105 int readpng2_init(mainprog_info *mainprog_ptr)  in readpng2_init()  argument
113     png_ptr = png_create_read_struct(png_get_libpng_ver(NULL), mainprog_ptr,  in readpng2_init()
135     if (setjmp(mainprog_ptr->jmpbuf)) {  in readpng2_init()
170     png_set_progressive_read_fn(png_ptr, mainprog_ptr,  in readpng2_init()
176     mainprog_ptr->png_ptr = png_ptr;  in readpng2_init()
177     mainprog_ptr->info_ptr = info_ptr;  in readpng2_init()
190 int readpng2_decode_data(mainprog_info *mainprog_ptr, uch *rawbuf, ulg length)  in readpng2_decode_data()  argument
192     png_structp png_ptr = (png_structp)mainprog_ptr->png_ptr;  in readpng2_decode_data()
193     png_infop info_ptr = (png_infop)mainprog_ptr->info_ptr;  in readpng2_decode_data()
199     if (setjmp(mainprog_ptr->jmpbuf)) {  in readpng2_decode_data()
201         mainprog_ptr->png_ptr = NULL;  in readpng2_decode_data()
202         mainprog_ptr->info_ptr = NULL;  in readpng2_decode_data()
219     mainprog_info  *mainprog_ptr;  in readpng2_info_callback()  local
242     mainprog_ptr = png_get_progressive_ptr(png_ptr);  in readpng2_info_callback()
244     if (mainprog_ptr == NULL) {         /* we be hosed */  in readpng2_info_callback()
263     mainprog_ptr->width = (ulg)width;  in readpng2_info_callback()
264     mainprog_ptr->height = (ulg)height;  in readpng2_info_callback()
270     if (mainprog_ptr->need_bgcolor)  in readpng2_info_callback()
284                mainprog_ptr->bg_red   = pBackground->red   >> 8;  in readpng2_info_callback()
285                mainprog_ptr->bg_green = pBackground->green >> 8;  in readpng2_info_callback()
286                mainprog_ptr->bg_blue  = pBackground->blue  >> 8;  in readpng2_info_callback()
289                    mainprog_ptr->bg_red = mainprog_ptr->bg_green =  in readpng2_info_callback()
290                      mainprog_ptr->bg_blue = pBackground->gray? 255 : 0;  in readpng2_info_callback()
292                    mainprog_ptr->bg_red = mainprog_ptr->bg_green =  in readpng2_info_callback()
293                      mainprog_ptr->bg_blue = (255/3) * pBackground->gray;  in readpng2_info_callback()
295                    mainprog_ptr->bg_red = mainprog_ptr->bg_green =  in readpng2_info_callback()
296                      mainprog_ptr->bg_blue = (255/15) * pBackground->gray;  in readpng2_info_callback()
298                mainprog_ptr->bg_red   = (uch)pBackground->red;  in readpng2_info_callback()
299                mainprog_ptr->bg_green = (uch)pBackground->green;  in readpng2_info_callback()
300                mainprog_ptr->bg_blue  = (uch)pBackground->blue;  in readpng2_info_callback()
347         png_set_gamma(png_ptr, mainprog_ptr->display_exponent, gamma);  in readpng2_info_callback()
349         png_set_gamma(png_ptr, mainprog_ptr->display_exponent, 0.45455);  in readpng2_info_callback()
353             (png_fixed_point)(100000*mainprog_ptr->display_exponent+.5), gamma);  in readpng2_info_callback()
356             (png_fixed_point)(100000*mainprog_ptr->display_exponent+.5), 45455);  in readpng2_info_callback()
361     mainprog_ptr->passes = png_set_interlace_handling(png_ptr);  in readpng2_info_callback()
369     mainprog_ptr->rowbytes = (int)png_get_rowbytes(png_ptr, info_ptr);  in readpng2_info_callback()
370     mainprog_ptr->channels = png_get_channels(png_ptr, info_ptr);  in readpng2_info_callback()
378     (*mainprog_ptr->mainprog_init)();  in readpng2_info_callback()
393     mainprog_info  *mainprog_ptr;  in readpng2_row_callback()  local
406     mainprog_ptr = png_get_progressive_ptr(png_ptr);  in readpng2_row_callback()
411     mainprog_ptr->pass = pass;  in readpng2_row_callback()
418     png_progressive_combine_row(png_ptr, mainprog_ptr->row_pointers[row_num],  in readpng2_row_callback()
425     (*mainprog_ptr->mainprog_display_row)(row_num);  in readpng2_row_callback()
439     mainprog_info  *mainprog_ptr;  in readpng2_end_callback()  local
444     mainprog_ptr = png_get_progressive_ptr(png_ptr);  in readpng2_end_callback()
454     (*mainprog_ptr->mainprog_finish_display)();  in readpng2_end_callback()
468 void readpng2_cleanup(mainprog_info *mainprog_ptr)  in readpng2_cleanup()  argument
470     png_structp png_ptr = (png_structp)mainprog_ptr->png_ptr;  in readpng2_cleanup()
471     png_infop info_ptr = (png_infop)mainprog_ptr->info_ptr;  in readpng2_cleanup()
476     mainprog_ptr->png_ptr = NULL;  in readpng2_cleanup()
477     mainprog_ptr->info_ptr = NULL;  in readpng2_cleanup()
491     mainprog_info  *mainprog_ptr;  in readpng2_error_handler()  local
505     mainprog_ptr = png_get_error_ptr(png_ptr);  in readpng2_error_handler()
506     if (mainprog_ptr == NULL) {         /* we are completely hosed now */  in readpng2_error_handler()
520     longjmp(mainprog_ptr->jmpbuf, 1);  in readpng2_error_handler()