170 int readpng2_init(mainprog_info *mainprog_ptr)  in readpng2_init()  argument
178     png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, mainprog_ptr,  in readpng2_init()
200     if (setjmp(mainprog_ptr->jmpbuf)) {  in readpng2_init()
241     png_set_progressive_read_fn(png_ptr, mainprog_ptr,  in readpng2_init()
276         if (mainprog_ptr->nommxfilters)  in readpng2_init()
281         if (mainprog_ptr->nommxcombine)  in readpng2_init()
283         if (mainprog_ptr->nommxinterlace)  in readpng2_init()
337     mainprog_ptr->png_ptr = png_ptr;  in readpng2_init()
338     mainprog_ptr->info_ptr = info_ptr;  in readpng2_init()
351 int readpng2_decode_data(mainprog_info *mainprog_ptr, uch *rawbuf, ulg length)  in readpng2_decode_data()  argument
353     png_structp png_ptr = (png_structp)mainprog_ptr->png_ptr;  in readpng2_decode_data()
354     png_infop info_ptr = (png_infop)mainprog_ptr->info_ptr;  in readpng2_decode_data()
360     if (setjmp(mainprog_ptr->jmpbuf)) {  in readpng2_decode_data()
362         mainprog_ptr->png_ptr = NULL;  in readpng2_decode_data()
363         mainprog_ptr->info_ptr = NULL;  in readpng2_decode_data()
380     mainprog_info  *mainprog_ptr;  in readpng2_info_callback()  local
399     mainprog_ptr = png_get_progressive_ptr(png_ptr);  in readpng2_info_callback()
401     if (mainprog_ptr == NULL) {         /* we be hosed */  in readpng2_info_callback()
420     mainprog_ptr->width = (ulg)width;  in readpng2_info_callback()
421     mainprog_ptr->height = (ulg)height;  in readpng2_info_callback()
427     if (mainprog_ptr->need_bgcolor &&  in readpng2_info_callback()
440             mainprog_ptr->bg_red   = pBackground->red   >> 8;  in readpng2_info_callback()
441             mainprog_ptr->bg_green = pBackground->green >> 8;  in readpng2_info_callback()
442             mainprog_ptr->bg_blue  = pBackground->blue  >> 8;  in readpng2_info_callback()
445                 mainprog_ptr->bg_red = mainprog_ptr->bg_green =  in readpng2_info_callback()
446                   mainprog_ptr->bg_blue = pBackground->gray? 255 : 0;  in readpng2_info_callback()
448                 mainprog_ptr->bg_red = mainprog_ptr->bg_green =  in readpng2_info_callback()
449                   mainprog_ptr->bg_blue = (255/3) * pBackground->gray;  in readpng2_info_callback()
451                 mainprog_ptr->bg_red = mainprog_ptr->bg_green =  in readpng2_info_callback()
452                   mainprog_ptr->bg_blue = (255/15) * pBackground->gray;  in readpng2_info_callback()
454             mainprog_ptr->bg_red   = (uch)pBackground->red;  in readpng2_info_callback()
455             mainprog_ptr->bg_green = (uch)pBackground->green;  in readpng2_info_callback()
456             mainprog_ptr->bg_blue  = (uch)pBackground->blue;  in readpng2_info_callback()
495         png_set_gamma(png_ptr, mainprog_ptr->display_exponent, gamma);  in readpng2_info_callback()
497         png_set_gamma(png_ptr, mainprog_ptr->display_exponent, 0.45455);  in readpng2_info_callback()
502     mainprog_ptr->passes = png_set_interlace_handling(png_ptr);  in readpng2_info_callback()
510     mainprog_ptr->rowbytes = (int)png_get_rowbytes(png_ptr, info_ptr);  in readpng2_info_callback()
511     mainprog_ptr->channels = png_get_channels(png_ptr, info_ptr);  in readpng2_info_callback()
519     (*mainprog_ptr->mainprog_init)();  in readpng2_info_callback()
534     mainprog_info  *mainprog_ptr;  in readpng2_row_callback()  local
547     mainprog_ptr = png_get_progressive_ptr(png_ptr);  in readpng2_row_callback()
552     mainprog_ptr->pass = pass;  in readpng2_row_callback()
559     png_progressive_combine_row(png_ptr, mainprog_ptr->row_pointers[row_num],  in readpng2_row_callback()
566     (*mainprog_ptr->mainprog_display_row)(row_num);  in readpng2_row_callback()
580     mainprog_info  *mainprog_ptr;  in readpng2_end_callback()  local
585     mainprog_ptr = png_get_progressive_ptr(png_ptr);  in readpng2_end_callback()
595     (*mainprog_ptr->mainprog_finish_display)();  in readpng2_end_callback()
607 void readpng2_cleanup(mainprog_info *mainprog_ptr)  in readpng2_cleanup()  argument
609     png_structp png_ptr = (png_structp)mainprog_ptr->png_ptr;  in readpng2_cleanup()
610     png_infop info_ptr = (png_infop)mainprog_ptr->info_ptr;  in readpng2_cleanup()
615     mainprog_ptr->png_ptr = NULL;  in readpng2_cleanup()
616     mainprog_ptr->info_ptr = NULL;  in readpng2_cleanup()
625     mainprog_info  *mainprog_ptr;  in readpng2_error_handler()  local
639     mainprog_ptr = png_get_error_ptr(png_ptr);  in readpng2_error_handler()
640     if (mainprog_ptr == NULL) {         /* we are completely hosed now */  in readpng2_error_handler()
647     longjmp(mainprog_ptr->jmpbuf, 1);  in readpng2_error_handler()