Lines Matching refs:signature
119 /* Read and check the PNG file signature */
125 /* Exit if the user application does not expect a signature. */
136 /* The signature must be serialized in a single I/O call. */
137 png_read_data(png_ptr, &(info_ptr->signature[num_checked]), num_to_check);
140 if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check) != 0)
143 png_sig_cmp(info_ptr->signature, num_checked, num_to_check - 4))
