Write a PNG chunk all at once. The type is an array of ASCII characters * representing the chunk name. The array must be at least 4 bytes in * len

Create an error message in allocated memory and set state->err and state->msg accordingly. Free any previous error message already there. Do n

Write the data of a PNG chunk started with png_write_chunk_start(). * Note that multiple calls to this function are allowed, and that the * sum of t

Place a 16-bit number into a buffer in PNG byte order. * The parameter is declared unsigned int, not png_uint_16, * just to avoid potential problems

========================================================================= */

========================================================================= */

Return a random float between min and max

=========================================================================== * Display error message and exit */