1 /** \file
2 * Native PDF import using libpoppler.
3 *
4 * Authors:
5 * miklos erdelyi
6 *
7 * Copyright (C) 2007 Authors
8 *
9 * Released under GNU GPL, read the file 'COPYING' for more information
10 *
11 */
13 #ifdef HAVE_CONFIG_H
14 # include <config.h>
15 #endif
17 #ifdef HAVE_POPPLER
19 #include "svg-builder.h"
20 #include "pdf-parser.h"
22 #include <png.h>
24 #include "document-private.h"
25 #include "xml/document.h"
26 #include "xml/node.h"
27 #include "xml/repr.h"
28 #include "svg/svg.h"
29 #include "svg/path-string.h"
30 #include "svg/css-ostringstream.h"
31 #include "svg/svg-color.h"
32 #include "color.h"
33 #include "unit-constants.h"
34 #include "io/stringstream.h"
35 #include "io/base64stream.h"
36 #include "libnr/nr-matrix-ops.h"
37 #include "libnr/nr-macros.h"
38 #include "libnrtype/font-instance.h"
40 #include "Function.h"
41 #include "GfxState.h"
42 #include "GfxFont.h"
43 #include "Stream.h"
44 #include "UnicodeMap.h"
45 #include "GlobalParams.h"
47 namespace Inkscape {
48 namespace Extension {
49 namespace Internal {
51 //#define IFTRACE(_code) _code
52 #define IFTRACE(_code)
54 #define TRACE(_args) IFTRACE(g_print _args)
57 /**
58 * \class SvgBuilder
59 *
60 */
62 SvgBuilder::SvgBuilder() {
63 _in_text_object = false;
64 _need_font_update = true;
65 _invalidated_style = true;
66 _font_style = NULL;
67 _current_font = NULL;
68 _current_state = NULL;
69 }
71 SvgBuilder::SvgBuilder(SPDocument *document) {
72 _doc = document;
73 _xml_doc = sp_document_repr_doc(_doc);
74 _container = _root = _doc->rroot;
75 SvgBuilder();
76 }
78 SvgBuilder::SvgBuilder(SvgBuilder *parent, Inkscape::XML::Node *root) {
79 _doc = parent->_doc;
80 _xml_doc = parent->_xml_doc;
81 _container = this->_root = root;
82 SvgBuilder();
83 }
85 SvgBuilder::~SvgBuilder() {
86 }
88 void SvgBuilder::setDocumentSize(double width, double height) {
89 sp_repr_set_svg_double(_root, "width", width);
90 sp_repr_set_svg_double(_root, "height", height);
91 this->_width = width;
92 this->_height = height;
93 }
95 void SvgBuilder::saveState() {
96 _group_depth.push_back(0);
97 pushGroup();
98 }
100 void SvgBuilder::restoreState() {
101 while (_group_depth.back() > 0) {
102 popGroup();
103 }
104 _group_depth.pop_back();
105 }
107 Inkscape::XML::Node *SvgBuilder::pushGroup() {
108 Inkscape::XML::Node *node = _xml_doc->createElement("svg:g");
109 _container->appendChild(node);
110 _container = node;
111 Inkscape::GC::release(node);
112 _group_depth.back()++;
114 return _container;
115 }
117 Inkscape::XML::Node *SvgBuilder::popGroup() {
118 if (_container != _root) { // Pop if the current container isn't root
119 _container = _container->parent();
120 _group_depth[_group_depth.size()-1] = --_group_depth.back();
121 }
123 return _container;
124 }
126 Inkscape::XML::Node *SvgBuilder::getContainer() {
127 return _container;
128 }
130 static gchar *svgConvertRGBToText(double r, double g, double b) {
131 static gchar tmp[1023] = {0};
132 snprintf(tmp, 1023,
133 "#%02x%02x%02x",
134 CLAMP(SP_COLOR_F_TO_U(r), 0, 255),
135 CLAMP(SP_COLOR_F_TO_U(g), 0, 255),
136 CLAMP(SP_COLOR_F_TO_U(b), 0, 255));
137 return (gchar *)&tmp;
138 }
140 static gchar *svgConvertGfxRGB(GfxRGB *color) {
141 double r = color->r / 65535.0;
142 double g = color->g / 65535.0;
143 double b = color->b / 65535.0;
144 return svgConvertRGBToText(r, g, b);
145 }
147 static void svgSetTransform(Inkscape::XML::Node *node, double c0, double c1,
148 double c2, double c3, double c4, double c5) {
149 NR::Matrix matrix(c0, c1, c2, c3, c4, c5);
150 gchar *transform_text = sp_svg_transform_write(matrix);
151 node->setAttribute("transform", transform_text);
152 g_free(transform_text);
153 }
155 static void svgSetTransform(Inkscape::XML::Node *node, double *transform) {
156 svgSetTransform(node, transform[0], transform[1], transform[2], transform[3],
157 transform[4], transform[5]);
158 }
160 /**
161 * \brief Generates a SVG path string from poppler's data structure
162 */
163 static gchar *svgInterpretPath(GfxPath *path) {
164 GfxSubpath *subpath;
165 Inkscape::SVG::PathString pathString;
166 int i, j;
167 for ( i = 0 ; i < path->getNumSubpaths() ; ++i ) {
168 subpath = path->getSubpath(i);
169 if (subpath->getNumPoints() > 0) {
170 pathString.moveTo(subpath->getX(0), subpath->getY(0));
171 j = 1;
172 while (j < subpath->getNumPoints()) {
173 if (subpath->getCurve(j)) {
174 pathString.curveTo(subpath->getX(j), subpath->getY(j),
175 subpath->getX(j+1), subpath->getY(j+1),
176 subpath->getX(j+2), subpath->getY(j+2));
178 j += 3;
179 } else {
180 pathString.lineTo(subpath->getX(j), subpath->getY(j));
181 ++j;
182 }
183 }
184 if (subpath->isClosed()) {
185 pathString.closePath();
186 }
187 }
188 }
190 return g_strdup(pathString.c_str());
191 }
193 /**
194 * \brief Sets stroke style from poppler's GfxState data structure
195 * Uses the given SPCSSAttr for storing the style properties
196 */
197 void SvgBuilder::_setStrokeStyle(SPCSSAttr *css, GfxState *state) {
199 // Check line width
200 if ( state->getLineWidth() <= 0.0 ) {
201 // Ignore stroke
202 sp_repr_css_set_property(css, "stroke", "none");
203 return;
204 }
206 // Stroke color/pattern
207 if ( state->getStrokeColorSpace()->getMode() == csPattern ) {
208 gchar *urltext = _createPattern(state->getStrokePattern());
209 sp_repr_css_set_property(css, "stroke", urltext);
210 if (urltext) {
211 g_free(urltext);
212 }
213 } else {
214 GfxRGB stroke_color;
215 state->getStrokeRGB(&stroke_color);
216 sp_repr_css_set_property(css, "stroke", svgConvertGfxRGB(&stroke_color));
217 }
219 // Opacity
220 Inkscape::CSSOStringStream os_opacity;
221 os_opacity << state->getStrokeOpacity();
222 sp_repr_css_set_property(css, "stroke-opacity", os_opacity.str().c_str());
224 // Line width
225 Inkscape::CSSOStringStream os_width;
226 os_width << state->getLineWidth();
227 sp_repr_css_set_property(css, "stroke-width", os_width.str().c_str());
229 // Line cap
230 switch (state->getLineCap()) {
231 case 0:
232 sp_repr_css_set_property(css, "stroke-linecap", "butt");
233 break;
234 case 1:
235 sp_repr_css_set_property(css, "stroke-linecap", "round");
236 break;
237 case 2:
238 sp_repr_css_set_property(css, "stroke-linecap", "square");
239 break;
240 }
242 // Line join
243 switch (state->getLineJoin()) {
244 case 0:
245 sp_repr_css_set_property(css, "stroke-linejoin", "miter");
246 break;
247 case 1:
248 sp_repr_css_set_property(css, "stroke-linejoin", "round");
249 break;
250 case 2:
251 sp_repr_css_set_property(css, "stroke-linejoin", "bevel");
252 break;
253 }
255 // Miterlimit
256 Inkscape::CSSOStringStream os_ml;
257 os_ml << state->getMiterLimit();
258 sp_repr_css_set_property(css, "stroke-miterlimit", os_ml.str().c_str());
260 // Line dash
261 double *dash_pattern;
262 int dash_length;
263 double dash_start;
264 state->getLineDash(&dash_pattern, &dash_length, &dash_start);
265 if ( dash_length > 0 ) {
266 Inkscape::CSSOStringStream os_array;
267 for ( int i = 0 ; i < dash_length ; i++ ) {
268 os_array << dash_pattern[i];
269 if (i < (dash_length - 1)) {
270 os_array << ",";
271 }
272 }
273 sp_repr_css_set_property(css, "stroke-dasharray", os_array.str().c_str());
275 Inkscape::CSSOStringStream os_offset;
276 os_offset << dash_start;
277 sp_repr_css_set_property(css, "stroke-dashoffset", os_offset.str().c_str());
278 } else {
279 sp_repr_css_set_property(css, "stroke-dasharray", "none");
280 sp_repr_css_set_property(css, "stroke-dashoffset", NULL);
281 }
282 }
284 /**
285 * \brief Sets fill style from poppler's GfxState data structure
286 * Uses the given SPCSSAttr for storing the style properties.
287 */
288 void SvgBuilder::_setFillStyle(SPCSSAttr *css, GfxState *state, bool even_odd) {
290 // Fill color/pattern
291 if ( state->getFillColorSpace()->getMode() == csPattern ) {
292 gchar *urltext = _createPattern(state->getFillPattern());
293 sp_repr_css_set_property(css, "fill", urltext);
294 if (urltext) {
295 g_free(urltext);
296 }
297 } else {
298 GfxRGB fill_color;
299 state->getFillRGB(&fill_color);
300 sp_repr_css_set_property(css, "fill", svgConvertGfxRGB(&fill_color));
301 }
303 // Opacity
304 Inkscape::CSSOStringStream os_opacity;
305 os_opacity << state->getFillOpacity();
306 sp_repr_css_set_property(css, "fill-opacity", os_opacity.str().c_str());
308 // Fill rule
309 sp_repr_css_set_property(css, "fill-rule", even_odd ? "evenodd" : "nonzero");
310 }
312 /**
313 * \brief Sets style properties from poppler's GfxState data structure
314 * \return SPCSSAttr with all the relevant properties set
315 */
316 SPCSSAttr *SvgBuilder::_setStyle(GfxState *state, bool fill, bool stroke, bool even_odd) {
317 SPCSSAttr *css = sp_repr_css_attr_new();
318 if (fill) {
319 _setFillStyle(css, state, even_odd);
320 } else {
321 sp_repr_css_set_property(css, "fill", "none");
322 }
324 if (stroke) {
325 _setStrokeStyle(css, state);
326 } else {
327 sp_repr_css_set_property(css, "stroke", "none");
328 }
330 return css;
331 }
333 /**
334 * \brief Emits the current path in poppler's GfxState data structure
335 * Can be used to do filling and stroking at once.
336 *
337 * \param fill whether the path should be filled
338 * \param stroke whether the path should be stroked
339 * \param even_odd whether the even-odd rule should be used when filling the path
340 */
341 void SvgBuilder::addPath(GfxState *state, bool fill, bool stroke, bool even_odd) {
342 Inkscape::XML::Node *path = _xml_doc->createElement("svg:path");
343 gchar *pathtext = svgInterpretPath(state->getPath());
344 path->setAttribute("d", pathtext);
345 g_free(pathtext);
347 // Set style
348 SPCSSAttr *css = _setStyle(state, fill, stroke, even_odd);
349 sp_repr_css_change(path, css, "style");
350 sp_repr_css_attr_unref(css);
352 _container->appendChild(path);
353 Inkscape::GC::release(path);
354 }
356 /**
357 * \brief Clips to the current path set in GfxState
358 * \param state poppler's data structure
359 * \param even_odd whether the even-odd rule should be applied
360 */
361 void SvgBuilder::clip(GfxState *state, bool even_odd) {
362 pushGroup();
363 setClipPath(state, even_odd);
364 }
366 void SvgBuilder::setClipPath(GfxState *state, bool even_odd) {
367 // Create the clipPath repr
368 Inkscape::XML::Node *clip_path = _xml_doc->createElement("svg:clipPath");
369 clip_path->setAttribute("clipPathUnits", "userSpaceOnUse");
370 // Create the path
371 Inkscape::XML::Node *path = _xml_doc->createElement("svg:path");
372 gchar *pathtext = svgInterpretPath(state->getPath());
373 path->setAttribute("d", pathtext);
374 g_free(pathtext);
375 clip_path->appendChild(path);
376 Inkscape::GC::release(path);
377 // Append clipPath to defs and get id
378 SP_OBJECT_REPR (SP_DOCUMENT_DEFS (_doc))->appendChild(clip_path);
379 gchar *urltext = g_strdup_printf ("url(#%s)", clip_path->attribute("id"));
380 Inkscape::GC::release(clip_path);
381 _container->setAttribute("clip-path", urltext);
382 g_free(urltext);
383 }
385 /**
386 * \brief Fills the given array with the current container's transform, if set
387 * \param transform array of doubles to be filled
388 * \return true on success; false on invalid transformation
389 */
390 bool SvgBuilder::getTransform(double *transform) {
391 NR::Matrix svd;
392 gchar const *tr = _container->attribute("transform");
393 bool valid = sp_svg_transform_read(tr, &svd);
394 if (valid) {
395 for ( int i = 0 ; i < 6 ; i++ ) {
396 transform[i] = svd[i];
397 }
398 return true;
399 } else {
400 return false;
401 }
402 }
404 /**
405 * \brief Sets the transformation matrix of the current container
406 */
407 void SvgBuilder::setTransform(double c0, double c1, double c2, double c3,
408 double c4, double c5) {
410 TRACE(("setTransform: %f %f %f %f %f %f\n", c0, c1, c2, c3, c4, c5));
411 svgSetTransform(_container, c0, c1, c2, c3, c4, c5);
412 }
414 void SvgBuilder::setTransform(double *transform) {
415 setTransform(transform[0], transform[1], transform[2], transform[3],
416 transform[4], transform[5]);
417 }
419 /**
420 * \brief Checks whether the given pattern type can be represented in SVG
421 * Used by PdfParser to decide when to do fallback operations.
422 */
423 bool SvgBuilder::isPatternTypeSupported(GfxPattern *pattern) {
424 if ( pattern != NULL ) {
425 if ( pattern->getType() == 2 ) { // shading pattern
426 GfxShading *shading = ((GfxShadingPattern *)pattern)->getShading();
427 int shadingType = shading->getType();
428 if ( shadingType == 2 || // axial shading
429 shadingType == 3 ) { // radial shading
430 return true;
431 }
432 return false;
433 } else if ( pattern->getType() == 1 ) { // tiling pattern
434 return true;
435 }
436 }
438 return false;
439 }
441 /**
442 * \brief Creates a pattern from poppler's data structure
443 * Handles linear and radial gradients. Creates a new PdfParser and uses it to
444 * build a tiling pattern.
445 * \return an url pointing to the created pattern
446 */
447 gchar *SvgBuilder::_createPattern(GfxPattern *pattern) {
448 gchar *id = NULL;
449 if ( pattern != NULL ) {
450 if ( pattern->getType() == 2 ) { // Shading pattern
451 id = _createGradient((GfxShadingPattern*)pattern);
452 } else if ( pattern->getType() == 1 ) { // Tiling pattern
453 id = _createTilingPattern((GfxTilingPattern*)pattern);
454 }
455 } else {
456 return NULL;
457 }
458 gchar *urltext = g_strdup_printf ("url(#%s)", id);
459 g_free(id);
460 return urltext;
461 }
463 gchar *SvgBuilder::_createTilingPattern(GfxTilingPattern *tiling_pattern) {
464 return NULL;
465 }
467 /**
468 * \brief Creates a linear or radial gradient from poppler's data structure
469 * \return id of the created object
470 */
471 gchar *SvgBuilder::_createGradient(GfxShadingPattern *shading_pattern) {
472 GfxShading *shading = shading_pattern->getShading();
473 Inkscape::XML::Node *gradient;
474 Function *func;
475 int num_funcs;
476 bool extend0, extend1;
478 if ( shading->getType() == 2 ) { // Axial shading
479 gradient = _xml_doc->createElement("svg:linearGradient");
480 GfxAxialShading *axial_shading = (GfxAxialShading*)shading;
481 double x1, y1, x2, y2;
482 axial_shading->getCoords(&x1, &y1, &x2, &y2);
483 sp_repr_set_svg_double(gradient, "x1", x1);
484 sp_repr_set_svg_double(gradient, "y1", y1);
485 sp_repr_set_svg_double(gradient, "x2", x2);
486 sp_repr_set_svg_double(gradient, "y2", y2);
487 extend0 = axial_shading->getExtend0();
488 extend1 = axial_shading->getExtend1();
489 num_funcs = axial_shading->getNFuncs();
490 func = axial_shading->getFunc(0);
491 } else if (shading->getType() == 3) { // Radial shading
492 gradient = _xml_doc->createElement("svg:radialGradient");
493 GfxRadialShading *radial_shading = (GfxRadialShading*)shading;
494 double x1, y1, r1, x2, y2, r2;
495 radial_shading->getCoords(&x1, &y1, &r1, &x2, &y2, &r2);
496 // FIXME: the inner circle's radius is ignored here
497 sp_repr_set_svg_double(gradient, "fx", x1);
498 sp_repr_set_svg_double(gradient, "fy", y1);
499 sp_repr_set_svg_double(gradient, "cx", x2);
500 sp_repr_set_svg_double(gradient, "cy", y2);
501 sp_repr_set_svg_double(gradient, "r", r2);
502 extend0 = radial_shading->getExtend0();
503 extend1 = radial_shading->getExtend1();
504 num_funcs = radial_shading->getNFuncs();
505 func = radial_shading->getFunc(0);
506 } else { // Unsupported shading type
507 return NULL;
508 }
509 gradient->setAttribute("gradientUnits", "userSpaceOnUse");
510 // Flip the gradient transform around the y axis
511 double *p2u = shading_pattern->getMatrix();
512 NR::Matrix pat_matrix(p2u[0], p2u[1], p2u[2], p2u[3], p2u[4], p2u[5]);
513 NR::Matrix flip(1.0, 0.0, 0.0, -1.0, 0.0, _height * PT_PER_PX);
514 pat_matrix *= flip;
515 gchar *transform_text = sp_svg_transform_write(pat_matrix);
516 gradient->setAttribute("gradientTransform", transform_text);
517 g_free(transform_text);
519 if ( extend0 && extend1 ) {
520 gradient->setAttribute("spreadMethod", "pad");
521 }
523 if ( num_funcs > 1 || !_addStopsToGradient(gradient, func, 1.0) ) {
524 Inkscape::GC::release(gradient);
525 return NULL;
526 }
528 Inkscape::XML::Node *defs = SP_OBJECT_REPR (SP_DOCUMENT_DEFS (_doc));
529 defs->appendChild(gradient);
530 gchar *id = g_strdup(gradient->attribute("id"));
531 Inkscape::GC::release(gradient);
533 return id;
534 }
536 #define EPSILON 0.0001
537 bool SvgBuilder::_addSamplesToGradient(Inkscape::XML::Node *gradient,
538 SampledFunction *func, double offset0,
539 double offset1, double opacity) {
541 // Check whether this sampled function can be converted to color stops
542 int sample_size = func->getSampleSize(0);
543 if ( sample_size != 2 )
544 return false;
545 int num_comps = func->getOutputSize();
546 if ( num_comps != 3 )
547 return false;
549 double *samples = func->getSamples();
550 unsigned stop_count = gradient->childCount();
551 bool is_continuation = false;
552 // Check if this sampled function is the continuation of the previous one
553 if ( stop_count > 0 ) {
554 // Get previous stop
555 Inkscape::XML::Node *prev_stop = gradient->nthChild(stop_count-1);
556 // Read its properties
557 double prev_offset;
558 sp_repr_get_double(prev_stop, "offset", &prev_offset);
559 SPCSSAttr *css = sp_repr_css_attr(prev_stop, "style");
560 guint32 prev_stop_color = sp_svg_read_color(sp_repr_css_property(css, "stop-color", NULL), 0);
561 sp_repr_css_attr_unref(css);
562 // Convert colors
563 double r = SP_RGBA32_R_F (prev_stop_color);
564 double g = SP_RGBA32_G_F (prev_stop_color);
565 double b = SP_RGBA32_B_F (prev_stop_color);
566 if ( fabs(prev_offset - offset0) < EPSILON &&
567 fabs(samples[0] - r) < EPSILON &&
568 fabs(samples[1] - g) < EPSILON &&
569 fabs(samples[2] - b) < EPSILON ) {
571 is_continuation = true;
572 }
573 }
575 int i = is_continuation ? num_comps : 0;
576 while (i < sample_size*num_comps) {
577 Inkscape::XML::Node *stop = _xml_doc->createElement("svg:stop");
578 SPCSSAttr *css = sp_repr_css_attr_new();
579 Inkscape::CSSOStringStream os_opacity;
580 os_opacity << opacity;
581 sp_repr_css_set_property(css, "stop-opacity", os_opacity.str().c_str());
582 gchar c[64];
583 sp_svg_write_color (c, 64, SP_RGBA32_F_COMPOSE (samples[i], samples[i+1], samples[i+2], 1.0));
584 sp_repr_css_set_property(css, "stop-color", c);
585 sp_repr_css_change(stop, css, "style");
586 sp_repr_css_attr_unref(css);
587 sp_repr_set_css_double(stop, "offset", ( i < num_comps ) ? offset0 : offset1);
589 gradient->appendChild(stop);
590 Inkscape::GC::release(stop);
591 i += num_comps;
592 }
594 return true;
595 }
597 bool SvgBuilder::_addStopsToGradient(Inkscape::XML::Node *gradient, Function *func,
598 double opacity) {
600 int type = func->getType();
601 if ( type == 0 ) { // Sampled
602 SampledFunction *sampledFunc = (SampledFunction*)func;
603 _addSamplesToGradient(gradient, sampledFunc, 0.0, 1.0, opacity);
604 } else if ( type == 3 ) { // Stitching
605 StitchingFunction *stitchingFunc = (StitchingFunction*)func;
606 double *bounds = stitchingFunc->getBounds();
607 int num_funcs = stitchingFunc->getNumFuncs();
608 // Add samples from all the stitched functions
609 for ( int i = 0 ; i < num_funcs ; i++ ) {
610 Function *func = stitchingFunc->getFunc(i);
611 if ( func->getType() != 0 ) // Only sampled functions are supported
612 continue;
614 SampledFunction *sampledFunc = (SampledFunction*)func;
615 _addSamplesToGradient(gradient, sampledFunc, bounds[i],
616 bounds[i+1], opacity);
617 }
618 } else { // Unsupported function type
619 return false;
620 }
622 return true;
623 }
625 /**
626 * \brief Sets _invalidated_style to true to indicate that styles have to be updated
627 * Used for text output when glyphs are buffered till a font change
628 */
629 void SvgBuilder::updateStyle(GfxState *state) {
630 if (_in_text_object) {
631 _invalidated_style = true;
632 _current_state = state;
633 }
634 }
636 /**
637 * \brief Updates _font_style according to the font set in parameter state
638 */
639 void SvgBuilder::updateFont(GfxState *state) {
641 TRACE(("updateFont()\n"));
642 _need_font_update = false;
643 // Flush buffered text before resetting matrices and font style
644 _flushText();
646 if (_font_style) {
647 //sp_repr_css_attr_unref(_font_style);
648 }
649 _font_style = sp_repr_css_attr_new();
650 GfxFont *font = state->getFont();
651 // Store original name
652 if (font->getOrigName()) {
653 _font_specification = font->getOrigName()->getCString();
654 } else {
655 _font_specification = font->getName()->getCString();
656 }
658 // Prune the font name to get the correct font family name
659 // In a PDF font names can look like this: IONIPB+MetaPlusBold-Italic
660 char *font_family = NULL;
661 char *font_style = NULL;
662 char *plus_sign = strstr(_font_specification, "+");
663 if (plus_sign) {
664 font_family = g_strdup(plus_sign + 1);
665 _font_specification = plus_sign + 1;
666 } else {
667 font_family = g_strdup(_font_specification);
668 }
669 char *minus_sign = g_strrstr(font_family, "-");
670 if (minus_sign) {
671 font_style = minus_sign + 1;
672 minus_sign[0] = 0;
673 }
675 // Font family
676 if (font->getFamily()) {
677 const gchar *family = font->getFamily()->getCString();
678 sp_repr_css_set_property(_font_style, "font-family", font->getFamily()->getCString());
679 } else {
680 sp_repr_css_set_property(_font_style, "font-family", font_family);
681 }
682 g_free(font_family);
684 // Font style
685 if (font->isItalic()) {
686 sp_repr_css_set_property(_font_style, "font-style", "italic");
687 }
689 // Font variant -- default 'normal' value
690 sp_repr_css_set_property(_font_style, "font-variant", "normal");
692 // Font weight
693 GfxFont::Weight font_weight = font->getWeight();
694 if ( font_weight != GfxFont::WeightNotDefined ) {
695 if ( font_weight == GfxFont::W400 ) {
696 sp_repr_css_set_property(_font_style, "font-weight", "normal");
697 } else if ( font_weight == GfxFont::W700 ) {
698 sp_repr_css_set_property(_font_style, "font-weight", "bold");
699 } else {
700 gchar weight_num[4] = "100";
701 weight_num[0] = (gchar)( '1' + (font_weight - GfxFont::W100) );
702 sp_repr_css_set_property(_font_style, "font-weight", (gchar *)&weight_num);
703 }
704 }
706 // Font stretch
707 GfxFont::Stretch font_stretch = font->getStretch();
708 gchar *stretch_value = NULL;
709 switch (font_stretch) {
710 case GfxFont::UltraCondensed:
711 stretch_value = "ultra-condensed";
712 break;
713 case GfxFont::ExtraCondensed:
714 stretch_value = "extra-condensed";
715 break;
716 case GfxFont::Condensed:
717 stretch_value = "condensed";
718 break;
719 case GfxFont::SemiCondensed:
720 stretch_value = "semi-condensed";
721 break;
722 case GfxFont::Normal:
723 stretch_value = "normal";
724 break;
725 case GfxFont::SemiExpanded:
726 stretch_value = "semi-expanded";
727 break;
728 case GfxFont::Expanded:
729 stretch_value = "expanded";
730 break;
731 case GfxFont::ExtraExpanded:
732 stretch_value = "extra-expanded";
733 break;
734 case GfxFont::UltraExpanded:
735 stretch_value = "ultra-expanded";
736 break;
737 default:
738 break;
739 }
740 if ( stretch_value != NULL ) {
741 sp_repr_css_set_property(_font_style, "font-stretch", stretch_value);
742 }
744 // Font size
745 Inkscape::CSSOStringStream os_font_size;
746 double *text_matrix = state->getTextMat();
747 double font_size = sqrt( text_matrix[0] * text_matrix[3] - text_matrix[1] * text_matrix[2] );
748 font_size *= state->getFontSize() * state->getHorizScaling();
749 os_font_size << font_size;
750 sp_repr_css_set_property(_font_style, "font-size", os_font_size.str().c_str());
752 // Writing mode
753 if ( font->getWMode() == 0 ) {
754 sp_repr_css_set_property(_font_style, "writing-mode", "lr");
755 } else {
756 sp_repr_css_set_property(_font_style, "writing-mode", "tb");
757 }
759 // Calculate new text matrix
760 double *font_matrix = font->getFontMatrix();
761 NR::Matrix nr_font_matrix(font_matrix[0], font_matrix[1], font_matrix[2],
762 font_matrix[3], font_matrix[4], font_matrix[5]);
763 NR::Matrix new_text_matrix(text_matrix[0], text_matrix[1],
764 -text_matrix[2], -text_matrix[3],
765 0.0, 0.0);
766 new_text_matrix *= NR::scale( 1.0 / font_size, 1.0 / font_size );
767 _text_matrix = nr_font_matrix * new_text_matrix;
769 _current_font = font;
770 }
772 /**
773 * \brief Writes the buffered characters to the SVG document
774 */
775 void SvgBuilder::_flushText() {
776 // Ignore empty strings
777 if ( _glyphs.size() < 1 ) {
778 _glyphs.clear();
779 return;
780 }
781 const SvgGlyph& first_glyph = _glyphs[0];
782 int render_mode = first_glyph.render_mode;
783 // Ignore invisible characters
784 if ( render_mode == 3 ) {
785 _glyphs.clear();
786 return;
787 }
789 Inkscape::XML::Node *text_node = _xml_doc->createElement("svg:text");
790 // Set current text position
791 sp_repr_set_svg_double(text_node, "x", first_glyph.transformed_position[0]);
792 sp_repr_set_svg_double(text_node, "y", first_glyph.transformed_position[1]);
793 // Set style
794 sp_repr_css_change(text_node, first_glyph.style, "style");
795 text_node->setAttribute("inkscape:font-specification", _font_specification);
796 // Set text matrix
797 gchar *transform = sp_svg_transform_write(_text_matrix);
798 text_node->setAttribute("transform", transform);
799 g_free(transform);
801 bool new_tspan = true;
802 Inkscape::XML::Node *tspan_node = NULL;
803 Glib::ustring x_coords;
804 Glib::ustring y_coords;
805 Glib::ustring text_buffer;
806 bool is_vertical = !strcmp(sp_repr_css_property(_font_style, "writing-mode", "lr"), "tb"); // FIXME
808 // Output all buffered glyphs
809 std::vector<SvgGlyph>::iterator i = _glyphs.begin();
810 while (1) {
811 const SvgGlyph& glyph = (*i);
812 std::vector<SvgGlyph>::iterator prev_iterator = i - 1;
813 // Check if we need to make a new tspan
814 if (glyph.style_changed) {
815 new_tspan = true;
816 } else if ( i != _glyphs.begin() ) {
817 const SvgGlyph& prev_glyph = (*prev_iterator);
818 if ( ( is_vertical && prev_glyph.transformed_position[0] != glyph.transformed_position[0] ) ||
819 ( !is_vertical && prev_glyph.transformed_position[1] != glyph.transformed_position[1] ) ) {
820 new_tspan = true;
821 }
822 }
823 // Create tspan node if needed
824 if ( new_tspan || i == _glyphs.end() ) {
825 if (tspan_node) {
826 // Set the x and y coordinate arrays
827 tspan_node->setAttribute("x", x_coords.c_str());
828 tspan_node->setAttribute("y", y_coords.c_str());
829 TRACE(("tspan content: %s\n", text_buffer.c_str()));
830 // Add text content node to tspan
831 Inkscape::XML::Node *text_content = _xml_doc->createTextNode(text_buffer.c_str());
832 tspan_node->appendChild(text_content);
833 Inkscape::GC::release(text_content);
834 text_node->appendChild(tspan_node);
835 // Clear temporary buffers
836 x_coords.clear();
837 y_coords.clear();
838 text_buffer.clear();
839 Inkscape::GC::release(tspan_node);
840 }
841 if ( i == _glyphs.end() ) {
842 sp_repr_css_attr_unref((*prev_iterator).style);
843 break;
844 } else {
845 tspan_node = _xml_doc->createElement("svg:tspan");
846 // Set style and unref SPCSSAttr if it won't be needed anymore
847 if ( i != _glyphs.begin() ) {
848 sp_repr_css_change(tspan_node, glyph.style, "style");
849 if (glyph.style_changed) { // Free previous style
850 sp_repr_css_attr_unref((*prev_iterator).style);
851 }
852 }
853 }
854 new_tspan = false;
855 }
856 if ( x_coords.length() > 0 ) {
857 x_coords.append(" ");
858 y_coords.append(" ");
859 }
860 // Append the coordinates to their respective strings
861 Inkscape::CSSOStringStream os_x;
862 os_x << glyph.transformed_position[0];
863 x_coords.append(os_x.str());
864 Inkscape::CSSOStringStream os_y;
865 os_y << glyph.transformed_position[1];
866 y_coords.append(os_y.str());
868 // Append the character to the text buffer
869 text_buffer.append((char *)&glyph.code, 1);
871 i++;
872 }
873 _container->appendChild(text_node);
874 Inkscape::GC::release(text_node);
876 _glyphs.clear();
877 }
879 void SvgBuilder::beginString(GfxState *state, GooString *s) {
880 if (_need_font_update) {
881 updateFont(state);
882 }
883 IFTRACE(double *m = state->getTextMat());
884 TRACE(("tm: %f %f %f %f %f %f\n",m[0], m[1],m[2], m[3], m[4], m[5]));
885 IFTRACE(m = _current_font->getFontMatrix());
886 TRACE(("fm: %f %f %f %f %f %f\n",m[0], m[1],m[2], m[3], m[4], m[5]));
887 IFTRACE(m = state->getCTM());
888 TRACE(("ctm: %f %f %f %f %f %f\n",m[0], m[1],m[2], m[3], m[4], m[5]));
889 }
891 /**
892 * \brief Adds the specified character to the text buffer
893 * Takes care of converting it to UTF-8 and generates a new style repr if style
894 * has changed since the last call.
895 */
896 void SvgBuilder::addChar(GfxState *state, double x, double y,
897 double dx, double dy,
898 double originX, double originY,
899 CharCode code, int nBytes, Unicode *u, int uLen) {
902 bool is_space = ( uLen == 1 && u[0] == 32 );
903 // Skip beginning space
904 if ( is_space && _glyphs.size() < 1 ) {
905 return;
906 }
907 // Allow only one space in a row
908 if ( is_space && _glyphs[_glyphs.size() - 1].code_size == 1 &&
909 _glyphs[_glyphs.size() - 1].code[0] == 32 ) {
910 return;
911 }
913 SvgGlyph new_glyph;
914 new_glyph.is_space = is_space;
915 new_glyph.position = NR::Point( x - originX, y - originY );
916 new_glyph.transformed_position = new_glyph.position * _text_matrix;
917 new_glyph.dx = dx;
918 new_glyph.dy = dy;
920 // Convert the character to UTF-8 since that's our SVG document's encoding
921 static UnicodeMap *u_map = NULL;
922 if ( u_map == NULL ) {
923 GooString *enc = new GooString("UTF-8");
924 u_map = globalParams->getUnicodeMap(enc);
925 u_map->incRefCnt();
926 delete enc;
927 }
928 int code_size = 0;
929 for ( int i = 0 ; i < uLen ; i++ ) {
930 code_size += u_map->mapUnicode(u[i], (char *)&new_glyph.code[code_size], sizeof(new_glyph.code) - code_size);
931 }
932 new_glyph.code_size = code_size;
934 // Copy current style if it has changed since the previous glyph
935 if (_invalidated_style || _glyphs.size() == 0 ) {
936 new_glyph.style_changed = true;
937 int render_mode = state->getRender();
938 // Set style
939 bool has_fill = !( render_mode & 1 );
940 bool has_stroke = ( render_mode & 3 ) == 1 || ( render_mode & 3 ) == 2;
941 new_glyph.style = _setStyle(state, has_fill, has_stroke);
942 new_glyph.render_mode = render_mode;
943 sp_repr_css_merge(new_glyph.style, _font_style); // Merge with font style
944 _invalidated_style = false;
945 } else {
946 new_glyph.style_changed = false;
947 // Point to previous glyph's style information
948 const SvgGlyph& prev_glyph = _glyphs.back();
949 new_glyph.style = prev_glyph.style;
950 new_glyph.render_mode = prev_glyph.render_mode;
951 }
952 _glyphs.push_back(new_glyph);
953 }
955 void SvgBuilder::endString(GfxState *state) {
956 }
958 void SvgBuilder::beginTextObject(GfxState *state) {
959 _in_text_object = true;
960 _invalidated_style = true; // Force copying of current state
961 _current_state = state;
962 }
964 void SvgBuilder::endTextObject(GfxState *state) {
965 _flushText();
966 // TODO: clip if render_mode >= 4
967 _in_text_object = false;
968 }
970 /**
971 * Helper functions for supporting direct PNG output into a base64 encoded stream
972 */
973 void png_write_base64stream(png_structp png_ptr, png_bytep data, png_size_t length)
974 {
975 Inkscape::IO::Base64OutputStream *stream =
976 (Inkscape::IO::Base64OutputStream*)png_get_io_ptr(png_ptr); // Get pointer to stream
977 for ( unsigned i = 0 ; i < length ; i++ ) {
978 stream->put((int)data[i]);
979 }
980 }
982 void png_flush_base64stream(png_structp png_ptr)
983 {
984 Inkscape::IO::Base64OutputStream *stream =
985 (Inkscape::IO::Base64OutputStream*)png_get_io_ptr(png_ptr); // Get pointer to stream
986 stream->flush();
987 }
989 /**
990 * \brief Creates an <image> element containing the given ImageStream as a PNG
991 *
992 */
993 Inkscape::XML::Node *SvgBuilder::_createImage(Stream *str, int width, int height,
994 GfxImageColorMap *color_map, int *mask_colors, bool alpha_only, bool invert_alpha) {
996 // Create PNG write struct
997 png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
998 if ( png_ptr == NULL ) {
999 return NULL;
1000 }
1001 // Create PNG info struct
1002 png_infop info_ptr = png_create_info_struct(png_ptr);
1003 if ( info_ptr == NULL ) {
1004 png_destroy_write_struct(&png_ptr, NULL);
1005 return NULL;
1006 }
1007 // Set error handler
1008 if (setjmp(png_ptr->jmpbuf)) {
1009 png_destroy_write_struct(&png_ptr, &info_ptr);
1010 return NULL;
1011 }
1013 // Set read/write functions
1014 Inkscape::IO::StringOutputStream base64_string;
1015 Inkscape::IO::Base64OutputStream base64_stream(base64_string);
1016 FILE *fp;
1017 gchar *file_name;
1018 bool embed_image = true;
1019 if (embed_image) {
1020 base64_stream.setColumnWidth(0); // Disable line breaks
1021 png_set_write_fn(png_ptr, &base64_stream, png_write_base64stream, png_flush_base64stream);
1022 } else {
1023 static int counter = 0;
1024 file_name = g_strdup_printf("createImage%d.png", counter++);
1025 fp = fopen(file_name, "wb");
1026 if ( fp == NULL ) {
1027 png_destroy_write_struct(&png_ptr, &info_ptr);
1028 g_free(file_name);
1029 return NULL;
1030 }
1031 png_init_io(png_ptr, fp);
1032 }
1034 // Set header data
1035 if (!invert_alpha) {
1036 png_set_invert_alpha(png_ptr);
1037 }
1038 png_color_8 sig_bit;
1039 if (alpha_only) {
1040 png_set_IHDR(png_ptr, info_ptr,
1041 width,
1042 height,
1043 8, /* bit_depth */
1044 PNG_COLOR_TYPE_GRAY,
1045 PNG_INTERLACE_NONE,
1046 PNG_COMPRESSION_TYPE_BASE,
1047 PNG_FILTER_TYPE_BASE);
1048 sig_bit.red = 0;
1049 sig_bit.green = 0;
1050 sig_bit.blue = 0;
1051 sig_bit.gray = 8;
1052 sig_bit.alpha = 0;
1053 } else {
1054 png_set_IHDR(png_ptr, info_ptr,
1055 width,
1056 height,
1057 8, /* bit_depth */
1058 PNG_COLOR_TYPE_RGB_ALPHA,
1059 PNG_INTERLACE_NONE,
1060 PNG_COMPRESSION_TYPE_BASE,
1061 PNG_FILTER_TYPE_BASE);
1062 sig_bit.red = 8;
1063 sig_bit.green = 8;
1064 sig_bit.blue = 8;
1065 sig_bit.alpha = 8;
1066 }
1067 png_set_sBIT(png_ptr, info_ptr, &sig_bit);
1068 png_set_bgr(png_ptr);
1069 // Write the file header
1070 png_write_info(png_ptr, info_ptr);
1072 // Convert pixels
1073 ImageStream *image_stream;
1074 if (alpha_only) {
1075 if (color_map) {
1076 image_stream = new ImageStream(str, width, color_map->getNumPixelComps(),
1077 color_map->getBits());
1078 } else {
1079 image_stream = new ImageStream(str, width, 1, 1);
1080 }
1081 image_stream->reset();
1083 // Convert grayscale values
1084 if (color_map) {
1085 unsigned char *buffer = new unsigned char[width];
1086 for ( int y = 0 ; y < height ; y++ ) {
1087 unsigned char *row = image_stream->getLine();
1088 color_map->getGrayLine(row, buffer, width);
1089 png_write_row(png_ptr, (png_bytep)buffer);
1090 }
1091 delete buffer;
1092 } else {
1093 for ( int y = 0 ; y < height ; y++ ) {
1094 unsigned char *row = image_stream->getLine();
1095 png_write_row(png_ptr, (png_bytep)row);
1096 }
1097 }
1098 } else if (color_map) {
1099 image_stream = new ImageStream(str, width,
1100 color_map->getNumPixelComps(),
1101 color_map->getBits());
1102 image_stream->reset();
1104 // Convert RGB values
1105 unsigned int *buffer = new unsigned int[width];
1106 if (mask_colors) {
1107 for ( int y = 0 ; y < height ; y++ ) {
1108 unsigned char *row = image_stream->getLine();
1109 color_map->getRGBLine(row, buffer, width);
1111 unsigned int *dest = buffer;
1112 for ( int x = 0 ; x < width ; x++ ) {
1113 // Check each color component against the mask
1114 for ( int i = 0; i < color_map->getNumPixelComps() ; i++) {
1115 if ( row[i] < mask_colors[2*i] * 255 ||
1116 row[i] > mask_colors[2*i + 1] * 255 ) {
1117 *dest = *dest | 0xff000000;
1118 break;
1119 }
1120 }
1121 // Advance to the next pixel
1122 row += color_map->getNumPixelComps();
1123 dest++;
1124 }
1125 // Write it to the PNG
1126 png_write_row(png_ptr, (png_bytep)buffer);
1127 }
1128 } else {
1129 for ( int i = 0 ; i < height ; i++ ) {
1130 unsigned char *row = image_stream->getLine();
1131 memset((void*)buffer, 0xff, sizeof(int) * width);
1132 color_map->getRGBLine(row, buffer, width);
1133 png_write_row(png_ptr, (png_bytep)buffer);
1134 }
1135 }
1136 delete buffer;
1138 } else { // A colormap must be provided, so quit
1139 png_destroy_write_struct(&png_ptr, &info_ptr);
1140 if (!embed_image) {
1141 fclose(fp);
1142 g_free(file_name);
1143 }
1144 return NULL;
1145 }
1146 delete image_stream;
1147 str->close();
1148 // Close PNG
1149 png_write_end(png_ptr, info_ptr);
1150 png_destroy_write_struct(&png_ptr, &info_ptr);
1151 base64_stream.close();
1153 // Create repr
1154 Inkscape::XML::Node *image_node = _xml_doc->createElement("svg:image");
1155 sp_repr_set_svg_double(image_node, "width", width);
1156 sp_repr_set_svg_double(image_node, "height", height);
1157 // Set transformation
1158 svgSetTransform(image_node, 1.0/(double)width, 0.0, 0.0, -1.0/(double)height, 0.0, 1.0);
1160 // Create href
1161 if (embed_image) {
1162 // Append format specification to the URI
1163 Glib::ustring& png_data = base64_string.getString();
1164 png_data.insert(0, "data:image/png;base64,");
1165 image_node->setAttribute("xlink:href", png_data.c_str());
1166 } else {
1167 fclose(fp);
1168 image_node->setAttribute("xlink:href", file_name);
1169 g_free(file_name);
1170 }
1172 return image_node;
1173 }
1175 void SvgBuilder::addImage(GfxState *state, Stream *str, int width, int height,
1176 GfxImageColorMap *color_map, int *mask_colors) {
1178 Inkscape::XML::Node *image_node = _createImage(str, width, height, color_map, mask_colors);
1179 if (image_node) {
1180 _container->appendChild(image_node);
1181 Inkscape::GC::release(image_node);
1182 }
1183 }
1186 } } } /* namespace Inkscape, Extension, Internal */
1188 #endif /* HAVE_POPPLER */
1190 /*
1191 Local Variables:
1192 mode:c++
1193 c-file-style:"stroustrup"
1194 c-file-offsets:((innamespace . 0)(inline-open . 0))
1195 indent-tabs-mode:nil
1196 fill-column:99
1197 End:
1198 */
1199 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :