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| author | Michael Drake <tlsa@netsurf-browser.org> | 2013-07-08 17:41:06 +0100 |
|---|---|---|
| committer | Michael Drake <tlsa@netsurf-browser.org> | 2013-07-08 17:41:06 +0100 |
| commit | e9401de768fa2a3c37bc3f13a06bb3bc32c8dc4c (patch) | |
| tree | 047d036fb96883f0c237b698b520b2ad6169cf91 /desktop/plot_style.h | |
| parent | 81a1506c5c3a5b1581c3f16350a64ce58e695c09 (diff) | |
| download | netsurf-e9401de768fa2a3c37bc3f13a06bb3bc32c8dc4c.tar.gz netsurf-e9401de768fa2a3c37bc3f13a06bb3bc32c8dc4c.tar.bz2 | |
Move mix_colour macro out of treeview for other stuff to use.
Diffstat (limited to 'desktop/plot_style.h')
| -rw-r--r-- | desktop/plot_style.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/desktop/plot_style.h b/desktop/plot_style.h index f965a2578..71243a9a9 100644 --- a/desktop/plot_style.h +++ b/desktop/plot_style.h @@ -66,6 +66,14 @@ (((c0 & 0xff0000) * 28) >> 24)) > \ (0xff / 2)) ? 0x000000 : 0xffffff) +/* Mix two colours according to the proportion given by p, where 0 <= p <= 255 + * p = 0 gives result ==> c1, p = 255 gives result ==> c0 */ +#define mix_colour(c0, c1, p) \ + ((((((c1 & 0xff00ff) * (255 - p)) + \ + ((c0 & 0xff00ff) * ( p)) ) >> 8) & 0xff00ff) | \ + (((((c1 & 0x00ff00) * (255 - p)) + \ + ((c0 & 0x00ff00) * ( p)) ) >> 8) & 0x00ff00)) + /* get a bitmap pixel (image/bitmap.h) into a plot colour */ #define pixel_to_colour(b) \ b[0] | (b[1] << 8) | (b[2] << 16) | (b[3] << 24) |