687    png_debug(1, "in png_check_keyword");  in png_check_keyword()
760    png_debug(1, "in png_write_IHDR");  in png_write_IHDR()
926    png_debug(1, "in png_write_PLTE");  in png_write_PLTE()
1147    png_debug(1, "in png_write_IEND");  in png_write_IEND()
1160    png_debug(1, "in png_write_gAMA");  in png_write_gAMA_fixed()
1175    png_debug(1, "in png_write_sRGB");  in png_write_sRGB()
1197    png_debug(1, "in png_write_iCCP");  in png_write_iCCP()
1261    png_debug(1, "in png_write_sPLT");  in png_write_sPLT()
1339    png_debug(1, "in png_write_sBIT");  in png_write_sBIT()
1397    png_debug(1, "in png_write_cHRM");  in png_write_cHRM_fixed()
1424    png_debug(1, "in png_write_tRNS");  in png_write_tRNS()
1489    png_debug(1, "in png_write_bKGD");  in png_write_bKGD()
1552    png_debug(1, "in png_write_hIST");  in png_write_hIST()
1584    png_debug(1, "in png_write_tEXt");  in png_write_tEXt()
1628    png_debug(1, "in png_write_zTXt");  in png_write_zTXt()
1681    png_debug(1, "in png_write_iTXt");  in png_write_iTXt()
1778    png_debug(1, "in png_write_oFFs");  in png_write_oFFs()
1864    png_debug(1, "in png_write_sCAL_s");  in png_write_sCAL_s()
1894    png_debug(1, "in png_write_pHYs");  in png_write_pHYs()
1916    png_debug(1, "in png_write_tIME");  in png_write_tIME()
1960    png_debug(1, "in png_write_start_row");  in png_write_start_row()
2063    png_debug(1, "in png_write_finish_row");  in png_write_finish_row()
2146    png_debug(1, "in png_do_write_interlace");  in png_do_write_interlace()
2333    png_debug(1, "in png_write_find_filter");  in png_write_find_filter()
2995    png_debug(1, "in png_write_filtered_row");  in png_write_filtered_row()