2 /* pngget.c - retrieval of values from info struct
4 * Last changed in libpng 1.4.1 [February 25, 2010]
5 * Copyright (c) 1998-2010 Glenn Randers-Pehrson
6 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
7 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
9 * This code is released under the libpng license.
10 * For conditions of distribution and use, see the disclaimer
11 * and license in png.h
15 #define PNG_NO_PEDANTIC_WARNINGS
17 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
21 png_get_valid(png_structp png_ptr, png_infop info_ptr, png_uint_32 flag)
23 if (png_ptr != NULL && info_ptr != NULL)
24 return(info_ptr->valid & flag);
31 png_get_rowbytes(png_structp png_ptr, png_infop info_ptr)
33 if (png_ptr != NULL && info_ptr != NULL)
34 return(info_ptr->rowbytes);
40 #ifdef PNG_INFO_IMAGE_SUPPORTED
42 png_get_rows(png_structp png_ptr, png_infop info_ptr)
44 if (png_ptr != NULL && info_ptr != NULL)
45 return(info_ptr->row_pointers);
52 #ifdef PNG_EASY_ACCESS_SUPPORTED
53 /* Easy access to info, added in libpng-0.99 */
55 png_get_image_width(png_structp png_ptr, png_infop info_ptr)
57 if (png_ptr != NULL && info_ptr != NULL)
58 return info_ptr->width;
64 png_get_image_height(png_structp png_ptr, png_infop info_ptr)
66 if (png_ptr != NULL && info_ptr != NULL)
67 return info_ptr->height;
73 png_get_bit_depth(png_structp png_ptr, png_infop info_ptr)
75 if (png_ptr != NULL && info_ptr != NULL)
76 return info_ptr->bit_depth;
82 png_get_color_type(png_structp png_ptr, png_infop info_ptr)
84 if (png_ptr != NULL && info_ptr != NULL)
85 return info_ptr->color_type;
91 png_get_filter_type(png_structp png_ptr, png_infop info_ptr)
93 if (png_ptr != NULL && info_ptr != NULL)
94 return info_ptr->filter_type;
100 png_get_interlace_type(png_structp png_ptr, png_infop info_ptr)
102 if (png_ptr != NULL && info_ptr != NULL)
103 return info_ptr->interlace_type;
109 png_get_compression_type(png_structp png_ptr, png_infop info_ptr)
111 if (png_ptr != NULL && info_ptr != NULL)
112 return info_ptr->compression_type;
118 png_get_x_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
120 if (png_ptr != NULL && info_ptr != NULL)
121 #ifdef PNG_pHYs_SUPPORTED
122 if (info_ptr->valid & PNG_INFO_pHYs)
124 png_debug1(1, "in %s retrieval function", "png_get_x_pixels_per_meter");
126 if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
130 return (info_ptr->x_pixels_per_unit);
139 png_get_y_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
141 if (png_ptr != NULL && info_ptr != NULL)
142 #ifdef PNG_pHYs_SUPPORTED
143 if (info_ptr->valid & PNG_INFO_pHYs)
145 png_debug1(1, "in %s retrieval function", "png_get_y_pixels_per_meter");
147 if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
151 return (info_ptr->y_pixels_per_unit);
160 png_get_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
162 if (png_ptr != NULL && info_ptr != NULL)
163 #ifdef PNG_pHYs_SUPPORTED
164 if (info_ptr->valid & PNG_INFO_pHYs)
166 png_debug1(1, "in %s retrieval function", "png_get_pixels_per_meter");
168 if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER ||
169 info_ptr->x_pixels_per_unit != info_ptr->y_pixels_per_unit)
173 return (info_ptr->x_pixels_per_unit);
181 #ifdef PNG_FLOATING_POINT_SUPPORTED
183 png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr)
185 if (png_ptr != NULL && info_ptr != NULL)
186 #ifdef PNG_pHYs_SUPPORTED
188 if (info_ptr->valid & PNG_INFO_pHYs)
190 png_debug1(1, "in %s retrieval function", "png_get_aspect_ratio");
192 if (info_ptr->x_pixels_per_unit == 0)
196 return ((float)((float)info_ptr->y_pixels_per_unit
197 /(float)info_ptr->x_pixels_per_unit));
207 png_get_x_offset_microns(png_structp png_ptr, png_infop info_ptr)
209 if (png_ptr != NULL && info_ptr != NULL)
210 #ifdef PNG_oFFs_SUPPORTED
212 if (info_ptr->valid & PNG_INFO_oFFs)
214 png_debug1(1, "in %s retrieval function", "png_get_x_offset_microns");
216 if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
220 return (info_ptr->x_offset);
229 png_get_y_offset_microns(png_structp png_ptr, png_infop info_ptr)
231 if (png_ptr != NULL && info_ptr != NULL)
233 #ifdef PNG_oFFs_SUPPORTED
234 if (info_ptr->valid & PNG_INFO_oFFs)
236 png_debug1(1, "in %s retrieval function", "png_get_y_offset_microns");
238 if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
242 return (info_ptr->y_offset);
251 png_get_x_offset_pixels(png_structp png_ptr, png_infop info_ptr)
253 if (png_ptr != NULL && info_ptr != NULL)
255 #ifdef PNG_oFFs_SUPPORTED
256 if (info_ptr->valid & PNG_INFO_oFFs)
258 png_debug1(1, "in %s retrieval function", "png_get_x_offset_microns");
260 if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
264 return (info_ptr->x_offset);
273 png_get_y_offset_pixels(png_structp png_ptr, png_infop info_ptr)
275 if (png_ptr != NULL && info_ptr != NULL)
277 #ifdef PNG_oFFs_SUPPORTED
278 if (info_ptr->valid & PNG_INFO_oFFs)
280 png_debug1(1, "in %s retrieval function", "png_get_y_offset_microns");
282 if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
286 return (info_ptr->y_offset);
294 #if defined(PNG_INCH_CONVERSIONS) && defined(PNG_FLOATING_POINT_SUPPORTED)
296 png_get_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
298 return ((png_uint_32)((float)png_get_pixels_per_meter(png_ptr, info_ptr)
303 png_get_x_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
305 return ((png_uint_32)((float)png_get_x_pixels_per_meter(png_ptr, info_ptr)
310 png_get_y_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
312 return ((png_uint_32)((float)png_get_y_pixels_per_meter(png_ptr, info_ptr)
317 png_get_x_offset_inches(png_structp png_ptr, png_infop info_ptr)
319 return ((float)png_get_x_offset_microns(png_ptr, info_ptr)
324 png_get_y_offset_inches(png_structp png_ptr, png_infop info_ptr)
326 return ((float)png_get_y_offset_microns(png_ptr, info_ptr)
330 #ifdef PNG_pHYs_SUPPORTED
332 png_get_pHYs_dpi(png_structp png_ptr, png_infop info_ptr,
333 png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
335 png_uint_32 retval = 0;
337 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
339 png_debug1(1, "in %s retrieval function", "pHYs");
343 *res_x = info_ptr->x_pixels_per_unit;
344 retval |= PNG_INFO_pHYs;
348 *res_y = info_ptr->y_pixels_per_unit;
349 retval |= PNG_INFO_pHYs;
351 if (unit_type != NULL)
353 *unit_type = (int)info_ptr->phys_unit_type;
354 retval |= PNG_INFO_pHYs;
357 if (res_x != NULL) *res_x = (png_uint_32)(*res_x * .0254 + .50);
358 if (res_y != NULL) *res_y = (png_uint_32)(*res_y * .0254 + .50);
364 #endif /* PNG_pHYs_SUPPORTED */
365 #endif /* PNG_INCH_CONVERSIONS && PNG_FLOATING_POINT_SUPPORTED */
367 /* png_get_channels really belongs in here, too, but it's been around longer */
369 #endif /* PNG_EASY_ACCESS_SUPPORTED */
372 png_get_channels(png_structp png_ptr, png_infop info_ptr)
374 if (png_ptr != NULL && info_ptr != NULL)
375 return(info_ptr->channels);
381 png_get_signature(png_structp png_ptr, png_infop info_ptr)
383 if (png_ptr != NULL && info_ptr != NULL)
384 return(info_ptr->signature);
389 #ifdef PNG_bKGD_SUPPORTED
391 png_get_bKGD(png_structp png_ptr, png_infop info_ptr,
392 png_color_16p *background)
394 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD)
395 && background != NULL)
397 png_debug1(1, "in %s retrieval function", "bKGD");
399 *background = &(info_ptr->background);
400 return (PNG_INFO_bKGD);
406 #ifdef PNG_cHRM_SUPPORTED
407 #ifdef PNG_FLOATING_POINT_SUPPORTED
409 png_get_cHRM(png_structp png_ptr, png_infop info_ptr,
410 double *white_x, double *white_y, double *red_x, double *red_y,
411 double *green_x, double *green_y, double *blue_x, double *blue_y)
413 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
415 png_debug1(1, "in %s retrieval function", "cHRM");
418 *white_x = (double)info_ptr->x_white;
420 *white_y = (double)info_ptr->y_white;
422 *red_x = (double)info_ptr->x_red;
424 *red_y = (double)info_ptr->y_red;
426 *green_x = (double)info_ptr->x_green;
428 *green_y = (double)info_ptr->y_green;
430 *blue_x = (double)info_ptr->x_blue;
432 *blue_y = (double)info_ptr->y_blue;
433 return (PNG_INFO_cHRM);
438 #ifdef PNG_FIXED_POINT_SUPPORTED
440 png_get_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
441 png_fixed_point *white_x, png_fixed_point *white_y, png_fixed_point *red_x,
442 png_fixed_point *red_y, png_fixed_point *green_x, png_fixed_point *green_y,
443 png_fixed_point *blue_x, png_fixed_point *blue_y)
445 png_debug1(1, "in %s retrieval function", "cHRM");
447 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
450 *white_x = info_ptr->int_x_white;
452 *white_y = info_ptr->int_y_white;
454 *red_x = info_ptr->int_x_red;
456 *red_y = info_ptr->int_y_red;
458 *green_x = info_ptr->int_x_green;
460 *green_y = info_ptr->int_y_green;
462 *blue_x = info_ptr->int_x_blue;
464 *blue_y = info_ptr->int_y_blue;
465 return (PNG_INFO_cHRM);
472 #ifdef PNG_gAMA_SUPPORTED
473 #ifdef PNG_FLOATING_POINT_SUPPORTED
475 png_get_gAMA(png_structp png_ptr, png_infop info_ptr, double *file_gamma)
477 png_debug1(1, "in %s retrieval function", "gAMA");
479 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
480 && file_gamma != NULL)
482 *file_gamma = (double)info_ptr->gamma;
483 return (PNG_INFO_gAMA);
488 #ifdef PNG_FIXED_POINT_SUPPORTED
490 png_get_gAMA_fixed(png_structp png_ptr, png_infop info_ptr,
491 png_fixed_point *int_file_gamma)
493 png_debug1(1, "in %s retrieval function", "gAMA");
495 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
496 && int_file_gamma != NULL)
498 *int_file_gamma = info_ptr->int_gamma;
499 return (PNG_INFO_gAMA);
506 #ifdef PNG_sRGB_SUPPORTED
508 png_get_sRGB(png_structp png_ptr, png_infop info_ptr, int *file_srgb_intent)
510 png_debug1(1, "in %s retrieval function", "sRGB");
512 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB)
513 && file_srgb_intent != NULL)
515 *file_srgb_intent = (int)info_ptr->srgb_intent;
516 return (PNG_INFO_sRGB);
522 #ifdef PNG_iCCP_SUPPORTED
524 png_get_iCCP(png_structp png_ptr, png_infop info_ptr,
525 png_charpp name, int *compression_type,
526 png_charpp profile, png_uint_32 *proflen)
528 png_debug1(1, "in %s retrieval function", "iCCP");
530 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP)
531 && name != NULL && profile != NULL && proflen != NULL)
533 *name = info_ptr->iccp_name;
534 *profile = info_ptr->iccp_profile;
535 /* Compression_type is a dummy so the API won't have to change
536 * if we introduce multiple compression types later.
538 *proflen = (int)info_ptr->iccp_proflen;
539 *compression_type = (int)info_ptr->iccp_compression;
540 return (PNG_INFO_iCCP);
546 #ifdef PNG_sPLT_SUPPORTED
548 png_get_sPLT(png_structp png_ptr, png_infop info_ptr,
549 png_sPLT_tpp spalettes)
551 if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL)
553 *spalettes = info_ptr->splt_palettes;
554 return ((png_uint_32)info_ptr->splt_palettes_num);
560 #ifdef PNG_hIST_SUPPORTED
562 png_get_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p *hist)
564 png_debug1(1, "in %s retrieval function", "hIST");
566 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST)
569 *hist = info_ptr->hist;
570 return (PNG_INFO_hIST);
577 png_get_IHDR(png_structp png_ptr, png_infop info_ptr,
578 png_uint_32 *width, png_uint_32 *height, int *bit_depth,
579 int *color_type, int *interlace_type, int *compression_type,
583 png_debug1(1, "in %s retrieval function", "IHDR");
585 if (png_ptr == NULL || info_ptr == NULL || width == NULL ||
586 height == NULL || bit_depth == NULL || color_type == NULL)
589 *width = info_ptr->width;
590 *height = info_ptr->height;
591 *bit_depth = info_ptr->bit_depth;
592 *color_type = info_ptr->color_type;
594 if (compression_type != NULL)
595 *compression_type = info_ptr->compression_type;
597 if (filter_type != NULL)
598 *filter_type = info_ptr->filter_type;
600 if (interlace_type != NULL)
601 *interlace_type = info_ptr->interlace_type;
603 /* This is redundant if we can be sure that the info_ptr values were all
604 * assigned in png_set_IHDR(). We do the check anyhow in case an
605 * application has ignored our advice not to mess with the members
606 * of info_ptr directly.
608 png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height,
609 info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type,
610 info_ptr->compression_type, info_ptr->filter_type);
615 #ifdef PNG_oFFs_SUPPORTED
617 png_get_oFFs(png_structp png_ptr, png_infop info_ptr,
618 png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)
620 png_debug1(1, "in %s retrieval function", "oFFs");
622 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)
623 && offset_x != NULL && offset_y != NULL && unit_type != NULL)
625 *offset_x = info_ptr->x_offset;
626 *offset_y = info_ptr->y_offset;
627 *unit_type = (int)info_ptr->offset_unit_type;
628 return (PNG_INFO_oFFs);
634 #ifdef PNG_pCAL_SUPPORTED
636 png_get_pCAL(png_structp png_ptr, png_infop info_ptr,
637 png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams,
638 png_charp *units, png_charpp *params)
640 png_debug1(1, "in %s retrieval function", "pCAL");
642 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL)
643 && purpose != NULL && X0 != NULL && X1 != NULL && type != NULL &&
644 nparams != NULL && units != NULL && params != NULL)
646 *purpose = info_ptr->pcal_purpose;
647 *X0 = info_ptr->pcal_X0;
648 *X1 = info_ptr->pcal_X1;
649 *type = (int)info_ptr->pcal_type;
650 *nparams = (int)info_ptr->pcal_nparams;
651 *units = info_ptr->pcal_units;
652 *params = info_ptr->pcal_params;
653 return (PNG_INFO_pCAL);
659 #ifdef PNG_sCAL_SUPPORTED
660 #ifdef PNG_FLOATING_POINT_SUPPORTED
662 png_get_sCAL(png_structp png_ptr, png_infop info_ptr,
663 int *unit, double *width, double *height)
665 if (png_ptr != NULL && info_ptr != NULL &&
666 (info_ptr->valid & PNG_INFO_sCAL))
668 *unit = info_ptr->scal_unit;
669 *width = info_ptr->scal_pixel_width;
670 *height = info_ptr->scal_pixel_height;
671 return (PNG_INFO_sCAL);
676 #ifdef PNG_FIXED_POINT_SUPPORTED
678 png_get_sCAL_s(png_structp png_ptr, png_infop info_ptr,
679 int *unit, png_charpp width, png_charpp height)
681 if (png_ptr != NULL && info_ptr != NULL &&
682 (info_ptr->valid & PNG_INFO_sCAL))
684 *unit = info_ptr->scal_unit;
685 *width = info_ptr->scal_s_width;
686 *height = info_ptr->scal_s_height;
687 return (PNG_INFO_sCAL);
695 #ifdef PNG_pHYs_SUPPORTED
697 png_get_pHYs(png_structp png_ptr, png_infop info_ptr,
698 png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
700 png_uint_32 retval = 0;
702 png_debug1(1, "in %s retrieval function", "pHYs");
704 if (png_ptr != NULL && info_ptr != NULL &&
705 (info_ptr->valid & PNG_INFO_pHYs))
709 *res_x = info_ptr->x_pixels_per_unit;
710 retval |= PNG_INFO_pHYs;
715 *res_y = info_ptr->y_pixels_per_unit;
716 retval |= PNG_INFO_pHYs;
719 if (unit_type != NULL)
721 *unit_type = (int)info_ptr->phys_unit_type;
722 retval |= PNG_INFO_pHYs;
730 png_get_PLTE(png_structp png_ptr, png_infop info_ptr, png_colorp *palette,
733 png_debug1(1, "in %s retrieval function", "PLTE");
735 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_PLTE)
738 *palette = info_ptr->palette;
739 *num_palette = info_ptr->num_palette;
740 png_debug1(3, "num_palette = %d", *num_palette);
741 return (PNG_INFO_PLTE);
746 #ifdef PNG_sBIT_SUPPORTED
748 png_get_sBIT(png_structp png_ptr, png_infop info_ptr, png_color_8p *sig_bit)
750 png_debug1(1, "in %s retrieval function", "sBIT");
752 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT)
755 *sig_bit = &(info_ptr->sig_bit);
756 return (PNG_INFO_sBIT);
762 #ifdef PNG_TEXT_SUPPORTED
764 png_get_text(png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr,
767 if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0)
769 png_debug1(1, "in %s retrieval function",
770 (png_ptr->chunk_name[0] == '\0' ? "text"
771 : (png_const_charp)png_ptr->chunk_name));
773 if (text_ptr != NULL)
774 *text_ptr = info_ptr->text;
776 if (num_text != NULL)
777 *num_text = info_ptr->num_text;
779 return ((png_uint_32)info_ptr->num_text);
781 if (num_text != NULL)
787 #ifdef PNG_tIME_SUPPORTED
789 png_get_tIME(png_structp png_ptr, png_infop info_ptr, png_timep *mod_time)
791 png_debug1(1, "in %s retrieval function", "tIME");
793 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME)
796 *mod_time = &(info_ptr->mod_time);
797 return (PNG_INFO_tIME);
803 #ifdef PNG_tRNS_SUPPORTED
805 png_get_tRNS(png_structp png_ptr, png_infop info_ptr,
806 png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color)
808 png_uint_32 retval = 0;
809 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS))
811 png_debug1(1, "in %s retrieval function", "tRNS");
813 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
815 if (trans_alpha != NULL)
817 *trans_alpha = info_ptr->trans_alpha;
818 retval |= PNG_INFO_tRNS;
821 if (trans_color != NULL)
822 *trans_color = &(info_ptr->trans_color);
824 else /* if (info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) */
826 if (trans_color != NULL)
828 *trans_color = &(info_ptr->trans_color);
829 retval |= PNG_INFO_tRNS;
832 if (trans_alpha != NULL)
835 if (num_trans != NULL)
837 *num_trans = info_ptr->num_trans;
838 retval |= PNG_INFO_tRNS;
845 #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
847 png_get_unknown_chunks(png_structp png_ptr, png_infop info_ptr,
848 png_unknown_chunkpp unknowns)
850 if (png_ptr != NULL && info_ptr != NULL && unknowns != NULL)
852 *unknowns = info_ptr->unknown_chunks;
853 return ((png_uint_32)info_ptr->unknown_chunks_num);
859 #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
861 png_get_rgb_to_gray_status (png_structp png_ptr)
863 return (png_byte)(png_ptr? png_ptr->rgb_to_gray_status : 0);
867 #ifdef PNG_USER_CHUNKS_SUPPORTED
869 png_get_user_chunk_ptr(png_structp png_ptr)
871 return (png_ptr? png_ptr->user_chunk_ptr : NULL);
876 png_get_compression_buffer_size(png_structp png_ptr)
878 return (png_ptr ? png_ptr->zbuf_size : 0L);
882 #ifdef PNG_SET_USER_LIMITS_SUPPORTED
883 /* These functions were added to libpng 1.2.6 and were enabled
884 * by default in libpng-1.4.0 */
886 png_get_user_width_max (png_structp png_ptr)
888 return (png_ptr? png_ptr->user_width_max : 0);
891 png_get_user_height_max (png_structp png_ptr)
893 return (png_ptr? png_ptr->user_height_max : 0);
895 /* This function was added to libpng 1.4.0 */
897 png_get_chunk_cache_max (png_structp png_ptr)
899 return (png_ptr? png_ptr->user_chunk_cache_max : 0);
901 /* This function was added to libpng 1.4.1 */
902 png_alloc_size_t PNGAPI
903 png_get_chunk_malloc_max (png_structp png_ptr)
906 png_ptr->user_chunk_malloc_max : 0);
908 #endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
910 /* These functions were added to libpng 1.4.0 */
911 #ifdef PNG_IO_STATE_SUPPORTED
913 png_get_io_state (png_structp png_ptr)
915 return png_ptr->io_state;
919 png_get_io_chunk_name (png_structp png_ptr)
921 return png_ptr->chunk_name;
923 #endif /* ?PNG_IO_STATE_SUPPORTED */
925 #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */