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%%	options

copyright owner	=	Dirk Krause
copyright year	=	2017-xxxx
SPDX-License-Identifier:	BSD-3-Clause


%%	module

#include "dk4conf.h"

#if	DK4_HAVE_MATH_H
#ifndef	MATH_H_INCLUDED
#if	DK4_ON_WINDOWS
#ifndef	_USE_MATH_DEFINES
#define	_USE_MATH_DEFINES 1
#endif
#endif
#include <math.h>
#define	MATH_H_INCLUDED 1
#endif
#endif

#ifndef	DK4MEM_H_INCLUDED
#include "dk4mem.h"
#endif

#ifndef	DK4GRA_H_INCLUDED
#include "dk4gra.h"
#endif

#ifndef	GRA_H_INCLUDED
#include "gra.h"
#endif

#ifndef	DK4BIF_H_INCLUDED
#include "dk4bif.h"
#endif

#ifndef	BIF_H_INCLUDED
#include "bif.h"
#endif

#ifndef	DK4BIFA_H_INCLUDED
#include "dk4bifa.h"
#endif

#ifndef	DK4UFI_H_INCLUDED
#include "dk4ufi.h"
#endif

#ifndef	DK4MAO8D_H_INCLUDED
#include "dk4mao8d.h"
#endif

#ifndef	DK4STRD_H_INCLUDED
#include "dk4strd.h"
#endif

#ifndef	DK4FOPD_H_INCLUDED
#include "dk4fopd.h"
#endif

#ifndef	DK4STRM_H_INCLUDED
#include "dk4strm.h"
#endif

#ifndef	DK4STRMCO_H_INCLUDED
#include "dk4strmco.h"
#endif

#ifndef	DK4BITSH_H_INCLUDED
#include "dk4bitsh.h"
#endif

#ifndef	DK4EDSTM_H_INCLUDED
#include "dk4edstm.h"
#endif

#if DK4_HAVE_ASSERT_H
#ifndef	ASSERT_H_INCLUDED
#include <assert.h>
#define	ASSERT_H_INCLUDED 1
#endif
#endif


$!trace-include



/**	Text fragments to write background color.
*/
static const char * const	dk4gra_pdfi_kw[] = {
$!string-table
#
#	0	Space
#
 
#
#	1-3	gray, rgb, cmyk
#
g
rg
k
#
#	4	Code for filled rectangle (0,0)--(0,1)--(1,1)--(1,0)--closepath
#
 0 0 m 0 1 l 1 1 l 1 0 l h f\n
$!end
};



/**	Write instruction to fill rectangle (0,0)--(0,1)--(1,1)--(1,0)--closepath.
	@param	os		Output stream (memory buffer stream).
	@param	colval	Color components array.
	@param	ncolval	Number of color components.
	@param	fii		Fill color instruction index.
	@param	backptr	Address of success variable to reset on error.
	@param	erp		Error report, may be NULL.
*/
static
void
dk4gra_pdf_fill_rectangle(
	dk4_stream_t	*os,
	double			*colval,
	size_t			 ncolval,
	size_t			 fii,
	int				*backptr,
	dk4_er_t		*erp
)
{
	size_t		i;

	for (i = 0; i < ncolval; i++) {
		dk4gratool_stream_double(os, colval[i], backptr, erp);
		dk4gratool_stream_string(os, dk4gra_pdfi_kw[0], backptr, erp);
	}
	dk4gratool_stream_string(os, dk4gra_pdfi_kw[fii], backptr, erp);
	dk4gratool_stream_string(os, dk4gra_pdfi_kw[4], backptr, erp);
}



/**	Setup text XObject for a given image.
	Note: No dynamic memory is used here, a pointer to the original
	fn is stored in the XObject.
	@param	xo		XObject to fill with data.
	@param	gra		Graphics output structure.
	@param	bif		Bitmap image file.
	@param	fn		Bitmap image file name.
	@param	fno		Frame number in bitmap image file.
	@param	ipol	Flag: Allow interpolation.
	@param	ajpg	Flag: Allow direct re-use of DCT encoded data from JPEG.
	@param	ijpg	Flag: Allow interpolation for DCT encoded data.
	@param	anb		Flag: Analyze bit depth.
	@param	anc		Flag: Analyze colors.
	@param	ana		Flag: Analyze alpha channel use.
	@param	erp		Error report, may be NULL.
*/

static
void
dk4gra_pdf_xo_setup(
	dk4_gra_pdf_img_xo_t	*xo,
	dk4_gra_t				*gra,
	dk4_bif_t				*bif,
	const dkChar			*fn,
	size_t					 fno,
	int						 ipol,
	int						 ajpg,
	int						 ijpg,
	int						 acol,
	int						 anb,
	int						 anc,
	int						 ana,
	dk4_er_t				*erp
)
{
	dk4_bif_jpeg_per_frame_t	*pjpgf;
	$? "+ dk4gra_pdf_xo_setup"
	dk4mem_reset(xo, sizeof(dk4_gra_pdf_img_xo_t), NULL);
	xo->fn = NULL;
	xo->i_mb = NULL;
	xo->m_mb = NULL;
	xo->fno = 0;
	xo->objno = 0;
	xo->mobjno = 0;
	xo->unxon = 0;
	xo->width = 0;
	xo->height = 0;
	xo->dct = 0;
	xo->ipol = 0;
	xo->cs = 0;		$? ". xo cs = 0"
	xo->hufi = 0;
	xo->deci = 0;
	xo->bpc = 0;
	xo->fn = fn;
	if (NULL == fn) {
		xo->unxon = gra->out.pdf.unxo;
		gra->out.pdf.unxo = gra->out.pdf.unxo + 1;
	}
	xo->fno = fno;
	xo->objno = gra->out.pdf.nextobj;
	xo->width = dk4bif_get_width(bif);
	xo->height = dk4bif_get_height(bif);
	if ((DK4_BIF_TYPE_JPEG == bif->imgtype) && (0 != ajpg)) {
		$? ". can use JPEG directly"
		xo->dct = 1;
		xo->ipol = (((0 != ipol) && (0 != ijpg)) ? (1) : (0));
		xo->cs = dk4bif_get_color_space(bif);
		xo->bpc = dk4bif_get_original_bit_depth(bif);
		pjpgf = (dk4_bif_jpeg_per_frame_t *)(bif->cf->tsdata);
		if (NULL != pjpgf) {
			if ((DK4_CS_CMYK == xo->cs) && (0 != pjpgf->is_adobe)) {
				xo->deci = 1;
			}
		}
		$? ". xo cs  = %d", xo->cs
		$? ". xo bpc = %u", (unsigned)(xo->bpc)
	}
	else {
		$? ". must decode JPEG"
		xo->ipol = ipol;
		if (0 == dk4bif_analyze(
				&(xo->cs), &(xo->bpc), bif, anb, anc, ana, erp
			)
		) {	$? "! image analysis failed"
			xo->cs = dk4bif_get_color_space(bif);
			xo->bpc = dk4bif_get_original_bit_depth(bif);
		}
		$? ". after analysis"
		$? ". xo cs  = %d", xo->cs
		$? ". xo bpc = %u", (unsigned)(xo->bpc)
		if (0 == acol) {
			switch (xo->cs) {
				case DK4_CS_RGB : case DK4_CS_CMYK : {
					xo->cs = DK4_CS_GRAY;			$? ". switching to gray"
				} break;
				case DK4_CS_RGB_ALPHA : {
					xo->cs = DK4_CS_GRAY_ALPHA;		$? ". switching to gray+a"
				} break;
			}
		}
		$? ". after correction for acol"
		$? ". xo cs  = %d", xo->cs
		$? ". xo bpc = %u", (unsigned)(xo->bpc)
	}
	if (8 < xo->bpc) {
		xo->bpc = 8;	$? ". bpc = %u", (unsigned)(xo->bpc)
	}
	if (NULL != fn) {
		xo->hufi = dk4ufi_get(&(xo->ufi), fn, erp);
#if	TRACE_DEBUG
		if (0 != xo->hufi) {
			$? ". dev = %llu", (unsigned long long)(xo->ufi.dev)
			$? ". ino = %llu", (unsigned long long)(xo->ufi.ino)
		}
#endif
	}
	$? ". xo file name = \"%!ds\"", TR_STR(xo->fn)
	$? ". xo frame no  = %lu", (unsigned long)(xo->fno)
	$? ". xo object no = %lu", (unsigned long)(xo->objno)
	$? ". xo mask no   = %lu", (unsigned long)(xo->mobjno)
	$? ". xo width     = %lu", (unsigned long)(xo->width)
	$? ". xo height    = %lu", (unsigned long)(xo->height)
	$? ". xo dct       = %d", xo->dct
	$? ". xo ipol      = %d", xo->ipol
	$? ". xo cs        = %d", xo->cs
	$? ". xo have ufi  = %d", xo->hufi
	$? ". xo bpc       = %u", (unsigned)(xo->bpc)
	$? "- dk4gra_pdf_xo_setup"
}



/**	Add image data to i_mb component of xo, directly transfer DCT
	encoded data from JPEG file.
	@param	xo		XObject to fill with data.
	@param	gra		Graphics output structure.
	@param	curpg	Current page.
	@param	bif		Bitmap image file.
	@param	fn		Bitmap image file name.
	@param	fno		Frame number in bitmap image file.
	@param	ipol	Flag: Allow interpolation.
	@param	ajpg	Flag: Allow direct re-use of DCT encoded data from JPEG.
	@param	ijpg	Flag: Allow interpolation for DCT encoded data.
	@param	anb		Flag: Analyze bit depth.
	@param	anc		Flag: Analyze colors.
	@param	ana		Flag: Analyze alpha channel use.
	@param	erp		Error report, may be NULL.
	@return	1 on success, 0 on error.
*/
static
int
dk4gra_pdf_add_jpeg_data(
	dk4_gra_pdf_img_xo_t	*xo,
	dk4_er_t				*erp
)
{
	char	 mybuf[128];
	FILE	*fipo	=	NULL;
	char	*bptr	=	mybuf;
	char	*aptr	=	NULL;
	size_t	 szbptr	=	sizeof(mybuf);
	size_t	 rdb;
	int		 fotest	=	DK4_FOPEN_SC_IS_REGULAR;
	int		 back	=	0;
	int		 cc		=	0;
	$? "+ dk4gra_pdf_add_jpeg_data"
	/*	Attempt to allocate a larger buffer dynamically
	*/
	aptr = (char *)calloc(4096,1);
	if (NULL != aptr) {
		bptr = aptr;
		szbptr = 4096;
	}
	fipo = dk4fopen(xo->fn, dkT("rb"), fotest, erp);
	if (NULL == fipo) {				$? "! failed to open file for reading"
		goto finished;
	}
	do {
		cc = 0;
		rdb = fread(bptr, 1, szbptr, fipo);	$? ". %u bytes read", (unsigned)rdb
		if (0 < rdb) {
			cc = 1;
			if (1 != dk4membuf_store(xo->i_mb, bptr, rdb, erp)) {
				$? "! failed to add bytes to memory buffer"
				cc = -1;
			}
		}
	} while (1 == cc);
	if (0 == cc) { back = 1; }

#if	TRACE_DEBUG
#if 0
	if (0 != dk4membuf_size(&rdb, curpg->membuf, NULL)) {
		$? ". bytes in memory buffer: %lu", (unsigned long)rdb
	}
	else {
		$? "! failed to obtain memory buffer size"
	}
#endif
#endif

	finished:
	if (NULL != aptr) { dk4mem_free(aptr); }
	if (NULL != fipo) { fclose(fipo); }
	$? "- dk4gra_pdf_add_jpeg_data %d", back
	return back;
}




/**	Add image data to i_mb component of xo, use dk4_bif_t methods to
	access pixel data.
	@param	xo		XObject to fill with data.
	@param	gra		Graphics output structure.
	@param	bptr	Current page.
	@param	bif		Bitmap image file.
	@param	fn		Bitmap image file name.
	@param	fno		Frame number in bitmap image file.
	@param	ipol	Flag: Allow interpolation.
	@param	ajpg	Flag: Allow direct re-use of DCT encoded data from JPEG.
	@param	ijpg	Flag: Allow interpolation for DCT encoded data.
	@param	anb		Flag: Analyze bit depth.
	@param	anc		Flag: Analyze colors.
	@param	ana		Flag: Analyze alpha channel use.
	@param	erp		Error report, may be NULL.
	@return	1 on success, 0 on error.
*/
static
int
dk4gra_pdf_add_bif_data(
	dk4_gra_pdf_img_xo_t	*xo,
	dk4_bif_t				*bif,
	dk4_er_t				*erp
)
{
	dk4_px_t			 pix[8];
	dk4_bit_shift_t		 bs;
	dk4_stream_t		*mbstrm	= NULL;
	dk4_stream_t		*costrm	= NULL;
	size_t				 nco	= 1;
	size_t				 y		= 0;
	size_t				 x		= 0;
	size_t				 i		= 0;
	int					 back	= 0;
	unsigned char		 uc		= 0;
	$? "+ dk4gra_pdf_add_bif_data"
	/*	Open streams to write compressed data to memory buffer
	*/
	mbstrm = dk4stream_open_membuf_writer(xo->i_mb, erp);
	if (NULL == mbstrm) {				$? "! mb stream"
		goto finished;
	}
	costrm = dk4strmco_open(
		mbstrm, DK4_STRMCO_PP_NONE, DK4_STRMCO_CO_FLATE,
		DK4_STRMCO_OE_NONE, 0, erp
	);
	if (NULL == costrm) {				$? "! co stream"
		goto finished;
	}
	/*
		Find color space size
	*/
	$? ". xo cs  = %d", xo->cs
	nco = dk4cs_color_space_size(xo->cs);
	$? ". nco    = %u", (unsigned)nco
	if ((DK4_CS_GRAY_ALPHA == xo->cs) || (DK4_CS_RGB_ALPHA == xo->cs)) {
		nco--;
	}
	$? ". nco    = %u", (unsigned)nco

	back = 1;

	dk4bif_set_output_bit_depth(bif, xo->bpc);
	if (8 == xo->bpc) {
		for (y = 0; y < (size_t)(xo->height); y++) {
			for (x = 0; x < (size_t)(xo->width); x++) {
				if (
					0 == dk4bif_get_pixel(
						pix, 8, bif,
						(dk4_bif_dim_t)y, (dk4_bif_dim_t)x, xo->cs
					)
				) {
					back = 0;		$? "! dk4bif_get_pixel"
				}
				for (i = 0; i < nco; i++) {
					if (0 == dk4stream_write_byte(costrm,(char)(pix[i]),erp)) {
						back = 0;	$? "! dk4stream_write_byte"
					}
				}
			}
		}
	}
	else {
		for (y = 0; y < (size_t)(xo->height); y++) {
			dk4bit_shift_init(&bs, erp);
			for (x = 0; x < (size_t)(xo->width); x++) {
				if (
					0 == dk4bif_get_pixel(
						pix, 8, bif,
						(dk4_bif_dim_t)y, (dk4_bif_dim_t)x, xo->cs
					)
				) {
					back = 0;	$? "! dk4bif_get_pixel"
				}
				for (i = 0; i < nco; i++) {
					dk4gratool_put_pixel_value(
						costrm, &bs, pix[i], xo->bpc, &back, erp
					);
				}
			}
			switch (dk4bit_shift_finish(&bs, erp)) {
				case DK4_EDSTM_FINISHED : {
					uc = dk4bit_shift_output(&bs, erp);
					if (0 == dk4stream_write_byte(costrm, (char)uc, erp)) {
						back = 0;	$? "! dk4stream_write_byte"
					}
				} break;
				case DK4_EDSTM_ERROR : {
					back = 0;
				} break;
			}
		}
	}


	/*	Cleanup
	*/
	finished:
	if (NULL != costrm) {
		if (0 == dk4stream_close(costrm, erp)) {	$? "! close co stream"
			back = 0;
		}
	}
	if (NULL != mbstrm) {
		if (0 == dk4stream_close(mbstrm, erp)) {	$? "! close mb stream"
			back = 0;
		}
	}
	$? "- dk4gra_pdf_add_bif_data %d", back
	return back;
}



/**	Add image data to xo.
	to obtain image data.
	@param	xo		XObject to fill with data.
	@param	gra		Graphics output structure.
	@param	bptr	Current page.
	@param	bif		Bitmap image file.
	@param	fn		Bitmap image file name.
	@param	fno		Frame number in bitmap image file.
	@param	ipol	Flag: Allow interpolation.
	@param	ajpg	Flag: Allow direct re-use of DCT encoded data from JPEG.
	@param	ijpg	Flag: Allow interpolation for DCT encoded data.
	@param	anb		Flag: Analyze bit depth.
	@param	anc		Flag: Analyze colors.
	@param	ana		Flag: Analyze alpha channel use.
	@param	erp		Error report, may be NULL.
	@return	1 on success, 0 on error.
*/
static
int
dk4gra_pdf_add_image_data(
	dk4_gra_pdf_img_xo_t	*xo,
	dk4_bif_t				*bif,
	int						 ajpg,
	dk4_er_t				*erp
)
{
	int		 back = 0;
	$? "+ dk4gra_pdf_add_image_data"
	if ((DK4_BIF_TYPE_JPEG == bif->imgtype) && (0 != ajpg)) {
		$? ". DCT data"
		back = dk4gra_pdf_add_jpeg_data(xo, erp);
	}
	else {
		$? ". normal data"
		back = dk4gra_pdf_add_bif_data(xo, bif, erp);
	}
	$? "- dk4gra_pdf_add_image_data %d", back
	return back;
}



/**	Add image mask data to m_mb component of xo.
	@param	xo		XObject to fill with data.
	@param	gra		Graphics output structure.
	@param	bptr	Current page.
	@param	bif		Bitmap image file.
	@param	fn		Bitmap image file name.
	@param	fno		Frame number in bitmap image file.
	@param	ipol	Flag: Allow interpolation.
	@param	ajpg	Flag: Allow direct re-use of DCT encoded data from JPEG.
	@param	ijpg	Flag: Allow interpolation for DCT encoded data.
	@param	anb		Flag: Analyze bit depth.
	@param	anc		Flag: Analyze colors.
	@param	erp		Error report, may be NULL.
	@return	1 on success, 0 on error.
*/
static
int
dk4gra_pdf_add_image_mask(
	dk4_gra_pdf_img_xo_t	*xo,
	dk4_bif_t				*bif,
	dk4_er_t				*erp
)
{
	dk4_px_t		 pix[8];
	dk4_bit_shift_t	 bs;
	dk4_stream_t	*mbstrm	= NULL;
	dk4_stream_t	*costrm	= NULL;
	size_t			 y;
	size_t			 x;
	size_t			 numco;
	int				 back	= 0;
	unsigned char	 uc;
	$? "+ dk4gra_pdf_add_image_mask"
	/*	Open streams to write compressed data to memory buffer
	*/
	mbstrm = dk4stream_open_membuf_writer(xo->m_mb, erp);
	if (NULL == mbstrm) {				$? "! failed to open mb stream"
		goto finished;
	}
	costrm = dk4strmco_open(
		mbstrm, DK4_STRMCO_PP_NONE, DK4_STRMCO_CO_FLATE,
		DK4_STRMCO_OE_NONE, 0, erp
	);
	if (NULL == costrm) {				$? "! failed to open co stream"
		goto finished;
	}

	/*	Success so far
	*/
	back = 1;

	numco = dk4cs_color_space_size(xo->cs);
	numco--;
	if (8 == xo->bpc) {
		for (y = 0; y < (size_t)(xo->height); y++) {
			for (x = 0; x < (size_t)(xo->width); x++) {
				if (
					0 == dk4bif_get_pixel(
						pix, 8, bif,
						(dk4_bif_dim_t)y, (dk4_bif_dim_t)x, xo->cs
					)
				) {
					back = 0;	$? "! dk4bif_get_pixel"
				}
				uc = (unsigned char)(pix[numco]);
				if (0 == dk4stream_write_byte(costrm, (char)uc, erp)) {
					back = 0;	$? "! dk4stream_write_byte"
				}
			}
		}
	}
	else {
		for (y = 0; y < (size_t)(xo->height); y++) {
			dk4bit_shift_init(&bs, erp);
			for (x = 0; x < (size_t)(xo->width); x++) {
				if (
					0 == dk4bif_get_pixel(
						pix, 8, bif,
						(dk4_bif_dim_t)y, (dk4_bif_dim_t)x, xo->cs
					)
				) {
					back = 0;	$? "! dk4bif_get_pixel"
				}
				dk4gratool_put_pixel_value(
					costrm, &bs, pix[numco], xo->bpc, &back, erp
				);
			}
			switch (dk4bit_shift_finish(&bs, erp)) {
				case DK4_EDSTM_FINISHED : {
					uc = dk4bit_shift_output(&bs, erp);
					if (0 == dk4stream_write_byte(costrm, (char)uc, erp)) {
						back = 0;	$? "! dk4stream_write_byte"
					}
				} break;
				case DK4_EDSTM_ERROR : {
					back = 0;
				} break;
			}
		}
	}

	/*	Clean up before returning
	*/
	finished:
	if (NULL != costrm) {
		if (0 == dk4stream_close(costrm, erp)) {	$? "! close co stream"
			back = 0;
		}
	}
	if (NULL != mbstrm) {
		if (0 == dk4stream_close(mbstrm, erp)) {	$? "! close mb stream"
			back = 0;
		}
	}
	$? "- dk4gra_pdf_add_image_mask %d", back
	return back;
}




/**	create a new object.
	@param	xo		Source XObject.
	@param	gra		Graphics output structure.
	@param	bptr	Current page.
	@param	bif		Bitmap image file.
	@param	fn		Bitmap image file name.
	@param	fno		Frame number in bitmap image file.
	@param	ipol	Flag: Allow interpolation.
	@param	ajpg	Flag: Allow direct re-use of DCT encoded data from JPEG.
	@param	ijpg	Flag: Allow interpolation for DCT encoded data.
	@param	anb		Flag: Analyze bit depth.
	@param	anc		Flag: Analyze colors.
	@param	ana		Flag: Analyze alpha channel use.
	@param	erp		Error report, may be NULL.
	@return	Valid pointer to new XObject, NULL on error.
*/

static
dk4_gra_pdf_img_xo_t *
dk4gra_pdf_xo_create(
	dk4_gra_pdf_img_xo_t	*xo,
	dk4_gra_t				*gra,
	dk4_bif_t				*bif,
	int						 ajpg,
	dk4_er_t				*erp
)
{
	dk4_gra_pdf_img_xo_t	*back	= NULL;
	int						 ok		= 0;
	$? "+ dk4gra_pdf_xo_create %lu", (unsigned long)(xo->objno)
	/*	Allocate memory
	*/
	back = dk4mem_new(dk4_gra_pdf_img_xo_t,1,erp);
	if (NULL == back) {					$? "! failed to allocate memory"
		goto finished;
	}

	/*	Copy existing information
	*/
	dk4mem_cpy(back, xo, sizeof(dk4_gra_pdf_img_xo_t), NULL);

	/*	Create own copy of file name
	*/
	if (NULL != xo->fn) {
		back->fn = dk4str_dup(xo->fn, erp);
		if (NULL == back->fn) {			$? "! failed to duplicate file name"
			goto finished;
		}
	}
	else {
		back->fn = NULL;
	}

	/*	Open memory buffers
	*/
	$? ". xo cs  = %d", xo->cs
	back->i_mb = dk4membuf_open(erp);
	if (NULL == back->i_mb) {			$? "! failed to open image mem buf"
		goto finished;
	}
	if ((DK4_CS_GRAY_ALPHA == xo->cs) || (DK4_CS_RGB_ALPHA == xo->cs)) {
		back->m_mb = dk4membuf_open(erp);
		if (NULL == back->m_mb) {		$? "! failed to open mask mem buf"
			goto finished;
		}
	}
	ok = dk4gra_pdf_add_image_data(
		back, bif, ajpg, erp
	);
	if (0 != ok) {						$? ". image data added"
		if ((DK4_CS_GRAY_ALPHA == xo->cs) || (DK4_CS_RGB_ALPHA == xo->cs)) {
			ok = dk4gra_pdf_add_image_mask(back,bif,erp);
#if TRACE_DEBUG
			if (0 == ok) {				$? "! failed to add mask data"
			}
#endif
		}
	}
	if (0 != ok) {
		if (0 == dk4sto_add(gra->out.pdf.s_images, back, erp)) {
			ok = 0;						$? "! failed to add to storage"
		}
		else {
			if (0 == dk4sto_add(gra->out.pdf.s_imagno, back, erp)) {
				ok = 0;					$? "! failed to add to storage"
			}
		}
	}
#if TRACE_DEBUG
	else {								$? "! failed to add image data"
	}
#endif

	
	finished:
	/*
		Clean up and return NULL on errors
	*/
	if ((NULL != back) && (0 == ok)) {
		/* Delete XObject */
		dk4gra_pdf_xo_delete(back);
		back = NULL;
	}
	/*
		If we have a new object, correct next object number in gra
	*/
	if (NULL != back) {
		gra->out.pdf.nextobj += 1;
		if (NULL != back->m_mb) {
			back->mobjno = gra->out.pdf.nextobj;
			gra->out.pdf.nextobj += 1;
		}
	}
	$? "- dk4gra_pdf_xo_create %d", TR_IPTR(back)
	return back;
}



/**	Find object or create a new one.
	@param	xo		XObject to fill with data.
	@param	gra		Graphics output structure.
	@param	bptr	Current page.
	@param	bif		Bitmap image file.
	@param	fn		Bitmap image file name.
	@param	fno		Frame number in bitmap image file.
	@param	ipol	Flag: Allow interpolation.
	@param	ajpg	Flag: Allow direct re-use of DCT encoded data from JPEG.
	@param	ijpg	Flag: Allow interpolation for DCT encoded data.
	@param	anb		Flag: Analyze bit depth.
	@param	anc		Flag: Analyze colors.
	@param	ana		Flag: Analyze alpha channel use.
	@param	erp		Error report, may be NULL.
	@return	Valid pointer to found or new XObject, NULL on error.
*/

static
dk4_gra_pdf_img_xo_t *
dk4gra_pdf_find_or_create(
	dk4_gra_pdf_img_xo_t	*xo,
	dk4_gra_t				*gra,
	dk4_bif_t				*bif,
	int						 ajpg,
	dk4_er_t				*erp
)
{
	dk4_gra_pdf_img_xo_t	*back	= NULL;
	$? "+ dk4gra_pdf_find_or_create"
	back = (dk4_gra_pdf_img_xo_t *)dk4sto_it_find_like(
		gra->out.pdf.i_images, xo, 0
	);
	if (NULL == back) {		$? ". must create new xo"
		back = dk4gra_pdf_xo_create(xo, gra, bif, ajpg, erp);
	}
#if	TRACE_DEBUG
	else {					$? ". found existing xo"
	}
#endif
	$? "- dk4gra_pdf_find_or_create %d", TR_IPTR(back)
	return back;
}



/**	Register XObject for use on page (add to the pages container
	of used XObjects if not yet present).
	@param	bptr	Current page.
	@param	xo		XObject to use on page.
	@param	erp		Error report, may be NULL.
	@return	1 on success, 0 on error.
*/
static
int
dk4gra_pdf_register_xo_for_page(
	dk4_gra_pdf_page_t		*bptr,
	dk4_gra_pdf_img_xo_t	*xo,
	dk4_er_t				*erp
)
{
	int					 back = 0;
	$? "+ dk4gra_pdf_register_xo_for_page %lu", (unsigned long)(xo->objno)
	if (NULL == bptr->s_uxo) {
		bptr->s_uxo = dk4sto_open(erp);
		if (NULL == bptr->s_uxo) {		$? "! failed to create storage"
			goto finished;
		}
		dk4sto_set_comp(bptr->s_uxo, dk4gra_pdf_compare_used_xo, 0);
	}
	if (NULL == bptr->i_uxo) {
		bptr->i_uxo = dk4sto_it_open(bptr->s_uxo, erp);
		if (NULL == bptr->i_uxo) {		$? "! failed to create iterator"
			goto finished;
		}
	}
	if (NULL != dk4sto_it_find_like(bptr->i_uxo, xo, 0)) {
		back = 1;						$? ". found existing object"
	}
	else {
		if (0 != dk4sto_add(bptr->s_uxo, xo, erp)) {
			back = 1;					$? ". added new object"
		}
#if TRACE_DEBUG
		else {							$? "! failed to add object"
		}
#endif
	}
	finished:
	$? "- dk4gra_pdf_register_xo_for_page %d", back
	return back;
}



int
dk4gra_pdf_bif_fig_image(
	dk4_gra_t			*gra,
	double				*cotra,
	dk4_bif_t			*bif,
	const dkChar		*fn,
	size_t				 fno,
	int					 ifl,
	dk4_er_t			*erp
)
{
	dk4_gra_pdf_img_xo_t	 testxo;
	dk4_gra_pdf_img_xo_t	*xo;
	dk4_gra_pdf_page_t		*bptr;
	double					 cm[6];
	dk4_px_t				 gbg[4];
	double					 cosphi;
	double					 sinphi;
	size_t					 i;
	int						 back	= 0;
	$? "+ dk4gra_pdf_bif_fig_image \"%!ds\"", TR_STR(fn)
#if	DK4_USE_ASSERT
	assert(NULL != gra);
	assert(NULL != cotra);
	assert(NULL != bif);
	assert(NULL != fn);
#endif
	$? ". fno = %u", (unsigned)fno
	$? ". ipol = %d", (DK4_GRA_IMG_FLAG_INTERPOLATION & ifl)
	$? ". ajpg = %d", (DK4_GRA_IMG_FLAG_DCT & ifl)
	$? ". ijpg = %d", (DK4_GRA_IMG_FLAG_DCT_INTERPOLATION & ifl)
	$? ". acol = %d", (DK4_GRA_IMG_FLAG_COLOR & ifl)
	$? ". anb = %d", (DK4_GRA_IMG_FLAG_ANALYZE_BPC & ifl)
	$? ". anc = %d", (DK4_GRA_IMG_FLAG_ANALYZE_COLOR & ifl)
	$? ". ana = %d", (DK4_GRA_IMG_FLAG_ANALYZE_ALPHA & ifl)
	$? ". fbgf = %d", (DK4_GRA_IMG_FLAG_FILL_BACKGROUND & ifl)
	bptr = (dk4_gra_pdf_page_t *)(gra->curpg);
	if (NULL == bptr->outstrm) {		$? "! not output stream for page"
		dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
		goto finished;
	}
	if (0 == (DK4_GRA_IMG_FLAG_COLOR & ifl)) {		$? ". no color"
		if (DK4_CS_GRAY != dk4bif_get_color_space(bif)) {	$? ". not gray"
			if (DK4_CS_GRAY_ALPHA != dk4bif_get_color_space(bif)) {
				ifl &= (~(DK4_GRA_IMG_FLAG_DCT));	$? ". ajpg = 0"
			}
		}
	}
	$? ". set up xo"
	dk4gra_pdf_xo_setup(
		&testxo, gra, bif, fn, fno,
		((0 != (DK4_GRA_IMG_FLAG_INTERPOLATION & ifl)) ? (1) : (0)),
		((0 != (DK4_GRA_IMG_FLAG_DCT & ifl)) ? (1) : (0)),
		((0 != (DK4_GRA_IMG_FLAG_DCT_INTERPOLATION & ifl)) ? (1) : (0)),
		((0 != (DK4_GRA_IMG_FLAG_COLOR & ifl)) ? (1) : (0)),
		((0 != (DK4_GRA_IMG_FLAG_ANALYZE_BPC & ifl)) ? (1) : (0)),
		((0 != (DK4_GRA_IMG_FLAG_ANALYZE_COLOR & ifl)) ? (1) : (0)),
		((0 != (DK4_GRA_IMG_FLAG_ANALYZE_ALPHA & ifl)) ? (1) : (0)),
		erp
	);
	xo = dk4gra_pdf_find_or_create(
		&testxo, gra, bif,
		((0 != (DK4_GRA_IMG_FLAG_DCT & ifl)) ? (1) : (0)),
		erp
	);
	if (NULL != xo) {		$? ". xo found"
		if (0 != dk4gra_pdf_register_xo_for_page(bptr, xo, erp)) {
			$? ". xo registered"
			back = 1;
			dk4gra_pdf_save_attributes(gra);
			dk4gra_i_gsave(gra, &back, erp);
#if	1
			/*
				One CTM for combined translate, rotate and scale
			*/
			for (i = 0; i < sizeof(cm)/sizeof(double); i++) { cm[i] = 0.0; }
			cosphi = cos((M_PI * cotra[2]) / 180.0);
			sinphi = sin((M_PI * cotra[2]) / 180.0);
			cm[0] = cotra[3] * cosphi;
			cm[1] = cotra[3] * sinphi;
			cm[2] = 0.0 - cotra[4] * sinphi;
			cm[3] = cotra[4] * cosphi;
			if (
				(DK4_GRA_EPSILON_COORDINATES < fabs(cotra[0]))
				|| (DK4_GRA_EPSILON_COORDINATES < fabs(cotra[1]))
			) {
				cm[4] = cotra[0];
				cm[5] = cotra[1];
			}
			dk4gra_pdf_i_values_and_kw(bptr->outstrm, cm, 6, 70, &back, erp);
#else
			/*
				Old code - no longer used - performing multiple CTM changes
				for a sequence of translate, rotate, and scale operations
			*/
			$? ". multiple CTMS for translate rotate scale"
			/* translate */
			if (
				(DK4_GRA_EPSILON_COORDINATES < fabs(cotra[0]))
				|| (DK4_GRA_EPSILON_COORDINATES < fabs(cotra[1]))
			) {
				for (i = 0; i < sizeof(cm)/sizeof(double); i++) { cm[i] = 0.0; }
				cm[0] = 1.0;
				cm[3] = 1.0;
				cm[4] = cotra[0];
				cm[5] = cotra[1];
				dk4gra_pdf_i_values_and_kw(bptr->outstrm,cm,6,70,&back,erp);
			}
			/* rotate */
			if (DK4_GRA_EPSILON_COORDINATES < fabs(cotra[2])) {
				for (i = 0; i < sizeof(cm)/sizeof(double); i++) { cm[i] = 0.0; }
				cm[0] = cosphi;
				cm[1] = sinphi;
				cm[2] = 0.0 - sinphi;
				cm[3] = cosphi;
				dk4gra_pdf_i_values_and_kw(bptr->outstrm,cm,6,70,&back, erp);
			}
			/* scale */
			for (i = 0; i < sizeof(cm)/sizeof(double); i++) { cm[i] = 0.0; }
			cm[0] = cotra[3];
			cm[3] = cotra[4];
			dk4gra_pdf_i_values_and_kw(bptr->outstrm, cm, 6, 70, &back, erp);
#endif
			/*
				Fill image background with background color if required
			*/
			if (0 != (DK4_GRA_IMG_FLAG_FILL_BACKGROUND & ifl)) {
				$? ". fill background first before applying image"
				switch (bif->cf->l_cs) {
					case DK4_CS_RGB_ALPHA : {
						if (0 != (DK4_GRA_IMG_FLAG_COLOR & ifl)) {
							$? ". fill rgb"
							for (i = 0; i < 3; i++) {
								cm[i]	= ((double)(bif->cf->bglbd[i]))
								/ ((double)dk4pxbit_get_max(bif->cf->l_bdepth));
								if (0.0 > cm[i]) { cm[i] = 0.0; }
								if (1.0 < cm[i]) { cm[i] = 1.0; }
							}
							dk4gra_pdf_fill_rectangle(
								bptr->outstrm, cm, 3, 2, &back, erp
							);
						}
						else {
							dk4cs_px_convert(
								gbg, DK4_CS_GRAY, DK4_SIZEOF(gbg,dk4_px_t),
								&(bif->cf->bglbd[0]), DK4_CS_RGB, 3,
								NULL, 0,
								dk4pxbit_get_max(bif->cf->l_bdepth),
								&(bif->cs_ctx), erp
							);
							for (i = 0; i < 1; i++) {
								cm[i]   = ((double)(gbg[i]))
								/ ((double)dk4pxbit_get_max(bif->cf->l_bdepth));
								if (0.0 > cm[i]) { cm[i] = 0.0; }
								if (1.0 < cm[i]) { cm[i] = 1.0; }
							}
							dk4gra_pdf_fill_rectangle(
								bptr->outstrm, cm, 1, 1, &back, erp
							);
						}
					} break;
					case DK4_CS_GRAY_ALPHA : {
						$? ". fill gray"
						for (i = 0; i < 1; i++) {
							cm[i]	= ((double)(bif->cf->bglbd[i]))
							/ ((double)dk4pxbit_get_max(bif->cf->l_bdepth));
							if (0.0 > cm[i]) { cm[i] = 0.0; }
							if (1.0 < cm[i]) { cm[i] = 1.0; }
						}
						dk4gra_pdf_fill_rectangle(
							bptr->outstrm, cm, 1, 1, &back, erp
						);
					} break;
				}
			}
			/*
				Write Do operator to stream
			*/
			/* /X */
			dk4gra_pdf_i_outstream_kw(bptr->outstrm, 71, &back, erp);
			/* number */
			dk4gratool_stream_uint(bptr->outstrm, xo->objno, 0, &back, erp);
			/* space and Do */
			dk4gra_pdf_i_outstream_kw(bptr->outstrm, 72, &back, erp);

			dk4gra_i_grestore(gra, 0, &back, erp);
			dk4gra_pdf_restore_attributes(gra);
		}
#if TRACE_DEBUG
		else {	$? "! failed to register xo"
		}
#endif
	}
#if TRACE_DEBUG
	else {		$? "! no xo found"
	}
#endif

	finished:
	$? "- dk4gra_pdf_bif_fig_image %d", back
	return back;
}


/* vim: set ai sw=4 ts=4 : */