Beatmup::TripleByteBilinearInterpolator Class Reference

Triple byte bitmap bilinear interpolation. More...

#include <interpolation.h>

Inheritance diagram for Beatmup::TripleByteBilinearInterpolator:

Public Member Functions
	TripleByteBilinearInterpolator (const AbstractBitmap &bitmap, int x=0, int y=0)
pixint3	operator() () const
pixint3	operator() (float x, float y) const
Public Member Functions inherited from Beatmup::TripleByteBitmapReader
pixint3	operator() () const
pixint3	operator() (int x, int y) const
const pixint3	operator[] (int i) const
	Retrieves a value at position shifted by i pixels in scanline order with respect to the current position. More...
	TripleByteBitmapReader (const AbstractBitmap &bitmap, int x=0, int y=0)
Public Member Functions inherited from Beatmup::CustomBitmapScanner< pixbyte, 3 >
bool	operator< (const CustomBitmapScanner &another) const
pixbyte *	operator* () const
void	operator++ (int)
	Move the current position ONE PIXEL forward. More...
void	operator+= (const int n)
	Move the current position N pixels forward. More...
void	goTo (int x, int y)
	Changes current position. More...
int	getWidth () const
	Returns bitmap width in pixels. More...
int	getHeight () const
	Returns bitmap height in pixels. More...
	CustomBitmapScanner (const AbstractBitmap &bitmap, int x=0, int y=0)

Additional Inherited Members
Public Types inherited from Beatmup::TripleByteBitmapReader
typedef pixint3	pixtype
Public Types inherited from Beatmup::CustomBitmapScanner< pixbyte, 3 >
typedef pixbyte	pixvaltype
Public Attributes inherited from Beatmup::TripleByteBitmapReader
const int	MAX_VALUE = 255
Public Attributes inherited from Beatmup::CustomBitmapScanner< pixbyte, 3 >
const int	NUMBER_OF_CHANNELS
Protected Member Functions inherited from Beatmup::CustomBitmapScanner< pixbyte, 3 >
pixbyte *	jump (int x, int y) const
	Retrieves pixel address at a given position;. More...
Protected Attributes inherited from Beatmup::CustomBitmapScanner< pixbyte, 3 >
pixbyte *	data
	bitmap data More...
pixbyte *	ptr
	pointer to the current pixel More...
int	width
int	height
	bitmap sizes in pixels More...

Detailed Description

Triple byte bitmap bilinear interpolation.

Definition at line 81 of file interpolation.h.

Constructor & Destructor Documentation

TripleByteBilinearInterpolator()

Beatmup::TripleByteBilinearInterpolator::TripleByteBilinearInterpolator ( const AbstractBitmap &  bitmap, int  x = 0, int  y = 0  )

inline

Definition at line 83 of file interpolation.h.

: TripleByteBitmapReader(bitmap, x, y) {}

Member Function Documentation

operator()() [1/2]

pixint3 Beatmup::TripleByteBilinearInterpolator::operator() ( ) const

inline

Definition at line 85 of file interpolation.h.

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

operator()() [2/2]

pixint3 Beatmup::TripleByteBilinearInterpolator::operator() ( float  x, float  y  ) const

inline

Definition at line 89 of file interpolation.h.

                                                          {
            int
                ix = (int)x, iy = (int)y,
                i1 = 3 * width;
            pixbyte* p = jump(ix, iy);
            if (ix < width-1) {
                float fx = x - ix;
                if (iy < height-1) {
                    float
                        fy = y - iy,
                        w0 = (1 - fx) * (1 - fy),
                        w1 = fx * (1 - fy),
                        w2 = (1 - fx) * fy,
                        w3 = fx*fy;
                    return pixint3 {
                        roundf_fast(p[0] * w0 + p[3] * w1 + p[i1  ] * w2 + p[i1+3] * w3),
                        roundf_fast(p[1] * w0 + p[4] * w1 + p[i1+1] * w2 + p[i1+4] * w3),
                        roundf_fast(p[2] * w0 + p[5] * w1 + p[i1+2] * w2 + p[i1+5] * w3)
                    };
                }
                else
                    return pixint3{
                        roundf_fast(p[0] * (1 - fx) + p[3] * fx),
                        roundf_fast(p[1] * (1 - fx) + p[4] * fx),
                        roundf_fast(p[2] * (1 - fx) + p[5] * fx)
                    };
            }
            else
                if (iy < height-1) {
                    float fy = y - iy;
                    return pixint3{
                        roundf_fast(p[0] * (1 - fy) + p[i1  ] * fy),
                        roundf_fast(p[1] * (1 - fy) + p[i1+1] * fy),
                        roundf_fast(p[2] * (1 - fy) + p[i1+2] * fy)
                    };
                }
                else
                    return pixint3{ p[0], p[1], p[2] };
        }

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

• core/bitmap/interpolation.h