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 obj_bounds = TransformToQuadChild(m_objects.bounds[object_id], type);
136 if (obj_bounds.x < 0)
138 obj_bounds.w += obj_bounds.x;
141 if (obj_bounds.y < 0)
143 obj_bounds.h += obj_bounds.y;
146 if (obj_bounds.x + obj_bounds.w > 1)
148 obj_bounds.w += (1 - (obj_bounds.x + obj_bounds.w));
150 if (obj_bounds.y + obj_bounds.h > 1)
152 obj_bounds.h += (1 - (obj_bounds.y + obj_bounds.h));
154 Rect child_node_bounds = TransformFromQuadChild(obj_bounds, type);
155 Rect clip_bezier_bounds = TransformRectCoordinates(m_objects.bounds[object_id], child_node_bounds);
156 std::vector<Bezier> new_curves = Bezier(m_objects.beziers[m_objects.data_indices[object_id]], child_node_bounds).ClipToRectangle(clip_bezier_bounds);
157 for (size_t i = 0; i < new_curves.size(); ++i)
159 Rect new_bounds = TransformToQuadChild(m_objects.bounds[object_id], type);
160 //new_bounds = TransformToQuadChild(new_curves[i].SolveBounds(), type);
161 //Bezier new_curve_data = new_curves[i].ToRelative(new_bounds);
162 unsigned index = AddBezierData(new_curves[i]);
163 m_objects.bounds.push_back(new_bounds);
164 m_objects.types.push_back(BEZIER);
165 m_objects.data_indices.push_back(index);
167 return new_curves.size();
170 Debug("Adding %s -> %s", m_objects.bounds[object_id].Str().c_str(), TransformToQuadChild(m_objects.bounds[object_id], type).Str().c_str());
171 m_objects.bounds.push_back(TransformToQuadChild(m_objects.bounds[object_id], type));
172 m_objects.types.push_back(m_objects.types[object_id]);
173 m_objects.data_indices.push_back(m_objects.data_indices[object_id]);
178 QuadTreeIndex Document::GenQuadChild(QuadTreeIndex parent, QuadTreeNodeChildren type)
180 QuadTreeIndex new_index = m_quadtree.nodes.size();
181 m_quadtree.nodes.push_back(QuadTreeNode{QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, parent, type, 0, 0});
183 m_quadtree.nodes[new_index].object_begin = m_objects.bounds.size();
184 for (unsigned i = m_quadtree.nodes[parent].object_begin; i < m_quadtree.nodes[parent].object_end; ++i)
186 if (IntersectsQuadChild(m_objects.bounds[i], type))
188 m_count += ClipObjectToQuadChild(i, type);
191 m_quadtree.nodes[new_index].object_end = m_objects.bounds.size();
195 m_quadtree.nodes[parent].top_left = new_index;
198 m_quadtree.nodes[parent].top_right = new_index;
200 case QTC_BOTTOM_LEFT:
201 m_quadtree.nodes[parent].bottom_left = new_index;
203 case QTC_BOTTOM_RIGHT:
204 m_quadtree.nodes[parent].bottom_right = new_index;
207 Fatal("Tried to add a QuadTree child of invalid type!");
212 // Reparent a quadtree node, making it the "type" child of a new node.
213 QuadTreeIndex Document::GenQuadParent(QuadTreeIndex child, QuadTreeNodeChildren type)
215 QuadTreeIndex new_index = m_quadtree.nodes.size();
216 m_quadtree.nodes.push_back(QuadTreeNode{QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, -1, QTC_UNKNOWN, 0, 0});
218 m_quadtree.nodes[new_index].object_begin = m_objects.bounds.size();
219 for (unsigned i = m_quadtree.nodes[child].object_begin; i < m_quadtree.nodes[child].object_end; ++i)
221 m_objects.bounds.push_back(TransformFromQuadChild(m_objects.bounds[i], type));
222 m_objects.types.push_back(m_objects.types[i]);
223 m_objects.data_indices.push_back(m_objects.data_indices[i]);
226 m_quadtree.nodes[new_index].object_end = m_objects.bounds.size();
230 m_quadtree.nodes[new_index].top_left = child;
233 m_quadtree.nodes[new_index].top_right = child;
235 case QTC_BOTTOM_LEFT:
236 m_quadtree.nodes[new_index].bottom_left = child;
238 case QTC_BOTTOM_RIGHT:
239 m_quadtree.nodes[new_index].bottom_right = child;
242 Fatal("Tried to add a QuadTree child of invalid type!");
249 void Document::Load(const string & filename)
251 m_objects.bounds.clear();
255 Debug("Loaded empty document.");
258 Debug("Loading document from file \"%s\"", filename.c_str());
259 FILE * file = fopen(filename.c_str(), "r");
261 Fatal("Couldn't open file \"%s\"", filename.c_str(), strerror(errno));
265 DocChunkTypes chunk_type;
267 while (ReadChunkHeader(file, chunk_type, chunk_size))
272 read = fread(&m_count, sizeof(m_count), 1, file);
274 Fatal("Failed to read number of objects!");
275 Debug("Number of objects: %u", ObjectCount());
278 Debug("Object types...");
279 LoadStructVector<ObjectType>(file, chunk_size/sizeof(ObjectType), m_objects.types);
282 Debug("Object bounds...");
283 LoadStructVector<Rect>(file, chunk_size/sizeof(Rect), m_objects.bounds);
286 Debug("Object data indices...");
287 LoadStructVector<unsigned>(file, chunk_size/sizeof(unsigned), m_objects.data_indices);
290 Debug("Bezier data...");
291 LoadStructVector<Bezier>(file, chunk_size/sizeof(Bezier), m_objects.beziers);
295 Debug("Path data...");
296 Warn("Not handled because lazy");
300 Debug("Successfully loaded %u objects from \"%s\"", ObjectCount(), filename.c_str());
301 #ifndef QUADTREE_DISABLED
302 if (m_quadtree.root_id == QUADTREE_EMPTY)
309 unsigned Document::AddPath(unsigned start_index, unsigned end_index, const Colour & fill)
311 Path path(m_objects, start_index, end_index, fill);
312 unsigned data_index = AddPathData(path);
313 Rect bounds = path.SolveBounds(m_objects);
314 unsigned result = Add(PATH, bounds,data_index);
319 * Add a Bezier using Absolute coords
321 unsigned Document::AddBezier(const Bezier & bezier)
323 Rect bounds = bezier.SolveBounds();
324 Bezier data = bezier.ToRelative(bounds); // Relative
325 if (data.ToAbsolute(bounds) != bezier)
327 Error("%s != %s", data.ToAbsolute(Rect(0,0,1,1)).Str().c_str(),
328 bezier.Str().c_str());
329 Fatal("ToAbsolute on ToRelative does not give original Bezier");
331 unsigned index = AddBezierData(data);
332 return Add(BEZIER, bounds, index);
335 unsigned Document::Add(ObjectType type, const Rect & bounds, unsigned data_index)
337 m_objects.types.push_back(type);
338 m_objects.bounds.push_back(bounds);
339 m_objects.data_indices.push_back(data_index);
340 return (m_count++); // Why can't we just use the size of types or something?
343 unsigned Document::AddBezierData(const Bezier & bezier)
345 m_objects.beziers.push_back(bezier);
346 return m_objects.beziers.size()-1;
349 unsigned Document::AddPathData(const Path & path)
351 m_objects.paths.push_back(path);
352 return m_objects.paths.size()-1;
355 void Document::DebugDumpObjects()
357 Debug("Objects for Document %p are:", this);
358 for (unsigned id = 0; id < ObjectCount(); ++id)
360 Debug("%u. \tType: %u\tBounds: %s", id, m_objects.types[id], m_objects.bounds[id].Str().c_str());
364 bool Document::operator==(const Document & equ) const
366 return (ObjectCount() == equ.ObjectCount()
367 && memcmp(m_objects.bounds.data(), equ.m_objects.bounds.data(), ObjectCount() * sizeof(Rect)) == 0
368 && memcmp(m_objects.data_indices.data(), equ.m_objects.data_indices.data(), ObjectCount() * sizeof(unsigned)) == 0
369 && memcmp(m_objects.beziers.data(), equ.m_objects.beziers.data(), m_objects.beziers.size() * sizeof(Bezier)) == 0);
374 // Behold my amazing tokenizing abilities
375 static string & GetToken(const string & d, string & token, unsigned & i, const string & delims = "()[],{}<>;:=")
378 while (i < d.size() && iswspace(d[i]))
385 if (iswspace(d[i]) || strchr(delims.c_str(),d[i]) != NULL)
387 if (token.size() == 0 && !iswspace(d[i]))
395 //Debug("Got token \"%s\"", token.c_str());
399 static void GetXYPair(const string & d, Real & x, Real & y, unsigned & i,const string & delims = "()[],{}<>;:=")
402 while (GetToken(d, token, i, delims) == ",");
403 x = strtod(token.c_str(),NULL);
404 if (GetToken(d, token, i, delims) != ",")
406 Fatal("Expected \",\" seperating x,y pair");
408 y = strtod(GetToken(d, token, i, delims).c_str(),NULL);
411 static bool GetKeyValuePair(const string & d, string & key, string & value, unsigned & i, const string & delims = "()[],{}<>;:=")
415 while (GetToken(d, token, i, delims) == ":" || token == ";");
417 if (GetToken(d, token, i, delims) != ":")
419 Error("Expected \":\" seperating key:value pair");
423 GetToken(d, value, i, delims);
427 static void TransformXYPair(Real & x, Real & y, const SVGMatrix & transform)
430 x = transform.a * x + transform.c * y + transform.e;
431 y = transform.b * x0 + transform.d * y + transform.f;
434 void Document::ParseSVGTransform(const string & s, SVGMatrix & transform)
436 //Debug("Parsing transform %s", s.c_str());
443 GetToken(s, command, i);
444 if (command == "," || command == "" || command == ":")
447 GetToken(s, command, i);
451 //Debug("Token is \"%s\"", command.c_str());
453 SVGMatrix delta = {1,0,0,0,1,0};
456 assert(GetToken(s,token, i) == "(");
457 if (command == "translate")
459 GetXYPair(s, delta.e, delta.f, i);
460 assert(GetToken(s,token, i) == ")");
462 else if (command == "matrix")
464 GetXYPair(s, delta.a, delta.b,i);
465 GetXYPair(s, delta.c, delta.d,i);
466 GetXYPair(s, delta.e, delta.f,i);
467 assert(GetToken(s,token, i) == ")");
469 else if (command == "scale")
471 delta.a = (strtod(GetToken(s,token,i).c_str(), NULL));
472 GetToken(s, token, i);
475 delta.d = (strtod(GetToken(s,token,i).c_str(), NULL));
476 assert(GetToken(s, token, i) == ")");
481 assert(token == ")");
487 Warn("Unrecognised transform \"%s\", using identity", command.c_str());
490 //Debug("Old transform is {%f,%f,%f,%f,%f,%f}", transform.a, transform.b, transform.c, transform.d,transform.e,transform.f);
491 //Debug("Delta transform is {%f,%f,%f,%f,%f,%f}", delta.a, delta.b, delta.c, delta.d,delta.e,delta.f);
493 SVGMatrix old(transform);
494 transform.a = old.a * delta.a + old.c * delta.b;
495 transform.c = old.a * delta.c + old.c * delta.d;
496 transform.e = old.a * delta.e + old.c * delta.f + old.e;
498 transform.b = old.b * delta.a + old.d * delta.b;
499 transform.d = old.b * delta.c + old.d * delta.d;
500 transform.f = old.b * delta.e + old.d * delta.f + old.f;
502 //Debug("New transform is {%f,%f,%f,%f,%f,%f}", transform.a, transform.b, transform.c, transform.d,transform.e,transform.f);
506 void Document::ParseSVGNode(pugi::xml_node & root, SVGMatrix & parent_transform)
508 //Debug("Parse node <%s>", root.name());
511 for (pugi::xml_node child = root.first_child(); child; child = child.next_sibling())
513 SVGMatrix transform(parent_transform);
514 pugi::xml_attribute attrib_trans = child.attribute("transform");
515 if (!attrib_trans.empty())
517 ParseSVGTransform(attrib_trans.as_string(), transform);
522 if (strcmp(child.name(), "svg") == 0 || strcmp(child.name(),"g") == 0
523 || strcmp(child.name(), "group") == 0)
526 ParseSVGNode(child, transform);
529 else if (strcmp(child.name(), "path") == 0)
531 string d = child.attribute("d").as_string();
532 //Debug("Path data attribute is \"%s\"", d.c_str());
534 pair<unsigned, unsigned> range = ParseSVGPathData(d, transform, closed);
538 string colour_str("");
539 map<string, string> style;
540 if (child.attribute("style"))
542 ParseSVGStyleData(child.attribute("style").as_string(), style);
545 // Determine shading colour
546 if (child.attribute("fill"))
548 colour_str = child.attribute("fill").as_string();
550 else if (style.find("fill") != style.end())
552 colour_str = style["fill"];
554 if (colour_str == "red")
556 else if (colour_str == "blue")
558 else if (colour_str == "green")
560 else if (colour_str == "black")
562 else if (colour_str == "white")
564 else if (colour_str.size() == 7 && colour_str[0] == '#')
566 Debug("Parse colour string: \"%s\"", colour_str.c_str());
567 char comp[2] = {colour_str[1], colour_str[2]};
568 c.r = Real(strtoul(comp, NULL, 16))/Real(255);
569 comp[0] = colour_str[3]; comp[1] = colour_str[4];
570 c.g = Real(strtoul(comp, NULL, 16))/Real(255);
571 comp[0] = colour_str[5]; comp[1] = colour_str[6];
572 c.b = Real(strtoul(comp, NULL, 16))/Real(255);
574 Debug("Colour is: %f, %f, %f, %f", Float(c.r), Float(c.g), Float(c.b), Float(c.a));
577 // Determin shading alpha
578 if (child.attribute("fill-opacity"))
580 c.a = child.attribute("fill-opacity").as_float();
582 else if (style.find("fill-opacity") != style.end())
584 c.a = strtod(style["fill-opacity"].c_str(), NULL);
587 Debug("fill-opacity is %f", Float(c.a));
588 AddPath(range.first, range.second, c);
592 else if (strcmp(child.name(), "line") == 0)
594 Real x0(child.attribute("x1").as_float());
595 Real y0(child.attribute("y1").as_float());
596 Real x1(child.attribute("x2").as_float());
597 Real y1(child.attribute("y2").as_float());
598 TransformXYPair(x0,y0,transform);
599 TransformXYPair(x1,y1,transform);
600 AddBezier(Bezier(x0,y0,x1,y1,x1,y1,x1,y1));
602 else if (strcmp(child.name(), "rect") == 0)
605 const char * attrib_names[] = {"x", "y", "width", "height"};
606 for (size_t i = 0; i < 4; ++i)
607 coords[i] = child.attribute(attrib_names[i]).as_float();
609 Real x2(coords[0]+coords[2]);
610 Real y2(coords[1]+coords[3]);
611 TransformXYPair(coords[0],coords[1],transform); // x, y, transform
612 TransformXYPair(x2,y2,transform);
613 coords[2] = x2 - coords[0];
614 coords[3] = y2 - coords[1];
616 bool outline = !(child.attribute("fill") && strcmp(child.attribute("fill").as_string(),"none") != 0);
617 Add(outline?RECT_OUTLINE:RECT_FILLED, Rect(coords[0], coords[1], coords[2], coords[3]),0);
619 else if (strcmp(child.name(), "circle") == 0)
621 Real cx = child.attribute("cx").as_float();
622 Real cy = child.attribute("cy").as_float();
623 Real r = child.attribute("r").as_float();
627 TransformXYPair(x,y,transform);
628 Real w = Real(2)*r*transform.a; // width scales
629 Real h = Real(2)*r*transform.d; // height scales
633 Add(CIRCLE_FILLED, rect,0);
634 Debug("Added Circle %s", rect.Str().c_str());
636 else if (strcmp(child.name(), "text") == 0)
638 Real x = child.attribute("x").as_float();
639 Real y = child.attribute("y").as_float();
640 TransformXYPair(x,y,transform);
641 Debug("Add text \"%s\"", child.child_value());
642 AddText(child.child_value(), 0.05, x, y);
647 void Document::ParseSVGStyleData(const string & style, map<string, string> & results)
652 while (i < style.size() && GetKeyValuePair(style, key, value, i))
654 results[key] = value;
659 * Parse an SVG string into a rectangle
661 void Document::ParseSVG(const string & input, const Rect & bounds)
663 using namespace pugi;
665 xml_document doc_xml;
666 xml_parse_result result = doc_xml.load(input.c_str());
669 Error("Couldn't parse SVG input - %s", result.description());
671 Debug("Loaded XML - %s", result.description());
672 SVGMatrix transform = {bounds.w, 0,bounds.x, 0,bounds.h,bounds.y};
673 ParseSVGNode(doc_xml, transform);
677 * Load an SVG into a rectangle
679 void Document::LoadSVG(const string & filename, const Rect & bounds)
681 using namespace pugi;
683 xml_document doc_xml;
684 ifstream input(filename.c_str(), ios_base::in);
685 xml_parse_result result = doc_xml.load(input);
688 Error("Couldn't load \"%s\" - %s", filename.c_str(), result.description());
690 Debug("Loaded XML - %s", result.description());
694 SVGMatrix transform = {bounds.w, 0,bounds.x, 0,bounds.h,bounds.y};
695 ParseSVGNode(doc_xml, transform);
700 // Fear the wrath of the tokenizing svg data
701 // Seriously this isn't really very DOM-like at all is it?
702 pair<unsigned, unsigned> Document::ParseSVGPathData(const string & d, const SVGMatrix & transform, bool & closed)
705 Real x[4] = {0,0,0,0};
706 Real y[4] = {0,0,0,0};
720 static string delims("()[],{}<>;:=LlHhVvmMqQzZcC");
722 pair<unsigned, unsigned> range(m_count, m_count);
724 while (i < d.size() && GetToken(d, token, i, delims).size() > 0)
726 if (isalpha(token[0]))
735 bool relative = islower(command[0]);
737 if (command == "m" || command == "M")
739 //Debug("Construct moveto command");
740 Real dx = Real(strtod(GetToken(d,token,i,delims).c_str(),NULL));
741 assert(GetToken(d,token,i,delims) == ",");
742 Real dy = Real(strtod(GetToken(d,token,i,delims).c_str(),NULL));
744 x[0] = (relative) ? x[0] + dx : dx;
745 y[0] = (relative) ? y[0] + dy : dy;
749 //Debug("mmoveto %f,%f", Float(x[0]),Float(y[0]));
750 command = (command == "m") ? "l" : "L";
752 else if (command == "c" || command == "C" || command == "q" || command == "Q")
754 //Debug("Construct curveto command");
755 Real dx = Real(strtod(GetToken(d,token,i,delims).c_str(),NULL));
756 assert(GetToken(d,token,i,delims) == ",");
757 Real dy = Real(strtod(GetToken(d,token,i,delims).c_str(),NULL));
759 x[1] = (relative) ? x[0] + dx : dx;
760 y[1] = (relative) ? y[0] + dy : dy;
762 dx = Real(strtod(GetToken(d,token,i,delims).c_str(),NULL));
763 assert(GetToken(d,token,i,delims) == ",");
764 dy = Real(strtod(GetToken(d,token,i,delims).c_str(),NULL));
766 x[2] = (relative) ? x[0] + dx : dx;
767 y[2] = (relative) ? y[0] + dy : dy;
769 if (command != "q" && command != "Q")
771 dx = Real(strtod(GetToken(d,token,i,delims).c_str(),NULL));
772 assert(GetToken(d,token,i,delims) == ",");
773 dy = Real(strtod(GetToken(d,token,i,delims).c_str(),NULL));
774 x[3] = (relative) ? x[0] + dx : dx;
775 y[3] = (relative) ? y[0] + dy : dy;
781 Real old_x1(x[1]), old_y1(y[1]);
782 x[1] = x[0] + Real(2) * (old_x1 - x[0])/ Real(3);
783 y[1] = y[0] + Real(2) * (old_y1 - y[0])/ Real(3);
784 x[2] = x[3] + Real(2) * (old_x1 - x[3])/ Real(3);
785 y[2] = y[3] + Real(2) * (old_y1 - y[3])/ Real(3);
790 for (int j = 0; j < 4; ++j)
791 TransformXYPair(x[j],y[j], transform);
793 range.second = AddBezier(Bezier(x[0],y[0],x[1],y[1],x[2],y[2],x[3],y[3]));
795 //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]));
802 else if (command == "l" || command == "L" || command == "h" || command == "H" || command == "v" || command == "V")
804 //Debug("Construct lineto command, relative %d", relative);
806 Real dx = Real(strtod(GetToken(d,token,i,delims).c_str(),NULL));
808 if (command == "l" || command == "L")
810 assert(GetToken(d,token,i,delims) == ",");
811 dy = Real(strtod(GetToken(d,token,i,delims).c_str(),NULL));
813 else if (command == "v" || command == "V")
818 x[1] = (relative) ? x[0] + dx : dx;
819 y[1] = (relative) ? y[0] + dy : dy;
820 if (command == "v" || command == "V")
824 else if (command == "h" || command == "H")
832 TransformXYPair(x[0],y[0],transform);
833 TransformXYPair(x[1],y[1],transform);
836 range.second = AddBezier(Bezier(x[0],y[0],x[1],y[1],x[1],y[1],x[1],y[1]));
838 //Debug("[%u] lineto %f,%f %f,%f", index, Float(x[0]),Float(y[0]),Float(x[1]),Float(y[1]));
844 else if (command == "z" || command == "Z")
846 //Debug("Construct returnto command");
856 for (int j = 0; j < 4; ++j)
857 TransformXYPair(x[j],y[j], transform);
859 range.second = AddBezier(Bezier(x[0],y[0],x[1],y[1],x[2],y[2],x[3],y[3]));
860 //Debug("[%u] returnto %f,%f %f,%f", index, Float(x[0]),Float(y[0]),Float(x[1]),Float(y[1]));
869 Warn("Unrecognised command \"%s\", set to \"m\"", command.c_str());
884 void Document::SetFont(const string & font_filename)
886 if (m_font_data != NULL)
891 FILE *font_file = fopen(font_filename.c_str(), "rb");
892 fseek(font_file, 0, SEEK_END);
893 size_t font_file_size = ftell(font_file);
894 fseek(font_file, 0, SEEK_SET);
895 m_font_data = (unsigned char*)malloc(font_file_size);
896 size_t read = fread(m_font_data, 1, font_file_size, font_file);
897 if (read != font_file_size)
899 Fatal("Failed to read font data from \"%s\" - Read %u bytes expected %u - %s", font_filename.c_str(), read, font_file_size, strerror(errno));
902 stbtt_InitFont(&m_font, m_font_data, 0);
905 void Document::AddText(const string & text, Real scale, Real x, Real y)
907 if (m_font_data == NULL)
909 Warn("No font loaded");
915 int ascent = 0, descent = 0, line_gap = 0;
916 stbtt_GetFontVMetrics(&m_font, &ascent, &descent, &line_gap);
917 float font_scale = scale / (float)(ascent - descent);
918 Real y_advance = Real(font_scale) * Real(ascent - descent + line_gap);
919 for (unsigned i = 0; i < text.size(); ++i)
926 if (!isprint(text[i]))
929 int advance_width = 0, left_side_bearing = 0, kerning = 0;
930 stbtt_GetCodepointHMetrics(&m_font, text[i], &advance_width, &left_side_bearing);
933 kerning = stbtt_GetCodepointKernAdvance(&m_font, text[i-1], text[i]);
935 x += Real(font_scale) * Real(kerning);
936 AddFontGlyphAtPoint(&m_font, text[i], font_scale, x, y);
937 x += Real(font_scale) * Real(advance_width);
941 void Document::AddFontGlyphAtPoint(stbtt_fontinfo *font, int character, Real scale, Real x, Real y)
943 int glyph_index = stbtt_FindGlyphIndex(font, character);
945 // Check if there is actully a glyph to render.
946 if (stbtt_IsGlyphEmpty(font, glyph_index))
951 stbtt_vertex *instructions;
952 int num_instructions = stbtt_GetGlyphShape(font, glyph_index, &instructions);
954 Real current_x(0), current_y(0);
955 unsigned start_index = m_count;
956 unsigned end_index = m_count;
957 for (int i = 0; i < num_instructions; ++i)
959 // TTF uses 16-bit signed ints for coordinates:
960 // with the y-axis inverted compared to us.
961 // Convert and scale any data.
962 Real inst_x = Real(instructions[i].x)*scale;
963 Real inst_y = Real(instructions[i].y)*-scale;
964 Real inst_cx = Real(instructions[i].cx)*scale;
965 Real inst_cy = Real(instructions[i].cy)*-scale;
966 Real old_x(current_x), old_y(current_y);
970 switch(instructions[i].type)
977 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));
979 // Quadratic Bezier To:
981 // Quadratic -> Cubic:
982 // - Endpoints are the same.
983 // - cubic1 = quad0+(2/3)*(quad1-quad0)
984 // - cubic2 = quad2+(2/3)*(quad1-quad2)
985 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,
986 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));
991 if (start_index < m_count && end_index < m_count)
993 AddPath(start_index, end_index);
995 Debug("Added Glyph \"%c\" at %f %f, scale %f", (char)character, Float(x), Float(y), Float(scale));
997 stbtt_FreeShape(font, instructions);