Ptex
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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 from 16-bit integer. | |
int | u () const |
U resolution in texels. | |
int | v () const |
V resolution in texels. | |
uint16_t & | val () |
Resolution as a single 16-bit integer value. | |
const 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 | |
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.