Beatmup::FloatBilinearInterpolator< scanner, pixel > Class Template Reference

Floating point bitmap bilinear interpolation, implemented using pixel arithmetics. More...

#include <interpolation.h>

Inheritance diagram for Beatmup::FloatBilinearInterpolator< scanner, pixel >:

Public Member Functions
	FloatBilinearInterpolator (const AbstractBitmap &bitmap, int x=0, int y=0)
pixel	operator() () const
pixel	operator() (float x, float y) const

Detailed Description

template<class scanner, typename pixel>
class Beatmup::FloatBilinearInterpolator< scanner, pixel >

Floating point bitmap bilinear interpolation, implemented using pixel arithmetics.

Definition at line 190 of file interpolation.h.

Constructor & Destructor Documentation

FloatBilinearInterpolator()

template<class scanner , typename pixel >

Beatmup::FloatBilinearInterpolator< scanner, pixel >::FloatBilinearInterpolator ( const AbstractBitmap &  bitmap, int  x = 0, int  y = 0  )

inline

Definition at line 192 of file interpolation.h.

: scanner(bitmap, x, y) {}

Member Function Documentation

operator()() [1/2]

template<class scanner , typename pixel >

pixel Beatmup::FloatBilinearInterpolator< scanner, pixel >::operator() ( ) const

inline

Definition at line 194 of file interpolation.h.

                                        {
            return scanner::operator()();
        }

operator()() [2/2]

template<class scanner , typename pixel >

pixel Beatmup::FloatBilinearInterpolator< scanner, pixel >::operator() ( float  x, float  y  ) const

inline

Definition at line 198 of file interpolation.h.

                                                        {
            int ix = (int)x, iy = (int)y;
            pixel* p = (pixel*)scanner::jump(ix, iy);
            if (ix < scanner::width-1) {
                float fx = x - ix;
                if (iy < scanner::height-1) {
                    float fy = y - iy;
                    return (p[0] * (1 - fx) + p[1] * fx) * (1 - fy) + (p[scanner::width] * (1 - fx) + p[scanner::width + 1] * fx) * fy;
                }
                else
                    return p[0] * (1 - fx) + p[1] * fx;
            }
            else
                if (iy < scanner::height-1) {
                    float fy = y - iy;
                    return p[0] * (1 - fy) + p[scanner::width] * fy;
                }
                else
                    return p[0];
        }

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

• core/bitmap/interpolation.h