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 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().

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

• Ptexture.h