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/home/landauf/painter/miniproject/image/imagergba.h

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//
//    Title: imagergba.h
//  Created: Tue Oct  2 18:27:26 2001
//   Author: Tim Weyrich <weyrich@inf.ethz.ch>
//
// copyright (c) 2001--2003, Computer Graphics Laboratory, ETH Zuerich
//

#ifndef __IMAGERGBA_H__
#define __IMAGERGBA_H__


//#include "../effects/classes.h"
typedef struct
{
  unsigned char  r;             
  unsigned char  g;             
  unsigned char  b;             
  unsigned char  a;             
} Rgba;

typedef struct
{
  float  h;            
  float  s;            
  float  v;            
  unsigned char  a;    
} Hsva;




typedef struct
{
  int    width;                 
  int    height;                
  
  int    bytesPerPixel;         
  

  Rgba  *data;
} ImageRGBA;


extern ImageRGBA  *imageRgbaNew(int width, int height);

extern void        imageRgbaFree(ImageRGBA *img);


extern ImageRGBA  *imageRgbaClone(const ImageRGBA *img);


extern void                     imageRgbaCopy(const ImageRGBA *src, const ImageRGBA *dest);


extern void        imageRgbaClear(ImageRGBA *img);

extern void        imageRgbaSet(ImageRGBA *img,
                                unsigned r, unsigned g, unsigned b, unsigned a);
                                
extern void imageRgbaSetArea(ImageRGBA *img, int x0, int y0, int x1, int y1, Rgba color);

extern ImageRGBA  *imageRgbaReadTIFF(const char *fname);

extern int         imageRgbaWriteTIFF(const char *fname, const ImageRGBA *img);



//extern void  imageRgbaDrawLine(ImageRGBA *img, int x0, int y0, int x1, int y1, Rgba colorValue);
extern void  imageRgbaDrawLine(ImageRGBA *img, int x0, int y0, int x1, int y1, Rgba colorValue, int lx0 = 0, int ly0 = 0, int lx1 = -1, int ly1 = -1);


//extern void  imageRgbaInvertLine(ImageRGBA *img, int x0, int y0, int x1, int y1);
extern void  imageRgbaInvertLine(ImageRGBA *img, int x0, int y0, int x1, int y1, int lx0 = 0, int ly0 = 0, int lx1 = -1, int ly1 = -1);

// Draws a black-and-white line
extern void imageRgbaDrawHorizontalAreaLine(ImageRGBA *img, int x0, int x1, int y, int colorOffset);
extern void imageRgbaDrawVerticalAreaLine(ImageRGBA *img, int y0, int y1, int x, int colorOffset);


extern void  imageRgbaDrawEllipse(ImageRGBA *img, int cx, int cy, int halfaxis_x, int halfaxis_y, Rgba colorValue, int lx0 = 0, int ly0 = 0, int lx1 = -1, int ly1 = -1);



extern void  imageRgbaInvertEllipse(ImageRGBA *img, int cx, int cy, int a, int b);



extern inline void  imageRgbaDrawPoint(ImageRGBA *img, int x, int y, Rgba colorValue);


extern inline void  imageRgbaDrawInvertedPoint(ImageRGBA *img, int x, int y);

Rgba imageRgbaInterpolate(ImageRGBA *img, float x, float y);
int imageRgbaInterpolateSubImage(ImageRGBA *img, float x, float y, int w, int h, int offset);
Rgba imageRgbaInterpolateColors(float x, float y, Rgba topleft, Rgba topright, Rgba bottomleft, Rgba bottomright);

Hsva RGBtoHSV(Rgba RGBColor);
Rgba HSVtoRGB(Hsva HSVColor);

void gaussian(ImageRGBA *img, ImageRGBA *temp2, int lowAreaX, int lowAreaY, int highAreaX, int highAreaY, float value1, int mode, unsigned char calc = 1);
void horizontal_blur(ImageRGBA *img, ImageRGBA *temp2, int lowAreaX, int lowAreaY, int highAreaX, int highAreaY, float value1, int mode, unsigned char calc = 1);
void vertical_blur(ImageRGBA *img, ImageRGBA *temp2, int lowAreaX, int lowAreaY, int highAreaX, int highAreaY, float value1, int mode, unsigned char calc = 1);
void motion_blur(ImageRGBA *img, ImageRGBA *temp2, int lowAreaX, int lowAreaY, int highAreaX, int highAreaY, float value1, float value2, int mode, unsigned char calc = 1);

void holdHighest(int *stack, int numElements, int newElement);

#endif

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