Ptex

Public Member Functions | Public Attributes | List of all members
Ptex::Res Struct Reference

Pixel resolution of a given texture. More...

`#include <Ptexture.h>`

## Public Member Functions
| Res ()
| Default constructor, sets res to 0 (1x1 texel).
| Res (int8_t ulog2_, int8_t vlog2_)
| Constructor.
| Res (uint16_t value)
| Constructor.
int | u () const
| U resolution in texels.
int | v () const
| V resolution in texels.
uint16_t | val () const
| Resolution as a single 16-bit integer value.
int | size () const
| Total size of specified texture in texels (u * v).
bool | operator== (const Res &r) const
| Comparison operator.
bool | operator!= (const Res &r) const
| Comparison operator.
bool | operator>= (const Res &r) const
| True if res is >= given res in both u and v directions.
Res | swappeduv () const
| Get value of resolution with u and v swapped.
void | swapuv ()
| Swap the u and v resolution values in place.
void | clamp (const Res &r)
| Clamp the resolution value against the given value.
int | ntilesu (Res tileres) const
| Determine the number of tiles in the u direction for the given tile res.
int | ntilesv (Res tileres) const
| Determine the number of tiles in the v direction for the given tile res.
int | ntiles (Res tileres) const
| Determine the total number of tiles for the given tile res.

## Public Attributes
int8_t | ulog2
| log base 2 of u resolution, in texels
int8_t | vlog2
| log base 2 of v resolution, in texels

## Detailed Description

Pixel resolution of a given texture.

The resolution is stored in log form: ulog2 = log2(ures), vlog2 = log2(vres)). Note: negative ulog2 or vlog2 values are reserved for internal use.

Definition at line 159 of file Ptexture.h.

## Constructor & Destructor Documentation

## ◆ Res() [1/3]

Ptex::Res::Res | ( |  | ) |
| inline

Default constructor, sets res to 0 (1x1 texel).

Definition at line 164 of file Ptexture.h.

Referenced by swappeduv().

## ◆ Res() [2/3]

Ptex::Res::Res | ( | int8_t | ulog2_,
|  | int8_t | vlog2_
| ) |  |
| inline

Constructor.

Definition at line 167 of file Ptexture.h.

## ◆ Res() [3/3]

Ptex::Res::Res | ( | uint16_t | value | ) |
| inline

Constructor.

Definition at line 170 of file Ptexture.h.

## Member Function Documentation

## ◆ clamp()

void Ptex::Res::clamp | ( | const Res & | r | ) |
| inline

Clamp the resolution value against the given value.

Definition at line 200 of file Ptexture.h.

References ulog2, and vlog2.

## ◆ ntiles()

int Ptex::Res::ntiles | ( | Res | tileres | ) | const
| inline

Determine the total number of tiles for the given tile res.

Definition at line 212 of file Ptexture.h.

References ntilesu(), and ntilesv().

## ◆ ntilesu()

int Ptex::Res::ntilesu | ( | Res | tileres | ) | const
| inline

Determine the number of tiles in the u direction for the given tile res.

Definition at line 206 of file Ptexture.h.

References ulog2.

Referenced by ntiles().

## ◆ ntilesv()

int Ptex::Res::ntilesv | ( | Res | tileres | ) | const
| inline

Determine the number of tiles in the v direction for the given tile res.

Definition at line 209 of file Ptexture.h.

References vlog2.

Referenced by ntiles().

## ◆ operator!=()

bool Ptex::Res::operator!= | ( | const Res & | r | ) | const
| inline

Comparison operator.

Definition at line 188 of file Ptexture.h.

## ◆ operator==()

bool Ptex::Res::operator== | ( | const Res & | r | ) | const
| inline

Comparison operator.

Definition at line 185 of file Ptexture.h.

References ulog2, and vlog2.

## ◆ operator>=()

bool Ptex::Res::operator>= | ( | const Res & | r | ) | const
| inline

True if res is >= given res in both u and v directions.

Definition at line 191 of file Ptexture.h.

References ulog2, and vlog2.

## ◆ size()

int Ptex::Res::size | ( |  | ) | const
| inline

Total size of specified texture in texels (u * v).

Definition at line 182 of file Ptexture.h.

References u(), and v().

Referenced by PtexWriterBase::calcTileRes(), PtexMainWriter::finish(), and PtexWriterBase::writeReduction().

## ◆ swappeduv()

Res Ptex::Res::swappeduv | ( |  | ) | const
| inline

Get value of resolution with u and v swapped.

Definition at line 194 of file Ptexture.h.

References Res(), ulog2, and vlog2.

Referenced by swapuv().

## ◆ swapuv()

void Ptex::Res::swapuv | ( |  | ) |
| inline

Swap the u and v resolution values in place.

Definition at line 197 of file Ptexture.h.

References swappeduv().

## ◆ u()

int Ptex::Res::u | ( |  | ) | const
| inline

U resolution in texels.

Definition at line 173 of file Ptexture.h.

References ulog2.

Referenced by PtexSeparableFilter::apply(), PtexTriangleFilter::applyIter(), PtexPointFilter::eval(), PtexPointFilterTri::eval(), size(), and PtexWriterBase::writeReduction().

## ◆ v()

int Ptex::Res::v | ( |  | ) | const
| inline

V resolution in texels.

Definition at line 176 of file Ptexture.h.

References vlog2.

Referenced by PtexSeparableFilter::apply(), PtexTriangleFilter::applyIter(), and size().

## ◆ val()

uint16_t Ptex::Res::val | ( |  | ) | const
| inline

Resolution as a single 16-bit integer value.

Definition at line 179 of file Ptexture.h.

References ulog2, and vlog2.

## Member Data Documentation

## ◆ ulog2

int8_t Ptex::Res::ulog2

log base 2 of u resolution, in texels

Definition at line 160 of file Ptexture.h.

Referenced by clamp(), ntilesu(), operator==(), operator>=(), swappeduv(), u(), and val().

## ◆ vlog2

int8_t Ptex::Res::vlog2

log base 2 of v resolution, in texels

Definition at line 161 of file Ptexture.h.

Referenced by clamp(), ntilesv(), operator==(), operator>=(), swappeduv(), v(), and val().

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

- Ptexture.h