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https://github.com/opencv/opencv.git
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46743c1701
Include three fixes:e68ba5df576c7c8ce372c9451cab66and three chores:d86a11d3abbab9f94a11fb768002d4I have reviewed CMakeLists.txt and I think disabling unused-variable warning is not needed.
538 lines
13 KiB
C
538 lines
13 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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#ifndef SPNG_H
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#define SPNG_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if (defined(_WIN32) || defined(__CYGWIN__)) && !defined(SPNG_STATIC)
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#if defined(SPNG__BUILD)
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#define SPNG_API __declspec(dllexport)
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#else
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#define SPNG_API __declspec(dllimport)
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#endif
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#else
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#define SPNG_API
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#endif
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#if defined(_MSC_VER)
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#define SPNG_CDECL __cdecl
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#else
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#define SPNG_CDECL
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#endif
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#include <stdlib.h>
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#include <stdint.h>
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#include <stdio.h>
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#define SPNG_VERSION_MAJOR 0
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#define SPNG_VERSION_MINOR 7
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#define SPNG_VERSION_PATCH 4
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enum spng_errno
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{
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SPNG_IO_ERROR = -2,
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SPNG_IO_EOF = -1,
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SPNG_OK = 0,
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SPNG_EINVAL,
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SPNG_EMEM,
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SPNG_EOVERFLOW,
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SPNG_ESIGNATURE,
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SPNG_EWIDTH,
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SPNG_EHEIGHT,
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SPNG_EUSER_WIDTH,
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SPNG_EUSER_HEIGHT,
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SPNG_EBIT_DEPTH,
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SPNG_ECOLOR_TYPE,
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SPNG_ECOMPRESSION_METHOD,
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SPNG_EFILTER_METHOD,
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SPNG_EINTERLACE_METHOD,
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SPNG_EIHDR_SIZE,
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SPNG_ENOIHDR,
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SPNG_ECHUNK_POS,
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SPNG_ECHUNK_SIZE,
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SPNG_ECHUNK_CRC,
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SPNG_ECHUNK_TYPE,
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SPNG_ECHUNK_UNKNOWN_CRITICAL,
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SPNG_EDUP_PLTE,
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SPNG_EDUP_CHRM,
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SPNG_EDUP_GAMA,
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SPNG_EDUP_ICCP,
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SPNG_EDUP_SBIT,
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SPNG_EDUP_SRGB,
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SPNG_EDUP_BKGD,
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SPNG_EDUP_HIST,
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SPNG_EDUP_TRNS,
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SPNG_EDUP_PHYS,
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SPNG_EDUP_TIME,
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SPNG_EDUP_OFFS,
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SPNG_EDUP_EXIF,
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SPNG_ECHRM,
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SPNG_EPLTE_IDX,
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SPNG_ETRNS_COLOR_TYPE,
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SPNG_ETRNS_NO_PLTE,
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SPNG_EGAMA,
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SPNG_EICCP_NAME,
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SPNG_EICCP_COMPRESSION_METHOD,
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SPNG_ESBIT,
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SPNG_ESRGB,
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SPNG_ETEXT,
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SPNG_ETEXT_KEYWORD,
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SPNG_EZTXT,
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SPNG_EZTXT_COMPRESSION_METHOD,
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SPNG_EITXT,
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SPNG_EITXT_COMPRESSION_FLAG,
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SPNG_EITXT_COMPRESSION_METHOD,
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SPNG_EITXT_LANG_TAG,
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SPNG_EITXT_TRANSLATED_KEY,
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SPNG_EBKGD_NO_PLTE,
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SPNG_EBKGD_PLTE_IDX,
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SPNG_EHIST_NO_PLTE,
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SPNG_EPHYS,
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SPNG_ESPLT_NAME,
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SPNG_ESPLT_DUP_NAME,
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SPNG_ESPLT_DEPTH,
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SPNG_ETIME,
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SPNG_EOFFS,
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SPNG_EEXIF,
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SPNG_EIDAT_TOO_SHORT,
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SPNG_EIDAT_STREAM,
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SPNG_EZLIB,
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SPNG_EFILTER,
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SPNG_EBUFSIZ,
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SPNG_EIO,
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SPNG_EOF,
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SPNG_EBUF_SET,
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SPNG_EBADSTATE,
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SPNG_EFMT,
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SPNG_EFLAGS,
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SPNG_ECHUNKAVAIL,
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SPNG_ENCODE_ONLY,
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SPNG_EOI,
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SPNG_ENOPLTE,
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SPNG_ECHUNK_LIMITS,
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SPNG_EZLIB_INIT,
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SPNG_ECHUNK_STDLEN,
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SPNG_EINTERNAL,
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SPNG_ECTXTYPE,
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SPNG_ENOSRC,
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SPNG_ENODST,
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SPNG_EOPSTATE,
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SPNG_ENOTFINAL,
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};
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enum spng_text_type
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{
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SPNG_TEXT = 1,
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SPNG_ZTXT = 2,
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SPNG_ITXT = 3
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};
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enum spng_color_type
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{
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SPNG_COLOR_TYPE_GRAYSCALE = 0,
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SPNG_COLOR_TYPE_TRUECOLOR = 2,
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SPNG_COLOR_TYPE_INDEXED = 3,
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SPNG_COLOR_TYPE_GRAYSCALE_ALPHA = 4,
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SPNG_COLOR_TYPE_TRUECOLOR_ALPHA = 6
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};
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enum spng_filter
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{
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SPNG_FILTER_NONE = 0,
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SPNG_FILTER_SUB = 1,
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SPNG_FILTER_UP = 2,
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SPNG_FILTER_AVERAGE = 3,
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SPNG_FILTER_PAETH = 4
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};
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enum spng_filter_choice
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{
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SPNG_DISABLE_FILTERING = 0,
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SPNG_FILTER_CHOICE_NONE = 8,
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SPNG_FILTER_CHOICE_SUB = 16,
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SPNG_FILTER_CHOICE_UP = 32,
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SPNG_FILTER_CHOICE_AVG = 64,
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SPNG_FILTER_CHOICE_PAETH = 128,
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SPNG_FILTER_CHOICE_ALL = (8|16|32|64|128)
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};
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enum spng_interlace_method
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{
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SPNG_INTERLACE_NONE = 0,
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SPNG_INTERLACE_ADAM7 = 1
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};
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/* Channels are always in byte-order */
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enum spng_format
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{
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SPNG_FMT_RGBA8 = 1,
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SPNG_FMT_RGBA16 = 2,
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SPNG_FMT_RGB8 = 4,
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/* Partially implemented, see documentation */
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SPNG_FMT_GA8 = 16,
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SPNG_FMT_GA16 = 32,
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SPNG_FMT_G8 = 64,
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/* No conversion or scaling */
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SPNG_FMT_PNG = 256,
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SPNG_FMT_RAW = 512 /* big-endian (everything else is host-endian) */
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};
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enum spng_ctx_flags
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{
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SPNG_CTX_IGNORE_ADLER32 = 1, /* Ignore checksum in DEFLATE streams */
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SPNG_CTX_ENCODER = 2 /* Create an encoder context */
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};
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enum spng_decode_flags
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{
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SPNG_DECODE_USE_TRNS = 1, /* Deprecated */
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SPNG_DECODE_USE_GAMA = 2, /* Deprecated */
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SPNG_DECODE_USE_SBIT = 8, /* Undocumented */
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SPNG_DECODE_TRNS = 1, /* Apply transparency */
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SPNG_DECODE_GAMMA = 2, /* Apply gamma correction */
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SPNG_DECODE_PROGRESSIVE = 256 /* Initialize for progressive reads */
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};
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enum spng_crc_action
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{
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/* Default for critical chunks */
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SPNG_CRC_ERROR = 0,
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/* Discard chunk, invalid for critical chunks.
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Since v0.6.2: default for ancillary chunks */
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SPNG_CRC_DISCARD = 1,
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/* Ignore and don't calculate checksum.
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Since v0.6.2: also ignores checksums in DEFLATE streams */
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SPNG_CRC_USE = 2
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};
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enum spng_encode_flags
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{
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SPNG_ENCODE_PROGRESSIVE = 1, /* Initialize for progressive writes */
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SPNG_ENCODE_FINALIZE = 2, /* Finalize PNG after encoding image */
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};
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struct spng_ihdr
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{
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uint32_t width;
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uint32_t height;
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uint8_t bit_depth;
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uint8_t color_type;
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uint8_t compression_method;
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uint8_t filter_method;
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uint8_t interlace_method;
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};
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struct spng_plte_entry
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{
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uint8_t red;
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uint8_t green;
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uint8_t blue;
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uint8_t alpha; /* Reserved for internal use */
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};
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struct spng_plte
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{
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uint32_t n_entries;
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struct spng_plte_entry entries[256];
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};
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struct spng_trns
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{
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uint16_t gray;
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uint16_t red;
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uint16_t green;
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uint16_t blue;
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uint32_t n_type3_entries;
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uint8_t type3_alpha[256];
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};
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struct spng_chrm_int
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{
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uint32_t white_point_x;
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uint32_t white_point_y;
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uint32_t red_x;
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uint32_t red_y;
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uint32_t green_x;
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uint32_t green_y;
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uint32_t blue_x;
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uint32_t blue_y;
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};
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struct spng_chrm
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{
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double white_point_x;
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double white_point_y;
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double red_x;
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double red_y;
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double green_x;
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double green_y;
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double blue_x;
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double blue_y;
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};
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struct spng_iccp
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{
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char profile_name[80];
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size_t profile_len;
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char *profile;
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};
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struct spng_sbit
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{
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uint8_t grayscale_bits;
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uint8_t red_bits;
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uint8_t green_bits;
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uint8_t blue_bits;
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uint8_t alpha_bits;
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};
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struct spng_text
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{
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char keyword[80];
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int type;
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size_t length;
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char *text;
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uint8_t compression_flag; /* iTXt only */
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uint8_t compression_method; /* iTXt, ztXt only */
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char *language_tag; /* iTXt only */
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char *translated_keyword; /* iTXt only */
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};
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struct spng_bkgd
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{
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uint16_t gray; /* Only for gray/gray alpha */
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uint16_t red;
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uint16_t green;
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uint16_t blue;
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uint16_t plte_index; /* Only for indexed color */
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};
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struct spng_hist
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{
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uint16_t frequency[256];
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};
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struct spng_phys
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{
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uint32_t ppu_x, ppu_y;
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uint8_t unit_specifier;
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};
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struct spng_splt_entry
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{
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uint16_t red;
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uint16_t green;
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uint16_t blue;
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uint16_t alpha;
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uint16_t frequency;
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};
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struct spng_splt
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{
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char name[80];
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uint8_t sample_depth;
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uint32_t n_entries;
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struct spng_splt_entry *entries;
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};
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struct spng_time
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{
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uint16_t year;
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uint8_t month;
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uint8_t day;
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uint8_t hour;
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uint8_t minute;
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uint8_t second;
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};
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struct spng_offs
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{
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int32_t x, y;
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uint8_t unit_specifier;
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};
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struct spng_exif
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{
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size_t length;
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char *data;
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};
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struct spng_chunk
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{
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size_t offset;
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uint32_t length;
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uint8_t type[4];
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uint32_t crc;
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};
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enum spng_location
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{
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SPNG_AFTER_IHDR = 1,
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SPNG_AFTER_PLTE = 2,
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SPNG_AFTER_IDAT = 8,
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};
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struct spng_unknown_chunk
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{
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uint8_t type[4];
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size_t length;
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void *data;
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enum spng_location location;
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};
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enum spng_option
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{
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SPNG_KEEP_UNKNOWN_CHUNKS = 1,
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SPNG_IMG_COMPRESSION_LEVEL,
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SPNG_IMG_WINDOW_BITS,
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SPNG_IMG_MEM_LEVEL,
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SPNG_IMG_COMPRESSION_STRATEGY,
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SPNG_TEXT_COMPRESSION_LEVEL,
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SPNG_TEXT_WINDOW_BITS,
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SPNG_TEXT_MEM_LEVEL,
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SPNG_TEXT_COMPRESSION_STRATEGY,
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SPNG_FILTER_CHOICE,
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SPNG_CHUNK_COUNT_LIMIT,
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SPNG_ENCODE_TO_BUFFER,
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};
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typedef void* SPNG_CDECL spng_malloc_fn(size_t size);
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typedef void* SPNG_CDECL spng_realloc_fn(void* ptr, size_t size);
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typedef void* SPNG_CDECL spng_calloc_fn(size_t count, size_t size);
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typedef void SPNG_CDECL spng_free_fn(void* ptr);
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struct spng_alloc
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{
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spng_malloc_fn *malloc_fn;
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spng_realloc_fn *realloc_fn;
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spng_calloc_fn *calloc_fn;
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spng_free_fn *free_fn;
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};
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struct spng_row_info
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{
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uint32_t scanline_idx;
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uint32_t row_num; /* deinterlaced row index */
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int pass;
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uint8_t filter;
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};
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typedef struct spng_ctx spng_ctx;
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typedef int spng_read_fn(spng_ctx *ctx, void *user, void *dest, size_t length);
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typedef int spng_write_fn(spng_ctx *ctx, void *user, void *src, size_t length);
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typedef int spng_rw_fn(spng_ctx *ctx, void *user, void *dst_src, size_t length);
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SPNG_API spng_ctx *spng_ctx_new(int flags);
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SPNG_API spng_ctx *spng_ctx_new2(struct spng_alloc *alloc, int flags);
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SPNG_API void spng_ctx_free(spng_ctx *ctx);
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SPNG_API int spng_set_png_buffer(spng_ctx *ctx, const void *buf, size_t size);
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SPNG_API int spng_set_png_stream(spng_ctx *ctx, spng_rw_fn *rw_func, void *user);
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SPNG_API int spng_set_png_file(spng_ctx *ctx, FILE *file);
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SPNG_API void *spng_get_png_buffer(spng_ctx *ctx, size_t *len, int *error);
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SPNG_API int spng_set_image_limits(spng_ctx *ctx, uint32_t width, uint32_t height);
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SPNG_API int spng_get_image_limits(spng_ctx *ctx, uint32_t *width, uint32_t *height);
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SPNG_API int spng_set_chunk_limits(spng_ctx *ctx, size_t chunk_size, size_t cache_size);
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SPNG_API int spng_get_chunk_limits(spng_ctx *ctx, size_t *chunk_size, size_t *cache_size);
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SPNG_API int spng_set_crc_action(spng_ctx *ctx, int critical, int ancillary);
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SPNG_API int spng_set_option(spng_ctx *ctx, enum spng_option option, int value);
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SPNG_API int spng_get_option(spng_ctx *ctx, enum spng_option option, int *value);
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SPNG_API int spng_decoded_image_size(spng_ctx *ctx, int fmt, size_t *len);
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/* Decode */
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SPNG_API int spng_decode_image(spng_ctx *ctx, void *out, size_t len, int fmt, int flags);
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/* Progressive decode */
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SPNG_API int spng_decode_scanline(spng_ctx *ctx, void *out, size_t len);
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SPNG_API int spng_decode_row(spng_ctx *ctx, void *out, size_t len);
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SPNG_API int spng_decode_chunks(spng_ctx *ctx);
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/* Encode/decode */
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SPNG_API int spng_get_row_info(spng_ctx *ctx, struct spng_row_info *row_info);
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/* Encode */
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SPNG_API int spng_encode_image(spng_ctx *ctx, const void *img, size_t len, int fmt, int flags);
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/* Progressive encode */
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SPNG_API int spng_encode_scanline(spng_ctx *ctx, const void *scanline, size_t len);
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SPNG_API int spng_encode_row(spng_ctx *ctx, const void *row, size_t len);
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SPNG_API int spng_encode_chunks(spng_ctx *ctx);
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SPNG_API int spng_get_ihdr(spng_ctx *ctx, struct spng_ihdr *ihdr);
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SPNG_API int spng_get_plte(spng_ctx *ctx, struct spng_plte *plte);
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SPNG_API int spng_get_trns(spng_ctx *ctx, struct spng_trns *trns);
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SPNG_API int spng_get_chrm(spng_ctx *ctx, struct spng_chrm *chrm);
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SPNG_API int spng_get_chrm_int(spng_ctx *ctx, struct spng_chrm_int *chrm_int);
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SPNG_API int spng_get_gama(spng_ctx *ctx, double *gamma);
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SPNG_API int spng_get_gama_int(spng_ctx *ctx, uint32_t *gama_int);
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SPNG_API int spng_get_iccp(spng_ctx *ctx, struct spng_iccp *iccp);
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SPNG_API int spng_get_sbit(spng_ctx *ctx, struct spng_sbit *sbit);
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SPNG_API int spng_get_srgb(spng_ctx *ctx, uint8_t *rendering_intent);
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SPNG_API int spng_get_text(spng_ctx *ctx, struct spng_text *text, uint32_t *n_text);
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SPNG_API int spng_get_bkgd(spng_ctx *ctx, struct spng_bkgd *bkgd);
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SPNG_API int spng_get_hist(spng_ctx *ctx, struct spng_hist *hist);
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SPNG_API int spng_get_phys(spng_ctx *ctx, struct spng_phys *phys);
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SPNG_API int spng_get_splt(spng_ctx *ctx, struct spng_splt *splt, uint32_t *n_splt);
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SPNG_API int spng_get_time(spng_ctx *ctx, struct spng_time *time);
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SPNG_API int spng_get_unknown_chunks(spng_ctx *ctx, struct spng_unknown_chunk *chunks, uint32_t *n_chunks);
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/* Official extensions */
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SPNG_API int spng_get_offs(spng_ctx *ctx, struct spng_offs *offs);
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SPNG_API int spng_get_exif(spng_ctx *ctx, struct spng_exif *exif);
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SPNG_API int spng_set_ihdr(spng_ctx *ctx, struct spng_ihdr *ihdr);
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SPNG_API int spng_set_plte(spng_ctx *ctx, struct spng_plte *plte);
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SPNG_API int spng_set_trns(spng_ctx *ctx, struct spng_trns *trns);
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SPNG_API int spng_set_chrm(spng_ctx *ctx, struct spng_chrm *chrm);
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SPNG_API int spng_set_chrm_int(spng_ctx *ctx, struct spng_chrm_int *chrm_int);
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SPNG_API int spng_set_gama(spng_ctx *ctx, double gamma);
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SPNG_API int spng_set_gama_int(spng_ctx *ctx, uint32_t gamma);
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SPNG_API int spng_set_iccp(spng_ctx *ctx, struct spng_iccp *iccp);
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SPNG_API int spng_set_sbit(spng_ctx *ctx, struct spng_sbit *sbit);
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SPNG_API int spng_set_srgb(spng_ctx *ctx, uint8_t rendering_intent);
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SPNG_API int spng_set_text(spng_ctx *ctx, struct spng_text *text, uint32_t n_text);
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SPNG_API int spng_set_bkgd(spng_ctx *ctx, struct spng_bkgd *bkgd);
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SPNG_API int spng_set_hist(spng_ctx *ctx, struct spng_hist *hist);
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SPNG_API int spng_set_phys(spng_ctx *ctx, struct spng_phys *phys);
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SPNG_API int spng_set_splt(spng_ctx *ctx, struct spng_splt *splt, uint32_t n_splt);
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SPNG_API int spng_set_time(spng_ctx *ctx, struct spng_time *time);
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SPNG_API int spng_set_unknown_chunks(spng_ctx *ctx, struct spng_unknown_chunk *chunks, uint32_t n_chunks);
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/* Official extensions */
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SPNG_API int spng_set_offs(spng_ctx *ctx, struct spng_offs *offs);
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SPNG_API int spng_set_exif(spng_ctx *ctx, struct spng_exif *exif);
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SPNG_API const char *spng_strerror(int err);
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SPNG_API const char *spng_version_string(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* SPNG_H */
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