343 lines
9.5 KiB
Groff
343 lines
9.5 KiB
Groff
.TH LIBPNGPF 3 "March 7, 1998"
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.SH NAME
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libpng \- Portable Network Graphics (PNG) Reference Library
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(private functions)
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.SH SYNOPSIS
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#include <png.h>
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void png_build_gamma_table (png_structp png_ptr);
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void png_build_grayscale_palette (int bit_depth, png_colorp
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palette);
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void png_calculate_crc (png_structp png_ptr, png_bytep ptr,
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png_size_t length);
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void png_check_chunk_name (png_structp png_ptr, png_bytep
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chunk_name);
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png_size_t png_check_keyword (png_structp png_ptr, png_charp
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key, png_charpp new_key);
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void png_combine_row (png_structp png_ptr, png_bytep row, int
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mask);
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void png_correct_palette (png_structp png_ptr, png_colorp
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palette, int num_palette);
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int png_crc_error (png_structp png_ptr);
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int png_crc_finish (png_structp png_ptr, png_uint_32 skip);
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void png_crc_read (png_structp png_ptr, png_bytep buf,
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png_size_t length);
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png_voidp png_create_struct (int type);
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void png_destroy_struct (png_voidp struct_ptr);
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void png_do_background (png_row_infop row_info, png_bytep row,
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png_color_16p trans_values, png_color_16p background,
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png_color_16p background_1, png_bytep gamma_table, png_bytep
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gamma_from_1, png_bytep gamma_to_1, png_uint_16pp gamma_16,
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png_uint_16pp gamma_16_from_1, png_uint_16pp gamma_16_to_1, int
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gamma_shift);
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void png_do_bgr (png_row_infop row_info, png_bytep row);
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void png_do_chop (png_row_infop row_info, png_bytep row);
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void png_do_dither (png_row_infop row_info, png_bytep row,
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png_bytep palette_lookup, png_bytep dither_lookup);
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void png_do_expand (png_row_infop row_info, png_bytep row,
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png_color_16p trans_value);
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void png_do_expand_palette (png_row_infop row_info, png_bytep
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row, png_colorp palette, png_bytep trans, int num_trans);
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void png_do_gamma (png_row_infop row_info, png_bytep row,
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png_bytep gamma_table, png_uint_16pp gamma_16_table, int
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gamma_shift);
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void png_do_gray_to_rgb (png_row_infop row_info, png_bytep
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row);
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void png_do_invert (png_row_infop row_info, png_bytep row);
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void png_do_pack (png_row_infop row_info, png_bytep row,
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png_uint_32 bit_depth);
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void png_do_packswap (png_row_infop row_info, png_bytep row);
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void png_do_read_filler (png_row_infop row_info, png_bytep row,
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png_uint_32 filler, png_uint_32 flags);
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void png_do_read_interlace (png_row_infop row_info, png_bytep
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row, int pass, png_uint_32 transformations);
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void png_do_read_invert_alpha (png_row_infop row_info,
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png_bytep row);
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void png_do_read_swap_alpha (png_row_infop row_info, png_bytep
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row);
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void png_do_read_transformations (png_structp png_ptr);
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void png_do_rgb_to_gray (png_row_infop row_info, png_bytep
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row);
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void png_do_shift (png_row_infop row_info, png_bytep row,
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png_color_8p bit_depth);
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void png_do_strip_filler (png_row_infop row_info, png_bytep
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row, png_uint_32 flags);
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void png_do_swap (png_row_infop row_info, png_bytep row);
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void png_do_unpack (png_row_infop row_info, png_bytep row);
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void png_do_unshift (png_row_infop row_info, png_bytep row,
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png_color_8p sig_bits);
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void png_do_write_interlace (png_row_infop row_info, png_bytep
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row, int pass);
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void png_do_write_invert_alpha (png_row_infop row_info,
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png_bytep row);
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void png_do_write_swap_alpha (png_row_infop row_info, png_bytep
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row);
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void png_do_write_transformations (png_structp png_ptr);
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void *png_far_to_near (png_structp png_ptr,png_voidp ptr,
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int check);
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void png_flush (png_structp png_ptr);
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png_int_32 png_get_int_32 (png_bytep buf);
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png_uint_16 png_get_uint_16 (png_bytep buf);
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png_uint_32 png_get_uint_32 (png_bytep buf);
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void png_handle_bKGD (png_structp png_ptr, png_infop info_ptr,
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png_uint_32 length);
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void png_handle_cHRM (png_structp png_ptr, png_infop info_ptr,
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png_uint_32 length);
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void png_handle_gAMA (png_structp png_ptr, png_infop info_ptr,
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png_uint_32 length);
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void png_handle_hIST (png_structp png_ptr, png_infop info_ptr,
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png_uint_32 length);
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void png_handle_IEND (png_structp png_ptr, png_infop info_ptr,
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png_uint_32 length);
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void png_handle_IHDR (png_structp png_ptr, png_infop info_ptr,
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png_uint_32 length);
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void png_handle_oFFs (png_structp png_ptr, png_infop info_ptr,
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png_uint_32 length);
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void png_handle_pCAL (png_structp png_ptr, png_infop info_ptr,
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png_uint_32 length);
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void png_handle_pHYs (png_structp png_ptr, png_infop info_ptr,
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png_uint_32 length);
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void png_handle_PLTE (png_structp png_ptr, png_infop info_ptr,
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png_uint_32 length);
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void png_handle_sBIT (png_structp png_ptr, png_infop info_ptr,
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png_uint_32 length);
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void png_handle_sRGB (png_structp png_ptr, png_infop info_ptr,
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png_uint_32 length);
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void png_handle_tEXt (png_structp png_ptr, png_infop info_ptr,
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png_uint_32 length);
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void png_handle_tIME (png_structp png_ptr, png_infop info_ptr,
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png_uint_32 length);
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void png_handle_tRNS (png_structp png_ptr, png_infop info_ptr,
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png_uint_32 length);
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void png_handle_unknown (png_structp png_ptr, png_infop
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info_ptr, png_uint_32 length);
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void png_handle_zTXt (png_structp png_ptr, png_infop info_ptr,
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png_uint_32 length);
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void png_info_destroy (png_structp png_ptr, png_infop
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info_ptr);
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void png_init_read_transformations (png_structp png_ptr);
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void png_process_IDAT_data (png_structp png_ptr, png_bytep
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buffer, png_size_t buffer_length);
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void png_process_some_data (png_structp png_ptr, png_infop
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info_ptr);
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void png_push_check_crc (png_structp png_ptr);
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void png_push_crc_finish (png_structp png_ptr);
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void png_push_crc_skip (png_structp png_ptr, png_uint_32
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length);
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void png_push_fill_buffer (png_structp png_ptr, png_bytep
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buffer, png_size_t length);
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void png_push_handle_tEXt (png_structp png_ptr, png_infop
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info_ptr, png_uint_32 length);
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void png_push_handle_unknown (png_structp png_ptr, png_infop
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info_ptr, png_uint_32 length);
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void png_push_handle_zTXt (png_structp png_ptr, png_infop
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info_ptr, png_uint_32 length);
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void png_push_have_end (png_structp png_ptr, png_infop
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info_ptr);
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void png_push_have_info (png_structp png_ptr, png_infop
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info_ptr);
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void png_push_have_row (png_structp png_ptr, png_bytep row);
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void png_push_process_row (png_structp png_ptr);
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void png_push_read_chunk (png_structp png_ptr, png_infop
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info_ptr);
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void png_push_read_end (png_structp png_ptr, png_infop
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info_ptr);
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void png_push_read_IDAT (png_structp png_ptr);
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void png_push_read_sig (png_structp png_ptr, png_infop
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info_ptr);
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void png_push_read_tEXt (png_structp png_ptr, png_infop
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info_ptr);
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void png_push_read_zTXt (png_structp png_ptr, png_infop
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info_ptr);
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void png_push_restore_buffer (png_structp png_ptr, png_bytep
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buffer, png_size_t buffer_length);
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void png_push_save_buffer (png_structp png_ptr);
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void png_read_data (png_structp png_ptr, png_bytep data,
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png_size_t length);
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void png_read_filter_row (png_structp png_ptr, png_row_infop
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row_info, png_bytep row, png_bytep prev_row, int filter);
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void png_read_finish_row (png_structp png_ptr);
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void png_read_init (png_structp png_ptr);
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void png_read_push_finish_row (png_structp png_ptr);
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void png_read_start_row (png_structp png_ptr);
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void png_read_transform_info (png_structp png_ptr, png_infop
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info_ptr);
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void png_reset_crc (png_structp png_ptr);
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void png_save_int_32 (png_bytep buf, png_int_32 i);
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void png_save_uint_16 (png_bytep buf, unsigned int i);
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void png_save_uint_32 (png_bytep buf, png_uint_32 i);
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void png_write_bKGD (png_structp png_ptr, png_color_16p values,
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int color_type);
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void png_write_cHRM (png_structp png_ptr, double white_x,
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double white_y, double red_x, double red_y, double green_x,
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double green_y, double blue_x, double blue_y);
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void png_write_data (png_structp png_ptr, png_bytep data,
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png_size_t length);
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void png_write_filtered_row (png_structp png_ptr, png_bytep
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filtered_row);
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void png_write_find_filter (png_structp png_ptr, png_row_infop
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row_info);
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void png_write_finish_row (png_structp png_ptr);
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void png_write_gAMA (png_structp png_ptr, double file_gamma);
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void png_write_hIST (png_structp png_ptr, png_uint_16p hist,
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int num_hist);
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void png_write_init (png_structp png_ptr);
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void png_write_IDAT (png_structp png_ptr, png_bytep data,
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png_size_t length);
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void png_write_IEND (png_structp png_ptr);
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void png_write_IHDR (png_structp png_ptr, png_uint_32 width,
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png_uint_32 height, int bit_depth, int color_type, int
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compression_type, int filter_type, int interlace_type);
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void png_write_oFFs (png_structp png_ptr, png_uint_32 x_offset,
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png_uint_32 y_offset, int unit_type);
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void png_write_pCAL (png_structp png_ptr, png_charp purpose,
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png_int_32 X0, png_int_32 X1, int type, int nparams, png_charp
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units, png_charpp params);
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void png_write_pHYs (png_structp png_ptr, png_uint_32
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x_pixels_per_unit, png_uint_32 y_pixels_per_unit, int
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unit_type);
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void png_write_PLTE (png_structp png_ptr, png_colorp palette,
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png_uint_32 num_pal);
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void png_write_sBIT (png_structp png_ptr, png_color_8p sbit,
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int color_type);
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void png_write_sig (png_structp png_ptr);
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void png_write_sRGB (png_structp png_ptr, int intent);
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void png_write_start_row (png_structp png_ptr);
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void png_write_tEXt (png_structp png_ptr, png_charp key,
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png_charp text, png_size_t text_len);
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void png_write_tIME (png_structp png_ptr, png_timep mod_time);
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void png_write_tRNS (png_structp png_ptr, png_bytep trans,
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png_color_16p values, int number, int color_type);
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void png_write_zTXt (png_structp png_ptr, png_charp key,
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png_charp text, png_size_t text_len, int compression);
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voidpf png_zalloc (voidpf png_ptr, uInt items, uInt size);
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void png_zfree (voidpf png_ptr, voidpf ptr);
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.SH DESCRIPTION
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The functions listed above are used privately by libpng
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and are not recommended for use by applications. They
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are listed alphabetically here as an aid to libpng maintainers.
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See png.h for more information on these functions.
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.SH SEE ALSO
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libpng(3), png(5)
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.SH AUTHOR
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Glenn Randers-Pehrson
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