pdfium 例子

#include <stdio.h>

#include <fpdfview.h>

int main(int argc, char** argv) {
  FPDF_InitLibrary();
  FPDF_DOCUMENT doc;
  FPDF_PAGE page;
  doc = FPDF_LoadDocument("foxit_sdk.pdf", NULL);
  if (doc == NULL) {
    printf("failed to open test document\n");
    return 1;
  }
  int numPages = FPDF_GetPageCount(doc);
  printf("document has %d pages\n", numPages);
  for (int i = 0; i < numPages; ++i) {
    page = FPDF_LoadPage(doc, i);
    if (page == NULL) {
      printf("failed to open page %s\n", i);
      continue;;
    }
    double width = FPDF_GetPageWidth(page);
    double height = FPDF_GetPageHeight(page);
    printf("page %d is : %f x %f\n", i, width, height);
  }
  FPDF_DestroyLibrary();
  return 0;
}

　　https://github.com/cgilling/build-pdfium/blob/67e5e6eadaf474283ff8e6f47b9454330bf61a76/pdfium_test/main.cc