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| author | Michael Drake <tlsa@netsurf-browser.org> | 2013-10-02 23:33:46 +0100 |
|---|---|---|
| committer | Michael Drake <tlsa@netsurf-browser.org> | 2013-10-02 23:33:46 +0100 |
| commit | 506a0e7d940abb6a95a890caf024743a993c8dcd (patch) | |
| tree | d9b84c6e18eadca4461ae979bca23b4d52a85387 /desktop | |
| parent | f19e827983518a65a65aa7ab663c59a921b02fa4 (diff) | |
| download | netsurf-506a0e7d940abb6a95a890caf024743a993c8dcd.tar.gz netsurf-506a0e7d940abb6a95a890caf024743a993c8dcd.tar.bz2 | |
Add accessors for individual colour channels.
Diffstat (limited to 'desktop')
| -rw-r--r-- | desktop/plot_style.h | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/desktop/plot_style.h b/desktop/plot_style.h index 71243a9a9..45813d40d 100644 --- a/desktop/plot_style.h +++ b/desktop/plot_style.h @@ -75,9 +75,21 @@ ((c0 & 0x00ff00) * ( p)) ) >> 8) & 0x00ff00)) /* get a bitmap pixel (image/bitmap.h) into a plot colour */ -#define pixel_to_colour(b) \ +#define pixel_to_colour(b) \ b[0] | (b[1] << 8) | (b[2] << 16) | (b[3] << 24) +/* Get the red channel from a colour */ +#define red_from_colour(c) \ + ((c ) & 0xff) + +/* Get the green channel from a colour */ +#define green_from_colour(c) \ + ((c >> 8) & 0xff) + +/* Get the blue channel from a colour */ +#define blue_from_colour(c) \ + ((c >> 16) & 0xff) + /** * Colour type: XBGR */ |