6 #include "../contrib/pugixml-1.4/src/pugixml.cpp"
8 #include "stb_truetype.h"
13 //TODO: Make this work for variable sized Reals
15 // Loads an std::vector<T> of size num_elements from a file.
17 static void LoadStructVector(FILE *src_file, size_t num_elems, std::vector<T>& dest)
19 size_t structsread = 0;
20 dest.resize(num_elems);
21 structsread = fread(dest.data(), sizeof(T), num_elems, src_file);
22 if (structsread != num_elems)
23 Fatal("Only read %u structs (expected %u)!", structsread, num_elems);
26 // Saves an std::vector<T> to a file. Size must be saves separately.
28 static void SaveStructVector(FILE *dst_file, std::vector<T>& src)
31 written = fwrite(src.data(), sizeof(T), src.size(), dst_file);
32 if (written != src.size())
33 Fatal("Only wrote %u structs (expected %u)!", written, src.size());
36 static void WriteChunkHeader(FILE *dst_file, DocChunkTypes type, uint32_t size)
39 written = fwrite(&type, sizeof(type), 1, dst_file);
41 Fatal("Could not write Chunk header! (ID)");
42 written = fwrite(&size, sizeof(size), 1, dst_file);
44 Fatal("Could not write Chunk header (size)!");
47 static bool ReadChunkHeader(FILE *src_file, DocChunkTypes& type, uint32_t& size)
49 if (fread(&type, sizeof(DocChunkTypes), 1, src_file) != 1)
51 if (fread(&size, sizeof(uint32_t), 1, src_file) != 1)
56 void Document::Save(const string & filename)
58 Debug("Saving document to file \"%s\"...", filename.c_str());
59 FILE * file = fopen(filename.c_str(), "w");
61 Fatal("Couldn't open file \"%s\" - %s", filename.c_str(), strerror(errno));
64 Debug("Number of objects (%u)...", ObjectCount());
65 WriteChunkHeader(file, CT_NUMOBJS, sizeof(m_count));
66 written = fwrite(&m_count, sizeof(m_count), 1, file);
68 Fatal("Failed to write number of objects!");
70 Debug("Object types...");
71 WriteChunkHeader(file, CT_OBJTYPES, m_objects.types.size() * sizeof(ObjectType));
72 SaveStructVector<ObjectType>(file, m_objects.types);
74 Debug("Object bounds...");
75 WriteChunkHeader(file, CT_OBJBOUNDS, m_objects.bounds.size() * sizeof(Rect));
76 SaveStructVector<Rect>(file, m_objects.bounds);
78 Debug("Object data indices...");
79 WriteChunkHeader(file, CT_OBJINDICES, m_objects.data_indices.size() * sizeof(unsigned));
80 SaveStructVector<unsigned>(file, m_objects.data_indices);
82 Debug("Bezier data...");
83 WriteChunkHeader(file, CT_OBJBEZIERS, m_objects.beziers.size() * sizeof(uint8_t));
84 SaveStructVector<Bezier>(file, m_objects.beziers);
86 int err = fclose(file);
88 Fatal("Failed to close file \"%s\" - %s", filename.c_str(), strerror(err));
90 Debug("Successfully saved %u objects to \"%s\"", ObjectCount(), filename.c_str());
93 #ifndef QUADTREE_DISABLED
95 void Document::GenBaseQuadtree()
97 m_quadtree.nodes.push_back(QuadTreeNode{QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, QTC_UNKNOWN, 0, ObjectCount()});
98 m_quadtree.root_id = 0;
99 GenQuadChild(0, QTC_TOP_LEFT);
102 int Document::ClipObjectToQuadChild(int object_id, QuadTreeNodeChildren type)
104 switch (m_objects.types[object_id])
109 Rect obj_bounds = TransformToQuadChild(m_objects.bounds[object_id], type);
110 if (obj_bounds.x < 0)
112 obj_bounds.w += obj_bounds.x;
115 if (obj_bounds.y < 0)
117 obj_bounds.h += obj_bounds.y;
120 if (obj_bounds.x + obj_bounds.w > 1)
122 obj_bounds.w += (1 - (obj_bounds.x + obj_bounds.w));
124 if (obj_bounds.y + obj_bounds.h > 1)
126 obj_bounds.h += (1 - (obj_bounds.y + obj_bounds.h));
128 m_objects.bounds.push_back(obj_bounds);
129 m_objects.types.push_back(m_objects.types[object_id]);
130 m_objects.data_indices.push_back(m_objects.data_indices[object_id]);
135 Rect child_node_bounds = TransformFromQuadChild({0,0,1,1}, type);
136 std::vector<Bezier> new_curves = m_objects.beziers[m_objects.data_indices[object_id]].ClipToRectangle(child_node_bounds);
137 Rect obj_bounds = TransformToQuadChild(m_objects.bounds[object_id], type);
138 for (size_t i = 0; i < new_curves.size(); ++i)
140 unsigned index = AddBezierData(new_curves[i]);
141 m_objects.bounds.push_back(obj_bounds);
142 m_objects.types.push_back(BEZIER);
143 m_objects.data_indices.push_back(index);
145 return new_curves.size();
148 Debug("Adding %s -> %s", m_objects.bounds[object_id].Str().c_str(), TransformToQuadChild(m_objects.bounds[object_id], type).Str().c_str());
149 m_objects.bounds.push_back(TransformToQuadChild(m_objects.bounds[object_id], type));
150 m_objects.types.push_back(m_objects.types[object_id]);
151 m_objects.data_indices.push_back(m_objects.data_indices[object_id]);
156 QuadTreeIndex Document::GenQuadChild(QuadTreeIndex parent, QuadTreeNodeChildren type)
158 QuadTreeIndex new_index = m_quadtree.nodes.size();
159 m_quadtree.nodes.push_back(QuadTreeNode{QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, parent, type, 0, 0});
161 m_quadtree.nodes[new_index].object_begin = m_objects.bounds.size();
162 for (unsigned i = m_quadtree.nodes[parent].object_begin; i < m_quadtree.nodes[parent].object_end; ++i)
164 if (IntersectsQuadChild(m_objects.bounds[i], type))
166 m_count += ClipObjectToQuadChild(i, type);
169 m_quadtree.nodes[new_index].object_end = m_objects.bounds.size();
173 m_quadtree.nodes[parent].top_left = new_index;
176 m_quadtree.nodes[parent].top_right = new_index;
178 case QTC_BOTTOM_LEFT:
179 m_quadtree.nodes[parent].bottom_left = new_index;
181 case QTC_BOTTOM_RIGHT:
182 m_quadtree.nodes[parent].bottom_right = new_index;
185 Fatal("Tried to add a QuadTree child of invalid type!");
190 // Reparent a quadtree node, making it the "type" child of a new node.
191 QuadTreeIndex Document::GenQuadParent(QuadTreeIndex child, QuadTreeNodeChildren type)
193 QuadTreeIndex new_index = m_quadtree.nodes.size();
194 m_quadtree.nodes.push_back(QuadTreeNode{QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, -1, QTC_UNKNOWN, 0, 0});
196 m_quadtree.nodes[new_index].object_begin = m_objects.bounds.size();
197 for (unsigned i = m_quadtree.nodes[child].object_begin; i < m_quadtree.nodes[child].object_end; ++i)
199 m_objects.bounds.push_back(TransformFromQuadChild(m_objects.bounds[i], type));
200 m_objects.types.push_back(m_objects.types[i]);
201 m_objects.data_indices.push_back(m_objects.data_indices[i]);
204 m_quadtree.nodes[new_index].object_end = m_objects.bounds.size();
208 m_quadtree.nodes[new_index].top_left = child;
211 m_quadtree.nodes[new_index].top_right = child;
213 case QTC_BOTTOM_LEFT:
214 m_quadtree.nodes[new_index].bottom_left = child;
216 case QTC_BOTTOM_RIGHT:
217 m_quadtree.nodes[new_index].bottom_right = child;
220 Fatal("Tried to add a QuadTree child of invalid type!");
227 void Document::Load(const string & filename)
229 m_objects.bounds.clear();
233 Debug("Loaded empty document.");
236 Debug("Loading document from file \"%s\"", filename.c_str());
237 FILE * file = fopen(filename.c_str(), "r");
239 Fatal("Couldn't open file \"%s\"", filename.c_str(), strerror(errno));
243 DocChunkTypes chunk_type;
245 while (ReadChunkHeader(file, chunk_type, chunk_size))
250 read = fread(&m_count, sizeof(m_count), 1, file);
252 Fatal("Failed to read number of objects!");
253 Debug("Number of objects: %u", ObjectCount());
256 Debug("Object types...");
257 LoadStructVector<ObjectType>(file, chunk_size/sizeof(ObjectType), m_objects.types);
260 Debug("Object bounds...");
261 LoadStructVector<Rect>(file, chunk_size/sizeof(Rect), m_objects.bounds);
264 Debug("Object data indices...");
265 LoadStructVector<unsigned>(file, chunk_size/sizeof(unsigned), m_objects.data_indices);
268 Debug("Bezier data...");
269 LoadStructVector<Bezier>(file, chunk_size/sizeof(Bezier), m_objects.beziers);
273 Debug("Group data...");
274 Warn("Not handled because lazy");
278 Debug("Successfully loaded %u objects from \"%s\"", ObjectCount(), filename.c_str());
279 #ifndef QUADTREE_DISABLED
280 if (m_quadtree.root_id == QUADTREE_EMPTY)
287 unsigned Document::AddGroup(unsigned start_index, unsigned end_index)
289 Real xmin = 0; Real ymin = 0;
290 Real xmax = 0; Real ymax = 0;
292 for (unsigned i = start_index; i <= end_index; ++i)
294 Rect & objb = m_objects.bounds[i];
296 if (i == start_index || objb.x < xmin)
298 if (i == start_index || (objb.x+objb.w) > xmax)
299 xmax = (objb.x+objb.w);
301 if (i == start_index || objb.y < ymin)
303 if (i == start_index || (objb.y+objb.h) > ymax)
304 ymax = (objb.y+objb.h);
307 Rect bounds(xmin,ymin, xmax-xmin, ymax-ymin);
308 unsigned result = Add(GROUP, bounds,0);
309 m_objects.groups[m_count-1].first = start_index;
310 m_objects.groups[m_count-1].second = end_index;
315 * Add a Bezier using Absolute coords
317 unsigned Document::AddBezier(const Bezier & bezier)
319 Rect bounds = bezier.SolveBounds();
320 Bezier data = bezier.ToRelative(bounds); // Relative
321 unsigned index = AddBezierData(data);
322 return Add(BEZIER, bounds, index);
325 unsigned Document::Add(ObjectType type, const Rect & bounds, unsigned data_index)
327 m_objects.types.push_back(type);
328 m_objects.bounds.push_back(bounds);
329 m_objects.data_indices.push_back(data_index);
330 m_objects.groups.push_back(pair<unsigned, unsigned>(data_index, data_index));
331 return (m_count++); // Why can't we just use the size of types or something?
334 unsigned Document::AddBezierData(const Bezier & bezier)
336 m_objects.beziers.push_back(bezier);
337 return m_objects.beziers.size()-1;
341 void Document::DebugDumpObjects()
343 Debug("Objects for Document %p are:", this);
344 for (unsigned id = 0; id < ObjectCount(); ++id)
346 Debug("%u. \tType: %u\tBounds: %s", id, m_objects.types[id], m_objects.bounds[id].Str().c_str());
350 bool Document::operator==(const Document & equ) const
352 return (ObjectCount() == equ.ObjectCount()
353 && memcmp(m_objects.bounds.data(), equ.m_objects.bounds.data(), ObjectCount() * sizeof(Rect)) == 0
354 && memcmp(m_objects.data_indices.data(), equ.m_objects.data_indices.data(), ObjectCount() * sizeof(unsigned)) == 0
355 && memcmp(m_objects.beziers.data(), equ.m_objects.beziers.data(), m_objects.beziers.size() * sizeof(Bezier)) == 0);
360 // Behold my amazing tokenizing abilities
361 static string & GetToken(const string & d, string & token, unsigned & i, const string & delims = "()[],{}<>;:=")
364 while (i < d.size() && iswspace(d[i]))
371 if (iswspace(d[i]) || strchr(delims.c_str(),d[i]) != NULL)
373 if (token.size() == 0 && !iswspace(d[i]))
381 //Debug("Got token \"%s\"", token.c_str());
385 static void GetXYPair(const string & d, Real & x, Real & y, unsigned & i,const string & delims = "()[],{}<>;:=")
388 while (GetToken(d, token, i, delims) == ",");
389 x = strtod(token.c_str(),NULL);
390 if (GetToken(d, token, i, delims) != ",")
392 Fatal("Expected \",\" seperating x,y pair");
394 y = strtod(GetToken(d, token, i, delims).c_str(),NULL);
397 static void TransformXYPair(Real & x, Real & y, const SVGMatrix & transform)
400 x = transform.a * x + transform.c * y + transform.e;
401 y = transform.b * x0 + transform.d * y + transform.f;
404 void Document::ParseSVGTransform(const string & s, SVGMatrix & transform)
406 //Debug("Parsing transform %s", s.c_str());
413 GetToken(s, command, i);
414 if (command == "," || command == "" || command == ":")
417 GetToken(s, command, i);
421 //Debug("Token is \"%s\"", command.c_str());
423 SVGMatrix delta = {1,0,0,0,1,0};
426 assert(GetToken(s,token, i) == "(");
427 if (command == "translate")
429 GetXYPair(s, delta.e, delta.f, i);
430 assert(GetToken(s,token, i) == ")");
432 else if (command == "matrix")
434 GetXYPair(s, delta.a, delta.b,i);
435 GetXYPair(s, delta.c, delta.d,i);
436 GetXYPair(s, delta.e, delta.f,i);
437 assert(GetToken(s,token, i) == ")");
439 else if (command == "scale")
441 delta.a = (strtod(GetToken(s,token,i).c_str(), NULL));
442 GetToken(s, token, i);
445 delta.d = (strtod(GetToken(s,token,i).c_str(), NULL));
446 assert(GetToken(s, token, i) == ")");
451 assert(token == ")");
457 Warn("Unrecognised transform \"%s\", using identity", command.c_str());
460 //Debug("Old transform is {%f,%f,%f,%f,%f,%f}", transform.a, transform.b, transform.c, transform.d,transform.e,transform.f);
461 //Debug("Delta transform is {%f,%f,%f,%f,%f,%f}", delta.a, delta.b, delta.c, delta.d,delta.e,delta.f);
463 SVGMatrix old(transform);
464 transform.a = old.a * delta.a + old.c * delta.b;
465 transform.c = old.a * delta.c + old.c * delta.d;
466 transform.e = old.a * delta.e + old.c * delta.f + old.e;
468 transform.b = old.b * delta.a + old.d * delta.b;
469 transform.d = old.b * delta.c + old.d * delta.d;
470 transform.f = old.b * delta.e + old.d * delta.f + old.f;
472 //Debug("New transform is {%f,%f,%f,%f,%f,%f}", transform.a, transform.b, transform.c, transform.d,transform.e,transform.f);
476 void Document::ParseSVGNode(pugi::xml_node & root, SVGMatrix & parent_transform)
478 //Debug("Parse node <%s>", root.name());
481 for (pugi::xml_node child = root.first_child(); child; child = child.next_sibling())
483 SVGMatrix transform(parent_transform);
484 pugi::xml_attribute attrib_trans = child.attribute("transform");
485 if (!attrib_trans.empty())
487 ParseSVGTransform(attrib_trans.as_string(), transform);
490 if (strcmp(child.name(), "svg") == 0 || strcmp(child.name(),"g") == 0
491 || strcmp(child.name(), "group") == 0)
494 ParseSVGNode(child, transform);
497 else if (strcmp(child.name(), "path") == 0)
499 string d = child.attribute("d").as_string();
500 Debug("Path data attribute is \"%s\"", d.c_str());
501 pair<unsigned, unsigned> range = ParseSVGPathData(d, transform);
502 AddGroup(range.first, range.second);
505 else if (strcmp(child.name(), "line") == 0)
507 Real x0(child.attribute("x1").as_float());
508 Real y0(child.attribute("y1").as_float());
509 Real x1(child.attribute("x2").as_float());
510 Real y1(child.attribute("y2").as_float());
511 TransformXYPair(x0,y0,transform);
512 TransformXYPair(x1,y1,transform);
513 AddBezier(Bezier(x0,y0,x1,y1,x1,y1,x1,y1));
515 else if (strcmp(child.name(), "rect") == 0)
518 const char * attrib_names[] = {"x", "y", "width", "height"};
519 for (size_t i = 0; i < 4; ++i)
520 coords[i] = child.attribute(attrib_names[i]).as_float();
522 Real x2(coords[0]+coords[2]);
523 Real y2(coords[1]+coords[3]);
524 TransformXYPair(coords[0],coords[1],transform); // x, y, transform
525 TransformXYPair(x2,y2,transform);
526 coords[2] = x2 - coords[0];
527 coords[3] = y2 - coords[1];
529 bool outline = !(child.attribute("fill") && strcmp(child.attribute("fill").as_string(),"none") != 0);
530 Add(outline?RECT_OUTLINE:RECT_FILLED, Rect(coords[0], coords[1], coords[2], coords[3]),0);
532 else if (strcmp(child.name(), "circle") == 0)
534 Real cx = child.attribute("cx").as_float();
535 Real cy = child.attribute("cy").as_float();
536 Real r = child.attribute("r").as_float();
540 TransformXYPair(x,y,transform);
541 Real w = Real(2)*r*transform.a; // width scales
542 Real h = Real(2)*r*transform.d; // height scales
546 Add(CIRCLE_FILLED, rect,0);
547 Debug("Added Circle %s", rect.Str().c_str());
549 else if (strcmp(child.name(), "text") == 0)
551 Real x = child.attribute("x").as_float();
552 Real y = child.attribute("y").as_float();
553 TransformXYPair(x,y,transform);
554 Debug("Add text \"%s\"", child.child_value());
555 AddText(child.child_value(), 0.05, x, y);
561 * Parse an SVG string into a rectangle
563 void Document::ParseSVG(const string & input, const Rect & bounds)
565 using namespace pugi;
567 xml_document doc_xml;
568 xml_parse_result result = doc_xml.load(input.c_str());
571 Error("Couldn't parse SVG input - %s", result.description());
573 Debug("Loaded XML - %s", result.description());
574 SVGMatrix transform = {bounds.w, 0,bounds.x, 0,bounds.h,bounds.y};
575 ParseSVGNode(doc_xml, transform);
579 * Load an SVG into a rectangle
581 void Document::LoadSVG(const string & filename, const Rect & bounds)
583 using namespace pugi;
585 xml_document doc_xml;
586 ifstream input(filename.c_str(), ios_base::in);
587 xml_parse_result result = doc_xml.load(input);
590 Error("Couldn't load \"%s\" - %s", filename.c_str(), result.description());
592 Debug("Loaded XML - %s", result.description());
596 SVGMatrix transform = {bounds.w, 0,bounds.x, 0,bounds.h,bounds.y};
597 ParseSVGNode(doc_xml, transform);
602 // Fear the wrath of the tokenizing svg data
603 // Seriously this isn't really very DOM-like at all is it?
604 pair<unsigned, unsigned> Document::ParseSVGPathData(const string & d, const SVGMatrix & transform)
606 Real x[4] = {0,0,0,0};
607 Real y[4] = {0,0,0,0};
621 static string delims("()[],{}<>;:=LlHhVvmMqQzZcC");
623 pair<unsigned, unsigned> range(m_count, m_count);
625 while (i < d.size() && GetToken(d, token, i, delims).size() > 0)
627 if (isalpha(token[0]))
636 bool relative = islower(command[0]);
638 if (command == "m" || command == "M")
640 //Debug("Construct moveto command");
641 Real dx = Real(strtod(GetToken(d,token,i,delims).c_str(),NULL));
642 assert(GetToken(d,token,i,delims) == ",");
643 Real dy = Real(strtod(GetToken(d,token,i,delims).c_str(),NULL));
645 x[0] = (relative) ? x[0] + dx : dx;
646 y[0] = (relative) ? y[0] + dy : dy;
650 //Debug("mmoveto %f,%f", Float(x[0]),Float(y[0]));
651 command = (command == "m") ? "l" : "L";
653 else if (command == "c" || command == "C" || command == "q" || command == "Q")
655 //Debug("Construct curveto command");
656 Real dx = Real(strtod(GetToken(d,token,i,delims).c_str(),NULL));
657 assert(GetToken(d,token,i,delims) == ",");
658 Real dy = Real(strtod(GetToken(d,token,i,delims).c_str(),NULL));
660 x[1] = (relative) ? x[0] + dx : dx;
661 y[1] = (relative) ? y[0] + dy : dy;
663 dx = Real(strtod(GetToken(d,token,i,delims).c_str(),NULL));
664 assert(GetToken(d,token,i,delims) == ",");
665 dy = Real(strtod(GetToken(d,token,i,delims).c_str(),NULL));
667 x[2] = (relative) ? x[0] + dx : dx;
668 y[2] = (relative) ? y[0] + dy : dy;
670 if (command != "q" && command != "Q")
672 dx = Real(strtod(GetToken(d,token,i,delims).c_str(),NULL));
673 assert(GetToken(d,token,i,delims) == ",");
674 dy = Real(strtod(GetToken(d,token,i,delims).c_str(),NULL));
675 x[3] = (relative) ? x[0] + dx : dx;
676 y[3] = (relative) ? y[0] + dy : dy;
682 Real old_x1(x[1]), old_y1(y[1]);
683 x[1] = x[0] + Real(2) * (old_x1 - x[0])/ Real(3);
684 y[1] = y[0] + Real(2) * (old_y1 - y[0])/ Real(3);
685 x[2] = x[3] + Real(2) * (old_x1 - x[3])/ Real(3);
686 y[2] = y[3] + Real(2) * (old_y1 - y[3])/ Real(3);
691 for (int j = 0; j < 4; ++j)
692 TransformXYPair(x[j],y[j], transform);
694 range.second = AddBezier(Bezier(x[0],y[0],x[1],y[1],x[2],y[2],x[3],y[3]));
696 //Debug("[%u] curveto %f,%f %f,%f %f,%f", index, Float(x[1]),Float(y[1]),Float(x[2]),Float(y[2]),Float(x[3]),Float(y[3]));
703 else if (command == "l" || command == "L" || command == "h" || command == "H" || command == "v" || command == "V")
705 Debug("Construct lineto command, relative %d", relative);
707 Real dx = Real(strtod(GetToken(d,token,i,delims).c_str(),NULL));
709 if (command == "l" || command == "L")
711 assert(GetToken(d,token,i,delims) == ",");
712 dy = Real(strtod(GetToken(d,token,i,delims).c_str(),NULL));
714 else if (command == "v" || command == "V")
719 x[1] = (relative) ? x[0] + dx : dx;
720 y[1] = (relative) ? y[0] + dy : dy;
721 if (command == "v" || command == "V")
725 else if (command == "h" || command == "H")
733 TransformXYPair(x[0],y[0],transform);
734 TransformXYPair(x[1],y[1],transform);
737 range.second = AddBezier(Bezier(x[0],y[0],x[1],y[1],x[1],y[1],x[1],y[1]));
739 //Debug("[%u] lineto %f,%f %f,%f", index, Float(x[0]),Float(y[0]),Float(x[1]),Float(y[1]));
745 else if (command == "z" || command == "Z")
747 //Debug("Construct returnto command");
757 for (int j = 0; j < 4; ++j)
758 TransformXYPair(x[j],y[j], transform);
760 range.second = AddBezier(Bezier(x[0],y[0],x[1],y[1],x[2],y[2],x[3],y[3]));
761 //Debug("[%u] returnto %f,%f %f,%f", index, Float(x[0]),Float(y[0]),Float(x[1]),Float(y[1]));
769 Warn("Unrecognised command \"%s\", set to \"m\"", command.c_str());
784 void Document::SetFont(const string & font_filename)
786 if (m_font_data != NULL)
791 FILE *font_file = fopen(font_filename.c_str(), "rb");
792 fseek(font_file, 0, SEEK_END);
793 size_t font_file_size = ftell(font_file);
794 fseek(font_file, 0, SEEK_SET);
795 m_font_data = (unsigned char*)malloc(font_file_size);
796 size_t read = fread(m_font_data, 1, font_file_size, font_file);
797 if (read != font_file_size)
799 Fatal("Failed to read font data from \"%s\" - Read %u bytes expected %u - %s", font_filename.c_str(), read, font_file_size, strerror(errno));
802 stbtt_InitFont(&m_font, m_font_data, 0);
805 void Document::AddText(const string & text, Real scale, Real x, Real y)
807 if (m_font_data == NULL)
809 Warn("No font loaded");
815 int ascent = 0, descent = 0, line_gap = 0;
816 stbtt_GetFontVMetrics(&m_font, &ascent, &descent, &line_gap);
817 float font_scale = scale / (float)(ascent - descent);
818 Real y_advance = Real(font_scale) * Real(ascent - descent + line_gap);
819 for (unsigned i = 0; i < text.size(); ++i)
826 if (!isprint(text[i]))
829 int advance_width = 0, left_side_bearing = 0, kerning = 0;
830 stbtt_GetCodepointHMetrics(&m_font, text[i], &advance_width, &left_side_bearing);
833 kerning = stbtt_GetCodepointKernAdvance(&m_font, text[i-1], text[i]);
835 x += Real(font_scale) * Real(kerning);
836 AddFontGlyphAtPoint(&m_font, text[i], font_scale, x, y);
837 x += Real(font_scale) * Real(advance_width);
841 void Document::AddFontGlyphAtPoint(stbtt_fontinfo *font, int character, Real scale, Real x, Real y)
843 int glyph_index = stbtt_FindGlyphIndex(font, character);
845 // Check if there is actully a glyph to render.
846 if (stbtt_IsGlyphEmpty(font, glyph_index))
851 stbtt_vertex *instructions;
852 int num_instructions = stbtt_GetGlyphShape(font, glyph_index, &instructions);
854 Real current_x(0), current_y(0);
855 unsigned start_index = m_count;
856 unsigned end_index = m_count;
857 for (int i = 0; i < num_instructions; ++i)
859 // TTF uses 16-bit signed ints for coordinates:
860 // with the y-axis inverted compared to us.
861 // Convert and scale any data.
862 Real inst_x = Real(instructions[i].x)*scale;
863 Real inst_y = Real(instructions[i].y)*-scale;
864 Real inst_cx = Real(instructions[i].cx)*scale;
865 Real inst_cy = Real(instructions[i].cy)*-scale;
866 Real old_x(current_x), old_y(current_y);
870 switch(instructions[i].type)
877 end_index = AddBezier(Bezier(old_x + x, old_y + y, old_x + x, old_y + y, current_x + x, current_y + y, current_x + x, current_y + y));
879 // Quadratic Bezier To:
881 // Quadratic -> Cubic:
882 // - Endpoints are the same.
883 // - cubic1 = quad0+(2/3)*(quad1-quad0)
884 // - cubic2 = quad2+(2/3)*(quad1-quad2)
885 end_index = AddBezier(Bezier(old_x + x, old_y + y, old_x + Real(2)*(inst_cx-old_x)/Real(3) + x, old_y + Real(2)*(inst_cy-old_y)/Real(3) + y,
886 current_x + Real(2)*(inst_cx-current_x)/Real(3) + x, current_y + Real(2)*(inst_cy-current_y)/Real(3) + y, current_x + x, current_y + y));
891 if (start_index < m_count && end_index < m_count)
893 AddGroup(start_index, end_index);
895 Debug("Added Glyph \"%c\" at %f %f, scale %f", (char)character, Float(x), Float(y), Float(scale));
897 stbtt_FreeShape(font, instructions);