gl2gif.cpp File Reference

#include "MallocUtils.h"
#include "gl2gif.h"
#include <ctype.h>

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Classes
struct	box

Macros
#define	HASH_SIZE   20023
#define	ppm_hashpixel(p)   (((int)(p)&0x7fffffff) % HASH_SIZE)
#define	LARGE_LUM
#define	REP_AVERAGE_PIXELS
#define	BITS   12
#define	HSIZE   5003 /* 80% occupancy */
#define	TRUE   1
#define	FALSE   0
#define	ARGVAL()   (*++(*argv) || (--argc && *++argv))
#define	MAXCODE(n_bits)   (((code_int)1 << (n_bits)) - 1)
#define	HashTabOf(i)   htab[i]
#define	CodeTabOf(i)   codetab[i]
#define	tab_prefixof(i)   CodeTabOf(i)
#define	tab_suffixof(i)   ((char_type *)(htab))[i]
#define	de_stack   ((char_type *)&tab_suffixof((code_int)1 << BITS))
#define	FS_SCALE   1024
#define	MAXCOL2   32767

Typedefs
typedef colorhist_list *	colorhash_table
typedef struct box *	box_vector
typedef unsigned char	char_type
typedef int(*	ifunptr) (int, int)

Functions
static colorhash_table	ppm_alloccolorhash ()
static void	ppm_freecolorhash (colorhash_table cht)
static colorhash_table	ppm_computecolorhash (pixel **const pixels, const int cols, const int rows, const int maxcolors, int *const colorsP)
static int	ppm_addtocolorhash (colorhash_table cht, const pixel *const colorP, const int value)
static colorhist_vector	ppm_colorhashtocolorhist (const colorhash_table cht, const int maxcolors)
static colorhash_table	ppm_colorhisttocolorhash (const colorhist_vector chv, const int colors)
static colorhist_vector	ppm_computecolorhist (pixel **const pixels, const int cols, const int rows, const int maxcolors, int *const colorsP)
static int	ppm_lookupcolor (const colorhash_table cht, const pixel *const colorP)
static void	ppm_freecolorhist (colorhist_vector chv)
static int	colorstobpp (int colors)
static int	sqr (int x)
static int	closestcolor (pixel color)
static int	GetPixel (int x, int y)
static int	redcompare (const void *ch1, const void *ch2)
static int	greencompare (const void *ch1, const void *ch2)
static int	bluecompare (const void *ch1, const void *ch2)
static int	sumcompare (const void *b1, const void *b2)
static colorhist_vector	mediancut (colorhist_vector chv, int colors, int sum, pixval maxval, int newcolors)
static void	char_init ()
static void	flush_char ()
static void	char_out (int c)
static void	BumpPixel ()
static int	GIFNextPixel (ifunptr getpixel)
static void	output (code_int code)
static void	cl_hash (count_int hsize)
static void	cl_block ()
static void	compress (int init_bits, FILE *outfile, ifunptr ReadValue)
static void	Putword (int w, FILE *fp)
static void	GIFEncode (FILE *fp, int GWidth, int GHeight, int GInterlace, int Background, int Transparent, int BitsPerPixel, int Red[], int Green[], int Blue[], ifunptr GetPixel)
void	create_gif (FILE *outfile, PixelBuffer *buffer, int dither, int sort, int interlace, int transparency)

Variables
static int	static_red [MAX_GIFCOLORS]
static int	static_green [MAX_GIFCOLORS]
static int	static_blue [MAX_GIFCOLORS]
static int	static_perm [MAX_GIFCOLORS]
static int	static_permi [MAX_GIFCOLORS]
static int	static_nbcolors
static pixel **	static_pixels
static colorhash_table	static_cht
static int	g_init_bits
static FILE *	g_outfile
static int	Width
static int	Height
static int	curx
static int	cury
static long	CountDown
static int	Pass = 0
static int	Interlace
static int	n_bits
static int	maxbits = BITS
static code_int	maxcode
static code_int	maxmaxcode = (code_int)1 << BITS
static count_int	htab [HSIZE]
static unsigned short	codetab [HSIZE]
static code_int	hsize = HSIZE
static code_int	free_ent = 0
static int	clear_flg = 0
static long int	in_count = 1
static long int	out_count = 0
static int	ClearCode
static int	EOFCode
static int	a_count
static char	accum [256]
static unsigned long	cur_accum = 0
static int	cur_bits = 0
static unsigned long	masks []

Macro Definition Documentation

ARGVAL

#define ARGVAL

(

)

(*++(*argv) || (--argc && *++argv))

Definition at line 571 of file gl2gif.cpp.

BITS

#define BITS   12

Definition at line 553 of file gl2gif.cpp.

CodeTabOf

#define CodeTabOf

(

i

)

codetab[i]

Definition at line 584 of file gl2gif.cpp.

de_stack

#define de_stack   ((char_type *)&tab_suffixof((code_int)1 << BITS))

Definition at line 599 of file gl2gif.cpp.

FALSE

#define FALSE   0

Definition at line 556 of file gl2gif.cpp.

FS_SCALE

#define FS_SCALE   1024

Definition at line 1108 of file gl2gif.cpp.

HASH_SIZE

#define HASH_SIZE   20023

Definition at line 54 of file gl2gif.cpp.

HashTabOf

#define HashTabOf

(

i

)

htab[i]

Definition at line 583 of file gl2gif.cpp.

HSIZE

#define HSIZE   5003 /* 80% occupancy */

Definition at line 554 of file gl2gif.cpp.

LARGE_LUM

#define LARGE_LUM

Definition at line 305 of file gl2gif.cpp.

MAXCODE

#define MAXCODE

(

n_bits

)

(((code_int)1 << (n_bits)) - 1)

Definition at line 579 of file gl2gif.cpp.

MAXCOL2

#define MAXCOL2   32767

Definition at line 1109 of file gl2gif.cpp.

ppm_hashpixel

#define ppm_hashpixel

(

p

)

(((int)(p)&0x7fffffff) % HASH_SIZE)

Definition at line 55 of file gl2gif.cpp.

REP_AVERAGE_PIXELS

#define REP_AVERAGE_PIXELS

Definition at line 309 of file gl2gif.cpp.

tab_prefixof

#define tab_prefixof

(

i

)

CodeTabOf(i)

Definition at line 597 of file gl2gif.cpp.

tab_suffixof

#define tab_suffixof

(

i

)

((char_type *)(htab))[i]

Definition at line 598 of file gl2gif.cpp.

TRUE

#define TRUE   1

Definition at line 555 of file gl2gif.cpp.

Typedef Documentation

box_vector

typedef struct box* box_vector

Definition at line 310 of file gl2gif.cpp.

char_type

typedef unsigned char char_type

Definition at line 557 of file gl2gif.cpp.

colorhash_table

typedef colorhist_list* colorhash_table

Definition at line 73 of file gl2gif.cpp.

ifunptr

typedef int(* ifunptr) (int, int)

Definition at line 558 of file gl2gif.cpp.

Function Documentation

bluecompare()

static int bluecompare ( const void *  ch1, const void *  ch2  )

static

Definition at line 329 of file gl2gif.cpp.

Referenced by mediancut().

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BumpPixel()

static void BumpPixel ( )

static

Definition at line 654 of file gl2gif.cpp.

Referenced by GIFNextPixel().

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char_init()

static void char_init ( )

static

Definition at line 621 of file gl2gif.cpp.

Referenced by compress().

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char_out()

static void char_out ( int  c )

static

Definition at line 644 of file gl2gif.cpp.

Referenced by output().

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cl_block()

static void cl_block ( )

static

Definition at line 846 of file gl2gif.cpp.

Referenced by compress().

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cl_hash()

static void cl_hash ( count_int  hsize )

static

Definition at line 812 of file gl2gif.cpp.

Referenced by cl_block(), and compress().

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closestcolor()

static int closestcolor ( pixel  color )

static

Definition at line 268 of file gl2gif.cpp.

Referenced by create_gif(), and GetPixel().

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colorstobpp()

static int colorstobpp ( int  colors )

static

Definition at line 238 of file gl2gif.cpp.

Referenced by create_gif().

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compress()

static void compress ( int  init_bits, FILE *  outfile, ifunptr  ReadValue  )

static

Definition at line 856 of file gl2gif.cpp.

Referenced by GIFEncode().

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create_gif()

void create_gif	(	FILE *	outfile,
		PixelBuffer *	buffer,
		int	dither,
		int	sort,
		int	interlace,
		int	transparency
	)

Definition at line 1110 of file gl2gif.cpp.

Referenced by CreateOutputFile().

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flush_char()

static void flush_char ( )

static

Definition at line 631 of file gl2gif.cpp.

Referenced by char_out(), and output().

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GetPixel()

static int GetPixel ( int  x, int  y  )

static

Definition at line 289 of file gl2gif.cpp.

Referenced by create_gif(), and GIFEncode().

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GIFEncode()

static void GIFEncode ( FILE *  fp, int  GWidth, int  GHeight, int  GInterlace, int  Background, int  Transparent, int  BitsPerPixel, int  Red[], int  Green[], int  Blue[], ifunptr  GetPixel  )

static

Definition at line 948 of file gl2gif.cpp.

Referenced by create_gif().

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GIFNextPixel()

static int GIFNextPixel ( ifunptr  getpixel )

static

Definition at line 706 of file gl2gif.cpp.

Referenced by compress().

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greencompare()

static int greencompare ( const void *  ch1, const void *  ch2  )

static

Definition at line 323 of file gl2gif.cpp.

Referenced by mediancut().

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mediancut()

static colorhist_vector mediancut ( colorhist_vector  chv, int  colors, int  sum, pixval  maxval, int  newcolors  )

static

Definition at line 346 of file gl2gif.cpp.

Referenced by create_gif().

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output()

static void output ( code_int  code )

static

Definition at line 743 of file gl2gif.cpp.

Referenced by cl_block(), compress(), Octree_SearchAll(), and GMSH_SpanningTreePlugin::run().

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ppm_addtocolorhash()

static int ppm_addtocolorhash ( colorhash_table  cht, const pixel *const  colorP, const int  value  )

static

Definition at line 145 of file gl2gif.cpp.

Referenced by closestcolor(), and create_gif().

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ppm_alloccolorhash()

static colorhash_table ppm_alloccolorhash ( )

static

Definition at line 83 of file gl2gif.cpp.

Referenced by create_gif(), ppm_colorhisttocolorhash(), and ppm_computecolorhash().

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ppm_colorhashtocolorhist()

static colorhist_vector ppm_colorhashtocolorhist ( const colorhash_table  cht, const int  maxcolors  )

static

Definition at line 160 of file gl2gif.cpp.

Referenced by ppm_computecolorhist().

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ppm_colorhisttocolorhash()

static colorhash_table ppm_colorhisttocolorhash ( const colorhist_vector  chv, const int  colors  )

static

Definition at line 182 of file gl2gif.cpp.

Referenced by create_gif().

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ppm_computecolorhash()

static colorhash_table ppm_computecolorhash ( pixel **const  pixels, const int  cols, const int  rows, const int  maxcolors, int *const  colorsP  )

static

Definition at line 108 of file gl2gif.cpp.

Referenced by ppm_computecolorhist().

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ppm_computecolorhist()

static colorhist_vector ppm_computecolorhist ( pixel **const  pixels, const int  cols, const int  rows, const int  maxcolors, int *const  colorsP  )

static

Definition at line 209 of file gl2gif.cpp.

Referenced by create_gif().

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ppm_freecolorhash()

static void ppm_freecolorhash ( colorhash_table  cht )

static

Definition at line 95 of file gl2gif.cpp.

Referenced by create_gif(), ppm_computecolorhash(), and ppm_computecolorhist().

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ppm_freecolorhist()

static void ppm_freecolorhist ( colorhist_vector  chv )

static

Definition at line 236 of file gl2gif.cpp.

Referenced by create_gif().

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ppm_lookupcolor()

static int ppm_lookupcolor ( const colorhash_table  cht, const pixel *const  colorP  )

static

Definition at line 224 of file gl2gif.cpp.

Referenced by create_gif(), and GetPixel().

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Putword()

static void Putword ( int  w, FILE *  fp  )

static

Definition at line 942 of file gl2gif.cpp.

Referenced by GIFEncode().

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redcompare()

static int redcompare ( const void *  ch1, const void *  ch2  )

static

Definition at line 317 of file gl2gif.cpp.

Referenced by mediancut().

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sqr()

static int sqr ( int  x )

static

Definition at line 266 of file gl2gif.cpp.

Referenced by closestcolor(), JacobianBasis::getMetricMinAndGradients(), insertVerticesInRegion(), MeshDelaunayVolume(), and STensor3::norm2().

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sumcompare()

static int sumcompare ( const void *  b1, const void *  b2  )

static

Definition at line 335 of file gl2gif.cpp.

Referenced by mediancut().

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Variable Documentation

a_count

int a_count

static

Definition at line 616 of file gl2gif.cpp.

Referenced by char_init(), char_out(), flush_char(), RTFileStream::ReadArray(), and RTFileStream::WriteArray().

accum

char accum[256]

static

Definition at line 626 of file gl2gif.cpp.

Referenced by char_out(), and flush_char().

clear_flg

int clear_flg = 0

static

Definition at line 606 of file gl2gif.cpp.

Referenced by cl_block(), compress(), and output().

ClearCode

int ClearCode

static

Definition at line 610 of file gl2gif.cpp.

Referenced by cl_block(), and compress().

codetab

unsigned short codetab[HSIZE]

static

Definition at line 581 of file gl2gif.cpp.

CountDown

long CountDown

static

Definition at line 564 of file gl2gif.cpp.

Referenced by GIFEncode(), and GIFNextPixel().

cur_accum

unsigned long cur_accum = 0

static

Definition at line 736 of file gl2gif.cpp.

Referenced by GIFEncode(), and output().

cur_bits

int cur_bits = 0

static

Definition at line 737 of file gl2gif.cpp.

Referenced by GIFEncode(), and output().

curx

int curx

static

Definition at line 563 of file gl2gif.cpp.

Referenced by BumpPixel(), GIFEncode(), and GIFNextPixel().

cury

int cury

static

Definition at line 563 of file gl2gif.cpp.

Referenced by BumpPixel(), GIFEncode(), and GIFNextPixel().

EOFCode

int EOFCode

static

Definition at line 611 of file gl2gif.cpp.

Referenced by compress(), and output().

free_ent

code_int free_ent = 0

static

Definition at line 600 of file gl2gif.cpp.

Referenced by cl_block(), compress(), GIFEncode(), and output().

g_init_bits

int g_init_bits

static

Definition at line 560 of file gl2gif.cpp.

Referenced by compress(), and output().

g_outfile

FILE* g_outfile

static

Definition at line 561 of file gl2gif.cpp.

Referenced by compress(), flush_char(), and output().

Height

int Height

static

Definition at line 562 of file gl2gif.cpp.

Referenced by BumpPixel(), and GIFEncode().

hsize

code_int hsize = HSIZE

static

Definition at line 585 of file gl2gif.cpp.

Referenced by cl_block(), cl_hash(), and compress().

htab

count_int htab[HSIZE]

static

Definition at line 580 of file gl2gif.cpp.

Referenced by cl_hash().

in_count

long int in_count = 1

static

Definition at line 608 of file gl2gif.cpp.

Referenced by compress().

Interlace

int Interlace

static

Definition at line 566 of file gl2gif.cpp.

Referenced by BumpPixel(), and GIFEncode().

masks

unsigned long masks[]

static

Initial value:

= {0x0000, 0x0001, 0x0003, 0x0007, 0x000F, 0x001F,
                                0x003F, 0x007F, 0x00FF, 0x01FF, 0x03FF, 0x07FF,
                                0x0FFF, 0x1FFF, 0x3FFF, 0x7FFF, 0xFFFF}

Definition at line 739 of file gl2gif.cpp.

Referenced by output().

maxbits

int maxbits = BITS

static

Definition at line 573 of file gl2gif.cpp.

Referenced by compress(), and output().

maxcode

code_int maxcode

static

Definition at line 574 of file gl2gif.cpp.

Referenced by compress(), and output().

maxmaxcode

code_int maxmaxcode = (code_int)1 << BITS

static

Definition at line 575 of file gl2gif.cpp.

Referenced by compress(), and output().

n_bits

int n_bits

static

Definition at line 572 of file gl2gif.cpp.

Referenced by compress(), and output().

out_count

long int out_count = 0

static

Definition at line 609 of file gl2gif.cpp.

Referenced by compress().

Pass

int Pass = 0

static

Definition at line 565 of file gl2gif.cpp.

Referenced by BumpPixel(), and GIFEncode().

static_blue

int static_blue[MAX_GIFCOLORS]

static

Definition at line 77 of file gl2gif.cpp.

Referenced by closestcolor(), and create_gif().

static_cht

colorhash_table static_cht

static

Definition at line 81 of file gl2gif.cpp.

Referenced by closestcolor(), create_gif(), and GetPixel().

static_green

int static_green[MAX_GIFCOLORS]

static

Definition at line 76 of file gl2gif.cpp.

Referenced by closestcolor(), and create_gif().

static_nbcolors

int static_nbcolors

static

Definition at line 79 of file gl2gif.cpp.

Referenced by closestcolor(), and create_gif().

static_perm

int static_perm[MAX_GIFCOLORS]

static

Definition at line 78 of file gl2gif.cpp.

Referenced by create_gif(), and GetPixel().

static_permi

int static_permi[MAX_GIFCOLORS]

static

Definition at line 78 of file gl2gif.cpp.

Referenced by closestcolor(), and create_gif().

static_pixels

pixel** static_pixels

static

Definition at line 80 of file gl2gif.cpp.

Referenced by create_gif(), and GetPixel().

static_red

int static_red[MAX_GIFCOLORS]

static

Definition at line 75 of file gl2gif.cpp.

Referenced by closestcolor(), and create_gif().

Width

int Width

static

Definition at line 562 of file gl2gif.cpp.

Referenced by BumpPixel(), and GIFEncode().