2 /* pngget.c - retrieval of values from info struct
4 * Last changed in libpng 1.2.30 [August 15, 2008]
5 * For conditions of distribution and use, see copyright notice in png.h
6 * Copyright (c) 1998-2008 Glenn Randers-Pehrson
7 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
8 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
13 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
16 png_get_valid(png_structp png_ptr, png_infop info_ptr, png_uint_32 flag)
18 if (png_ptr != NULL && info_ptr != NULL)
19 return(info_ptr->valid & flag);
25 png_get_rowbytes(png_structp png_ptr, png_infop info_ptr)
27 if (png_ptr != NULL && info_ptr != NULL)
28 return(info_ptr->rowbytes);
33 #if defined(PNG_INFO_IMAGE_SUPPORTED)
35 png_get_rows(png_structp png_ptr, png_infop info_ptr)
37 if (png_ptr != NULL && info_ptr != NULL)
38 return(info_ptr->row_pointers);
44 #ifdef PNG_EASY_ACCESS_SUPPORTED
45 /* easy access to info, added in libpng-0.99 */
47 png_get_image_width(png_structp png_ptr, png_infop info_ptr)
49 if (png_ptr != NULL && info_ptr != NULL)
51 return info_ptr->width;
57 png_get_image_height(png_structp png_ptr, png_infop info_ptr)
59 if (png_ptr != NULL && info_ptr != NULL)
61 return info_ptr->height;
67 png_get_bit_depth(png_structp png_ptr, png_infop info_ptr)
69 if (png_ptr != NULL && info_ptr != NULL)
71 return info_ptr->bit_depth;
77 png_get_color_type(png_structp png_ptr, png_infop info_ptr)
79 if (png_ptr != NULL && info_ptr != NULL)
81 return info_ptr->color_type;
87 png_get_filter_type(png_structp png_ptr, png_infop info_ptr)
89 if (png_ptr != NULL && info_ptr != NULL)
91 return info_ptr->filter_type;
97 png_get_interlace_type(png_structp png_ptr, png_infop info_ptr)
99 if (png_ptr != NULL && info_ptr != NULL)
101 return info_ptr->interlace_type;
107 png_get_compression_type(png_structp png_ptr, png_infop info_ptr)
109 if (png_ptr != NULL && info_ptr != NULL)
111 return info_ptr->compression_type;
117 png_get_x_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
119 if (png_ptr != NULL && info_ptr != NULL)
120 #if defined(PNG_pHYs_SUPPORTED)
121 if (info_ptr->valid & PNG_INFO_pHYs)
123 png_debug1(1, "in %s retrieval function\n", "png_get_x_pixels_per_meter");
124 if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
126 else return (info_ptr->x_pixels_per_unit);
135 png_get_y_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
137 if (png_ptr != NULL && info_ptr != NULL)
138 #if defined(PNG_pHYs_SUPPORTED)
139 if (info_ptr->valid & PNG_INFO_pHYs)
141 png_debug1(1, "in %s retrieval function\n", "png_get_y_pixels_per_meter");
142 if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
144 else return (info_ptr->y_pixels_per_unit);
153 png_get_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
155 if (png_ptr != NULL && info_ptr != NULL)
156 #if defined(PNG_pHYs_SUPPORTED)
157 if (info_ptr->valid & PNG_INFO_pHYs)
159 png_debug1(1, "in %s retrieval function\n", "png_get_pixels_per_meter");
160 if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER ||
161 info_ptr->x_pixels_per_unit != info_ptr->y_pixels_per_unit)
163 else return (info_ptr->x_pixels_per_unit);
171 #ifdef PNG_FLOATING_POINT_SUPPORTED
173 png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr)
175 if (png_ptr != NULL && info_ptr != NULL)
176 #if defined(PNG_pHYs_SUPPORTED)
177 if (info_ptr->valid & PNG_INFO_pHYs)
179 png_debug1(1, "in %s retrieval function\n", "png_get_aspect_ratio");
180 if (info_ptr->x_pixels_per_unit == 0)
183 return ((float)((float)info_ptr->y_pixels_per_unit
184 /(float)info_ptr->x_pixels_per_unit));
194 png_get_x_offset_microns(png_structp png_ptr, png_infop info_ptr)
196 if (png_ptr != NULL && info_ptr != NULL)
197 #if defined(PNG_oFFs_SUPPORTED)
198 if (info_ptr->valid & PNG_INFO_oFFs)
200 png_debug1(1, "in %s retrieval function\n", "png_get_x_offset_microns");
201 if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
203 else return (info_ptr->x_offset);
212 png_get_y_offset_microns(png_structp png_ptr, png_infop info_ptr)
214 if (png_ptr != NULL && info_ptr != NULL)
215 #if defined(PNG_oFFs_SUPPORTED)
216 if (info_ptr->valid & PNG_INFO_oFFs)
218 png_debug1(1, "in %s retrieval function\n", "png_get_y_offset_microns");
219 if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
221 else return (info_ptr->y_offset);
230 png_get_x_offset_pixels(png_structp png_ptr, png_infop info_ptr)
232 if (png_ptr != NULL && info_ptr != NULL)
233 #if defined(PNG_oFFs_SUPPORTED)
234 if (info_ptr->valid & PNG_INFO_oFFs)
236 png_debug1(1, "in %s retrieval function\n", "png_get_x_offset_microns");
237 if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
239 else return (info_ptr->x_offset);
248 png_get_y_offset_pixels(png_structp png_ptr, png_infop info_ptr)
250 if (png_ptr != NULL && info_ptr != NULL)
251 #if defined(PNG_oFFs_SUPPORTED)
252 if (info_ptr->valid & PNG_INFO_oFFs)
254 png_debug1(1, "in %s retrieval function\n", "png_get_y_offset_microns");
255 if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
257 else return (info_ptr->y_offset);
265 #if defined(PNG_INCH_CONVERSIONS) && defined(PNG_FLOATING_POINT_SUPPORTED)
267 png_get_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
269 return ((png_uint_32)((float)png_get_pixels_per_meter(png_ptr, info_ptr)
274 png_get_x_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
276 return ((png_uint_32)((float)png_get_x_pixels_per_meter(png_ptr, info_ptr)
281 png_get_y_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
283 return ((png_uint_32)((float)png_get_y_pixels_per_meter(png_ptr, info_ptr)
288 png_get_x_offset_inches(png_structp png_ptr, png_infop info_ptr)
290 return ((float)png_get_x_offset_microns(png_ptr, info_ptr)
295 png_get_y_offset_inches(png_structp png_ptr, png_infop info_ptr)
297 return ((float)png_get_y_offset_microns(png_ptr, info_ptr)
301 #if defined(PNG_pHYs_SUPPORTED)
303 png_get_pHYs_dpi(png_structp png_ptr, png_infop info_ptr,
304 png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
306 png_uint_32 retval = 0;
308 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
310 png_debug1(1, "in %s retrieval function\n", "pHYs");
313 *res_x = info_ptr->x_pixels_per_unit;
314 retval |= PNG_INFO_pHYs;
318 *res_y = info_ptr->y_pixels_per_unit;
319 retval |= PNG_INFO_pHYs;
321 if (unit_type != NULL)
323 *unit_type = (int)info_ptr->phys_unit_type;
324 retval |= PNG_INFO_pHYs;
327 if (res_x != NULL) *res_x = (png_uint_32)(*res_x * .0254 + .50);
328 if (res_y != NULL) *res_y = (png_uint_32)(*res_y * .0254 + .50);
334 #endif /* PNG_pHYs_SUPPORTED */
335 #endif /* PNG_INCH_CONVERSIONS && PNG_FLOATING_POINT_SUPPORTED */
337 /* png_get_channels really belongs in here, too, but it's been around longer */
339 #endif /* PNG_EASY_ACCESS_SUPPORTED */
342 png_get_channels(png_structp png_ptr, png_infop info_ptr)
344 if (png_ptr != NULL && info_ptr != NULL)
345 return(info_ptr->channels);
351 png_get_signature(png_structp png_ptr, png_infop info_ptr)
353 if (png_ptr != NULL && info_ptr != NULL)
354 return(info_ptr->signature);
359 #if defined(PNG_bKGD_SUPPORTED)
361 png_get_bKGD(png_structp png_ptr, png_infop info_ptr,
362 png_color_16p *background)
364 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD)
365 && background != NULL)
367 png_debug1(1, "in %s retrieval function\n", "bKGD");
368 *background = &(info_ptr->background);
369 return (PNG_INFO_bKGD);
375 #if defined(PNG_cHRM_SUPPORTED)
376 #ifdef PNG_FLOATING_POINT_SUPPORTED
378 png_get_cHRM(png_structp png_ptr, png_infop info_ptr,
379 double *white_x, double *white_y, double *red_x, double *red_y,
380 double *green_x, double *green_y, double *blue_x, double *blue_y)
382 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
384 png_debug1(1, "in %s retrieval function\n", "cHRM");
386 *white_x = (double)info_ptr->x_white;
388 *white_y = (double)info_ptr->y_white;
390 *red_x = (double)info_ptr->x_red;
392 *red_y = (double)info_ptr->y_red;
394 *green_x = (double)info_ptr->x_green;
396 *green_y = (double)info_ptr->y_green;
398 *blue_x = (double)info_ptr->x_blue;
400 *blue_y = (double)info_ptr->y_blue;
401 return (PNG_INFO_cHRM);
406 #ifdef PNG_FIXED_POINT_SUPPORTED
408 png_get_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
409 png_fixed_point *white_x, png_fixed_point *white_y, png_fixed_point *red_x,
410 png_fixed_point *red_y, png_fixed_point *green_x, png_fixed_point *green_y,
411 png_fixed_point *blue_x, png_fixed_point *blue_y)
413 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
415 png_debug1(1, "in %s retrieval function\n", "cHRM");
417 *white_x = info_ptr->int_x_white;
419 *white_y = info_ptr->int_y_white;
421 *red_x = info_ptr->int_x_red;
423 *red_y = info_ptr->int_y_red;
425 *green_x = info_ptr->int_x_green;
427 *green_y = info_ptr->int_y_green;
429 *blue_x = info_ptr->int_x_blue;
431 *blue_y = info_ptr->int_y_blue;
432 return (PNG_INFO_cHRM);
439 #if defined(PNG_gAMA_SUPPORTED)
440 #ifdef PNG_FLOATING_POINT_SUPPORTED
442 png_get_gAMA(png_structp png_ptr, png_infop info_ptr, double *file_gamma)
444 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
445 && file_gamma != NULL)
447 png_debug1(1, "in %s retrieval function\n", "gAMA");
448 *file_gamma = (double)info_ptr->gamma;
449 return (PNG_INFO_gAMA);
454 #ifdef PNG_FIXED_POINT_SUPPORTED
456 png_get_gAMA_fixed(png_structp png_ptr, png_infop info_ptr,
457 png_fixed_point *int_file_gamma)
459 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
460 && int_file_gamma != NULL)
462 png_debug1(1, "in %s retrieval function\n", "gAMA");
463 *int_file_gamma = info_ptr->int_gamma;
464 return (PNG_INFO_gAMA);
471 #if defined(PNG_sRGB_SUPPORTED)
473 png_get_sRGB(png_structp png_ptr, png_infop info_ptr, int *file_srgb_intent)
475 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB)
476 && file_srgb_intent != NULL)
478 png_debug1(1, "in %s retrieval function\n", "sRGB");
479 *file_srgb_intent = (int)info_ptr->srgb_intent;
480 return (PNG_INFO_sRGB);
486 #if defined(PNG_iCCP_SUPPORTED)
488 png_get_iCCP(png_structp png_ptr, png_infop info_ptr,
489 png_charpp name, int *compression_type,
490 png_charpp profile, png_uint_32 *proflen)
492 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP)
493 && name != NULL && profile != NULL && proflen != NULL)
495 png_debug1(1, "in %s retrieval function\n", "iCCP");
496 *name = info_ptr->iccp_name;
497 *profile = info_ptr->iccp_profile;
498 /* compression_type is a dummy so the API won't have to change
499 if we introduce multiple compression types later. */
500 *proflen = (int)info_ptr->iccp_proflen;
501 *compression_type = (int)info_ptr->iccp_compression;
502 return (PNG_INFO_iCCP);
508 #if defined(PNG_sPLT_SUPPORTED)
510 png_get_sPLT(png_structp png_ptr, png_infop info_ptr,
511 png_sPLT_tpp spalettes)
513 if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL)
515 *spalettes = info_ptr->splt_palettes;
516 return ((png_uint_32)info_ptr->splt_palettes_num);
522 #if defined(PNG_hIST_SUPPORTED)
524 png_get_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p *hist)
526 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST)
529 png_debug1(1, "in %s retrieval function\n", "hIST");
530 *hist = info_ptr->hist;
531 return (PNG_INFO_hIST);
538 png_get_IHDR(png_structp png_ptr, png_infop info_ptr,
539 png_uint_32 *width, png_uint_32 *height, int *bit_depth,
540 int *color_type, int *interlace_type, int *compression_type,
544 if (png_ptr != NULL && info_ptr != NULL && width != NULL && height != NULL &&
545 bit_depth != NULL && color_type != NULL)
547 png_debug1(1, "in %s retrieval function\n", "IHDR");
548 *width = info_ptr->width;
549 *height = info_ptr->height;
550 *bit_depth = info_ptr->bit_depth;
551 if (info_ptr->bit_depth < 1 || info_ptr->bit_depth > 16)
552 png_error(png_ptr, "Invalid bit depth");
553 *color_type = info_ptr->color_type;
554 if (info_ptr->color_type > 6)
555 png_error(png_ptr, "Invalid color type");
556 if (compression_type != NULL)
557 *compression_type = info_ptr->compression_type;
558 if (filter_type != NULL)
559 *filter_type = info_ptr->filter_type;
560 if (interlace_type != NULL)
561 *interlace_type = info_ptr->interlace_type;
563 /* check for potential overflow of rowbytes */
564 if (*width == 0 || *width > PNG_UINT_31_MAX)
565 png_error(png_ptr, "Invalid image width");
566 if (*height == 0 || *height > PNG_UINT_31_MAX)
567 png_error(png_ptr, "Invalid image height");
568 if (info_ptr->width > (PNG_UINT_32_MAX
569 >> 3) /* 8-byte RGBA pixels */
570 - 64 /* bigrowbuf hack */
571 - 1 /* filter byte */
572 - 7*8 /* rounding of width to multiple of 8 pixels */
573 - 8) /* extra max_pixel_depth pad */
576 "Width too large for libpng to process image data.");
583 #if defined(PNG_oFFs_SUPPORTED)
585 png_get_oFFs(png_structp png_ptr, png_infop info_ptr,
586 png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)
588 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)
589 && offset_x != NULL && offset_y != NULL && unit_type != NULL)
591 png_debug1(1, "in %s retrieval function\n", "oFFs");
592 *offset_x = info_ptr->x_offset;
593 *offset_y = info_ptr->y_offset;
594 *unit_type = (int)info_ptr->offset_unit_type;
595 return (PNG_INFO_oFFs);
601 #if defined(PNG_pCAL_SUPPORTED)
603 png_get_pCAL(png_structp png_ptr, png_infop info_ptr,
604 png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams,
605 png_charp *units, png_charpp *params)
607 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL)
608 && purpose != NULL && X0 != NULL && X1 != NULL && type != NULL &&
609 nparams != NULL && units != NULL && params != NULL)
611 png_debug1(1, "in %s retrieval function\n", "pCAL");
612 *purpose = info_ptr->pcal_purpose;
613 *X0 = info_ptr->pcal_X0;
614 *X1 = info_ptr->pcal_X1;
615 *type = (int)info_ptr->pcal_type;
616 *nparams = (int)info_ptr->pcal_nparams;
617 *units = info_ptr->pcal_units;
618 *params = info_ptr->pcal_params;
619 return (PNG_INFO_pCAL);
625 #if defined(PNG_sCAL_SUPPORTED)
626 #ifdef PNG_FLOATING_POINT_SUPPORTED
628 png_get_sCAL(png_structp png_ptr, png_infop info_ptr,
629 int *unit, double *width, double *height)
631 if (png_ptr != NULL && info_ptr != NULL &&
632 (info_ptr->valid & PNG_INFO_sCAL))
634 *unit = info_ptr->scal_unit;
635 *width = info_ptr->scal_pixel_width;
636 *height = info_ptr->scal_pixel_height;
637 return (PNG_INFO_sCAL);
642 #ifdef PNG_FIXED_POINT_SUPPORTED
644 png_get_sCAL_s(png_structp png_ptr, png_infop info_ptr,
645 int *unit, png_charpp width, png_charpp height)
647 if (png_ptr != NULL && info_ptr != NULL &&
648 (info_ptr->valid & PNG_INFO_sCAL))
650 *unit = info_ptr->scal_unit;
651 *width = info_ptr->scal_s_width;
652 *height = info_ptr->scal_s_height;
653 return (PNG_INFO_sCAL);
661 #if defined(PNG_pHYs_SUPPORTED)
663 png_get_pHYs(png_structp png_ptr, png_infop info_ptr,
664 png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
666 png_uint_32 retval = 0;
668 if (png_ptr != NULL && info_ptr != NULL &&
669 (info_ptr->valid & PNG_INFO_pHYs))
671 png_debug1(1, "in %s retrieval function\n", "pHYs");
674 *res_x = info_ptr->x_pixels_per_unit;
675 retval |= PNG_INFO_pHYs;
679 *res_y = info_ptr->y_pixels_per_unit;
680 retval |= PNG_INFO_pHYs;
682 if (unit_type != NULL)
684 *unit_type = (int)info_ptr->phys_unit_type;
685 retval |= PNG_INFO_pHYs;
693 png_get_PLTE(png_structp png_ptr, png_infop info_ptr, png_colorp *palette,
696 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_PLTE)
699 png_debug1(1, "in %s retrieval function\n", "PLTE");
700 *palette = info_ptr->palette;
701 *num_palette = info_ptr->num_palette;
702 png_debug1(3, "num_palette = %d\n", *num_palette);
703 return (PNG_INFO_PLTE);
708 #if defined(PNG_sBIT_SUPPORTED)
710 png_get_sBIT(png_structp png_ptr, png_infop info_ptr, png_color_8p *sig_bit)
712 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT)
715 png_debug1(1, "in %s retrieval function\n", "sBIT");
716 *sig_bit = &(info_ptr->sig_bit);
717 return (PNG_INFO_sBIT);
723 #if defined(PNG_TEXT_SUPPORTED)
725 png_get_text(png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr,
728 if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0)
730 png_debug1(1, "in %s retrieval function\n",
731 (png_ptr->chunk_name[0] == '\0' ? "text"
732 : (png_const_charp)png_ptr->chunk_name));
733 if (text_ptr != NULL)
734 *text_ptr = info_ptr->text;
735 if (num_text != NULL)
736 *num_text = info_ptr->num_text;
737 return ((png_uint_32)info_ptr->num_text);
739 if (num_text != NULL)
745 #if defined(PNG_tIME_SUPPORTED)
747 png_get_tIME(png_structp png_ptr, png_infop info_ptr, png_timep *mod_time)
749 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME)
752 png_debug1(1, "in %s retrieval function\n", "tIME");
753 *mod_time = &(info_ptr->mod_time);
754 return (PNG_INFO_tIME);
760 #if defined(PNG_tRNS_SUPPORTED)
762 png_get_tRNS(png_structp png_ptr, png_infop info_ptr,
763 png_bytep *trans, int *num_trans, png_color_16p *trans_values)
765 png_uint_32 retval = 0;
766 if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS))
768 png_debug1(1, "in %s retrieval function\n", "tRNS");
769 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
773 *trans = info_ptr->trans;
774 retval |= PNG_INFO_tRNS;
776 if (trans_values != NULL)
777 *trans_values = &(info_ptr->trans_values);
779 else /* if (info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) */
781 if (trans_values != NULL)
783 *trans_values = &(info_ptr->trans_values);
784 retval |= PNG_INFO_tRNS;
789 if (num_trans != NULL)
791 *num_trans = info_ptr->num_trans;
792 retval |= PNG_INFO_tRNS;
799 #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
801 png_get_unknown_chunks(png_structp png_ptr, png_infop info_ptr,
802 png_unknown_chunkpp unknowns)
804 if (png_ptr != NULL && info_ptr != NULL && unknowns != NULL)
806 *unknowns = info_ptr->unknown_chunks;
807 return ((png_uint_32)info_ptr->unknown_chunks_num);
813 #if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
815 png_get_rgb_to_gray_status (png_structp png_ptr)
817 return (png_byte)(png_ptr? png_ptr->rgb_to_gray_status : 0);
821 #if defined(PNG_USER_CHUNKS_SUPPORTED)
823 png_get_user_chunk_ptr(png_structp png_ptr)
825 return (png_ptr? png_ptr->user_chunk_ptr : NULL);
829 #ifdef PNG_WRITE_SUPPORTED
831 png_get_compression_buffer_size(png_structp png_ptr)
833 return (png_uint_32)(png_ptr? png_ptr->zbuf_size : 0L);
837 #ifdef PNG_ASSEMBLER_CODE_SUPPORTED
839 /* this function was added to libpng 1.2.0 and should exist by default */
841 png_get_asm_flags (png_structp png_ptr)
843 /* obsolete, to be removed from libpng-1.4.0 */
844 return (png_ptr? 0L: 0L);
847 /* this function was added to libpng 1.2.0 and should exist by default */
849 png_get_asm_flagmask (int flag_select)
851 /* obsolete, to be removed from libpng-1.4.0 */
852 flag_select=flag_select;
856 /* GRR: could add this: && defined(PNG_MMX_CODE_SUPPORTED) */
857 /* this function was added to libpng 1.2.0 */
859 png_get_mmx_flagmask (int flag_select, int *compilerID)
861 /* obsolete, to be removed from libpng-1.4.0 */
862 flag_select=flag_select;
863 *compilerID = -1; /* unknown (i.e., no asm/MMX code compiled) */
867 /* this function was added to libpng 1.2.0 */
869 png_get_mmx_bitdepth_threshold (png_structp png_ptr)
871 /* obsolete, to be removed from libpng-1.4.0 */
872 return (png_ptr? 0: 0);
875 /* this function was added to libpng 1.2.0 */
877 png_get_mmx_rowbytes_threshold (png_structp png_ptr)
879 /* obsolete, to be removed from libpng-1.4.0 */
880 return (png_ptr? 0L: 0L);
882 #endif /* ?PNG_1_0_X */
883 #endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
885 #ifdef PNG_SET_USER_LIMITS_SUPPORTED
886 /* these functions were added to libpng 1.2.6 */
888 png_get_user_width_max (png_structp png_ptr)
890 return (png_ptr? png_ptr->user_width_max : 0);
893 png_get_user_height_max (png_structp png_ptr)
895 return (png_ptr? png_ptr->user_height_max : 0);
897 #endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
900 #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */