aboutsummaryrefslogtreecommitdiff
path: root/graphics/php5-gd/files/patch-libgd::gd_lzw_out.c
diff options
context:
space:
mode:
Diffstat (limited to 'graphics/php5-gd/files/patch-libgd::gd_lzw_out.c')
-rw-r--r--graphics/php5-gd/files/patch-libgd::gd_lzw_out.c939
1 files changed, 0 insertions, 939 deletions
diff --git a/graphics/php5-gd/files/patch-libgd::gd_lzw_out.c b/graphics/php5-gd/files/patch-libgd::gd_lzw_out.c
deleted file mode 100644
index ffe14703269d..000000000000
--- a/graphics/php5-gd/files/patch-libgd::gd_lzw_out.c
+++ /dev/null
@@ -1,939 +0,0 @@
---- libgd/gd_lzw_out.c.orig Sat Jun 28 15:47:56 2003
-+++ libgd/gd_lzw_out.c Sat Jun 28 16:01:04 2003
-@@ -0,0 +1,936 @@
-+#ifdef HAVE_MALLOC_H
-+ #include <malloc.h>
-+#endif
-+#include <stdio.h>
-+#include <math.h>
-+#include <string.h>
-+#include <stdlib.h>
-+#include "gd.h"
-+
-+/* Code drawn from ppmtogif.c, from the pbmplus package
-+**
-+** Based on GIFENCOD by David Rowley <mgardi@watdscu.waterloo.edu>. A
-+** Lempel-Zim compression based on "compress".
-+**
-+** Modified by Marcel Wijkstra <wijkstra@fwi.uva.nl>
-+**
-+** Copyright (C) 1989 by Jef Poskanzer.
-+**
-+** Permission to use, copy, modify, and distribute this software and its
-+** documentation for any purpose and without fee is hereby granted, provided
-+** that the above copyright notice appear in all copies and that both that
-+** copyright notice and this permission notice appear in supporting
-+** documentation. This software is provided "as is" without express or
-+** implied warranty.
-+**
-+** The Graphics Interchange Format(c) is the Copyright property of
-+** CompuServe Incorporated. GIF(sm) is a Service Mark property of
-+** CompuServe Incorporated.
-+*/
-+
-+/*
-+ * a code_int must be able to hold 2**GIFBITS values of type int, and also -1
-+ */
-+typedef int code_int;
-+
-+#ifdef SIGNED_COMPARE_SLOW
-+typedef unsigned long int count_int;
-+typedef unsigned short int count_short;
-+#else /*SIGNED_COMPARE_SLOW*/
-+typedef long int count_int;
-+#endif /*SIGNED_COMPARE_SLOW*/
-+
-+static int colorstobpp(int colors);
-+static void BumpPixel (void);
-+static int GIFNextPixel (gdImagePtr im);
-+static void GIFEncode (gdIOCtx *fp, int GWidth, int GHeight, int GInterlace, int Background, int Transparent, int BitsPerPixel, int *Red, int *Green, int *Blue, gdImagePtr im);
-+static void GIFAnimEncode(gdIOCtx *fp, int IWidth, int IHeight, int LeftOfs, int TopOfs, int GInterlace, int Transparent, int Delay, int Disposal, int BitsPerPixel, int *Red, int *Green, int *Blue, gdImagePtr im);
-+/*static void Putword (int w, gdIOCtx *fp); */
-+static void compress (int init_bits, gdIOCtx *outfile, gdImagePtr im);
-+static void output (code_int code);
-+static void cl_block (void);
-+static void cl_hash (register count_int hsize);
-+static void char_init (void);
-+static void char_out (int c);
-+static void flush_char (void);
-+/* Allows for reuse */
-+static void init_statics(void);
-+
-+void gdImageLzwCtx(gdImagePtr im, gdIOCtx *out)
-+{
-+ int interlace, transparent, BitsPerPixel;
-+
-+ interlace = im->interlace;
-+ transparent = im->transparent;
-+
-+ BitsPerPixel = colorstobpp(im->colorsTotal);
-+ /* Clear any old values in statics strewn through the GIF code */
-+ init_statics();
-+ /* All set, let's do it. */
-+ GIFEncode(
-+ out, im->sx, im->sy, interlace, 0, transparent, BitsPerPixel,
-+ im->red, im->green, im->blue, im);
-+}
-+
-+void gdImageLzw(gdImagePtr im, FILE *outFile)
-+{
-+ gdIOCtx *out = gdNewFileCtx(outFile);
-+ gdImageLzwCtx(im, out);
-+ out->gd_free(out);
-+}
-+
-+void* gdImageLzwPtr(gdImagePtr im, int *size)
-+{
-+ void *rv;
-+ gdIOCtx *out = gdNewDynamicCtx(2048, NULL);
-+ gdImageLzwCtx(im, out);
-+ rv = gdDPExtractData(out,size);
-+ out->gd_free(out);
-+ return rv;
-+}
-+
-+void gdImageLzwAnimAddCtx(gdImagePtr im, gdIOCtx *out, int LocalCM, int LeftOfs, int TopOfs, int Delay, int Disposal)
-+{
-+ int interlace, transparent, BitsPerPixel;
-+
-+ interlace = im->interlace;
-+ transparent = im->transparent;
-+
-+ BitsPerPixel = colorstobpp(im->colorsTotal);
-+ /* Clear any old values in statics strewn through the GIF code */
-+ init_statics();
-+ /* All set, let's do it. */
-+ GIFAnimEncode(
-+ out, im->sx, im->sy, LeftOfs, TopOfs, interlace, transparent,
-+ Delay, Disposal, BitsPerPixel,
-+ LocalCM > 0 ? im->red : 0, im->green, im->blue, im);
-+}
-+
-+void gdImageLzwAnimAdd(gdImagePtr im, FILE *outFile, int LocalCM, int LeftOfs, int TopOfs, int Delay, int Disposal)
-+{
-+ gdIOCtx *out = gdNewFileCtx(outFile);
-+ gdImageLzwAnimAddCtx(im, out, LocalCM, LeftOfs, TopOfs, Delay, Disposal);
-+ out->gd_free(out);
-+}
-+
-+void* gdImageLzwAnimAddPtr(gdImagePtr im, int *size, int LocalCM, int LeftOfs, int TopOfs, int Delay, int Disposal)
-+{
-+ void *rv;
-+ gdIOCtx *out = gdNewDynamicCtx(2048, NULL);
-+ gdImageLzwAnimAddCtx(im, out, LocalCM, LeftOfs, TopOfs, Delay, Disposal);
-+ rv = gdDPExtractData(out,size);
-+ out->gd_free(out);
-+ return rv;
-+}
-+
-+
-+
-+static int
-+colorstobpp(int colors)
-+{
-+ int bpp = 0;
-+
-+ if ( colors <= 2 )
-+ bpp = 1;
-+ else if ( colors <= 4 )
-+ bpp = 2;
-+ else if ( colors <= 8 )
-+ bpp = 3;
-+ else if ( colors <= 16 )
-+ bpp = 4;
-+ else if ( colors <= 32 )
-+ bpp = 5;
-+ else if ( colors <= 64 )
-+ bpp = 6;
-+ else if ( colors <= 128 )
-+ bpp = 7;
-+ else if ( colors <= 256 )
-+ bpp = 8;
-+ return bpp;
-+ }
-+
-+/*****************************************************************************
-+ *
-+ * GIFENCODE.C - GIF Image compression interface
-+ *
-+ * GIFEncode( FName, GHeight, GWidth, GInterlace, Background, Transparent,
-+ * BitsPerPixel, Red, Green, Blue, gdImagePtr )
-+ *
-+ *****************************************************************************/
-+
-+#define TRUE 1
-+#define FALSE 0
-+
-+static int Width, Height;
-+static int curx, cury;
-+static long CountDown;
-+static int Pass = 0;
-+static int Interlace;
-+
-+/*
-+ * Bump the 'curx' and 'cury' to point to the next pixel
-+ */
-+static void
-+BumpPixel(void)
-+{
-+ /*
-+ * Bump the current X position
-+ */
-+ ++curx;
-+
-+ /*
-+ * If we are at the end of a scan line, set curx back to the beginning
-+ * If we are interlaced, bump the cury to the appropriate spot,
-+ * otherwise, just increment it.
-+ */
-+ if( curx == Width ) {
-+ curx = 0;
-+
-+ if( !Interlace )
-+ ++cury;
-+ else {
-+ switch( Pass ) {
-+
-+ case 0:
-+ cury += 8;
-+ if( cury >= Height ) {
-+ ++Pass;
-+ cury = 4;
-+ }
-+ break;
-+
-+ case 1:
-+ cury += 8;
-+ if( cury >= Height ) {
-+ ++Pass;
-+ cury = 2;
-+ }
-+ break;
-+
-+ case 2:
-+ cury += 4;
-+ if( cury >= Height ) {
-+ ++Pass;
-+ cury = 1;
-+ }
-+ break;
-+
-+ case 3:
-+ cury += 2;
-+ break;
-+ }
-+ }
-+ }
-+}
-+
-+/*
-+ * Return the next pixel from the image
-+ */
-+static int
-+GIFNextPixel(gdImagePtr im)
-+{
-+ int r;
-+
-+ if( CountDown == 0 )
-+ return EOF;
-+
-+ --CountDown;
-+
-+ r = gdImageGetPixel(im, curx, cury);
-+
-+ BumpPixel();
-+
-+ return r;
-+}
-+
-+/* public */
-+
-+static void
-+GIFEncode(gdIOCtx *fp, int GWidth, int GHeight, int GInterlace, int Background, int Transparent, int BitsPerPixel, int *Red, int *Green, int *Blue, gdImagePtr im)
-+{
-+ int B;
-+ int RWidth, RHeight;
-+ int LeftOfs, TopOfs;
-+ int Resolution;
-+ int ColorMapSize;
-+ int InitCodeSize;
-+ int i;
-+
-+ Interlace = GInterlace;
-+
-+ ColorMapSize = 1 << BitsPerPixel;
-+
-+ RWidth = Width = GWidth;
-+ RHeight = Height = GHeight;
-+ LeftOfs = TopOfs = 0;
-+
-+ Resolution = BitsPerPixel;
-+
-+ /*
-+ * Calculate number of bits we are expecting
-+ */
-+ CountDown = (long)Width * (long)Height;
-+
-+ /*
-+ * Indicate which pass we are on (if interlace)
-+ */
-+ Pass = 0;
-+
-+ /*
-+ * The initial code size
-+ */
-+ if( BitsPerPixel <= 1 )
-+ InitCodeSize = 2;
-+ else
-+ InitCodeSize = BitsPerPixel;
-+
-+ /*
-+ * Set up the current x and y position
-+ */
-+ curx = cury = 0;
-+
-+ /*
-+ * Write the Magic header
-+ */
-+ gdPutBuf( Transparent < 0 ? "GIF87a" : "GIF89a", 6, fp );
-+
-+ /*
-+ * Write out the screen width and height
-+ */
-+ Putword( RWidth, fp );
-+ Putword( RHeight, fp );
-+
-+ /*
-+ * Indicate that there is a global colour map
-+ */
-+ B = 0x80; /* Yes, there is a color map */
-+
-+ /*
-+ * OR in the resolution
-+ */
-+ B |= (Resolution - 1) << 5;
-+
-+ /*
-+ * OR in the Bits per Pixel
-+ */
-+ B |= (BitsPerPixel - 1);
-+
-+ /*
-+ * Write it out
-+ */
-+ gdPutC( B, fp );
-+
-+ /*
-+ * Write out the Background colour
-+ */
-+ gdPutC( Background, fp );
-+
-+ /*
-+ * Byte of 0's (future expansion)
-+ */
-+ gdPutC( 0, fp );
-+
-+ /*
-+ * Write out the Global Colour Map
-+ */
-+ for( i=0; i<ColorMapSize; ++i ) {
-+ gdPutC( Red[i], fp );
-+ gdPutC( Green[i], fp );
-+ gdPutC( Blue[i], fp );
-+ }
-+
-+ /*
-+ * Write out extension for transparent colour index, if necessary.
-+ */
-+ if ( Transparent >= 0 ) {
-+ gdPutC( '!', fp );
-+ gdPutC( 0xf9, fp );
-+ gdPutC( 4, fp );
-+ gdPutC( 1, fp );
-+ gdPutC( 0, fp );
-+ gdPutC( 0, fp );
-+ gdPutC( (unsigned char) Transparent, fp );
-+ gdPutC( 0, fp );
-+ }
-+
-+ /*
-+ * Write an Image separator
-+ */
-+ gdPutC( ',', fp );
-+
-+ /*
-+ * Write the Image header
-+ */
-+
-+ Putword( LeftOfs, fp );
-+ Putword( TopOfs, fp );
-+ Putword( Width, fp );
-+ Putword( Height, fp );
-+
-+ /*
-+ * Write out whether or not the image is interlaced
-+ */
-+ if( Interlace )
-+ gdPutC( 0x40, fp );
-+ else
-+ gdPutC( 0x00, fp );
-+
-+ /*
-+ * Write out the initial code size
-+ */
-+ gdPutC( InitCodeSize, fp );
-+
-+ /*
-+ * Go and actually compress the data
-+ */
-+ compress( InitCodeSize+1, fp, im );
-+
-+ /*
-+ * Write out a Zero-length packet (to end the series)
-+ */
-+ gdPutC( 0, fp );
-+
-+ /*
-+ * Write the GIF file terminator
-+ */
-+ gdPutC( ';', fp );
-+}
-+
-+static void
-+GIFAnimEncode(gdIOCtx *fp, int IWidth, int IHeight, int LeftOfs, int TopOfs, int GInterlace, int Transparent, int Delay, int Disposal, int BitsPerPixel, int *Red, int *Green, int *Blue, gdImagePtr im)
-+{
-+ int ColorMapSize;
-+ int InitCodeSize;
-+ int i;
-+
-+ if (LeftOfs < 0) LeftOfs = 0;
-+ if (TopOfs < 0) TopOfs = 0;
-+ if (Delay < 0) Delay = 100;
-+ if (Disposal < 0) Disposal = 2;
-+
-+ Interlace = GInterlace;
-+
-+ ColorMapSize = 1 << BitsPerPixel;
-+
-+ Width = IWidth;
-+ Height = IHeight;
-+
-+ /*
-+ * Calculate number of bits we are expecting
-+ */
-+ CountDown = (long)Width * (long)Height;
-+
-+ /*
-+ * Indicate which pass we are on (if interlace)
-+ */
-+ Pass = 0;
-+
-+ /*
-+ * The initial code size
-+ */
-+ if( BitsPerPixel <= 1 )
-+ InitCodeSize = 2;
-+ else
-+ InitCodeSize = BitsPerPixel;
-+
-+ /*
-+ * Set up the current x and y position
-+ */
-+ curx = cury = 0;
-+
-+ /*
-+ * Write out extension for image animation and looping
-+ */
-+ gdPutC( '!', fp );
-+ gdPutC( 0xf9, fp );
-+ gdPutC( 4, fp );
-+ gdPutC( (Transparent >= 0 ? 1 : 0)
-+ | (Disposal << 2), fp );
-+ gdPutC( (unsigned char)(Delay & 255), fp );
-+ gdPutC( (unsigned char)((Delay >> 8) & 255), fp );
-+ gdPutC( (unsigned char) Transparent, fp );
-+ gdPutC( 0, fp );
-+
-+ /*
-+ * Write an Image separator
-+ */
-+ gdPutC( ',', fp );
-+
-+ /*
-+ * Write the Image header
-+ */
-+
-+ Putword( LeftOfs, fp );
-+ Putword( TopOfs, fp );
-+ Putword( Width, fp );
-+ Putword( Height, fp );
-+
-+ /*
-+ * Write out whether or not the image is interlaced
-+ * and if it includes local colour map.
-+ */
-+ gdPutC( (Interlace ? 0x40 : 0)
-+ | (Red ? 0x80 : 0)
-+ | (Red ? BitsPerPixel - 1 : 0), fp );
-+
-+ /*
-+ * Write out the Local Colour Map
-+ */
-+ if (Red)
-+ for( i=0; i<ColorMapSize; ++i ) {
-+ gdPutC( Red[i], fp );
-+ gdPutC( Green[i], fp );
-+ gdPutC( Blue[i], fp );
-+ }
-+
-+ /*
-+ * Write out the initial code size
-+ */
-+ gdPutC( InitCodeSize, fp );
-+
-+ /*
-+ * Go and actually compress the data
-+ */
-+ compress( InitCodeSize+1, fp, im );
-+
-+ /*
-+ * Write out a Zero-length packet (to end the series)
-+ */
-+ gdPutC( 0, fp );
-+}
-+
-+/* */
-+/* * Write out a word to the GIF file */
-+/* */
-+/*static void */
-+/*Putword(int w, FILE *fp) */
-+/*{ */
-+/* fputc( w & 0xff, fp ); */
-+/* fputc( (w / 256) & 0xff, fp ); */
-+/*} */
-+
-+
-+/***************************************************************************
-+ *
-+ * GIFCOMPR.C - GIF Image compression routines
-+ *
-+ * Lempel-Ziv compression based on 'compress'. GIF modifications by
-+ * David Rowley (mgardi@watdcsu.waterloo.edu)
-+ *
-+ ***************************************************************************/
-+
-+/*
-+ * General DEFINEs
-+ */
-+
-+#define GIFBITS 12
-+
-+#define HSIZE 5003 /* 80% occupancy */
-+
-+#ifdef NO_UCHAR
-+ typedef char char_type;
-+#else /*NO_UCHAR*/
-+ typedef unsigned char char_type;
-+#endif /*NO_UCHAR*/
-+
-+/*
-+ *
-+ * GIF Image compression - modified 'compress'
-+ *
-+ * Based on: compress.c - File compression ala IEEE Computer, June 1984.
-+ *
-+ * By Authors: Spencer W. Thomas (decvax!harpo!utah-cs!utah-gr!thomas)
-+ * Jim McKie (decvax!mcvax!jim)
-+ * Steve Davies (decvax!vax135!petsd!peora!srd)
-+ * Ken Turkowski (decvax!decwrl!turtlevax!ken)
-+ * James A. Woods (decvax!ihnp4!ames!jaw)
-+ * Joe Orost (decvax!vax135!petsd!joe)
-+ *
-+ */
-+#include <ctype.h>
-+
-+#define ARGVAL() (*++(*argv) || (--argc && *++argv))
-+
-+static int n_bits; /* number of bits/code */
-+static int maxbits = GIFBITS; /* user settable max # bits/code */
-+static code_int maxcode; /* maximum code, given n_bits */
-+static code_int maxmaxcode = (code_int)1 << GIFBITS; /* should NEVER generate this code */
-+#ifdef COMPATIBLE /* But wrong! */
-+# define MAXCODE(n_bits) ((code_int) 1 << (n_bits) - 1)
-+#else /*COMPATIBLE*/
-+# define MAXCODE(n_bits) (((code_int) 1 << (n_bits)) - 1)
-+#endif /*COMPATIBLE*/
-+
-+static count_int htab [HSIZE];
-+static unsigned short codetab [HSIZE];
-+#define HashTabOf(i) htab[i]
-+#define CodeTabOf(i) codetab[i]
-+
-+static code_int hsize = HSIZE; /* for dynamic table sizing */
-+
-+/*
-+ * To save much memory, we overlay the table used by compress() with those
-+ * used by decompress(). The tab_prefix table is the same size and type
-+ * as the codetab. The tab_suffix table needs 2**GIFBITS characters. We
-+ * get this from the beginning of htab. The output stack uses the rest
-+ * of htab, and contains characters. There is plenty of room for any
-+ * possible stack (stack used to be 8000 characters).
-+ */
-+
-+#define tab_prefixof(i) CodeTabOf(i)
-+#define tab_suffixof(i) ((char_type*)(htab))[i]
-+#define de_stack ((char_type*)&tab_suffixof((code_int)1<<GIFBITS))
-+
-+static code_int free_ent = 0; /* first unused entry */
-+
-+/*
-+ * block compression parameters -- after all codes are used up,
-+ * and compression rate changes, start over.
-+ */
-+static int clear_flg = 0;
-+
-+static int offset;
-+static long int in_count = 1; /* length of input */
-+static long int out_count = 0; /* # of codes output (for debugging) */
-+
-+/*
-+ * compress stdin to stdout
-+ *
-+ * Algorithm: use open addressing double hashing (no chaining) on the
-+ * prefix code / next character combination. We do a variant of Knuth's
-+ * algorithm D (vol. 3, sec. 6.4) along with G. Knott's relatively-prime
-+ * secondary probe. Here, the modular division first probe is gives way
-+ * to a faster exclusive-or manipulation. Also do block compression with
-+ * an adaptive reset, whereby the code table is cleared when the compression
-+ * ratio decreases, but after the table fills. The variable-length output
-+ * codes are re-sized at this point, and a special CLEAR code is generated
-+ * for the decompressor. Late addition: construct the table according to
-+ * file size for noticeable speed improvement on small files. Please direct
-+ * questions about this implementation to ames!jaw.
-+ */
-+
-+static int g_init_bits;
-+static gdIOCtx* g_outfile;
-+
-+static int ClearCode;
-+static int EOFCode;
-+
-+static void
-+compress(int init_bits, gdIOCtx *outfile, gdImagePtr im)
-+{
-+ register long fcode;
-+ register code_int i /* = 0 */;
-+ register int c;
-+ register code_int ent;
-+ register code_int disp;
-+ register code_int hsize_reg;
-+ register int hshift;
-+
-+ /*
-+ * Set up the globals: g_init_bits - initial number of bits
-+ * g_outfile - pointer to output file
-+ */
-+ g_init_bits = init_bits;
-+ g_outfile = outfile;
-+
-+ /*
-+ * Set up the necessary values
-+ */
-+ offset = 0;
-+ out_count = 0;
-+ clear_flg = 0;
-+ in_count = 1;
-+ maxcode = MAXCODE(n_bits = g_init_bits);
-+
-+ ClearCode = (1 << (init_bits - 1));
-+ EOFCode = ClearCode + 1;
-+ free_ent = ClearCode + 2;
-+
-+ char_init();
-+
-+ ent = GIFNextPixel( im );
-+
-+ hshift = 0;
-+ for ( fcode = (long) hsize; fcode < 65536L; fcode *= 2L )
-+ ++hshift;
-+ hshift = 8 - hshift; /* set hash code range bound */
-+
-+ hsize_reg = hsize;
-+ cl_hash( (count_int) hsize_reg); /* clear hash table */
-+
-+ output( (code_int)ClearCode );
-+
-+#ifdef SIGNED_COMPARE_SLOW
-+ while ( (c = GIFNextPixel( im )) != (unsigned) EOF ) {
-+#else /*SIGNED_COMPARE_SLOW*/
-+ while ( (c = GIFNextPixel( im )) != EOF ) { /* } */
-+#endif /*SIGNED_COMPARE_SLOW*/
-+
-+ ++in_count;
-+
-+ fcode = (long) (((long) c << maxbits) + ent);
-+ i = (((code_int)c << hshift) ^ ent); /* xor hashing */
-+
-+ if ( HashTabOf (i) == fcode ) {
-+ ent = CodeTabOf (i);
-+ continue;
-+ } else if ( (long)HashTabOf (i) < 0 ) /* empty slot */
-+ goto nomatch;
-+ disp = hsize_reg - i; /* secondary hash (after G. Knott) */
-+ if ( i == 0 )
-+ disp = 1;
-+probe:
-+ if ( (i -= disp) < 0 )
-+ i += hsize_reg;
-+
-+ if ( HashTabOf (i) == fcode ) {
-+ ent = CodeTabOf (i);
-+ continue;
-+ }
-+ if ( (long)HashTabOf (i) > 0 )
-+ goto probe;
-+nomatch:
-+ output ( (code_int) ent );
-+ ++out_count;
-+ ent = c;
-+#ifdef SIGNED_COMPARE_SLOW
-+ if ( (unsigned) free_ent < (unsigned) maxmaxcode) {
-+#else /*SIGNED_COMPARE_SLOW*/
-+ if ( free_ent < maxmaxcode ) { /* } */
-+#endif /*SIGNED_COMPARE_SLOW*/
-+ CodeTabOf (i) = free_ent++; /* code -> hashtable */
-+ HashTabOf (i) = fcode;
-+ } else
-+ cl_block();
-+ }
-+ /*
-+ * Put out the final code.
-+ */
-+ output( (code_int)ent );
-+ ++out_count;
-+ output( (code_int) EOFCode );
-+}
-+
-+/*****************************************************************
-+ * TAG( output )
-+ *
-+ * Output the given code.
-+ * Inputs:
-+ * code: A n_bits-bit integer. If == -1, then EOF. This assumes
-+ * that n_bits =< (long)wordsize - 1.
-+ * Outputs:
-+ * Outputs code to the file.
-+ * Assumptions:
-+ * Chars are 8 bits long.
-+ * Algorithm:
-+ * Maintain a GIFBITS character long buffer (so that 8 codes will
-+ * fit in it exactly). Use the VAX insv instruction to insert each
-+ * code in turn. When the buffer fills up empty it and start over.
-+ */
-+
-+static unsigned long cur_accum = 0;
-+static int cur_bits = 0;
-+
-+static unsigned long masks[] = { 0x0000, 0x0001, 0x0003, 0x0007, 0x000F,
-+ 0x001F, 0x003F, 0x007F, 0x00FF,
-+ 0x01FF, 0x03FF, 0x07FF, 0x0FFF,
-+ 0x1FFF, 0x3FFF, 0x7FFF, 0xFFFF };
-+
-+static void
-+output(code_int code)
-+{
-+ cur_accum &= masks[ cur_bits ];
-+
-+ if( cur_bits > 0 )
-+ cur_accum |= ((long)code << cur_bits);
-+ else
-+ cur_accum = code;
-+
-+ cur_bits += n_bits;
-+
-+ while( cur_bits >= 8 ) {
-+ char_out( (unsigned int)(cur_accum & 0xff) );
-+ cur_accum >>= 8;
-+ cur_bits -= 8;
-+ }
-+
-+ /*
-+ * If the next entry is going to be too big for the code size,
-+ * then increase it, if possible.
-+ */
-+ if ( free_ent > maxcode || clear_flg ) {
-+
-+ if( clear_flg ) {
-+
-+ maxcode = MAXCODE (n_bits = g_init_bits);
-+ clear_flg = 0;
-+
-+ } else {
-+
-+ ++n_bits;
-+ if ( n_bits == maxbits )
-+ maxcode = maxmaxcode;
-+ else
-+ maxcode = MAXCODE(n_bits);
-+ }
-+ }
-+
-+ if( code == EOFCode ) {
-+ /*
-+ * At EOF, write the rest of the buffer.
-+ */
-+ while( cur_bits > 0 ) {
-+ char_out( (unsigned int)(cur_accum & 0xff) );
-+ cur_accum >>= 8;
-+ cur_bits -= 8;
-+ }
-+
-+ flush_char();
-+
-+/* fflush( g_outfile ); */
-+/* */
-+/* if( ferror( g_outfile ) ) */
-+/* return; */
-+ }
-+}
-+
-+/*
-+ * Clear out the hash table
-+ */
-+static void
-+cl_block (void) /* table clear for block compress */
-+{
-+
-+ cl_hash ( (count_int) hsize );
-+ free_ent = ClearCode + 2;
-+ clear_flg = 1;
-+
-+ output( (code_int)ClearCode );
-+}
-+
-+static void
-+cl_hash(register count_int hsize) /* reset code table */
-+
-+{
-+
-+ register count_int *htab_p = htab+hsize;
-+
-+ register long i;
-+ register long m1 = -1;
-+
-+ i = hsize - 16;
-+ do { /* might use Sys V memset(3) here */
-+ *(htab_p-16) = m1;
-+ *(htab_p-15) = m1;
-+ *(htab_p-14) = m1;
-+ *(htab_p-13) = m1;
-+ *(htab_p-12) = m1;
-+ *(htab_p-11) = m1;
-+ *(htab_p-10) = m1;
-+ *(htab_p-9) = m1;
-+ *(htab_p-8) = m1;
-+ *(htab_p-7) = m1;
-+ *(htab_p-6) = m1;
-+ *(htab_p-5) = m1;
-+ *(htab_p-4) = m1;
-+ *(htab_p-3) = m1;
-+ *(htab_p-2) = m1;
-+ *(htab_p-1) = m1;
-+ htab_p -= 16;
-+ } while ((i -= 16) >= 0);
-+
-+ for ( i += 16; i > 0; --i )
-+ *--htab_p = m1;
-+}
-+
-+/******************************************************************************
-+ *
-+ * GIF Specific routines
-+ *
-+ ******************************************************************************/
-+
-+/*
-+ * Number of characters so far in this 'packet'
-+ */
-+static int a_count;
-+
-+/*
-+ * Set up the 'byte output' routine
-+ */
-+static void
-+char_init(void)
-+{
-+ a_count = 0;
-+}
-+
-+/*
-+ * Define the storage for the packet accumulator
-+ */
-+static char accum[ 256 ];
-+
-+/*
-+ * Add a character to the end of the current packet, and if it is 254
-+ * characters, flush the packet to disk.
-+ */
-+static void
-+char_out(int c)
-+{
-+ accum[ a_count++ ] = c;
-+ if( a_count >= 254 )
-+ flush_char();
-+}
-+
-+/*
-+ * Flush the packet to disk, and reset the accumulator
-+ */
-+static void
-+flush_char(void)
-+{
-+ if( a_count > 0 ) {
-+ gdPutC( a_count, g_outfile );
-+ gdPutBuf( accum, a_count, g_outfile );
-+ a_count = 0;
-+ }
-+}
-+
-+static void init_statics(void) {
-+ /* Some of these are properly initialized later. What I'm doing
-+ here is making sure code that depends on C's initialization
-+ of statics doesn't break when the code gets called more
-+ than once. */
-+ Width = 0;
-+ Height = 0;
-+ curx = 0;
-+ cury = 0;
-+ CountDown = 0;
-+ Pass = 0;
-+ Interlace = 0;
-+ a_count = 0;
-+ cur_accum = 0;
-+ cur_bits = 0;
-+ g_init_bits = 0;
-+ g_outfile = 0;
-+ ClearCode = 0;
-+ EOFCode = 0;
-+ free_ent = 0;
-+ clear_flg = 0;
-+ offset = 0;
-+ in_count = 1;
-+ out_count = 0;
-+ hsize = HSIZE;
-+ n_bits = 0;
-+ maxbits = GIFBITS;
-+ maxcode = 0;
-+ maxmaxcode = (code_int)1 << GIFBITS;
-+}
-+
-+
-+/* +-------------------------------------------------------------------+ */
-+/* | Copyright 1990, 1991, 1993, David Koblas. (koblas@netcom.com) | */
-+/* | Permission to use, copy, modify, and distribute this software | */
-+/* | and its documentation for any purpose and without fee is hereby | */
-+/* | granted, provided that the above copyright notice appear in all | */
-+/* | copies and that both that copyright notice and this permission | */
-+/* | notice appear in supporting documentation. This software is | */
-+/* | provided "as is" without express or implied warranty. | */
-+/* +-------------------------------------------------------------------+ */
generated by cgit v1.2.3 (git 2.25.1) at 2025-03-01 02:45:57 +0000