#include <stdio.h>
#include <vips/vips.h>

int main(int argc, char **argv) {
  if (VIPS_INIT("testing")) {
    vips_error_exit(NULL);
  }

  // Option 1: vips_jpegload with autorotate to TRUE
  VipsImage *loaded_jpeg;
  if (vips_jpegload("example.jpeg", &loaded_jpeg, "autorotate", TRUE, NULL) == -1) {
    vips_error_exit(NULL);
  }

  int orientation;
  if (vips_image_get_int(loaded_jpeg, VIPS_META_ORIENTATION, &orientation) == -1) {
    vips_error_exit(NULL);
  }
  printf("Orientation: %d\n", orientation);

  VipsImage *saved_jpeg;
  if (vips_thumbnail_image(loaded_jpeg, &saved_jpeg, 250, "no-rotate", TRUE, NULL) == -1) {
    vips_error_exit(NULL);
  }

  if (vips_jpegsave(saved_jpeg, "output.jpeg", NULL) == -1) {
    vips_error_exit(NULL);
  }

  return(0);
}

#include <stdio.h>
#include <vips/vips.h>

int main(int argc, char **argv) {
  if (VIPS_INIT("testing")) {
    vips_error_exit(NULL);
  }

  // Option 2: vips_jpegload with autorotate to FALSE and execute vips_autorot
  VipsImage *loaded_jpeg;
  if (vips_jpegload("example.jpeg", &loaded_jpeg, "autorotate", FALSE, NULL) == -1) {
    vips_error_exit(NULL);
  }

  VipsImage *autorot_jpeg;
  if (vips_autorot(loaded_jpeg, &autorot_jpeg, NULL) == -1) {
    vips_error_exit(NULL);
  }

  int orientation;
  if (vips_image_get_int(autorot_jpeg, VIPS_META_ORIENTATION, &orientation) == -1) {
    vips_error_exit(NULL);
  }
  printf("Orientation: %d\n", orientation);

  VipsImage *saved_jpeg;
  if (vips_thumbnail_image(autorot_jpeg, &saved_jpeg, 250, "no-rotate", TRUE, NULL) == -1) {
    vips_error_exit(NULL);
  }

  if (vips_jpegsave(saved_jpeg, "output.jpeg", NULL) == -1) {
    vips_error_exit(NULL);
  }

  return(0);
}