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Issue 490: color 255 selected FG by default

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git-svn-id: svn://pulkomandy.tk/GrafX2/trunk@2021 416bcca6-2ee7-4201-b75f-2eb2f807beb1
This commit is contained in:
Yves Rizoud
2012-09-30 16:25:52 +00:00
parent 919357ab46
commit fbdde8d16c
3 changed files with 50 additions and 2 deletions
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41
src/windows.c
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@@ -2702,7 +2702,48 @@ byte Best_color_nonexcluded(byte red,byte green,byte blue)
return best_color;
}
byte Best_color_range(byte r, byte g, byte b, byte max)
{
int col;
float best_diff=255.0*1.56905;
byte best_color=0;
float target_bri;
float bri;
float diff_b, diff_c, diff;
// Similar to Perceptual_lightness();
target_bri = sqrt(0.26*r*0.26*r + 0.55*g*0.55*g + 0.19*b*0.19*b);
for (col=0; col<max; col++)
{
if (Exclude_color[col])
continue;
diff_c = sqrt(
(0.26*(Main_palette[col].R-r))*
(0.26*(Main_palette[col].R-r))+
(0.55*(Main_palette[col].G-g))*
(0.55*(Main_palette[col].G-g))+
(0.19*(Main_palette[col].B-b))*
(0.19*(Main_palette[col].B-b)));
// Exact match
if (diff_c==0)
return col;
bri = sqrt(0.26*Main_palette[col].R*0.26*Main_palette[col].R + 0.55*Main_palette[col].G*0.55*Main_palette[col].G + 0.19*Main_palette[col].B*0.19*Main_palette[col].B);
diff_b = abs(target_bri-bri);
diff=0.25*(diff_b-diff_c)+diff_c;
if (diff<best_diff)
{
best_diff=diff;
best_color=col;
}
}
return best_color;
}
byte Best_color_perceptual(byte r,byte g,byte b)
{