1 #define __SP_PDF_CAIRO_C__
3 /** \file
4 * PDF printing with Cairo.
5 */
6 /*
7 * Authors:
8 * Miklós Erdélyi <erdelyim@gmail.com>
9 *
10 * Based on pdf.cpp
11 *
12 * Licensed under GNU GPL
13 */
15 /* Plain Print */
17 #ifdef HAVE_CONFIG_H
18 # include "config.h"
19 #endif
21 #ifndef PANGO_ENABLE_BACKEND
22 #define PANGO_ENABLE_BACKEND
23 #endif
25 #ifndef PANGO_ENABLE_ENGINE
26 #define PANGO_ENABLE_ENGINE
27 #endif
30 #include <signal.h>
31 #include <errno.h>
33 #include <libnr/n-art-bpath.h>
35 #include <glib/gmem.h>
36 #include <gtk/gtkstock.h>
37 #include <gtk/gtkvbox.h>
38 #include <gtk/gtkframe.h>
39 #include <gtk/gtkradiobutton.h>
40 #include <gtk/gtkcombo.h>
41 #include <gtk/gtklabel.h>
42 #include <gtk/gtkentry.h>
43 #include <gtk/gtktooltips.h>
45 #include <glibmm/i18n.h>
46 #include "display/nr-arena-item.h"
47 #include "display/canvas-bpath.h"
48 #include "sp-item.h"
49 #include "style.h"
50 #include "sp-linear-gradient.h"
51 #include "sp-radial-gradient.h"
53 #include "libnrtype/font-instance.h"
54 #include "libnrtype/font-style-to-pos.h"
56 #include <unit-constants.h>
58 #include "pdf-cairo.h"
59 #include "extension/system.h"
60 #include "extension/print.h"
62 #include "io/sys.h"
64 #include <cairo.h>
65 #include <cairo-pdf.h>
66 #include <cairo-ft.h>
68 #include <pango/pango.h>
69 #include <pango/pangofc-fontmap.h>
71 #ifdef RENDER_WITH_PANGO_CAIRO
72 #include <pango/pangocairo.h>
73 #endif
75 namespace Inkscape {
76 namespace Extension {
77 namespace Internal {
79 static cairo_status_t _write_callback(void *closure, const unsigned char *data, unsigned int length);
80 static void _concat_transform(cairo_t *cr, double xx, double yx, double xy, double yy, double x0, double y0);
82 PrintCairoPDF::PrintCairoPDF() :
83 cr(NULL),
84 pdf_surface(NULL),
85 _layout(NULL),
86 _dpi(72),
87 _bitmap(false)
88 {
89 }
91 PrintCairoPDF::~PrintCairoPDF(void)
92 {
93 if (cr) cairo_destroy(cr);
94 if (pdf_surface) cairo_surface_destroy(pdf_surface);
95 if (_layout) g_object_unref(_layout);
97 /* restore default signal handling for SIGPIPE */
98 #if !defined(_WIN32) && !defined(__WIN32__)
99 (void) signal(SIGPIPE, SIG_DFL);
100 #endif
102 return;
103 }
105 unsigned int
106 PrintCairoPDF::setup(Inkscape::Extension::Print * mod)
107 {
108 static gchar const *const pdr[] = {"72", "75", "100", "144", "150", "200", "300", "360", "600", "1200", "2400", NULL};
110 #ifdef TED
111 Inkscape::XML::Node *repr = ((SPModule *) mod)->repr;
112 #endif
114 unsigned int ret = FALSE;
116 /* Create dialog */
117 GtkTooltips *tt = gtk_tooltips_new();
118 g_object_ref((GObject *) tt);
119 gtk_object_sink((GtkObject *) tt);
121 GtkWidget *dlg = gtk_dialog_new_with_buttons(_("Print Destination"),
122 // SP_DT_WIDGET(SP_ACTIVE_DESKTOP)->window,
123 NULL,
124 (GtkDialogFlags) (GTK_DIALOG_MODAL | GTK_DIALOG_NO_SEPARATOR | GTK_DIALOG_DESTROY_WITH_PARENT),
125 GTK_STOCK_CANCEL,
126 GTK_RESPONSE_CANCEL,
127 GTK_STOCK_PRINT,
128 GTK_RESPONSE_OK,
129 NULL);
131 gtk_dialog_set_default_response(GTK_DIALOG(dlg), GTK_RESPONSE_OK);
133 GtkWidget *vbox = GTK_DIALOG(dlg)->vbox;
134 gtk_container_set_border_width(GTK_CONTAINER(vbox), 4);
135 /* Print properties frame */
136 GtkWidget *f = gtk_frame_new(_("Print properties"));
137 gtk_box_pack_start(GTK_BOX(vbox), f, FALSE, FALSE, 4);
138 GtkWidget *vb = gtk_vbox_new(FALSE, 4);
139 gtk_container_add(GTK_CONTAINER(f), vb);
140 gtk_container_set_border_width(GTK_CONTAINER(vb), 4);
141 /* Print type */
142 bool const p2bm = mod->get_param_bool("bitmap");
143 GtkWidget *rb = gtk_radio_button_new_with_label(NULL, _("Print using PDF operators"));
144 gtk_tooltips_set_tip((GtkTooltips *) tt, rb,
145 _("Use PDF vector operators. The resulting image is usually smaller "
146 "in file size and can be arbitrarily scaled, but "
147 "patterns will be lost."), NULL);
148 if (!p2bm) gtk_toggle_button_set_active((GtkToggleButton *) rb, TRUE);
149 gtk_box_pack_start(GTK_BOX(vb), rb, FALSE, FALSE, 0);
150 rb = gtk_radio_button_new_with_label(gtk_radio_button_get_group((GtkRadioButton *) rb), _("Print as bitmap"));
151 gtk_tooltips_set_tip((GtkTooltips *) tt, rb,
152 _("Print everything as bitmap. The resulting image is usually larger "
153 "in file size and cannot be arbitrarily scaled without quality loss, "
154 "but all objects will be rendered exactly as displayed."), NULL);
155 if (p2bm) gtk_toggle_button_set_active((GtkToggleButton *) rb, TRUE);
156 gtk_box_pack_start(GTK_BOX(vb), rb, FALSE, FALSE, 0);
157 /* Resolution */
158 GtkWidget *hb = gtk_hbox_new(FALSE, 4);
159 gtk_box_pack_start(GTK_BOX(vb), hb, FALSE, FALSE, 0);
160 GtkWidget *combo = gtk_combo_new();
161 gtk_combo_set_value_in_list(GTK_COMBO(combo), FALSE, FALSE);
162 gtk_combo_set_use_arrows(GTK_COMBO(combo), TRUE);
163 gtk_combo_set_use_arrows_always(GTK_COMBO(combo), TRUE);
164 gtk_widget_set_size_request(combo, 64, -1);
165 gtk_tooltips_set_tip((GtkTooltips *) tt, GTK_COMBO(combo)->entry,
166 _("Preferred resolution (dots per inch) of bitmap"), NULL);
167 /* Setup strings */
168 GList *sl = NULL;
169 for (unsigned i = 0; pdr[i] != NULL; i++) {
170 sl = g_list_prepend(sl, (gpointer) pdr[i]);
171 }
172 sl = g_list_reverse(sl);
173 gtk_combo_set_popdown_strings(GTK_COMBO(combo), sl);
174 g_list_free(sl);
175 if (1) {
176 gchar const *val = mod->get_param_string("resolution");
177 gtk_entry_set_text(GTK_ENTRY(GTK_COMBO(combo)->entry), val);
178 }
179 gtk_box_pack_end(GTK_BOX(hb), combo, FALSE, FALSE, 0);
180 GtkWidget *l = gtk_label_new(_("Resolution:"));
181 gtk_box_pack_end(GTK_BOX(hb), l, FALSE, FALSE, 0);
183 /* Print destination frame */
184 f = gtk_frame_new(_("Print destination"));
185 gtk_box_pack_start(GTK_BOX(vbox), f, FALSE, FALSE, 4);
186 vb = gtk_vbox_new(FALSE, 4);
187 gtk_container_add(GTK_CONTAINER(f), vb);
188 gtk_container_set_border_width(GTK_CONTAINER(vb), 4);
190 l = gtk_label_new(_("Printer name (as given by lpstat -p);\n"
191 "leave empty to use the system default printer.\n"
192 "Use '> filename' to print to file.\n"
193 "Use '| prog arg...' to pipe to a program."));
194 gtk_box_pack_start(GTK_BOX(vb), l, FALSE, FALSE, 0);
196 GtkWidget *e = gtk_entry_new();
197 if (1) {
198 gchar const *val = mod->get_param_string("destination");
199 gtk_entry_set_text(GTK_ENTRY(e), ( val != NULL
200 ? val
201 : "" ));
202 }
203 gtk_box_pack_start(GTK_BOX(vb), e, FALSE, FALSE, 0);
205 // pressing enter in the destination field is the same as clicking Print:
206 gtk_entry_set_activates_default(GTK_ENTRY(e), TRUE);
208 gtk_widget_show_all(vbox);
210 int const response = gtk_dialog_run(GTK_DIALOG(dlg));
212 g_object_unref((GObject *) tt);
214 if (response == GTK_RESPONSE_OK) {
215 gchar const *fn;
216 char const *sstr;
218 _bitmap = gtk_toggle_button_get_active((GtkToggleButton *) rb);
219 sstr = gtk_entry_get_text(GTK_ENTRY(GTK_COMBO(combo)->entry));
220 _dpi = (unsigned int) MAX((int)(atof(sstr)), 1);
221 /* Arrgh, have to do something */
222 fn = gtk_entry_get_text(GTK_ENTRY(e));
223 /* skip leading whitespace, bug #1068483 */
224 while (fn && *fn==' ') { fn++; }
225 /* g_print("Printing to %s\n", fn); */
227 mod->set_param_bool("bitmap", _bitmap);
228 mod->set_param_string("resolution", (gchar *)sstr);
229 mod->set_param_string("destination", (gchar *)fn);
230 ret = TRUE;
231 }
233 gtk_widget_destroy(dlg);
235 return ret;
236 }
238 unsigned int
239 PrintCairoPDF::begin(Inkscape::Extension::Print *mod, SPDocument *doc)
240 {
241 FILE *osf = NULL;
242 FILE *osp = NULL;
244 _alpha_stack.clear();
245 _alpha_stack.push_back(1.0);
247 gsize bytesRead = 0;
248 gsize bytesWritten = 0;
249 GError *error = NULL;
250 gchar const *utf8_fn = mod->get_param_string("destination");
251 gchar *local_fn = g_filename_from_utf8( utf8_fn,
252 -1, &bytesRead, &bytesWritten, &error);
253 gchar const *fn = local_fn;
255 /* TODO: Replace the below fprintf's with something that does the right thing whether in
256 * gui or batch mode (e.g. --print=blah). Consider throwing an exception: currently one of
257 * the callers (sp_print_document_to_file, "ret = mod->begin(doc)") wrongly ignores the
258 * return code.
259 */
260 if (fn != NULL) {
261 if (*fn == '|') {
262 fn += 1;
263 while (isspace(*fn)) fn += 1;
264 #ifndef WIN32
265 osp = popen(fn, "w");
266 #else
267 osp = _popen(fn, "w");
268 #endif
269 if (!osp) {
270 fprintf(stderr, "inkscape: popen(%s): %s\n",
271 fn, strerror(errno));
272 return 0;
273 }
274 _stream = osp;
275 } else if (*fn == '>') {
276 fn += 1;
277 while (isspace(*fn)) fn += 1;
278 Inkscape::IO::dump_fopen_call(fn, "K");
279 osf = Inkscape::IO::fopen_utf8name(fn, "w+");
280 if (!osf) {
281 fprintf(stderr, "inkscape: fopen(%s): %s\n",
282 fn, strerror(errno));
283 return 0;
284 }
285 _stream = osf;
286 } else {
287 /* put cwd stuff in here */
288 gchar *qn = ( *fn
289 ? g_strdup_printf("lpr -P %s", fn) /* FIXME: quote fn */
290 : g_strdup("lpr") );
291 #ifndef WIN32
292 osp = popen(qn, "w");
293 #else
294 osp = _popen(qn, "w");
295 #endif
296 if (!osp) {
297 fprintf(stderr, "inkscape: popen(%s): %s\n",
298 qn, strerror(errno));
299 return 0;
300 }
301 g_free(qn);
302 _stream = osp;
303 }
304 }
306 g_free(local_fn);
308 if (_stream) {
309 /* fixme: this is kinda icky */
310 #if !defined(_WIN32) && !defined(__WIN32__)
311 (void) signal(SIGPIPE, SIG_IGN);
312 #endif
313 }
315 // test output stream?
317 // width and height in pt
318 _width = sp_document_width(doc) * PT_PER_PX;
319 _height = sp_document_height(doc) * PT_PER_PX;
321 NRRect d;
322 bool pageBoundingBox;
323 pageBoundingBox = mod->get_param_bool("pageBoundingBox");
324 // printf("Page Bounding Box: %s\n", pageBoundingBox ? "TRUE" : "FALSE");
325 if (pageBoundingBox) {
326 d.x0 = d.y0 = 0;
327 d.x1 = _width;
328 d.y1 = _height;
329 } else {
330 SPItem* doc_item = SP_ITEM(sp_document_root(doc));
331 sp_item_invoke_bbox(doc_item, &d, sp_item_i2r_affine(doc_item), TRUE);
332 // convert from px to pt
333 d.x0 *= PT_PER_PX;
334 d.x1 *= PT_PER_PX;
335 d.y0 *= PT_PER_PX;
336 d.y1 *= PT_PER_PX;
337 }
338 printf("%f %f\n", _width, _height);
340 pdf_surface = cairo_pdf_surface_create_for_stream(Inkscape::Extension::Internal::_write_callback, _stream, d.x1-d.x0, d.y1-d.y0);
341 cr = cairo_create(pdf_surface);
343 if (!_bitmap) {
344 cairo_scale(cr, PT_PER_PX, PT_PER_PX);
346 // from now on we can output px, but they will be treated as pt
347 // note that the we do not have to flip the y axis
348 // because Cairo's coordinate system is identical to Inkscape's
349 }
351 return 1;
352 }
354 unsigned int
355 PrintCairoPDF::finish(Inkscape::Extension::Print *mod)
356 {
357 if (!_stream) return 0;
358 if (_bitmap) return 0;
360 cairo_show_page(cr);
362 cairo_destroy(cr);
363 cairo_surface_destroy(pdf_surface);
364 cr = NULL;
365 pdf_surface = NULL;
367 /* Flush stream to be sure. */
368 (void) fflush(_stream);
370 /* fixme: should really use pclose for popen'd streams */
371 fclose(_stream);
372 _stream = 0;
374 return 1;
375 }
377 unsigned int
378 PrintCairoPDF::bind(Inkscape::Extension::Print *mod, NRMatrix const *transform, float opacity)
379 {
380 if (!_stream) return 0; // XXX: fixme, returning -1 as unsigned.
381 if (_bitmap) return 0;
383 cairo_save(cr);
384 _concat_transform(cr, transform->c[0], transform->c[1], transform->c[2], transform->c[3], transform->c[4], transform->c[5]);
385 // g_printf("bind: (%f) %f %f %f %f %f %f\n", opacity, transform->c[0], transform->c[1], transform->c[2], transform->c[3], transform->c[4], transform->c[5]);
386 // remember these to be able to undo them when outputting text
387 _last_tx = transform->c[4];
388 _last_ty = transform->c[5];
390 float new_opacity = _alpha_stack.back() * opacity;
391 _alpha_stack.push_back(new_opacity);
393 return 1;
394 }
396 unsigned int
397 PrintCairoPDF::release(Inkscape::Extension::Print *mod)
398 {
399 if (!_stream) return 0; // XXX: fixme, returning -1 as unsigned.
400 if (_bitmap) return 0;
402 cairo_restore(cr);
403 // g_printf("release\n");
404 _alpha_stack.pop_back();
405 g_assert(_alpha_stack.size() > 0);
407 return 1;
408 }
410 unsigned int
411 PrintCairoPDF::comment(Inkscape::Extension::Print *mod, char const *comment)
412 {
413 if (!_stream) return 0; // XXX: fixme, returning -1 as unsigned.
414 if (_bitmap) return 0;
416 return 1;
417 }
419 cairo_pattern_t*
420 PrintCairoPDF::create_pattern_for_paint(SPPaintServer const *const paintserver, NRRect const *pbox, float alpha)
421 {
422 cairo_pattern_t *pattern = NULL;
423 bool apply_bbox2user = false;
425 if (SP_IS_LINEARGRADIENT (paintserver)) {
427 SPLinearGradient *lg=SP_LINEARGRADIENT(paintserver);
429 sp_gradient_ensure_vector(SP_GRADIENT(lg)); // when exporting from commandline, vector is not built
431 NR::Point p1 (lg->x1.computed, lg->y1.computed);
432 NR::Point p2 (lg->x2.computed, lg->y2.computed);
433 if (pbox && SP_GRADIENT(lg)->units == SP_GRADIENT_UNITS_OBJECTBOUNDINGBOX) {
434 // convert to userspace
435 NR::Matrix bbox2user(pbox->x1 - pbox->x0, 0, 0, pbox->y1 - pbox->y0, pbox->x0, pbox->y0);
436 p1 *= bbox2user;
437 p2 *= bbox2user;
438 }
440 // create linear gradient pattern
441 pattern = cairo_pattern_create_linear(p1[NR::X], p1[NR::Y], p2[NR::X], p2[NR::Y]);
443 // add stops
444 for (gint i = 0; unsigned(i) < lg->vector.stops.size(); i++) {
445 float rgb[3];
446 sp_color_get_rgb_floatv(&lg->vector.stops[i].color, rgb);
447 cairo_pattern_add_color_stop_rgba(pattern, lg->vector.stops[i].offset, rgb[0], rgb[1], rgb[2], lg->vector.stops[i].opacity * alpha);
448 }
449 } else if (SP_IS_RADIALGRADIENT (paintserver)) {
451 SPRadialGradient *rg=SP_RADIALGRADIENT(paintserver);
453 sp_gradient_ensure_vector(SP_GRADIENT(rg)); // when exporting from commandline, vector is not built
455 NR::Point c (rg->cx.computed, rg->cy.computed);
456 NR::Point f (rg->fx.computed, rg->fy.computed);
457 double r = rg->r.computed;
459 NR::Coord const df = hypot(f[NR::X] - c[NR::X], f[NR::Y] - c[NR::Y]);
460 if (df >= r) {
461 f[NR::X] = c[NR::X] + (f[NR::X] - c[NR::X] ) * r / (float) df;
462 f[NR::Y] = c[NR::Y] + (f[NR::Y] - c[NR::Y] ) * r / (float) df;
463 }
465 if (pbox && SP_GRADIENT(rg)->units == SP_GRADIENT_UNITS_OBJECTBOUNDINGBOX)
466 apply_bbox2user = true;
468 // create radial gradient pattern
469 pattern = cairo_pattern_create_radial(f[NR::X], f[NR::Y], 0, c[NR::X], c[NR::Y], r);
471 // add stops
472 for (gint i = 0; unsigned(i) < rg->vector.stops.size(); i++) {
473 float rgb[3];
474 sp_color_get_rgb_floatv(&rg->vector.stops[i].color, rgb);
475 cairo_pattern_add_color_stop_rgba(pattern, rg->vector.stops[i].offset, rgb[0], rgb[1], rgb[2], rg->vector.stops[i].opacity * alpha);
476 }
477 }
479 if (pattern) {
480 SPGradient *g = SP_GRADIENT(paintserver);
482 // set extend type
483 SPGradientSpread spread = sp_gradient_get_spread(g);
484 switch (spread) {
485 case SP_GRADIENT_SPREAD_REPEAT:
486 cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
487 break;
488 case SP_GRADIENT_SPREAD_REFLECT: // not supported by cairo-pdf yet
489 //cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REFLECT);
490 //break;
491 case SP_GRADIENT_SPREAD_PAD:
492 default:
493 cairo_pattern_set_extend(pattern, CAIRO_EXTEND_NONE); // PAD not supported by cairo-pdf yet
494 break;
495 }
497 cairo_matrix_t pattern_matrix;
498 if (g->gradientTransform_set) {
499 // apply gradient transformation
500 cairo_matrix_init(&pattern_matrix,
501 g->gradientTransform[0], g->gradientTransform[1],
502 g->gradientTransform[2], g->gradientTransform[3],
503 g->gradientTransform[4], g->gradientTransform[5]);
504 } else {
505 cairo_matrix_init_identity (&pattern_matrix);
506 }
508 if (apply_bbox2user) {
509 // convert to userspace
510 cairo_matrix_t bbox2user;
511 cairo_matrix_init (&bbox2user, pbox->x1 - pbox->x0, 0, 0, pbox->y1 - pbox->y0, pbox->x0, pbox->y0);
512 cairo_matrix_multiply (&pattern_matrix, &bbox2user, &pattern_matrix);
513 }
514 cairo_matrix_invert(&pattern_matrix); // because Cairo expects a userspace->patternspace matrix
515 cairo_pattern_set_matrix(pattern, &pattern_matrix);
516 }
518 return pattern;
519 }
521 void
522 PrintCairoPDF::print_fill_style(cairo_t *cr, SPStyle const *const style, NRRect const *pbox)
523 {
524 g_return_if_fail( style->fill.type == SP_PAINT_TYPE_COLOR
525 || ( style->fill.type == SP_PAINT_TYPE_PAINTSERVER
526 && SP_IS_GRADIENT(SP_STYLE_FILL_SERVER(style)) ) );
528 if (style->fill.type == SP_PAINT_TYPE_COLOR) {
529 float rgb[3];
530 sp_color_get_rgb_floatv(&style->fill.value.color, rgb);
532 float alpha = 1.0;
533 alpha *= SP_SCALE24_TO_FLOAT(style->fill_opacity.value);
534 alpha *= _alpha_stack.back();
536 cairo_set_source_rgba(cr, rgb[0], rgb[1], rgb[2], alpha);
537 } else {
538 g_assert( style->fill.type == SP_PAINT_TYPE_PAINTSERVER
539 && SP_IS_GRADIENT(SP_STYLE_FILL_SERVER(style)) );
541 cairo_pattern_t *pattern = create_pattern_for_paint(SP_STYLE_FILL_SERVER(style), pbox, 1.0);
543 if (pattern) {
544 cairo_set_source(cr, pattern);
545 cairo_pattern_destroy(pattern);
546 }
547 }
548 }
550 unsigned int
551 PrintCairoPDF::fill(Inkscape::Extension::Print *mod, NRBPath const *bpath, NRMatrix const *ctm, SPStyle const *const style,
552 NRRect const *pbox, NRRect const *dbox, NRRect const *bbox)
553 {
554 if (!_stream) return 0; // XXX: fixme, returning -1 as unsigned.
555 if (_bitmap) return 0;
557 if ( style->fill.type == SP_PAINT_TYPE_COLOR
558 || ( style->fill.type == SP_PAINT_TYPE_PAINTSERVER
559 && SP_IS_GRADIENT(SP_STYLE_FILL_SERVER(style)) ) ) {
561 float alpha = 1.0;
562 alpha *= SP_SCALE24_TO_FLOAT(style->fill_opacity.value);
563 alpha *= _alpha_stack.back();
565 cairo_save(cr);
567 print_fill_style(cr, style, pbox);
568 print_bpath(cr, bpath->path);
569 if (style->fill_rule.value == SP_WIND_RULE_EVENODD) {
570 cairo_set_fill_rule(cr, CAIRO_FILL_RULE_EVEN_ODD);
571 } else {
572 cairo_set_fill_rule(cr, CAIRO_FILL_RULE_WINDING);
573 }
574 if (0 && alpha != 1.0 &&
575 style->fill.type != SP_PAINT_TYPE_COLOR) {
577 cairo_clip (cr);
578 cairo_paint_with_alpha (cr, alpha);
579 } else {
580 cairo_fill(cr);
581 }
583 cairo_restore(cr);
584 }
586 return 0;
587 }
589 void
590 PrintCairoPDF::print_stroke_style(cairo_t *cr, SPStyle const *style, NRRect const *pbox)
591 {
592 float alpha = 1.0;
593 alpha *= SP_SCALE24_TO_FLOAT(style->stroke_opacity.value);
594 alpha *= _alpha_stack.back();
596 if ( style->stroke.type == SP_PAINT_TYPE_COLOR ) {
597 float rgb[3];
598 sp_color_get_rgb_floatv(&style->stroke.value.color, rgb);
600 cairo_set_source_rgba(cr, rgb[0], rgb[1], rgb[2], alpha);
601 } else if ( style->stroke.type == SP_PAINT_TYPE_PAINTSERVER
602 && SP_IS_GRADIENT(SP_STYLE_STROKE_SERVER(style)) ) {
604 cairo_pattern_t *pattern = create_pattern_for_paint(SP_STYLE_STROKE_SERVER(style), pbox, alpha);
606 if (pattern) {
607 cairo_set_source(cr, pattern);
608 cairo_pattern_destroy(pattern);
609 }
610 }
612 if (style->stroke_dash.n_dash &&
613 style->stroke_dash.dash )
614 {
615 cairo_set_dash(cr, style->stroke_dash.dash, style->stroke_dash.n_dash, style->stroke_dash.offset);
616 } else {
617 cairo_set_dash(cr, NULL, 0, 0.0); // disable dashing
618 }
620 cairo_set_line_width(cr, style->stroke_width.computed);
622 // set line join type
623 cairo_line_join_t join = CAIRO_LINE_JOIN_MITER;
624 switch (style->stroke_linejoin.computed) {
625 case SP_STROKE_LINEJOIN_MITER:
626 join = CAIRO_LINE_JOIN_MITER;
627 break;
628 case SP_STROKE_LINEJOIN_ROUND:
629 join = CAIRO_LINE_JOIN_ROUND;
630 break;
631 case SP_STROKE_LINEJOIN_BEVEL:
632 join = CAIRO_LINE_JOIN_BEVEL;
633 break;
634 }
635 cairo_set_line_join(cr, join);
637 // set line cap type
638 cairo_line_cap_t cap = CAIRO_LINE_CAP_BUTT;
639 switch (style->stroke_linecap.computed) {
640 case SP_STROKE_LINECAP_BUTT:
641 cap = CAIRO_LINE_CAP_BUTT;
642 break;
643 case SP_STROKE_LINECAP_ROUND:
644 cap = CAIRO_LINE_CAP_ROUND;
645 break;
646 case SP_STROKE_LINECAP_SQUARE:
647 cap = CAIRO_LINE_CAP_SQUARE;
648 break;
649 }
650 cairo_set_line_cap(cr, cap);
651 cairo_set_miter_limit(cr, MAX(1, style->stroke_miterlimit.value));
652 }
654 unsigned int
655 PrintCairoPDF::stroke(Inkscape::Extension::Print *mod, NRBPath const *bpath, NRMatrix const *ctm, SPStyle const *style,
656 NRRect const *pbox, NRRect const *dbox, NRRect const *bbox)
657 {
658 if (!_stream) return 0; // XXX: fixme, returning -1 as unsigned.
659 if (_bitmap) return 0;
661 if ( style->stroke.type == SP_PAINT_TYPE_COLOR ||
662 ( style->stroke.type == SP_PAINT_TYPE_PAINTSERVER
663 && SP_IS_GRADIENT(SP_STYLE_STROKE_SERVER(style)) ) ) {
665 cairo_save(cr);
667 print_stroke_style(cr, style, pbox);
668 print_bpath(cr, bpath->path);
669 cairo_stroke(cr);
671 cairo_restore(cr);
672 }
674 return 0;
675 }
677 unsigned int
678 PrintCairoPDF::image(Inkscape::Extension::Print *mod, guchar *px, unsigned int w, unsigned int h, unsigned int rs,
679 NRMatrix const *transform, SPStyle const *style)
680 {
681 if (!_stream) return 0; // XXX: fixme, returning -1 as unsigned.
682 if (_bitmap) return 0;
684 guchar* px_rgba = (guchar*)g_malloc(4 * w * h);
685 if (!px_rgba) return 0;
687 float alpha = _alpha_stack.back();
689 // make a copy of the original pixbuf with premultiplied alpha
690 // if we pass the original pixbuf it will get messed up
691 for (unsigned i = 0; i < h; i++) {
692 for (unsigned j = 0; j < w; j++) {
693 guchar const *src = px + i * rs + j * 4;
694 guint32 *dst = (guint32 *)(px_rgba + i * rs + j * 4);
695 guchar r, g, b, alpha_dst;
697 // calculate opacity-modified alpha
698 alpha_dst = src[3];
699 if (alpha != 1.0)
700 alpha_dst = (guchar)ceil((float)alpha_dst * alpha);
702 // premul alpha (needed because this will be undone by cairo-pdf)
703 r = src[0]*alpha_dst/255;
704 g = src[1]*alpha_dst/255;
705 b = src[2]*alpha_dst/255;
707 *dst = (((alpha_dst) << 24) | (((r)) << 16) | (((g)) << 8) | (b));
708 }
709 }
711 cairo_surface_t *image_surface = cairo_image_surface_create_for_data(px_rgba, CAIRO_FORMAT_ARGB32, w, h, w * 4);
712 if (cairo_surface_status(image_surface)) {
713 g_printf("%s\n", cairo_status_to_string(cairo_surface_status(image_surface)));
714 return 0;
715 }
717 cairo_save(cr);
719 // scaling by width & height is not needed because it will be done by cairo-pdf
720 // we have to translate down by height also in order to eliminate the last translation done by sp_image_print
721 cairo_matrix_t matrix;
722 cairo_matrix_init(&matrix,
723 transform->c[0]/w, transform->c[1],
724 transform->c[2], -transform->c[3]/h,
725 transform->c[4], transform->c[5] + transform->c[3]);
726 cairo_transform(cr, &matrix);
728 cairo_pattern_t *pattern = cairo_pattern_create_for_surface(image_surface);
729 cairo_pattern_set_extend(pattern, CAIRO_EXTEND_NONE);
731 cairo_set_source(cr, pattern);
732 cairo_pattern_destroy(pattern);
734 // set clip region so that the pattern will not be repeated (bug in Cairo prior 1.2.1)
735 cairo_new_path(cr);
736 cairo_rectangle(cr, 0, 0, w, h);
737 cairo_clip(cr);
739 cairo_paint(cr);
741 cairo_restore(cr);
743 cairo_surface_destroy(image_surface);
744 g_free(px_rgba);
746 return 0;
747 }
749 #define GLYPH_ARRAY_SIZE 64
751 #ifndef RENDER_WITH_PANGO_CAIRO
753 NR::Point
754 PrintCairoPDF::draw_glyphs(cairo_t *cr, NR::Point p, PangoFont *font, PangoGlyphString *glyph_string,
755 bool vertical, bool stroke)
756 {
757 cairo_glyph_t glyph_array[GLYPH_ARRAY_SIZE];
758 cairo_glyph_t *glyphs = glyph_array;
759 if (glyph_string->num_glyphs > GLYPH_ARRAY_SIZE)
760 glyphs = (cairo_glyph_t*)g_malloc(sizeof(cairo_glyph_t) * glyph_string->num_glyphs);
762 PangoGlyphUnit x_offset = 0, y_offset = 0;
763 PangoGlyphInfo *info;
764 int num_invalid_glyphs = 0;
765 for (gint i = 0; i < glyph_string->num_glyphs; i++) {
766 info = &glyph_string->glyphs[i];
767 // skip glyphs which are PANGO_GLYPH_EMPTY (0x0FFFFFFF) or have
768 // the PANGO_GLYPH_UNKNOWN_FLAG (0x10000000) set
769 if (info->glyph == 0x0FFFFFFF || info->glyph & 0x10000000) {
770 num_invalid_glyphs++;
771 continue;
772 }
774 glyphs[i - num_invalid_glyphs].index = info->glyph;
775 glyphs[i - num_invalid_glyphs].x = p[NR::X] + (x_offset + info->geometry.x_offset)/PANGO_SCALE;
776 glyphs[i - num_invalid_glyphs].y = p[NR::Y] + (y_offset + info->geometry.y_offset)/PANGO_SCALE;
778 if (vertical) {
779 cairo_text_extents_t extents;
780 cairo_glyph_extents(cr, &glyphs[i - num_invalid_glyphs], 1, &extents);
781 y_offset += (PangoGlyphUnit)(extents.y_advance * PANGO_SCALE);
782 }
783 else
784 x_offset += info->geometry.width;
785 }
787 if (stroke)
788 cairo_glyph_path(cr, glyphs, glyph_string->num_glyphs - num_invalid_glyphs);
789 else
790 cairo_show_glyphs(cr, glyphs, glyph_string->num_glyphs - num_invalid_glyphs);
792 if (glyph_string->num_glyphs > GLYPH_ARRAY_SIZE)
793 g_free(glyphs);
795 return NR::Point(x_offset, y_offset);
796 }
797 #endif
801 unsigned int
802 PrintCairoPDF::text(Inkscape::Extension::Print *mod, char const *text, NR::Point p,
803 SPStyle const *const style)
804 {
805 bool dirty_pattern = false;
807 if (!_stream) return 0; // XXX: fixme, returning -1 as unsigned.
808 if (_bitmap) return 0;
810 cairo_save(cr);
812 // this needs to be there to encounter Cairo's userspace locking semantics for set_source
813 // otherwise gradients won't be shown correctly
814 cairo_translate(cr, -_last_tx, -_last_ty);
816 // create pango layout and context if needed
817 if (_layout == NULL) {
818 #ifdef RENDER_WITH_PANGO_CAIRO
819 //_context = pango_cairo_font_map_create_context(PANGO_CAIRO_FONT_MAP(pango_cairo_font_map_get_default()));
820 _layout = pango_cairo_create_layout(cr);
821 #else
822 _layout = pango_layout_new((font_factory::Default())->fontContext);
823 #endif
824 }
826 // create font instance from style and use it
827 font_instance *tf = (font_factory::Default())->Face(style->text->font_family.value, font_style_to_pos(*style));
828 if (tf == NULL) { // do something
829 g_printf("Warning: trouble getting font_instance\n");
830 tf = (font_factory::Default())->Face("sans", font_style_to_pos(*style));
831 }
832 PangoFontDescription *adjusted = pango_font_description_copy(tf->descr);
834 pango_font_description_set_absolute_size(adjusted, (gint)(style->font_size.computed * PANGO_SCALE));
835 pango_layout_set_font_description(_layout, adjusted);
836 pango_layout_set_text(_layout, text, -1);
838 pango_font_description_free(adjusted);
839 tf->Unref();
841 #ifdef RENDER_WITH_PANGO_CAIRO
842 pango_cairo_update_layout(cr, _layout);
843 #else
844 pango_layout_context_changed(_layout); // is this needed?
845 #endif
847 PangoLayoutLine *line = pango_layout_get_line(_layout, 0);
848 if (line == NULL)
849 return 0;
851 #ifndef RENDER_WITH_PANGO_CAIRO
852 // apply the selected font
853 double size;
854 PangoLayoutRun *first_run = (PangoLayoutRun *)line->runs->data;
855 PangoFcFont *fc_font = PANGO_FC_FONT(first_run->item->analysis.font);
856 FcPattern *fc_pattern = fc_font->font_pattern;
858 if ( style->writing_mode.set &&
859 (style->writing_mode.computed == SP_CSS_WRITING_MODE_TB_RL ||
860 style->writing_mode.computed == SP_CSS_WRITING_MODE_TB_LR) )
861 {
862 FcPatternDel(fc_pattern, FC_VERTICAL_LAYOUT);
863 FcPatternAddBool(fc_pattern, FC_VERTICAL_LAYOUT, FcTrue);
864 dirty_pattern = true;
865 }
867 cairo_font_face_t *font_face = cairo_ft_font_face_create_for_pattern(fc_pattern);
868 cairo_set_font_face(cr, font_face);
870 if (FcPatternGetDouble(fc_pattern, FC_PIXEL_SIZE, 0, &size) != FcResultMatch)
871 size = 12.0;
873 // adjust size and horizontal flip
874 cairo_matrix_t matrix;
875 cairo_get_font_matrix(cr, &matrix);
876 matrix.xx = size;
877 matrix.yy = -matrix.xx;
878 cairo_set_font_matrix(cr, &matrix);
879 #endif
881 if ( style->fill.type == SP_PAINT_TYPE_COLOR
882 || ( style->fill.type == SP_PAINT_TYPE_PAINTSERVER
883 && SP_IS_GRADIENT(SP_STYLE_FILL_SERVER(style)) ) )
884 {
885 // set fill style
886 print_fill_style(cr, style, NULL);
888 #ifndef RENDER_WITH_PANGO_CAIRO
889 NR::Point cursor(_last_tx, _last_ty);
890 for (GSList *tmpList = line->runs; tmpList && tmpList->data; tmpList = tmpList->next) {
891 PangoLayoutRun *run = (PangoLayoutRun *)tmpList->data;
892 cursor += draw_glyphs(cr, cursor, run->item->analysis.font, run->glyphs, dirty_pattern, false) / PANGO_SCALE;
893 }
894 #else
895 cairo_new_path(cr);
896 cairo_move_to(cr, _last_tx, _last_ty);
897 pango_cairo_show_layout_line(cr, line);
898 #endif
899 }
901 if (style->stroke.type == SP_PAINT_TYPE_COLOR
902 || ( style->stroke.type == SP_PAINT_TYPE_PAINTSERVER
903 && SP_IS_GRADIENT(SP_STYLE_STROKE_SERVER(style)) ) )
904 {
905 // set stroke style
906 print_stroke_style(cr, style, NULL);
908 // paint stroke
909 #ifndef RENDER_WITH_PANGO_CAIRO
910 NR::Point cursor(_last_tx, _last_ty);
911 for (GSList *tmpList = line->runs; tmpList && tmpList->data; tmpList = tmpList->next) {
912 PangoLayoutRun *run = (PangoLayoutRun *)tmpList->data;
913 cursor += draw_glyphs(cr, cursor, run->item->analysis.font, run->glyphs, dirty_pattern, true) / PANGO_SCALE;
914 }
915 #else
916 cairo_new_path(cr);
917 cairo_move_to(cr, _last_tx, _last_ty);
918 pango_cairo_layout_line_path(cr, line);
919 #endif
920 cairo_stroke(cr);
921 }
924 cairo_restore(cr);
926 #ifndef RENDER_WITH_PANGO_CAIRO
927 cairo_font_face_destroy(font_face);
929 if (dirty_pattern) {
930 FcPatternDel(fc_pattern, FC_VERTICAL_LAYOUT);
931 FcPatternAddBool(fc_pattern, FC_VERTICAL_LAYOUT, FcFalse);
932 }
933 #endif
934 tf->Unref();
936 return 0;
937 }
939 /* Helper functions */
941 void
942 PrintCairoPDF::print_bpath(cairo_t *cr, NArtBpath const *bp)
943 {
944 cairo_new_path(cr);
945 bool closed = false;
946 while (bp->code != NR_END) {
947 switch (bp->code) {
948 case NR_MOVETO:
949 if (closed) {
950 cairo_close_path(cr);
951 }
952 closed = true;
953 cairo_move_to(cr, bp->x3, bp->y3);
954 break;
955 case NR_MOVETO_OPEN:
956 if (closed) {
957 cairo_close_path(cr);
958 }
959 closed = false;
960 cairo_move_to(cr, bp->x3, bp->y3);
961 break;
962 case NR_LINETO:
963 cairo_line_to(cr, bp->x3, bp->y3);
964 break;
965 case NR_CURVETO:
966 cairo_curve_to(cr, bp->x1, bp->y1, bp->x2, bp->y2, bp->x3, bp->y3);
967 break;
968 default:
969 break;
970 }
971 bp += 1;
972 }
973 if (closed) {
974 cairo_close_path(cr);
975 }
976 }
978 static void
979 _concat_transform(cairo_t *cr, double xx, double yx, double xy, double yy, double x0, double y0)
980 {
981 cairo_matrix_t matrix;
983 cairo_matrix_init(&matrix, xx, yx, xy, yy, x0, y0);
984 cairo_transform(cr, &matrix);
985 }
987 static cairo_status_t
988 _write_callback(void *closure, const unsigned char *data, unsigned int length)
989 {
990 size_t written;
991 FILE *file = (FILE*)closure;
993 written = fwrite (data, 1, length, file);
995 if (written == length)
996 return CAIRO_STATUS_SUCCESS;
997 else
998 return CAIRO_STATUS_WRITE_ERROR;
999 }
1001 bool
1002 PrintCairoPDF::textToPath(Inkscape::Extension::Print * ext)
1003 {
1004 return ext->get_param_bool("textToPath");
1005 }
1007 #include "clear-n_.h"
1009 void
1010 PrintCairoPDF::init(void)
1011 {
1012 /* PDF out */
1013 (void) Inkscape::Extension::build_from_mem(
1014 "<inkscape-extension>\n"
1015 "<name>" N_("PDF Print") "</name>\n"
1016 "<id>" SP_MODULE_KEY_PRINT_CAIRO_PDF "</id>\n"
1017 "<param name=\"bitmap\" type=\"boolean\">FALSE</param>\n"
1018 "<param name=\"resolution\" type=\"string\">72</param>\n"
1019 "<param name=\"destination\" type=\"string\">| lp</param>\n"
1020 "<param name=\"pageBoundingBox\" type=\"boolean\">TRUE</param>\n"
1021 "<param name=\"textToPath\" type=\"boolean\">TRUE</param>\n"
1022 "<print/>\n"
1023 "</inkscape-extension>", new PrintCairoPDF());
1024 }
1027 } /* namespace Internal */
1028 } /* namespace Extension */
1029 } /* namespace Inkscape */
1031 /* End of GNU GPL code */
1034 /*
1035 Local Variables:
1036 mode:c++
1037 c-file-style:"stroustrup"
1038 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1039 indent-tabs-mode:nil
1040 fill-column:99
1041 End:
1042 */
1043 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :