void *readImage(FILE *inf, int opt, FILE *outf){
int width, height;
int max;
int r,c;
int pixel;
// Process the pgm file as a bufft
// I.e., eat the header
eatLine(inf);
eatLine(inf);
fscanf(inf,"%d",&width); // the first integer on line 1 is the width
fscanf(inf,"%d",&height); // second is the height
fscanf(inf,"%d",&max); // third is max number of pixels
float *array = malloc(sizeof(float)*width*height);
int p;
// iterate through rows and columns
// scan in graymap values, convert to pixels
// fill array with pixel values
for (r=0; r < height; r++) {
for (c=0; c < width; c++) {
fscanf(inf,"%d",&pixel);
p = c + r*width;
array[p] = (float)pixel/(float)max;
}
}
// Select function to call
//
switch (opt) {
case(ASCII):
echoASCII(array,height,width,outf);
break;
case(INV):
invert(array,height,width,outf);
case(BLUR):
blur(array,height,width,outf);
}
// exit(-1);
}
// main
//
// This program accepts three arguments: a processing option
// ("blur", "invert", or "ascii"), a PGM file name for input,
// and a text file name for output. It reads the PGM file and
// creates an output file with either an appropriate PGM (if
// one of the first two options are given) or a text file (if
// the last option is given).
//
// Right now, only the "ascii" option works.
//
int main(int argc, char **argv) {
// input and output file "handles"
FILE *inf, *outf;
if (argc < 4) {
// whoops! not enough arguments
fprintf(stderr,"Error: not enough arguments!\n");
usage(argv[0]);
return -1;
} else {
// open the input (PGM) file
inf = fopen(argv[2],"r");
if (inf == NULL) {
fprintf(stderr,"Error: can't open file '%s' for reading.\n",argv[2]);
return -1;
}
// open the output file
outf = fopen(argv[3],"w");
if (outf == NULL) {
fprintf(stderr,"Error: can't open file '%s' for writing.\n",argv[3]);
return -1;
}
if (strcmp(argv[1],"--blur") == 0) {
blurImage(inf,outf);
} else if (strcmp(argv[1],"--invert") == 0) {
invertImage(inf,outf);
//
// write the code that inverts the image
//
} else if (strcmp(argv[1],"--ascii") == 0) {
echoASCII(inf,outf);
//
// change this so that it is given an image array and
// the outf
//
} else {
fprintf(stderr,"Error: unrecognized option '%s.'\n",argv[1]);
usage(argv[0]);
// return FAIL
return -1;
}
// close the files
fclose(inf);
fclose(outf);
// return OK
return 0;
}
}
