[OpenJDK 2D-Dev] Strange text rendering with SRC + Extra Alpha

[Clemens Eisserer]

Hi,

While playing arround with the SRC composition rule I found what seems
to be a bug.
When rendering text with an AlphaComposite(SRC, EA) I get garbage when
enabling subpixel antialising:

      g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC, 0.01f));
      g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_VBGR);
      g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);

      g2d.setColor(Color.black);
      g2d.drawString("This text is painted with black color", 50, 50);

If I comment out the KEY_ANTIALIASING hint, which shouldn't have any
effect on text rendering, extra alpha is ignored but the text is
rendered correctly.

Should I file a but?

Thanks, Clemens