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LibWeb: Implement rounding for PixelUnits

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This commit is contained in:
Hendiadyoin1 2023-07-29 16:01:50 +02:00 • committed by Alexander Kalenik
parent cc74083f27
commit 6c341ca985
79 changed files with 1638 additions and 1600 deletions
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14
Userland/Libraries/LibWeb/PixelUnits.h
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@ -254,20 +254,22 @@ inline Web::CSSPixels abs(Web::CSSPixels const& value)
constexpr Web::CSSPixels floor(Web::CSSPixels const& value)
{
// FIXME: Actually floor value
return value;
return Web::CSSPixels::from_raw(value.raw_value() & ~Web::CSSPixels::radix_mask);
}
constexpr Web::CSSPixels ceil(Web::CSSPixels const& value)
{
// FIXME: Actually ceil value
return value;
auto floor_value = value.raw_value() & ~Web::CSSPixels::radix_mask;
auto ceil_value = floor_value + (value.raw_value() & Web::CSSPixels::radix_mask ? Web::CSSPixels::fixed_point_denominator : 0);
return Web::CSSPixels::from_raw(ceil_value);
}
constexpr Web::CSSPixels round(Web::CSSPixels const& value)
{
// FIXME: Actually round value
return value;
// FIXME: Maybe do this with bit-fiddling instead
if (value > 0)
return floor(value + Web::CSSPixels::from_raw(Web::CSSPixels::fixed_point_denominator >> 1 /* 0.5 */));
return ceil(value - Web::CSSPixels::from_raw(Web::CSSPixels::fixed_point_denominator >> 1 /* 0.5 */));
}
constexpr Web::DevicePixels abs(Web::DevicePixels const& value)