https://bugzilla.redhat.com/show_bug.cgi?id=825081

--- Comment #2 from Shriramana Sharma samjnaa@gmail.com --- UniView (http://rishida.net/scripts/uniview/) or BabelMap (http://www.babelstone.co.uk/software/babelmap.html) is your friend.

(I have also made small correction to the sample text.)

ಕ್ಷಾ ಕ್ಷಿ ಕ್ಷೀ ಕ್ಷು ಕ್ಷೂ ಕ್ಷೃ ಕ್ಷೄ ಕ್ಷೆ ಕ್ಷೇ ಕ್ಷೈ ಕ್ಷೊ ಕ್ಷೋ ಕ್ಷೌ ಕ್ಷ್ ಚ್ಚಾ ಚ್ಚಿ ಚ್ಚೀ ಚ್ಚು ಚ್ಚೂ ಚ್ಚೃ ಚ್ಚೄ ಚ್ಚೆ ಚ್ಚೇ ಚ್ಚೈ ಚ್ಚೊ ಚ್ಚೋ ಚ್ಚೌ ಚ್ಚ್ ಡ್ಬಾ ಡ್ಬಿ ಡ್ಬೀ ಡ್ಬು ಡ್ಬೂ ಡ್ಬೃ ಡ್ಬೄ ಡ್ಬೆ ಡ್ಬೇ ಡ್ಬೈ ಡ್ಬೊ ಡ್ಬೋ ಡ್ಬೌ ಡ್ಬ್

\u0C95\u0CCD\u0CB7\u0CBE \u0C95\u0CCD\u0CB7\u0CBF \u0C95\u0CCD\u0CB7\u0CC0 \u0C95\u0CCD\u0CB7\u0CC1 \u0C95\u0CCD\u0CB7\u0CC2 \u0C95\u0CCD\u0CB7\u0CC3 \u0C95\u0CCD\u0CB7\u0CC4 \u0C95\u0CCD\u0CB7\u0CC6 \u0C95\u0CCD\u0CB7\u0CC7 \u0C95\u0CCD\u0CB7\u0CC8 \u0C95\u0CCD\u0CB7\u0CCA \u0C95\u0CCD\u0CB7\u0CCB \u0C95\u0CCD\u0CB7\u0CCC \u0C95\u0CCD\u0CB7\u0CCD

\u0C9A\u0CCD\u0C9A\u0CBE \u0C9A\u0CCD\u0C9A\u0CBF \u0C9A\u0CCD\u0C9A\u0CC0 \u0C9A\u0CCD\u0C9A\u0CC1 \u0C9A\u0CCD\u0C9A\u0CC2 \u0C9A\u0CCD\u0C9A\u0CC3 \u0C9A\u0CCD\u0C9A\u0CC4 \u0C9A\u0CCD\u0C9A\u0CC6 \u0C9A\u0CCD\u0C9A\u0CC7 \u0C9A\u0CCD\u0C9A\u0CC8 \u0C9A\u0CCD\u0C9A\u0CCA \u0C9A\u0CCD\u0C9A\u0CCB \u0C9A\u0CCD\u0C9A\u0CCC \u0C9A\u0CCD\u0C9A\u0CCD

\u0CA1\u0CCD\u0CAC\u0CBE \u0CA1\u0CCD\u0CAC\u0CBF \u0CA1\u0CCD\u0CAC\u0CC0 \u0CA1\u0CCD\u0CAC\u0CC1 \u0CA1\u0CCD\u0CAC\u0CC2 \u0CA1\u0CCD\u0CAC\u0CC3 \u0CA1\u0CCD\u0CAC\u0CC4 \u0CA1\u0CCD\u0CAC\u0CC6 \u0CA1\u0CCD\u0CAC\u0CC7 \u0CA1\u0CCD\u0CAC\u0CC8 \u0CA1\u0CCD\u0CAC\u0CCA \u0CA1\u0CCD\u0CAC\u0CCB \u0CA1\u0CCD\u0CAC\u0CCC \u0CA1\u0CCD\u0CAC\u0CCD

BTW what will you do with the codepoints?

https://bugzilla.redhat.com/show_bug.cgi?id=825081

--- Comment #4 from Shriramana Sharma samjnaa@gmail.com --- (In reply to comment #3)

Just tried for ಕ್ಷೃ

I *told* you it works for ಕ್ಷೃ because for ಕ್ಷೃ ಜ್ಞ and two other consonant clusters you have included separate glyphs with all vowel sign combinations in the font. The point was for combinations *other* than these which can very well occur when writing especially Sanskrit-based words in Kannada script.

But even with ಕ್ಷೃ the rendering is not consistent in Linux. See for ಕ್ಷು ಕ್ಷೂ the SSA-vattu is pushed to the right, whereas it is right below the KA in other vowels due to the existence of pre-composed glyphs with vowel sign. And for ಕ್ಷೌ it is also pushed to the right despite the existence of the precomposed-glyph.

(Maybe your rendering in Pango/Fedora is different from what I am seeing in LibreOffice/Kubuntu -- please post a PDF.)

it works fine in Gnome with pango. Please test it and let me know if its work on Windows.

LOL I'm not only using it on Windows but also on my Kubuntu Linux installation.

On LibreOffice 3.5 on Kubuntu 12.04, the sequences still do NOT render properly. The PDF I had given you was produced by LibreOffice on Linux only and not from Windows.

So i can fix other combination in same way.

Let me just list the required rendering so you can take care of how it is to be achieved:

Nasically you have four consonant clusters with precomposed glyphs i.e. K.SSA, J.NYA, D.DA and L.LA. Of these, except for vowel signs U, UU and vocalic R, RR, L, LL, combinations with all other vowel signs are precomposed.

1) In the case of these precomposed glyphs:

1a) If VS = vowel sign of U/UU or one of the vocalic vowels,

C1 + VIR + C2 + VS --> C1_WITH_C2_VATTU VS

1b) If VS is another vowel sign or the virama

C1 + VIR + C2 + VS --> C1_WITH_C2_VATTU_WITH_VS

2) In the case of the consonant clusters *without* precomposed glyphs

2a) If VS = vowel sign of U/UU or one of the vocalic vowels,

C1 + VIR + C2 + VS --> C1 VS C2_VATTU

2b) If VS is another vowel sign or the virama

C1 + VIR + C2 + VS --> C1_WITH_VS C2_VATTU

Product: Fedora https://bugzilla.redhat.com/show_bug.cgi?id=825081

Pravin Satpute psatpute@redhat.com changed:

What |Removed |Added ---------------------------------------------------------------------------- Flags| |needinfo?(samjnaa@gmail.com | |)

--- Comment #6 from Pravin Satpute psatpute@redhat.com --- I have fixed the first row and committed in upstream. ಕ್ಷಾ ಕ್ಷಿ ಕ್ಷೀ ಕ್ಷು ಕ್ಷೂ ಕ್ಷೃ ಕ್ಷೄ ಕ್ಷೆ ಕ್ಷೇ ಕ್ಷೈ ಕ್ಷೊ ಕ್ಷೋ ಕ್ಷೌ ಕ್ಷ್

Tunga also renders same way like lohit for below test cases. What is ideal rendering should below base part sit exactly below the base consonant?

2. ಚ್ಚಾ ಚ್ಚಿ ಚ್ಚೀ ಚ್ಚೃ ಚ್ಚೄ ಚ್ಚು ಚ್ಚೂ ಚ್ಚೆ ಚ್ಚೇ ಚ್ಚೈ ಚ್ಚೊ ಚ್ಚೋ ಚ್ಚ್ 3. ಡ್ಡಾ ಡ್ಡಿ ಡ್ಡೀ ಡ್ಡು ಡ್ಡೂ ಡ್ಡೃ ಡ್ಡೆ ಡ್ಡೇ ಡ್ಡೈ ಡ್ಡೊ ಡ್ಡೋ ಡ್ಡೌ ಡ್ಡ್ ---

Product: Fedora https://bugzilla.redhat.com/show_bug.cgi?id=825081

--- Comment #8 from Shriramana Sharma samjnaa@gmail.com --- Sorry for extra post:

As clarification to point 3 in my previous comment:

In Linux,

1) In the case of the four clusters with separate conjunct glyphs in the font i.e. K.SSA, J.NYA, D.DA and L.LA, AI and Virama are attaching properly (without overlap) but vocalic R/RR are still overlapping with the below-base consonant.

2) In the case of all other clusters, AI and virama are also not attaching properly.

On Windows XP (sorry I am not able to test on Windows 7):

None of the clusters have AI and virama or vocalic R/RR attaching properly.

Product: Fedora https://bugzilla.redhat.com/show_bug.cgi?id=825081

--- Comment #10 from Pravin Satpute psatpute@redhat.com --- Created attachment 674575 --> https://bugzilla.redhat.com/attachment.cgi?id=674575&action=edit Lohit Kannada on W8

Product: Fedora https://bugzilla.redhat.com/show_bug.cgi?id=825081

--- Comment #12 from Pravin Satpute psatpute@redhat.com --- ಚ್ಚ್ & ಡ್ಡ್ works fine in Windows but not on Harfbuzz, reported bug for https://bugs.freedesktop.org/show_bug.cgi?id=59118 lets see if we can get same rendering with Harfbuzz as well.

Product: Fedora https://bugzilla.redhat.com/show_bug.cgi?id=825081

--- Comment #14 from Shriramana Sharma samjnaa@gmail.com --- Created attachment 675746 --> https://bugzilla.redhat.com/attachment.cgi?id=675746&action=edit Script to produce mostly valid test examples

Hello Pravin and Behdad and thanks for the quick work. I now am attaching a small Python3 script to produce any required number of test cases which are phonologically valid (and to a great extent can really occur) for Indic languages, esp. Sanskrit. You can use it to produce more test cases if you want.

@Pravin: Even now the vowel sign for vocalic R/RR is slightly overlapping in case of K.SSA. Can you do a contextual kerning of the vowel sign when the below-base consonant will collide with it?

Product: Fedora https://bugzilla.redhat.com/show_bug.cgi?id=825081

Shriramana Sharma samjnaa@gmail.com changed:

What |Removed |Added ---------------------------------------------------------------------------- Attachment #673323|0 |1 is obsolete| |

--- Comment #16 from Shriramana Sharma samjnaa@gmail.com --- Created attachment 679704 --> https://bugzilla.redhat.com/attachment.cgi?id=679704&action=edit ODT and PDF of random 2-consonant clusters

Hi Pravin -- every time you run the script it will produce new examples. And right now I have tested on my Windows XP LibO 3.6.4 and Kubuntu Precise LibO 3.5.4 and still many clusters are not rendering correctly. I have colour-coded them in the attached doc. Is it that in HB trunk they are rendering correctly?

Product: Fedora https://bugzilla.redhat.com/show_bug.cgi?id=825081

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