From: Matthew S. Wilson <msw@rpath.com>
Date: Mon, 4 Jul 2005 19:19:34 +0000 (+0000)
Subject: use the new tiff2ps interfaces
X-Git-Tag: EVINCE_0_3_3~173
X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?a=commitdiff_plain;h=efa870dac2fdad4dd736b16e79b3c8e4e33b6055;p=evince.git

use the new tiff2ps interfaces

2005-07-04  Matthew S. Wilson  <msw@rpath.com>

	* tiff/tiff-document.c (tiff_document_ps_export_begin)
	(tiff_document_ps_export_do_page, tiff_document_ps_export_end):
	use the new tiff2ps interfaces

	* tiff/tiff2ps.h (tiff2ps_context_new, tiff2ps_process_page)
	(tiff2ps_context_finalize): implement new interfaces for tiff2ps

	* tiff/tiff2ps.c: refactor tiff2ps code to use a context
	structure instead of global variables.  Remove use of static
	variables in functions.
---

diff --git a/ChangeLog b/ChangeLog
index d5f16234..019aaa1b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,16 @@
+2005-07-04  Matthew S. Wilson  <msw@rpath.com>
+
+	* tiff/tiff-document.c (tiff_document_ps_export_begin) 
+	(tiff_document_ps_export_do_page, tiff_document_ps_export_end):
+	use the new tiff2ps interfaces
+
+	* tiff/tiff2ps.h (tiff2ps_context_new, tiff2ps_process_page) 
+	(tiff2ps_context_finalize): implement new interfaces for tiff2ps
+
+	* tiff/tiff2ps.c: refactor tiff2ps code to use a context
+	structure instead of global variables.  Remove use of static
+	variables in functions.
+
 2005-07-04  Carlos Garcia Campos <carlosgc@gnome.org>
 
 	* shell/ev-page-action.c: unref the completion after setting it to the
diff --git a/tiff/tiff-document.c b/tiff/tiff-document.c
index 137833be..36847aa4 100644
--- a/tiff/tiff-document.c
+++ b/tiff/tiff-document.c
@@ -22,7 +22,6 @@
 
 #include <stdio.h>
 #include <glib.h>
-#include <glib/gstdio.h>
 
 #include "tiffio.h"
 #include "tiff2ps.h"
@@ -43,8 +42,7 @@ struct _TiffDocument
   TIFF *tiff;
   gint n_pages;
   EvOrientation orientation;
-  FILE *ps_export_file;
-  gint ps_export_pages;
+  TIFF2PSContext *ps_export_ctx;
 };
 
 typedef struct _TiffDocumentClass TiffDocumentClass;
@@ -417,10 +415,7 @@ tiff_document_ps_export_begin (EvPSExporter *exporter, const char *filename,
 {
 	TiffDocument *document = TIFF_DOCUMENT (exporter);
 
-	document->ps_export_file = g_fopen (filename, "w");
-	if (document->ps_export_file == NULL)
-		return;
-	document->ps_export_pages = 0;
+	document->ps_export_ctx = tiff2ps_context_new(filename);
 }
 
 static void
@@ -428,14 +423,12 @@ tiff_document_ps_export_do_page (EvPSExporter *exporter, int page)
 {
 	TiffDocument *document = TIFF_DOCUMENT (exporter);
 
-	if (document->ps_export_file == NULL)
+	if (document->ps_export_ctx == NULL)
 		return;
 	if (TIFFSetDirectory (document->tiff, page) != 1)
 		return;
-	TIFF2PS (document->ps_export_file,
-		 document->tiff,
-		 0, 0, 0, 0, 0,
-		 &document->ps_export_pages);
+	tiff2ps_process_page (document->ps_export_ctx, document->tiff,
+			      0, 0, 0, 0, 0);
 }
 
 static void
@@ -443,12 +436,9 @@ tiff_document_ps_export_end (EvPSExporter *exporter)
 {
 	TiffDocument *document = TIFF_DOCUMENT (exporter);
 
-	if (document->ps_export_file == NULL)
+	if (document->ps_export_ctx == NULL)
 		return;
-	if (document->ps_export_pages)
-		TIFFPSTail (document->ps_export_file,
-			    document->ps_export_pages);
-	fclose (document->ps_export_file);
+	tiff2ps_context_finalize(document->ps_export_ctx);
 }
 
 static void
diff --git a/tiff/tiff2ps.c b/tiff/tiff2ps.c
index 58f67daf..3e2bd32e 100644
--- a/tiff/tiff2ps.c
+++ b/tiff/tiff2ps.c
@@ -1,3 +1,4 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
 /* $Id$ */
 
 /*
@@ -29,7 +30,6 @@
  * Matthew S. Wilson <msw@rpath.com>
  * Modifications Copyright (C) 2005 rpath, Inc.
  *
- * FIXME: refactor to remove use of global variables
  */
 
 #include <stdio.h>
@@ -39,6 +39,9 @@
 #include <string.h>
 #include <unistd.h>
 
+#include <glib.h>
+#include <glib/gstdio.h>
+
 #include "tiff2ps.h"
 
 /*
@@ -109,77 +112,110 @@
 #define	FALSE	0
 #endif
 
-static int	ascii85 = FALSE;		/* use ASCII85 encoding */
-static int	interpolate = TRUE;		/* interpolate level2 image */
-static int	level2 = FALSE;			/* generate PostScript level 2 */
-static int	level3 = FALSE;			/* generate PostScript level 3 */
-static int	printAll = FALSE;		/* print all images in file */
-static int	generateEPSF = FALSE;		/* generate Encapsulated PostScript */
-static int	PSduplex = FALSE;		/* enable duplex printing */
-static int	PStumble = FALSE;		/* enable top edge binding */
-static int	PSavoiddeadzone = TRUE;		/* enable avoiding printer deadzone */
-static double	maxPageHeight = 0;		/* maximum size to fit on page */
-static double	splitOverlap = 0;		/* amount for split pages to overlag */
-static int	rotate = FALSE;			/* rotate image by 180 degrees */
-static char	*filename = NULL;               /* input filename */
-static int	useImagemask = FALSE;		/* Use imagemask instead of image operator */
-static uint16	res_unit = 0;			/* Resolution units: 2 - inches, 3 - cm */
 
-/*
- * ASCII85 Encoding Support.
- */
-static unsigned char ascii85buf[10];
-static int	ascii85count;
-static int	ascii85breaklen;
-
-static void	PSpage(FILE*, TIFF*, uint32, uint32);
-static void	PSColorContigPreamble(FILE*, uint32, uint32, int);
-static void	PSColorSeparatePreamble(FILE*, uint32, uint32, int);
-static void	PSDataColorContig(FILE*, TIFF*, uint32, uint32, int);
-static void	PSDataColorSeparate(FILE*, TIFF*, uint32, uint32, int);
-static void	PSDataPalette(FILE*, TIFF*, uint32, uint32);
-static void	PSDataBW(FILE*, TIFF*, uint32, uint32);
-static void	Ascii85Init(void);
-static void	Ascii85Put(unsigned char code, FILE* fd);
-static void	Ascii85Flush(FILE* fd);
-static void    PSHead(FILE*, TIFF*, uint32, uint32, double, double, double, double);
+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;
 
-#if	defined( EXP_ASCII85ENCODER)
-static int Ascii85EncodeBlock( uint8 * ascii85_p, unsigned f_eod, const uint8 * raw_p, int raw_l );
+	/*
+	 * 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
 
-static	uint16 samplesperpixel;
-static	uint16 bitspersample;
-static	uint16 planarconfiguration;
-static	uint16 photometric;
-static	uint16 compression;
-static	uint16 extrasamples;
-static	int alpha;
+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)
+		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(TIFF* tif)
+checkImage(TIFF2PSContext *ctx, TIFF* tif)
 {
-	switch (photometric) {
+	switch (ctx->photometric) {
 	case PHOTOMETRIC_YCBCR:
-		if ((compression == COMPRESSION_JPEG || compression == COMPRESSION_OJPEG)
-			&& planarconfiguration == PLANARCONFIG_CONTIG) {
+		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);
-			photometric = PHOTOMETRIC_RGB;
+			ctx->photometric = PHOTOMETRIC_RGB;
 		} else {
-			if (level2 || level3)
+			if (ctx->level2 || ctx->level3)
 				break;
-			TIFFError(filename, "Can not handle image with %s",
-			    "PhotometricInterpretation=YCbCr");
+			TIFFError(ctx->filename, "Can not handle image with %s",
+			    "Ctx->PhotometricInterpretation=YCbCr");
 			return (0);
 		}
 		/* fall thru... */
 	case PHOTOMETRIC_RGB:
-		if (alpha && bitspersample != 8) {
-			TIFFError(filename,
-			    "Can not handle %d-bit/sample RGB image with alpha",
-			    bitspersample);
+		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... */
@@ -190,40 +226,41 @@ checkImage(TIFF* tif)
 		break;
 	case PHOTOMETRIC_LOGL:
 	case PHOTOMETRIC_LOGLUV:
-		if (compression != COMPRESSION_SGILOG &&
-		    compression != COMPRESSION_SGILOG24) {
-			TIFFError(filename,
-		    "Can not handle %s data with compression other than SGILog",
-			    (photometric == PHOTOMETRIC_LOGL) ?
+		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);
-		photometric = (photometric == PHOTOMETRIC_LOGL) ?
+		ctx->photometric = (ctx->photometric == PHOTOMETRIC_LOGL) ?
 		    PHOTOMETRIC_MINISBLACK : PHOTOMETRIC_RGB;
-		bitspersample = 8;
+		ctx->bitspersample = 8;
 		break;
 	case PHOTOMETRIC_CIELAB:
 		/* fall thru... */
 	default:
-		TIFFError(filename,
-		    "Can not handle image with PhotometricInterpretation=%d",
-		    photometric);
+		TIFFError(ctx->filename,
+		    "Can not handle image with Ctx->PhotometricInterpretation=%d",
+		    ctx->photometric);
 		return (0);
 	}
-	switch (bitspersample) {
+	switch (ctx->bitspersample) {
 	case 1: case 2:
 	case 4: case 8:
 		break;
 	default:
-		TIFFError(filename, "Can not handle %d-bit/sample image",
-		    bitspersample);
+		TIFFError(ctx->filename, "Can not handle %d-bit/sample image",
+		    ctx->bitspersample);
 		return (0);
 	}
-	if (planarconfiguration == PLANARCONFIG_SEPARATE && extrasamples > 0)
-		TIFFWarning(filename, "Ignoring extra samples");
+	if (ctx->planarconfiguration == PLANARCONFIG_SEPARATE &&
+	    ctx->extrasamples > 0)
+		TIFFWarning(ctx->filename, "Ignoring extra samples");
 	return (1);
 }
 
@@ -260,12 +297,13 @@ static	char RGBcolorimage[] = "\
  * It is claimed to be part of some future revision of the EPS spec.
  */
 static void
-PhotoshopBanner(FILE* fd, uint32 w, uint32 h, int bs, int nc, char* startline)
+PhotoshopBanner(TIFF2PSContext* ctx, uint32 w, uint32 h, int bs, int nc,
+		char* startline)
 {
-	fprintf(fd, "%%ImageData: %ld %ld %d %d 0 %d 2 \"",
-	    (long) w, (long) h, bitspersample, nc, bs);
-	fprintf(fd, startline, nc);
-	fprintf(fd, "\"\n");
+	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");
 }
 
 /*
@@ -275,14 +313,15 @@ PhotoshopBanner(FILE* fd, uint32 w, uint32 h, int bs, int nc, char* startline)
  * pprh : image height in PS units (72 dpi)
  */
 static void
-setupPageState(TIFF* tif, uint32* pw, uint32* ph, double* pprw, double* pprh)
+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 (res_unit == 0)
-		TIFFGetFieldDefaulted(tif, TIFFTAG_RESOLUTIONUNIT, &res_unit);
+	if (ctx->res_unit == 0)
+		TIFFGetFieldDefaulted(tif, TIFFTAG_RESOLUTIONUNIT, &ctx->res_unit);
 	/*
 	 * Calculate printable area.
 	 */
@@ -292,7 +331,7 @@ setupPageState(TIFF* tif, uint32* pw, uint32* ph, double* pprw, double* pprh)
 	if (!TIFFGetField(tif, TIFFTAG_YRESOLUTION, &yres)
             || fabs(yres) < 0.0000001)
 		yres = PS_UNIT_SIZE;
-	switch (res_unit) {
+	switch (ctx->res_unit) {
 	case RESUNIT_CENTIMETER:
 		xres *= 2.54F, yres *= 2.54F;
 		break;
@@ -318,10 +357,6 @@ isCCITTCompression(TIFF* tif)
 	    compress == COMPRESSION_CCITTRLEW);
 }
 
-static	tsize_t tf_bytesperrow;
-static	tsize_t ps_bytesperrow;
-static	tsize_t	tf_rowsperstrip;
-static	tsize_t	tf_numberstrips;
 static	char *hex = "0123456789abcdef";
 
 /*
@@ -329,7 +364,7 @@ static	char *hex = "0123456789abcdef";
  * pagewidth & pageheight are inches
  */
 static int
-PlaceImage(FILE *fp, double pagewidth, double pageheight,
+PlaceImage(TIFF2PSContext *ctx, double pagewidth, double pageheight,
 	   double imagewidth, double imageheight, int splitpage,
 	   double lm, double bm, int cnt)
 {
@@ -346,11 +381,11 @@ PlaceImage(FILE *fp, double pagewidth, double pageheight,
 	pagewidth *= PS_UNIT_SIZE;
 	pageheight *= PS_UNIT_SIZE;
 
-	if (maxPageHeight==0)
+	if (ctx->maxPageHeight==0)
 		splitheight = 0;
 	else
-		splitheight = maxPageHeight * PS_UNIT_SIZE;
-	overlap = splitOverlap * PS_UNIT_SIZE;
+		splitheight = ctx->maxPageHeight * PS_UNIT_SIZE;
+	overlap = ctx->splitOverlap * PS_UNIT_SIZE;
 
 	/*
 	 * WIDTH:
@@ -393,18 +428,18 @@ PlaceImage(FILE *fp, double pagewidth, double pageheight,
 	bottom_offset += ytran / (cnt?2:1);
 	if (cnt)
 	    left_offset += xtran / 2;
-	fprintf(fp, "%f %f translate\n", left_offset, bottom_offset);
-	fprintf(fp, "%f %f scale\n", xscale, yscale);
-	if (rotate)
-	    fputs ("1 1 translate 180 rotate\n", fp);
+	fprintf(ctx->fd, "%f %f translate\n", left_offset, bottom_offset);
+	fprintf(ctx->fd, "%f %f scale\n", xscale, yscale);
+	if (ctx->rotate)
+	    fputs ("1 1 translate 180 ctx->rotate\n", ctx->fd);
 
 	return splitpage;
 }
 
 
 void
-TIFF2PS(FILE* fd, TIFF* tif,
-	double pw, double ph, double lm, double bm, int cnt, int *npages)
+tiff2ps_process_page(TIFF2PSContext* ctx, TIFF* tif, double pw, double ph,
+		     double lm, double bm, gboolean cnt)
 {
 	uint32 w, h;
 	float ox, oy;
@@ -412,7 +447,6 @@ TIFF2PS(FILE* fd, TIFF* tif,
 	double scale = 1.0;
 	double left_offset = lm * PS_UNIT_SIZE;
 	double bottom_offset = bm * PS_UNIT_SIZE;
-	uint32 subfiletype;
 	uint16* sampleinfo;
 	int split;
 
@@ -420,127 +454,122 @@ TIFF2PS(FILE* fd, TIFF* tif,
 		ox = 0;
 	if (!TIFFGetField(tif, TIFFTAG_YPOSITION, &oy))
 		oy = 0;
-	setupPageState(tif, &w, &h, &prw, &prh);
-
-	do {
-		tf_numberstrips = TIFFNumberOfStrips(tif);
-		TIFFGetFieldDefaulted(tif, TIFFTAG_ROWSPERSTRIP,
-		    &tf_rowsperstrip);
-		setupPageState(tif, &w, &h, &prw, &prh);
-		if (!*npages)
-			PSHead(fd, tif, w, h, prw, prh, ox, oy);
-		TIFFGetFieldDefaulted(tif, TIFFTAG_BITSPERSAMPLE,
-		    &bitspersample);
-		TIFFGetFieldDefaulted(tif, TIFFTAG_SAMPLESPERPIXEL,
-		    &samplesperpixel);
-		TIFFGetFieldDefaulted(tif, TIFFTAG_PLANARCONFIG,
-		    &planarconfiguration);
-		TIFFGetField(tif, TIFFTAG_COMPRESSION, &compression);
-		TIFFGetFieldDefaulted(tif, TIFFTAG_EXTRASAMPLES,
-		    &extrasamples, &sampleinfo);
-		alpha = (extrasamples == 1 &&
-			 sampleinfo[0] == EXTRASAMPLE_ASSOCALPHA);
-		if (!TIFFGetField(tif, TIFFTAG_PHOTOMETRIC, &photometric)) {
-			switch (samplesperpixel - extrasamples) {
-			case 1:
-				if (isCCITTCompression(tif))
-					photometric = PHOTOMETRIC_MINISWHITE;
-				else
-					photometric = PHOTOMETRIC_MINISBLACK;
-				break;
-			case 3:
-				photometric = PHOTOMETRIC_RGB;
-				break;
-			case 4:
-				photometric = PHOTOMETRIC_SEPARATED;
-				break;
-			}
+	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(tif)) {
-			tf_bytesperrow = TIFFScanlineSize(tif);
-			*npages = *npages + 1;
-			fprintf(fd, "%%%%Page: %d %d\n", *npages, *npages);
-			if (!generateEPSF && ( level2 || level3 )) {
-				double psw = 0.0, psh = 0.0;
-				if (psw != 0.0) {
-					psw = pw * PS_UNIT_SIZE;
-					if (res_unit == RESUNIT_CENTIMETER)
-						psw *= 2.54F;
-				} else
-					psw=rotate ? prh:prw;
-				if (psh != 0.0) {
-					psh = ph * PS_UNIT_SIZE;
-					if (res_unit == RESUNIT_CENTIMETER)
-						psh *= 2.54F;
-				} else
-					psh=rotate ? prw:prh;
-				fprintf(fd,
-	"1 dict begin /PageSize [ %f %f ] def currentdict end setpagedevice\n",
-					psw, psh);
-				fputs(
-	"<<\n  /Policies <<\n    /PageSize 3\n  >>\n>> setpagedevice\n",
-				      fd);
-			}
-			fprintf(fd, "gsave\n");
-			fprintf(fd, "100 dict begin\n");
-			if (pw != 0 || ph != 0) {
-				if (!pw)
-					pw = prw;
-				if (!ph)
-					ph = prh;
-				if (maxPageHeight) { /* used -H option */
-					split = PlaceImage(fd,pw,ph,prw,prh,
-							   0,lm,bm,cnt);
-					while( split ) {
-					    PSpage(fd, tif, w, h);
-					    fprintf(fd, "end\n");
-					    fprintf(fd, "grestore\n");
-					    fprintf(fd, "showpage\n");
-					    *npages = *npages + 1;
-					    fprintf(fd, "%%%%Page: %d %d\n",
-						    *npages, *npages);
-					    fprintf(fd, "gsave\n");
-					    fprintf(fd, "100 dict begin\n");
-					    split = PlaceImage(fd,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(fd, "%f %f translate\n",
-						left_offset, bottom_offset);
-					fprintf(fd, "%f %f scale\n",
-						prw * scale, prh * scale);
-					if (rotate)
-						fputs ("1 1 translate 180 rotate\n", fd);
+	}
+	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 [ %f %f ] def currentdict end setpagedevice\n",
+				psw, 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 {
-				fprintf(fd, "%f %f scale\n", prw, prh);
-				if (rotate)
-					fputs ("1 1 translate 180 rotate\n", fd);
+				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, "%f %f translate\n",
+					left_offset, bottom_offset);
+				fprintf(ctx->fd, "%f %f scale\n",
+					prw * scale, prh * scale);
+				if (ctx->rotate)
+					fputs ("1 1 translate 180 ctx->rotate\n", ctx->fd);
 			}
-			PSpage(fd, tif, w, h);
-			fprintf(fd, "end\n");
-			fprintf(fd, "grestore\n");
-			fprintf(fd, "showpage\n");
+		} else {
+			fprintf(ctx->fd, "%f %f scale\n", prw, prh);
+			if (ctx->rotate)
+				fputs ("1 1 translate 180 ctx->rotate\n", ctx->fd);
 		}
-		if (generateEPSF)
-			break;
-		TIFFGetFieldDefaulted(tif, TIFFTAG_SUBFILETYPE, &subfiletype);
-	} while (((subfiletype & FILETYPE_PAGE) || printAll) &&
-	    TIFFReadDirectory(tif));
+		PSpage(ctx, tif, w, h);
+		fprintf(ctx->fd, "end\n");
+		fprintf(ctx->fd, "grestore\n");
+		fprintf(ctx->fd, "showpage\n");
+	}
 }
 
 
@@ -577,61 +606,66 @@ gsave newpath clippath pathbbox grestore\n\
 ";
 
 void
-PSHead(FILE *fd, TIFF *tif, uint32 w, uint32 h,
+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(fd, "%%!PS-Adobe-3.0%s\n", generateEPSF ? " EPSF-3.0" : "");
-	fprintf(fd, "%%%%Creator: Evince\n");
-	fprintf(fd, "%%%%CreationDate: %s", ctime(&t));
-	fprintf(fd, "%%%%DocumentData: Clean7Bit\n");
-	fprintf(fd, "%%%%Origin: %ld %ld\n", (long) ox, (long) oy);
+	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(fd, "%%%%BoundingBox: 0 0 %ld %ld\n",
-	    (long) ceil(pw), (long) ceil(ph));
-	fprintf(fd, "%%%%LanguageLevel: %d\n", (level3 ? 3 : (level2 ? 2 : 1)));
-	fprintf(fd, "%%%%Pages: (atend)\n");
-	fprintf(fd, "%%%%EndComments\n");
-	fprintf(fd, "%%%%BeginSetup\n");
-	if (PSduplex)
-		fprintf(fd, "%s", DuplexPreamble);
-	if (PStumble)
-		fprintf(fd, "%s", TumblePreamble);
-	if (PSavoiddeadzone && (level2 || level3))
-		fprintf(fd, "%s", AvoidDeadZonePreamble);
-	fprintf(fd, "%%%%EndSetup\n");
+	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");
 }
 
-void
-TIFFPSTail(FILE *fd, int npages)
+static void
+PSTail(TIFF2PSContext *ctx)
 {
-	fprintf(fd, "%%%%Trailer\n");
-	fprintf(fd, "%%%%Pages: %d\n", npages);
-	fprintf(fd, "%%%%EOF\n");
+	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(TIFF* tif, int n, uint16* r, uint16* g, uint16* b)
+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(filename, "Assuming 8-bit colormap");
+	TIFFWarning(ctx->filename, "Assuming 8-bit colormap");
 	return (8);
 }
 
 static void
-PS_Lvl2colorspace(FILE* fd, TIFF* tif)
+PS_Lvl2colorspace(TIFF2PSContext* ctx, TIFF* tif)
 {
 	uint16 *rmap, *gmap, *bmap;
 	int i, num_colors;
 	const char * colorspace_p;
 
-	switch ( photometric )
+	switch ( ctx->photometric )
 	{
 	case PHOTOMETRIC_SEPARATED:
 		colorspace_p = "CMYK";
@@ -649,25 +683,25 @@ PS_Lvl2colorspace(FILE* fd, TIFF* tif)
 	 * Set up PostScript Level 2 colorspace according to
 	 * section 4.8 in the PostScript refenence manual.
 	 */
-	fputs("% PostScript Level 2 only.\n", fd);
-	if (photometric != PHOTOMETRIC_PALETTE) {
-		if (photometric == PHOTOMETRIC_YCBCR) {
+	fputs("% PostScript Level 2 only.\n", ctx->fd);
+	if (ctx->photometric != PHOTOMETRIC_PALETTE) {
+		if (ctx->photometric == PHOTOMETRIC_YCBCR) {
 		    /* MORE CODE HERE */
 		}
-		fprintf(fd, "/Device%s setcolorspace\n", colorspace_p );
+		fprintf(ctx->fd, "/Device%s setcolorspace\n", colorspace_p );
 		return;
 	}
 
 	/*
 	 * Set up an indexed/palette colorspace
 	 */
-	num_colors = (1 << bitspersample);
+	num_colors = (1 << ctx->bitspersample);
 	if (!TIFFGetField(tif, TIFFTAG_COLORMAP, &rmap, &gmap, &bmap)) {
-		TIFFError(filename,
+		TIFFError(ctx->filename,
 			"Palette image w/o \"Colormap\" tag");
 		return;
 	}
-	if (checkcmap(tif, num_colors, rmap, gmap, bmap) == 16) {
+	if (checkcmap(ctx, tif, num_colors, rmap, gmap, bmap) == 16) {
 		/*
 		 * Convert colormap to 8-bits values.
 		 */
@@ -679,33 +713,33 @@ PS_Lvl2colorspace(FILE* fd, TIFF* tif)
 		}
 #undef CVT
 	}
-	fprintf(fd, "[ /Indexed /DeviceRGB %d", num_colors - 1);
-	if (ascii85) {
-		Ascii85Init();
-		fputs("\n<~", fd);
-		ascii85breaklen -= 2;
+	fprintf(ctx->fd, "[ /Indexed /DeviceRGB %d", num_colors - 1);
+	if (ctx->ascii85) {
+		Ascii85Init(ctx);
+		fputs("\n<~", ctx->fd);
+		ctx->ascii85breaklen -= 2;
 	} else
-		fputs(" <", fd);
+		fputs(" <", ctx->fd);
 	for (i = 0; i < num_colors; i++) {
-		if (ascii85) {
-			Ascii85Put((unsigned char)rmap[i], fd);
-			Ascii85Put((unsigned char)gmap[i], fd);
-			Ascii85Put((unsigned char)bmap[i], fd);
+		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  ", fd);
-			fprintf(fd, "%02x%02x%02x",
+			fputs((i % 8) ? " " : "\n  ", ctx->fd);
+			fprintf(ctx->fd, "%02x%02x%02x",
 			    rmap[i], gmap[i], bmap[i]);
 		}
 	}
-	if (ascii85)
-		Ascii85Flush(fd);
+	if (ctx->ascii85)
+		Ascii85Flush(ctx);
 	else
-		fputs(">\n", fd);
-	fputs("] setcolorspace\n", fd);
+		fputs(">\n", ctx->fd);
+	fputs("] setcolorspace\n", ctx->fd);
 }
 
 static int
-PS_Lvl2ImageDict(FILE* fd, TIFF* tif, uint32 w, uint32 h)
+PS_Lvl2ImageDict(TIFF2PSContext* ctx, TIFF* tif, uint32 w, uint32 h)
 {
 	int use_rawdata;
 	uint32 tile_width, tile_height;
@@ -714,7 +748,7 @@ PS_Lvl2ImageDict(FILE* fd, TIFF* tif, uint32 w, uint32 h)
 	char im_h[64], im_x[64], im_y[64];
 	char * imageOp = "image";
 
-	if ( useImagemask && (bitspersample == 1) )
+	if ( ctx->useImagemask && (ctx->bitspersample == 1) )
 		imageOp = "imagemask";
 
 	(void)strcpy(im_x, "0");
@@ -732,24 +766,24 @@ PS_Lvl2ImageDict(FILE* fd, TIFF* tif, uint32 w, uint32 h)
 			 * 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", fd);
+			fputs("0 0 1 1 rectclip\n", ctx->fd);
 		}
 		if (tile_width < w) {
-			fputs("/im_x 0 def\n", fd);
+			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", fd);
+			fputs("/im_y 0 def\n", ctx->fd);
 			(void)sprintf(im_y, "%lu im_y sub", (unsigned long) h);
 		}
 	} else {
-		repeat_count = tf_numberstrips;
-		tile_height = tf_rowsperstrip;
+		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", fd);
-			fprintf(fd, "/im_h %lu def\n",
+			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);
@@ -759,20 +793,20 @@ PS_Lvl2ImageDict(FILE* fd, TIFF* tif, uint32 w, uint32 h)
 	/*
 	 * Output start of exec block
 	 */
-	fputs("{ % exec\n", fd);
+	fputs("{ % exec\n", ctx->fd);
 
 	if (repeat_count > 1)
-		fprintf(fd, "%d { %% repeat\n", repeat_count);
+		fprintf(ctx->fd, "%d { %% repeat\n", repeat_count);
 
 	/*
 	 * Output filter options and image dictionary.
 	 */
-	if (ascii85)
+	if (ctx->ascii85)
 		fputs(" /im_stream currentfile /ASCII85Decode filter def\n",
-		    fd);
-	fputs(" <<\n", fd);
-	fputs("  /ImageType 1\n", fd);
-	fprintf(fd, "  /Width %lu\n", (unsigned long) tile_width);
+		      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
@@ -783,26 +817,26 @@ PS_Lvl2ImageDict(FILE* fd, TIFF* tif, uint32 w, uint32 h)
 	 * contain number of scanlines in tile (or image height in case of
 	 * one-stripped image).
 	 */
-	if (TIFFIsTiled(tif) || tf_numberstrips == 1)
-		fprintf(fd, "  /Height %lu\n", (unsigned long) tile_height);
+	if (TIFFIsTiled(tif) || ctx->tf_numberstrips == 1)
+		fprintf(ctx->fd, "  /Height %lu\n", (unsigned long) tile_height);
 	else
-		fprintf(fd, "  /Height im_h\n");
+		fprintf(ctx->fd, "  /Height im_h\n");
 
-	if (planarconfiguration == PLANARCONFIG_SEPARATE && samplesperpixel > 1)
-		fputs("  /MultipleDataSources true\n", fd);
-	fprintf(fd, "  /ImageMatrix [ %lu 0 0 %ld %s %s ]\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(fd, "  /BitsPerComponent %d\n", bitspersample);
-	fprintf(fd, "  /Interpolate %s\n", interpolate ? "true" : "false");
+	fprintf(ctx->fd, "  /BitsPerComponent %d\n", ctx->bitspersample);
+	fprintf(ctx->fd, "  /Ctx->Interpolate %s\n", ctx->interpolate ? "true" : "false");
 
-	switch (samplesperpixel - extrasamples) {
+	switch (ctx->samplesperpixel - ctx->extrasamples) {
 	case 1:
-		switch (photometric) {
+		switch (ctx->photometric) {
 		case PHOTOMETRIC_MINISBLACK:
-			fputs("  /Decode [0 1]\n", fd);
+			fputs("  /Decode [0 1]\n", ctx->fd);
 			break;
 		case PHOTOMETRIC_MINISWHITE:
-			switch (compression) {
+			switch (ctx->compression) {
 			case COMPRESSION_CCITTRLE:
 			case COMPRESSION_CCITTRLEW:
 			case COMPRESSION_CCITTFAX3:
@@ -811,13 +845,13 @@ PS_Lvl2ImageDict(FILE* fd, TIFF* tif, uint32 w, uint32 h)
 				 * Manage inverting with /Blackis1 flag
 				 * since there migth be uncompressed parts
 				 */
-				fputs("  /Decode [0 1]\n", fd);
+				fputs("  /Decode [0 1]\n", ctx->fd);
 				break;
 			default:
 				/*
 				 * ERROR...
 				 */
-				fputs("  /Decode [1 0]\n", fd);
+				fputs("  /Decode [1 0]\n", ctx->fd);
 				break;
 			}
 			break;
@@ -826,21 +860,21 @@ PS_Lvl2ImageDict(FILE* fd, TIFF* tif, uint32 w, uint32 h)
 			    &minsamplevalue);
 			TIFFGetFieldDefaulted(tif, TIFFTAG_MAXSAMPLEVALUE,
 			    &maxsamplevalue);
-			fprintf(fd, "  /Decode [%u %u]\n",
+			fprintf(ctx->fd, "  /Decode [%u %u]\n",
 				    minsamplevalue, maxsamplevalue);
 			break;
 		default:
 			/*
 			 * ERROR ?
 			 */
-			fputs("  /Decode [0 1]\n", fd);
+			fputs("  /Decode [0 1]\n", ctx->fd);
 			break;
 		}
 		break;
 	case 3:
-		switch (photometric) {
+		switch (ctx->photometric) {
 		case PHOTOMETRIC_RGB:
-			fputs("  /Decode [0 1 0 1 0 1]\n", fd);
+			fputs("  /Decode [0 1 0 1 0 1]\n", ctx->fd);
 			break;
 		case PHOTOMETRIC_MINISWHITE:
 		case PHOTOMETRIC_MINISBLACK:
@@ -848,7 +882,7 @@ PS_Lvl2ImageDict(FILE* fd, TIFF* tif, uint32 w, uint32 h)
 			/*
 			 * ERROR??
 			 */
-			fputs("  /Decode [0 1 0 1 0 1]\n", fd);
+			fputs("  /Decode [0 1 0 1 0 1]\n", ctx->fd);
 			break;
 		}
 		break;
@@ -856,109 +890,109 @@ PS_Lvl2ImageDict(FILE* fd, TIFF* tif, uint32 w, uint32 h)
 		/*
 		 * ERROR??
 		 */
-		fputs("  /Decode [0 1 0 1 0 1 0 1]\n", fd);
+		fputs("  /Decode [0 1 0 1 0 1 0 1]\n", ctx->fd);
 		break;
 	}
-	fputs("  /DataSource", fd);
-	if (planarconfiguration == PLANARCONFIG_SEPARATE &&
-	    samplesperpixel > 1)
-		fputs(" [", fd);
-	if (ascii85)
-		fputs(" im_stream", fd);
+	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", fd);
+		fputs(" currentfile /ASCIIHexDecode filter", ctx->fd);
 
 	use_rawdata = TRUE;
-	switch (compression) {
+	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", fd);
-		if (compression == COMPRESSION_CCITTFAX3) {
+		fputs("\n\t<<\n", ctx->fd);
+		if (ctx->compression == COMPRESSION_CCITTFAX3) {
 			uint32 g3_options;
 
-			fputs("\t /EndOfLine true\n", fd);
-			fputs("\t /EndOfBlock false\n", fd);
+			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(fd, "\t /K %s\n", im_h);
+				fprintf(ctx->fd, "\t /K %s\n", im_h);
 			if (g3_options & GROUP3OPT_UNCOMPRESSED)
-				fputs("\t /Uncompressed true\n", fd);
+				fputs("\t /Uncompressed true\n", ctx->fd);
 			if (g3_options & GROUP3OPT_FILLBITS)
-				fputs("\t /EncodedByteAlign true\n", fd);
+				fputs("\t /EncodedByteAlign true\n", ctx->fd);
 		}
-		if (compression == COMPRESSION_CCITTFAX4) {
+		if (ctx->compression == COMPRESSION_CCITTFAX4) {
 			uint32 g4_options;
 
-			fputs("\t /K -1\n", fd);
+			fputs("\t /K -1\n", ctx->fd);
 			TIFFGetFieldDefaulted(tif, TIFFTAG_GROUP4OPTIONS,
 					       &g4_options);
 			if (g4_options & GROUP4OPT_UNCOMPRESSED)
-				fputs("\t /Uncompressed true\n", fd);
+				fputs("\t /Uncompressed true\n", ctx->fd);
 		}
 		if (!(tile_width == w && w == 1728U))
-			fprintf(fd, "\t /Columns %lu\n",
+			fprintf(ctx->fd, "\t /Columns %lu\n",
 			    (unsigned long) tile_width);
-		fprintf(fd, "\t /Rows %s\n", im_h);
-		if (compression == COMPRESSION_CCITTRLE ||
-		    compression == COMPRESSION_CCITTRLEW) {
-			fputs("\t /EncodedByteAlign true\n", fd);
-			fputs("\t /EndOfBlock false\n", fd);
+		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 (photometric == PHOTOMETRIC_MINISBLACK)
-			fputs("\t /BlackIs1 true\n", fd);
-		fprintf(fd, "\t>> /CCITTFaxDecode filter");
+		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", fd);
-			fprintf(fd, "\t /Predictor %u\n", predictor);
-			fprintf(fd, "\t /Columns %lu\n",
+			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(fd, "\t /Colors %u\n", samplesperpixel);
-			fprintf(fd, "\t /BitsPerComponent %u\n",
-			    bitspersample);
-			fputs("\t>>", fd);
+			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", fd);
+		fputs(" /LZWDecode filter", ctx->fd);
 		break;
 	case COMPRESSION_DEFLATE:	/* 5: ZIP */
 	case COMPRESSION_ADOBE_DEFLATE:
-		if ( level3 ) {
+		if ( ctx->level3 ) {
 			 TIFFGetFieldDefaulted(tif, TIFFTAG_PREDICTOR, &predictor);
 			 if (predictor > 1) {
-				fprintf(fd, "\t %% PostScript Level 3 only.");
-				fputs("\n\t<<\n", fd);
-				fprintf(fd, "\t /Predictor %u\n", predictor);
-				fprintf(fd, "\t /Columns %lu\n",
+				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(fd, "\t /Colors %u\n", samplesperpixel);
-					fprintf(fd, "\t /BitsPerComponent %u\n",
-					bitspersample);
-				fputs("\t>>", fd);
+				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", fd);
+			 fputs(" /FlateDecode filter", ctx->fd);
 		} else {
 			use_rawdata = FALSE ;
 		}
 		break;
 	case COMPRESSION_PACKBITS:	/* 32773: Macintosh RLE */
-		fputs(" /RunLengthDecode filter", fd);
+		fputs(" /RunLengthDecode filter", ctx->fd);
 		use_rawdata = TRUE;
 	    break;
 	case COMPRESSION_OJPEG:		/* 6: !6.0 JPEG */
-	case COMPRESSION_JPEG:		/* 7: %JPEG DCT compression */
+	case COMPRESSION_JPEG:		/* 7: %JPEG DCT ctx->compression */
 #ifdef notdef
 		/*
 		 * Code not tested yet
 		 */
-		fputs(" /DCTDecode filter", fd);
+		fputs(" /DCTDecode filter", ctx->fd);
 		use_rawdata = TRUE;
 #else
 		use_rawdata = FALSE;
@@ -981,54 +1015,54 @@ PS_Lvl2ImageDict(FILE* fd, TIFF* tif, uint32 w, uint32 h)
 		use_rawdata = FALSE;
 		break;
 	}
-	if (planarconfiguration == PLANARCONFIG_SEPARATE &&
-	    samplesperpixel > 1) {
+	if (ctx->planarconfiguration == PLANARCONFIG_SEPARATE &&
+	    ctx->samplesperpixel > 1) {
 		uint16 i;
 
 		/*
 		 * NOTE: This code does not work yet...
 		 */
-		for (i = 1; i < samplesperpixel; i++)
-			fputs(" dup", fd);
-		fputs(" ]", fd);
+		for (i = 1; i < ctx->samplesperpixel; i++)
+			fputs(" dup", ctx->fd);
+		fputs(" ]", ctx->fd);
 	}
 
-	fprintf( fd, "\n >> %s\n", imageOp );
-	if (ascii85)
-		fputs(" im_stream status { im_stream flushfile } if\n", 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(fd, " /im_x im_x %lu add def\n",
+			fprintf(ctx->fd, " /im_x im_x %lu add def\n",
 			    (unsigned long) tile_width);
 			if (tile_height < h) {
-				fprintf(fd, " im_x %lu ge {\n",
+				fprintf(ctx->fd, " im_x %lu ge {\n",
 				    (unsigned long) w);
-				fputs("  /im_x 0 def\n", fd);
-				fprintf(fd, " /im_y im_y %lu add def\n",
+				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", fd);
+				fputs(" } if\n", ctx->fd);
 			}
 		}
 		if (tile_height < h) {
 			if (tile_width >= w) {
-				fprintf(fd, " /im_y im_y %lu add def\n",
+				fprintf(ctx->fd, " /im_y im_y %lu add def\n",
 				    (unsigned long) tile_height);
 				if (!TIFFIsTiled(tif)) {
-					fprintf(fd, " /im_h %lu im_y sub",
+					fprintf(ctx->fd, " /im_h %lu im_y sub",
 					    (unsigned long) h);
-					fprintf(fd, " dup %lu gt { pop",
+					fprintf(ctx->fd, " dup %lu gt { pop",
 					    (unsigned long) tile_height);
-					fprintf(fd, " %lu } if def\n",
+					fprintf(ctx->fd, " %lu } if def\n",
 					    (unsigned long) tile_height);
 				}
 			}
 		}
-		fputs("} repeat\n", fd);
+		fputs("} repeat\n", ctx->fd);
 	}
 	/*
 	 * End of exec function
 	 */
-	fputs("}\n", fd);
+	fputs("}\n", ctx->fd);
 
 	return(use_rawdata);
 }
@@ -1036,7 +1070,7 @@ PS_Lvl2ImageDict(FILE* fd, TIFF* tif, uint32 w, uint32 h)
 #define MAXLINE		36
 
 static int
-PS_Lvl2page(FILE* fd, TIFF* tif, uint32 w, uint32 h)
+PS_Lvl2page(TIFF2PSContext* ctx, TIFF* tif, uint32 w, uint32 h)
 {
 	uint16 fillorder;
 	int use_rawdata, tiled_image, breaklen = MAXLINE;
@@ -1049,14 +1083,14 @@ PS_Lvl2page(FILE* fd, TIFF* tif, uint32 w, uint32 h)
 	uint8		*	ascii85_p = 0;	/* Holds ASCII85 encoded data */
 #endif
 
-	PS_Lvl2colorspace(fd, tif);
-	use_rawdata = PS_Lvl2ImageDict(fd, tif, w, h);
+	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", fd);
+	fputs("%%BeginData:\n", ctx->fd);
 #endif
-	fputs("exec\n", fd);
+	fputs("exec\n", ctx->fd);
 
 	tiled_image = TIFFIsTiled(tif);
 	if (tiled_image) {
@@ -1080,13 +1114,13 @@ PS_Lvl2page(FILE* fd, TIFF* tif, uint32 w, uint32 h)
 	}
 	buf_data = (unsigned char *)_TIFFmalloc(chunk_size);
 	if (!buf_data) {
-		TIFFError(filename, "Can't alloc %u bytes for %s.",
+		TIFFError(ctx->filename, "Can't alloc %u bytes for %s.",
 			chunk_size, tiled_image ? "tiles" : "strips");
 		return(FALSE);
 	}
 
 #if defined( EXP_ASCII85ENCODER )
-	if ( ascii85 ) {
+	if ( ctx->ascii85 ) {
 	    /*
 	     * Allocate a buffer to hold the ASCII85 encoded data.  Note
 	     * that it is allocated with sufficient room to hold the
@@ -1101,7 +1135,8 @@ PS_Lvl2page(FILE* fd, TIFF* tif, uint32 w, uint32 h)
 	    if ( !ascii85_p ) {
 		_TIFFfree( buf_data );
 
-		TIFFError( filename, "Cannot allocate ASCII85 encoding buffer." );
+		TIFFError( ctx->filename,
+			   "Cannot allocate ASCII85 encoding buffer." );
 		return ( FALSE );
 	    }
 	}
@@ -1109,8 +1144,8 @@ PS_Lvl2page(FILE* fd, TIFF* tif, uint32 w, uint32 h)
 
 	TIFFGetFieldDefaulted(tif, TIFFTAG_FILLORDER, &fillorder);
 	for (chunk_no = 0; chunk_no < num_chunks; chunk_no++) {
-		if (ascii85)
-			Ascii85Init();
+		if (ctx->ascii85)
+			Ascii85Init(ctx);
 		else
 			breaklen = MAXLINE;
 		if (use_rawdata) {
@@ -1133,22 +1168,22 @@ PS_Lvl2page(FILE* fd, TIFF* tif, uint32 w, uint32 h)
 						chunk_size);
 		}
 		if (byte_count < 0) {
-			TIFFError(filename, "Can't read %s %d.",
+			TIFFError(ctx->filename, "Can't read %s %d.",
 				tiled_image ? "tile" : "strip", chunk_no);
-			if (ascii85)
-				Ascii85Put('\0', fd);
+			if (ctx->ascii85)
+				Ascii85Put(ctx, '\0');
 		}
 		/*
-		 * For images with alpha, matte against a white background;
+		 * 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 (alpha) {
+		if (ctx->alpha) {
 			int adjust, i, j = 0;
-			int ncomps = samplesperpixel - extrasamples;
-			for (i = 0; i < byte_count; i+=samplesperpixel) {
+			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:
@@ -1168,39 +1203,40 @@ PS_Lvl2page(FILE* fd, TIFF* tif, uint32 w, uint32 h)
 			byte_count -= j;
 		}
 
-		if (ascii85) {
+		if (ctx->ascii85) {
 #if defined( EXP_ASCII85ENCODER )
-			ascii85_l = Ascii85EncodeBlock(ascii85_p, 1, buf_data, byte_count );
+			ascii85_l = Ascii85EncodeBlock(ctx, ascii85_p, 1,
+						       buf_data, byte_count);
 
 			if ( ascii85_l > 0 )
-				fwrite( ascii85_p, ascii85_l, 1, fd );
+				fwrite( ascii85_p, ascii85_l, 1, ctx->fd );
 #else
 			for (cp = buf_data; byte_count > 0; byte_count--)
-				Ascii85Put(*cp++, fd);
+				Ascii85Put(ctx, *cp++);
 #endif
 		}
 		else
 		{
 			for (cp = buf_data; byte_count > 0; byte_count--) {
-				putc(hex[((*cp)>>4)&0xf], fd);
-				putc(hex[(*cp)&0xf], fd);
+				putc(hex[((*cp)>>4)&0xf], ctx->fd);
+				putc(hex[(*cp)&0xf], ctx->fd);
 				cp++;
 
 				if (--breaklen <= 0) {
-					putc('\n', fd);
+					putc('\n', ctx->fd);
 					breaklen = MAXLINE;
 				}
 			}
 		}
 
-		if ( !ascii85 ) {
-			if ( level2 || level3 )
-				putc( '>', fd );
-			putc('\n', fd);
+		if ( !ctx->ascii85 ) {
+			if ( ctx->level2 || ctx->level3 )
+				putc( '>', ctx->fd );
+			putc('\n', ctx->fd);
 		}
 #if !defined( EXP_ASCII85ENCODER )
 		else
-			Ascii85Flush(fd);
+			Ascii85Flush(ctx);
 #endif
 	}
 
@@ -1210,104 +1246,106 @@ PS_Lvl2page(FILE* fd, TIFF* tif, uint32 w, uint32 h)
 #endif
 	_TIFFfree(buf_data);
 #ifdef ENABLE_BROKEN_BEGINENDDATA
-	fputs("%%EndData\n", fd);
+	fputs("%%EndData\n", ctx->fd);
 #endif
 	return(TRUE);
 }
 
 void
-PSpage(FILE* fd, TIFF* tif, uint32 w, uint32 h)
+PSpage(TIFF2PSContext* ctx, TIFF* tif, uint32 w, uint32 h)
 {
-	char	*	imageOp = "image";
+	char *imageOp = "image";
 
-	if ( useImagemask && (bitspersample == 1) )
+	if ( ctx->useImagemask && (ctx->bitspersample == 1) )
 		imageOp = "imagemask";
 
-	if ((level2 || level3) && PS_Lvl2page(fd, tif, w, h))
+	if ((ctx->level2 || ctx->level3) && PS_Lvl2page(ctx, tif, w, h))
 		return;
-	ps_bytesperrow = tf_bytesperrow - (extrasamples * bitspersample / 8)*w;
-	switch (photometric) {
+	ctx->ps_bytesperrow = ctx->tf_bytesperrow - (ctx->extrasamples * ctx->bitspersample / 8)*w;
+	switch (ctx->photometric) {
 	case PHOTOMETRIC_RGB:
-		if (planarconfiguration == PLANARCONFIG_CONTIG) {
-			fprintf(fd, "%s", RGBcolorimage);
-			PSColorContigPreamble(fd, w, h, 3);
-			PSDataColorContig(fd, tif, w, h, 3);
+		if (ctx->planarconfiguration == PLANARCONFIG_CONTIG) {
+			fprintf(ctx->fd, "%s", RGBcolorimage);
+			PSColorContigPreamble(ctx, w, h, 3);
+			PSDataColorContig(ctx, tif, w, h, 3);
 		} else {
-			PSColorSeparatePreamble(fd, w, h, 3);
-			PSDataColorSeparate(fd, tif, w, h, 3);
+			PSColorSeparatePreamble(ctx, w, h, 3);
+			PSDataColorSeparate(ctx, tif, w, h, 3);
 		}
 		break;
 	case PHOTOMETRIC_SEPARATED:
 		/* XXX should emit CMYKcolorimage */
-		if (planarconfiguration == PLANARCONFIG_CONTIG) {
-			PSColorContigPreamble(fd, w, h, 4);
-			PSDataColorContig(fd, tif, w, h, 4);
+		if (ctx->planarconfiguration == PLANARCONFIG_CONTIG) {
+			PSColorContigPreamble(ctx, w, h, 4);
+			PSDataColorContig(ctx, tif, w, h, 4);
 		} else {
-			PSColorSeparatePreamble(fd, w, h, 4);
-			PSDataColorSeparate(fd, tif, w, h, 4);
+			PSColorSeparatePreamble(ctx, w, h, 4);
+			PSDataColorSeparate(ctx, tif, w, h, 4);
 		}
 		break;
 	case PHOTOMETRIC_PALETTE:
-		fprintf(fd, "%s", RGBcolorimage);
-		PhotoshopBanner(fd, w, h, 1, 3, "false 3 colorimage");
-		fprintf(fd, "/scanLine %ld string def\n",
-		    (long) ps_bytesperrow * 3L);
-		fprintf(fd, "%lu %lu 8\n",
-		    (unsigned long) w, (unsigned long) h);
-		fprintf(fd, "[%lu 0 0 -%lu 0 %lu]\n",
-		    (unsigned long) w, (unsigned long) h, (unsigned long) h);
-		fprintf(fd, "{currentfile scanLine readhexstring pop} bind\n");
-		fprintf(fd, "false 3 colorimage\n");
-		PSDataPalette(fd, tif, w, h);
+		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(fd, w, h, 1, 1, imageOp);
-		fprintf(fd, "/scanLine %ld string def\n",
-		    (long) ps_bytesperrow);
-		fprintf(fd, "%lu %lu %d\n",
-		    (unsigned long) w, (unsigned long) h, bitspersample);
-		fprintf(fd, "[%lu 0 0 -%lu 0 %lu]\n",
+		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(fd,
+		fprintf(ctx->fd,
 		    "{currentfile scanLine readhexstring pop} bind\n");
-		fprintf(fd, "%s\n", imageOp);
-		PSDataBW(fd, tif, w, h);
+		fprintf(ctx->fd, "%s\n", imageOp);
+		PSDataBW(ctx, tif, w, h);
 		break;
 	}
-	putc('\n', fd);
+	putc('\n', ctx->fd);
 }
 
 void
-PSColorContigPreamble(FILE* fd, uint32 w, uint32 h, int nc)
+PSColorContigPreamble(TIFF2PSContext* ctx, uint32 w, uint32 h, int nc)
 {
-	ps_bytesperrow = nc * (tf_bytesperrow / samplesperpixel);
-	PhotoshopBanner(fd, w, h, 1, nc, "false %d colorimage");
-	fprintf(fd, "/line %ld string def\n", (long) ps_bytesperrow);
-	fprintf(fd, "%lu %lu %d\n",
-	    (unsigned long) w, (unsigned long) h, bitspersample);
-	fprintf(fd, "[%lu 0 0 -%lu 0 %lu]\n",
+	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(fd, "{currentfile line readhexstring pop} bind\n");
-	fprintf(fd, "false %d colorimage\n", nc);
+	fprintf(ctx->fd, "{currentfile line readhexstring pop} bind\n");
+	fprintf(ctx->fd, "false %d colorimage\n", nc);
 }
 
 void
-PSColorSeparatePreamble(FILE* fd, uint32 w, uint32 h, int nc)
+PSColorSeparatePreamble(TIFF2PSContext* ctx, uint32 w, uint32 h, int nc)
 {
 	int i;
 
-	PhotoshopBanner(fd, w, h, ps_bytesperrow, nc, "true %d colorimage");
+	PhotoshopBanner(ctx, w, h, ctx->ps_bytesperrow, nc, "true %d colorimage");
 	for (i = 0; i < nc; i++)
-		fprintf(fd, "/line%d %ld string def\n",
-		    i, (long) ps_bytesperrow);
-	fprintf(fd, "%lu %lu %d\n",
-	    (unsigned long) w, (unsigned long) h, bitspersample);
-	fprintf(fd, "[%lu 0 0 -%lu 0 %lu] \n",
+		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(fd, "{currentfile line%d readhexstring pop}bind\n", i);
-	fprintf(fd, "true %d colorimage\n", nc);
+		fprintf(ctx->fd, "{currentfile line%d readhexstring pop}bind\n", i);
+	fprintf(ctx->fd, "true %d colorimage\n", nc);
 }
 
 #define	DOBREAK(len, howmany, fd) \
@@ -1318,52 +1356,52 @@ PSColorSeparatePreamble(FILE* fd, uint32 w, uint32 h, int nc)
 #define	PUTHEX(c,fd)	putc(hex[((c)>>4)&0xf],fd); putc(hex[(c)&0xf],fd)
 
 void
-PSDataColorContig(FILE* fd, TIFF* tif, uint32 w, uint32 h, int nc)
+PSDataColorContig(TIFF2PSContext* ctx, TIFF* tif, uint32 w, uint32 h, int nc)
 {
 	uint32 row;
-	int breaklen = MAXLINE, cc, es = samplesperpixel - nc;
+	int breaklen = MAXLINE, cc, es = ctx->samplesperpixel - nc;
 	unsigned char *tf_buf;
 	unsigned char *cp, c;
 
 	(void) w;
-	tf_buf = (unsigned char *) _TIFFmalloc(tf_bytesperrow);
+	tf_buf = (unsigned char *) _TIFFmalloc(ctx->tf_bytesperrow);
 	if (tf_buf == NULL) {
-		TIFFError(filename, "No space for scanline buffer");
+		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 (alpha) {
+		if (ctx->alpha) {
 			int adjust;
 			cc = 0;
-			for (; cc < tf_bytesperrow; cc += samplesperpixel) {
-				DOBREAK(breaklen, nc, fd);
+			for (; cc < ctx->tf_bytesperrow; cc += ctx->samplesperpixel) {
+				DOBREAK(breaklen, nc, ctx->fd);
 				/*
-				 * For images with alpha, matte against
+				 * 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,fd);
-				case 3: c = *cp++ + adjust; PUTHEX(c,fd);
-				case 2: c = *cp++ + adjust; PUTHEX(c,fd);
-				case 1: c = *cp++ + adjust; PUTHEX(c,fd);
+				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 < tf_bytesperrow; cc += samplesperpixel) {
-				DOBREAK(breaklen, nc, fd);
+			for (; cc < ctx->tf_bytesperrow; cc += ctx->samplesperpixel) {
+				DOBREAK(breaklen, nc, ctx->fd);
 				switch (nc) {
-				case 4: c = *cp++; PUTHEX(c,fd);
-				case 3: c = *cp++; PUTHEX(c,fd);
-				case 2: c = *cp++; PUTHEX(c,fd);
-				case 1: c = *cp++; PUTHEX(c,fd);
+				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;
 			}
@@ -1373,7 +1411,7 @@ PSDataColorContig(FILE* fd, TIFF* tif, uint32 w, uint32 h, int nc)
 }
 
 void
-PSDataColorSeparate(FILE* fd, TIFF* tif, uint32 w, uint32 h, int nc)
+PSDataColorSeparate(TIFF2PSContext* ctx, TIFF* tif, uint32 w, uint32 h, int nc)
 {
 	uint32 row;
 	int breaklen = MAXLINE, cc;
@@ -1382,20 +1420,20 @@ PSDataColorSeparate(FILE* fd, TIFF* tif, uint32 w, uint32 h, int nc)
 	unsigned char *cp, c;
 
 	(void) w;
-	tf_buf = (unsigned char *) _TIFFmalloc(tf_bytesperrow);
+	tf_buf = (unsigned char *) _TIFFmalloc(ctx->tf_bytesperrow);
 	if (tf_buf == NULL) {
-		TIFFError(filename, "No space for scanline buffer");
+		TIFFError(ctx->filename, "No space for scanline buffer");
 		return;
 	}
-	maxs = (samplesperpixel > nc ? nc : samplesperpixel);
+	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 < tf_bytesperrow; cc++) {
-				DOBREAK(breaklen, 1, fd);
+			for (cp = tf_buf, cc = 0; cc < ctx->tf_bytesperrow; cc++) {
+				DOBREAK(breaklen, 1, ctx->fd);
 				c = *cp++;
-				PUTHEX(c,fd);
+				PUTHEX(c,ctx->fd);
 			}
 		}
 	}
@@ -1406,7 +1444,7 @@ PSDataColorSeparate(FILE* fd, TIFF* tif, uint32 w, uint32 h, int nc)
 	PUTHEX(rmap[c],fd); PUTHEX(gmap[c],fd); PUTHEX(bmap[c],fd)
 
 void
-PSDataPalette(FILE* fd, TIFF* tif, uint32 w, uint32 h)
+PSDataPalette(TIFF2PSContext* ctx, TIFF* tif, uint32 w, uint32 h)
 {
 	uint16 *rmap, *gmap, *bmap;
 	uint32 row;
@@ -1416,26 +1454,26 @@ PSDataPalette(FILE* fd, TIFF* tif, uint32 w, uint32 h)
 
 	(void) w;
 	if (!TIFFGetField(tif, TIFFTAG_COLORMAP, &rmap, &gmap, &bmap)) {
-		TIFFError(filename, "Palette image w/o \"Colormap\" tag");
+		TIFFError(ctx->filename, "Palette image w/o \"Colormap\" tag");
 		return;
 	}
-	switch (bitspersample) {
+	switch (ctx->bitspersample) {
 	case 8:	case 4: case 2: case 1:
 		break;
 	default:
-		TIFFError(filename, "Depth %d not supported", bitspersample);
+		TIFFError(ctx->filename, "Depth %d not supported", ctx->bitspersample);
 		return;
 	}
-	nc = 3 * (8 / bitspersample);
-	tf_buf = (unsigned char *) _TIFFmalloc(tf_bytesperrow);
+	nc = 3 * (8 / ctx->bitspersample);
+	tf_buf = (unsigned char *) _TIFFmalloc(ctx->tf_bytesperrow);
 	if (tf_buf == NULL) {
-		TIFFError(filename, "No space for scanline buffer");
+		TIFFError(ctx->filename, "No space for scanline buffer");
 		return;
 	}
-	if (checkcmap(tif, 1<<bitspersample, rmap, gmap, bmap) == 16) {
+	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<<bitspersample)-1; i >= 0; i--) {
+		for (i = (1<<ctx->bitspersample)-1; i >= 0; i--) {
 			rmap[i] = CVT(rmap[i]);
 			gmap[i] = CVT(gmap[i]);
 			bmap[i] = CVT(bmap[i]);
@@ -1445,31 +1483,31 @@ PSDataPalette(FILE* fd, TIFF* tif, uint32 w, uint32 h)
 	for (row = 0; row < h; row++) {
 		if (TIFFReadScanline(tif, tf_buf, row, 0) < 0)
 			break;
-		for (cp = tf_buf, cc = 0; cc < tf_bytesperrow; cc++) {
-			DOBREAK(breaklen, nc, fd);
-			switch (bitspersample) {
+		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, fd);
+				c = *cp++; PUTRGBHEX(c, ctx->fd);
 				break;
 			case 4:
-				c = *cp++; PUTRGBHEX(c&0xf, fd);
-				c >>= 4;   PUTRGBHEX(c, fd);
+				c = *cp++; PUTRGBHEX(c&0xf, ctx->fd);
+				c >>= 4;   PUTRGBHEX(c, ctx->fd);
 				break;
 			case 2:
-				c = *cp++; PUTRGBHEX(c&0x3, fd);
-				c >>= 2;   PUTRGBHEX(c&0x3, fd);
-				c >>= 2;   PUTRGBHEX(c&0x3, fd);
-				c >>= 2;   PUTRGBHEX(c, fd);
+				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, fd);
-				c >>= 1;   PUTRGBHEX(c&0x1, fd);
-				c >>= 1;   PUTRGBHEX(c&0x1, fd);
-				c >>= 1;   PUTRGBHEX(c&0x1, fd);
-				c >>= 1;   PUTRGBHEX(c&0x1, fd);
-				c >>= 1;   PUTRGBHEX(c&0x1, fd);
-				c >>= 1;   PUTRGBHEX(c&0x1, fd);
-				c >>= 1;   PUTRGBHEX(c, fd);
+				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;
 			}
 		}
@@ -1478,7 +1516,7 @@ PSDataPalette(FILE* fd, TIFF* tif, uint32 w, uint32 h)
 }
 
 void
-PSDataBW(FILE* fd, TIFF* tif, uint32 w, uint32 h)
+PSDataBW(TIFF2PSContext* ctx, TIFF* tif, uint32 w, uint32 h)
 {
 	int breaklen = MAXLINE;
 	unsigned char* tf_buf;
@@ -1495,12 +1533,12 @@ PSDataBW(FILE* fd, TIFF* tif, uint32 w, uint32 h)
 	tf_buf = (unsigned char *) _TIFFmalloc(stripsize);
         memset(tf_buf, 0, stripsize);
 	if (tf_buf == NULL) {
-		TIFFError(filename, "No space for scanline buffer");
+		TIFFError(ctx->filename, "No space for scanline buffer");
 		return;
 	}
 
 #if defined( EXP_ASCII85ENCODER )
-	if ( ascii85 ) {
+	if ( ctx->ascii85 ) {
 	    /*
 	     * Allocate a buffer to hold the ASCII85 encoded data.  Note
 	     * that it is allocated with sufficient room to hold the
@@ -1515,30 +1553,31 @@ PSDataBW(FILE* fd, TIFF* tif, uint32 w, uint32 h)
 	    if ( !ascii85_p ) {
 		_TIFFfree( tf_buf );
 
-		TIFFError( filename, "Cannot allocate ASCII85 encoding buffer." );
+		TIFFError( ctx->filename,
+			   "Cannot allocate ASCII85 encoding buffer." );
 		return;
 	    }
 	}
 #endif
 
-	if (ascii85)
-		Ascii85Init();
+	if (ctx->ascii85)
+		Ascii85Init(ctx);
 
 	for (s = 0; s < TIFFNumberOfStrips(tif); s++) {
 		int cc = TIFFReadEncodedStrip(tif, s, tf_buf, stripsize);
 		if (cc < 0) {
-			TIFFError(filename, "Can't read strip");
+			TIFFError(ctx->filename, "Can't read strip");
 			break;
 		}
 		cp = tf_buf;
-		if (photometric == PHOTOMETRIC_MINISWHITE) {
+		if (ctx->photometric == PHOTOMETRIC_MINISWHITE) {
 			for (cp += cc; --cp >= tf_buf;)
 				*cp = ~*cp;
 			cp++;
 		}
-		if (ascii85) {
+		if (ctx->ascii85) {
 #if defined( EXP_ASCII85ENCODER )
-			if (alpha) {
+			if (ctx->alpha) {
 				int adjust, i;
 				for (i = 0; i < cc; i+=2) {
 					adjust = 255 - cp[i + 1];
@@ -1547,49 +1586,50 @@ PSDataBW(FILE* fd, TIFF* tif, uint32 w, uint32 h)
 				cc /= 2;
 			}
 
-			ascii85_l = Ascii85EncodeBlock( ascii85_p, 1, cp, cc );
+			ascii85_l = Ascii85EncodeBlock(ctx, ascii85_p, 1, cp,
+						       cc);
 
 			if ( ascii85_l > 0 )
-			    fwrite( ascii85_p, ascii85_l, 1, fd );
+			    fwrite( ascii85_p, ascii85_l, 1, ctx->fd );
 #else
 			while (cc-- > 0)
-				Ascii85Put(*cp++, fd);
+				Ascii85Put(ctx, *cp++);
 #endif /* EXP_ASCII85_ENCODER */
 		} else {
 			unsigned char c;
 
-			if (alpha) {
+			if (ctx->alpha) {
 				int adjust;
 				while (cc-- > 0) {
-					DOBREAK(breaklen, 1, fd);
+					DOBREAK(breaklen, 1, ctx->fd);
 					/*
-					 * For images with alpha, matte against
+					 * 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,fd);
+					c = *cp++ + adjust; PUTHEX(c,ctx->fd);
 					cp++, cc--;
 				}
 			} else {
 				while (cc-- > 0) {
 					c = *cp++;
-					DOBREAK(breaklen, 1, fd);
-					PUTHEX(c, fd);
+					DOBREAK(breaklen, 1, ctx->fd);
+					PUTHEX(c, ctx->fd);
 				}
 			}
 		}
 	}
 
-	if ( !ascii85 )
+	if ( !ctx->ascii85 )
 	{
-	    if ( level2 || level3)
-		fputs(">\n", fd);
+	    if ( ctx->level2 || ctx->level3)
+		fputs(">\n", ctx->fd);
 	}
 #if !defined( EXP_ASCII85ENCODER )
 	else
-	    Ascii85Flush(fd);
+	    Ascii85Flush(ctx);
 #else
 	if ( ascii85_p )
 	    _TIFFfree( ascii85_p );
@@ -1599,16 +1639,15 @@ PSDataBW(FILE* fd, TIFF* tif, uint32 w, uint32 h)
 }
 
 static void
-Ascii85Init(void)
+Ascii85Init(TIFF2PSContext *ctx)
 {
-	ascii85breaklen = 2*MAXLINE;
-	ascii85count = 0;
+	ctx->ascii85breaklen = 2*MAXLINE;
+	ctx->ascii85count = 0;
 }
 
-static char*
-Ascii85Encode(unsigned char* raw)
+static void
+Ascii85Encode(unsigned char* raw, char *buf)
 {
-	static char encoded[6];
 	uint32 word;
 
 	word = (((raw[0]<<8)+raw[1])<<16) + (raw[2]<<8) + raw[3];
@@ -1617,60 +1656,62 @@ Ascii85Encode(unsigned char* raw)
 		uint16 w1;
 
 		q = word / (85L*85*85*85);	/* actually only a byte */
-		encoded[0] = (char) (q + '!');
+		buf[0] = (char) (q + '!');
 
 		word -= q * (85L*85*85*85); q = word / (85L*85*85);
-		encoded[1] = (char) (q + '!');
+		buf[1] = (char) (q + '!');
 
 		word -= q * (85L*85*85); q = word / (85*85);
-		encoded[2] = (char) (q + '!');
+		buf[2] = (char) (q + '!');
 
 		w1 = (uint16) (word - q*(85L*85));
-		encoded[3] = (char) ((w1 / 85) + '!');
-		encoded[4] = (char) ((w1 % 85) + '!');
-		encoded[5] = '\0';
+		buf[3] = (char) ((w1 / 85) + '!');
+		buf[4] = (char) ((w1 % 85) + '!');
+		buf[5] = '\0';
 	} else
-		encoded[0] = 'z', encoded[1] = '\0';
-	return (encoded);
+		buf[0] = 'z', buf[1] = '\0';
 }
 
 void
-Ascii85Put(unsigned char code, FILE* fd)
+Ascii85Put(TIFF2PSContext *ctx, unsigned char code)
 {
-	ascii85buf[ascii85count++] = code;
-	if (ascii85count >= 4) {
+	ctx->ascii85buf[ctx->ascii85count++] = code;
+	if (ctx->ascii85count >= 4) {
 		unsigned char* p;
 		int n;
+		char buf[6];
 
-		for (n = ascii85count, p = ascii85buf; n >= 4; n -= 4, p += 4) {
+		for (n = ctx->ascii85count, p = ctx->ascii85buf;
+		     n >= 4; n -= 4, p += 4) {
 			char* cp;
-			for (cp = Ascii85Encode(p); *cp; cp++) {
-				putc(*cp, fd);
-				if (--ascii85breaklen == 0) {
-					putc('\n', fd);
-					ascii85breaklen = 2*MAXLINE;
+			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(ascii85buf, p, n);
-		ascii85count = n;
+		_TIFFmemcpy(ctx->ascii85buf, p, n);
+		ctx->ascii85count = n;
 	}
 }
 
 void
-Ascii85Flush(FILE* fd)
+Ascii85Flush(TIFF2PSContext* ctx)
 {
-	if (ascii85count > 0) {
-		char* res;
-		_TIFFmemset(&ascii85buf[ascii85count], 0, 3);
-		res = Ascii85Encode(ascii85buf);
-		fwrite(res[0] == 'z' ? "!!!!" : res, ascii85count + 1, 1, fd);
+	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", fd);
+	fputs("~>\n", ctx->fd);
 }
 #if	defined( EXP_ASCII85ENCODER)
 
-#define A85BREAKCNTR    ascii85breaklen
+#define A85BREAKCNTR    ctx->ascii85breaklen
 #define A85BREAKLEN     (2*MAXLINE)
 
 /*****************************************************************************
@@ -1681,7 +1722,8 @@ Ascii85Flush(FILE* fd)
 *               by raw_p and raw_l into ASCII85 format and store the encoding
 *               in the buffer given by ascii85_p.
 *
-* Parameters:   ascii85_p   -   A buffer supplied by the caller which will
+* 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.
@@ -1711,7 +1753,8 @@ Ascii85Flush(FILE* fd)
 *
 *****************************************************************************/
 
-int Ascii85EncodeBlock( uint8 * ascii85_p, unsigned f_eod, const uint8 * raw_p, int raw_l )
+int Ascii85EncodeBlock( TIFF2PSContext *ctx, uint8 * ascii85_p,
+			unsigned f_eod, const uint8 * raw_p, int raw_l )
 
 {
     char                        ascii85[5];     /* Encoded 5 tuple */
diff --git a/tiff/tiff2ps.h b/tiff/tiff2ps.h
index 0fde5a62..1944aacd 100644
--- a/tiff/tiff2ps.h
+++ b/tiff/tiff2ps.h
@@ -1,5 +1,30 @@
+/*
+ * Copyright (C) 2005 rpath, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <glib.h>
 #include <stdio.h>
 #include "tiffio.h"
 
-void	TIFF2PS(FILE*, TIFF*, double, double, double, double, int, int*);
-void	TIFFPSTail(FILE*, int);
+typedef struct _TIFF2PSContext TIFF2PSContext;
+
+TIFF2PSContext *tiff2ps_context_new(const gchar *filename);
+void tiff2ps_process_page(TIFF2PSContext* ctx, TIFF* tif,
+			  double pagewidth, double pageheight,
+			  double leftmargin, double bottommargin,
+			  gboolean center);
+void tiff2ps_context_finalize(TIFF2PSContext* ctx);