Hi, Seeing as there have been some discussion on blitting modes here in the last few days, I'd like to bring up an issue I had which I never got to the bottom of.
I've got an issue with DrawGlyph in 1.2.6 when I'm blitting to a surface which is fully transparent. Though the destination alpha is zero, some of the destination color seeps in during the blit of the glyph. This is easiest seen where the background is fully transparent black, the font color is fully opaque white and the background layer is fully white. The result is white text on a white background but with a light grey dotted outline of text. The light grey is the result of the transparent black background being blended in to the foreground color. It may be that the destination alpha isn't being taken into account during the blit. I've tried merging some blending changes from 1.4.x but with no change in the net result. Is this a bug in the particular blend implementation being called, or expected behaviour based on the blitting flags being used (DSBLIT_BLEND_ALPHACHANNEL | DSBLIT_COLORIZE setup in fonts.c). Any suggestions about what might be the issue and how to proceed would be gratefully received. Hope I've been clear, Thanks! Dave. ........................................................................ Dave Craig Senior Software Engineer BrightSign _______________________________________________ directfb-users mailing list directfb-users@directfb.org http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-users
