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| author | Antonino A. Daplas <adaplas@gmail.com> | 2005-09-09 22:04:38 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-09 22:58:00 +0200 |
| commit | 2cc38ed13f1b0f9d80a2d0acc2916af94922f27e (patch) | |
| tree | a556d3b71c2bca72762255f79f2de17a606382a7 /drivers/video/console | |
| parent | [PATCH] fbdev: Fix greater than 1 bit monochrome color handling (diff) | |
| download | linux-2cc38ed13f1b0f9d80a2d0acc2916af94922f27e.tar.xz linux-2cc38ed13f1b0f9d80a2d0acc2916af94922f27e.zip | |
[PATCH] fbcon: Saner 16-color to 4-color conversion
Currently, the default linux 16-colors are converted to 4-colors by simply
dividing the values by 4. However, this is not necessarily correct since the
first 4 colors are converted to black, rendering them invisible.
So, for black, no conversion; for light colors, convert to gray, for normal
text color, no conversion, and for bright colors, convert to intense white.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/video/console')
| -rw-r--r-- | drivers/video/console/fbcon.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c index 88bd8ef56fde..bb4ea50b54a3 100644 --- a/drivers/video/console/fbcon.c +++ b/drivers/video/console/fbcon.c @@ -247,9 +247,26 @@ static inline int get_color(struct vc_data *vc, struct fb_info *info, case 2: /* * Scale down 16-colors to 4 colors. Default 4-color palette - * is grayscale. + * is grayscale. However, simply dividing the values by 4 + * will not work, as colors 1, 2 and 3 will be scaled-down + * to zero rendering them invisible. So empirically convert + * colors to a sane 4-level grayscale. */ - color /= 4; + switch (color) { + case 0: + color = 0; /* black */ + break; + case 1 ... 6: + color = 2; /* white */ + break; + case 7 ... 8: + color = 1; /* gray */ + break; + default: + color = 3; /* intense white */ + break; + } + break; case 3: /* * Last 8 entries of default 16-color palette is a more intense |