hpdf_fontdef_cid.c

/*
 * << Haru Free PDF Library >> -- hpdf_fontdef_cid.c
 *
 * URL: http://libharu.org
 *
 * Copyright (c) 1999-2006 Takeshi Kanno <takeshi_kanno@est.hi-ho.ne.jp>
 * Copyright (c) 2007-2009 Antony Dovgal <tony@daylessday.org>
 *
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.
 * It is provided "as is" without express or implied warranty.
 *
 */

#include "hpdf_conf.h"
#include "hpdf_utils.h"
#include "hpdf_fontdef.h"

void
HPDF_CIDFontDef_FreeWidth  (HPDF_FontDef  fontdef);


void
HPDF_CIDFontDef_FreeFunc (HPDF_FontDef  fontdef);


/*----------------------------------------------------------------------*/
/*----- HPDF_CIDFontDef ------------------------------------------------*/

void
HPDF_CIDFontDef_FreeWidth  (HPDF_FontDef  fontdef)
{
    HPDF_CIDFontDefAttr attr = (HPDF_CIDFontDefAttr)fontdef->attr;
    HPDF_UINT i;

    HPDF_PTRACE ((" HPDF_FontDef_Validate\n"));

    for (i = 0; i < attr->widths->count; i++) {
        HPDF_CID_Width *w =
                    (HPDF_CID_Width *)HPDF_List_ItemAt (attr->widths, i);

        HPDF_FreeMem (fontdef->mmgr, w);
    }

    HPDF_List_Free (attr->widths);
    attr->widths = NULL;

    fontdef->valid = HPDF_FALSE;
}


HPDF_FontDef
HPDF_CIDFontDef_New  (HPDF_MMgr               mmgr,
                      char              *name,
                      HPDF_FontDef_InitFunc   init_fn)
{
    HPDF_FontDef fontdef;
    HPDF_CIDFontDefAttr fontdef_attr;

    HPDF_PTRACE ((" HPDF_CIDFontDef_New\n"));

    if (!mmgr)
        return NULL;

    fontdef = HPDF_GetMem (mmgr, sizeof(HPDF_FontDef_Rec));
    if (!fontdef)
        return NULL;

    HPDF_MemSet (fontdef, 0, sizeof(HPDF_FontDef_Rec));
    fontdef->sig_bytes = HPDF_FONTDEF_SIG_BYTES;
    HPDF_StrCpy (fontdef->base_font, name, fontdef->base_font +
                    HPDF_LIMIT_MAX_NAME_LEN);
    fontdef->mmgr = mmgr;
    fontdef->error = mmgr->error;
    fontdef->type = HPDF_FONTDEF_TYPE_UNINITIALIZED;
    fontdef->free_fn = HPDF_CIDFontDef_FreeFunc;
    fontdef->init_fn = init_fn;
    fontdef->valid = HPDF_FALSE;
    fontdef_attr = HPDF_GetMem (mmgr, sizeof(HPDF_CIDFontDefAttr_Rec));
    if (!fontdef_attr) {
        HPDF_FreeMem (fontdef->mmgr, fontdef);
        return NULL;
    }

    fontdef->attr = fontdef_attr;
    HPDF_MemSet ((HPDF_BYTE *)fontdef_attr, 0,
                sizeof(HPDF_CIDFontDefAttr_Rec));

    fontdef_attr->widths = HPDF_List_New (mmgr, HPDF_DEF_CHAR_WIDTHS_NUM);
    if (!fontdef_attr->widths) {
        HPDF_FreeMem (fontdef->mmgr, fontdef);
        HPDF_FreeMem (fontdef->mmgr, fontdef_attr);
        return NULL;
    }

    fontdef->missing_width = 500;
    fontdef_attr->DW = 1000;
    fontdef_attr->DW2[0] = 880;
    fontdef_attr->DW2[1] = -1000;

    return fontdef;
}


HPDF_INT16
HPDF_CIDFontDef_GetCIDWidth  (HPDF_FontDef  fontdef,
                              HPDF_UINT16    cid)
{
    HPDF_CIDFontDefAttr attr = (HPDF_CIDFontDefAttr)fontdef->attr;
    HPDF_UINT i;

    HPDF_PTRACE ((" HPDF_CIDFontDef_GetCIDWidth\n"));

    for (i = 0; i < attr->widths->count; i++) {
        HPDF_CID_Width *w = (HPDF_CID_Width *)HPDF_List_ItemAt (attr->widths,
                i);

        if (w->cid == cid)
            return w->width;
    }

    /* Not found in pdf_cid_width array. */
    return attr->DW;
}

void
HPDF_CIDFontDef_FreeFunc (HPDF_FontDef  fontdef)
{
    HPDF_CIDFontDefAttr attr = (HPDF_CIDFontDefAttr)fontdef->attr;

    HPDF_PTRACE ((" HPDF_CIDFontDef_FreeFunc\n"));

    HPDF_CIDFontDef_FreeWidth (fontdef);
    HPDF_FreeMem (fontdef->mmgr, attr);
}


HPDF_STATUS
HPDF_CIDFontDef_AddWidth  (HPDF_FontDef            fontdef,
                           const HPDF_CID_Width   *widths)
{
    HPDF_CIDFontDefAttr attr = (HPDF_CIDFontDefAttr)fontdef->attr;

    HPDF_PTRACE ((" HPDF_CIDFontDef_AddWidth\n"));

    while (widths->cid != 0xFFFF) {
        HPDF_CID_Width *w = HPDF_GetMem (fontdef->mmgr,
                sizeof (HPDF_CID_Width));
        HPDF_STATUS ret;

        if (!w)
            return fontdef->error->error_no;

        w->cid = widths->cid;
        w->width = widths->width;

        if ((ret = HPDF_List_Add (attr->widths, w)) != HPDF_OK) {
            HPDF_FreeMem (fontdef->mmgr, w);

            return ret;
        }

        widths++;
    }

    return HPDF_OK;
}


HPDF_STATUS
HPDF_CIDFontDef_ChangeStyle  (HPDF_FontDef   fontdef,
                              HPDF_BOOL      bold,
                              HPDF_BOOL      italic)
{
    HPDF_PTRACE ((" HPDF_CIDFontDef_ChangeStyle\n"));

    if (!fontdef || !fontdef->attr)
        return HPDF_INVALID_FONTDEF_DATA;

    if (bold) {
        fontdef->stemv *= 2;
        fontdef->flags |= HPDF_FONT_FOURCE_BOLD;
    }

    if (italic) {
        fontdef->italic_angle -= 11;
        fontdef->flags |= HPDF_FONT_ITALIC;
    }

    return HPDF_OK;
}