inicial

1 files changed, 1872 insertions, 0 deletions

diff --git a/backend/tiff/tiff2ps.c b/backend/tiff/tiff2ps.c
new file mode 100644
index 00000000..43a6cb32
--- /dev/null
+++ b/backend/tiff/tiff2ps.c
@@ -0,0 +1,1872 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
+/* $Id$ */
+
+/*
+ * Copyright (c) 1988-1997 Sam Leffler
+ * Copyright (c) 1991-1997 Silicon Graphics, Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and 
+ * its documentation for any purpose is hereby granted without fee, provided
+ * that (i) the above copyright notices and this permission notice appear in
+ * all copies of the software and related documentation, and (ii) the names of
+ * Sam Leffler and Silicon Graphics may not be used in any advertising or
+ * publicity relating to the software without the specific, prior written
+ * permission of Sam Leffler and Silicon Graphics.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, 
+ * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY 
+ * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.  
+ * 
+ * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
+ * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
+ * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+ * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF 
+ * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 
+ * OF THIS SOFTWARE.
+ */
+
+/*
+ * Modified for use as Evince TIFF ps exporter by
+ * Matthew S. Wilson <[email protected]>
+ * Modifications Copyright (C) 2005 rpath, Inc.
+ *
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>			/* for atof */
+#include <math.h>
+#include <time.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <glib.h>
+#include <glib/gstdio.h>
+
+#include "tiff2ps.h"
+
+/*
+ * Revision history
+ *
+ * 2001-Mar-21
+ *    I (Bruce A. Mallett) added this revision history comment ;)
+ *
+ *    Fixed PS_Lvl2page() code which outputs non-ASCII85 raw
+ *    data.  Moved test for when to output a line break to
+ *    *after* the output of a character.  This just serves
+ *    to fix an eye-nuisance where the first line of raw
+ *    data was one character shorter than subsequent lines.
+ *
+ *    Added an experimental ASCII85 encoder which can be used
+ *    only when there is a single buffer of bytes to be encoded.
+ *    This version is much faster at encoding a straight-line
+ *    buffer of data because it can avoid alot of the loop
+ *    overhead of the byte-by-bye version.  To use this version
+ *    you need to define EXP_ASCII85ENCODER (experimental ...).
+ *
+ *    Added bug fix given by Michael Schmidt to PS_Lvl2page()
+ *    in which an end-of-data marker ('>') was not being output
+ *    when producing non-ASCII85 encoded PostScript Level 2
+ *    data.
+ *
+ *    Fixed PS_Lvl2colorspace() so that it no longer assumes that
+ *    a TIFF having more than 2 planes is a CMYK.  This routine
+ *    no longer looks at the samples per pixel but instead looks
+ *    at the "photometric" value.  This change allows support of
+ *    CMYK TIFFs.
+ *
+ *    Modified the PostScript L2 imaging loop so as to test if
+ *    the input stream is still open before attempting to do a
+ *    flushfile on it.  This was done because some RIPs close
+ *    the stream after doing the image operation.
+ *
+ *    Got rid of the realloc() being done inside a loop in the
+ *    PSRawDataBW() routine.  The code now walks through the
+ *    byte-size array outside the loop to determine the largest
+ *    size memory block that will be needed.
+ *
+ *    Added "-m" switch to ask tiff2ps to, where possible, use the
+ *    "imagemask" operator instead of the "image" operator.
+ *
+ *    Added the "-i #" switch to allow interpolation to be disabled.
+ *
+ *    Unrolled a loop or two to improve performance.
+ */
+
+/*
+ * Define EXP_ASCII85ENCODER if you want to use an experimental
+ * version of the ASCII85 encoding routine.  The advantage of
+ * using this routine is that tiff2ps will convert to ASCII85
+ * encoding at between 3 and 4 times the speed as compared to
+ * using the old (non-experimental) encoder.  The disadvantage
+ * is that you will be using a new (and unproven) encoding
+ * routine.  So user beware, you have been warned!
+ */
+
+#define	EXP_ASCII85ENCODER
+
+/*
+ * NB: this code assumes uint32 works with printf's %l[ud].
+ */
+
+struct _TIFF2PSContext
+{
+	char *filename;		/* input filename */
+	FILE *fd;		/* output file stream */
+	int ascii85;		/* use ASCII85 encoding */
+	int interpolate;	/* interpolate level2 image */
+	int level2;		/* generate PostScript level 2 */
+	int level3;		/* generate PostScript level 3 */
+	int generateEPSF;	/* generate Encapsulated PostScript */
+	int PSduplex;		/* enable duplex printing */
+	int PStumble;		/* enable top edge binding */
+	int PSavoiddeadzone;	/* enable avoiding printer deadzone */
+	double maxPageHeight;	/* maximum size to fit on page */
+	double splitOverlap;	/* amount for split pages to overlag */
+	int rotate;		/* rotate image by 180 degrees */
+	int useImagemask;	/* Use imagemask instead of image operator */
+	uint16 res_unit;	/* Resolution units: 2 - inches, 3 - cm */
+	int npages;		/* number of pages processed */
+
+	tsize_t tf_bytesperrow;
+	tsize_t ps_bytesperrow;
+	tsize_t	tf_rowsperstrip;
+	tsize_t	tf_numberstrips;
+
+	/*
+	 * ASCII85 Encoding Support.
+	 */
+	unsigned char ascii85buf[10];
+	int ascii85count;
+	int ascii85breaklen;
+	uint16 samplesperpixel;
+	uint16 bitspersample;
+	uint16 planarconfiguration;
+	uint16 photometric;
+	uint16 compression;
+	uint16 extrasamples;
+	int alpha;
+};
+
+static void PSpage(TIFF2PSContext*, TIFF*, uint32, uint32);
+static void PSColorContigPreamble(TIFF2PSContext*, uint32, uint32, int);
+static void PSColorSeparatePreamble(TIFF2PSContext*, uint32, uint32, int);
+static void PSDataColorContig(TIFF2PSContext*, TIFF*, uint32, uint32, int);
+static void PSDataColorSeparate(TIFF2PSContext*, TIFF*, uint32, uint32, int);
+static void PSDataPalette(TIFF2PSContext*, TIFF*, uint32, uint32);
+static void PSDataBW(TIFF2PSContext*, TIFF*, uint32, uint32);
+static void Ascii85Init(TIFF2PSContext*);
+static void Ascii85Put(TIFF2PSContext*, unsigned char);
+static void Ascii85Flush(TIFF2PSContext*);
+static void PSHead(TIFF2PSContext*, TIFF*, uint32, uint32,
+		   double, double, double, double);
+static void PSTail(TIFF2PSContext*);
+
+#if defined( EXP_ASCII85ENCODER )
+static int Ascii85EncodeBlock(TIFF2PSContext*, uint8 * ascii85_p,
+			      unsigned f_eod, const uint8 * raw_p, int raw_l);
+#endif
+
+TIFF2PSContext* tiff2ps_context_new(const gchar *filename) {
+	TIFF2PSContext* ctx;
+
+	ctx = g_new0(TIFF2PSContext, 1);
+	ctx->filename = g_strdup(filename);
+	ctx->fd = g_fopen(ctx->filename, "w");
+	if (ctx->fd == NULL) {
+		g_free (ctx->filename);
+		g_free (ctx);
+		return NULL;
+	}
+	ctx->interpolate = TRUE;     /* interpolate level2 image */
+	ctx->PSavoiddeadzone = TRUE; /* enable avoiding printer deadzone */
+	return ctx;
+}
+
+void tiff2ps_context_finalize(TIFF2PSContext *ctx) {
+	PSTail(ctx);
+	fclose(ctx->fd);
+	g_free(ctx->filename);
+	g_free(ctx);
+}
+
+static int
+checkImage(TIFF2PSContext *ctx, TIFF* tif)
+{
+	switch (ctx->photometric) {
+	case PHOTOMETRIC_YCBCR:
+		if ((ctx->compression == COMPRESSION_JPEG
+		     || ctx->compression == COMPRESSION_OJPEG)
+		    && ctx->planarconfiguration == PLANARCONFIG_CONTIG) {
+			/* can rely on libjpeg to convert to RGB */
+			TIFFSetField(tif, TIFFTAG_JPEGCOLORMODE,
+				     JPEGCOLORMODE_RGB);
+			ctx->photometric = PHOTOMETRIC_RGB;
+		} else {
+			if (ctx->level2 || ctx->level3)
+				break;
+			TIFFError(ctx->filename, "Can not handle image with %s",
+			    "Ctx->PhotometricInterpretation=YCbCr");
+			return (0);
+		}
+		/* fall thru... */
+	case PHOTOMETRIC_RGB:
+		if (ctx->alpha && ctx->bitspersample != 8) {
+			TIFFError(ctx->filename,
+			    "Can not handle %d-bit/sample RGB image with ctx->alpha",
+			    ctx->bitspersample);
+			return (0);
+		}
+		/* fall thru... */
+	case PHOTOMETRIC_SEPARATED:
+	case PHOTOMETRIC_PALETTE:
+	case PHOTOMETRIC_MINISBLACK:
+	case PHOTOMETRIC_MINISWHITE:
+		break;
+	case PHOTOMETRIC_LOGL:
+	case PHOTOMETRIC_LOGLUV:
+		if (ctx->compression != COMPRESSION_SGILOG &&
+		    ctx->compression != COMPRESSION_SGILOG24) {
+			TIFFError(ctx->filename,
+		    "Can not handle %s data with ctx->compression other than SGILog",
+			    (ctx->photometric == PHOTOMETRIC_LOGL) ?
+				"LogL" : "LogLuv"
+			);
+			return (0);
+		}
+		/* rely on library to convert to RGB/greyscale */
+		TIFFSetField(tif, TIFFTAG_SGILOGDATAFMT, SGILOGDATAFMT_8BIT);
+		ctx->photometric = (ctx->photometric == PHOTOMETRIC_LOGL) ?
+		    PHOTOMETRIC_MINISBLACK : PHOTOMETRIC_RGB;
+		ctx->bitspersample = 8;
+		break;
+	case PHOTOMETRIC_CIELAB:
+		/* fall thru... */
+	default:
+		TIFFError(ctx->filename,
+		    "Can not handle image with Ctx->PhotometricInterpretation=%d",
+		    ctx->photometric);
+		return (0);
+	}
+	switch (ctx->bitspersample) {
+	case 1: case 2:
+	case 4: case 8:
+		break;
+	default:
+		TIFFError(ctx->filename, "Can not handle %d-bit/sample image",
+		    ctx->bitspersample);
+		return (0);
+	}
+	if (ctx->planarconfiguration == PLANARCONFIG_SEPARATE &&
+	    ctx->extrasamples > 0)
+		TIFFWarning(ctx->filename, "Ignoring extra samples");
+	return (1);
+}
+
+#define PS_UNIT_SIZE	72.0F
+#define	PSUNITS(npix,res)	((npix) * (PS_UNIT_SIZE / (res)))
+
+static	char RGBcolorimage[] = "\
+/bwproc {\n\
+    rgbproc\n\
+    dup length 3 idiv string 0 3 0\n\
+    5 -1 roll {\n\
+	add 2 1 roll 1 sub dup 0 eq {\n\
+	    pop 3 idiv\n\
+	    3 -1 roll\n\
+	    dup 4 -1 roll\n\
+	    dup 3 1 roll\n\
+	    5 -1 roll put\n\
+	    1 add 3 0\n\
+	} { 2 1 roll } ifelse\n\
+    } forall\n\
+    pop pop pop\n\
+} def\n\
+/colorimage where {pop} {\n\
+    /colorimage {pop pop /rgbproc exch def {bwproc} image} bind def\n\
+} ifelse\n\
+";
+
+/*
+ * Adobe Photoshop requires a comment line of the form:
+ *
+ * %ImageData: <cols> <rows> <depth>  <main channels> <pad channels>
+ *	<block size> <1 for binary|2 for hex> "data start"
+ *
+ * It is claimed to be part of some future revision of the EPS spec.
+ */
+static void
+PhotoshopBanner(TIFF2PSContext* ctx, uint32 w, uint32 h, int bs, int nc,
+		char* startline)
+{
+	fprintf(ctx->fd, "%%ImageData: %ld %ld %d %d 0 %d 2 \"",
+	    (long) w, (long) h, ctx->bitspersample, nc, bs);
+	fprintf(ctx->fd, startline, nc);
+	fprintf(ctx->fd, "\"\n");
+}
+
+/*
+ *   pw : image width in pixels
+ *   ph : image height in pixels
+ * pprw : image width in PS units (72 dpi)
+ * pprh : image height in PS units (72 dpi)
+ */
+static void
+setupPageState(TIFF2PSContext *ctx, TIFF* tif, uint32* pw, uint32* ph,
+	       double* pprw, double* pprh)
+{
+	float xres = 0.0F, yres = 0.0F;
+
+	TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, pw);
+	TIFFGetField(tif, TIFFTAG_IMAGELENGTH, ph);
+	if (ctx->res_unit == 0)
+		TIFFGetFieldDefaulted(tif, TIFFTAG_RESOLUTIONUNIT, &ctx->res_unit);
+	/*
+	 * Calculate printable area.
+	 */
+	if (!TIFFGetField(tif, TIFFTAG_XRESOLUTION, &xres)
+            || fabs(xres) < 0.0000001)
+		xres = PS_UNIT_SIZE;
+	if (!TIFFGetField(tif, TIFFTAG_YRESOLUTION, &yres)
+            || fabs(yres) < 0.0000001)
+		yres = PS_UNIT_SIZE;
+	switch (ctx->res_unit) {
+	case RESUNIT_CENTIMETER:
+		xres *= 2.54F, yres *= 2.54F;
+		break;
+	case RESUNIT_INCH:
+		break;
+	case RESUNIT_NONE:
+	default:
+		xres *= PS_UNIT_SIZE, yres *= PS_UNIT_SIZE;
+		break;
+	}
+	*pprh = PSUNITS(*ph, yres);
+	*pprw = PSUNITS(*pw, xres);
+}
+
+static int
+isCCITTCompression(TIFF* tif)
+{
+    uint16 compress;
+    TIFFGetField(tif, TIFFTAG_COMPRESSION, &compress);
+    return (compress == COMPRESSION_CCITTFAX3 ||
+	    compress == COMPRESSION_CCITTFAX4 ||
+	    compress == COMPRESSION_CCITTRLE ||
+	    compress == COMPRESSION_CCITTRLEW);
+}
+
+static	char *hex = "0123456789abcdef";
+
+/*
+ * imagewidth & imageheight are 1/72 inches
+ * pagewidth & pageheight are inches
+ */
+static int
+PlaceImage(TIFF2PSContext *ctx, double pagewidth, double pageheight,
+	   double imagewidth, double imageheight, int splitpage,
+	   double lm, double bm, int cnt)
+{
+	double xtran = 0;
+	double ytran = 0;
+	double xscale = 1;
+	double yscale = 1;
+	double left_offset = lm * PS_UNIT_SIZE;
+	double bottom_offset = bm * PS_UNIT_SIZE;
+	double subimageheight;
+	double splitheight;
+	double overlap;
+	/* buffers for locale-insitive number formatting */
+	gchar buf[2][G_ASCII_DTOSTR_BUF_SIZE];
+
+	pagewidth *= PS_UNIT_SIZE;
+	pageheight *= PS_UNIT_SIZE;
+
+	if (ctx->maxPageHeight==0)
+		splitheight = 0;
+	else
+		splitheight = ctx->maxPageHeight * PS_UNIT_SIZE;
+	overlap = ctx->splitOverlap * PS_UNIT_SIZE;
+
+	/*
+	 * WIDTH:
+	 *      if too wide, scrunch to fit
+	 *      else leave it alone
+	 */
+	if (imagewidth <= pagewidth) {
+		xscale = imagewidth;
+	} else {
+		xscale = pagewidth;
+	}
+
+	/* HEIGHT:
+	 *      if too long, scrunch to fit
+	 *      if too short, move to top of page
+	 */
+	if (imageheight <= pageheight) {
+		yscale = imageheight;
+		ytran = pageheight - imageheight;
+	} else if (imageheight > pageheight &&
+		(splitheight == 0 || imageheight <= splitheight)) {
+		yscale = pageheight;
+	} else /* imageheight > splitheight */ {
+		subimageheight = imageheight - (pageheight-overlap)*splitpage;
+		if (subimageheight <= pageheight) {
+			yscale = imageheight;
+			ytran = pageheight - subimageheight;
+			splitpage = 0;
+		} else if ( subimageheight > pageheight && subimageheight <= splitheight) {
+			yscale = imageheight * pageheight / subimageheight;
+			ytran = 0;
+			splitpage = 0;
+		} else /* sumimageheight > splitheight */ {
+			yscale = imageheight;
+			ytran = pageheight - subimageheight;
+			splitpage++;
+		}
+	}
+
+	bottom_offset += ytran / (cnt?2:1);
+	if (cnt)
+		left_offset += xtran / 2;
+
+	fprintf(ctx->fd, "%s %s translate\n",
+		g_ascii_dtostr(buf[0], sizeof(buf[0]), left_offset),
+		g_ascii_dtostr(buf[1], sizeof(buf[1]), bottom_offset));
+	fprintf(ctx->fd, "%s %s scale\n",
+		g_ascii_dtostr(buf[0], sizeof(buf[0]), xscale),
+		g_ascii_dtostr(buf[1], sizeof(buf[1]), yscale));
+	if (ctx->rotate)
+		fputs ("1 1 translate 180 ctx->rotate\n", ctx->fd);
+
+	return splitpage;
+}
+
+
+void
+tiff2ps_process_page(TIFF2PSContext* ctx, TIFF* tif, double pw, double ph,
+		     double lm, double bm, gboolean cnt)
+{
+	uint32 w, h;
+	float ox, oy;
+        double prw, prh;
+	double scale = 1.0;
+	double left_offset = lm * PS_UNIT_SIZE;
+	double bottom_offset = bm * PS_UNIT_SIZE;
+	uint16* sampleinfo;
+	int split;
+	/* buffers for locale-insitive number formatting */
+	gchar buf[2][G_ASCII_DTOSTR_BUF_SIZE];
+
+	if (!TIFFGetField(tif, TIFFTAG_XPOSITION, &ox))
+		ox = 0;
+	if (!TIFFGetField(tif, TIFFTAG_YPOSITION, &oy))
+		oy = 0;
+	setupPageState(ctx, tif, &w, &h, &prw, &prh);
+
+	ctx->tf_numberstrips = TIFFNumberOfStrips(tif);
+	TIFFGetFieldDefaulted(tif, TIFFTAG_ROWSPERSTRIP,
+			      &ctx->tf_rowsperstrip);
+	setupPageState(ctx, tif, &w, &h, &prw, &prh);
+	if (!ctx->npages)
+		PSHead(ctx, tif, w, h, prw, prh, ox, oy);
+	TIFFGetFieldDefaulted(tif, TIFFTAG_BITSPERSAMPLE,
+			      &ctx->bitspersample);
+	TIFFGetFieldDefaulted(tif, TIFFTAG_SAMPLESPERPIXEL,
+			      &ctx->samplesperpixel);
+	TIFFGetFieldDefaulted(tif, TIFFTAG_PLANARCONFIG,
+			      &ctx->planarconfiguration);
+	TIFFGetField(tif, TIFFTAG_COMPRESSION, &ctx->compression);
+	TIFFGetFieldDefaulted(tif, TIFFTAG_EXTRASAMPLES,
+			      &ctx->extrasamples, &sampleinfo);
+	ctx->alpha = (ctx->extrasamples == 1 &&
+		      sampleinfo[0] == EXTRASAMPLE_ASSOCALPHA);
+	if (!TIFFGetField(tif, TIFFTAG_PHOTOMETRIC, &ctx->photometric)) {
+		switch (ctx->samplesperpixel - ctx->extrasamples) {
+		case 1:
+			if (isCCITTCompression(tif))
+				ctx->photometric = PHOTOMETRIC_MINISWHITE;
+			else
+				ctx->photometric = PHOTOMETRIC_MINISBLACK;
+			break;
+		case 3:
+			ctx->photometric = PHOTOMETRIC_RGB;
+			break;
+		case 4:
+			ctx->photometric = PHOTOMETRIC_SEPARATED;
+			break;
+		}
+	}
+	if (checkImage(ctx, tif)) {
+		ctx->tf_bytesperrow = TIFFScanlineSize(tif);
+		ctx->npages++;
+		fprintf(ctx->fd, "%%%%Page: %d %d\n", ctx->npages,
+			ctx->npages);
+		if (!ctx->generateEPSF && ( ctx->level2 || ctx->level3 )) {
+			double psw = 0.0, psh = 0.0;
+			if (psw != 0.0) {
+				psw = pw * PS_UNIT_SIZE;
+				if (ctx->res_unit == RESUNIT_CENTIMETER)
+					psw *= 2.54F;
+			} else
+				psw=ctx->rotate ? prh:prw;
+			if (psh != 0.0) {
+				psh = ph * PS_UNIT_SIZE;
+				if (ctx->res_unit == RESUNIT_CENTIMETER)
+					psh *= 2.54F;
+			} else
+				psh=ctx->rotate ? prw:prh;
+			fprintf(ctx->fd,
+				"1 dict begin /PageSize [ %s %s ] def currentdict end setpagedevice\n",
+				g_ascii_dtostr(buf[0], sizeof(buf[0]), psw),
+				g_ascii_dtostr(buf[1], sizeof(buf[1]), psh));
+			fputs(
+			      "<<\n  /Policies <<\n    /PageSize 3\n  >>\n>> setpagedevice\n",
+			      ctx->fd);
+		}
+		fprintf(ctx->fd, "gsave\n");
+		fprintf(ctx->fd, "100 dict begin\n");
+		if (pw != 0 || ph != 0) {
+			if (!pw)
+				pw = prw;
+			if (!ph)
+				ph = prh;
+			if (ctx->maxPageHeight) { /* used -H option */
+				split = PlaceImage(ctx,pw,ph,prw,prh,
+						   0,lm,bm,cnt);
+				while( split ) {
+					PSpage(ctx, tif, w, h);
+					fprintf(ctx->fd, "end\n");
+					fprintf(ctx->fd, "grestore\n");
+					fprintf(ctx->fd, "showpage\n");
+					ctx->npages++;
+					fprintf(ctx->fd, "%%%%Page: %d %d\n",
+						ctx->npages, ctx->npages);
+					fprintf(ctx->fd, "gsave\n");
+					fprintf(ctx->fd, "100 dict begin\n");
+					split = PlaceImage(ctx,pw,ph,prw,prh,
+							   split,lm,bm,cnt);
+				}
+			} else {
+				pw *= PS_UNIT_SIZE;
+				ph *= PS_UNIT_SIZE;
+
+				/* NB: maintain image aspect ratio */
+				scale = pw/prw < ph/prh ?
+					pw/prw : ph/prh;
+				if (scale > 1.0)
+					scale = 1.0;
+				if (cnt) {
+					bottom_offset +=
+						(ph - prh * scale) / 2;
+					left_offset +=
+						(pw - prw * scale) / 2;
+				}
+				fprintf(ctx->fd, "%s %s translate\n",
+					g_ascii_dtostr(buf[0], sizeof(buf[0]), left_offset),
+					g_ascii_dtostr(buf[1], sizeof(buf[1]), bottom_offset));
+				fprintf(ctx->fd, "%s %s scale\n",
+					g_ascii_dtostr(buf[0], sizeof(buf[0]), prw * scale),
+					g_ascii_dtostr(buf[1], sizeof(buf[1]), prh * scale));
+				if (ctx->rotate)
+					fputs ("1 1 translate 180 ctx->rotate\n", ctx->fd);
+			}
+		} else {
+			fprintf(ctx->fd, "%s %s scale\n",
+				g_ascii_dtostr(buf[0], sizeof(buf[0]), prw),
+				g_ascii_dtostr(buf[1], sizeof(buf[1]), prh));
+			if (ctx->rotate)
+				fputs ("1 1 translate 180 ctx->rotate\n", ctx->fd);
+		}
+		PSpage(ctx, tif, w, h);
+		fprintf(ctx->fd, "end\n");
+		fprintf(ctx->fd, "grestore\n");
+		fprintf(ctx->fd, "showpage\n");
+	}
+}
+
+
+static char DuplexPreamble[] = "\
+%%BeginFeature: *Duplex True\n\
+systemdict begin\n\
+  /languagelevel where { pop languagelevel } { 1 } ifelse\n\
+  2 ge { 1 dict dup /Duplex true put setpagedevice }\n\
+  { statusdict /setduplex known { statusdict begin setduplex true end } if\n\
+  } ifelse\n\
+end\n\
+%%EndFeature\n\
+";
+
+static char TumblePreamble[] = "\
+%%BeginFeature: *Tumble True\n\
+systemdict begin\n\
+  /languagelevel where { pop languagelevel } { 1 } ifelse\n\
+  2 ge { 1 dict dup /Tumble true put setpagedevice }\n\
+  { statusdict /settumble known { statusdict begin true settumble end } if\n\
+  } ifelse\n\
+end\n\
+%%EndFeature\n\
+";
+
+static char AvoidDeadZonePreamble[] = "\
+gsave newpath clippath pathbbox grestore\n\
+  4 2 roll 2 copy translate\n\
+  exch 3 1 roll sub 3 1 roll sub exch\n\
+  currentpagedevice /PageSize get aload pop\n\
+  exch 3 1 roll div 3 1 roll div abs exch abs\n\
+  2 copy gt { exch } if pop\n\
+  dup 1 lt { dup scale } { pop } ifelse\n\
+";
+
+void
+PSHead(TIFF2PSContext *ctx, TIFF *tif, uint32 w, uint32 h,
+       double pw, double ph, double ox, double oy)
+{
+	time_t t;
+
+	(void) tif; (void) w; (void) h;
+	t = time(0);
+	fprintf(ctx->fd, "%%!PS-Adobe-3.0%s\n",
+		ctx->generateEPSF ? " EPSF-3.0" : "");
+	fprintf(ctx->fd, "%%%%Creator: Evince\n");
+	fprintf(ctx->fd, "%%%%CreationDate: %s", ctime(&t));
+	fprintf(ctx->fd, "%%%%DocumentData: Clean7Bit\n");
+	fprintf(ctx->fd, "%%%%Origin: %ld %ld\n", (long) ox, (long) oy);
+	/* NB: should use PageBoundingBox */
+	fprintf(ctx->fd, "%%%%BoundingBox: 0 0 %ld %ld\n",
+		(long) ceil(pw), (long) ceil(ph));
+	fprintf(ctx->fd, "%%%%LanguageLevel: %d\n",
+		(ctx->level3 ? 3 : (ctx->level2 ? 2 : 1)));
+	fprintf(ctx->fd, "%%%%Pages: (atend)\n");
+	fprintf(ctx->fd, "%%%%EndComments\n");
+	fprintf(ctx->fd, "%%%%BeginSetup\n");
+	if (ctx->PSduplex)
+		fprintf(ctx->fd, "%s", DuplexPreamble);
+	if (ctx->PStumble)
+		fprintf(ctx->fd, "%s", TumblePreamble);
+	if (ctx->PSavoiddeadzone && (ctx->level2 || ctx->level3))
+		fprintf(ctx->fd, "%s", AvoidDeadZonePreamble);
+	fprintf(ctx->fd, "%%%%EndSetup\n");
+}
+
+static void
+PSTail(TIFF2PSContext *ctx)
+{
+	if (!ctx->npages)
+		return;
+	fprintf(ctx->fd, "%%%%Trailer\n");
+	fprintf(ctx->fd, "%%%%Pages: %d\n", ctx->npages);
+	fprintf(ctx->fd, "%%%%EOF\n");
+}
+
+static int
+checkcmap(TIFF2PSContext* ctx, TIFF* tif, int n,
+	  uint16* r, uint16* g, uint16* b)
+{
+	(void) tif;
+	while (n-- > 0)
+		if (*r++ >= 256 || *g++ >= 256 || *b++ >= 256)
+			return (16);
+	TIFFWarning(ctx->filename, "Assuming 8-bit colormap");
+	return (8);
+}
+
+static void
+PS_Lvl2colorspace(TIFF2PSContext* ctx, TIFF* tif)
+{
+	uint16 *rmap, *gmap, *bmap;
+	int i, num_colors;
+	const char * colorspace_p;
+
+	switch ( ctx->photometric )
+	{
+	case PHOTOMETRIC_SEPARATED:
+		colorspace_p = "CMYK";
+		break;
+
+	case PHOTOMETRIC_RGB:
+		colorspace_p = "RGB";
+		break;
+
+	default:
+		colorspace_p = "Gray";
+	}
+
+	/*
+	 * Set up PostScript Level 2 colorspace according to
+	 * section 4.8 in the PostScript refenence manual.
+	 */
+	fputs("% PostScript Level 2 only.\n", ctx->fd);
+	if (ctx->photometric != PHOTOMETRIC_PALETTE) {
+		if (ctx->photometric == PHOTOMETRIC_YCBCR) {
+		    /* MORE CODE HERE */
+		}
+		fprintf(ctx->fd, "/Device%s setcolorspace\n", colorspace_p );
+		return;
+	}
+
+	/*
+	 * Set up an indexed/palette colorspace
+	 */
+	num_colors = (1 << ctx->bitspersample);
+	if (!TIFFGetField(tif, TIFFTAG_COLORMAP, &rmap, &gmap, &bmap)) {
+		TIFFError(ctx->filename,
+			"Palette image w/o \"Colormap\" tag");
+		return;
+	}
+	if (checkcmap(ctx, tif, num_colors, rmap, gmap, bmap) == 16) {
+		/*
+		 * Convert colormap to 8-bits values.
+		 */
+#define	CVT(x)		(((x) * 255) / ((1L<<16)-1))
+		for (i = 0; i < num_colors; i++) {
+			rmap[i] = CVT(rmap[i]);
+			gmap[i] = CVT(gmap[i]);
+			bmap[i] = CVT(bmap[i]);
+		}
+#undef CVT
+	}
+	fprintf(ctx->fd, "[ /Indexed /DeviceRGB %d", num_colors - 1);
+	if (ctx->ascii85) {
+		Ascii85Init(ctx);
+		fputs("\n<~", ctx->fd);
+		ctx->ascii85breaklen -= 2;
+	} else
+		fputs(" <", ctx->fd);
+	for (i = 0; i < num_colors; i++) {
+		if (ctx->ascii85) {
+			Ascii85Put(ctx, (unsigned char)rmap[i]);
+			Ascii85Put(ctx, (unsigned char)gmap[i]);
+			Ascii85Put(ctx, (unsigned char)bmap[i]);
+		} else {
+			fputs((i % 8) ? " " : "\n  ", ctx->fd);
+			fprintf(ctx->fd, "%02x%02x%02x",
+			    rmap[i], gmap[i], bmap[i]);
+		}
+	}
+	if (ctx->ascii85)
+		Ascii85Flush(ctx);
+	else
+		fputs(">\n", ctx->fd);
+	fputs("] setcolorspace\n", ctx->fd);
+}
+
+static int
+PS_Lvl2ImageDict(TIFF2PSContext* ctx, TIFF* tif, uint32 w, uint32 h)
+{
+	int use_rawdata;
+	uint32 tile_width, tile_height;
+	uint16 predictor, minsamplevalue, maxsamplevalue;
+	int repeat_count;
+	char im_h[64], im_x[64], im_y[64];
+	char * imageOp = "image";
+
+	if ( ctx->useImagemask && (ctx->bitspersample == 1) )
+		imageOp = "imagemask";
+
+	(void)strcpy(im_x, "0");
+	(void)sprintf(im_y, "%lu", (long) h);
+	(void)sprintf(im_h, "%lu", (long) h);
+	tile_width = w;
+	tile_height = h;
+	if (TIFFIsTiled(tif)) {
+		repeat_count = TIFFNumberOfTiles(tif);
+		TIFFGetField(tif, TIFFTAG_TILEWIDTH, &tile_width);
+		TIFFGetField(tif, TIFFTAG_TILELENGTH, &tile_height);
+		if (tile_width > w || tile_height > h ||
+		    (w % tile_width) != 0 || (h % tile_height != 0)) {
+			/*
+			 * The tiles does not fit image width and height.
+			 * Set up a clip rectangle for the image unit square.
+			 */
+			fputs("0 0 1 1 rectclip\n", ctx->fd);
+		}
+		if (tile_width < w) {
+			fputs("/im_x 0 def\n", ctx->fd);
+			(void)strcpy(im_x, "im_x neg");
+		}
+		if (tile_height < h) {
+			fputs("/im_y 0 def\n", ctx->fd);
+			(void)sprintf(im_y, "%lu im_y sub", (unsigned long) h);
+		}
+	} else {
+		repeat_count = ctx->tf_numberstrips;
+		tile_height = ctx->tf_rowsperstrip;
+		if (tile_height > h)
+			tile_height = h;
+		if (repeat_count > 1) {
+			fputs("/im_y 0 def\n", ctx->fd);
+			fprintf(ctx->fd, "/im_h %lu def\n",
+			    (unsigned long) tile_height);
+			(void)strcpy(im_h, "im_h");
+			(void)sprintf(im_y, "%lu im_y sub", (unsigned long) h);
+		}
+	}
+
+	/*
+	 * Output start of exec block
+	 */
+	fputs("{ % exec\n", ctx->fd);
+
+	if (repeat_count > 1)
+		fprintf(ctx->fd, "%d { %% repeat\n", repeat_count);
+
+	/*
+	 * Output filter options and image dictionary.
+	 */
+	if (ctx->ascii85)
+		fputs(" /im_stream currentfile /ASCII85Decode filter def\n",
+		      ctx->fd);
+	fputs(" <<\n", ctx->fd);
+	fputs("  /ImageType 1\n", ctx->fd);
+	fprintf(ctx->fd, "  /Width %lu\n", (unsigned long) tile_width);
+	/*
+	 * Workaround for some software that may crash when last strip
+	 * of image contains fewer number of scanlines than specified
+	 * by the `/Height' variable. So for stripped images with multiple
+	 * strips we will set `/Height' as `im_h', because one is 
+	 * recalculated for each strip - including the (smaller) final strip.
+	 * For tiled images and images with only one strip `/Height' will
+	 * contain number of scanlines in tile (or image height in case of
+	 * one-stripped image).
+	 */
+	if (TIFFIsTiled(tif) || ctx->tf_numberstrips == 1)
+		fprintf(ctx->fd, "  /Height %lu\n", (unsigned long) tile_height);
+	else
+		fprintf(ctx->fd, "  /Height im_h\n");
+
+	if (ctx->planarconfiguration == PLANARCONFIG_SEPARATE && ctx->samplesperpixel > 1)
+		fputs("  /MultipleDataSources true\n", ctx->fd);
+	fprintf(ctx->fd, "  /ImageMatrix [ %lu 0 0 %ld %s %s ]\n",
+	    (unsigned long) w, - (long)h, im_x, im_y);
+	fprintf(ctx->fd, "  /BitsPerComponent %d\n", ctx->bitspersample);
+	fprintf(ctx->fd, "  /Ctx->Interpolate %s\n", ctx->interpolate ? "true" : "false");
+
+	switch (ctx->samplesperpixel - ctx->extrasamples) {
+	case 1:
+		switch (ctx->photometric) {
+		case PHOTOMETRIC_MINISBLACK:
+			fputs("  /Decode [0 1]\n", ctx->fd);
+			break;
+		case PHOTOMETRIC_MINISWHITE:
+			switch (ctx->compression) {
+			case COMPRESSION_CCITTRLE:
+			case COMPRESSION_CCITTRLEW:
+			case COMPRESSION_CCITTFAX3:
+			case COMPRESSION_CCITTFAX4:
+				/*
+				 * Manage inverting with /Blackis1 flag
+				 * since there migth be uncompressed parts
+				 */
+				fputs("  /Decode [0 1]\n", ctx->fd);
+				break;
+			default:
+				/*
+				 * ERROR...
+				 */
+				fputs("  /Decode [1 0]\n", ctx->fd);
+				break;
+			}
+			break;
+		case PHOTOMETRIC_PALETTE:
+			TIFFGetFieldDefaulted(tif, TIFFTAG_MINSAMPLEVALUE,
+			    &minsamplevalue);
+			TIFFGetFieldDefaulted(tif, TIFFTAG_MAXSAMPLEVALUE,
+			    &maxsamplevalue);
+			fprintf(ctx->fd, "  /Decode [%u %u]\n",
+				    minsamplevalue, maxsamplevalue);
+			break;
+		default:
+			/*
+			 * ERROR ?
+			 */
+			fputs("  /Decode [0 1]\n", ctx->fd);
+			break;
+		}
+		break;
+	case 3:
+		switch (ctx->photometric) {
+		case PHOTOMETRIC_RGB:
+			fputs("  /Decode [0 1 0 1 0 1]\n", ctx->fd);
+			break;
+		case PHOTOMETRIC_MINISWHITE:
+		case PHOTOMETRIC_MINISBLACK:
+		default:
+			/*
+			 * ERROR??
+			 */
+			fputs("  /Decode [0 1 0 1 0 1]\n", ctx->fd);
+			break;
+		}
+		break;
+	case 4:
+		/*
+		 * ERROR??
+		 */
+		fputs("  /Decode [0 1 0 1 0 1 0 1]\n", ctx->fd);
+		break;
+	}
+	fputs("  /DataSource", ctx->fd);
+	if (ctx->planarconfiguration == PLANARCONFIG_SEPARATE &&
+	    ctx->samplesperpixel > 1)
+		fputs(" [", ctx->fd);
+	if (ctx->ascii85)
+		fputs(" im_stream", ctx->fd);
+	else
+		fputs(" currentfile /ASCIIHexDecode filter", ctx->fd);
+
+	use_rawdata = TRUE;
+	switch (ctx->compression) {
+	case COMPRESSION_NONE:		/* 1: uncompressed */
+		break;
+	case COMPRESSION_CCITTRLE:	/* 2: CCITT modified Huffman RLE */
+	case COMPRESSION_CCITTRLEW:	/* 32771: #1 w/ word alignment */
+	case COMPRESSION_CCITTFAX3:	/* 3: CCITT Group 3 fax encoding */
+	case COMPRESSION_CCITTFAX4:	/* 4: CCITT Group 4 fax encoding */
+		fputs("\n\t<<\n", ctx->fd);
+		if (ctx->compression == COMPRESSION_CCITTFAX3) {
+			uint32 g3_options;
+
+			fputs("\t /EndOfLine true\n", ctx->fd);
+			fputs("\t /EndOfBlock false\n", ctx->fd);
+			if (!TIFFGetField(tif, TIFFTAG_GROUP3OPTIONS,
+					    &g3_options))
+				g3_options = 0;
+			if (g3_options & GROUP3OPT_2DENCODING)
+				fprintf(ctx->fd, "\t /K %s\n", im_h);
+			if (g3_options & GROUP3OPT_UNCOMPRESSED)
+				fputs("\t /Uncompressed true\n", ctx->fd);
+			if (g3_options & GROUP3OPT_FILLBITS)
+				fputs("\t /EncodedByteAlign true\n", ctx->fd);
+		}
+		if (ctx->compression == COMPRESSION_CCITTFAX4) {
+			uint32 g4_options;
+
+			fputs("\t /K -1\n", ctx->fd);
+			TIFFGetFieldDefaulted(tif, TIFFTAG_GROUP4OPTIONS,
+					       &g4_options);
+			if (g4_options & GROUP4OPT_UNCOMPRESSED)
+				fputs("\t /Uncompressed true\n", ctx->fd);
+		}
+		if (!(tile_width == w && w == 1728U))
+			fprintf(ctx->fd, "\t /Columns %lu\n",
+			    (unsigned long) tile_width);
+		fprintf(ctx->fd, "\t /Rows %s\n", im_h);
+		if (ctx->compression == COMPRESSION_CCITTRLE ||
+		    ctx->compression == COMPRESSION_CCITTRLEW) {
+			fputs("\t /EncodedByteAlign true\n", ctx->fd);
+			fputs("\t /EndOfBlock false\n", ctx->fd);
+		}
+		if (ctx->photometric == PHOTOMETRIC_MINISBLACK)
+			fputs("\t /BlackIs1 true\n", ctx->fd);
+		fprintf(ctx->fd, "\t>> /CCITTFaxDecode filter");
+		break;
+	case COMPRESSION_LZW:	/* 5: Lempel-Ziv & Welch */
+		TIFFGetFieldDefaulted(tif, TIFFTAG_PREDICTOR, &predictor);
+		if (predictor == 2) {
+			fputs("\n\t<<\n", ctx->fd);
+			fprintf(ctx->fd, "\t /Predictor %u\n", predictor);
+			fprintf(ctx->fd, "\t /Columns %lu\n",
+			    (unsigned long) tile_width);
+			fprintf(ctx->fd, "\t /Colors %u\n", ctx->samplesperpixel);
+			fprintf(ctx->fd, "\t /BitsPerComponent %u\n",
+			    ctx->bitspersample);
+			fputs("\t>>", ctx->fd);
+		}
+		fputs(" /LZWDecode filter", ctx->fd);
+		break;
+	case COMPRESSION_DEFLATE:	/* 5: ZIP */
+	case COMPRESSION_ADOBE_DEFLATE:
+		if ( ctx->level3 ) {
+			 TIFFGetFieldDefaulted(tif, TIFFTAG_PREDICTOR, &predictor);
+			 if (predictor > 1) {
+				fprintf(ctx->fd, "\t %% PostScript Level 3 only.");
+				fputs("\n\t<<\n", ctx->fd);
+				fprintf(ctx->fd, "\t /Predictor %u\n", predictor);
+				fprintf(ctx->fd, "\t /Columns %lu\n",
+					(unsigned long) tile_width);
+				fprintf(ctx->fd, "\t /Colors %u\n", ctx->samplesperpixel);
+					fprintf(ctx->fd, "\t /BitsPerComponent %u\n",
+					ctx->bitspersample);
+				fputs("\t>>", ctx->fd);
+			 }
+			 fputs(" /FlateDecode filter", ctx->fd);
+		} else {
+			use_rawdata = FALSE ;
+		}
+		break;
+	case COMPRESSION_PACKBITS:	/* 32773: Macintosh RLE */
+		fputs(" /RunLengthDecode filter", ctx->fd);
+		use_rawdata = TRUE;
+	    break;
+	case COMPRESSION_OJPEG:		/* 6: !6.0 JPEG */
+	case COMPRESSION_JPEG:		/* 7: %JPEG DCT ctx->compression */
+#ifdef notdef
+		/*
+		 * Code not tested yet
+		 */
+		fputs(" /DCTDecode filter", ctx->fd);
+		use_rawdata = TRUE;
+#else
+		use_rawdata = FALSE;
+#endif
+		break;
+	case COMPRESSION_NEXT:		/* 32766: NeXT 2-bit RLE */
+	case COMPRESSION_THUNDERSCAN:	/* 32809: ThunderScan RLE */
+	case COMPRESSION_PIXARFILM:	/* 32908: Pixar companded 10bit LZW */
+	case COMPRESSION_JBIG:		/* 34661: ISO JBIG */
+		use_rawdata = FALSE;
+		break;
+	case COMPRESSION_SGILOG:	/* 34676: SGI LogL or LogLuv */
+	case COMPRESSION_SGILOG24:	/* 34677: SGI 24-bit LogLuv */
+		use_rawdata = FALSE;
+		break;
+	default:
+		/*
+		 * ERROR...
+		 */
+		use_rawdata = FALSE;
+		break;
+	}
+	if (ctx->planarconfiguration == PLANARCONFIG_SEPARATE &&
+	    ctx->samplesperpixel > 1) {
+		uint16 i;
+
+		/*
+		 * NOTE: This code does not work yet...
+		 */
+		for (i = 1; i < ctx->samplesperpixel; i++)
+			fputs(" dup", ctx->fd);
+		fputs(" ]", ctx->fd);
+	}
+
+	fprintf( ctx->fd, "\n >> %s\n", imageOp );
+	if (ctx->ascii85)
+		fputs(" im_stream status { im_stream flushfile } if\n", ctx->fd);
+	if (repeat_count > 1) {
+		if (tile_width < w) {
+			fprintf(ctx->fd, " /im_x im_x %lu add def\n",
+			    (unsigned long) tile_width);
+			if (tile_height < h) {
+				fprintf(ctx->fd, " im_x %lu ge {\n",
+				    (unsigned long) w);
+				fputs("  /im_x 0 def\n", ctx->fd);
+				fprintf(ctx->fd, " /im_y im_y %lu add def\n",
+				    (unsigned long) tile_height);
+				fputs(" } if\n", ctx->fd);
+			}
+		}
+		if (tile_height < h) {
+			if (tile_width >= w) {
+				fprintf(ctx->fd, " /im_y im_y %lu add def\n",
+				    (unsigned long) tile_height);
+				if (!TIFFIsTiled(tif)) {
+					fprintf(ctx->fd, " /im_h %lu im_y sub",
+					    (unsigned long) h);
+					fprintf(ctx->fd, " dup %lu gt { pop",
+					    (unsigned long) tile_height);
+					fprintf(ctx->fd, " %lu } if def\n",
+					    (unsigned long) tile_height);
+				}
+			}
+		}
+		fputs("} repeat\n", ctx->fd);
+	}
+	/*
+	 * End of exec function
+	 */
+	fputs("}\n", ctx->fd);
+
+	return(use_rawdata);
+}
+
+#define MAXLINE		36
+
+static int
+PS_Lvl2page(TIFF2PSContext* ctx, TIFF* tif, uint32 w, uint32 h)
+{
+	uint16 fillorder;
+	int use_rawdata, tiled_image, breaklen = MAXLINE;
+	uint32 chunk_no, num_chunks, *bc;
+	unsigned char *buf_data, *cp;
+	tsize_t chunk_size, byte_count;
+
+#if defined( EXP_ASCII85ENCODER )
+	int			ascii85_l;	/* Length, in bytes, of ascii85_p[] data */
+	uint8		*	ascii85_p = 0;	/* Holds ASCII85 encoded data */
+#endif
+
+	PS_Lvl2colorspace(ctx, tif);
+	use_rawdata = PS_Lvl2ImageDict(ctx, tif, w, h);
+
+/* See http://bugzilla.remotesensing.org/show_bug.cgi?id=80 */
+#ifdef ENABLE_BROKEN_BEGINENDDATA
+	fputs("%%BeginData:\n", ctx->fd);
+#endif
+	fputs("exec\n", ctx->fd);
+
+	tiled_image = TIFFIsTiled(tif);
+	if (tiled_image) {
+		num_chunks = TIFFNumberOfTiles(tif);
+		TIFFGetField(tif, TIFFTAG_TILEBYTECOUNTS, &bc);
+	} else {
+		num_chunks = TIFFNumberOfStrips(tif);
+		TIFFGetField(tif, TIFFTAG_STRIPBYTECOUNTS, &bc);
+	}
+
+	if (use_rawdata) {
+		chunk_size = (tsize_t) bc[0];
+		for (chunk_no = 1; chunk_no < num_chunks; chunk_no++)
+			if ((tsize_t) bc[chunk_no] > chunk_size)
+				chunk_size = (tsize_t) bc[chunk_no];
+	} else {
+		if (tiled_image)
+			chunk_size = TIFFTileSize(tif);
+		else
+			chunk_size = TIFFStripSize(tif);
+	}
+	buf_data = (unsigned char *)_TIFFmalloc(chunk_size);
+	if (!buf_data) {
+		TIFFError(ctx->filename, "Can't alloc %u bytes for %s.",
+			chunk_size, tiled_image ? "tiles" : "strips");
+		return(FALSE);
+	}
+
+#if defined( EXP_ASCII85ENCODER )
+	if ( ctx->ascii85 ) {
+	    /*
+	     * Allocate a buffer to hold the ASCII85 encoded data.  Note
+	     * that it is allocated with sufficient room to hold the
+	     * encoded data (5*chunk_size/4) plus the EOD marker (+8)
+	     * and formatting line breaks.  The line breaks are more
+	     * than taken care of by using 6*chunk_size/4 rather than
+	     * 5*chunk_size/4.
+	     */
+
+	    ascii85_p = _TIFFmalloc( (chunk_size+(chunk_size/2)) + 8 );
+
+	    if ( !ascii85_p ) {
+		_TIFFfree( buf_data );
+
+		TIFFError( ctx->filename,
+			   "Cannot allocate ASCII85 encoding buffer." );
+		return ( FALSE );
+	    }
+	}
+#endif
+
+	TIFFGetFieldDefaulted(tif, TIFFTAG_FILLORDER, &fillorder);
+	for (chunk_no = 0; chunk_no < num_chunks; chunk_no++) {
+		if (ctx->ascii85)
+			Ascii85Init(ctx);
+		else
+			breaklen = MAXLINE;
+		if (use_rawdata) {
+			if (tiled_image)
+				byte_count = TIFFReadRawTile(tif, chunk_no,
+						  buf_data, chunk_size);
+			else
+				byte_count = TIFFReadRawStrip(tif, chunk_no,
+						  buf_data, chunk_size);
+			if (fillorder == FILLORDER_LSB2MSB)
+			    TIFFReverseBits(buf_data, byte_count);
+		} else {
+			if (tiled_image)
+				byte_count = TIFFReadEncodedTile(tif,
+						chunk_no, buf_data,
+						chunk_size);
+			else
+				byte_count = TIFFReadEncodedStrip(tif,
+						chunk_no, buf_data,
+						chunk_size);
+		}
+		if (byte_count < 0) {
+			TIFFError(ctx->filename, "Can't read %s %d.",
+				tiled_image ? "tile" : "strip", chunk_no);
+			if (ctx->ascii85)
+				Ascii85Put(ctx, '\0');
+		}
+		/*
+		 * For images with ctx->alpha, matte against a white background;
+		 * i.e. Cback * (1 - Aimage) where Cback = 1. We will fill the
+		 * lower part of the buffer with the modified values.
+		 *
+		 * XXX: needs better solution
+		 */
+		if (ctx->alpha) {
+			int adjust, i, j = 0;
+			int ncomps = ctx->samplesperpixel - ctx->extrasamples;
+			for (i = 0; i < byte_count; i+=ctx->samplesperpixel) {
+				adjust = 255 - buf_data[i + ncomps];
+				switch (ncomps) {
+					case 1:
+						buf_data[j++] = buf_data[i] + adjust;
+						break;
+					case 2:
+						buf_data[j++] = buf_data[i] + adjust;
+						buf_data[j++] = buf_data[i+1] + adjust;
+						break;
+					case 3:
+						buf_data[j++] = buf_data[i] + adjust;
+						buf_data[j++] = buf_data[i+1] + adjust;
+						buf_data[j++] = buf_data[i+2] + adjust;
+						break;
+				}
+			}
+			byte_count -= j;
+		}
+
+		if (ctx->ascii85) {
+#if defined( EXP_ASCII85ENCODER )
+			ascii85_l = Ascii85EncodeBlock(ctx, ascii85_p, 1,
+						       buf_data, byte_count);
+
+			if ( ascii85_l > 0 )
+				fwrite( ascii85_p, ascii85_l, 1, ctx->fd );
+#else
+			for (cp = buf_data; byte_count > 0; byte_count--)
+				Ascii85Put(ctx, *cp++);
+#endif
+		}
+		else
+		{
+			for (cp = buf_data; byte_count > 0; byte_count--) {
+				putc(hex[((*cp)>>4)&0xf], ctx->fd);
+				putc(hex[(*cp)&0xf], ctx->fd);
+				cp++;
+
+				if (--breaklen <= 0) {
+					putc('\n', ctx->fd);
+					breaklen = MAXLINE;
+				}
+			}
+		}
+
+		if ( !ctx->ascii85 ) {
+			if ( ctx->level2 || ctx->level3 )
+				putc( '>', ctx->fd );
+			putc('\n', ctx->fd);
+		}
+#if !defined( EXP_ASCII85ENCODER )
+		else
+			Ascii85Flush(ctx);
+#endif
+	}
+
+#if defined( EXP_ASCII85ENCODER )
+	if ( ascii85_p )
+	    _TIFFfree( ascii85_p );
+#endif
+	_TIFFfree(buf_data);
+#ifdef ENABLE_BROKEN_BEGINENDDATA
+	fputs("%%EndData\n", ctx->fd);
+#endif
+	return(TRUE);
+}
+
+void
+PSpage(TIFF2PSContext* ctx, TIFF* tif, uint32 w, uint32 h)
+{
+	char *imageOp = "image";
+
+	if ( ctx->useImagemask && (ctx->bitspersample == 1) )
+		imageOp = "imagemask";
+
+	if ((ctx->level2 || ctx->level3) && PS_Lvl2page(ctx, tif, w, h))
+		return;
+	ctx->ps_bytesperrow = ctx->tf_bytesperrow - (ctx->extrasamples * ctx->bitspersample / 8)*w;
+	switch (ctx->photometric) {
+	case PHOTOMETRIC_RGB:
+		if (ctx->planarconfiguration == PLANARCONFIG_CONTIG) {
+			fprintf(ctx->fd, "%s", RGBcolorimage);
+			PSColorContigPreamble(ctx, w, h, 3);
+			PSDataColorContig(ctx, tif, w, h, 3);
+		} else {
+			PSColorSeparatePreamble(ctx, w, h, 3);
+			PSDataColorSeparate(ctx, tif, w, h, 3);
+		}
+		break;
+	case PHOTOMETRIC_SEPARATED:
+		/* XXX should emit CMYKcolorimage */
+		if (ctx->planarconfiguration == PLANARCONFIG_CONTIG) {
+			PSColorContigPreamble(ctx, w, h, 4);
+			PSDataColorContig(ctx, tif, w, h, 4);
+		} else {
+			PSColorSeparatePreamble(ctx, w, h, 4);
+			PSDataColorSeparate(ctx, tif, w, h, 4);
+		}
+		break;
+	case PHOTOMETRIC_PALETTE:
+		fprintf(ctx->fd, "%s", RGBcolorimage);
+		PhotoshopBanner(ctx, w, h, 1, 3, "false 3 colorimage");
+		fprintf(ctx->fd, "/scanLine %ld string def\n",
+			(long) ctx->ps_bytesperrow * 3L);
+		fprintf(ctx->fd, "%lu %lu 8\n",
+			(unsigned long) w, (unsigned long) h);
+		fprintf(ctx->fd, "[%lu 0 0 -%lu 0 %lu]\n",
+			(unsigned long) w, (unsigned long) h,
+			(unsigned long) h);
+		fprintf(ctx->fd,
+			"{currentfile scanLine readhexstring pop} bind\n");
+		fprintf(ctx->fd, "false 3 colorimage\n");
+		PSDataPalette(ctx, tif, w, h);
+		break;
+	case PHOTOMETRIC_MINISBLACK:
+	case PHOTOMETRIC_MINISWHITE:
+		PhotoshopBanner(ctx, w, h, 1, 1, imageOp);
+		fprintf(ctx->fd, "/scanLine %ld string def\n",
+		    (long) ctx->ps_bytesperrow);
+		fprintf(ctx->fd, "%lu %lu %d\n",
+		    (unsigned long) w, (unsigned long) h, ctx->bitspersample);
+		fprintf(ctx->fd, "[%lu 0 0 -%lu 0 %lu]\n",
+		    (unsigned long) w, (unsigned long) h, (unsigned long) h);
+		fprintf(ctx->fd,
+		    "{currentfile scanLine readhexstring pop} bind\n");
+		fprintf(ctx->fd, "%s\n", imageOp);
+		PSDataBW(ctx, tif, w, h);
+		break;
+	}
+	putc('\n', ctx->fd);
+}
+
+void
+PSColorContigPreamble(TIFF2PSContext* ctx, uint32 w, uint32 h, int nc)
+{
+	ctx->ps_bytesperrow = nc * (ctx->tf_bytesperrow / ctx->samplesperpixel);
+	PhotoshopBanner(ctx, w, h, 1, nc, "false %d colorimage");
+	fprintf(ctx->fd, "/line %ld string def\n", (long) ctx->ps_bytesperrow);
+	fprintf(ctx->fd, "%lu %lu %d\n",
+	    (unsigned long) w, (unsigned long) h, ctx->bitspersample);
+	fprintf(ctx->fd, "[%lu 0 0 -%lu 0 %lu]\n",
+	    (unsigned long) w, (unsigned long) h, (unsigned long) h);
+	fprintf(ctx->fd, "{currentfile line readhexstring pop} bind\n");
+	fprintf(ctx->fd, "false %d colorimage\n", nc);
+}
+
+void
+PSColorSeparatePreamble(TIFF2PSContext* ctx, uint32 w, uint32 h, int nc)
+{
+	int i;
+
+	PhotoshopBanner(ctx, w, h, ctx->ps_bytesperrow, nc, "true %d colorimage");
+	for (i = 0; i < nc; i++)
+		fprintf(ctx->fd, "/line%d %ld string def\n",
+		    i, (long) ctx->ps_bytesperrow);
+	fprintf(ctx->fd, "%lu %lu %d\n",
+	    (unsigned long) w, (unsigned long) h, ctx->bitspersample);
+	fprintf(ctx->fd, "[%lu 0 0 -%lu 0 %lu] \n",
+	    (unsigned long) w, (unsigned long) h, (unsigned long) h);
+	for (i = 0; i < nc; i++)
+		fprintf(ctx->fd, "{currentfile line%d readhexstring pop}bind\n", i);
+	fprintf(ctx->fd, "true %d colorimage\n", nc);
+}
+
+#define	DOBREAK(len, howmany, fd) \
+	if (((len) -= (howmany)) <= 0) {	\
+		putc('\n', fd);			\
+		(len) = MAXLINE-(howmany);	\
+	}
+#define	PUTHEX(c,fd)	putc(hex[((c)>>4)&0xf],fd); putc(hex[(c)&0xf],fd)
+
+void
+PSDataColorContig(TIFF2PSContext* ctx, TIFF* tif, uint32 w, uint32 h, int nc)
+{
+	uint32 row;
+	int breaklen = MAXLINE, cc, es = ctx->samplesperpixel - nc;
+	unsigned char *tf_buf;
+	unsigned char *cp, c;
+
+	(void) w;
+	tf_buf = (unsigned char *) _TIFFmalloc(ctx->tf_bytesperrow);
+	if (tf_buf == NULL) {
+		TIFFError(ctx->filename, "No space for scanline buffer");
+		return;
+	}
+	for (row = 0; row < h; row++) {
+		if (TIFFReadScanline(tif, tf_buf, row, 0) < 0)
+			break;
+		cp = tf_buf;
+		if (ctx->alpha) {
+			int adjust;
+			cc = 0;
+			for (; cc < ctx->tf_bytesperrow; cc += ctx->samplesperpixel) {
+				DOBREAK(breaklen, nc, ctx->fd);
+				/*
+				 * For images with ctx->alpha, matte against
+				 * a white background; i.e.
+				 *    Cback * (1 - Aimage)
+				 * where Cback = 1.
+				 */
+				adjust = 255 - cp[nc];
+				switch (nc) {
+				case 4: c = *cp++ + adjust; PUTHEX(c,ctx->fd);
+				case 3: c = *cp++ + adjust; PUTHEX(c,ctx->fd);
+				case 2: c = *cp++ + adjust; PUTHEX(c,ctx->fd);
+				case 1: c = *cp++ + adjust; PUTHEX(c,ctx->fd);
+				}
+				cp += es;
+			}
+		} else {
+			cc = 0;
+			for (; cc < ctx->tf_bytesperrow; cc += ctx->samplesperpixel) {
+				DOBREAK(breaklen, nc, ctx->fd);
+				switch (nc) {
+				case 4: c = *cp++; PUTHEX(c,ctx->fd);
+				case 3: c = *cp++; PUTHEX(c,ctx->fd);
+				case 2: c = *cp++; PUTHEX(c,ctx->fd);
+				case 1: c = *cp++; PUTHEX(c,ctx->fd);
+				}
+				cp += es;
+			}
+		}
+	}
+	_TIFFfree((char *) tf_buf);
+}
+
+void
+PSDataColorSeparate(TIFF2PSContext* ctx, TIFF* tif, uint32 w, uint32 h, int nc)
+{
+	uint32 row;
+	int breaklen = MAXLINE, cc;
+	tsample_t s, maxs;
+	unsigned char *tf_buf;
+	unsigned char *cp, c;
+
+	(void) w;
+	tf_buf = (unsigned char *) _TIFFmalloc(ctx->tf_bytesperrow);
+	if (tf_buf == NULL) {
+		TIFFError(ctx->filename, "No space for scanline buffer");
+		return;
+	}
+	maxs = (ctx->samplesperpixel > nc ? nc : ctx->samplesperpixel);
+	for (row = 0; row < h; row++) {
+		for (s = 0; s < maxs; s++) {
+			if (TIFFReadScanline(tif, tf_buf, row, s) < 0)
+				break;
+			for (cp = tf_buf, cc = 0; cc < ctx->tf_bytesperrow; cc++) {
+				DOBREAK(breaklen, 1, ctx->fd);
+				c = *cp++;
+				PUTHEX(c,ctx->fd);
+			}
+		}
+	}
+	_TIFFfree((char *) tf_buf);
+}
+
+#define	PUTRGBHEX(c,fd) \
+	PUTHEX(rmap[c],fd); PUTHEX(gmap[c],fd); PUTHEX(bmap[c],fd)
+
+void
+PSDataPalette(TIFF2PSContext* ctx, TIFF* tif, uint32 w, uint32 h)
+{
+	uint16 *rmap, *gmap, *bmap;
+	uint32 row;
+	int breaklen = MAXLINE, cc, nc;
+	unsigned char *tf_buf;
+	unsigned char *cp, c;
+
+	(void) w;
+	if (!TIFFGetField(tif, TIFFTAG_COLORMAP, &rmap, &gmap, &bmap)) {
+		TIFFError(ctx->filename, "Palette image w/o \"Colormap\" tag");
+		return;
+	}
+	switch (ctx->bitspersample) {
+	case 8:	case 4: case 2: case 1:
+		break;
+	default:
+		TIFFError(ctx->filename, "Depth %d not supported", ctx->bitspersample);
+		return;
+	}
+	nc = 3 * (8 / ctx->bitspersample);
+	tf_buf = (unsigned char *) _TIFFmalloc(ctx->tf_bytesperrow);
+	if (tf_buf == NULL) {
+		TIFFError(ctx->filename, "No space for scanline buffer");
+		return;
+	}
+	if (checkcmap(ctx, tif, 1<<ctx->bitspersample, rmap, gmap, bmap) == 16) {
+		int i;
+#define	CVT(x)		((unsigned short) (((x) * 255) / ((1U<<16)-1)))
+		for (i = (1<<ctx->bitspersample)-1; i >= 0; i--) {
+			rmap[i] = CVT(rmap[i]);
+			gmap[i] = CVT(gmap[i]);
+			bmap[i] = CVT(bmap[i]);
+		}
+#undef CVT
+	}
+	for (row = 0; row < h; row++) {
+		if (TIFFReadScanline(tif, tf_buf, row, 0) < 0)
+			break;
+		for (cp = tf_buf, cc = 0; cc < ctx->tf_bytesperrow; cc++) {
+			DOBREAK(breaklen, nc, ctx->fd);
+			switch (ctx->bitspersample) {
+			case 8:
+				c = *cp++; PUTRGBHEX(c, ctx->fd);
+				break;
+			case 4:
+				c = *cp++; PUTRGBHEX(c&0xf, ctx->fd);
+				c >>= 4;   PUTRGBHEX(c, ctx->fd);
+				break;
+			case 2:
+				c = *cp++; PUTRGBHEX(c&0x3, ctx->fd);
+				c >>= 2;   PUTRGBHEX(c&0x3, ctx->fd);
+				c >>= 2;   PUTRGBHEX(c&0x3, ctx->fd);
+				c >>= 2;   PUTRGBHEX(c, ctx->fd);
+				break;
+			case 1:
+				c = *cp++; PUTRGBHEX(c&0x1, ctx->fd);
+				c >>= 1;   PUTRGBHEX(c&0x1, ctx->fd);
+				c >>= 1;   PUTRGBHEX(c&0x1, ctx->fd);
+				c >>= 1;   PUTRGBHEX(c&0x1, ctx->fd);
+				c >>= 1;   PUTRGBHEX(c&0x1, ctx->fd);
+				c >>= 1;   PUTRGBHEX(c&0x1, ctx->fd);
+				c >>= 1;   PUTRGBHEX(c&0x1, ctx->fd);
+				c >>= 1;   PUTRGBHEX(c, ctx->fd);
+				break;
+			}
+		}
+	}
+	_TIFFfree((char *) tf_buf);
+}
+
+void
+PSDataBW(TIFF2PSContext* ctx, TIFF* tif, uint32 w, uint32 h)
+{
+	int breaklen = MAXLINE;
+	unsigned char* tf_buf;
+	unsigned char* cp;
+	tsize_t stripsize = TIFFStripSize(tif);
+	tstrip_t s;
+
+#if defined( EXP_ASCII85ENCODER )
+	int	ascii85_l;		/* Length, in bytes, of ascii85_p[] data */
+	uint8	*ascii85_p = 0;		/* Holds ASCII85 encoded data */
+#endif
+
+	(void) w; (void) h;
+	tf_buf = (unsigned char *) _TIFFmalloc(stripsize);
+        memset(tf_buf, 0, stripsize);
+	if (tf_buf == NULL) {
+		TIFFError(ctx->filename, "No space for scanline buffer");
+		return;
+	}
+
+#if defined( EXP_ASCII85ENCODER )
+	if ( ctx->ascii85 ) {
+	    /*
+	     * Allocate a buffer to hold the ASCII85 encoded data.  Note
+	     * that it is allocated with sufficient room to hold the
+	     * encoded data (5*stripsize/4) plus the EOD marker (+8)
+	     * and formatting line breaks.  The line breaks are more
+	     * than taken care of by using 6*stripsize/4 rather than
+	     * 5*stripsize/4.
+	     */
+
+	    ascii85_p = _TIFFmalloc( (stripsize+(stripsize/2)) + 8 );
+
+	    if ( !ascii85_p ) {
+		_TIFFfree( tf_buf );
+
+		TIFFError( ctx->filename,
+			   "Cannot allocate ASCII85 encoding buffer." );
+		return;
+	    }
+	}
+#endif
+
+	if (ctx->ascii85)
+		Ascii85Init(ctx);
+
+	for (s = 0; s < TIFFNumberOfStrips(tif); s++) {
+		int cc = TIFFReadEncodedStrip(tif, s, tf_buf, stripsize);
+		if (cc < 0) {
+			TIFFError(ctx->filename, "Can't read strip");
+			break;
+		}
+		cp = tf_buf;
+		if (ctx->photometric == PHOTOMETRIC_MINISWHITE) {
+			for (cp += cc; --cp >= tf_buf;)
+				*cp = ~*cp;
+			cp++;
+		}
+		if (ctx->ascii85) {
+#if defined( EXP_ASCII85ENCODER )
+			if (ctx->alpha) {
+				int adjust, i;
+				for (i = 0; i < cc; i+=2) {
+					adjust = 255 - cp[i + 1];
+				    cp[i / 2] = cp[i] + adjust;
+				}
+				cc /= 2;
+			}
+
+			ascii85_l = Ascii85EncodeBlock(ctx, ascii85_p, 1, cp,
+						       cc);
+
+			if ( ascii85_l > 0 )
+			    fwrite( ascii85_p, ascii85_l, 1, ctx->fd );
+#else
+			while (cc-- > 0)
+				Ascii85Put(ctx, *cp++);
+#endif /* EXP_ASCII85_ENCODER */
+		} else {
+			unsigned char c;
+
+			if (ctx->alpha) {
+				int adjust;
+				while (cc-- > 0) {
+					DOBREAK(breaklen, 1, ctx->fd);
+					/*
+					 * For images with ctx->alpha, matte against
+					 * a white background; i.e.
+					 *    Cback * (1 - Aimage)
+					 * where Cback = 1.
+					 */
+					adjust = 255 - cp[1];
+					c = *cp++ + adjust; PUTHEX(c,ctx->fd);
+					cp++, cc--;
+				}
+			} else {
+				while (cc-- > 0) {
+					c = *cp++;
+					DOBREAK(breaklen, 1, ctx->fd);
+					PUTHEX(c, ctx->fd);
+				}
+			}
+		}
+	}
+
+	if ( !ctx->ascii85 )
+	{
+	    if ( ctx->level2 || ctx->level3)
+		fputs(">\n", ctx->fd);
+	}
+#if !defined( EXP_ASCII85ENCODER )
+	else
+	    Ascii85Flush(ctx);
+#else
+	if ( ascii85_p )
+	    _TIFFfree( ascii85_p );
+#endif
+
+	_TIFFfree(tf_buf);
+}
+
+static void
+Ascii85Init(TIFF2PSContext *ctx)
+{
+	ctx->ascii85breaklen = 2*MAXLINE;
+	ctx->ascii85count = 0;
+}
+
+static void
+Ascii85Encode(unsigned char* raw, char *buf)
+{
+	uint32 word;
+
+	word = (((raw[0]<<8)+raw[1])<<16) + (raw[2]<<8) + raw[3];
+	if (word != 0L) {
+		uint32 q;
+		uint16 w1;
+
+		q = word / (85L*85*85*85);	/* actually only a byte */
+		buf[0] = (char) (q + '!');
+
+		word -= q * (85L*85*85*85); q = word / (85L*85*85);
+		buf[1] = (char) (q + '!');
+
+		word -= q * (85L*85*85); q = word / (85*85);
+		buf[2] = (char) (q + '!');
+
+		w1 = (uint16) (word - q*(85L*85));
+		buf[3] = (char) ((w1 / 85) + '!');
+		buf[4] = (char) ((w1 % 85) + '!');
+		buf[5] = '\0';
+	} else
+		buf[0] = 'z', buf[1] = '\0';
+}
+
+void
+Ascii85Put(TIFF2PSContext *ctx, unsigned char code)
+{
+	ctx->ascii85buf[ctx->ascii85count++] = code;
+	if (ctx->ascii85count >= 4) {
+		unsigned char* p;
+		int n;
+		char buf[6];
+
+		for (n = ctx->ascii85count, p = ctx->ascii85buf;
+		     n >= 4; n -= 4, p += 4) {
+			char* cp;
+			Ascii85Encode(p, buf);
+			for (cp = buf; *cp; cp++) {
+				putc(*cp, ctx->fd);
+				if (--ctx->ascii85breaklen == 0) {
+					putc('\n', ctx->fd);
+					ctx->ascii85breaklen = 2*MAXLINE;
+				}
+			}
+		}
+		_TIFFmemcpy(ctx->ascii85buf, p, n);
+		ctx->ascii85count = n;
+	}
+}
+
+void
+Ascii85Flush(TIFF2PSContext* ctx)
+{
+	if (ctx->ascii85count > 0) {
+		char res[6];
+		_TIFFmemset(&ctx->ascii85buf[ctx->ascii85count], 0, 3);
+		Ascii85Encode(ctx->ascii85buf, res);
+		fwrite(res[0] == 'z' ? "!!!!" : res, ctx->ascii85count + 1, 1, ctx->fd);
+	}
+	fputs("~>\n", ctx->fd);
+}
+#if	defined( EXP_ASCII85ENCODER)
+
+#define A85BREAKCNTR    ctx->ascii85breaklen
+#define A85BREAKLEN     (2*MAXLINE)
+
+/*****************************************************************************
+*
+* Name:         Ascii85EncodeBlock( ascii85_p, f_eod, raw_p, raw_l )
+*
+* Description:  This routine will encode the raw data in the buffer described
+*               by raw_p and raw_l into ASCII85 format and store the encoding
+*               in the buffer given by ascii85_p.
+*
+* Parameters:   ctx         -   TIFF2PS context
+*               ascii85_p   -   A buffer supplied by the caller which will
+*                               contain the encoded ASCII85 data.
+*               f_eod       -   Flag: Nz means to end the encoded buffer with
+*                               an End-Of-Data marker.
+*               raw_p       -   Pointer to the buffer of data to be encoded
+*               raw_l       -   Number of bytes in raw_p[] to be encoded
+*
+* Returns:      (int)   <   0   Error, see errno
+*                       >=  0   Number of bytes written to ascii85_p[].
+*
+* Notes:        An external variable given by A85BREAKCNTR is used to
+*               determine when to insert newline characters into the
+*               encoded data.  As each byte is placed into ascii85_p this
+*               external is decremented.  If the variable is decrement to
+*               or past zero then a newline is inserted into ascii85_p
+*               and the A85BREAKCNTR is then reset to A85BREAKLEN.
+*                   Note:  for efficiency reasons the A85BREAKCNTR variable
+*                          is not actually checked on *every* character
+*                          placed into ascii85_p but often only for every
+*                          5 characters.
+*
+*               THE CALLER IS RESPONSIBLE FOR ENSURING THAT ASCII85_P[] IS
+*               SUFFICIENTLY LARGE TO THE ENCODED DATA!
+*                   You will need at least 5 * (raw_l/4) bytes plus space for
+*                   newline characters and space for an EOD marker (if
+*                   requested).  A safe calculation is to use 6*(raw_l/4) + 8
+*                   to size ascii85_p.
+*
+*****************************************************************************/
+
+int Ascii85EncodeBlock( TIFF2PSContext *ctx, uint8 * ascii85_p,
+			unsigned f_eod, const uint8 * raw_p, int raw_l )
+
+{
+    char                        ascii85[5];     /* Encoded 5 tuple */
+    int                         ascii85_l;      /* Number of bytes written to ascii85_p[] */
+    int                         rc;             /* Return code */
+    uint32                      val32;          /* Unencoded 4 tuple */
+
+    ascii85_l = 0;                              /* Nothing written yet */
+
+    if ( raw_p )
+    {
+        --raw_p;                                /* Prepare for pre-increment fetches */
+
+        for ( ; raw_l > 3; raw_l -= 4 )
+        {
+            val32  = *(++raw_p) << 24;
+            val32 += *(++raw_p) << 16;
+            val32 += *(++raw_p) <<  8;
+            val32 += *(++raw_p);
+
+            if ( val32 == 0 )                   /* Special case */
+            {
+                ascii85_p[ascii85_l] = 'z';
+                rc = 1;
+            }
+
+            else
+            {
+                ascii85[4] = (char) ((val32 % 85) + 33);
+                val32 /= 85;
+
+                ascii85[3] = (char) ((val32 % 85) + 33);
+                val32 /= 85;
+
+                ascii85[2] = (char) ((val32 % 85) + 33);
+                val32 /= 85;
+
+                ascii85[1] = (char) ((val32 % 85) + 33);
+                ascii85[0] = (char) ((val32 / 85) + 33);
+
+                _TIFFmemcpy( &ascii85_p[ascii85_l], ascii85, sizeof(ascii85) );
+                rc = sizeof(ascii85);
+            }
+
+            ascii85_l += rc;
+
+            if ( (A85BREAKCNTR -= rc) <= 0 )
+            {
+                ascii85_p[ascii85_l] = '\n';
+                ++ascii85_l;
+                A85BREAKCNTR = A85BREAKLEN;
+            }
+        }
+
+        /*
+         * Output any straggler bytes:
+         */
+
+        if ( raw_l > 0 )
+        {
+            int             len;                /* Output this many bytes */
+
+            len = raw_l + 1;
+            val32 = *++raw_p << 24;             /* Prime the pump */
+
+            if ( --raw_l > 0 )  val32 += *(++raw_p) << 16;
+            if ( --raw_l > 0 )  val32 += *(++raw_p) <<  8;
+
+            val32 /= 85;
+
+            ascii85[3] = (char) ((val32 % 85) + 33);
+            val32 /= 85;
+
+            ascii85[2] = (char) ((val32 % 85) + 33);
+            val32 /= 85;
+
+            ascii85[1] = (char) ((val32 % 85) + 33);
+            ascii85[0] = (char) ((val32 / 85) + 33);
+
+            _TIFFmemcpy( &ascii85_p[ascii85_l], ascii85, len );
+            ascii85_l += len;
+        }
+    }
+
+    /*
+     * If requested add an ASCII85 End Of Data marker:
+     */
+
+    if ( f_eod )
+    {
+        ascii85_p[ascii85_l++] = '~';
+        ascii85_p[ascii85_l++] = '>';
+        ascii85_p[ascii85_l++] = '\n';
+    }
+
+    return ( ascii85_l );
+
+}   /* Ascii85EncodeBlock() */
+
+#endif	/* EXP_ASCII85ENCODER */
+
+/* vim: set ts=8 sts=8 sw=8 noet: */