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);
100 GenQuadParent(0, QTC_BOTTOM_RIGHT);
103 QuadTreeIndex Document::GenQuadChild(QuadTreeIndex parent, QuadTreeNodeChildren type)
105 QuadTreeIndex new_index = m_quadtree.nodes.size();
106 m_quadtree.nodes.push_back(QuadTreeNode{QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, parent, type, 0, 0});
108 m_quadtree.nodes[new_index].object_begin = m_objects.bounds.size();
109 for (unsigned i = m_quadtree.nodes[parent].object_begin; i < m_quadtree.nodes[parent].object_end; ++i)
111 if (ContainedInQuadChild(m_objects.bounds[i], type))
113 m_objects.bounds.push_back(TransformToQuadChild(m_objects.bounds[i], type));
114 m_objects.types.push_back(m_objects.types[i]);
115 m_objects.data_indices.push_back(m_objects.data_indices[i]);
119 m_quadtree.nodes[new_index].object_end = m_objects.bounds.size();
123 m_quadtree.nodes[parent].top_left = new_index;
126 m_quadtree.nodes[parent].top_right = new_index;
128 case QTC_BOTTOM_LEFT:
129 m_quadtree.nodes[parent].bottom_left = new_index;
131 case QTC_BOTTOM_RIGHT:
132 m_quadtree.nodes[parent].bottom_right = new_index;
135 Fatal("Tried to add a QuadTree child of invalid type!");
140 // Reparent a quadtree node, making it the "type" child of a new node.
141 QuadTreeIndex Document::GenQuadParent(QuadTreeIndex child, QuadTreeNodeChildren type)
143 QuadTreeIndex new_index = m_quadtree.nodes.size();
144 m_quadtree.nodes.push_back(QuadTreeNode{QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, -1, QTC_UNKNOWN, 0, 0});
146 m_quadtree.nodes[new_index].object_begin = m_objects.bounds.size();
147 for (unsigned i = m_quadtree.nodes[child].object_begin; i < m_quadtree.nodes[child].object_end; ++i)
149 m_objects.bounds.push_back(TransformFromQuadChild(m_objects.bounds[i], type));
150 m_objects.types.push_back(m_objects.types[i]);
151 m_objects.data_indices.push_back(m_objects.data_indices[i]);
154 m_quadtree.nodes[new_index].object_end = m_objects.bounds.size();
158 m_quadtree.nodes[new_index].top_left = child;
161 m_quadtree.nodes[new_index].top_right = child;
163 case QTC_BOTTOM_LEFT:
164 m_quadtree.nodes[new_index].bottom_left = child;
166 case QTC_BOTTOM_RIGHT:
167 m_quadtree.nodes[new_index].bottom_right = child;
170 Fatal("Tried to add a QuadTree child of invalid type!");
177 void Document::Load(const string & filename)
179 m_objects.bounds.clear();
183 Debug("Loaded empty document.");
186 Debug("Loading document from file \"%s\"", filename.c_str());
187 FILE * file = fopen(filename.c_str(), "r");
189 Fatal("Couldn't open file \"%s\"", filename.c_str(), strerror(errno));
193 DocChunkTypes chunk_type;
195 while (ReadChunkHeader(file, chunk_type, chunk_size))
200 read = fread(&m_count, sizeof(m_count), 1, file);
202 Fatal("Failed to read number of objects!");
203 Debug("Number of objects: %u", ObjectCount());
206 Debug("Object types...");
207 LoadStructVector<ObjectType>(file, chunk_size/sizeof(ObjectType), m_objects.types);
210 Debug("Object bounds...");
211 LoadStructVector<Rect>(file, chunk_size/sizeof(Rect), m_objects.bounds);
214 Debug("Object data indices...");
215 LoadStructVector<unsigned>(file, chunk_size/sizeof(unsigned), m_objects.data_indices);
218 Debug("Bezier data...");
219 LoadStructVector<Bezier>(file, chunk_size/sizeof(Bezier), m_objects.beziers);
223 Debug("Successfully loaded %u objects from \"%s\"", ObjectCount(), filename.c_str());
224 #ifndef QUADTREE_DISABLED
225 if (m_quadtree.root_id == QUADTREE_EMPTY)
232 void Document::Add(ObjectType type, const Rect & bounds, unsigned data_index)
234 m_objects.types.push_back(type);
235 m_objects.bounds.push_back(bounds);
236 m_objects.data_indices.push_back(data_index);
237 ++m_count; // Why can't we just use the size of types or something?
240 unsigned Document::AddBezierData(const Bezier & bezier)
242 m_objects.beziers.push_back(bezier);
243 return m_objects.beziers.size()-1;
247 void Document::DebugDumpObjects()
249 Debug("Objects for Document %p are:", this);
250 for (unsigned id = 0; id < ObjectCount(); ++id)
252 Debug("%u. \tType: %u\tBounds: %s", id, m_objects.types[id], m_objects.bounds[id].Str().c_str());
256 bool Document::operator==(const Document & equ) const
258 return (ObjectCount() == equ.ObjectCount()
259 && memcmp(m_objects.bounds.data(), equ.m_objects.bounds.data(), ObjectCount() * sizeof(Rect)) == 0
260 && memcmp(m_objects.data_indices.data(), equ.m_objects.data_indices.data(), ObjectCount() * sizeof(unsigned)) == 0
261 && memcmp(m_objects.beziers.data(), equ.m_objects.beziers.data(), m_objects.beziers.size() * sizeof(Bezier)) == 0);
267 void Document::ParseSVGNode(pugi::xml_node & root, const Rect & bounds, Real & width, Real & height)
269 Debug("Parse node <%s>", root.name());
270 pugi::xml_attribute attrib_w = root.attribute("width");
271 pugi::xml_attribute attrib_h = root.attribute("height");
272 if (!attrib_w.empty())
273 width = attrib_w.as_float() * bounds.w;
274 if (!attrib_h.empty())
275 height = attrib_h.as_float() * bounds.h;
277 for (pugi::xml_node child = root.first_child(); child; child = child.next_sibling())
281 if (strcmp(child.name(), "svg") == 0 || strcmp(child.name(),"g") == 0
282 || strcmp(child.name(), "group") == 0)
284 //TODO: Handle translates etc here
285 ParseSVGNode(child, bounds, width, height);
288 else if (strcmp(child.name(), "path") == 0)
290 string d = child.attribute("d").as_string();
291 Debug("Path data attribute is \"%s\"", d.c_str());
292 ParseSVGPathData(d, Rect(bounds.x,bounds.y,width,height));
294 else if (strcmp(child.name(), "rect") == 0)
297 const char * attrib_names[] = {"x", "y", "width", "height"};
298 for (size_t i = 0; i < 4; ++i)
299 coords[i] = child.attribute(attrib_names[i]).as_float();
301 bool outline = !(child.attribute("fill"));
302 Add(outline?RECT_OUTLINE:RECT_FILLED, Rect(coords[0]/width + bounds.x, coords[1]/height + bounds.y, coords[2]/width, coords[3]/height),0);
304 else if (strcmp(child.name(), "circle") == 0)
306 Real cx = child.attribute("cx").as_float();
307 Real cy = child.attribute("cy").as_float();
308 Real r = child.attribute("r").as_float();
310 Real x = (cx - r)/width + bounds.x;
311 Real y = (cy - r)/height + bounds.y;
312 Real w = Real(2)*r/width;
313 Real h = Real(2)*r/height;
316 Add(CIRCLE_FILLED, rect,0);
317 Debug("Added Circle %s", rect.Str().c_str());
323 * Load an SVG into a rectangle
325 void Document::LoadSVG(const string & filename, const Rect & bounds)
327 using namespace pugi;
329 xml_document doc_xml;
330 ifstream input(filename.c_str(), ios_base::in);
331 xml_parse_result result = doc_xml.load(input);
334 Fatal("Couldn't load \"%s\" - %s", filename.c_str(), result.description());
336 Debug("Loaded XML - %s", result.description());
341 ParseSVGNode(doc_xml, bounds,width,height);
344 // Behold my amazing tokenizing abilities
345 static string & GetToken(const string & d, string & token, unsigned & i)
348 while (i < d.size() && iswspace(d[i]))
355 if (d[i] == ',' || (isalpha(d[i]) && d[i] != 'e') || iswspace(d[i]))
357 if (token.size() == 0 && !iswspace(d[i]))
365 //Debug("Got token \"%s\"", token.c_str());
370 // Fear the wrath of the tokenizing svg data
371 // Seriously this isn't really very DOM-like at all is it?
372 void Document::ParseSVGPathData(const string & d, const Rect & bounds)
374 Real x[4] = {0,0,0,0};
375 Real y[4] = {0,0,0,0};
388 while (i < d.size() && GetToken(d, token, i).size() > 0)
390 if (isalpha(token[0]))
399 bool relative = islower(command[0]);
401 if (command == "m" || command == "M")
403 Debug("Construct moveto command");
404 Real dx = Real(strtod(GetToken(d,token,i).c_str(),NULL)) / bounds.w;
405 assert(GetToken(d,token,i) == ",");
406 Real dy = Real(strtod(GetToken(d,token,i).c_str(),NULL)) / bounds.h;
408 x[0] = (relative) ? x[0] + dx : dx;
409 y[0] = (relative) ? y[0] + dy : dy;
413 Debug("mmoveto %f,%f", Float(x[0]),Float(y[0]));
414 command = (command == "m") ? "l" : "L";
416 else if (command == "c" || command == "C" || command == "q" || command == "Q")
418 Debug("Construct curveto command");
419 Real dx = Real(strtod(GetToken(d,token,i).c_str(),NULL))/bounds.w;
420 assert(GetToken(d,token,i) == ",");
421 Real dy = Real(strtod(GetToken(d,token,i).c_str(),NULL))/bounds.h;
423 x[1] = (relative) ? x[0] + dx : dx;
424 y[1] = (relative) ? y[0] + dy : dy;
426 dx = Real(strtod(GetToken(d,token,i).c_str(),NULL)) / bounds.w;
427 assert(GetToken(d,token,i) == ",");
428 dy = Real(strtod(GetToken(d,token,i).c_str(),NULL)) / bounds.h;
430 x[2] = (relative) ? x[0] + dx : dx;
431 y[2] = (relative) ? y[0] + dy : dy;
433 if (command != "q" && command != "Q")
435 dx = Real(strtod(GetToken(d,token,i).c_str(),NULL)) / bounds.w;
436 assert(GetToken(d,token,i) == ",");
437 dy = Real(strtod(GetToken(d,token,i).c_str(),NULL)) / bounds.h;
438 x[3] = (relative) ? x[0] + dx : dx;
439 y[3] = (relative) ? y[0] + dy : dy;
445 Real old_x1(x[1]), old_y1(y[1]);
446 x[1] = x[0] + Real(2) * (old_x1 - x[0])/ Real(3);
447 y[1] = y[0] + Real(2) * (old_y1 - y[0])/ Real(3);
448 x[2] = x[3] + Real(2) * (old_x1 - x[3])/ Real(3);
449 y[2] = y[3] + Real(2) * (old_y1 - y[3])/ Real(3);
452 unsigned index = AddBezierData(Bezier(x[0],y[0],x[1],y[1],x[2],y[2],x[3],y[3]));
453 Add(BEZIER,Rect(0,0,1,1),index);
456 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]));
463 else if (command == "l" || command == "L")
465 Debug("Construct lineto command");
467 Real dx = Real(strtod(GetToken(d,token,i).c_str(),NULL)) / bounds.w;
468 assert(GetToken(d,token,i) == ",");
469 Real dy = Real(strtod(GetToken(d,token,i).c_str(),NULL)) / bounds.h;
471 x[1] = (relative) ? x[0] + dx : dx;
472 y[1] = (relative) ? y[0] + dy : dy;
480 unsigned index = AddBezierData(Bezier(x[0],y[0],x[1],y[1],x[2],y[2],x[3],y[3]));
481 Add(BEZIER,Rect(0,0,1,1),index);
483 Debug("[%u] lineto %f,%f %f,%f", index, Float(x[0]),Float(y[0]),Float(x[1]),Float(y[1]));
489 else if (command == "z" || command == "Z")
491 Debug("Construct returnto command");
499 unsigned index = AddBezierData(Bezier(x[0],y[0],x[1],y[1],x[2],y[2],x[3],y[3]));
500 Add(BEZIER,Rect(0,0,1,1),index);
502 Debug("[%u] returnto %f,%f %f,%f", index, Float(x[0]),Float(y[0]),Float(x[1]),Float(y[1]));
510 Warn("Unrecognised command \"%s\", set to \"m\"", command.c_str());
524 void Document::AddFontGlyphAtPoint(stbtt_fontinfo *font, int character, Real scale, Real x, Real y)
526 int glyph_index = stbtt_FindGlyphIndex(font, character);
528 // Check if there is actully a glyph to render.
529 if (stbtt_IsGlyphEmpty(font, glyph_index))
534 stbtt_vertex *instructions;
535 int num_instructions = stbtt_GetGlyphShape(font, glyph_index, &instructions);
537 Real current_x(0), current_y(0);
539 for (int i = 0; i < num_instructions; ++i)
541 // TTF uses 16-bit signed ints for coordinates:
542 // with the y-axis inverted compared to us.
543 // Convert and scale any data.
544 Real inst_x = Real(instructions[i].x)*scale;
545 Real inst_y = Real(instructions[i].y)*-scale;
546 Real inst_cx = Real(instructions[i].cx)*scale;
547 Real inst_cy = Real(instructions[i].cy)*-scale;
548 Real old_x(current_x), old_y(current_y);
551 unsigned bezier_index;
552 switch(instructions[i].type)
559 bezier_index = AddBezierData(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));
560 Add(BEZIER,Rect(0,0,1,1),bezier_index);
562 // Quadratic Bezier To:
564 // Quadratic -> Cubic:
565 // - Endpoints are the same.
566 // - cubic1 = quad0+(2/3)*(quad1-quad0)
567 // - cubic2 = quad2+(2/3)*(quad1-quad2)
568 bezier_index = AddBezierData(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,
569 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));
570 Add(BEZIER,Rect(0,0,1,1),bezier_index);
575 stbtt_FreeShape(font, instructions);