This function is called whenever there is a non-fatal error. This function * should not be changed. If there is a need to handle warnings different

Optionally skip data and then check the CRC. Depending on whether we * are reading an ancillary or critical chunk, and how the program has set * th

Free a pointer allocated by png_malloc(). If ptr is NULL, return * without taking any action. */

muldiv functions */ This API takes signed arguments and rounds the result to the nearest * integer (or, for a fixed point number - the standard argum

NON_MATCHING: I don't have a damn clue

Read data, and (optionally) run it through the CRC. */

NOTE: E_LINEAR values to this routine must be 16-bit, but E_FILE values must * be 8-bit. */

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

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_header(). * Note that multiple calls to this function are allowed, and that the * sum of

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

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

This is the shared test on whether a gamma value is 'significant' - whether * it is worth doing gamma correction. */

Utility to safely appends strings to a buffer. This never errors out so * error checking is not required in the caller. */

more fixed point functions for gamma */ Calculate a reciprocal, return 0 on div-by-zero or overflow. */

Is it OK to set a transformation now? Only if png_start_read_image or * png_read_update_info have not been called. It is not necessary for the IHDR