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Athens Font Rendering Bug

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jrick

Athens Font Rendering Bug

Perhaps other people have already reported this for Bloc but something is wrong with the font rendering of Athens. Here's the code and how it is rendered in Athens vs how it is rendered in BitBlt. It seems like Athens adds more space between letters than is supposed to be there.

tMorph := TextMorph new.

font1 := TextFontReference toFont: (LogicalFont familyName: 'Arial' fallbackFamilyNames: nil pointSize: 28 stretchValue: 5 weightValue: 400 slantValue: 0).

font2 := (TextFontReference toFont: (StrikeFont familyName: 'Atlanta' size: 11)).

t1 := 'this is font1' asText addAttribute: font1.

t2 := ' and this is font2' asText addAttribute: font2.

tMorph contents: (t1,t2).

Cheers,

Jeff

AthensRenderingOfFonts.png (3K) Download Attachment

NormalRenderingOfFonts.png (2K) Download Attachment

Aliaksei Syrel

Re: Athens Font Rendering Bug

Actually it is not Athens bug. Problem is in string extent measurement done by text morph. Athens (Cairo in the end) only renders string glyphs created by FreeType2 on positions specified by someone else (morphic in this case).

Cheers
Alex

On Jul 10, 2016 6:16 PM, "J.F. Rick" <[hidden email]> wrote:

Perhaps other people have already reported this for Bloc but something is wrong with the font rendering of Athens. Here's the code and how it is rendered in Athens vs how it is rendered in BitBlt. It seems like Athens adds more space between letters than is supposed to be there.

tMorph := TextMorph new.
font1 := TextFontReference toFont: (LogicalFont familyName: 'Arial' fallbackFamilyNames: nil pointSize: 28 stretchValue: 5 weightValue: 400 slantValue: 0).
font2 := (TextFontReference toFont: (StrikeFont familyName: 'Atlanta' size: 11)).
t1 := 'this is font1' asText addAttribute: font1.
t2 := ' and this is font2' asText addAttribute: font2.
tMorph contents: (t1,t2).

Cheers,

Jeff

jrick

Re: Athens Font Rendering Bug

Interesting. Why is it then correct in BitBlt rendering and not correct in Athens rendering? Does this mean it can be fixed at the Smalltalk level? If so, give me a hint of where to look and I'll see if I can find a solution.

Cheers,

Jeff

On Sun, Jul 10, 2016 at 1:12 PM Aliaksei Syrel <[hidden email]> wrote:

Hi

Actually it is not Athens bug. Problem is in string extent measurement done by text morph. Athens (Cairo in the end) only renders string glyphs created by FreeType2 on positions specified by someone else (morphic in this case).

Cheers
Alex

On Jul 10, 2016 6:16 PM, "J.F. Rick" <[hidden email]> wrote:
Perhaps other people have already reported this for Bloc but something is wrong with the font rendering of Athens. Here's the code and how it is rendered in Athens vs how it is rendered in BitBlt. It seems like Athens adds more space between letters than is supposed to be there.

tMorph := TextMorph new.
font1 := TextFontReference toFont: (LogicalFont familyName: 'Arial' fallbackFamilyNames: nil pointSize: 28 stretchValue: 5 weightValue: 400 slantValue: 0).
font2 := (TextFontReference toFont: (StrikeFont familyName: 'Atlanta' size: 11)).
t1 := 'this is font1' asText addAttribute: font1.
t2 := ' and this is font2' asText addAttribute: font2.
tMorph contents: (t1,t2).

Cheers,

Jeff

HilaireFernandes

Re: Athens Font Rendering Bug

In reply to this post by Aliaksei Syrel

Not sure it is related, but I found bug in Dr. Geo when rendering
string, the whole text extent does not seem right and glitches appear,

See the picture attached to this bug report:
https://bugs.launchpad.net/drgeo/+bug/1372933

Hilaire

Le 10/07/2016 19:10, Aliaksei Syrel a écrit :

> Hi
>
> Actually it is not Athens bug. Problem is in string extent measurement
> done by text morph. Athens (Cairo in the end) only renders string glyphs
> created by FreeType2 on positions specified by someone else (morphic in
> this case).
>
> Cheers
> Alex
>

--
Dr. Geo
http://drgeo.eu

http://drgeo.eu

Henrik Nergaard

Re: Athens Font Rendering Bug

On Windows?

Try:
-----
CairoGlyph class removeSelector:#byteAlignment.
CairoGlyph rebuildFieldAccessors .
----

Best regards,
Henrik

-----Original Message-----
From: Pharo-dev [mailto:[hidden email]] On Behalf Of Hilaire
Sent: Tuesday, July 12, 2016 11:00 AM
To: [hidden email]
Subject: Re: [Pharo-dev] Athens Font Rendering Bug

Not sure it is related, but I found bug in Dr. Geo when rendering string, the whole text extent does not seem right and glitches appear,

See the picture attached to this bug report:
https://bugs.launchpad.net/drgeo/+bug/1372933

Hilaire

Le 10/07/2016 19:10, Aliaksei Syrel a écrit :

> Hi
>
> Actually it is not Athens bug. Problem is in string extent measurement
> done by text morph. Athens (Cairo in the end) only renders string
> glyphs created by FreeType2 on positions specified by someone else
> (morphic in this case).
>
> Cheers
> Alex
>

--
Dr. Geo
http://drgeo.eu

jrick

Re: Athens Font Rendering Bug

In reply to this post by jrick

It seems that emphasis is also not respected in Athens. If I try the following, it works in BitBlt, but both are rendered as plain inside Athens.

| font boldFont |

font := StrikeFont familyName: 'Arial' pointSize: 18.

boldFont := StrikeFont familyName: 'Arial' pointSize: 18 emphasized: TextEmphasis bold emphasisCode.

TextMorph new

contents: (Text initialFont: font stringOrText: 'test'), (Text initialFont: boldFont stringOrText: 'this');

openInHand

Nicolai Hess-3-2

Re: Athens Font Rendering Bug

Do not use StrikeFont with athens

Am 20.07.2016 7:49 nachm. schrieb "J.F. Rick" <[hidden email]>:

It seems that emphasis is also not respected in Athens. If I try the following, it works in BitBlt, but both are rendered as plain inside Athens.

| font boldFont |
font := StrikeFont familyName: 'Arial' pointSize: 18.
boldFont := StrikeFont familyName: 'Arial' pointSize: 18 emphasized: TextEmphasis bold emphasisCode.
TextMorph new
contents: (Text initialFont: font stringOrText: 'test'), (Text initialFont: boldFont stringOrText: 'this');
openInHand

jrick

Re: Athens Font Rendering Bug

Cool. What should I use? Is this useful: http://www.tudorgirba.com/blog/free-font-collection-for-pharo

On Wed, Jul 20, 2016 at 2:16 PM Nicolai Hess <[hidden email]> wrote:

Do not use StrikeFont with athens

Am 20.07.2016 7:49 nachm. schrieb "J.F. Rick" <[hidden email]>:
It seems that emphasis is also not respected in Athens. If I try the following, it works in BitBlt, but both are rendered as plain inside Athens.

| font boldFont |
font := StrikeFont familyName: 'Arial' pointSize: 18.
boldFont := StrikeFont familyName: 'Arial' pointSize: 18 emphasized: TextEmphasis bold emphasisCode.
TextMorph new
contents: (Text initialFont: font stringOrText: 'test'), (Text initialFont: boldFont stringOrText: 'this');
openInHand

Nicolai Hess-3-2

Re: Athens Font Rendering Bug

2016-07-20 20:46 GMT+02:00 J.F. Rick <[hidden email]>:

Cool. What should I use? Is this useful: http://www.tudorgirba.com/blog/free-font-collection-for-pharo

Any FreeType font, the builtin (Source Sans Pro/ Source Code Pro) or a font from your system (after loading all available fonts).

| font boldFont italicFont |
font := LogicalFont familyName: 'Source Sans Pro' pointSize: 18.
boldFont := (LogicalFont familyName: 'Arial' pointSize: 18) emphasized: TextEmphasis bold emphasisCode.
italicFont := (LogicalFont familyName: 'Times New Roman' pointSize: 18) emphasized: TextEmphasis italic emphasisCode.
TextMorph new
contents: (Text initialFont: font stringOrText: 'normal'), (Text initialFont: boldFont stringOrText: 'bold'), (Text initialFont: italicFont stringOrText: 'italic');
openInSceneView

On Wed, Jul 20, 2016 at 2:16 PM Nicolai Hess <[hidden email]> wrote:
Do not use StrikeFont with athens

Am 20.07.2016 7:49 nachm. schrieb "J.F. Rick" <[hidden email]>:
It seems that emphasis is also not respected in Athens. If I try the following, it works in BitBlt, but both are rendered as plain inside Athens.

| font boldFont |
font := StrikeFont familyName: 'Arial' pointSize: 18.
boldFont := StrikeFont familyName: 'Arial' pointSize: 18 emphasized: TextEmphasis bold emphasisCode.
TextMorph new
contents: (Text initialFont: font stringOrText: 'test'), (Text initialFont: boldFont stringOrText: 'this');
openInHand

jrick

Re: Athens Font Rendering Bug

Thanks. It is working nicely.

On Wed, Jul 20, 2016 at 3:32 PM Nicolai Hess <[hidden email]> wrote:

2016-07-20 20:46 GMT+02:00 J.F. Rick <[hidden email]>:
Cool. What should I use? Is this useful: http://www.tudorgirba.com/blog/free-font-collection-for-pharo

Any FreeType font, the builtin (Source Sans Pro/ Source Code Pro) or a font from your system (after loading all available fonts).

| font boldFont italicFont |
font := LogicalFont familyName: 'Source Sans Pro' pointSize: 18.
boldFont := (LogicalFont familyName: 'Arial' pointSize: 18) emphasized: TextEmphasis bold emphasisCode.
italicFont := (LogicalFont familyName: 'Times New Roman' pointSize: 18) emphasized: TextEmphasis italic emphasisCode.
TextMorph new
contents: (Text initialFont: font stringOrText: 'normal'), (Text initialFont: boldFont stringOrText: 'bold'), (Text initialFont: italicFont stringOrText: 'italic');
openInSceneView

On Wed, Jul 20, 2016 at 2:16 PM Nicolai Hess <[hidden email]> wrote:
Do not use StrikeFont with athens

Am 20.07.2016 7:49 nachm. schrieb "J.F. Rick" <[hidden email]>:
It seems that emphasis is also not respected in Athens. If I try the following, it works in BitBlt, but both are rendered as plain inside Athens.

| font boldFont |
font := StrikeFont familyName: 'Arial' pointSize: 18.
boldFont := StrikeFont familyName: 'Arial' pointSize: 18 emphasized: TextEmphasis bold emphasisCode.
TextMorph new
contents: (Text initialFont: font stringOrText: 'test'), (Text initialFont: boldFont stringOrText: 'this');
openInHand