コード例 #1
0
ファイル: pdf_font.c プロジェクト: MaChao5/pdfviewer-win32
static fz_error
loadcidfont(pdf_fontdesc **fontdescp, pdf_xref *xref, fz_obj *dict, fz_obj *encoding, fz_obj *tounicode)
{
	fz_error error;
	fz_obj *widths;
	fz_obj *descriptor;
	pdf_fontdesc *fontdesc;
	FT_Face face;
	fz_bbox bbox;
	int kind;
	char collection[256];
	char *basefont;
	int i, k, fterr;
	fz_obj *obj;
	int dw;

	/* Get font name and CID collection */

	basefont = fz_toname(fz_dictgets(dict, "BaseFont"));

	{
		fz_obj *cidinfo;
		char tmpstr[64];
		int tmplen;

		cidinfo = fz_dictgets(dict, "CIDSystemInfo");
		if (!cidinfo)
			return fz_throw("cid font is missing info");

		obj = fz_dictgets(cidinfo, "Registry");
		tmplen = MIN(sizeof tmpstr - 1, fz_tostrlen(obj));
		memcpy(tmpstr, fz_tostrbuf(obj), tmplen);
		tmpstr[tmplen] = '\0';
		fz_strlcpy(collection, tmpstr, sizeof collection);

		fz_strlcat(collection, "-", sizeof collection);

		obj = fz_dictgets(cidinfo, "Ordering");
		tmplen = MIN(sizeof tmpstr - 1, fz_tostrlen(obj));
		memcpy(tmpstr, fz_tostrbuf(obj), tmplen);
		tmpstr[tmplen] = '\0';
		fz_strlcat(collection, tmpstr, sizeof collection);
	}

	/* Load font file */

	fontdesc = pdf_newfontdesc();

	pdf_logfont("load cid font (%d %d R) ptr=%p {\n", fz_tonum(dict), fz_togen(dict), fontdesc);
	pdf_logfont("basefont %s\n", basefont);
	pdf_logfont("collection %s\n", collection);

	descriptor = fz_dictgets(dict, "FontDescriptor");
	if (descriptor)
		error = pdf_loadfontdescriptor(fontdesc, xref, descriptor, collection, basefont);
	else
		error = fz_throw("syntaxerror: missing font descriptor");
	if (error)
		goto cleanup;

	face = fontdesc->font->ftface;
	kind = ftkind(face);

	bbox.x0 = (face->bbox.xMin * 1000) / face->units_per_EM;
	bbox.y0 = (face->bbox.yMin * 1000) / face->units_per_EM;
	bbox.x1 = (face->bbox.xMax * 1000) / face->units_per_EM;
	bbox.y1 = (face->bbox.yMax * 1000) / face->units_per_EM;

	pdf_logfont("ft bbox [%d %d %d %d]\n", bbox.x0, bbox.y0, bbox.x1, bbox.y1);

	if (bbox.x0 == bbox.x1)
		fz_setfontbbox(fontdesc->font, -1000, -1000, 2000, 2000);
	else
		fz_setfontbbox(fontdesc->font, bbox.x0, bbox.y0, bbox.x1, bbox.y1);

	/* Encoding */

	error = fz_okay;
	if (fz_isname(encoding))
	{
		pdf_logfont("encoding /%s\n", fz_toname(encoding));
		if (!strcmp(fz_toname(encoding), "Identity-H"))
			fontdesc->encoding = pdf_newidentitycmap(0, 2);
		else if (!strcmp(fz_toname(encoding), "Identity-V"))
			fontdesc->encoding = pdf_newidentitycmap(1, 2);
		else
			error = pdf_loadsystemcmap(&fontdesc->encoding, fz_toname(encoding));
	}
	else if (fz_isindirect(encoding))
	{
		pdf_logfont("encoding %d %d R\n", fz_tonum(encoding), fz_togen(encoding));
		error = pdf_loadembeddedcmap(&fontdesc->encoding, xref, encoding);
	}
	else
	{
		error = fz_throw("syntaxerror: font missing encoding");
	}
	if (error)
		goto cleanup;

	pdf_setfontwmode(fontdesc, pdf_getwmode(fontdesc->encoding));
	pdf_logfont("wmode %d\n", pdf_getwmode(fontdesc->encoding));

	if (kind == TRUETYPE)
	{
		fz_obj *cidtogidmap;

		cidtogidmap = fz_dictgets(dict, "CIDToGIDMap");
		if (fz_isindirect(cidtogidmap))
		{
			fz_buffer *buf;

			pdf_logfont("cidtogidmap stream\n");

			error = pdf_loadstream(&buf, xref, fz_tonum(cidtogidmap), fz_togen(cidtogidmap));
			if (error)
				goto cleanup;

			fontdesc->ncidtogid = (buf->len) / 2;
			fontdesc->cidtogid = fz_malloc(fontdesc->ncidtogid * sizeof(unsigned short));
			for (i = 0; i < fontdesc->ncidtogid; i++)
				fontdesc->cidtogid[i] = (buf->data[i * 2] << 8) + buf->data[i * 2 + 1];

			fz_dropbuffer(buf);
		}

		/* if truetype font is external, cidtogidmap should not be identity */
		/* so we map from cid to unicode and then map that through the (3 1) */
		/* unicode cmap to get a glyph id */
		else if (fontdesc->font->ftsubstitute)
		{
			pdf_logfont("emulate ttf cidfont\n");

			fterr = FT_Select_Charmap(face, ft_encoding_unicode);
			if (fterr)
			{
				error = fz_throw("fonterror: no unicode cmap when emulating CID font: %s", ft_errorstring(fterr));
				goto cleanup;
			}

			if (!strcmp(collection, "Adobe-CNS1"))
				error = pdf_loadsystemcmap(&fontdesc->tottfcmap, "Adobe-CNS1-UCS2");
			else if (!strcmp(collection, "Adobe-GB1"))
				error = pdf_loadsystemcmap(&fontdesc->tottfcmap, "Adobe-GB1-UCS2");
			else if (!strcmp(collection, "Adobe-Japan1"))
				error = pdf_loadsystemcmap(&fontdesc->tottfcmap, "Adobe-Japan1-UCS2");
			else if (!strcmp(collection, "Adobe-Japan2"))
				error = pdf_loadsystemcmap(&fontdesc->tottfcmap, "Adobe-Japan2-UCS2");
			else if (!strcmp(collection, "Adobe-Korea1"))
				error = pdf_loadsystemcmap(&fontdesc->tottfcmap, "Adobe-Korea1-UCS2");
			else
				error = fz_okay;

			if (error)
			{
				error = fz_rethrow(error, "cannot load system cmap %s", collection);
				goto cleanup;
			}
		}
	}

	error = pdf_loadtounicode(fontdesc, xref, nil, collection, tounicode);
	if (error)
		goto cleanup;

	/* Horizontal */

	dw = 1000;
	obj = fz_dictgets(dict, "DW");
	if (obj)
		dw = fz_toint(obj);
	pdf_setdefaulthmtx(fontdesc, dw);

	widths = fz_dictgets(dict, "W");
	if (widths)
	{
		int c0, c1, w;

		for (i = 0; i < fz_arraylen(widths); )
		{
			c0 = fz_toint(fz_arrayget(widths, i));
			obj = fz_arrayget(widths, i + 1);
			if (fz_isarray(obj))
			{
				for (k = 0; k < fz_arraylen(obj); k++)
				{
					w = fz_toint(fz_arrayget(obj, k));
					pdf_addhmtx(fontdesc, c0 + k, c0 + k, w);
				}
				i += 2;
			}
			else
			{
				c1 = fz_toint(obj);
				w = fz_toint(fz_arrayget(widths, i + 2));
				pdf_addhmtx(fontdesc, c0, c1, w);
				i += 3;
			}
		}
	}

	pdf_endhmtx(fontdesc);

	/* Vertical */

	if (pdf_getwmode(fontdesc->encoding) == 1)
	{
		int dw2y = 880;
		int dw2w = -1000;

		obj = fz_dictgets(dict, "DW2");
		if (obj)
		{
			dw2y = fz_toint(fz_arrayget(obj, 0));
			dw2w = fz_toint(fz_arrayget(obj, 1));
		}

		pdf_setdefaultvmtx(fontdesc, dw2y, dw2w);

		widths = fz_dictgets(dict, "W2");
		if (widths)
		{
			int c0, c1, w, x, y;

			for (i = 0; i < fz_arraylen(widths); )
			{
				c0 = fz_toint(fz_arrayget(widths, i));
				obj = fz_arrayget(widths, i + 1);
				if (fz_isarray(obj))
				{
					for (k = 0; k < fz_arraylen(obj); k += 3)
					{
						w = fz_toint(fz_arrayget(obj, k + 0));
						x = fz_toint(fz_arrayget(obj, k + 1));
						y = fz_toint(fz_arrayget(obj, k + 2));
						pdf_addvmtx(fontdesc, c0 + k, c0 + k, x, y, w);
					}
					i += 2;
				}
				else
				{
					c1 = fz_toint(obj);
					w = fz_toint(fz_arrayget(widths, i + 2));
					x = fz_toint(fz_arrayget(widths, i + 3));
					y = fz_toint(fz_arrayget(widths, i + 4));
					pdf_addvmtx(fontdesc, c0, c1, x, y, w);
					i += 5;
				}
			}
		}

		pdf_endvmtx(fontdesc);
	}

	pdf_logfont("}\n");

	*fontdescp = fontdesc;
	return fz_okay;

cleanup:
	pdf_dropfont(fontdesc);
	return fz_rethrow(error, "cannot load cid font (%d %d R)", fz_tonum(dict), fz_togen(dict));
}
コード例 #2
0
static fz_error
loadsimplefont(pdf_fontdesc **fontdescp, pdf_xref *xref, fz_obj *dict)
{
	fz_error error;
	fz_obj *descriptor = nil;
	fz_obj *encoding = nil;
	fz_obj *widths = nil;
	unsigned short *etable = nil;
	pdf_fontdesc *fontdesc;
	fz_irect bbox;
	FT_Face face;
	FT_CharMap cmap;
	int kind;
	int symbolic;

	char *basefont;
	char *fontname;
	char *estrings[256];
	char ebuffer[256][32];
	int i, k, n;
	int fterr;

	basefont = fz_toname(fz_dictgets(dict, "BaseFont"));
	fontname = cleanfontname(basefont);

	/*
	 * Load font file
	 */

	fontdesc = pdf_newfontdesc();
	if (!fontdesc)
		return fz_rethrow(-1, "out of memory");

	pdf_logfont("load simple font (%d %d R) ptr=%p {\n", fz_tonum(dict), fz_togen(dict), fontdesc);
	pdf_logfont("basefont0 %s\n", basefont);
	pdf_logfont("basefont1 %s\n", fontname);

	descriptor = fz_dictgets(dict, "FontDescriptor");
	if (descriptor && basefont == fontname)
		error = pdf_loadfontdescriptor(fontdesc, xref, descriptor, nil);
	else
		error = pdf_loadbuiltinfont(fontdesc, fontname);
	if (error)
		goto cleanup;

	face = fontdesc->font->ftface;
	kind = ftkind(face);

	pdf_logfont("ft name '%s' '%s'\n", face->family_name, face->style_name);

	bbox.x0 = (face->bbox.xMin * 1000) / face->units_per_EM;
	bbox.y0 = (face->bbox.yMin * 1000) / face->units_per_EM;
	bbox.x1 = (face->bbox.xMax * 1000) / face->units_per_EM;
	bbox.y1 = (face->bbox.yMax * 1000) / face->units_per_EM;

	pdf_logfont("ft bbox [%d %d %d %d]\n", bbox.x0, bbox.y0, bbox.x1, bbox.y1);

	if (bbox.x0 == bbox.x1)
		fz_setfontbbox(fontdesc->font, -1000, -1000, 2000, 2000);
	else
		fz_setfontbbox(fontdesc->font, bbox.x0, bbox.y0, bbox.x1, bbox.y1);

	/*
	 * Encoding
	 */

	symbolic = fontdesc->flags & 4;

	if (face->num_charmaps > 0)
		cmap = face->charmaps[0];
	else
		cmap = nil;

	for (i = 0; i < face->num_charmaps; i++)
	{
		FT_CharMap test = face->charmaps[i];

		if (kind == TYPE1)
		{
			if (test->platform_id == 7)
				cmap = test;
		}

		if (kind == TRUETYPE)
		{
			if (test->platform_id == 1 && test->encoding_id == 0)
				cmap = test;
			if (test->platform_id == 3 && test->encoding_id == 1)
				cmap = test;
		}
	}

	if (cmap)
	{
		fterr = FT_Set_Charmap(face, cmap);
		if (fterr)
			fz_warn("freetype could not set cmap: %s", ft_errorstring(fterr));
	}
	else
		fz_warn("freetype could not find any cmaps");

	etable = fz_malloc(sizeof(unsigned short) * 256);
	if (!etable)
		goto cleanup;

	for (i = 0; i < 256; i++)
	{
		estrings[i] = nil;
		etable[i] = 0;
	}

	encoding = fz_dictgets(dict, "Encoding");
	if (encoding && !(kind == TRUETYPE && symbolic))
	{
		if (fz_isname(encoding))
			pdf_loadencoding(estrings, fz_toname(encoding));

		if (fz_isdict(encoding))
		{
			fz_obj *base, *diff, *item;

			base = fz_dictgets(encoding, "BaseEncoding");
			if (fz_isname(base))
				pdf_loadencoding(estrings, fz_toname(base));
			else if (!fontdesc->isembedded)
				pdf_loadencoding(estrings, "StandardEncoding");

			diff = fz_dictgets(encoding, "Differences");
			if (fz_isarray(diff))
			{
				n = fz_arraylen(diff);
				k = 0;
				for (i = 0; i < n; i++)
				{
					item = fz_arrayget(diff, i);
					if (fz_isint(item))
						k = fz_toint(item);
					if (fz_isname(item))
						estrings[k++] = fz_toname(item);
					if (k < 0) k = 0;
					if (k > 255) k = 255;
				}
			}
		}

		if (kind == TYPE1)
		{
			pdf_logfont("encode type1/cff by strings\n");
			for (i = 0; i < 256; i++)
				if (estrings[i])
					etable[i] = FT_Get_Name_Index(face, estrings[i]);
				else
					etable[i] = ftcharindex(face, i);
		}

		if (kind == TRUETYPE)
		{
			/* Unicode cmap */
			if (face->charmap && face->charmap->platform_id == 3)
			{
				pdf_logfont("encode truetype via unicode\n");
				for (i = 0; i < 256; i++)
					if (estrings[i])
					{
						int aglbuf[256];
						int aglnum;
						aglnum = pdf_lookupagl(estrings[i], aglbuf, nelem(aglbuf));
						if (aglnum != 1)
							etable[i] = FT_Get_Name_Index(face, estrings[i]);
						else
							etable[i] = ftcharindex(face, aglbuf[0]);
					}
					else
						etable[i] = ftcharindex(face, i);
			}

			/* MacRoman cmap */
			else if (face->charmap && face->charmap->platform_id == 1)
			{
				pdf_logfont("encode truetype via macroman\n");
				for (i = 0; i < 256; i++)
					if (estrings[i])
					{
						k = mrecode(estrings[i]);
						if (k <= 0)
							etable[i] = FT_Get_Name_Index(face, estrings[i]);
						else
							etable[i] = ftcharindex(face, k);
					}
					else
						etable[i] = ftcharindex(face, i);
			}

			/* Symbolic cmap */
			else
			{
				pdf_logfont("encode truetype symbolic\n");
				for (i = 0; i < 256; i++)
				{
					etable[i] = ftcharindex(face, i);
					fterr = FT_Get_Glyph_Name(face, etable[i], ebuffer[i], 32);
					if (fterr)
					{
						error = fz_throw("freetype get glyph name (gid %d): %s", etable[i], ft_errorstring(fterr));
						goto cleanup;
					}
					if (ebuffer[i][0])
						estrings[i] = ebuffer[i];
				}
			}
		}
	}

	else
	{
		pdf_logfont("encode builtin\n");
		for (i = 0; i < 256; i++)
		{
			etable[i] = ftcharindex(face, i);
			if (etable[i] == 0)
				continue;

			if (FT_HAS_GLYPH_NAMES(face))
			{
				fterr = FT_Get_Glyph_Name(face, etable[i], ebuffer[i], 32);
				if (fterr)
				{
					error = fz_throw("freetype get glyph name (gid %d): %s", etable[i], ft_errorstring(fterr));
					goto cleanup;
				}
				if (ebuffer[i][0])
					estrings[i] = ebuffer[i];
			}
		}
	}

	error = pdf_newidentitycmap(&fontdesc->encoding, 0, 1);
	if (error)
		goto cleanup;

	fontdesc->ncidtogid = 256;
	fontdesc->cidtogid = etable;

	error = pdf_loadtounicode(fontdesc, xref, estrings, nil, fz_dictgets(dict, "ToUnicode"));
	if (error)
		goto cleanup;

	/*
	 * Widths
	 */

	pdf_setdefaulthmtx(fontdesc, fontdesc->missingwidth);

	widths = fz_dictgets(dict, "Widths");
	if (widths)
	{
		int first, last;

		first = fz_toint(fz_dictgets(dict, "FirstChar"));
		last = fz_toint(fz_dictgets(dict, "LastChar"));

		if (first < 0 || last > 255 || first > last)
			first = last = 0;

		for (i = 0; i < last - first + 1; i++)
		{
			int wid = fz_toint(fz_arrayget(widths, i));
			error = pdf_addhmtx(fontdesc, i + first, i + first, wid);
			if (error)
				goto cleanup;
		}
	}
	else
	{
		fterr = FT_Set_Char_Size(face, 1000, 1000, 72, 72);
		if (fterr)
			fz_warn("freetype set character size: %s", ft_errorstring(fterr));
		for (i = 0; i < 256; i++)
		{
			error = pdf_addhmtx(fontdesc, i, i, ftwidth(fontdesc, i));
			if (error)
				goto cleanup;
		}
	}

	error = pdf_endhmtx(fontdesc);
	if (error)
		goto cleanup;

	pdf_logfont("}\n");

	*fontdescp = fontdesc;
	return fz_okay;

cleanup:
	fz_free(etable);
	fz_dropfont(fontdesc->font);
	fz_free(fontdesc);
	return fz_rethrow(error, "cannot load simple font");
}
コード例 #3
0
ファイル: pdf_font.c プロジェクト: MaChao5/pdfviewer-win32
static fz_error
loadsimplefont(pdf_fontdesc **fontdescp, pdf_xref *xref, fz_obj *dict)
{
	fz_error error;
	fz_obj *descriptor;
	fz_obj *encoding;
	fz_obj *widths;
	unsigned short *etable = nil;
	pdf_fontdesc *fontdesc;
	fz_bbox bbox;
	FT_Face face;
	FT_CharMap cmap;
	int kind;
	int symbolic;

	char *basefont;
	char *fontname;
	char *estrings[256];
	char ebuffer[256][32];
	int i, k, n;
	int fterr;

	basefont = fz_toname(fz_dictgets(dict, "BaseFont"));
	fontname = cleanfontname(basefont);

	/* Load font file */

	fontdesc = pdf_newfontdesc();

	pdf_logfont("load simple font (%d %d R) ptr=%p {\n", fz_tonum(dict), fz_togen(dict), fontdesc);
	pdf_logfont("basefont %s -> %s\n", basefont, fontname);

	descriptor = fz_dictgets(dict, "FontDescriptor");
	if (descriptor)
		error = pdf_loadfontdescriptor(fontdesc, xref, descriptor, nil, basefont);
	else
		error = pdf_loadbuiltinfont(fontdesc, fontname);
	if (error)
		goto cleanup;

	face = fontdesc->font->ftface;
	kind = ftkind(face);

	pdf_logfont("ft name '%s' '%s'\n", face->family_name, face->style_name);

	bbox.x0 = (face->bbox.xMin * 1000) / face->units_per_EM;
	bbox.y0 = (face->bbox.yMin * 1000) / face->units_per_EM;
	bbox.x1 = (face->bbox.xMax * 1000) / face->units_per_EM;
	bbox.y1 = (face->bbox.yMax * 1000) / face->units_per_EM;

	pdf_logfont("ft bbox [%d %d %d %d]\n", bbox.x0, bbox.y0, bbox.x1, bbox.y1);

	if (bbox.x0 == bbox.x1)
		fz_setfontbbox(fontdesc->font, -1000, -1000, 2000, 2000);
	else
		fz_setfontbbox(fontdesc->font, bbox.x0, bbox.y0, bbox.x1, bbox.y1);

	/* Encoding */

	symbolic = fontdesc->flags & 4;

	if (face->num_charmaps > 0)
		cmap = face->charmaps[0];
	else
		cmap = nil;

	for (i = 0; i < face->num_charmaps; i++)
	{
		FT_CharMap test = face->charmaps[i];

		if (kind == TYPE1)
		{
			if (test->platform_id == 7)
				cmap = test;
		}

		if (kind == TRUETYPE)
		{
			if (test->platform_id == 1 && test->encoding_id == 0)
				cmap = test;
			if (test->platform_id == 3 && test->encoding_id == 1)
				cmap = test;
		}
	}

	if (cmap)
	{
		fterr = FT_Set_Charmap(face, cmap);
		if (fterr)
			fz_warn("freetype could not set cmap: %s", ft_errorstring(fterr));
	}
	else
		fz_warn("freetype could not find any cmaps");

	etable = fz_malloc(sizeof(unsigned short) * 256);
	for (i = 0; i < 256; i++)
	{
		estrings[i] = nil;
		etable[i] = 0;
	}

	encoding = fz_dictgets(dict, "Encoding");
	if (encoding)
	{
		if (fz_isname(encoding))
			pdf_loadencoding(estrings, fz_toname(encoding));

		if (fz_isdict(encoding))
		{
			fz_obj *base, *diff, *item;

			base = fz_dictgets(encoding, "BaseEncoding");
			if (fz_isname(base))
				pdf_loadencoding(estrings, fz_toname(base));
			else if (!fontdesc->isembedded && !symbolic)
				pdf_loadencoding(estrings, "StandardEncoding");
			/* cf. http://bugs.ghostscript.com/show_bug.cgi?id=690615 and http://code.google.com/p/sumatrapdf/issues/detail?id=687 */
			/* try to extract an encoding from the font or synthesize a likely one */
			/* note: FT_Get_Name_Index fails for symbolic CFF fonts, so let them be encoded by index */
			else if (!fontdesc->encoding && !ftloadt1encoding(face, estrings) && !(symbolic && !strcmp(FT_Get_X11_Font_Format(face), "CFF")))
				pdf_loadencoding(estrings, "StandardEncoding");

			diff = fz_dictgets(encoding, "Differences");
			if (fz_isarray(diff))
			{
				n = fz_arraylen(diff);
				k = 0;
				for (i = 0; i < n; i++)
				{
					item = fz_arrayget(diff, i);
					if (fz_isint(item))
						k = fz_toint(item);
					if (fz_isname(item))
						estrings[k++] = fz_toname(item);
					if (k < 0) k = 0;
					if (k > 255) k = 255;
				}
			}
		}
	}

	/* start with the builtin encoding */
	for (i = 0; i < 256; i++)
		etable[i] = ftcharindex(face, i);

	/* encode by glyph name where we can */
	if (kind == TYPE1)
	{
		pdf_logfont("encode type1/cff by strings\n");
		for (i = 0; i < 256; i++)
		{
			if (estrings[i])
			{
				etable[i] = FT_Get_Name_Index(face, estrings[i]);
				if (etable[i] == 0)
				{
					int aglcode = pdf_lookupagl(estrings[i]);
					char **aglnames = pdf_lookupaglnames(aglcode);
					while (*aglnames)
					{
						etable[i] = FT_Get_Name_Index(face, *aglnames);
						if (etable[i])
							break;
						aglnames++;
					}
				}
			}
		}
	}

	/* encode by glyph name where we can */
	if (kind == TRUETYPE)
	{
		/* Unicode cmap */
		if (!symbolic && face->charmap && face->charmap->platform_id == 3)
		{
			pdf_logfont("encode truetype via unicode\n");
			for (i = 0; i < 256; i++)
			{
				if (estrings[i])
				{
					int aglcode = pdf_lookupagl(estrings[i]);
					if (!aglcode)
						etable[i] = FT_Get_Name_Index(face, estrings[i]);
					else
						etable[i] = ftcharindex(face, aglcode);
				}
			}
		}

		/* MacRoman cmap */
		else if (!symbolic && face->charmap && face->charmap->platform_id == 1)
		{
			pdf_logfont("encode truetype via macroman\n");
			for (i = 0; i < 256; i++)
			{
				if (estrings[i])
				{
					k = mrecode(estrings[i]);
					if (k <= 0)
						etable[i] = FT_Get_Name_Index(face, estrings[i]);
					else
						etable[i] = ftcharindex(face, k);
				}
			}
		}

		/* Symbolic cmap */
		else
		{
			pdf_logfont("encode truetype symbolic\n");
			for (i = 0; i < 256; i++)
			{
				if (estrings[i])
				{
					etable[i] = FT_Get_Name_Index(face, estrings[i]);
					if (etable[i] == 0)
						etable[i] = ftcharindex(face, i);
				}
			}
		}
	}

	/* try to reverse the glyph names from the builtin encoding */
	for (i = 0; i < 256; i++)
	{
		if (etable[i] && !estrings[i])
		{
			if (FT_HAS_GLYPH_NAMES(face))
			{
				fterr = FT_Get_Glyph_Name(face, etable[i], ebuffer[i], 32);
				if (fterr)
					fz_warn("freetype get glyph name (gid %d): %s", etable[i], ft_errorstring(fterr));
				if (ebuffer[i][0])
					estrings[i] = ebuffer[i];
			}
			else
			{
				estrings[i] = (char*) pdf_winansi[i]; /* discard const */
			}
		}
	}

	/* Prevent encoding Differences from being overwritten by reloading them */
	/* cf. http://code.google.com/p/sumatrapdf/issues/detail?id=115 */
	if (fz_isdict(encoding))
	{
		fz_obj *diff, *item;

		diff = fz_dictgets(encoding, "Differences");
		if (fz_isarray(diff))
		{
			n = fz_arraylen(diff);
			k = 0;
			for (i = 0; i < n; i++)
			{
				item = fz_arrayget(diff, i);
				if (fz_isint(item))
					k = fz_toint(item);
				if (fz_isname(item))
					estrings[k++] = fz_toname(item);
				if (k < 0) k = 0;
				if (k > 255) k = 255;
			}
		}
	}

	fontdesc->encoding = pdf_newidentitycmap(0, 1);
	fontdesc->ncidtogid = 256;
	fontdesc->cidtogid = etable;

	error = pdf_loadtounicode(fontdesc, xref, estrings, nil, fz_dictgets(dict, "ToUnicode"));
	if (error)
		goto cleanup;

	/* Widths */

	pdf_setdefaulthmtx(fontdesc, fontdesc->missingwidth);

	widths = fz_dictgets(dict, "Widths");
	if (widths)
	{
		int first, last;

		first = fz_toint(fz_dictgets(dict, "FirstChar"));
		last = fz_toint(fz_dictgets(dict, "LastChar"));

		if (first < 0 || last > 255 || first > last)
			first = last = 0;

		for (i = 0; i < last - first + 1; i++)
		{
			int wid = fz_toint(fz_arrayget(widths, i));
			pdf_addhmtx(fontdesc, i + first, i + first, wid);
		}
	}
	else
	{
		fterr = FT_Set_Char_Size(face, 1000, 1000, 72, 72);
		if (fterr)
			fz_warn("freetype set character size: %s", ft_errorstring(fterr));
		for (i = 0; i < 256; i++)
		{
			pdf_addhmtx(fontdesc, i, i, ftwidth(fontdesc, i));
		}
	}

	pdf_endhmtx(fontdesc);

	pdf_logfont("}\n");

	*fontdescp = fontdesc;
	return fz_okay;

cleanup:
	if (etable != fontdesc->cidtogid)
		fz_free(etable);
	pdf_dropfont(fontdesc);
	return fz_rethrow(error, "cannot load simple font (%d %d R)", fz_tonum(dict), fz_togen(dict));
}
コード例 #4
0
ファイル: pdf_type3.c プロジェクト: AllenChow/vudroid
fz_error
pdf_loadtype3font(pdf_fontdesc **fontdescp, pdf_xref *xref, fz_obj *rdb, fz_obj *dict)
{
	fz_error error;
	char buf[256];
	char *estrings[256];
	pdf_fontdesc *fontdesc;
	fz_obj *encoding;
	fz_obj *widths;
	fz_obj *resources;
	fz_obj *charprocs;
	fz_obj *obj;
	int first, last;
	int i, k, n;
	fz_rect bbox;
	fz_matrix matrix;

	obj = fz_dictgets(dict, "Name");
	if (fz_isname(obj))
		strlcpy(buf, fz_toname(obj), sizeof buf);
	else
		sprintf(buf, "Unnamed-T3");

	fontdesc = pdf_newfontdesc();

	pdf_logfont("load type3 font (%d %d R) ptr=%p {\n", fz_tonum(dict), fz_togen(dict), fontdesc);
	pdf_logfont("name %s\n", buf);

	obj = fz_dictgets(dict, "FontMatrix");
	matrix = pdf_tomatrix(obj);

	pdf_logfont("matrix [%g %g %g %g %g %g]\n",
		matrix.a, matrix.b,
		matrix.c, matrix.d,
		matrix.e, matrix.f);

	obj = fz_dictgets(dict, "FontBBox");
	bbox = pdf_torect(obj);

	pdf_logfont("bbox [%g %g %g %g]\n",
		bbox.x0, bbox.y0,
		bbox.x1, bbox.y1);

	bbox = fz_transformaabb(matrix, bbox);
	bbox.x0 = fz_floor(bbox.x0 * 1000);
	bbox.y0 = fz_floor(bbox.y0 * 1000);
	bbox.x1 = fz_ceil(bbox.x1 * 1000);
	bbox.y1 = fz_ceil(bbox.y1 * 1000);

	fontdesc->font = fz_newtype3font(buf, matrix);

	fz_setfontbbox(fontdesc->font, bbox.x0, bbox.y0, bbox.x1, bbox.y1);

	/*
	 * Encoding
	 */

	for (i = 0; i < 256; i++)
		estrings[i] = nil;

	encoding = fz_dictgets(dict, "Encoding");
	if (!encoding)
	{
		error = fz_throw("syntaxerror: Type3 font missing Encoding");
		goto cleanup;
	}

	if (fz_isname(encoding))
		pdf_loadencoding(estrings, fz_toname(encoding));

	if (fz_isdict(encoding))
	{
		fz_obj *base, *diff, *item;

		base = fz_dictgets(encoding, "BaseEncoding");
		if (fz_isname(base))
			pdf_loadencoding(estrings, fz_toname(base));

		diff = fz_dictgets(encoding, "Differences");
		if (fz_isarray(diff))
		{
			n = fz_arraylen(diff);
			k = 0;
			for (i = 0; i < n; i++)
			{
				item = fz_arrayget(diff, i);
				if (fz_isint(item))
					k = fz_toint(item);
				if (fz_isname(item))
					estrings[k++] = fz_toname(item);
				if (k < 0) k = 0;
				if (k > 255) k = 255;
			}
		}
	}

	fontdesc->encoding = pdf_newidentitycmap(0, 1);

	error = pdf_loadtounicode(fontdesc, xref, estrings, nil, fz_dictgets(dict, "ToUnicode"));
	if (error)
		goto cleanup;

	/*
	 * Widths
	 */

	pdf_setdefaulthmtx(fontdesc, 0);

	first = fz_toint(fz_dictgets(dict, "FirstChar"));
	last = fz_toint(fz_dictgets(dict, "LastChar"));

	widths = fz_dictgets(dict, "Widths");
	if (!widths)
	{
		error = fz_throw("syntaxerror: Type3 font missing Widths");
		goto cleanup;
	}

	for (i = first; i <= last; i++)
	{
		float w = fz_toreal(fz_arrayget(widths, i - first));
		w = fontdesc->font->t3matrix.a * w * 1000.0;
		fontdesc->font->t3widths[i] = w * 0.001;
		pdf_addhmtx(fontdesc, i, i, w);
	}

	pdf_endhmtx(fontdesc);

	/*
	 * Resources
	 */

	resources = fz_dictgets(dict, "Resources");

	/* Inherit page's resource dict if type3 font does not have one */
	if (!resources && rdb)
		resources = rdb;
	else if (!resources && !rdb)
		fz_warn("no resource dictionary for type 3 font!");

	/*
	 * CharProcs
	 */

	charprocs = fz_dictgets(dict, "CharProcs");
	if (!charprocs)
	{
		error = fz_throw("syntaxerror: Type3 font missing CharProcs");
		goto cleanup;
	}

	for (i = 0; i < 256; i++)
	{
		if (estrings[i])
		{
			obj = fz_dictgets(charprocs, estrings[i]);
			if (obj)
			{
				pdf_logfont("load charproc %s {\n", estrings[i]);
				error = loadcharproc(&fontdesc->font->t3procs[i], xref, resources, obj);
				if (error)
					goto cleanup;

				pdf_logfont("}\n");
			}
		}
	}

	pdf_logfont("}\n");

	*fontdescp = fontdesc;
	return fz_okay;

cleanup:
	fz_dropfont(fontdesc->font);
	fz_free(fontdesc);
	return fz_rethrow(error, "cannot load type3 font");
}