/* Copyright (C) 1994, 1996, 1997, 1999 Aladdin Enterprises.  All rights reserved.
  
  This software is provided AS-IS with no warranty, either express or
  implied.
  
  This software is distributed under license and may not be copied,
  modified or distributed except as expressly authorized under the terms
  of the license contained in the file LICENSE in this distribution.
  
  For more information about licensing, please refer to
  http://www.ghostscript.com/licensing/. For information on
  commercial licensing, go to http://www.artifex.com/licensing/ or
  contact Artifex Software, Inc., 101 Lucas Valley Road #110,
  San Rafael, CA  94903, U.S.A., +1(415)492-9861.
*/

/* $Id: gsfont0.c,v 1.4 2002/02/21 22:24:52 giles Exp $ */
/* Composite font operations for Ghostscript library */
#include "memory_.h"
#include "gx.h"
#include "gserrors.h"
#include "gsstruct.h"
#include "gxfixed.h"
#include "gsmatrix.h"
#include "gxdevice.h"
#include "gxdevmem.h"
#include "gxfcache.h"		/* gs_font_dir */
#include "gxfont.h"
#include "gxfont0.h"

/* Structure descriptor */
private struct_proc_enum_ptrs(font_type0_enum_ptrs);
private struct_proc_reloc_ptrs(font_type0_reloc_ptrs);

public_st_gs_font_type0();
private 
ENUM_PTRS_WITH(font_type0_enum_ptrs, gs_font_type0 *pfont)
ENUM_PREFIX(st_gs_font, gs_type0_data_max_ptrs);
ENUM_PTR(0, gs_font_type0, data.Encoding);
ENUM_PTR(1, gs_font_type0, data.FDepVector);
case 2:
switch (pfont->data.FMapType)
{
    case fmap_SubsVector:
	ENUM_RETURN_CONST_STRING_PTR(gs_font_type0,
				     data.SubsVector);
    case fmap_CMap:
	ENUM_RETURN_PTR(gs_font_type0, data.CMap);
    default:
	ENUM_RETURN(0);
}
ENUM_PTRS_END
private RELOC_PTRS_WITH(font_type0_reloc_ptrs, gs_font_type0 *pfont)
RELOC_PREFIX(st_gs_font);
RELOC_PTR(gs_font_type0, data.Encoding);
RELOC_PTR(gs_font_type0, data.FDepVector);
switch (pfont->data.FMapType)
{
    case fmap_SubsVector:
RELOC_CONST_STRING_PTR(gs_font_type0, data.SubsVector);
break;
    case fmap_CMap:
RELOC_PTR(gs_font_type0, data.CMap);
break;
    default:
;
}
RELOC_PTRS_END

/* Adjust a composite font by concatenating a given matrix */
/* to the FontMatrix of all descendant composite fonts. */
private int
gs_type0_adjust_matrix(gs_font_dir * pdir, gs_font_type0 * pfont,
		       const gs_matrix * pmat)
{
    gs_font **pdep = pfont->data.FDepVector;
    uint fdep_size = pfont->data.fdep_size;
    gs_font **ptdep;
    uint i;

    /* Check for any descendant composite fonts. */
    for (i = 0; i < fdep_size; i++)
	if (pdep[i]->FontType == ft_composite)
	    break;
    if (i == fdep_size)
	return 0;
    ptdep = gs_alloc_struct_array(pfont->memory, fdep_size, gs_font *,
				  &st_gs_font_ptr_element,
				  "gs_type0_adjust_font(FDepVector)");
    if (ptdep == 0)
	return_error(gs_error_VMerror);
    memcpy(ptdep, pdep, sizeof(gs_font *) * fdep_size);
    for (; i < fdep_size; i++)
	if (pdep[i]->FontType == ft_composite) {
	    int code = gs_makefont(pdir, pdep[i], pmat, &ptdep[i]);

	    if (code < 0)
		return code;
	}
    pfont->data.FDepVector = ptdep;
    return 0;
}

/* Finish defining a composite font, */
/* by adjusting its descendants' FontMatrices. */
int
gs_type0_define_font(gs_font_dir * pdir, gs_font * pfont)
{
    const gs_matrix *pmat = &pfont->FontMatrix;

    /* Check for the identity matrix, which is common in root fonts. */
    if (pmat->xx == 1.0 && pmat->yy == 1.0 &&
	pmat->xy == 0.0 && pmat->yx == 0.0 &&
	pmat->tx == 0.0 && pmat->ty == 0.0
	)
	return 0;
    return gs_type0_adjust_matrix(pdir, (gs_font_type0 *) pfont, pmat);
}

/* Finish scaling a composite font similarly. */
int
gs_type0_make_font(gs_font_dir * pdir, const gs_font * pfont,
		   const gs_matrix * pmat, gs_font ** ppfont)
{
    return gs_type0_adjust_matrix(pdir, (gs_font_type0 *) * ppfont, pmat);
}