tt::SDF8 Struct Reference

#include <TTauri/Foundation/SDF8.hpp>

Inheritance diagram for tt::SDF8:

Public Member Functions
	SDF8 (SDF8 const &other) noexcept=default
	SDF8 (SDF8 &&other) noexcept=default
SDF8 &	operator= (SDF8 const &other) noexcept=default
SDF8 &	operator= (SDF8 &&other) noexcept=default
	SDF8 (float rhs) noexcept
SDF8 &	operator= (float rhs) noexcept
	operator float () const noexcept
void	repair () noexcept
Public Member Functions inherited from tt::R8SNorm
	R8SNorm (R8SNorm const &rhs) noexcept=default
	R8SNorm (R8SNorm &&rhs) noexcept=default
R8SNorm &	operator= (R8SNorm const &rhs) noexcept=default
R8SNorm &	operator= (R8SNorm &&rhs) noexcept=default
	R8SNorm (float rhs) noexcept
R8SNorm &	operator= (float rhs) noexcept
	operator float () const noexcept

Static Public Attributes
static constexpr float	max_distance = 3.0f
	Max distance in pixels represented by the signed distance field.
static constexpr float	one_over_max_distance = 1.0f / max_distance

Additional Inherited Members
Data Fields inherited from tt::R8SNorm
int8_t	value

Detailed Description

A pixel of a single channel signed distance field.

https://steamcdn-a.akamaihd.net/apps/valve/2007/SIGGRAPH2007_AlphaTestedMagnification.pdf

Field Documentation

max_distance

constexpr float tt::SDF8::max_distance = 3.0f

staticconstexpr

Max distance in pixels represented by the signed distance field.

The max_distance determines the maximum size of the shadow compared to the font as drawn into the atlas. The maximum distance needs to be at least the diagonal distance between two pixels for proper linear-interpolation sqrt(1.0*1.0 + 1.0*1.0).

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The documentation for this struct was generated from the following file:

• hikogui/src/TTauri/Foundation/SDF8.hpp