Messages in this thread Patch in this message | | | Date | Sun, 15 Jun 2003 21:10:32 +0200 | From | Geert Uytterhoeven <> | Subject | [PATCH] fb_cmap and transparency |
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If a colormap contains no transparency information, fb_set_cmap() calls fb_setcolreg() with trans = 0. This causes all CLUT entries to be fully transparent on hardware that does have transparency information in the CLUT registers.
The following patch solves this problem by changing the default transparency from 0 (full transparent) to 0xffff (full opaque).
--- linux-2.4.x/drivers/video/fbcmap.c.orig Mon Mar 5 09:29:30 2001 +++ linux-2.4.x/drivers/video/fbcmap.c Mon Mar 17 17:39:59 2003 @@ -271,7 +271,7 @@ hred = *red; hgreen = *green; hblue = *blue; - htransp = transp ? *transp : 0; + htransp = transp ? *transp : 0xffff; } else { get_user(hred, red); get_user(hgreen, green); @@ -279,7 +279,7 @@ if (transp) get_user(htransp, transp); else - htransp = 0; + htransp = 0xffff; } red++; green++; Gr{oetje,eeting}s, Geert
-- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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