lauchmelder/SDLU
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Corrected color arithmetic

Browse source
This commit is contained in:
Robert 2020-05-18 15:53:32 +02:00
parent 5b84b15ed2
commit cea768fce1
1 changed files with 16 additions and 32 deletions
Download patch file Download diff file Expand all files Collapse all files

48
SDLU/structures/Color.cpp
View file

@ -96,26 +96,26 @@ namespace sdlu
Color operator+(const Color& left, const Color& right) Color operator+(const Color& left, const Color& right)
{ {
return Color(left.r + right.r, return Color((UINT8_MAX - left.r) < right.r ? 255 : left.r + right.r,
left.g + right.g, (UINT8_MAX - left.g) < right.g ? 255 : left.g + right.g,
left.b + right.b, (UINT8_MAX - left.b) < right.b ? 255 : left.b + right.b,
left.a + right.a); (UINT8_MAX - left.a) < right.a ? 255 : left.a + right.a);
} }
Color operator-(const Color& left, const Color& right) Color operator-(const Color& left, const Color& right)
{ {
return Color(left.r - right.r, return Color(left.r < right.r ? 0 : left.r - right.r,
left.g - right.g, left.g < right.g ? 0 : left.g - right.g,
left.b - right.b, left.b < right.b ? 0 : left.b - right.b,
left.a - right.a); left.a < right.a ? 0 : left.a - right.a);
} }
Color operator*(const Color& left, const Color& right) Color operator*(const Color& left, const Color& right)
{ {
return Color(left.r * right.r, return Color((UINT8_MAX / left.r) < right.r ? 255 : left.r * right.r,
left.g * right.g, (UINT8_MAX / left.g) < right.g ? 255 : left.g * right.g,
left.b * right.b, (UINT8_MAX / left.b) < right.b ? 255 : left.b * right.b,
left.a * right.a); (UINT8_MAX / left.a) < right.a ? 255 : left.a * right.a);
} }
Color operator/(const Color& left, const Color& right) Color operator/(const Color& left, const Color& right)
@ -128,41 +128,25 @@ namespace sdlu
Color& operator+=(Color& left, const Color& right) Color& operator+=(Color& left, const Color& right)
{ {
left.r += right.r; left = left + right;
left.g += right.g;
left.b += right.b;
left.a += right.a;
return left; return left;
} }
Color& operator-=(Color& left, const Color& right) Color& operator-=(Color& left, const Color& right)
{ {
left.r -= right.r; left = left - right;
left.g -= right.g;
left.b -= right.b;
left.a -= right.a;
return left; return left;
} }
Color& operator*=(Color& left, const Color& right) Color& operator*=(Color& left, const Color& right)
{ {
left.r *= right.r; left = left * right;
left.g *= right.g;
left.b *= right.b;
left.a *= right.a;
return left; return left;
} }
Color& operator/=(Color& left, const Color& right) Color& operator/=(Color& left, const Color& right)
{ {
left.r /= right.r; left = left / right;
left.g /= right.g;
left.b /= right.b;
left.a /= right.a;
return left; return left;
} }