diff options
Diffstat (limited to 'server')
| -rw-r--r-- | server/epdfinfo.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/server/epdfinfo.c b/server/epdfinfo.c index b82cb6f..ef14e41 100644 --- a/server/epdfinfo.c +++ b/server/epdfinfo.c @@ -508,6 +508,9 @@ image_recolor (cairo_surface_t * surface, const PopplerColor * fg, .g = rgb_bg.g - rgb_fg.g, .b = rgb_bg.b - rgb_fg.b }; + const double fg_l = a[0] * rgb_fg.r + a[1] * rgb_fg.g + a[2] * rgb_fg.b; + const double bg_l = a[0] * rgb_bg.r + a[1] * rgb_bg.g + a[2] * rgb_bg.b; + const double diff_l = fg_l - bg_l; /* The Oklab transform is expensive, precompute white->black and have a single entry cache to speed up computation */ @@ -576,8 +579,8 @@ image_recolor (cairo_surface_t * surface, const PopplerColor * fg, * 'feel' too dark and fonts too thin otherwise. */ oklab.l = pow(oklab.l, 1.8); - /* Invert the perceived lightness */ - oklab.l = 1.0 - oklab.l; + /* Invert the perceived lightness, and scales it */ + oklab.l = bg_l + diff_l * (1.0 - oklab.l); rgb = oklab2rgb(oklab); |