matplotlib/src/_ttconv.cpp at master · gitj/matplotlib · GitHub

Repository navigation

History

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

/* -*- mode: c++; c-basic-offset: 4 -*- */

_ttconv.c

Python wrapper for TrueType conversion library in ../ttconv.

#include "mplutils.h"

#include <Python.h>

#include "ttconv/pprdrv.h"

#include <vector>

class PythonExceptionOccurred

{

};

/**

* An implementation of TTStreamWriter that writes to a Python

* file-like object.

class PythonFileWriter : public TTStreamWriter

{

PyObject* _write_method;

public:

PythonFileWriter()

{

_write_method = NULL;

}

~PythonFileWriter()

{

Py_XDECREF(_write_method);

}

void set(PyObject* write_method)

{

Py_XDECREF(_write_method);

_write_method = write_method;

Py_XINCREF(_write_method);

}

virtual void write(const char* a)

{

PyObject* result = NULL;

if (_write_method)

{

#if PY3K

result = PyObject_CallFunction(_write_method, (char *)"y", a);

#else

result = PyObject_CallFunction(_write_method, (char *)"s", a);

#endif

if (! result)

{

throw PythonExceptionOccurred();

}

Py_DECREF(result);

}

};

int fileobject_to_PythonFileWriter(PyObject* object, void* address)

{

PythonFileWriter* file_writer = (PythonFileWriter*)address;

PyObject* write_method = PyObject_GetAttrString(object, "write");

if (write_method == NULL || ! PyCallable_Check(write_method))

{

PyErr_SetString(PyExc_TypeError, "Expected a file-like object with a write method.");

return 0;

}

file_writer->set(write_method);

Py_DECREF(write_method);

return 1;

}

int pyiterable_to_vector_int(PyObject* object, void* address)

{

std::vector<int>* result = (std::vector<int>*)address;

PyObject* iterator = PyObject_GetIter(object);

if (! iterator)

{

return 0;

}

PyObject* item;

while ((item = PyIter_Next(iterator)))

{

#if PY3K

long value = PyLong_AsLong(item);

#else

long value = PyInt_AsLong(item);

#endif

Py_DECREF(item);

if (value == -1 && PyErr_Occurred())

{

return 0;

}

result->push_back(value);

}

Py_DECREF(iterator);

return 1;

}

static PyObject*

convert_ttf_to_ps(PyObject* self, PyObject* args, PyObject* kwds)

{

const char* filename;

PythonFileWriter output;

int fonttype;

std::vector<int> glyph_ids;

static const char *kwlist[] =

{

"filename", "output", "fonttype", "glyph_ids", NULL

};

if (! PyArg_ParseTupleAndKeywords

(args, kwds,

"sO&i|O&:convert_ttf_to_ps",

(char**)kwlist,

&filename,

fileobject_to_PythonFileWriter,

&output,

&fonttype,

pyiterable_to_vector_int,

&glyph_ids))

{

return NULL;

}

if (fonttype != 3 && fonttype != 42)

{

PyErr_SetString(PyExc_ValueError,

"fonttype must be either 3 (raw Postscript) or 42 "

"(embedded Truetype)");

return NULL;

}

try

{

insert_ttfont(filename, output, (font_type_enum)fonttype, glyph_ids);

}

catch (TTException& e)

{

PyErr_SetString(PyExc_RuntimeError, e.getMessage());

return NULL;

}

catch (PythonExceptionOccurred&)

{

return NULL;

}

catch (...)

{

PyErr_SetString(PyExc_RuntimeError, "Unknown C++ exception");

return NULL;

}

Py_INCREF(Py_None);

return Py_None;

}

class PythonDictionaryCallback : public TTDictionaryCallback

{

PyObject* _dict;

public:

PythonDictionaryCallback(PyObject* dict)

{

_dict = dict;

}

virtual void add_pair(const char* a, const char* b)

{

PyObject* value = PyBytes_FromString(b);

if (value)

{

if (PyDict_SetItemString(_dict, a, value))

{

Py_DECREF(value);

throw PythonExceptionOccurred();

}

Py_DECREF(value);

}

};

static PyObject*

py_get_pdf_charprocs(PyObject* self, PyObject* args, PyObject* kwds)

{

const char* filename;

std::vector<int> glyph_ids;

PyObject* result;

static const char *kwlist[] = { "filename", "glyph_ids", NULL };

if (! PyArg_ParseTupleAndKeywords

(args, kwds,

"s|O&:get_pdf_charprocs",

(char **)kwlist,

&filename,

pyiterable_to_vector_int,

&glyph_ids))

{

return NULL;

}

result = PyDict_New();

if (!result)

{

return NULL;

}

PythonDictionaryCallback dict(result);

try

{

::get_pdf_charprocs(filename, glyph_ids, dict);

}

catch (TTException& e)

{

Py_DECREF(result);

PyErr_SetString(PyExc_RuntimeError, e.getMessage());

return NULL;

}

catch (PythonExceptionOccurred&)

{

Py_DECREF(result);

return NULL;

}

catch (...)

{

Py_DECREF(result);

PyErr_SetString(PyExc_RuntimeError, "Unknown C++ exception");

return NULL;

}

return result;

}

static PyMethodDef ttconv_methods[] =

{

"convert_ttf_to_ps", (PyCFunction)convert_ttf_to_ps, METH_VARARGS | METH_KEYWORDS,

"convert_ttf_to_ps(filename, output, fonttype, glyph_ids)\n"

"\n"

"Converts the Truetype font into a Type 3 or Type 42 Postscript font, "

"optionally subsetting the font to only the desired set of characters.\n"

"\n"

"filename is the path to a TTF font file.\n"

"output is a Python file-like object with a write method that the Postscript "

"font data will be written to.\n"

"fonttype may be either 3 or 42. Type 3 is a \"raw Postscript\" font. "

"Type 42 is an embedded Truetype font. Glyph subsetting is not supported "

"for Type 42 fonts.\n"

"glyph_ids (optional) is a list of glyph ids (integers) to keep when "

"subsetting to a Type 3 font. If glyph_ids is not provided or is None, "

"then all glyphs will be included. If any of the glyphs specified are "

"composite glyphs, then the component glyphs will also be included."

{

"get_pdf_charprocs", (PyCFunction)py_get_pdf_charprocs, METH_VARARGS | METH_KEYWORDS,

"get_pdf_charprocs(filename, glyph_ids)\n"

"\n"

"Given a Truetype font file, returns a dictionary containing the PDF Type 3\n"

"representation of its paths. Useful for subsetting a Truetype font inside\n"

"of a PDF file.\n"

"\n"

"filename is the path to a TTF font file.\n"

"glyph_ids is a list of the numeric glyph ids to include.\n"

"The return value is a dictionary where the keys are glyph names and\n"

"the values are the stream content needed to render that glyph. This\n"

"is useful to generate the CharProcs dictionary in a PDF Type 3 font.\n"

{0, 0, 0, 0} /* Sentinel */

};

static const char* module_docstring =

"Module to handle converting and subsetting TrueType "

"fonts to Postscript Type 3, Postscript Type 42 and "

"Pdf Type 3 fonts.";

#if PY3K

static PyModuleDef ttconv_module = {

PyModuleDef_HEAD_INIT,

"ttconv",

module_docstring,

-1,

ttconv_methods,

NULL, NULL, NULL, NULL

};

PyMODINIT_FUNC

PyInit_ttconv(void)

{

PyObject* m;

m = PyModule_Create(&ttconv_module);

return m;

}

#else

PyMODINIT_FUNC

initttconv(void)

{

PyObject* m;

m = Py_InitModule3("ttconv", ttconv_methods, module_docstring);

}

#endif

matplotlib/src/_ttconv.cpp at master · gitj/matplotlib · GitHub

Repository navigation

Expand file tree

Breadcrumbs

_ttconv.cpp

Latest commit

History

Breadcrumbs

_ttconv.cpp

File metadata and controls