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Vedran Miletić

4:30 p.m.

New subject: Too much spacing in math mode between 'f' and 'l' (MkIV only)

2011/5/4 Aditya Mahajan

On Tue, 3 May 2011, Vedran Miletić wrote:

Hi,

...
please consider this:

\starttext \math{flow_1} \stoptext

When compiled with MkIV, space between "f" and "l" is quite big and doesn't look very good. Is it a bug?

Definitely looks like a bug in italic correction. In principle, the spacing with virtual fonts (mkiv) should be the same as type 1 fonts (mkii).

Thanks for clarification.

But I agree with Severin that you should not be using \math{flow_1} to represent the first flow. I hope that this example was for illustrating the spacing bug.

Do you suggest I follow Severin's solution? Regards, Vedran Miletić

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Vedran Miletić

6 May 6 May

6:30 p.m.

New subject: Too much spacing in math mode between 'f' and 'l' (MkIV only)

Dana 4. svibnja 2011. 16:30 Vedran Miletić je napisao/la:

2011/5/4 Aditya Mahajan

...
On Tue, 3 May 2011, Vedran Miletić wrote:

Hi,

...
please consider this:

\starttext \math{flow_1} \stoptext

When compiled with MkIV, space between "f" and "l" is quite big and doesn't look very good. Is it a bug?

Definitely looks like a bug in italic correction. In principle, the spacing with virtual fonts (mkiv) should be the same as type 1 fonts (mkii).

Thanks for clarification.

Just curious: is this ConTeXt or LuaTeX bug? Vedran Miletić

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Aditya Mahajan

10:57 p.m.

New subject: Too much spacing in math mode between 'f' and 'l' (MkIV only)

On Fri, 6 May 2011, Vedran Miletić wrote:

Dana 4. svibnja 2011. 16:30 Vedran Miletić je napisao/la:

...
2011/5/4 Aditya Mahajan

...
On Tue, 3 May 2011, Vedran Miletić wrote:

Hi,

...
please consider this:

\starttext \math{flow_1} \stoptext

When compiled with MkIV, space between "f" and "l" is quite big and doesn't look very good. Is it a bug?

Definitely looks like a bug in italic correction. In principle, the spacing with virtual fonts (mkiv) should be the same as type 1 fonts (mkii).

Thanks for clarification.

Just curious: is this ConTeXt or LuaTeX bug?

I am guessing that this is a context bug in creating a virtual font or loading a virtual font. But I don't know how to debug this. Hans and Taco, do you have any idea? Why is the inter-letter spacing different in MkII and MkIV. Aditya

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Hans Hagen

7 May 7 May

1:26 p.m.

New subject: Too much spacing in math mode between 'f' and 'l' (MkIV only)

On 6-5-2011 10:57, Aditya Mahajan wrote:

On Fri, 6 May 2011, Vedran Miletić wrote:

...
Dana 4. svibnja 2011. 16:30 Vedran Miletić je napisao/la:

...
2011/5/4 Aditya Mahajan

...
On Tue, 3 May 2011, Vedran Miletić wrote:

Hi,

...
please consider this:

\starttext \math{flow_1} \stoptext

When compiled with MkIV, space between "f" and "l" is quite big and doesn't look very good. Is it a bug?

Definitely looks like a bug in italic correction. In principle, the spacing with virtual fonts (mkiv) should be the same as type 1 fonts (mkii).

Thanks for clarification.

Just curious: is this ConTeXt or LuaTeX bug?

I am guessing that this is a context bug in creating a virtual font or loading a virtual font. But I don't know how to debug this.

Hans and Taco, do you have any idea? Why is the inter-letter spacing different in MkII and MkIV.

In math-vfu we have: if italic then width = width + italic end And that is for a reason. I might be a left over from when the math engine was redone. So I need input from Taco. Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------

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Taco Hoekwater

8 May 8 May

1:22 p.m.

New subject: Too much spacing in math mode between 'f' and 'l' (MkIV only)

On 05/07/2011 01:26 PM, Hans Hagen wrote:

...
Hans and Taco, do you have any idea? Why is the inter-letter spacing different in MkII and MkIV.

In math-vfu we have:

if italic then width = width + italic end

And that is for a reason. I might be a left over from when the math engine was redone. So I need input from Taco.

I suspect that was from an earlier, bad interpretation of the opentype math specification and that it can go away. But: much safer is to have a big test file first using various (variable|opname) + other char combinations. Best wishes, Taco

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Hans Hagen

7:34 p.m.

New subject: Too much spacing in math mode between 'f' and 'l' (MkIV only)

On 8-5-2011 1:22, Taco Hoekwater wrote:

On 05/07/2011 01:26 PM, Hans Hagen wrote:

...
...
Hans and Taco, do you have any idea? Why is the inter-letter spacing different in MkII and MkIV.

In math-vfu we have:

if italic then width = width + italic end

And that is for a reason. I might be a left over from when the math engine was redone. So I need input from Taco.

I suspect that was from an earlier, bad interpretation of the opentype math specification and that it can go away. But: much safer is to have a big test file first using various (variable|opname) + other char combinations.

ok, for now i'll just comment that code Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------

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participants (4)

Aditya Mahajan
Hans Hagen
Taco Hoekwater
Vedran Miletić