lib/python/gfx.c

   1 /* gfx.c
   2
   3    Python wrapper for gfx convert
   4
   5    Part of the swftools package.
   6
   7    Copyright (c) 2003 Matthias Kramm <kramm@quiss.org>
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
  22
  23 #include <Python.h>
  24 #undef HAVE_STAT
  25 #include "../devices/swf.h"
  26 #include "../devices/render.h"
  27 #include "../devices/rescale.h"
  28 #include "../devices/text.h"
  29 #include "../pdf/pdf.h"
  30 #include "../log.h"
  31 #include "../utf8.h"
  32
  33 gfxsource_t*pdfdriver;
  34
  35 staticforward PyTypeObject OutputClass;
  36 staticforward PyTypeObject PageClass;
  37 staticforward PyTypeObject DriverClass;
  38
  39 typedef struct {
  40     PyObject_HEAD
  41     gfxdevice_t*output_device;
  42 } OutputObject;
  43
  44 typedef struct {
  45     PyObject_HEAD
  46     PyObject*parent;
  47     gfxpage_t*page;
  48     int nr;
  49 } PageObject;
  50
  51 typedef struct {
  52     PyObject_HEAD
  53     gfxdocument_t*doc;
  54     char*filename;
  55 } DocObject;
  56
  57 static char* strf(char*format, ...)
  58 {
  59     char buf[1024];
  60     int l;
  61     va_list arglist;
  62     va_start(arglist, format);
  63     vsprintf(buf, format, arglist);
  64     va_end(arglist);
  65     return strdup(buf);
  66 }
  67 #define PY_ERROR(s,args...) (PyErr_SetString(PyExc_Exception, strf(s, ## args)),NULL)
  68 #define PY_NONE Py_BuildValue("s", 0)
  69
  70 //---------------------------------------------------------------------
  71 staticforward PyObject* output_save(PyObject* _self, PyObject* args, PyObject* kwargs);
  72 staticforward PyObject* output_startpage(PyObject* _self, PyObject* args, PyObject* kwargs);
  73 staticforward PyObject* output_endpage(PyObject* _self, PyObject* args, PyObject* kwargs);
  74
  75 static PyMethodDef output_methods[] =
  76 {
  77     /* Output functions */
  78     {"save", (PyCFunction)output_save, METH_KEYWORDS, ""},
  79     {"startpage", (PyCFunction)output_startpage, METH_KEYWORDS, ""},
  80     {"endpage", (PyCFunction)output_endpage, METH_KEYWORDS, ""},
  81     {0,0,0,0}
  82 };
  83 static PyObject* output_save(PyObject* _self, PyObject* args, PyObject* kwargs)
  84 {
  85     OutputObject* self = (OutputObject*)_self;
  86     char*filename = 0;
  87     static char *kwlist[] = {"filename", NULL};
  88     if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s", kwlist, &filename))
  89         return NULL;
  90
  91     gfxresult_t*result = self->output_device->finish(self->output_device);
  92     self->output_device = 0;
  93     if(result->save(result, filename) < 0) {
  94         return PY_ERROR("Couldn't write to %s", filename);
  95     }
  96     result->destroy(result);
  97     return PY_NONE;
  98 }
  99 static PyObject* output_startpage(PyObject* _self, PyObject* args, PyObject* kwargs)
 100 {
 101     OutputObject* self = (OutputObject*)_self;
 102     int width=0, height=0;
 103     if (!PyArg_ParseTuple(args, "ii", &width, &height))
 104         return NULL;
 105     self->output_device->startpage(self->output_device, width, height);
 106     return PY_NONE;
 107 }
 108 static PyObject* output_endpage(PyObject* _self, PyObject* args, PyObject* kwargs)
 109 {
 110     OutputObject* self = (OutputObject*)_self;
 111     if (!PyArg_ParseTuple(args, ""))
 112         return NULL;
 113     self->output_device->endpage(self->output_device);
 114     return PY_NONE;
 115 }
 116 static PyObject* f_createSWF(PyObject* parent, PyObject* args, PyObject* kwargs)
 117 {
 118     static char *kwlist[] = {NULL};
 119     if (!PyArg_ParseTupleAndKeywords(args, kwargs, "", kwlist))
 120         return NULL;
 121     OutputObject*self = PyObject_New(OutputObject, &OutputClass);
 122
 123     self->output_device = malloc(sizeof(gfxdevice_t));
 124     gfxdevice_swf_init(self->output_device);
 125     return (PyObject*)self;
 126 }
 127 static PyObject* f_createImageList(PyObject* parent, PyObject* args, PyObject* kwargs)
 128 {
 129     static char *kwlist[] = {NULL};
 130     if (!PyArg_ParseTupleAndKeywords(args, kwargs, "", kwlist))
 131         return NULL;
 132     OutputObject*self = PyObject_New(OutputObject, &OutputClass);
 133
 134     self->output_device = malloc(sizeof(gfxdevice_t));
 135     gfxdevice_render_init(self->output_device);
 136     return (PyObject*)self;
 137 }
 138 static PyObject* f_createPlainText(PyObject* parent, PyObject* args, PyObject* kwargs)
 139 {
 140     static char *kwlist[] = {NULL};
 141     if (!PyArg_ParseTupleAndKeywords(args, kwargs, "", kwlist))
 142         return NULL;
 143     OutputObject*self = PyObject_New(OutputObject, &OutputClass);
 144
 145     self->output_device = malloc(sizeof(gfxdevice_t));
 146     gfxdevice_text_init(self->output_device);
 147     return (PyObject*)self;
 148 }
 149
 150
 151 static void output_dealloc(PyObject* _self) {
 152     OutputObject* self = (OutputObject*)_self;
 153
 154     if(self->output_device) {
 155         gfxresult_t*result = self->output_device->finish(self->output_device);
 156         result->destroy(result);result=0;
 157         self->output_device = 0;
 158     }
 159
 160     PyObject_Del(self);
 161 }
 162 static PyObject* output_getattr(PyObject * _self, char* a)
 163 {
 164     OutputObject*self = (OutputObject*)_self;
 165
 166 /*    if(!strcmp(a, "x1")) {
 167         return PyInt_FromLong(self->output_device->x1);
 168     } else if(!strcmp(a, "y1")) {
 169         return PyInt_FromLong(self->output_device->y1);
 170     } else if(!strcmp(a, "x2")) {
 171         return PyInt_FromLong(self->output_device->x2);
 172     } else if(!strcmp(a, "y2")) {
 173         return PyInt_FromLong(self->output_device->y2);
 174     }*/
 175
 176     return Py_FindMethod(output_methods, _self, a);
 177 }
 178 static int output_setattr(PyObject * _self, char* a, PyObject * o)
 179 {
 180     OutputObject*self = (OutputObject*)_self;
 181     if(!PyString_Check(o))
 182         return -1;
 183     char*value = PyString_AsString(o);
 184     self->output_device->setparameter(self->output_device, a, value);
 185     return -1;
 186 }
 187 static int output_print(PyObject * _self, FILE *fi, int flags)
 188 {
 189     OutputObject*self = (OutputObject*)_self;
 190     fprintf(fi, "%08x(%d)", (int)_self, _self?_self->ob_refcnt:0);
 191     return 0;
 192 }
 193
 194 //---------------------------------------------------------------------
 195 staticforward PyObject* page_render(PyObject* _self, PyObject* args, PyObject* kwargs);
 196 staticforward PyObject* page_asImage(PyObject* _self, PyObject* args, PyObject* kwargs);
 197
 198 static PyMethodDef page_methods[] =
 199 {
 200     /* Page functions */
 201     {"render", (PyCFunction)page_render, METH_KEYWORDS, ""},
 202     {"asImage", (PyCFunction)page_asImage, METH_KEYWORDS, ""},
 203     {0,0,0,0}
 204 };
 205 static PyObject* page_render(PyObject* _self, PyObject* args, PyObject* kwargs)
 206 {
 207     PageObject* self = (PageObject*)_self;
 208
 209     static char *kwlist[] = {"dev", "move", "clip", NULL};
 210     OutputObject*output = 0;
 211     PyObject*move=0;
 212     PyObject*clip=0;
 213     if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O!|OO", kwlist, &OutputClass, &output,
 214                 &move,&clip
 215                 ))
 216         return NULL;
 217
 218     int x=0,y=0;
 219     int cx1=0,cy1=0,cx2=0,cy2=0;
 220
 221     if(move) {
 222         if (!PyArg_ParseTuple(move, "ii", &x,&y))
 223             return NULL;
 224     }
 225     if(clip) {
 226         if (!PyArg_ParseTuple(clip, "iiii", &cx1,&cy1,&cx2,&cy2))
 227             return NULL;
 228     }
 229
 230     if(x|y|cx1|cx2|cy1|cy2)
 231         self->page->rendersection(self->page, output->output_device,x,y,cx1,cy1,cx2,cy2);
 232     else
 233         self->page->render(self->page, output->output_device);
 234     return PY_NONE;
 235 }
 236
 237 static PyObject* page_asImage(PyObject* _self, PyObject* args, PyObject* kwargs)
 238 {
 239     PageObject* self = (PageObject*)_self;
 240
 241     static char *kwlist[] = {"width", "height", NULL};
 242     int width=0,height=0;
 243     if (!PyArg_ParseTupleAndKeywords(args, kwargs, "ii", kwlist, &width, &height))
 244         return NULL;
 245
 246     if(!width || !height) {
 247         return PY_ERROR("invalid dimensions: %dx%d", width,height);
 248     }
 249
 250     gfxdevice_t dev1,dev2;
 251     gfxdevice_render_init(&dev1);
 252     dev1.setparameter(&dev1, "antialise", "2");
 253     gfxdevice_rescale_init(&dev2, &dev1, width, height);
 254     dev2.startpage(&dev2, self->page->width, self->page->height);
 255     self->page->render(self->page, &dev2);
 256     dev2.endpage(&dev2);
 257     gfxresult_t*result = dev2.finish(&dev2);
 258     gfximage_t*img = (gfximage_t*)result->get(result,"page0");
 259     int l = img->width*img->height;
 260     unsigned char*data = malloc(img->width*img->height*3);
 261     int s,t;
 262     for(t=0,s=0;t<l;s+=3,t++) {
 263         data[s+0] = img->data[t].r;
 264         data[s+1] = img->data[t].g;
 265         data[s+2] = img->data[t].b;
 266     }
 267     result->destroy(result);
 268     return PyString_FromStringAndSize((char*)data,img->width*img->height*3);
 269 }
 270
 271 static void page_dealloc(PyObject* _self) {
 272     PageObject* self = (PageObject*)_self;
 273     if(self->page) {
 274         self->page->destroy(self->page);
 275         self->page=0;
 276     }
 277     if(self->parent) {
 278         Py_DECREF(self->parent);
 279         self->parent=0;
 280     }
 281
 282     PyObject_Del(self);
 283 }
 284 static PyObject* page_getattr(PyObject * _self, char* a)
 285 {
 286     PageObject*self = (PageObject*)_self;
 287
 288     if(!strcmp(a, "size")) {
 289         return Py_BuildValue("(ii)", self->page->width, self->page->height);
 290     } if(!strcmp(a, "doc")) {
 291         Py_INCREF(self->parent);
 292         return self->parent;
 293     } if(!strcmp(a, "nr")) {
 294         return PyInt_FromLong(self->nr);
 295     } else if(!strcmp(a, "width")) {
 296         return PyInt_FromLong(self->page->width);
 297     } else if(!strcmp(a, "height")) {
 298         return PyInt_FromLong(self->page->height);
 299     }
 300     return Py_FindMethod(page_methods, _self, a);
 301 }
 302 static int page_setattr(PyObject * self, char* a, PyObject * o) {
 303     return -1;
 304 }
 305 static int page_print(PyObject * _self, FILE *fi, int flags)
 306 {
 307     PageObject*self = (PageObject*)_self;
 308     fprintf(fi, "%08x(%d)", (int)_self, _self?_self->ob_refcnt:0);
 309     return 0;
 310 }
 311
 312 //---------------------------------------------------------------------
 313
 314 staticforward PyObject* doc_getPage(PyObject* parent, PyObject* args, PyObject* kwargs);
 315 staticforward PyObject* doc_getInfo(PyObject* parent, PyObject* args, PyObject* kwargs);
 316
 317 static PyMethodDef doc_methods[] =
 318 {
 319     /* PDF functions */
 320     {"getPage", (PyCFunction)doc_getPage, METH_KEYWORDS, ""},
 321     {"getInfo", (PyCFunction)doc_getInfo, METH_KEYWORDS, ""},
 322     {0,0,0,0}
 323 };
 324
 325 static PyObject* doc_getPage(PyObject* _self, PyObject* args, PyObject* kwargs)
 326 {
 327     DocObject* self = (DocObject*)_self;
 328
 329     static char *kwlist[] = {"nr", NULL};
 330     int pagenr = 0;
 331     if (!PyArg_ParseTupleAndKeywords(args, kwargs, "i", kwlist, &pagenr))
 332         return NULL;
 333
 334     PageObject*page = PyObject_New(PageObject, &PageClass);
 335     page->page = self->doc->getpage(self->doc, pagenr);
 336     page->nr = pagenr;
 337     page->parent = _self;
 338     Py_INCREF(page->parent);
 339     if(!page->page) {
 340         PyObject_Del(page);
 341         return PY_ERROR("Couldn't extract page %d", pagenr);
 342     }
 343     return (PyObject*)page;
 344 }
 345
 346 static PyObject* doc_getInfo(PyObject* _self, PyObject* args, PyObject* kwargs)
 347 {
 348     DocObject* self = (DocObject*)_self;
 349
 350     static char *kwlist[] = {"key", NULL};
 351     char*key = 0;
 352     if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s", kwlist, &key))
 353         return NULL;
 354
 355     char*s = self->doc->getinfo(self->doc, key);
 356     return PyString_FromString(s);
 357 }
 358
 359 static PyObject* f_open(PyObject* parent, PyObject* args, PyObject* kwargs)
 360 {
 361     static char *kwlist[] = {"type", "filename", NULL};
 362     char*filename;
 363     char*type;
 364     if (!PyArg_ParseTupleAndKeywords(args, kwargs, "ss", kwlist, &type, &filename))
 365         return NULL;
 366
 367     DocObject*self = PyObject_New(DocObject, &DriverClass);
 368
 369     if(!strcmp(type,"pdf"))
 370         self->doc = pdfdriver->open(filename);
 371     else
 372         return PY_ERROR("Unknown type %s", type);
 373
 374     if(!self->doc) {
 375         PyObject_Del(self);
 376         return PY_ERROR("Couldn't open %s", filename);
 377     }
 378     self->filename = strdup(filename);
 379     return (PyObject*)self;
 380 }
 381 static void doc_dealloc(PyObject* _self) {
 382     DocObject* self = (DocObject*)_self;
 383     if(self->doc) {
 384         self->doc->destroy(self->doc);
 385         self->doc=0;
 386     }
 387     if(self->filename) {
 388         free(self->filename);self->filename=0;
 389     }
 390     PyObject_Del(self);
 391 }
 392 static PyObject* doc_getattr(PyObject * _self, char* a)
 393 {
 394     DocObject*self = (DocObject*)_self;
 395     if(!strcmp(a, "pages")) {
 396         return PyInt_FromLong(self->doc->num_pages);
 397     }
 398     if(!strcmp(a, "filename")) {
 399         return PyString_FromString(self->filename);
 400     }
 401     return Py_FindMethod(doc_methods, _self, a);
 402 }
 403 static int doc_setattr(PyObject * self, char* a, PyObject * o) {
 404     return -1;
 405 }
 406 static int doc_print(PyObject * _self, FILE *fi, int flags)
 407 {
 408     DocObject*self = (DocObject*)_self;
 409     fprintf(fi, "%08x(%d)", (int)_self, _self?_self->ob_refcnt:0);
 410     return 0;
 411 }
 412
 413 //---------------------------------------------------------------------
 414
 415 static PyTypeObject OutputClass =
 416 {
 417     PyObject_HEAD_INIT(NULL)
 418     0,
 419     tp_name: "Output",
 420     tp_basicsize: sizeof(OutputObject),
 421     tp_itemsize: 0,
 422     tp_dealloc: output_dealloc,
 423     tp_print: output_print,
 424     tp_getattr: output_getattr,
 425     tp_setattr: output_setattr,
 426 };
 427 static PyTypeObject PageClass =
 428 {
 429     PyObject_HEAD_INIT(NULL)
 430     0,
 431     tp_name: "Page",
 432     tp_basicsize: sizeof(PageObject),
 433     tp_itemsize: 0,
 434     tp_dealloc: page_dealloc,
 435     tp_print: page_print,
 436     tp_getattr: page_getattr,
 437     tp_setattr: page_setattr,
 438 };
 439 static PyTypeObject DriverClass =
 440 {
 441     PyObject_HEAD_INIT(NULL)
 442     0,
 443     tp_name: "PDF",
 444     tp_basicsize: sizeof(DocObject),
 445     tp_itemsize: 0,
 446     tp_dealloc: doc_dealloc,
 447     tp_print: doc_print,
 448     tp_getattr: doc_getattr,
 449     tp_setattr: doc_setattr,
 450 };
 451
 452 //=====================================================================
 453
 454 static PyObject* f_setoption(PyObject* self, PyObject* args, PyObject* kwargs)
 455 {
 456     static char *kwlist[] = {"key", "value", NULL};
 457     char*key=0,*value=0;
 458     if (!PyArg_ParseTupleAndKeywords(args, kwargs, "ss", kwlist, &key, &value))
 459         return NULL;
 460     pdfdriver->set_parameter(key,value);
 461     return PY_NONE;
 462 }
 463
 464 static PyObject* f_verbose(PyObject* self, PyObject* args, PyObject* kwargs)
 465 {
 466     static char *kwlist[] = {"val", NULL};
 467     int val;
 468     if (!PyArg_ParseTupleAndKeywords(args, kwargs, "i", kwlist, &val))
 469         return NULL;
 470     setConsoleLogging(val);
 471     return PY_NONE;
 472 }
 473
 474 static PyObject* f_addfont(PyObject* self, PyObject* args, PyObject* kwargs)
 475 {
 476     static char *kwlist[] = {"filename", NULL};
 477     char*filename=0;
 478     if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s", kwlist, &filename))
 479         return NULL;
 480     pdfdriver->set_parameter("font", filename);
 481     return PY_NONE;
 482 }
 483
 484 static PyObject* f_addfontdir(PyObject* self, PyObject* args, PyObject* kwargs)
 485 {
 486     static char *kwlist[] = {"filename", NULL};
 487     char*filename=0;
 488     if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s", kwlist, &filename))
 489         return NULL;
 490     pdfdriver->set_parameter("fontdir", filename);
 491     return PY_NONE;
 492 }
 493
 494 static PyMethodDef pdf2swf_methods[] =
 495 {
 496     /* sources */
 497     {"open", (PyCFunction)f_open, METH_KEYWORDS, ""},
 498     {"addfont", (PyCFunction)f_addfont, METH_KEYWORDS, ""},
 499     {"addfontdir", (PyCFunction)f_addfontdir, METH_KEYWORDS, ""},
 500     {"setoption", (PyCFunction)f_setoption, METH_KEYWORDS, ""},
 501     {"verbose", (PyCFunction)f_verbose, METH_KEYWORDS, ""},
 502
 503     /* devices */
 504     {"SWF", (PyCFunction)f_createSWF, METH_KEYWORDS, ""},
 505     {"ImageList", (PyCFunction)f_createImageList, METH_KEYWORDS, ""},
 506     {"PlainText", (PyCFunction)f_createPlainText, METH_KEYWORDS, ""},
 507
 508     /* sentinel */
 509     {0, 0, 0, 0}
 510 };
 511
 512 void initgfx(void)
 513 {
 514     initLog(0,0,0,0,0,2);
 515     OutputClass.ob_type = &PyType_Type;
 516     PageClass.ob_type = &PyType_Type;
 517     DriverClass.ob_type = &PyType_Type;
 518
 519     pdfdriver = gfxsource_pdf_create();
 520
 521     PyObject*module = Py_InitModule("gfx", pdf2swf_methods);
 522 }