ppmio.h

weilevoy算法实现纹理合成,分带与不带加速两个版本

/**************************************************************************
 * ppmIO.h
 * These functions read and write ppm files in the format output by 
 * cqcam and xv. 
 * Written by Elizabeth Gordon 6-98
 * Modified to read xv output images by Bruce Maxwell 7-98
 *************************************************************************/
#ifndef PPMIO_H

#define PPMIO_H

typedef struct {
  unsigned char r;
  unsigned char g;
  unsigned char b;
} Pixel;

#define MAX_TEXPLANES 50

typedef struct {
  long rows;
  long cols;
  int planes;
  float *d[MAX_TEXPLANES];
} TexImage;

Pixel *readPPM(int *rows, int *cols, int * colors, char *filename);
void writePPM(Pixel *image, int rows, int cols, int colors, char *filename);
void writeRPM(Pixel *image, int rows, int cols, int colors, char *filename);

TexImage *CreateTEX(long rows, long cols, long planes);
void FreeTEX(TexImage *);
void writeTEX(TexImage *image, char *filename);
TexImage *readTEX(char *filename);

unsigned char *readPGM(int *rows, int *cols, int *intensities, char *filename);
void writePGM(unsigned char *image, long rows, long cols, int intensities, char *filename);


#endif