diff options
Diffstat (limited to 'libdimension/color.c')
| -rw-r--r-- | libdimension/color.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/libdimension/color.c b/libdimension/color.c index 07d8ed8..6de8d0a 100644 --- a/libdimension/color.c +++ b/libdimension/color.c @@ -200,6 +200,19 @@ dmnsn_apply_filter(dmnsn_color color, dmnsn_color filter) return dmnsn_apply_translucency(dmnsn_filter_light(color, filter), filter); } +/* Remove the filter channel */ +dmnsn_color +dmnsn_remove_filter(dmnsn_color color) +{ + double intensity = dmnsn_color_intensity(color); + double newtrans = (1.0 - (1.0 - intensity)*color.filter)*color.trans; + if (1.0 - newtrans >= dmnsn_epsilon) + color = dmnsn_color_mul((1.0 - color.trans)/(1.0 - newtrans), color); + color.trans = newtrans; + color.filter = 0.0; + return color; +} + /* Illuminates `color' with `light' */ dmnsn_color dmnsn_color_illuminate(dmnsn_color light, dmnsn_color color) |