/* pngset.c - storage of image information into info struct * * Copyright (c) 2018-2024 Cosmin Truta * Copyright (c) 1998-2018 Glenn Randers-Pehrson * Copyright (c) 1996-1997 Andreas Dilger * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc. * * This code is released under the libpng license. * For conditions of distribution and use, see the disclaimer * and license in png.h * * The functions here are used during reads to store data from the file * into the info struct, and during writes to store application data * into the info struct for writing into the file. This abstracts the * info struct and allows us to change the structure in the future. */ #include "pngpriv.h" #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) #ifdef PNG_bKGD_SUPPORTED void PNGAPI png_set_bKGD(png_const_structrp png_ptr, png_inforp info_ptr, png_const_color_16p background) { … } #endif #ifdef PNG_cHRM_SUPPORTED void PNGFAPI png_set_cHRM_fixed(png_const_structrp png_ptr, png_inforp info_ptr, png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x, png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y, png_fixed_point blue_x, png_fixed_point blue_y) { … } void PNGFAPI png_set_cHRM_XYZ_fixed(png_const_structrp png_ptr, png_inforp info_ptr, png_fixed_point int_red_X, png_fixed_point int_red_Y, png_fixed_point int_red_Z, png_fixed_point int_green_X, png_fixed_point int_green_Y, png_fixed_point int_green_Z, png_fixed_point int_blue_X, png_fixed_point int_blue_Y, png_fixed_point int_blue_Z) { … } # ifdef PNG_FLOATING_POINT_SUPPORTED void PNGAPI png_set_cHRM(png_const_structrp png_ptr, png_inforp info_ptr, double white_x, double white_y, double red_x, double red_y, double green_x, double green_y, double blue_x, double blue_y) { … } void PNGAPI png_set_cHRM_XYZ(png_const_structrp png_ptr, png_inforp info_ptr, double red_X, double red_Y, double red_Z, double green_X, double green_Y, double green_Z, double blue_X, double blue_Y, double blue_Z) { … } # endif /* FLOATING_POINT */ #endif /* cHRM */ #ifdef PNG_eXIf_SUPPORTED void PNGAPI png_set_eXIf(png_const_structrp png_ptr, png_inforp info_ptr, png_bytep exif) { … } void PNGAPI png_set_eXIf_1(png_const_structrp png_ptr, png_inforp info_ptr, png_uint_32 num_exif, png_bytep exif) { … } #endif /* eXIf */ #ifdef PNG_gAMA_SUPPORTED void PNGFAPI png_set_gAMA_fixed(png_const_structrp png_ptr, png_inforp info_ptr, png_fixed_point file_gamma) { … } # ifdef PNG_FLOATING_POINT_SUPPORTED void PNGAPI png_set_gAMA(png_const_structrp png_ptr, png_inforp info_ptr, double file_gamma) { … } # endif #endif #ifdef PNG_hIST_SUPPORTED void PNGAPI png_set_hIST(png_const_structrp png_ptr, png_inforp info_ptr, png_const_uint_16p hist) { … } #endif void PNGAPI png_set_IHDR(png_const_structrp png_ptr, png_inforp info_ptr, png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, int interlace_type, int compression_type, int filter_type) { … } #ifdef PNG_oFFs_SUPPORTED void PNGAPI png_set_oFFs(png_const_structrp png_ptr, png_inforp info_ptr, png_int_32 offset_x, png_int_32 offset_y, int unit_type) { … } #endif #ifdef PNG_pCAL_SUPPORTED void PNGAPI png_set_pCAL(png_const_structrp png_ptr, png_inforp info_ptr, png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams, png_const_charp units, png_charpp params) { … } #endif #ifdef PNG_sCAL_SUPPORTED void PNGAPI png_set_sCAL_s(png_const_structrp png_ptr, png_inforp info_ptr, int unit, png_const_charp swidth, png_const_charp sheight) { … } # ifdef PNG_FLOATING_POINT_SUPPORTED void PNGAPI png_set_sCAL(png_const_structrp png_ptr, png_inforp info_ptr, int unit, double width, double height) { … } # endif # ifdef PNG_FIXED_POINT_SUPPORTED void PNGAPI png_set_sCAL_fixed(png_const_structrp png_ptr, png_inforp info_ptr, int unit, png_fixed_point width, png_fixed_point height) { … } # endif #endif #ifdef PNG_pHYs_SUPPORTED void PNGAPI png_set_pHYs(png_const_structrp png_ptr, png_inforp info_ptr, png_uint_32 res_x, png_uint_32 res_y, int unit_type) { … } #endif void PNGAPI png_set_PLTE(png_structrp png_ptr, png_inforp info_ptr, png_const_colorp palette, int num_palette) { … } #ifdef PNG_sBIT_SUPPORTED void PNGAPI png_set_sBIT(png_const_structrp png_ptr, png_inforp info_ptr, png_const_color_8p sig_bit) { … } #endif #ifdef PNG_sRGB_SUPPORTED void PNGAPI png_set_sRGB(png_const_structrp png_ptr, png_inforp info_ptr, int srgb_intent) { … } void PNGAPI png_set_sRGB_gAMA_and_cHRM(png_const_structrp png_ptr, png_inforp info_ptr, int srgb_intent) { … } #endif /* sRGB */ #ifdef PNG_iCCP_SUPPORTED void PNGAPI png_set_iCCP(png_const_structrp png_ptr, png_inforp info_ptr, png_const_charp name, int compression_type, png_const_bytep profile, png_uint_32 proflen) { … } #endif #ifdef PNG_TEXT_SUPPORTED void PNGAPI png_set_text(png_const_structrp png_ptr, png_inforp info_ptr, png_const_textp text_ptr, int num_text) { … } int /* PRIVATE */ png_set_text_2(png_const_structrp png_ptr, png_inforp info_ptr, png_const_textp text_ptr, int num_text) { … } #endif #ifdef PNG_tIME_SUPPORTED void PNGAPI png_set_tIME(png_const_structrp png_ptr, png_inforp info_ptr, png_const_timep mod_time) { … } #endif #ifdef PNG_tRNS_SUPPORTED void PNGAPI png_set_tRNS(png_structrp png_ptr, png_inforp info_ptr, png_const_bytep trans_alpha, int num_trans, png_const_color_16p trans_color) { … } #endif #ifdef PNG_sPLT_SUPPORTED void PNGAPI png_set_sPLT(png_const_structrp png_ptr, png_inforp info_ptr, png_const_sPLT_tp entries, int nentries) /* * entries - array of png_sPLT_t structures * to be added to the list of palettes * in the info structure. * * nentries - number of palette structures to be * added. */ { … } #endif /* sPLT */ #ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED static png_byte check_location(png_const_structrp png_ptr, int location) { … } void PNGAPI png_set_unknown_chunks(png_const_structrp png_ptr, png_inforp info_ptr, png_const_unknown_chunkp unknowns, int num_unknowns) { … } void PNGAPI png_set_unknown_chunk_location(png_const_structrp png_ptr, png_inforp info_ptr, int chunk, int location) { … } #endif /* STORE_UNKNOWN_CHUNKS */ #ifdef PNG_MNG_FEATURES_SUPPORTED png_uint_32 PNGAPI png_permit_mng_features(png_structrp png_ptr, png_uint_32 mng_features) { … } #endif #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED static unsigned int add_one_chunk(png_bytep list, unsigned int count, png_const_bytep add, int keep) { … } void PNGAPI png_set_keep_unknown_chunks(png_structrp png_ptr, int keep, png_const_bytep chunk_list, int num_chunks_in) { … } #endif #ifdef PNG_READ_USER_CHUNKS_SUPPORTED void PNGAPI png_set_read_user_chunk_fn(png_structrp png_ptr, png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn) { … } #endif #ifdef PNG_INFO_IMAGE_SUPPORTED void PNGAPI png_set_rows(png_const_structrp png_ptr, png_inforp info_ptr, png_bytepp row_pointers) { … } #endif void PNGAPI png_set_compression_buffer_size(png_structrp png_ptr, size_t size) { … } void PNGAPI png_set_invalid(png_const_structrp png_ptr, png_inforp info_ptr, int mask) { … } #ifdef PNG_SET_USER_LIMITS_SUPPORTED /* This function was added to libpng 1.2.6 */ void PNGAPI png_set_user_limits(png_structrp png_ptr, png_uint_32 user_width_max, png_uint_32 user_height_max) { … } /* This function was added to libpng 1.4.0 */ void PNGAPI png_set_chunk_cache_max(png_structrp png_ptr, png_uint_32 user_chunk_cache_max) { … } /* This function was added to libpng 1.4.1 */ void PNGAPI png_set_chunk_malloc_max(png_structrp png_ptr, png_alloc_size_t user_chunk_malloc_max) { … } #endif /* ?SET_USER_LIMITS */ #ifdef PNG_BENIGN_ERRORS_SUPPORTED void PNGAPI png_set_benign_errors(png_structrp png_ptr, int allowed) { … } #endif /* BENIGN_ERRORS */ #ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED /* Whether to report invalid palette index; added at libng-1.5.10. * It is possible for an indexed (color-type==3) PNG file to contain * pixels with invalid (out-of-range) indexes if the PLTE chunk has * fewer entries than the image's bit-depth would allow. We recover * from this gracefully by filling any incomplete palette with zeros * (opaque black). By default, when this occurs libpng will issue * a benign error. This API can be used to override that behavior. */ void PNGAPI png_set_check_for_invalid_index(png_structrp png_ptr, int allowed) { … } #endif #if defined(PNG_TEXT_SUPPORTED) || defined(PNG_pCAL_SUPPORTED) || \ defined(PNG_iCCP_SUPPORTED) || defined(PNG_sPLT_SUPPORTED) /* Check that the tEXt or zTXt keyword is valid per PNG 1.0 specification, * and if invalid, correct the keyword rather than discarding the entire * chunk. The PNG 1.0 specification requires keywords 1-79 characters in * length, forbids leading or trailing whitespace, multiple internal spaces, * and the non-break space (0x80) from ISO 8859-1. Returns keyword length. * * The 'new_key' buffer must be 80 characters in size (for the keyword plus a * trailing '\0'). If this routine returns 0 then there was no keyword, or a * valid one could not be generated, and the caller must png_error. */ png_uint_32 /* PRIVATE */ png_check_keyword(png_structrp png_ptr, png_const_charp key, png_bytep new_key) { … } #endif /* TEXT || pCAL || iCCP || sPLT */ #endif /* READ || WRITE */
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