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LibGfx: De-duplicate color interpolation code

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MacDue 2023-02-17 19:03:40 +00:00 • committed by Jelle Raaijmakers
parent e5a39d134b
commit 3cc074c1b0
1 changed files with 8 additions and 13 deletions
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21
Userland/Libraries/LibGfx/Color.h
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@ -239,14 +239,8 @@ public:
Color mixed_with(Color other, float weight) const
{
if (alpha() == other.alpha() || with_alpha(0) == other.with_alpha(0)) {
return Gfx::Color {
round_to<u8>(mix<float>(red(), other.red(), weight)),
round_to<u8>(mix<float>(green(), other.green(), weight)),
round_to<u8>(mix<float>(blue(), other.blue(), weight)),
round_to<u8>(mix<float>(alpha(), other.alpha(), weight)),
};
}
if (alpha() == other.alpha() || with_alpha(0) == other.with_alpha(0))
return interpolate(other, weight);
// Fallback to slower, but more visually pleasing premultiplied alpha mix.
// This is needed for linear-gradient()s in LibWeb.
auto mixed_alpha = mix<float>(alpha(), other.alpha(), weight);
@ -263,11 +257,12 @@ public:
Color interpolate(Color other, float weight) const noexcept
{
u8 r = red() + round_to<u8>(static_cast<float>(other.red() - red()) * weight);
u8 g = green() + round_to<u8>(static_cast<float>(other.green() - green()) * weight);
u8 b = blue() + round_to<u8>(static_cast<float>(other.blue() - blue()) * weight);
u8 a = alpha() + round_to<u8>(static_cast<float>(other.alpha() - alpha()) * weight);
return Color(r, g, b, a);
return Gfx::Color {
round_to<u8>(mix<float>(red(), other.red(), weight)),
round_to<u8>(mix<float>(green(), other.green(), weight)),
round_to<u8>(mix<float>(blue(), other.blue(), weight)),
round_to<u8>(mix<float>(alpha(), other.alpha(), weight)),
};
}
constexpr Color multiply(Color other) const