MagickCore  7.0.7
Convert, Edit, Or Compose Bitmap Images
compress.c File Reference
Include dependency graph for compress.c:

Go to the source code of this file.

Data Structures

struct  _Ascii85Info
 
struct  HuffmanTable
 

Macros

#define TWId   23
 
#define MWId   24
 
#define TBId   25
 
#define MBId   26
 
#define EXId   27
 
#define MaxLineExtent   36
 
#define HashSize   1021
 
#define MBHashA   293
 
#define MBHashB   2695
 
#define MWHashA   3510
 
#define MWHashB   1178
 
#define InitializeHashTable(hash, table, a, b)
 
#define InputBit(bit)
 
#define HuffmanOutputCode(entry)
 
#define OutputBit(count)
 
#define LZWClr   256UL /* Clear Table Marker */
 
#define LZWEod   257UL /* End of Data marker */
 
#define OutputCode(code)
 

Typedefs

typedef struct HuffmanTable HuffmanTable
 

Functions

static char * Ascii85Tuple (unsigned char *data)
 
MagickExport void Ascii85Initialize (Image *image)
 
MagickExport void Ascii85Flush (Image *image)
 
MagickExport void Ascii85Encode (Image *image, const unsigned char code)
 
MagickExport MagickBooleanType HuffmanDecodeImage (Image *image, ExceptionInfo *exception)
 
MagickExport MagickBooleanType HuffmanEncodeImage (const ImageInfo *image_info, Image *image, Image *inject_image, ExceptionInfo *exception)
 
MagickExport MagickBooleanType LZWEncodeImage (Image *image, const size_t length, unsigned char *magick_restrict pixels, ExceptionInfo *exception)
 
MagickExport MagickBooleanType PackbitsEncodeImage (Image *image, const size_t length, unsigned char *magick_restrict pixels, ExceptionInfo *exception)
 
MagickExport MagickBooleanType ZLIBEncodeImage (Image *image, const size_t magick_unused(length), unsigned char *magick_unused(pixels), ExceptionInfo *exception)
 

Variables

static const HuffmanTable MBTable []
 
static const HuffmanTable EXTable []
 
static const HuffmanTable MWTable []
 
static const HuffmanTable TBTable []
 
static const HuffmanTable TWTable []
 

Macro Definition Documentation

◆ EXId

#define EXId   27

Definition at line 95 of file compress.c.

Referenced by HuffmanDecodeImage().

◆ HashSize

#define HashSize   1021

Referenced by HuffmanDecodeImage().

◆ HuffmanOutputCode

#define HuffmanOutputCode (   entry)
Value:
{ \
mask=one << (entry->length-1); \
while (mask != 0) \
{ \
OutputBit(((entry->code & mask) != 0 ? 1 : 0)); \
mask>>=1; \
} \
}

Referenced by HuffmanEncodeImage().

◆ InitializeHashTable

#define InitializeHashTable (   hash,
  table,
  a,
 
)
Value:
{ \
entry=table; \
while (entry->code != 0) \
{ \
hash[((entry->length+a)*(entry->code+b)) % HashSize]=(HuffmanTable *) entry; \
entry++; \
} \
}
#define HashSize

Referenced by HuffmanDecodeImage().

◆ InputBit

#define InputBit (   bit)
Value:
{ \
if ((mask & 0xff) == 0) \
{ \
byte=ReadBlobByte(image); \
if (byte == EOF) \
break; \
mask=0x80; \
} \
runlength++; \
bit=(size_t) ((byte & mask) != 0 ? 0x01 : 0x00); \
mask>>=1; \
if (bit != 0) \
runlength=0; \
}
MagickExport int ReadBlobByte(Image *)
Definition: blob.c:3634

Referenced by HuffmanDecodeImage().

◆ LZWClr

#define LZWClr   256UL /* Clear Table Marker */

Referenced by LZWEncodeImage().

◆ LZWEod

#define LZWEod   257UL /* End of Data marker */

Referenced by LZWEncodeImage().

◆ MaxLineExtent

#define MaxLineExtent   36

Definition at line 228 of file compress.c.

Referenced by Ascii85Encode(), and Ascii85Initialize().

◆ MBHashA

#define MBHashA   293

Referenced by HuffmanDecodeImage().

◆ MBHashB

#define MBHashB   2695

Referenced by HuffmanDecodeImage().

◆ MBId

#define MBId   26

Definition at line 94 of file compress.c.

Referenced by HuffmanDecodeImage().

◆ MWHashA

#define MWHashA   3510

Referenced by HuffmanDecodeImage().

◆ MWHashB

#define MWHashB   1178

Referenced by HuffmanDecodeImage().

◆ MWId

#define MWId   24

Definition at line 92 of file compress.c.

Referenced by HuffmanDecodeImage().

◆ OutputBit

#define OutputBit (   count)
Value:
{ \
DisableMSCWarning(4127) \
if (count > 0) \
byte=byte | bit; \
RestoreMSCWarning \
bit>>=1; \
if ((int) (bit & 0xff) == 0) \
{ \
if (LocaleCompare(image_info->magick,"FAX") == 0) \
(void) WriteBlobByte(image,(unsigned char) byte); \
Ascii85Encode(image,byte); \
byte='\0'; \
bit=(unsigned char) 0x80; \
} \
}
MagickExport ssize_t WriteBlobByte(Image *, const unsigned char)
MagickExport void Ascii85Encode(Image *image, const unsigned char code)
Definition: compress.c:302
MagickExport int LocaleCompare(const char *p, const char *q)
Definition: locale.c:1409

Referenced by HuffmanEncodeImage().

◆ OutputCode

#define OutputCode (   code)
Value:
{ \
accumulator+=code << (32-code_width-number_bits); \
number_bits+=code_width; \
while (number_bits >= 8) \
{ \
(void) WriteBlobByte(image,(unsigned char) (accumulator >> 24)); \
accumulator=accumulator << 8; \
number_bits-=8; \
} \
}
MagickExport ssize_t WriteBlobByte(Image *, const unsigned char)

Referenced by LZWEncodeImage().

◆ TBId

#define TBId   25

Definition at line 93 of file compress.c.

Referenced by HuffmanDecodeImage().

◆ TWId

#define TWId   23

Definition at line 91 of file compress.c.

Referenced by HuffmanDecodeImage().

Typedef Documentation

◆ HuffmanTable

typedef struct HuffmanTable HuffmanTable

Function Documentation

◆ Ascii85Encode()

MagickExport void Ascii85Encode ( Image image,
const unsigned char  code 
)

◆ Ascii85Flush()

◆ Ascii85Initialize()

◆ Ascii85Tuple()

static char* Ascii85Tuple ( unsigned char *  data)
static

Definition at line 230 of file compress.c.

Referenced by Ascii85Encode(), and Ascii85Flush().

◆ HuffmanDecodeImage()

◆ HuffmanEncodeImage()

◆ LZWEncodeImage()

◆ PackbitsEncodeImage()

◆ ZLIBEncodeImage()

MagickExport MagickBooleanType ZLIBEncodeImage ( Image image,
const size_t   magick_unusedlength,
unsigned char *  magick_unusedpixels,
ExceptionInfo exception 
)

Variable Documentation

◆ EXTable

const HuffmanTable EXTable[]
static
Initial value:
=
{
{ EXId, 0x08, 11, 1792 }, { EXId, 0x0c, 11, 1856 },
{ EXId, 0x0d, 11, 1920 }, { EXId, 0x12, 12, 1984 },
{ EXId, 0x13, 12, 2048 }, { EXId, 0x14, 12, 2112 },
{ EXId, 0x15, 12, 2176 }, { EXId, 0x16, 12, 2240 },
{ EXId, 0x17, 12, 2304 }, { EXId, 0x1c, 12, 2368 },
{ EXId, 0x1d, 12, 2432 }, { EXId, 0x1e, 12, 2496 },
{ EXId, 0x1f, 12, 2560 }, { EXId, 0x00, 0, 0 }
}
#define EXId
Definition: compress.c:95

Definition at line 117 of file compress.c.

Referenced by HuffmanDecodeImage(), and HuffmanEncodeImage().

◆ MBTable

const HuffmanTable MBTable[]
static
Initial value:
=
{
{ MBId, 0x0f, 10, 64 }, { MBId, 0xc8, 12, 128 },
{ MBId, 0xc9, 12, 192 }, { MBId, 0x5b, 12, 256 },
{ MBId, 0x33, 12, 320 }, { MBId, 0x34, 12, 384 },
{ MBId, 0x35, 12, 448 }, { MBId, 0x6c, 13, 512 },
{ MBId, 0x6d, 13, 576 }, { MBId, 0x4a, 13, 640 },
{ MBId, 0x4b, 13, 704 }, { MBId, 0x4c, 13, 768 },
{ MBId, 0x4d, 13, 832 }, { MBId, 0x72, 13, 896 },
{ MBId, 0x73, 13, 960 }, { MBId, 0x74, 13, 1024 },
{ MBId, 0x75, 13, 1088 }, { MBId, 0x76, 13, 1152 },
{ MBId, 0x77, 13, 1216 }, { MBId, 0x52, 13, 1280 },
{ MBId, 0x53, 13, 1344 }, { MBId, 0x54, 13, 1408 },
{ MBId, 0x55, 13, 1472 }, { MBId, 0x5a, 13, 1536 },
{ MBId, 0x5b, 13, 1600 }, { MBId, 0x64, 13, 1664 },
{ MBId, 0x65, 13, 1728 }, { MBId, 0x00, 0, 0 }
}
#define MBId
Definition: compress.c:94

Definition at line 98 of file compress.c.

Referenced by HuffmanDecodeImage(), and HuffmanEncodeImage().

◆ MWTable

const HuffmanTable MWTable[]
static
Initial value:
=
{
{ MWId, 0x1b, 5, 64 }, { MWId, 0x12, 5, 128 },
{ MWId, 0x17, 6, 192 }, { MWId, 0x37, 7, 256 },
{ MWId, 0x36, 8, 320 }, { MWId, 0x37, 8, 384 },
{ MWId, 0x64, 8, 448 }, { MWId, 0x65, 8, 512 },
{ MWId, 0x68, 8, 576 }, { MWId, 0x67, 8, 640 },
{ MWId, 0xcc, 9, 704 }, { MWId, 0xcd, 9, 768 },
{ MWId, 0xd2, 9, 832 }, { MWId, 0xd3, 9, 896 },
{ MWId, 0xd4, 9, 960 }, { MWId, 0xd5, 9, 1024 },
{ MWId, 0xd6, 9, 1088 }, { MWId, 0xd7, 9, 1152 },
{ MWId, 0xd8, 9, 1216 }, { MWId, 0xd9, 9, 1280 },
{ MWId, 0xda, 9, 1344 }, { MWId, 0xdb, 9, 1408 },
{ MWId, 0x98, 9, 1472 }, { MWId, 0x99, 9, 1536 },
{ MWId, 0x9a, 9, 1600 }, { MWId, 0x18, 6, 1664 },
{ MWId, 0x9b, 9, 1728 }, { MWId, 0x00, 0, 0 }
}
#define MWId
Definition: compress.c:92

Definition at line 129 of file compress.c.

Referenced by HuffmanDecodeImage(), and HuffmanEncodeImage().

◆ TBTable

const HuffmanTable TBTable[]
static
Initial value:
=
{
{ TBId, 0x37, 10, 0 }, { TBId, 0x02, 3, 1 }, { TBId, 0x03, 2, 2 },
{ TBId, 0x02, 2, 3 }, { TBId, 0x03, 3, 4 }, { TBId, 0x03, 4, 5 },
{ TBId, 0x02, 4, 6 }, { TBId, 0x03, 5, 7 }, { TBId, 0x05, 6, 8 },
{ TBId, 0x04, 6, 9 }, { TBId, 0x04, 7, 10 }, { TBId, 0x05, 7, 11 },
{ TBId, 0x07, 7, 12 }, { TBId, 0x04, 8, 13 }, { TBId, 0x07, 8, 14 },
{ TBId, 0x18, 9, 15 }, { TBId, 0x17, 10, 16 }, { TBId, 0x18, 10, 17 },
{ TBId, 0x08, 10, 18 }, { TBId, 0x67, 11, 19 }, { TBId, 0x68, 11, 20 },
{ TBId, 0x6c, 11, 21 }, { TBId, 0x37, 11, 22 }, { TBId, 0x28, 11, 23 },
{ TBId, 0x17, 11, 24 }, { TBId, 0x18, 11, 25 }, { TBId, 0xca, 12, 26 },
{ TBId, 0xcb, 12, 27 }, { TBId, 0xcc, 12, 28 }, { TBId, 0xcd, 12, 29 },
{ TBId, 0x68, 12, 30 }, { TBId, 0x69, 12, 31 }, { TBId, 0x6a, 12, 32 },
{ TBId, 0x6b, 12, 33 }, { TBId, 0xd2, 12, 34 }, { TBId, 0xd3, 12, 35 },
{ TBId, 0xd4, 12, 36 }, { TBId, 0xd5, 12, 37 }, { TBId, 0xd6, 12, 38 },
{ TBId, 0xd7, 12, 39 }, { TBId, 0x6c, 12, 40 }, { TBId, 0x6d, 12, 41 },
{ TBId, 0xda, 12, 42 }, { TBId, 0xdb, 12, 43 }, { TBId, 0x54, 12, 44 },
{ TBId, 0x55, 12, 45 }, { TBId, 0x56, 12, 46 }, { TBId, 0x57, 12, 47 },
{ TBId, 0x64, 12, 48 }, { TBId, 0x65, 12, 49 }, { TBId, 0x52, 12, 50 },
{ TBId, 0x53, 12, 51 }, { TBId, 0x24, 12, 52 }, { TBId, 0x37, 12, 53 },
{ TBId, 0x38, 12, 54 }, { TBId, 0x27, 12, 55 }, { TBId, 0x28, 12, 56 },
{ TBId, 0x58, 12, 57 }, { TBId, 0x59, 12, 58 }, { TBId, 0x2b, 12, 59 },
{ TBId, 0x2c, 12, 60 }, { TBId, 0x5a, 12, 61 }, { TBId, 0x66, 12, 62 },
{ TBId, 0x67, 12, 63 }, { TBId, 0x00, 0, 0 }
}
#define TBId
Definition: compress.c:93

Definition at line 148 of file compress.c.

Referenced by HuffmanDecodeImage(), and HuffmanEncodeImage().

◆ TWTable

const HuffmanTable TWTable[]
static
Initial value:
=
{
{ TWId, 0x35, 8, 0 }, { TWId, 0x07, 6, 1 }, { TWId, 0x07, 4, 2 },
{ TWId, 0x08, 4, 3 }, { TWId, 0x0b, 4, 4 }, { TWId, 0x0c, 4, 5 },
{ TWId, 0x0e, 4, 6 }, { TWId, 0x0f, 4, 7 }, { TWId, 0x13, 5, 8 },
{ TWId, 0x14, 5, 9 }, { TWId, 0x07, 5, 10 }, { TWId, 0x08, 5, 11 },
{ TWId, 0x08, 6, 12 }, { TWId, 0x03, 6, 13 }, { TWId, 0x34, 6, 14 },
{ TWId, 0x35, 6, 15 }, { TWId, 0x2a, 6, 16 }, { TWId, 0x2b, 6, 17 },
{ TWId, 0x27, 7, 18 }, { TWId, 0x0c, 7, 19 }, { TWId, 0x08, 7, 20 },
{ TWId, 0x17, 7, 21 }, { TWId, 0x03, 7, 22 }, { TWId, 0x04, 7, 23 },
{ TWId, 0x28, 7, 24 }, { TWId, 0x2b, 7, 25 }, { TWId, 0x13, 7, 26 },
{ TWId, 0x24, 7, 27 }, { TWId, 0x18, 7, 28 }, { TWId, 0x02, 8, 29 },
{ TWId, 0x03, 8, 30 }, { TWId, 0x1a, 8, 31 }, { TWId, 0x1b, 8, 32 },
{ TWId, 0x12, 8, 33 }, { TWId, 0x13, 8, 34 }, { TWId, 0x14, 8, 35 },
{ TWId, 0x15, 8, 36 }, { TWId, 0x16, 8, 37 }, { TWId, 0x17, 8, 38 },
{ TWId, 0x28, 8, 39 }, { TWId, 0x29, 8, 40 }, { TWId, 0x2a, 8, 41 },
{ TWId, 0x2b, 8, 42 }, { TWId, 0x2c, 8, 43 }, { TWId, 0x2d, 8, 44 },
{ TWId, 0x04, 8, 45 }, { TWId, 0x05, 8, 46 }, { TWId, 0x0a, 8, 47 },
{ TWId, 0x0b, 8, 48 }, { TWId, 0x52, 8, 49 }, { TWId, 0x53, 8, 50 },
{ TWId, 0x54, 8, 51 }, { TWId, 0x55, 8, 52 }, { TWId, 0x24, 8, 53 },
{ TWId, 0x25, 8, 54 }, { TWId, 0x58, 8, 55 }, { TWId, 0x59, 8, 56 },
{ TWId, 0x5a, 8, 57 }, { TWId, 0x5b, 8, 58 }, { TWId, 0x4a, 8, 59 },
{ TWId, 0x4b, 8, 60 }, { TWId, 0x32, 8, 61 }, { TWId, 0x33, 8, 62 },
{ TWId, 0x34, 8, 63 }, { TWId, 0x00, 0, 0 }
}
#define TWId
Definition: compress.c:91

Definition at line 175 of file compress.c.

Referenced by HuffmanDecodeImage(), and HuffmanEncodeImage().