csr32f.h

   1  // Implementation of: Portable float-map
   2 //  Spec: https://web.archive.org/web/20100708234919/gl.ict.usc.edu/HDRShop/PFM/PFM_Image_File_Format.html
   3 //  Known to work in: Substance Designer ( Use node format c32f )
   4
   5 // Write pfm file to disk (32 bpc, RGB floats) (96 bits per pixel)
   6 int csr_32f_write( char const *path, int w, int h, float const *buffer )
   7 {
   8         FILE *write_ptr;
   9         uint32_t image_size_bytes;
  10
  11         write_ptr = fopen( path, "wb" );
  12
  13         if( !write_ptr )
  14                 return 0;
  15
  16         // Write header (little endian)
  17         fprintf( write_ptr, "PF\n%d %d\n-1.0\n", w, h );
  18
  19         image_size_bytes = w * h * sizeof( float ) * 3;
  20
  21         // Write data
  22         fwrite( buffer, image_size_bytes, 1, write_ptr );
  23
  24         fclose( write_ptr );
  25
  26         return 1;
  27 }