[BATIK-1268] Does not render Indic text correctly

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.11, 1.14
• Component/s: SVG Rasterizer
• Environment: Ubuntu 18.04.3
• Assignee: Unassigned
• Reporter: Ananth Pattabiraman
• Created: 02/Oct/19 12:54
• Updated: 06/Feb/22 19:29

Description

Batik does not render unicode text of Indian languages correctly. I can demonstrate the problem with Rasterizer, but the problem may be present with other modules as well.

Here is a simple svg file with Tamil text (attachment: test-tamil-rendering.svg) rendered to png by Batik and Inkscape for comparison.

java -jar batik-slideshow-1.11.jar test-tamil-rendering.svg

generated test-tamil-rendering.png. The text rendering here is faulty. Compound form letters  are either detached (second letter மி), or wrong symbol attached and incompletely transformed (ழு, து). Positioning of dots above letters are off.

For comparison, see test-tamil-rendering.inkscape.png for correct rendering. This file was generated by inkscape.

inkscape --export-area-page --without-gui --export-png=test-tamil-rendering.inkscape.png test-tamil-rendering.svg

Also note that changing font (to Tamil specific font) did not improve/fix rendering.