tif_compress.c File Reference

#include "tiffiop.h"

Include dependency graph for tif_compress.c:

Go to the source code of this file.

Classes
struct	_codec

Typedefs
typedef struct _codec	codec_t

Functions
static int	TIFFNoEncode (TIFF *tif, const char *method)
int	_TIFFNoRowEncode (TIFF *tif, uint8_t *pp, tmsize_t cc, uint16_t s)
int	_TIFFNoStripEncode (TIFF *tif, uint8_t *pp, tmsize_t cc, uint16_t s)
int	_TIFFNoTileEncode (TIFF *tif, uint8_t *pp, tmsize_t cc, uint16_t s)
static int	TIFFNoDecode (TIFF *tif, const char *method)
static int	_TIFFNoFixupTags (TIFF *tif)
int	_TIFFNoRowDecode (TIFF *tif, uint8_t *pp, tmsize_t cc, uint16_t s)
int	_TIFFNoStripDecode (TIFF *tif, uint8_t *pp, tmsize_t cc, uint16_t s)
int	_TIFFNoTileDecode (TIFF *tif, uint8_t *pp, tmsize_t cc, uint16_t s)
int	_TIFFNoSeek (TIFF *tif, uint32_t off)
int	_TIFFNoPreCode (TIFF *tif, uint16_t s)
static int	_TIFFtrue (TIFF *tif)
static void	_TIFFvoid (TIFF *tif)
void	_TIFFSetDefaultCompressionState (TIFF *tif)
int	TIFFSetCompressionScheme (TIFF *tif, int scheme)
const TIFFCodec *	TIFFFindCODEC (uint16_t scheme)
TIFFCodec *	TIFFRegisterCODEC (uint16_t scheme, const char *name, TIFFInitMethod init)
void	TIFFUnRegisterCODEC (TIFFCodec *c)
TIFFCodec *	TIFFGetConfiguredCODECs ()

Variables
static codec_t *	registeredCODECS = NULL

Typedef Documentation

codec_t

typedef struct _codec codec_t

Function Documentation

_TIFFNoFixupTags()

static int _TIFFNoFixupTags ( TIFF *  tif )

static

Definition at line 90 of file tif_compress.c.

{
    (void)tif;
    return (1);
}

Referenced by _TIFFSetDefaultCompressionState().

_TIFFNoPreCode()

int _TIFFNoPreCode	(	TIFF *	tif,
		uint16_t	s
	)

Definition at line 128 of file tif_compress.c.

{
    (void)tif;
    (void)s;
    return (1);
}

Referenced by _TIFFSetDefaultCompressionState().

_TIFFNoRowDecode()

int _TIFFNoRowDecode	(	TIFF *	tif,
		uint8_t *	pp,
		tmsize_t	cc,
		uint16_t	s
	)

Definition at line 96 of file tif_compress.c.

{
    (void)pp;
    (void)cc;
    (void)s;
    return (TIFFNoDecode(tif, "scanline"));
}

Referenced by _TIFFSetDefaultCompressionState().

_TIFFNoRowEncode()

int _TIFFNoRowEncode	(	TIFF *	tif,
		uint8_t *	pp,
		tmsize_t	cc,
		uint16_t	s
	)

Definition at line 51 of file tif_compress.c.

{
    (void)pp;
    (void)cc;
    (void)s;
    return (TIFFNoEncode(tif, "scanline"));
}

Referenced by _TIFFSetDefaultCompressionState().

_TIFFNoSeek()

int _TIFFNoSeek	(	TIFF *	tif,
		uint32_t	off
	)

Definition at line 120 of file tif_compress.c.

{
    (void)off;
    TIFFErrorExtR(tif, tif->tif_name,
                  "Compression algorithm does not support random access");
    return (0);
}

Referenced by _TIFFSetDefaultCompressionState().

_TIFFNoStripDecode()

int _TIFFNoStripDecode	(	TIFF *	tif,
		uint8_t *	pp,
		tmsize_t	cc,
		uint16_t	s
	)

Definition at line 104 of file tif_compress.c.

{
    (void)pp;
    (void)cc;
    (void)s;
    return (TIFFNoDecode(tif, "strip"));
}

Referenced by _TIFFSetDefaultCompressionState().

_TIFFNoStripEncode()

int _TIFFNoStripEncode	(	TIFF *	tif,
		uint8_t *	pp,
		tmsize_t	cc,
		uint16_t	s
	)

Definition at line 59 of file tif_compress.c.

{
    (void)pp;
    (void)cc;
    (void)s;
    return (TIFFNoEncode(tif, "strip"));
}

Referenced by _TIFFSetDefaultCompressionState().

_TIFFNoTileDecode()

int _TIFFNoTileDecode	(	TIFF *	tif,
		uint8_t *	pp,
		tmsize_t	cc,
		uint16_t	s
	)

Definition at line 112 of file tif_compress.c.

{
    (void)pp;
    (void)cc;
    (void)s;
    return (TIFFNoDecode(tif, "tile"));
}

Referenced by _TIFFSetDefaultCompressionState().

_TIFFNoTileEncode()

int _TIFFNoTileEncode	(	TIFF *	tif,
		uint8_t *	pp,
		tmsize_t	cc,
		uint16_t	s
	)

Definition at line 67 of file tif_compress.c.

{
    (void)pp;
    (void)cc;
    (void)s;
    return (TIFFNoEncode(tif, "tile"));
}

Referenced by _TIFFSetDefaultCompressionState().

_TIFFSetDefaultCompressionState()

void _TIFFSetDefaultCompressionState

(

TIFF *

tif

)

Definition at line 142 of file tif_compress.c.

{
    tif->tif_fixuptags = _TIFFNoFixupTags;
    tif->tif_decodestatus = TRUE;
    tif->tif_setupdecode = _TIFFtrue;
    tif->tif_predecode = _TIFFNoPreCode;
    tif->tif_decoderow = _TIFFNoRowDecode;
    tif->tif_decodestrip = _TIFFNoStripDecode;
    tif->tif_decodetile = _TIFFNoTileDecode;
    tif->tif_encodestatus = TRUE;
    tif->tif_setupencode = _TIFFtrue;
    tif->tif_preencode = _TIFFNoPreCode;
    tif->tif_postencode = _TIFFtrue;
    tif->tif_encoderow = _TIFFNoRowEncode;
    tif->tif_encodestrip = _TIFFNoStripEncode;
    tif->tif_encodetile = _TIFFNoTileEncode;
    tif->tif_close = _TIFFvoid;
    tif->tif_seek = _TIFFNoSeek;
    tif->tif_cleanup = _TIFFvoid;
    tif->tif_defstripsize = _TIFFDefaultStripSize;
    tif->tif_deftilesize = _TIFFDefaultTileSize;
    tif->tif_flags &= ~(TIFF_NOBITREV | TIFF_NOREADRAW);
}

Referenced by TIFFClientOpenExt(), and TIFFSetCompressionScheme().

_TIFFtrue()

static int _TIFFtrue ( TIFF *  tif )

static

Definition at line 135 of file tif_compress.c.

{
    (void)tif;
    return (1);
}

Referenced by _TIFFSetDefaultCompressionState().

_TIFFvoid()

static void _TIFFvoid ( TIFF *  tif )

static

Definition at line 140 of file tif_compress.c.

{ (void)tif; }

Referenced by _TIFFSetDefaultCompressionState().

TIFFFindCODEC()

const TIFFCodec * TIFFFindCODEC

(

uint16_t

scheme

)

Definition at line 192 of file tif_compress.c.

{
    const TIFFCodec *c;
    codec_t *cd;
 
    for (cd = registeredCODECS; cd; cd = cd->next)
        if (cd->info->scheme == scheme)
            return ((const TIFFCodec *)cd->info);
    for (c = _TIFFBuiltinCODECS; c->name; c++)
        if (c->scheme == scheme)
            return (c);
    return ((const TIFFCodec *)0);
}

Referenced by _notConfigured(), TIFFIsCODECConfigured(), TIFFNoDecode(), TIFFNoEncode(), TIFFPrintDirectory(), and TIFFSetCompressionScheme().

TIFFGetConfiguredCODECs()

TIFFCodec * TIFFGetConfiguredCODECs

(

void

)

Get list of configured codecs, both built-in and registered by user. Caller is responsible to free this structure.

Returns

returns array of TIFFCodec records (the last record should be NULL) or NULL if function failed.

Definition at line 261 of file tif_compress.c.

{
    int i = 1;
    codec_t *cd;
    const TIFFCodec *c;
    TIFFCodec *codecs = NULL;
    TIFFCodec *new_codecs;
 
    for (cd = registeredCODECS; cd; cd = cd->next)
    {
        new_codecs =
            (TIFFCodec *)_TIFFreallocExt(NULL, codecs, i * sizeof(TIFFCodec));
        if (!new_codecs)
        {
            _TIFFfreeExt(NULL, codecs);
            return NULL;
        }
        codecs = new_codecs;
        _TIFFmemcpy(codecs + i - 1, cd->info, sizeof(TIFFCodec));
        i++;
    }
    for (c = _TIFFBuiltinCODECS; c->name; c++)
    {
        if (TIFFIsCODECConfigured(c->scheme))
        {
            new_codecs = (TIFFCodec *)_TIFFreallocExt(NULL, codecs,
                                                      i * sizeof(TIFFCodec));
            if (!new_codecs)
            {
                _TIFFfreeExt(NULL, codecs);
                return NULL;
            }
            codecs = new_codecs;
            _TIFFmemcpy(codecs + i - 1, (const void *)c, sizeof(TIFFCodec));
            i++;
        }
    }
 
    new_codecs =
        (TIFFCodec *)_TIFFreallocExt(NULL, codecs, i * sizeof(TIFFCodec));
    if (!new_codecs)
    {
        _TIFFfreeExt(NULL, codecs);
        return NULL;
    }
    codecs = new_codecs;
    _TIFFmemset(codecs + i - 1, 0, sizeof(TIFFCodec));
 
    return codecs;
}

TIFFNoDecode()

static int TIFFNoDecode ( TIFF *  tif, const char *  method  )

static

Definition at line 75 of file tif_compress.c.

{
    const TIFFCodec *c = TIFFFindCODEC(tif->tif_dir.td_compression);
 
    if (c)
        TIFFErrorExtR(tif, tif->tif_name, "%s %s decoding is not implemented",
                      c->name, method);
    else
        TIFFErrorExtR(tif, tif->tif_name,
                      "Compression scheme %" PRIu16
                      " %s decoding is not implemented",
                      tif->tif_dir.td_compression, method);
    return (0);
}

Referenced by _TIFFNoRowDecode(), _TIFFNoStripDecode(), and _TIFFNoTileDecode().

TIFFNoEncode()

static int TIFFNoEncode ( TIFF *  tif, const char *  method  )

static

Definition at line 32 of file tif_compress.c.

{
    const TIFFCodec *c = TIFFFindCODEC(tif->tif_dir.td_compression);
 
    if (c)
    {
        TIFFErrorExtR(tif, tif->tif_name, "%s %s encoding is not implemented",
                      c->name, method);
    }
    else
    {
        TIFFErrorExtR(tif, tif->tif_name,
                      "Compression scheme %" PRIu16
                      " %s encoding is not implemented",
                      tif->tif_dir.td_compression, method);
    }
    return (-1);
}

Referenced by _TIFFNoRowEncode(), _TIFFNoStripEncode(), and _TIFFNoTileEncode().

TIFFRegisterCODEC()

TIFFCodec * TIFFRegisterCODEC	(	uint16_t	scheme,
		const char *	name,
		TIFFInitMethod	init
	)

Definition at line 206 of file tif_compress.c.

{
    codec_t *cd = (codec_t *)_TIFFmallocExt(
        NULL,
        (tmsize_t)(sizeof(codec_t) + sizeof(TIFFCodec) + strlen(name) + 1));
 
    if (cd != NULL)
    {
        cd->info = (TIFFCodec *)((uint8_t *)cd + sizeof(codec_t));
        cd->info->name = (char *)((uint8_t *)cd->info + sizeof(TIFFCodec));
        strcpy(cd->info->name, name);
        cd->info->scheme = scheme;
        cd->info->init = init;
        cd->next = registeredCODECS;
        registeredCODECS = cd;
    }
    else
    {
        TIFFErrorExt(0, "TIFFRegisterCODEC",
                     "No space to register compression scheme %s", name);
        return NULL;
    }
    return (cd->info);
}

TIFFSetCompressionScheme()

int TIFFSetCompressionScheme	(	TIFF *	tif,
		int	scheme
	)

Definition at line 166 of file tif_compress.c.

{
    const TIFFCodec *c = TIFFFindCODEC((uint16_t)scheme);
 
    _TIFFSetDefaultCompressionState(tif);
    /*
     * Don't treat an unknown compression scheme as an error.
     * This permits applications to open files with data that
     * the library does not have builtin support for, but which
     * may still be meaningful.
     */
    return (c ? (*c->init)(tif, scheme) : 1);
}

Referenced by _TIFFVSetField().

TIFFUnRegisterCODEC()

void TIFFUnRegisterCODEC

(

TIFFCodec *

c

)

Definition at line 232 of file tif_compress.c.

{
    codec_t *cd;
    codec_t **pcd;
 
    for (pcd = &registeredCODECS; (cd = *pcd) != NULL; pcd = &cd->next)
        if (cd->info == c)
        {
            *pcd = cd->next;
            _TIFFfreeExt(NULL, cd);
            return;
        }
    TIFFErrorExt(0, "TIFFUnRegisterCODEC",
                 "Cannot remove compression scheme %s; not registered",
                 c->name);
}

Variable Documentation

registeredCODECS

codec_t* registeredCODECS = NULL

static

Definition at line 190 of file tif_compress.c.

Referenced by TIFFFindCODEC(), TIFFGetConfiguredCODECs(), TIFFRegisterCODEC(), and TIFFUnRegisterCODEC().