RFR: 8240756: [macos] SwingSet2:TableDemo:Printed Japanese characters were garbled

Tue Nov 2 00:30:13 UTC 2021

On Fri, 23 Apr 2021 06:49:10 GMT, Sergey Bylokhov <serb at openjdk.org> wrote:

>> Hi,
>> 
>> Could you review the fix?
>> When non-English characters were printed from JTable on MacOS, CTextPipe.doDrawGlyphs was called by OSXSurfaceData.drawGlyphs. However, CTextPipe seems not support glyph with slot number of composite fonts.
>> 
>> The slot data mask of GlyphVector is 0xff000000. In my environment, Japanese font was loaded at slot 4, and glyph data is like [0x40003e5]. Then, unexpected glyph was drawn.
>
> As far as I understand it is not directly related to the JTable and the bug is reproduced if some specific font is used when any text is printed? Did you check why the CTextPipe does not support it directly? It looks like the JavaCT_DrawGlyphVector uses pure core graphics, which I think should support this font?

@mrserb @prrace 
Could you review the latest patch, please? I believe it's more reasonable than previous proposals.

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PR: https://git.openjdk.java.net/jdk/pull/3619