DenysMedvid/pdf2htmlEX
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support cid fonts

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This commit is contained in:
Lu Wang 2012-08-11 19:55:06 +08:00
parent fdc0877afb
commit 39846f33bb
3 changed files with 147 additions and 23 deletions
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1
README.md
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@ -49,6 +49,7 @@ GPLv3
We would like to acknowledge the following projects that have been consulted while writing this program:
* pdftops & pdftohtml from poppler
* MuPDF
* PDF.js
* Crocodoc
* Google Doc

162
src/HTMLRenderer.cc
View File

@ -407,7 +407,8 @@ long long HTMLRenderer::install_font(GfxFont * font)
{
case gfxFontLocEmbedded:
{
std::string suffix;
std::string suffix = dump_embedded_font(font, new_fn_id);
/*
switch(font_loc -> fontType)
{
case fontType1:
@ -440,6 +441,7 @@ long long HTMLRenderer::install_font(GfxFont * font)
std::cerr << "TODO: unsuppported embedded font type" << std::endl;
break;
}
*/
if(suffix != "")
{
install_embedded_font(font, suffix, new_fn_id);
@ -472,6 +474,124 @@ long long HTMLRenderer::install_font(GfxFont * font)
}
std::string HTMLRenderer::dump_embedded_font (GfxFont * font, long long fn_id)
{
// mupdf consulted
Object ref_obj, font_obj, font_obj2, fontdesc_obj;
Object obj, obj1, obj2;
Dict * dict = nullptr;
std::string suffix, subtype;
char buf[1024];
int len;
ofstream outf;
auto * id = font->getID();
ref_obj.initRef(id->num, id->gen);
ref_obj.fetch(xref, &font_obj);
ref_obj.free();
if(!font_obj.isDict())
{
std::cerr << "Font object is not a dictionary" << std::endl;
goto err;
}
dict = font_obj.getDict();
if(dict->lookup("DescendantFonts", &font_obj2)->isArray())
{
if(font_obj2.arrayGetLength() == 0)
{
std::cerr << "Warning: empty DescendantFonts array" << std::endl;
}
else
{
if(font_obj2.arrayGetLength() > 1)
std::cerr << "TODO: multiple entries in DescendantFonts array" << std::endl;
if(font_obj2.arrayGet(0, &obj2)->isDict())
{
dict = obj2.getDict();
}
}
}
if(!dict->lookup("FontDescriptor", &fontdesc_obj)->isDict())
{
std::cerr << "Cannot find FontDescriptor " << std::endl;
goto err;
}
dict = fontdesc_obj.getDict();
if(dict->lookup("FontFile3", &obj)->isStream())
{
if(obj.streamGetDict()->lookup("Subtype", &obj1)->isName())
{
subtype = obj1.getName();
if(subtype == "Type1C")
{
suffix = ".cff";
}
else if (subtype == "CIDFontType0C")
{
suffix = ".cid";
}
else
{
std::cerr << "Unknown subtype: " << subtype << std::endl;
goto err;
}
}
else
{
std::cerr << "Invalid subtype in font descriptor" << std::endl;
goto err;
}
}
else if (dict->lookup("FontFile2", &obj)->isStream())
{
suffix = ".ttf";
}
else if (dict->lookup("FontFile", &obj)->isStream())
{
suffix = ".ttf";
}
else
{
std::cerr << "Cannot find FontFile for dump" << std::endl;
goto err;
}
if(suffix == "")
{
std::cerr << "Font type unrecognized" << std::endl;
goto err;
}
obj.streamReset();
outf.open((boost::format("%1%/f%|2$x|%3%")%TMP_DIR%fn_id%suffix).str().c_str(), ofstream::binary);
while((len = obj.streamGetChars(1024, (Guchar*)buf)) > 0)
{
outf.write(buf, len);
}
outf.close();
obj.streamClose();
err:
obj2.free();
obj1.free();
obj.free();
fontdesc_obj.free();
font_obj2.free();
font_obj.free();
return suffix;
}
std::string HTMLRenderer::dump_embedded_type1_font (Ref * id, GfxFont * font, long long fn_id)
{
Object ref_obj, str_obj, ol1, ol2, ol3;
@ -667,7 +787,7 @@ std::string HTMLRenderer::dump_embedded_opentypet1c_font (GfxFont * font, long l
{
string fn = (boost::format("f%|1$x|")%fn_id).str();
ofstream tmpf((TMP_DIR + "/" + fn + ".ttf").c_str(), ofstream::binary);
FFTT->convertToType1((char*)(fn.c_str()), nullptr, true, output_to_file, &tmpf);
FFTT->writeTTF(output_to_file, &tmpf, (char*)(fn.c_str()), nullptr);
delete FFTT;
@ -752,11 +872,15 @@ std::string HTMLRenderer::dump_embedded_cidtype2_font(GfxFont * font, long long
if(FFTT != nullptr)
{
string fn = (boost::format("f%|1$x|")%fn_id).str();
ofstream tmpf((TMP_DIR + "/" + fn + ".pfa").c_str(), ofstream::binary);
ofstream tmpf((TMP_DIR + "/" + fn + ".ttf").c_str(), ofstream::binary);
int maplen;
FFTT->writeTTF(output_to_file, &tmpf, (char*)(fn.c_str()), dynamic_cast<GfxCIDFont*>(font)->getCodeToGIDMap(FFTT, &maplen));
/*
FFTT->convertToCIDType2((char*)(fn.c_str()),
dynamic_cast<GfxCIDFont*>(font)->getCIDToGID(),
dynamic_cast<GfxCIDFont*>(font)->getCIDToGIDLen(),
true, output_to_file, &tmpf);
*/
delete FFTT;
ok = true;
@ -768,7 +892,7 @@ std::string HTMLRenderer::dump_embedded_cidtype2_font(GfxFont * font, long long
gfree(font_buf);
}
return ok ? ".pfa" : "";
return ok ? ".ttf" : "";
}
void HTMLRenderer::install_embedded_font(GfxFont * font, const std::string & suffix, long long fn_id)
@ -780,27 +904,22 @@ void HTMLRenderer::install_embedded_font(GfxFont * font, const std::string & suf
{
auto ctu = font->getToUnicode();
ofstream map_fout((boost::format("%1%/%2%.encoding") % TMP_DIR % fn).str().c_str());
int maxcode = 0;
if(font->getType() < fontCIDType0)
{
for(int i = 0; i <= 0xff; ++i)
{
Unicode * u;
auto n = ctu->mapToUnicode(i, &u);
// not sure what to do when n > 1
if(n > 0)
{
map_fout << boost::format("0x%|1$X|") % i;
for(int j = 0; j < n; ++j)
map_fout << boost::format(" 0x%|1$X|") % u[j];
map_fout << boost::format(" # 0x%|1$X|") % i << endl;
}
}
maxcode = 0xff;
}
else
{
for(int i = 0; i <= 0xffff; ++i)
maxcode = 0xffff;
fontscript_fout << boost::format("Reencode(\"original\")") << endl;
}
if(maxcode > 0)
{
ofstream map_fout((boost::format("%1%/%2%.encoding") % TMP_DIR % fn).str().c_str());
for(int i = 0; i <= maxcode; ++i)
{
Unicode * u;
auto n = ctu->mapToUnicode(i, &u);
@ -813,10 +932,13 @@ void HTMLRenderer::install_embedded_font(GfxFont * font, const std::string & suf
map_fout << boost::format(" # 0x%|1$X|") % i << endl;
}
}
}
fontscript_fout << boost::format("LoadEncodingFile(\"%1%/%2%.encoding\", \"%2%\")") % TMP_DIR % fn << endl;
fontscript_fout << boost::format("Reencode(\"%1%\", 1)") % fn << endl;
}
ctu->decRefCnt();
}
fontscript_fout << boost::format("Generate(\"%1%.ttf\")") % fn << endl;
export_remote_font(fn_id, ".ttf", "truetype", font);

1
src/HTMLRenderer.h
View File

@ -101,6 +101,7 @@ class HTMLRenderer : public OutputDev
static void output_to_file(void * outf, const char * data, int len);
std::string dump_embedded_font (GfxFont * font, long long fn_id);
std::string dump_embedded_type1_font (Ref * id, GfxFont * font, long long fn_id);
std::string dump_embedded_type1c_font (GfxFont * font, long long fn_id);
std::string dump_embedded_opentypet1c_font (GfxFont * font, long long fn_id);