1 /*
2 * Inkscape::Text::Layout - text layout engine output functions
3 *
4 * Authors:
5 * Richard Hughes <cyreve@users.sf.net>
6 *
7 * Copyright (C) 2005 Richard Hughes
8 *
9 * Released under GNU GPL, read the file 'COPYING' for more information
10 */
11 #include <glib/gmem.h>
12 #include "Layout-TNG.h"
13 #include "display/nr-arena-glyphs.h"
14 #include "style.h"
15 #include "print.h"
16 #include "extension/print.h"
17 #include "livarot/Path.h"
18 #include "libnr/nr-matrix-fns.h"
19 #include "libnr/nr-scale-matrix-ops.h"
20 #include "libnr/nr-convert2geom.h"
21 #include "font-instance.h"
22 #include "svg/svg-length.h"
23 #include "extension/internal/cairo-render-context.h"
24 #include "display/curve.h"
25 #include <2geom/pathvector.h>
27 namespace Inkscape {
28 namespace Extension {
29 namespace Internal {
30 class CairoRenderContext;
31 class CairoGlyphInfo;
32 }
33 }
34 }
36 using Inkscape::Extension::Internal::CairoRenderContext;
37 using Inkscape::Extension::Internal::CairoGlyphInfo;
39 namespace Inkscape {
40 namespace Text {
42 void Layout::_clearOutputObjects()
43 {
44 _paragraphs.clear();
45 _lines.clear();
46 _chunks.clear();
47 for (std::vector<Span>::iterator it_span = _spans.begin() ; it_span != _spans.end() ; it_span++)
48 if (it_span->font) it_span->font->Unref();
49 _spans.clear();
50 _characters.clear();
51 _glyphs.clear();
52 _path_fitted = NULL;
53 }
55 void Layout::LineHeight::max(LineHeight const &other)
56 {
57 if (other.ascent > ascent) ascent = other.ascent;
58 if (other.descent > descent) descent = other.descent;
59 if (other.leading > leading) leading = other.leading;
60 }
62 void Layout::_getGlyphTransformMatrix(int glyph_index, NR::Matrix *matrix) const
63 {
64 Span const &span = _glyphs[glyph_index].span(this);
65 double sin_rotation = sin(_glyphs[glyph_index].rotation);
66 double cos_rotation = cos(_glyphs[glyph_index].rotation);
67 (*matrix)[0] = span.font_size * cos_rotation;
68 (*matrix)[1] = span.font_size * sin_rotation;
69 (*matrix)[2] = span.font_size * sin_rotation;
70 (*matrix)[3] = -span.font_size * cos_rotation;
71 if (span.block_progression == LEFT_TO_RIGHT || span.block_progression == RIGHT_TO_LEFT) {
72 (*matrix)[4] = _lines[_chunks[span.in_chunk].in_line].baseline_y + _glyphs[glyph_index].y;
73 (*matrix)[5] = _chunks[span.in_chunk].left_x + _glyphs[glyph_index].x;
74 } else {
75 (*matrix)[4] = _chunks[span.in_chunk].left_x + _glyphs[glyph_index].x;
76 (*matrix)[5] = _lines[_chunks[span.in_chunk].in_line].baseline_y + _glyphs[glyph_index].y;
77 }
78 }
80 void Layout::show(NRArenaGroup *in_arena, NRRect const *paintbox) const
81 {
82 int glyph_index = 0;
83 for (unsigned span_index = 0 ; span_index < _spans.size() ; span_index++) {
84 if (_input_stream[_spans[span_index].in_input_stream_item]->Type() != TEXT_SOURCE) continue;
85 InputStreamTextSource const *text_source = static_cast<InputStreamTextSource const *>(_input_stream[_spans[span_index].in_input_stream_item]);
86 NRArenaGlyphsGroup *nr_group = NRArenaGlyphsGroup::create(in_arena->arena);
87 nr_arena_item_add_child(in_arena, nr_group, NULL);
88 nr_arena_item_unref(nr_group);
90 nr_arena_glyphs_group_set_style(nr_group, text_source->style);
91 while (glyph_index < (int)_glyphs.size() && _characters[_glyphs[glyph_index].in_character].in_span == span_index) {
92 if (_characters[_glyphs[glyph_index].in_character].in_glyph != -1) {
93 NR::Matrix glyph_matrix;
94 _getGlyphTransformMatrix(glyph_index, &glyph_matrix);
95 nr_arena_glyphs_group_add_component(nr_group, _spans[span_index].font, _glyphs[glyph_index].glyph, &glyph_matrix);
96 }
97 glyph_index++;
98 }
99 nr_arena_glyphs_group_set_paintbox(NR_ARENA_GLYPHS_GROUP(nr_group), paintbox);
100 }
101 nr_arena_item_request_update(NR_ARENA_ITEM(in_arena), NR_ARENA_ITEM_STATE_ALL, FALSE);
102 }
104 void Layout::getBoundingBox(NRRect *bounding_box, NR::Matrix const &transform, int start, int length) const
105 {
106 for (unsigned glyph_index = 0 ; glyph_index < _glyphs.size() ; glyph_index++) {
107 if (_characters[_glyphs[glyph_index].in_character].in_glyph == -1) continue;
108 if (start != -1 && (int) _glyphs[glyph_index].in_character < start) continue;
109 if (length != -1) {
110 if (start == -1)
111 start = 0;
112 if ((int) _glyphs[glyph_index].in_character > start + length) continue;
113 }
114 // this could be faster
115 NR::Matrix glyph_matrix;
116 _getGlyphTransformMatrix(glyph_index, &glyph_matrix);
117 NR::Matrix total_transform = glyph_matrix;
118 total_transform *= transform;
119 NR::Maybe<NR::Rect> glyph_rect = _glyphs[glyph_index].span(this).font->BBox(_glyphs[glyph_index].glyph);
120 if (glyph_rect) {
121 NR::Point bmi = glyph_rect->min(), bma = glyph_rect->max();
122 NR::Point tlp(bmi[0],bmi[1]), trp(bma[0],bmi[1]), blp(bmi[0],bma[1]), brp(bma[0],bma[1]);
123 tlp *= total_transform;
124 trp *= total_transform;
125 blp *= total_transform;
126 brp *= total_transform;
127 *glyph_rect = NR::Rect(tlp,trp);
128 glyph_rect->expandTo(blp);
129 glyph_rect->expandTo(brp);
130 if ( (glyph_rect->min())[0] < bounding_box->x0 ) bounding_box->x0=(glyph_rect->min())[0];
131 if ( (glyph_rect->max())[0] > bounding_box->x1 ) bounding_box->x1=(glyph_rect->max())[0];
132 if ( (glyph_rect->min())[1] < bounding_box->y0 ) bounding_box->y0=(glyph_rect->min())[1];
133 if ( (glyph_rect->max())[1] > bounding_box->y1 ) bounding_box->y1=(glyph_rect->max())[1];
134 }
135 }
136 }
138 void Layout::print(SPPrintContext *ctx,
139 NRRect const *pbox, NRRect const *dbox, NRRect const *bbox,
140 NR::Matrix const &ctm) const
141 {
142 if (_input_stream.empty()) return;
144 Direction block_progression = _blockProgression();
145 bool text_to_path = ctx->module->textToPath();
146 for (unsigned glyph_index = 0 ; glyph_index < _glyphs.size() ; ) {
147 if (_characters[_glyphs[glyph_index].in_character].in_glyph == -1) {
148 // invisible glyphs
149 unsigned same_character = _glyphs[glyph_index].in_character;
150 while (_glyphs[glyph_index].in_character == same_character)
151 glyph_index++;
152 continue;
153 }
154 NR::Matrix glyph_matrix;
155 Span const &span = _spans[_characters[_glyphs[glyph_index].in_character].in_span];
156 InputStreamTextSource const *text_source = static_cast<InputStreamTextSource const *>(_input_stream[span.in_input_stream_item]);
157 if (text_to_path || _path_fitted) {
158 Geom::PathVector const * pv = span.font->PathVector(_glyphs[glyph_index].glyph);
159 if (pv) {
160 _getGlyphTransformMatrix(glyph_index, &glyph_matrix);
161 Geom::PathVector temp_pv = (*pv) * to_2geom(glyph_matrix);
162 if (!text_source->style->fill.isNone())
163 sp_print_fill(ctx, temp_pv, &ctm, text_source->style, pbox, dbox, bbox);
164 if (!text_source->style->stroke.isNone())
165 sp_print_stroke(ctx, temp_pv, &ctm, text_source->style, pbox, dbox, bbox);
166 }
167 glyph_index++;
168 } else {
169 NR::Point g_pos(0,0); // all strings are output at (0,0) because we do the translation using the matrix
170 glyph_matrix = NR::Matrix(NR::scale(1.0, -1.0) * NR::Matrix(NR::rotate(_glyphs[glyph_index].rotation)));
171 if (block_progression == LEFT_TO_RIGHT || block_progression == RIGHT_TO_LEFT) {
172 glyph_matrix[4] = span.line(this).baseline_y + span.baseline_shift;
173 // since we're outputting character codes, not glyphs, we want the character x
174 glyph_matrix[5] = span.chunk(this).left_x + span.x_start + _characters[_glyphs[glyph_index].in_character].x;
175 } else {
176 glyph_matrix[4] = span.chunk(this).left_x + span.x_start + _characters[_glyphs[glyph_index].in_character].x;
177 glyph_matrix[5] = span.line(this).baseline_y + span.baseline_shift;
178 }
179 Glib::ustring::const_iterator span_iter = span.input_stream_first_character;
180 unsigned char_index = _glyphs[glyph_index].in_character;
181 unsigned original_span = _characters[char_index].in_span;
182 while (char_index && _characters[char_index - 1].in_span == original_span) {
183 char_index--;
184 span_iter++;
185 }
187 // try to output as many characters as possible in one go by detecting kerning and stopping when we encounter it
188 Glib::ustring span_string;
189 double char_x = _characters[_glyphs[glyph_index].in_character].x;
190 unsigned this_span_index = _characters[_glyphs[glyph_index].in_character].in_span;
191 do {
192 span_string += *span_iter;
193 span_iter++;
195 unsigned same_character = _glyphs[glyph_index].in_character;
196 while (glyph_index < _glyphs.size() && _glyphs[glyph_index].in_character == same_character) {
197 char_x += _glyphs[glyph_index].width;
198 glyph_index++;
199 }
200 } while (glyph_index < _glyphs.size()
201 && _path_fitted == NULL
202 && _characters[_glyphs[glyph_index].in_character].in_span == this_span_index
203 && fabs(char_x - _characters[_glyphs[glyph_index].in_character].x) < 1e-5);
204 sp_print_bind(ctx, glyph_matrix, 1.0);
205 sp_print_text(ctx, span_string.c_str(), g_pos, text_source->style);
206 sp_print_release(ctx);
207 }
208 }
209 }
211 #ifdef HAVE_CAIRO_PDF
212 void Layout::showGlyphs(CairoRenderContext *ctx) const
213 {
214 if (_input_stream.empty()) return;
216 bool clip_mode = false;//(ctx->getRenderMode() == CairoRenderContext::RENDER_MODE_CLIP);
217 std::vector<CairoGlyphInfo> glyphtext;
219 for (unsigned glyph_index = 0 ; glyph_index < _glyphs.size() ; ) {
220 if (_characters[_glyphs[glyph_index].in_character].in_glyph == -1) {
221 // invisible glyphs
222 unsigned same_character = _glyphs[glyph_index].in_character;
223 while (_glyphs[glyph_index].in_character == same_character)
224 glyph_index++;
225 continue;
226 }
227 Span const &span = _spans[_characters[_glyphs[glyph_index].in_character].in_span];
228 InputStreamTextSource const *text_source = static_cast<InputStreamTextSource const *>(_input_stream[span.in_input_stream_item]);
230 NR::Matrix glyph_matrix;
231 _getGlyphTransformMatrix(glyph_index, &glyph_matrix);
232 if (clip_mode) {
233 Geom::PathVector const *pathv = span.font->PathVector(_glyphs[glyph_index].glyph);
234 if (pathv) {
235 Geom::PathVector pathv_trans = (*pathv) * to_2geom(glyph_matrix);
236 SPStyle const *style = text_source->style;
237 ctx->renderPathVector(pathv_trans, style, NULL);
238 }
239 glyph_index++;
240 continue;
241 }
243 NR::Matrix font_matrix;
244 if (_path_fitted == NULL) {
245 font_matrix = glyph_matrix;
246 font_matrix[4] = 0;
247 font_matrix[5] = 0;
248 } else {
249 font_matrix.set_identity();
250 }
252 Glib::ustring::const_iterator span_iter = span.input_stream_first_character;
253 unsigned char_index = _glyphs[glyph_index].in_character;
254 unsigned original_span = _characters[char_index].in_span;
255 while (char_index && _characters[char_index - 1].in_span == original_span) {
256 char_index--;
257 span_iter++;
258 }
260 // try to output as many characters as possible in one go
261 Glib::ustring span_string;
262 unsigned this_span_index = _characters[_glyphs[glyph_index].in_character].in_span;
263 unsigned int first_index = glyph_index;
264 glyphtext.clear();
265 do {
266 span_string += *span_iter;
267 span_iter++;
269 unsigned same_character = _glyphs[glyph_index].in_character;
270 while (glyph_index < _glyphs.size() && _glyphs[glyph_index].in_character == same_character) {
271 if (glyph_index != first_index)
272 _getGlyphTransformMatrix(glyph_index, &glyph_matrix);
274 CairoGlyphInfo info;
275 info.index = _glyphs[glyph_index].glyph;
276 if (_path_fitted == NULL) {
277 info.x = glyph_matrix[4];
278 info.y = glyph_matrix[5];
279 } else {
280 info.x = 0;
281 info.y = 0;
282 }
283 glyphtext.push_back(info);
285 glyph_index++;
286 }
287 } while (glyph_index < _glyphs.size()
288 && _path_fitted == NULL
289 && NR::transform_equalp(font_matrix, glyph_matrix, NR_EPSILON)
290 && _characters[_glyphs[glyph_index].in_character].in_span == this_span_index);
292 // remove vertical flip
293 font_matrix[3] *= -1.0;
295 SPStyle const *style = text_source->style;
296 float opacity = SP_SCALE24_TO_FLOAT(style->opacity.value);
298 if (_path_fitted) {
299 ctx->pushState();
300 ctx->transform(&glyph_matrix);
301 } else if (opacity != 1.0) {
302 ctx->pushState();
303 ctx->setStateForStyle(style);
304 ctx->pushLayer();
305 }
306 if (glyph_index - first_index > 0)
307 ctx->renderGlyphtext(span.font->pFont, &font_matrix, glyphtext, style);
308 if (_path_fitted)
309 ctx->popState();
310 else if (opacity != 1.0) {
311 ctx->popLayer();
312 ctx->popState();
313 }
314 }
315 }
316 #endif
318 // these functions are for dumpAsText() only. No need to translate
319 static char const *direction_to_text(Layout::Direction d)
320 {
321 switch (d) {
322 case Layout::LEFT_TO_RIGHT: return "ltr";
323 case Layout::RIGHT_TO_LEFT: return "rtl";
324 case Layout::TOP_TO_BOTTOM: return "ttb";
325 case Layout::BOTTOM_TO_TOP: return "btt";
326 }
327 return "???";
328 }
330 static char const *style_to_text(PangoStyle s)
331 {
332 switch (s) {
333 case PANGO_STYLE_NORMAL: return "upright";
334 case PANGO_STYLE_ITALIC: return "italic";
335 case PANGO_STYLE_OBLIQUE: return "oblique";
336 }
337 return "???";
338 }
340 static char const *weight_to_text(PangoWeight w)
341 {
342 switch (w) {
343 case PANGO_WEIGHT_ULTRALIGHT: return "ultralight";
344 case PANGO_WEIGHT_LIGHT : return "light";
345 case PANGO_WEIGHT_SEMIBOLD : return "semibold";
346 case PANGO_WEIGHT_NORMAL : return "normalweight";
347 case PANGO_WEIGHT_BOLD : return "bold";
348 case PANGO_WEIGHT_ULTRABOLD : return "ultrabold";
349 case PANGO_WEIGHT_HEAVY : return "heavy";
350 }
351 return "???";
352 }
354 Glib::ustring Layout::dumpAsText() const
355 {
356 Glib::ustring result;
358 for (unsigned span_index = 0 ; span_index < _spans.size() ; span_index++) {
359 char line[256];
360 snprintf(line, sizeof(line), "==== span %d\n", span_index);
361 result += line;
362 snprintf(line, sizeof(line), " in para %d (direction=%s)\n", _lines[_chunks[_spans[span_index].in_chunk].in_line].in_paragraph,
363 direction_to_text(_paragraphs[_lines[_chunks[_spans[span_index].in_chunk].in_line].in_paragraph].base_direction));
364 result += line;
365 snprintf(line, sizeof(line), " in source %d (type=%d, cookie=%p)\n", _spans[span_index].in_input_stream_item,
366 _input_stream[_spans[span_index].in_input_stream_item]->Type(),
367 _input_stream[_spans[span_index].in_input_stream_item]->source_cookie);
368 result += line;
369 snprintf(line, sizeof(line), " in line %d (baseline=%f, shape=%d)\n", _chunks[_spans[span_index].in_chunk].in_line,
370 _lines[_chunks[_spans[span_index].in_chunk].in_line].baseline_y,
371 _lines[_chunks[_spans[span_index].in_chunk].in_line].in_shape);
372 result += line;
373 snprintf(line, sizeof(line), " in chunk %d (x=%f, baselineshift=%f)\n", _spans[span_index].in_chunk, _chunks[_spans[span_index].in_chunk].left_x, _spans[span_index].baseline_shift);
374 result += line;
375 if (_spans[span_index].font) {
376 snprintf(line, sizeof(line), " font '%s' %f %s %s\n", pango_font_description_get_family(_spans[span_index].font->descr), _spans[span_index].font_size, style_to_text(pango_font_description_get_style(_spans[span_index].font->descr)), weight_to_text(pango_font_description_get_weight(_spans[span_index].font->descr)));
377 result += line;
378 }
379 snprintf(line, sizeof(line), " x_start = %f, x_end = %f\n", _spans[span_index].x_start, _spans[span_index].x_end);
380 result += line;
381 snprintf(line, sizeof(line), " line height: ascent %f, descent %f leading %f\n", _spans[span_index].line_height.ascent, _spans[span_index].line_height.descent, _spans[span_index].line_height.leading);
382 result += line;
383 snprintf(line, sizeof(line), " direction %s, block-progression %s\n", direction_to_text(_spans[span_index].direction), direction_to_text(_spans[span_index].block_progression));
384 result += line;
385 result += " ** characters:\n";
386 Glib::ustring::const_iterator iter_char = _spans[span_index].input_stream_first_character;
387 // very inefficent code. what the hell, it's only debug stuff.
388 for (unsigned char_index = 0 ; char_index < _characters.size() ; char_index++) {
389 if (_characters[char_index].in_span != span_index) continue;
390 if (_input_stream[_spans[span_index].in_input_stream_item]->Type() != TEXT_SOURCE) {
391 snprintf(line, sizeof(line), " %d: control x=%f flags=%03x glyph=%d\n", char_index, _characters[char_index].x, *(unsigned*)&_characters[char_index].char_attributes, _characters[char_index].in_glyph);
392 } else {
393 snprintf(line, sizeof(line), " %d: '%c' x=%f flags=%03x glyph=%d\n", char_index, *iter_char, _characters[char_index].x, *(unsigned*)&_characters[char_index].char_attributes, _characters[char_index].in_glyph);
394 iter_char++;
395 }
396 result += line;
397 }
398 result += " ** glyphs:\n";
399 for (unsigned glyph_index = 0 ; glyph_index < _glyphs.size() ; glyph_index++) {
400 if (_characters[_glyphs[glyph_index].in_character].in_span != span_index) continue;
401 snprintf(line, sizeof(line), " %d: %d (%f,%f) rot=%f cx=%f char=%d\n", glyph_index, _glyphs[glyph_index].glyph, _glyphs[glyph_index].x, _glyphs[glyph_index].y, _glyphs[glyph_index].rotation, _glyphs[glyph_index].width, _glyphs[glyph_index].in_character);
402 result += line;
403 }
404 result += "\n";
405 }
406 result += "EOT\n";
407 return result;
408 }
410 void Layout::fitToPathAlign(SVGLength const &startOffset, Path const &path)
411 {
412 double offset = 0.0;
414 if (startOffset._set) {
415 if (startOffset.unit == SVGLength::PERCENT)
416 offset = startOffset.computed * const_cast<Path&>(path).Length();
417 else
418 offset = startOffset.computed;
419 }
421 switch (_paragraphs.front().alignment) {
422 case CENTER:
423 offset -= _getChunkWidth(0) * 0.5;
424 break;
425 case RIGHT:
426 offset -= _getChunkWidth(0);
427 break;
428 default:
429 break;
430 }
432 if (_characters.empty()) {
433 int unused = 0;
434 Path::cut_position *point_otp = const_cast<Path&>(path).CurvilignToPosition(1, &offset, unused);
435 if (offset >= 0.0 && point_otp != NULL && point_otp[0].piece >= 0) {
436 NR::Point point;
437 NR::Point tangent;
438 const_cast<Path&>(path).PointAndTangentAt(point_otp[0].piece, point_otp[0].t, point, tangent);
439 _empty_cursor_shape.position = point;
440 _empty_cursor_shape.rotation = atan2(tangent[NR::Y], tangent[NR::X]);
441 }
442 }
444 for (unsigned char_index = 0 ; char_index < _characters.size() ; ) {
445 int next_cluster_glyph_index;
446 unsigned next_cluster_char_index;
447 double character_advance;
448 Span const &span = _characters[char_index].span(this);
450 for (next_cluster_char_index = char_index + 1 ;
451 next_cluster_char_index < _characters.size() && !_characters[next_cluster_char_index].char_attributes.is_cursor_position;
452 next_cluster_char_index++);
454 if (next_cluster_char_index == _characters.size()) {
455 next_cluster_glyph_index = _glyphs.size();
456 character_advance = 0.0; // arbitrary because we're not going to advance
457 } else {
458 next_cluster_glyph_index = _characters[next_cluster_char_index].in_glyph;
459 character_advance = (_glyphs[next_cluster_glyph_index].x + _glyphs[next_cluster_glyph_index].chunk(this).left_x)
460 - (_glyphs[_characters[char_index].in_glyph].x + span.chunk(this).left_x);
461 }
463 double start_offset = offset + span.x_start + _characters[char_index].x;
464 double cluster_width = 0.0;
465 for (int glyph_index = _characters[char_index].in_glyph ; glyph_index < next_cluster_glyph_index ; glyph_index++)
466 cluster_width += _glyphs[glyph_index].width;
467 if (span.direction == RIGHT_TO_LEFT)
468 start_offset -= cluster_width;
469 double end_offset = start_offset + cluster_width;
471 int unused = 0;
472 double midpoint_offset = (start_offset + end_offset) * 0.5;
473 // as far as I know these functions are const, they're just not marked as such
474 Path::cut_position *midpoint_otp = const_cast<Path&>(path).CurvilignToPosition(1, &midpoint_offset, unused);
475 if (midpoint_offset >= 0.0 && midpoint_otp != NULL && midpoint_otp[0].piece >= 0) {
476 NR::Point midpoint;
477 NR::Point tangent;
479 const_cast<Path&>(path).PointAndTangentAt(midpoint_otp[0].piece, midpoint_otp[0].t, midpoint, tangent);
481 if (start_offset >= 0.0 && end_offset >= 0.0) {
482 Path::cut_position *start_otp = const_cast<Path&>(path).CurvilignToPosition(1, &start_offset, unused);
483 if (start_otp != NULL && start_otp[0].piece >= 0) {
484 Path::cut_position *end_otp = const_cast<Path&>(path).CurvilignToPosition(1, &end_offset, unused);
485 if (end_otp != NULL && end_otp[0].piece >= 0) {
486 bool on_same_subpath = true;
487 for (size_t i = 0 ; i < path.pts.size() ; i++) {
488 if (path.pts[i].piece <= start_otp[0].piece) continue;
489 if (path.pts[i].piece >= end_otp[0].piece) break;
490 if (path.pts[i].isMoveTo == polyline_moveto) {
491 on_same_subpath = false;
492 break;
493 }
494 }
495 if (on_same_subpath) {
496 // both points were on the same subpath (without this test the angle is very weird)
497 NR::Point startpoint, endpoint;
498 const_cast<Path&>(path).PointAt(start_otp[0].piece, start_otp[0].t, startpoint);
499 const_cast<Path&>(path).PointAt(end_otp[0].piece, end_otp[0].t, endpoint);
500 if (endpoint != startpoint) {
501 tangent = endpoint - startpoint;
502 tangent.normalize();
503 } else {
504 tangent = NR::Point (0,0);
505 }
506 }
507 g_free(end_otp);
508 }
509 g_free(start_otp);
510 }
511 }
513 double rotation = atan2(tangent[1], tangent[0]);
514 for (int glyph_index = _characters[char_index].in_glyph ; glyph_index < next_cluster_glyph_index ; glyph_index++) {
515 double tangent_shift = -cluster_width * 0.5 + _glyphs[glyph_index].x - (_characters[char_index].x + span.x_start);
516 double normal_shift = _glyphs[glyph_index].y;
517 if (span.direction == RIGHT_TO_LEFT)
518 tangent_shift += cluster_width;
519 _glyphs[glyph_index].x = midpoint[0] - span.chunk(this).left_x + tangent[0] * tangent_shift - tangent[1] * normal_shift;
520 _glyphs[glyph_index].y = midpoint[1] - _lines.front().baseline_y + tangent[1] * tangent_shift + tangent[0] * normal_shift;
521 _glyphs[glyph_index].rotation += rotation;
522 }
523 } else { // outside the bounds of the path: hide the glyphs
524 _characters[char_index].in_glyph = -1;
525 }
526 g_free(midpoint_otp);
528 char_index = next_cluster_char_index;
529 }
531 for (unsigned span_index = 0 ; span_index < _spans.size() ; span_index++) {
532 _spans[span_index].x_start += offset;
533 _spans[span_index].x_end += offset;
534 }
536 _path_fitted = &path;
537 }
539 SPCurve *Layout::convertToCurves(iterator const &from_glyph, iterator const &to_glyph) const
540 {
541 GSList *cc = NULL;
543 for (int glyph_index = from_glyph._glyph_index ; glyph_index < to_glyph._glyph_index ; glyph_index++) {
544 NR::Matrix glyph_matrix;
545 Span const &span = _glyphs[glyph_index].span(this);
546 _getGlyphTransformMatrix(glyph_index, &glyph_matrix);
548 Geom::PathVector const * pathv = span.font->PathVector(_glyphs[glyph_index].glyph);
549 if (pathv) {
550 Geom::PathVector pathv_trans = (*pathv) * to_2geom(glyph_matrix);
551 SPCurve *c = new SPCurve(pathv_trans);
552 if (c) cc = g_slist_prepend(cc, c);
553 }
554 }
555 cc = g_slist_reverse(cc);
557 SPCurve *curve;
558 if ( cc ) {
559 curve = SPCurve::concat(cc);
560 } else {
561 curve = new SPCurve();
562 }
564 while (cc) {
565 /* fixme: This is dangerous, as we are mixing art_alloc and g_new */
566 reinterpret_cast<SPCurve *>(cc->data)->unref();
567 cc = g_slist_remove(cc, cc->data);
568 }
570 return curve;
571 }
573 void Layout::transform(NR::Matrix const &transform)
574 {
575 // this is all massively oversimplified
576 // I can't actually think of anybody who'll want to use it at the moment, so it'll stay simple
577 for (unsigned glyph_index = 0 ; glyph_index < _glyphs.size() ; glyph_index++) {
578 NR::Point point(_glyphs[glyph_index].x, _glyphs[glyph_index].y);
579 point *= transform;
580 _glyphs[glyph_index].x = point[0];
581 _glyphs[glyph_index].y = point[1];
582 }
583 }
585 }//namespace Text
586 }//namespace Inkscape
589 /*
590 Local Variables:
591 mode:c++
592 c-file-style:"stroustrup"
593 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
594 indent-tabs-mode:nil
595 fill-column:99
596 End:
597 */
598 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :