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GeezerVison is showing github.com — matplotlib/src/_ttconv.cpp at master · feisuo/matplotlib Expand file tree/ Copy path_ttconv.cppMore file actions 307 lines (269 loc) · 8.15 KB / Copy path_ttconv.cppFile metadata and controls307 lines (269 loc) · 8.15 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 /* -*- 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 "py_exceptions.h" #include <vector> #include <cassert> /** * 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) { PyObject *decoded = NULL; decoded = PyUnicode_DecodeLatin1(a, strlen(a), ""); if (decoded == NULL) { throw py::exception(); } result = PyObject_CallFunction(_write_method, (char *)"O", decoded); Py_DECREF(decoded); if (!result) { throw py::exception(); } 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((int)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, #if PY_MAJOR_VERSION == 3 "yO&i|O&:convert_ttf_to_ps", #else "sO&i|O&:convert_ttf_to_ps", #endif (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 (const py::exception &) { 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) { assert(a != NULL); assert(b != NULL); PyObject *value = PyBytes_FromString(b); if (!value) { throw py::exception(); } if (PyDict_SetItemString(_dict, a, value)) { Py_DECREF(value); throw py::exception(); } 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, #if PY_MAJOR_VERSION == 3 "y|O&:get_pdf_charprocs", #else "s|O&:get_pdf_charprocs", #endif (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 (const py::exception &) { 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) { Py_InitModule3("ttconv", ttconv_methods, module_docstring); } #endif |
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