mewin/nana
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

unify semantics of the blend methods

Browse Source
This commit is contained in:
Jinhao
2017-04-15 11:30:16 +08:00
parent f261fa296e
commit 4e9646cf64
24 changed files with 108 additions and 135 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
source/paint/detail/native_paint_interface.cpp
View File

@@ -100,16 +100,16 @@ namespace detail
void blend(drawable_type dw, const rectangle& area, pixel_color_t color, double fade_rate)
{
if (fade_rate < 0)
fade_rate = 0;
else if (fade_rate >= 1)
if (fade_rate <= 0)
return;
else if (fade_rate >= 1)
fade_rate = 1;
rectangle r;
if (false == ::nana::overlap(rectangle{ drawable_size(dw) }, area, r))
return;
auto const color_fd_rate = (double(color.element.alpha_channel) / 255.0) * (1 - fade_rate);
auto const color_fd_rate = (double(color.element.alpha_channel) / 255.0) * fade_rate;
fade_rate = (1 - color_fd_rate);