/* test_jpegread.c  needs jpegread.c */
#include <stdio.h>
int jpegread(char file_name[], int alpha, int *width, int* height,
             unsigned char rgbpix[]);

int main(int argc, char * argv[])
{
  int status, i, j, k;
  unsigned char rgbpix[2000000];
  int width;
  int height;
  int alpha = -1;
  
  if(argc<2)
  {
    printf("test_jpegread needs a command line argument xxx.jpg\n");
    return 0;
  }
  printf("test_jpegread calling jpegread on file %s\n", argv[1]);
  
  status = jpegread(argv[1], alpha, &width, &height, rgbpix);
  
  printf("test_jpegread , alpha=%d, returned status=%d, width=%d, height=%d \n"
         ,alpha, status, width, height);
  k=0;
  for(i=0; i<width*2; i++) /* all data i<width*height; */
  {
    for(j=0; j<4; j++)
    {
      if(k/3>=width*height) break; /* last line may have some junk */
      if((k/3)%width==0) {printf("\n"); j=0;}
      printf("%03u %03u %03u  ", rgbpix[k], rgbpix[k+1], rgbpix[k+2]);
      k = k+3;
    }
    printf("\n");
    if(k/3>=width*height) break; /* last line may have some junk */
  }
  printf("test_jpegread again jpegread on file %s\n", argv[1]);
  alpha = 255;
  status = jpegread(argv[1], alpha, &width, &height, rgbpix);
  
  printf("test_jpegread , alpha=%d, returned status=%d, width=%d, height=%d \n"
         ,alpha, status, width, height);
  k=0;
  for(i=0; i<width*2; i++) /* all data i<width*height; */
  {
    for(j=0; j<4; j++)
    {
      if(k/4>=width*height) break; /* last line may have some junk */
      if((k/4)%width==0) {printf("\n"); j=0;}
      printf("%03u %03u %03u %03u  ", rgbpix[k], rgbpix[k+1],
             rgbpix[k+2], rgbpix[k+3]);
      k = k+4;
    }
    printf("\n");
    if(k/4>=width*height) break; /* last line may have some junk */
  }

  return 0;
}