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LibWeb: Make CSSPixels and Length use 64-bit (double) floating point

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This fixes a plethora of rounding problems on many websites.
In the future, we may want to replace this with fixed-point arithmetic
(bug #18566) for performance (and consistency with other engines),
but in the meantime this makes the web look a bit better. :^)

There's a lot more things that could be converted to doubles, which
would reduce the amount of casting necessary in this patch.
We can do that incrementally, however.
This commit is contained in:
Andreas Kling 2023-05-24 10:50:57 +02:00
parent 30262d7023
commit 655d9d1462
80 changed files with 298 additions and 299 deletions
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14
Userland/Libraries/LibWeb/Layout/FlexFormattingContext.h
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@ -35,7 +35,7 @@ private:
[[nodiscard]] bool should_treat_cross_size_as_auto(Box const&) const;
[[nodiscard]] CSSPixels adjust_main_size_through_aspect_ratio_for_cross_size_min_max_constraints(Box const&, CSSPixels main_size, CSS::Size const& min_cross_size, CSS::Size const& max_cross_size) const;
[[nodiscard]] CSSPixels calculate_main_size_from_cross_size_and_aspect_ratio(CSSPixels cross_size, float aspect_ratio) const;
[[nodiscard]] CSSPixels calculate_main_size_from_cross_size_and_aspect_ratio(CSSPixels cross_size, double aspect_ratio) const;
void dump_items() const;
@ -61,9 +61,9 @@ private:
CSSPixels hypothetical_cross_size_with_margins() { return hypothetical_cross_size + margins.cross_before + margins.cross_after + borders.cross_after + borders.cross_before + padding.cross_after + padding.cross_before; }
CSSPixels target_main_size { 0 };
bool frozen { false };
Optional<float> flex_factor {};
float scaled_flex_shrink_factor { 0 };
float desired_flex_fraction { 0 };
Optional<double> flex_factor {};
double scaled_flex_shrink_factor { 0 };
double desired_flex_fraction { 0 };
CSSPixels outer_hypothetical_main_size() const
{
@ -109,10 +109,10 @@ private:
Vector<FlexItem&> items;
CSSPixels cross_size { 0 };
CSSPixels remaining_free_space { 0 };
float chosen_flex_fraction { 0 };
double chosen_flex_fraction { 0 };
float sum_of_flex_factor_of_unfrozen_items() const;
float sum_of_scaled_flex_shrink_factor_of_unfrozen_items() const;
double sum_of_flex_factor_of_unfrozen_items() const;
double sum_of_scaled_flex_shrink_factor_of_unfrozen_items() const;
};
CSSPixels main_gap() const;