src/document.cpp

   1 #include "document.h"
   2 #include "bezier.h"
   3 #include "profiler.h"
   4 #include <cstdio>
   5 #include <fstream>
   6
   7 #include "../contrib/pugixml-1.4/src/pugixml.cpp"
   8 #include "transformationtype.h"
   9
  10 #include "stb_truetype.h"
  11
  12 using namespace IPDF;
  13 using namespace std;
  14
  15 //TODO: Make this work for variable sized Reals
  16
  17 // Loads an std::vector<T> of size num_elements from a file.
  18 template<typename T>
  19 static void LoadStructVector(FILE *src_file, size_t num_elems, std::vector<T>& dest)
  20 {
  21         size_t structsread = 0;
  22         dest.resize(num_elems);
  23         structsread = fread(dest.data(), sizeof(T), num_elems, src_file);
  24         if (structsread != num_elems)
  25                 Fatal("Only read %u structs (expected %u)!", structsread, num_elems);
  26 }
  27
  28 // Saves an std::vector<T> to a file. Size must be saves separately.
  29 template<typename T>
  30 static void SaveStructVector(FILE *dst_file, std::vector<T>& src)
  31 {
  32         size_t written = 0;
  33         written = fwrite(src.data(), sizeof(T), src.size(), dst_file);
  34         if (written != src.size())
  35                 Fatal("Only wrote %u structs (expected %u)!", written, src.size());
  36 }
  37
  38 static void WriteChunkHeader(FILE *dst_file, DocChunkTypes type, uint32_t size)
  39 {
  40         size_t written = 0;
  41         written = fwrite(&type, sizeof(type), 1, dst_file);
  42         if (written != 1)
  43                 Fatal("Could not write Chunk header! (ID)");
  44         written = fwrite(&size, sizeof(size), 1, dst_file);
  45         if (written != 1)
  46                 Fatal("Could not write Chunk header (size)!");
  47 }
  48
  49 static bool ReadChunkHeader(FILE *src_file, DocChunkTypes& type, uint32_t& size)
  50 {
  51         if (fread(&type, sizeof(DocChunkTypes), 1, src_file) != 1)
  52                 return false;
  53         if (fread(&size, sizeof(uint32_t), 1, src_file) != 1)
  54                 return false;
  55         return true;
  56 }
  57
  58 void Document::Save(const string & filename)
  59 {
  60         Debug("Saving document to file \"%s\"...", filename.c_str());
  61         FILE * file = fopen(filename.c_str(), "w");
  62         if (file == NULL)
  63                 Fatal("Couldn't open file \"%s\" - %s", filename.c_str(), strerror(errno));
  64
  65         size_t written;
  66         Debug("Number of objects (%u)...", ObjectCount());
  67         WriteChunkHeader(file, CT_NUMOBJS, sizeof(m_count));
  68         written = fwrite(&m_count, sizeof(m_count), 1, file);
  69         if (written != 1)
  70                 Fatal("Failed to write number of objects!");
  71
  72         Debug("Object types...");
  73         WriteChunkHeader(file, CT_OBJTYPES, m_objects.types.size() * sizeof(ObjectType));
  74         SaveStructVector<ObjectType>(file, m_objects.types);
  75
  76         Debug("Object bounds...");
  77         WriteChunkHeader(file, CT_OBJBOUNDS, m_objects.bounds.size() * sizeof(Rect));
  78         SaveStructVector<Rect>(file, m_objects.bounds);
  79
  80         Debug("Object data indices...");
  81         WriteChunkHeader(file, CT_OBJINDICES, m_objects.data_indices.size() * sizeof(unsigned));
  82         SaveStructVector<unsigned>(file, m_objects.data_indices);
  83
  84         Debug("Bezier data...");
  85         WriteChunkHeader(file, CT_OBJBEZIERS, m_objects.beziers.size() * sizeof(uint8_t));
  86         SaveStructVector<Bezier>(file, m_objects.beziers);
  87
  88         int err = fclose(file);
  89         if (err != 0)
  90                 Fatal("Failed to close file \"%s\" - %s", filename.c_str(), strerror(err));
  91
  92         Debug("Successfully saved %u objects to \"%s\"", ObjectCount(), filename.c_str());
  93 }
  94
  95 #ifndef QUADTREE_DISABLED
  96
  97 void Document::GenBaseQuadtree()
  98 {
  99         m_quadtree.nodes.push_back(QuadTreeNode{QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, QTC_UNKNOWN, 0, ObjectCount(), -1});
 100         m_quadtree.root_id = 0;
 101 }
 102
 103 int Document::ClipObjectToQuadChild(int object_id, QuadTreeNodeChildren type)
 104 {
 105         PROFILE_SCOPE("Document::ClipObjectToQuadChild");
 106         switch (m_objects.types[object_id])
 107         {
 108         case RECT_FILLED:
 109         case RECT_OUTLINE:
 110         case PATH:
 111                 {
 112                 Rect obj_bounds = TransformToQuadChild(m_objects.bounds[object_id], type);
 113                 if (obj_bounds.x < 0)
 114                 {
 115                         obj_bounds.w += obj_bounds.x;
 116                         obj_bounds.x = 0;
 117                 }
 118                 if (obj_bounds.y < 0)
 119                 {
 120                         obj_bounds.h += obj_bounds.y;
 121                         obj_bounds.y = 0;
 122                 }
 123                 if (obj_bounds.x + obj_bounds.w > 1)
 124                 {
 125                         obj_bounds.w += (1 - (obj_bounds.x + obj_bounds.w));
 126                 }
 127                 if (obj_bounds.y + obj_bounds.h > 1)
 128                 {
 129                         obj_bounds.h += (1 - (obj_bounds.y + obj_bounds.h));
 130                 }
 131                 m_objects.bounds.push_back(obj_bounds);
 132                 m_objects.types.push_back(m_objects.types[object_id]);
 133                 m_objects.data_indices.push_back(m_objects.data_indices[object_id]);
 134                 return 1;
 135                 }
 136         case BEZIER:
 137                 {
 138                 // If we're entirely within the quadtree node, no clipping need occur.
 139                 if (ContainedInQuadChild(m_objects.bounds[object_id], type))
 140                 {
 141                         m_objects.bounds.push_back(TransformToQuadChild(m_objects.bounds[object_id], type));
 142                         m_objects.types.push_back(m_objects.types[object_id]);
 143                         m_objects.data_indices.push_back(m_objects.data_indices[object_id]);
 144                         return 1;
 145                 }
 146                 Rect clip_bezier_bounds = TransformRectCoordinates(m_objects.bounds[object_id], TransformFromQuadChild(Rect{0,0,1,1}, type));
 147                 std::vector<Bezier> new_curves = m_objects.beziers[m_objects.data_indices[object_id]].ClipToRectangle(clip_bezier_bounds);
 148                 for (size_t i = 0; i < new_curves.size(); ++i)
 149                 {
 150                         Rect new_bounds = TransformToQuadChild(m_objects.bounds[object_id], type);
 151                         Bezier new_curve_data = new_curves[i].ToAbsolute(TransformToQuadChild(m_objects.bounds[object_id],type));
 152                         new_bounds = new_curve_data.SolveBounds();
 153                         Debug("New bounds: %s", new_bounds.Str().c_str());
 154                         new_curve_data = new_curve_data.ToRelative(new_bounds);
 155                         unsigned index = AddBezierData(new_curve_data);
 156                         m_objects.bounds.push_back(new_bounds);
 157                         m_objects.types.push_back(BEZIER);
 158                         m_objects.data_indices.push_back(index);
 159                 }
 160                 return new_curves.size();
 161                 }
 162         default:
 163                 Debug("Adding %s -> %s", m_objects.bounds[object_id].Str().c_str(), TransformToQuadChild(m_objects.bounds[object_id], type).Str().c_str());
 164                 m_objects.bounds.push_back(TransformToQuadChild(m_objects.bounds[object_id], type));
 165                 m_objects.types.push_back(m_objects.types[object_id]);
 166                 m_objects.data_indices.push_back(m_objects.data_indices[object_id]);
 167                 return 1;
 168         }
 169         return 0;
 170 }
 171 QuadTreeIndex Document::GenQuadChild(QuadTreeIndex parent, QuadTreeNodeChildren type)
 172 {
 173         PROFILE_SCOPE("Document::GenQuadChild()");
 174         QuadTreeIndex new_index = m_quadtree.nodes.size();
 175         Debug("-------------- Generating Quadtree Node %d (parent %d, type %d) ----------------------", new_index, parent, type);
 176         m_quadtree.nodes.push_back(QuadTreeNode{QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, parent, type, 0, 0, -1});
 177
 178         m_quadtree.nodes[new_index].object_begin = m_objects.bounds.size();
 179         for (QuadTreeIndex overlay = parent; overlay != -1; overlay = m_quadtree.nodes[overlay].next_overlay)
 180         {
 181                 for (unsigned i = m_quadtree.nodes[overlay].object_begin; i < m_quadtree.nodes[overlay].object_end; ++i)
 182                 {
 183                         if (IntersectsQuadChild(m_objects.bounds[i], type))
 184                         {
 185                                 m_count += ClipObjectToQuadChild(i, type);
 186                         }
 187                 }
 188         }
 189         m_quadtree.nodes[new_index].object_end = m_objects.bounds.size();
 190         // No objects are dirty.
 191         m_quadtree.nodes[new_index].object_dirty = m_objects.bounds.size();
 192         switch (type)
 193         {
 194                 case QTC_TOP_LEFT:
 195                         m_quadtree.nodes[parent].top_left = new_index;
 196                         break;
 197                 case QTC_TOP_RIGHT:
 198                         m_quadtree.nodes[parent].top_right = new_index;
 199                         break;
 200                 case QTC_BOTTOM_LEFT:
 201                         m_quadtree.nodes[parent].bottom_left = new_index;
 202                         break;
 203                 case QTC_BOTTOM_RIGHT:
 204                         m_quadtree.nodes[parent].bottom_right = new_index;
 205                         break;
 206                 default:
 207                         Fatal("Tried to add a QuadTree child of invalid type!");
 208         }
 209         m_document_dirty = true;
 210         return new_index;
 211 }
 212
 213 void Document::OverlayQuadChildren(QuadTreeIndex orig_parent, QuadTreeIndex parent, QuadTreeNodeChildren type)
 214 {
 215         PROFILE_SCOPE("Document::OverlayQuadChildren()");
 216         QuadTreeIndex new_index = m_quadtree.nodes.size();
 217         Debug("-------------- Generating Quadtree Node %d (orig %d parent %d, type %d) ----------------------", new_index, orig_parent, parent, type);
 218         m_quadtree.nodes.push_back(QuadTreeNode{QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, orig_parent, type, 0, 0, -1});
 219
 220         m_quadtree.nodes[new_index].object_begin = m_objects.bounds.size();
 221         for (unsigned i = m_quadtree.nodes[parent].object_dirty; i < m_quadtree.nodes[parent].object_end; ++i)
 222         {
 223                 if (IntersectsQuadChild(m_objects.bounds[i], type))
 224                 {
 225                         m_count += ClipObjectToQuadChild(i, type);
 226                 }
 227         }
 228         m_quadtree.nodes[new_index].object_end = m_objects.bounds.size();
 229         QuadTreeIndex orig_node = -1;
 230         switch (type)
 231         {
 232                 case QTC_TOP_LEFT:
 233                         orig_node = m_quadtree.nodes[orig_parent].top_left;
 234                         break;
 235                 case QTC_TOP_RIGHT:
 236                         orig_node = m_quadtree.nodes[orig_parent].top_right;
 237                         break;
 238                 case QTC_BOTTOM_LEFT:
 239                         orig_node = m_quadtree.nodes[orig_parent].bottom_left;
 240                         break;
 241                 case QTC_BOTTOM_RIGHT:
 242                         orig_node = m_quadtree.nodes[orig_parent].bottom_right;
 243                         break;
 244                 default:
 245                         Fatal("Tried to overlay a QuadTree child of invalid type!");
 246         }
 247         if (orig_node == -1)
 248                 Fatal("Tried to overlay a QuadTree child that didn't exist!");
 249
 250         // Add us to the node's overlay linked list.
 251         QuadTreeIndex prev_overlay = orig_node;
 252         while (m_quadtree.nodes[prev_overlay].next_overlay != -1) prev_overlay = m_quadtree.nodes[prev_overlay].next_overlay;
 253         Debug("- Original node %d, Previous overlay %d, new overlay %d", orig_node, prev_overlay, new_index);
 254         m_quadtree.nodes[prev_overlay].next_overlay = new_index;
 255
 256         // Recurse into any extant children.
 257         if (m_quadtree.nodes[orig_node].top_left != -1)
 258                 OverlayQuadChildren(orig_node, new_index, QTC_TOP_LEFT);
 259         if (m_quadtree.nodes[orig_node].top_right != -1)
 260                 OverlayQuadChildren(orig_node, new_index, QTC_TOP_RIGHT);
 261         if (m_quadtree.nodes[orig_node].bottom_left != -1)
 262                 OverlayQuadChildren(orig_node, new_index, QTC_BOTTOM_LEFT);
 263         if (m_quadtree.nodes[orig_node].bottom_right != -1)
 264                 OverlayQuadChildren(orig_node, new_index, QTC_BOTTOM_RIGHT);
 265
 266         m_quadtree.nodes[new_index].object_dirty = m_quadtree.nodes[new_index].object_end;
 267         m_quadtree.nodes[new_index].next_overlay = -1;
 268         m_document_dirty = true;
 269 }
 270
 271 void Document::OverlayQuadParent(QuadTreeIndex orig_child, QuadTreeIndex child, QuadTreeNodeChildren type)
 272 {
 273         PROFILE_SCOPE("Document::OverlayQuadParent()");
 274         QuadTreeIndex new_index = m_quadtree.nodes.size();
 275         m_quadtree.nodes.push_back(QuadTreeNode{QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, -1, QTC_UNKNOWN, 0, 0, -1});
 276
 277         m_quadtree.nodes[new_index].object_begin = m_objects.bounds.size();
 278         m_quadtree.nodes[new_index].object_dirty = m_objects.bounds.size();
 279         for (QuadTreeIndex overlay = child; overlay != -1; overlay = m_quadtree.nodes[overlay].next_overlay)
 280         {
 281                 for (unsigned i = m_quadtree.nodes[overlay].object_begin; i < m_quadtree.nodes[overlay].object_end; ++i)
 282                 {
 283                         m_objects.bounds.push_back(TransformFromQuadChild(m_objects.bounds[i], type));
 284                         m_objects.types.push_back(m_objects.types[i]);
 285                         m_objects.data_indices.push_back(m_objects.data_indices[i]);
 286                         m_count++;
 287                 }
 288         }
 289         m_quadtree.nodes[new_index].object_end = m_objects.bounds.size();
 290         QuadTreeIndex orig_node = m_quadtree.nodes[orig_child].parent;
 291         if (orig_node == -1)
 292                 Fatal("Tried to overlay a QuadTree child that didn't exist!");
 293
 294         // Add us to the node's overlay linked list.
 295         QuadTreeIndex prev_overlay = orig_node;
 296         while (m_quadtree.nodes[prev_overlay].next_overlay != -1) prev_overlay = m_quadtree.nodes[prev_overlay].next_overlay;
 297         m_quadtree.nodes[prev_overlay].next_overlay = new_index;
 298
 299         // Recurse into any extant parent.
 300         if (m_quadtree.nodes[orig_node].parent != -1)
 301                 OverlayQuadParent(orig_node, new_index, m_quadtree.nodes[orig_node].child_type);
 302
 303         m_quadtree.nodes[new_index].object_dirty = m_quadtree.nodes[new_index].object_end;
 304         m_quadtree.nodes[new_index].next_overlay = -1;
 305         m_document_dirty = true;
 306 }
 307
 308 void Document::PropagateQuadChanges(QuadTreeIndex node)
 309 {
 310         for(QuadTreeIndex overlay = node; overlay != -1; overlay = m_quadtree.nodes[overlay].next_overlay)
 311         {
 312                 // We don't care about clean overlays.
 313                 if (m_quadtree.nodes[overlay].object_dirty == m_quadtree.nodes[overlay].object_end) continue;
 314                 // Recurse into our parent, should we have any.
 315                 if (m_quadtree.nodes[node].parent != -1)
 316                         OverlayQuadParent(node, overlay, m_quadtree.nodes[overlay].child_type);
 317                 // Recurse into any extant children.
 318                 if (m_quadtree.nodes[node].top_left != -1)
 319                         OverlayQuadChildren(node, overlay, QTC_TOP_LEFT);
 320                 if (m_quadtree.nodes[node].top_right != -1)
 321                         OverlayQuadChildren(node, overlay, QTC_TOP_RIGHT);
 322                 if (m_quadtree.nodes[node].bottom_left != -1)
 323                         OverlayQuadChildren(node, overlay, QTC_BOTTOM_LEFT);
 324                 if (m_quadtree.nodes[node].bottom_right != -1)
 325                         OverlayQuadChildren(node, overlay, QTC_BOTTOM_RIGHT);
 326
 327                 m_quadtree.nodes[overlay].object_dirty = m_quadtree.nodes[overlay].object_end;
 328         }
 329 }
 330
 331 // Reparent a quadtree node, making it the "type" child of a new node.
 332 QuadTreeIndex Document::GenQuadParent(QuadTreeIndex child, QuadTreeNodeChildren type)
 333 {
 334         QuadTreeIndex new_index = m_quadtree.nodes.size();
 335         m_quadtree.nodes.push_back(QuadTreeNode{QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, -1, QTC_UNKNOWN, 0, 0, -1});
 336
 337         m_quadtree.nodes[new_index].object_begin = m_objects.bounds.size();
 338         for (QuadTreeIndex overlay = child; overlay != -1; overlay = m_quadtree.nodes[overlay].next_overlay)
 339         {
 340                 for (unsigned i = m_quadtree.nodes[overlay].object_begin; i < m_quadtree.nodes[overlay].object_end; ++i)
 341                 {
 342                         m_objects.bounds.push_back(TransformFromQuadChild(m_objects.bounds[i], type));
 343                         m_objects.types.push_back(m_objects.types[i]);
 344                         m_objects.data_indices.push_back(m_objects.data_indices[i]);
 345                         m_count++;
 346                 }
 347         }
 348         m_quadtree.nodes[new_index].object_end = m_objects.bounds.size();
 349         m_quadtree.nodes[new_index].object_dirty = m_objects.bounds.size();
 350         switch (type)
 351         {
 352                 case QTC_TOP_LEFT:
 353                         m_quadtree.nodes[new_index].top_left = child;
 354                         break;
 355                 case QTC_TOP_RIGHT:
 356                         m_quadtree.nodes[new_index].top_right = child;
 357                         break;
 358                 case QTC_BOTTOM_LEFT:
 359                         m_quadtree.nodes[new_index].bottom_left = child;
 360                         break;
 361                 case QTC_BOTTOM_RIGHT:
 362                         m_quadtree.nodes[new_index].bottom_right = child;
 363                         break;
 364                 default:
 365                         Fatal("Tried to add a QuadTree child of invalid type!");
 366         }
 367         return new_index;
 368         m_document_dirty = true;
 369 }
 370
 371 #endif
 372
 373 void Document::Load(const string & filename)
 374 {
 375         m_objects.bounds.clear();
 376         m_count = 0;
 377         if (filename == "")
 378         {
 379                 Debug("Loaded empty document.");
 380                 return;
 381         }
 382         Debug("Loading document from file \"%s\"", filename.c_str());
 383         FILE * file = fopen(filename.c_str(), "r");
 384         if (file == NULL)
 385                 Fatal("Couldn't open file \"%s\"", filename.c_str(), strerror(errno));
 386
 387         size_t read;
 388
 389         DocChunkTypes chunk_type;
 390         uint32_t chunk_size;
 391         while (ReadChunkHeader(file, chunk_type, chunk_size))
 392         {
 393                 switch(chunk_type)
 394                 {
 395                 case CT_NUMOBJS:
 396                         read = fread(&m_count, sizeof(m_count), 1, file);
 397                         if (read != 1)
 398                                 Fatal("Failed to read number of objects!");
 399                         Debug("Number of objects: %u", ObjectCount());
 400                         break;
 401                 case CT_OBJTYPES:
 402                         Debug("Object types...");
 403                         LoadStructVector<ObjectType>(file, chunk_size/sizeof(ObjectType), m_objects.types);
 404                         break;
 405                 case CT_OBJBOUNDS:
 406                         Debug("Object bounds...");
 407                         LoadStructVector<Rect>(file, chunk_size/sizeof(Rect), m_objects.bounds);
 408                         break;
 409                 case CT_OBJINDICES:
 410                         Debug("Object data indices...");
 411                         LoadStructVector<unsigned>(file, chunk_size/sizeof(unsigned), m_objects.data_indices);
 412                         break;
 413                 case CT_OBJBEZIERS:
 414                         Debug("Bezier data...");
 415                         LoadStructVector<Bezier>(file, chunk_size/sizeof(Bezier), m_objects.beziers);
 416                         break;
 417
 418                 case CT_OBJPATHS:
 419                         Debug("Path data...");
 420                         Warn("Not handled because lazy");
 421                         break;
 422                 }
 423         }
 424         Debug("Successfully loaded %u objects from \"%s\"", ObjectCount(), filename.c_str());
 425 #ifndef QUADTREE_DISABLED
 426         if (m_quadtree.root_id == QUADTREE_EMPTY)
 427         {
 428                 GenBaseQuadtree();
 429         }
 430 #endif
 431 }
 432
 433 unsigned Document::AddPath(unsigned start_index, unsigned end_index, const Colour & fill, const Colour & stroke)
 434 {
 435         Path path(m_objects, start_index, end_index, fill, stroke);
 436         unsigned data_index = AddPathData(path);
 437         Rect bounds = path.SolveBounds(m_objects);
 438         unsigned result = Add(PATH, bounds,data_index);
 439         m_objects.paths[data_index].m_index = result;
 440         //Debug("Added path %u -> %u (%u objects) colour {%u,%u,%u,%u}, stroke {%u,%u,%u,%u}", start_index, end_index, (end_index - start_index), fill.r, fill.g, fill.b, fill.a, stroke.r, stroke.g, stroke.b, stroke.a);
 441         return result;
 442 }
 443
 444 /**
 445  * Add a Bezier using Absolute coords
 446  */
 447 unsigned Document::AddBezier(const Bezier & bezier)
 448 {
 449         Rect bounds = bezier.SolveBounds();
 450         Bezier data = bezier.ToRelative(bounds); // Relative
 451         if (data.ToAbsolute(bounds) != bezier)
 452         {
 453                 Warn("%s != %s", data.ToAbsolute(bounds).Str().c_str(),
 454                         bezier.Str().c_str());
 455                 Warn("ToAbsolute on ToRelative does not give original Bezier");
 456         }
 457         unsigned index = AddBezierData(data);
 458         return Add(BEZIER, bounds, index);
 459 }
 460
 461 unsigned Document::Add(ObjectType type, const Rect & bounds, unsigned data_index, QuadTreeIndex qti)
 462 {
 463         PROFILE_SCOPE("Document::Add");
 464         Rect new_bounds = bounds;
 465 #ifndef QUADTREE_DISABLED
 466         if (qti == -1) qti = m_current_insert_node;
 467         if (qti != -1)
 468         {
 469                 // I am ashamed, yes.
 470                 m_quadtree.GetCanonicalCoords(qti, new_bounds.x, new_bounds.y, this);
 471         }
 472 #endif
 473         m_objects.types.push_back(type);
 474         m_objects.bounds.push_back(new_bounds);
 475         m_objects.data_indices.push_back(data_index);
 476 #ifndef QUADTREE_DISABLED
 477         if (qti != -1)
 478         {
 479                 QuadTreeIndex new_qti = qti;
 480                 while (m_quadtree.nodes[new_qti].next_overlay != -1)
 481                 {
 482                         if (m_count == m_quadtree.nodes[new_qti].object_end+1)
 483                         {
 484                                 m_quadtree.nodes[new_qti].object_end++;
 485                                 goto done;
 486                         }
 487                         new_qti = m_quadtree.nodes[new_qti].next_overlay;
 488                 }
 489                 {
 490                         QuadTreeIndex overlay = m_quadtree.nodes.size();
 491                         Debug("Adding new overlay, nqti = %d, overlay = %d", new_qti, overlay);
 492                         m_quadtree.nodes.push_back(m_quadtree.nodes[qti]);
 493                         m_quadtree.nodes[overlay].object_begin = m_count;
 494                         // All objects are dirty.
 495                         m_quadtree.nodes[overlay].object_dirty = m_count;
 496                         m_quadtree.nodes[overlay].object_end = m_count+1;
 497                         m_quadtree.nodes[overlay].next_overlay = -1;
 498                         m_quadtree.nodes[new_qti].next_overlay = overlay;
 499                         new_qti = overlay;
 500                 }
 501 done: // matches is not amused, but sulix is nice and moved it inside the #ifdef for him.
 502                 m_count++;
 503         }
 504         return m_count-1;
 505 #else // words fail me (still not amused)
 506         return (m_count++);
 507 #endif
 508
 509 }
 510
 511 unsigned Document::AddBezierData(const Bezier & bezier)
 512 {
 513         m_objects.beziers.push_back(bezier);
 514         return m_objects.beziers.size()-1;
 515 }
 516
 517 unsigned Document::AddPathData(const Path & path)
 518 {
 519         m_objects.paths.push_back(path);
 520         return m_objects.paths.size()-1;
 521 }
 522
 523 void Document::DebugDumpObjects()
 524 {
 525         Debug("Objects for Document %p are:", this);
 526         for (unsigned id = 0; id < ObjectCount(); ++id)
 527         {
 528                 Debug("%u. \tType: %u\tBounds: %s", id, m_objects.types[id], m_objects.bounds[id].Str().c_str());
 529         }
 530 }
 531
 532 bool Document::operator==(const Document & equ) const
 533 {
 534         return (ObjectCount() == equ.ObjectCount()
 535                 && memcmp(m_objects.bounds.data(), equ.m_objects.bounds.data(), ObjectCount() * sizeof(Rect)) == 0
 536                 && memcmp(m_objects.data_indices.data(), equ.m_objects.data_indices.data(), ObjectCount() * sizeof(unsigned)) == 0
 537                 && memcmp(m_objects.beziers.data(), equ.m_objects.beziers.data(), m_objects.beziers.size() * sizeof(Bezier)) == 0);
 538 }
 539
 540
 541
 542 // Behold my amazing tokenizing abilities
 543 static string & GetToken(const string & d, string & token, unsigned & i, const string & delims = "()[],{}<>;:=")
 544 {
 545         token.clear();
 546         while (i < d.size() && iswspace(d[i]))
 547         {
 548                 ++i;
 549         }
 550
 551         while (i < d.size())
 552         {
 553                 if (iswspace(d[i]) || strchr(delims.c_str(),d[i]) != NULL)
 554                 {
 555                         if (token.size() == 0 && !iswspace(d[i]))
 556                         {
 557                                 token += d[i++];
 558                         }
 559                         break;
 560                 }
 561                 token += d[i++];
 562         }
 563         //Debug("Got token \"%s\"", token.c_str());
 564         return token;
 565 }
 566
 567 static void GetXYPair(const string & d, Real & x, Real & y, unsigned & i,const string & delims = "()[],{}<>;:=")
 568 {
 569         string token("");
 570         while (GetToken(d, token, i, delims) == ",");
 571         x = RealFromStr(token);
 572         if (GetToken(d, token, i, delims) != ",")
 573         {
 574                 Fatal("Expected \",\" seperating x,y pair");
 575         }
 576         y = RealFromStr(GetToken(d,token,i,delims));
 577 }
 578
 579 static bool GetKeyValuePair(const string & d, string & key, string & value, unsigned & i, const string & delims = "()[],{}<>;:=")
 580 {
 581         key = "";
 582         string token;
 583         while (GetToken(d, token, i, delims) == ":" || token == ";");
 584         key = token;
 585         if (GetToken(d, token, i, delims) != ":")
 586         {
 587                 Error("Expected \":\" seperating key:value pair");
 588                 return false;
 589         }
 590         value = "";
 591         GetToken(d, value, i, delims);
 592         return true;
 593 }
 594
 595 static void TransformXYPair(Real & x, Real & y, const SVGMatrix & transform)
 596 {
 597         Real x0(x);
 598         x = transform.a * x + transform.c * y + transform.e;
 599         y = transform.b * x0 + transform.d * y + transform.f;
 600 }
 601
 602 void Document::ParseSVGTransform(const string & s, SVGMatrix & transform)
 603 {
 604         //Debug("Parsing transform %s", s.c_str());
 605         string token;
 606         string command;
 607         unsigned i = 0;
 608
 609         while (i < s.size())
 610         {
 611                 GetToken(s, command, i);
 612                 if (command == "," || command == "" || command == ":")
 613                 {
 614                         if (i < s.size())
 615                                 GetToken(s, command, i);
 616                         else
 617                                 return;
 618                 }
 619                 //Debug("Token is \"%s\"", command.c_str());
 620
 621                 SVGMatrix delta = {1,0,0,0,1,0};
 622
 623
 624                 assert(GetToken(s,token, i) == "(");
 625                 if (command == "translate")
 626                 {
 627                         GetXYPair(s, delta.e, delta.f, i);
 628                         assert(GetToken(s,token, i) == ")");
 629                 }
 630                 else if (command == "matrix")
 631                 {
 632                         GetXYPair(s, delta.a, delta.b,i);
 633                         GetXYPair(s, delta.c, delta.d,i);
 634                         GetXYPair(s, delta.e, delta.f,i);
 635                         assert(GetToken(s,token, i) == ")");
 636                 }
 637                 else if (command == "scale")
 638                 {
 639                         delta.a = RealFromStr(GetToken(s,token,i));
 640                         GetToken(s, token, i);
 641                         if (token == ",")
 642                         {
 643                                 delta.d = RealFromStr(GetToken(s,token,i));
 644                                 assert(GetToken(s, token, i) == ")");
 645                         }
 646                         else
 647                         {
 648                                 delta.d = delta.a;
 649                                 assert(token == ")");
 650                         }
 651
 652                 }
 653                 else
 654                 {
 655                         Warn("Unrecognised transform \"%s\", using identity", command.c_str());
 656                 }
 657
 658                 //Debug("Old transform is {%f,%f,%f,%f,%f,%f}", transform.a, transform.b, transform.c, transform.d,transform.e,transform.f);
 659                 //Debug("Delta transform is {%f,%f,%f,%f,%f,%f}", delta.a, delta.b, delta.c, delta.d,delta.e,delta.f);
 660
 661                 SVGMatrix old(transform);
 662                 transform.a = old.a * delta.a + old.c * delta.b;
 663                 transform.c = old.a * delta.c + old.c * delta.d;
 664                 transform.e = old.a * delta.e + old.c * delta.f + old.e;
 665
 666                 transform.b = old.b * delta.a + old.d * delta.b;
 667                 transform.d = old.b * delta.c + old.d * delta.d;
 668                 transform.f = old.b * delta.e + old.d * delta.f + old.f;
 669
 670                 //Debug("New transform is {%f,%f,%f,%f,%f,%f}", transform.a, transform.b, transform.c, transform.d,transform.e,transform.f);
 671         }
 672 }
 673
 674 inline Colour ParseColourString(const string & colour_str)
 675 {
 676         Colour c(0,0,0,0);
 677         if (colour_str == "red")
 678                 c = {255,0,0,255};
 679         else if (colour_str == "blue")
 680                 c = {0,0,255,255};
 681         else if (colour_str == "green")
 682                 c = {0,255,0,255};
 683         else if (colour_str == "black")
 684                 c = {0,0,0,255};
 685         else if (colour_str == "white")
 686                 c = {255,255,255,255};
 687         else if (colour_str.size() == 7 && colour_str[0] == '#')
 688         {
 689                 //Debug("Parse colour string: \"%s\"", colour_str.c_str());
 690                 char comp[3] = {colour_str[1], colour_str[2], '\0'};
 691                 c.r = strtoul(comp, NULL, 16);
 692                 comp[0] = colour_str[3]; comp[1] = colour_str[4];
 693                 c.g = strtoul(comp, NULL, 16);
 694                 comp[0] = colour_str[5]; comp[1] = colour_str[6];
 695                 c.b = strtoul(comp, NULL, 16);
 696                 c.a = 255;
 697                 //Debug("Colour is: %u, %u, %u, %u", c.r, c.g, c.b, c.a);
 698         }
 699         return c;
 700 }
 701
 702 void Document::ParseSVGNode(pugi::xml_node & root, SVGMatrix & parent_transform)
 703 {
 704         //Debug("Parse node <%s>", root.name());
 705
 706
 707         // Centre the SVGs
 708         if (strcmp(root.name(),"svg") == 0)
 709         {
 710                 Real ww = RealFromStr(root.attribute("width").as_string());
 711                 Real hh = RealFromStr(root.attribute("height").as_string());
 712                 parent_transform.e -= parent_transform.a * ww/Real(2);
 713                 parent_transform.f -= parent_transform.d * hh/Real(2);
 714         }
 715
 716         for (pugi::xml_node child = root.first_child(); child; child = child.next_sibling())
 717         {
 718                 SVGMatrix transform(parent_transform);
 719                 pugi::xml_attribute attrib_trans = child.attribute("transform");
 720                 if (!attrib_trans.empty())
 721                 {
 722                         ParseSVGTransform(attrib_trans.as_string(), transform);
 723                 }
 724
 725
 726
 727                 if (strcmp(child.name(), "svg") == 0 || strcmp(child.name(),"g") == 0
 728                         || strcmp(child.name(), "group") == 0)
 729                 {
 730
 731                         ParseSVGNode(child, transform);
 732                         continue;
 733                 }
 734                 else if (strcmp(child.name(), "path") == 0)
 735                 {
 736                         string d = child.attribute("d").as_string();
 737                         //Debug("Path data attribute is \"%s\"", d.c_str());
 738                         bool closed = false;
 739                         pair<unsigned, unsigned> range = ParseSVGPathData(d, transform, closed);
 740                         if (true && range.first < m_count && range.second < m_count)//(closed)
 741                         {
 742
 743                                 string colour_str("");
 744                                 map<string, string> style;
 745                                 if (child.attribute("style"))
 746                                 {
 747                                         ParseSVGStyleData(child.attribute("style").as_string(), style);
 748                                 }
 749
 750                                 // Determine shading colour
 751                                 if (child.attribute("fill"))
 752                                 {
 753                                         colour_str = child.attribute("fill").as_string();
 754                                 }
 755                                 else if (style.find("fill") != style.end())
 756                                 {
 757                                         colour_str = style["fill"];
 758                                 }
 759                                 Colour fill = ParseColourString(colour_str);
 760                                 Colour stroke = fill;
 761
 762                                 if (child.attribute("stroke"))
 763                                 {
 764                                         colour_str = child.attribute("stroke").as_string();
 765                                         stroke = ParseColourString(colour_str);
 766                                 }
 767                                 else if (style.find("stroke") != style.end())
 768                                 {
 769                                         colour_str = style["stroke"];
 770                                         stroke = ParseColourString(colour_str);
 771                                 }
 772
 773
 774                                 // Determin shading alpha
 775                                 if (child.attribute("fill-opacity"))
 776                                 {
 777                                         fill.a = 255*child.attribute("fill-opacity").as_float();
 778                                 }
 779                                 else if (style.find("fill-opacity") != style.end())
 780                                 {
 781                                         fill.a = 255*strtod(style["fill-opacity"].c_str(), NULL);
 782                                 }
 783                                 if (child.attribute("stroke-opacity"))
 784                                 {
 785                                         stroke.a = 255*child.attribute("stroke-opacity").as_float();
 786                                 }
 787                                 else if (style.find("stroke-opacity") != style.end())
 788                                 {
 789                                         stroke.a = 255*strtod(style["stroke-opacity"].c_str(), NULL);
 790                                 }
 791                                 AddPath(range.first, range.second, fill, stroke);
 792                         }
 793
 794                 }
 795                 else if (strcmp(child.name(), "line") == 0)
 796                 {
 797                         Real x0(child.attribute("x1").as_float());
 798                         Real y0(child.attribute("y1").as_float());
 799                         Real x1(child.attribute("x2").as_float());
 800                         Real y1(child.attribute("y2").as_float());
 801                         TransformXYPair(x0,y0,transform);
 802                         TransformXYPair(x1,y1,transform);
 803                         AddBezier(Bezier(x0,y0,x1,y1,x1,y1,x1,y1));
 804                 }
 805                 else if (strcmp(child.name(), "rect") == 0)
 806                 {
 807                         Real coords[4];
 808                         const char * attrib_names[] = {"x", "y", "width", "height"};
 809                         for (size_t i = 0; i < 4; ++i)
 810                                 coords[i] = child.attribute(attrib_names[i]).as_float();
 811
 812                         Real x2(coords[0]+coords[2]);
 813                         Real y2(coords[1]+coords[3]);
 814                         TransformXYPair(coords[0],coords[1],transform); // x, y, transform
 815                         TransformXYPair(x2,y2,transform);
 816                         coords[2] = x2 - coords[0];
 817                         coords[3] = y2 - coords[1];
 818
 819                         bool outline = !(child.attribute("fill") && strcmp(child.attribute("fill").as_string(),"none") != 0);
 820                         Add(outline?RECT_OUTLINE:RECT_FILLED, Rect(coords[0], coords[1], coords[2], coords[3]),0);
 821                 }
 822                 else if (strcmp(child.name(), "circle") == 0)
 823                 {
 824                         Real cx = child.attribute("cx").as_float();
 825                         Real cy = child.attribute("cy").as_float();
 826                         Real r = child.attribute("r").as_float();
 827
 828                         Real x = (cx - r);
 829                         Real y = (cy - r);
 830                         TransformXYPair(x,y,transform);
 831                         Real w = Real(2)*r*transform.a; // width scales
 832                         Real h = Real(2)*r*transform.d; // height scales
 833
 834
 835                         Rect rect(x,y,w,h);
 836                         Add(CIRCLE_FILLED, rect,0);
 837                         Debug("Added Circle %s", rect.Str().c_str());
 838                 }
 839                 else if (strcmp(child.name(), "text") == 0)
 840                 {
 841                         Real x = child.attribute("x").as_float();
 842                         Real y = child.attribute("y").as_float();
 843                         TransformXYPair(x,y,transform);
 844                         Debug("Add text \"%s\"", child.child_value());
 845                         AddText(child.child_value(), 0.05, x, y);
 846                 }
 847         }
 848 }
 849
 850 void Document::ParseSVGStyleData(const string & style, map<string, string> & results)
 851 {
 852         unsigned i = 0;
 853         string key;
 854         string value;
 855         while (i < style.size() && GetKeyValuePair(style, key, value, i))
 856         {
 857                 results[key] = value;
 858         }
 859 }
 860
 861 /**
 862  * Parse an SVG string into a rectangle
 863  */
 864 void Document::ParseSVG(const string & input, const Rect & bounds)
 865 {
 866         using namespace pugi;
 867
 868         xml_document doc_xml;
 869         xml_parse_result result = doc_xml.load(input.c_str());
 870
 871         if (!result)
 872                 Error("Couldn't parse SVG input - %s", result.description());
 873
 874         Debug("Loaded XML - %s", result.description());
 875         SVGMatrix transform = {bounds.w, 0,bounds.x, 0,bounds.h,bounds.y};
 876         ParseSVGNode(doc_xml, transform);
 877 }
 878
 879 /**
 880  * Load an SVG into a rectangle
 881  */
 882 void Document::LoadSVG(const string & filename, const Rect & bounds)
 883 {
 884         using namespace pugi;
 885
 886         xml_document doc_xml;
 887         ifstream input(filename.c_str(), ios_base::in);
 888         xml_parse_result result = doc_xml.load(input);
 889
 890         if (!result)
 891                 Error("Couldn't load \"%s\" - %s", filename.c_str(), result.description());
 892
 893         Debug("Loaded XML from \"%s\" - %s", filename.c_str(), result.description());
 894
 895         input.close();
 896                                                 // a c e, b d f
 897         SVGMatrix transform = {bounds.w,0 ,bounds.x, 0,bounds.h,bounds.y};
 898         ParseSVGNode(doc_xml, transform);
 899 }
 900
 901
 902
 903 // Fear the wrath of the tokenizing svg data
 904 // Seriously this isn't really very DOM-like at all is it?
 905 pair<unsigned, unsigned> Document::ParseSVGPathData(const string & d, const SVGMatrix & transform, bool & closed)
 906 {
 907         closed = false;
 908         Real x[4] = {0,0,0,0};
 909         Real y[4] = {0,0,0,0};
 910
 911         string token("");
 912         string command("m");
 913
 914         Real x0(0);
 915         Real y0(0);
 916
 917         unsigned i = 0;
 918         unsigned prev_i = 0;
 919
 920         bool start = false;
 921
 922
 923         static string delims("()[],{}<>;:=LlHhVvmMqQzZcC");
 924
 925         pair<unsigned, unsigned> range(m_count, m_count);
 926
 927         while (i < d.size() && GetToken(d, token, i, delims).size() > 0)
 928         {
 929                 if (isalpha(token[0]))
 930                         command = token;
 931                 else
 932                 {
 933                         i = prev_i; // hax
 934                         if(command == "")
 935                                 command = "L";
 936                 }
 937
 938                 bool relative = islower(command[0]);
 939
 940                 if (command == "m" || command == "M")
 941                 {
 942                         //Debug("Construct moveto command");
 943                         Real dx = RealFromStr(GetToken(d,token,i,delims));
 944                         assert(GetToken(d,token,i,delims) == ",");
 945                         Real dy = RealFromStr(GetToken(d,token,i,delims));
 946
 947                         x[0] = (relative) ? x[0] + dx : dx;
 948                         y[0] = (relative) ? y[0] + dy : dy;
 949
 950                         x0 = x[0];
 951                         y0 = y[0];
 952                         //Debug("mmoveto %f,%f", Float(x[0]),Float(y[0]));
 953                         command = (command == "m") ? "l" : "L";
 954                 }
 955                 else if (command == "c" || command == "C" || command == "q" || command == "Q")
 956                 {
 957                         //Debug("Construct curveto command");
 958                         Real dx = RealFromStr(GetToken(d,token,i,delims));
 959                         assert(GetToken(d,token,i,delims) == ",");
 960                         Real dy = RealFromStr(GetToken(d,token,i,delims));
 961
 962                         x[1] = (relative) ? x[0] + dx : dx;
 963                         y[1] = (relative) ? y[0] + dy : dy;
 964
 965                         dx = RealFromStr(GetToken(d,token,i,delims));
 966                         assert(GetToken(d,token,i,delims) == ",");
 967                         dy = RealFromStr(GetToken(d,token,i,delims));
 968
 969                         x[2] = (relative) ? x[0] + dx : dx;
 970                         y[2] = (relative) ? y[0] + dy : dy;
 971
 972                         if (command != "q" && command != "Q")
 973                         {
 974                                 dx = RealFromStr(GetToken(d,token,i,delims));
 975                                 assert(GetToken(d,token,i,delims) == ",");
 976                                 dy = RealFromStr(GetToken(d,token,i,delims));
 977                                 x[3] = (relative) ? x[0] + dx : dx;
 978                                 y[3] = (relative) ? y[0] + dy : dy;
 979                         }
 980                         else
 981                         {
 982                                 x[3] = x[2];
 983                                 y[3] = y[2];
 984                                 Real old_x1(x[1]), old_y1(y[1]);
 985                                 x[1] = x[0] + Real(2) * (old_x1 - x[0])/ Real(3);
 986                                 y[1] = y[0] + Real(2) * (old_y1 - y[0])/ Real(3);
 987                                 x[2] = x[3] + Real(2) * (old_x1 - x[3])/ Real(3);
 988                                 y[2] = y[3] + Real(2) * (old_y1 - y[3])/ Real(3);
 989                         }
 990
 991                         Real x3(x[3]);
 992                         Real y3(y[3]);
 993                         for (int j = 0; j < 4; ++j)
 994                                 TransformXYPair(x[j],y[j], transform);
 995
 996                         range.second = AddBezier(Bezier(x[0],y[0],x[1],y[1],x[2],y[2],x[3],y[3]));
 997
 998                         //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]));
 999
1000                         x[0] = x3;
1001                         y[0] = y3;
1002
1003
1004                 }
1005                 else if (command == "l" || command == "L" || command == "h" || command == "H" || command == "v" || command == "V")
1006                 {
1007                         //Debug("Construct lineto command, relative %d", relative);
1008
1009                         Real dx = RealFromStr(GetToken(d,token,i,delims));
1010                         Real dy = 0;
1011                         if (command == "l" || command == "L")
1012                         {
1013                                 assert(GetToken(d,token,i,delims) == ",");
1014                                 dy = RealFromStr(GetToken(d,token,i,delims));
1015                         }
1016                         else if (command == "v" || command == "V")
1017                         {
1018                                 swap(dx,dy);
1019                         }
1020
1021                         x[1] = (relative) ? x[0] + dx : dx;
1022                         y[1] = (relative) ? y[0] + dy : dy;
1023                         if (command == "v" || command == "V")
1024                         {
1025                                 x[1] = x[0];
1026                         }
1027                         else if (command == "h" || command == "H")
1028                         {
1029                                 y[1] = y[0];
1030                         }
1031
1032                         Real x1(x[1]);
1033                         Real y1(y[1]);
1034
1035                         TransformXYPair(x[0],y[0],transform);
1036                         TransformXYPair(x[1],y[1],transform);
1037
1038
1039                         range.second = AddBezier(Bezier(x[0],y[0],x[1],y[1],x[1],y[1],x[1],y[1]));
1040
1041                         //Debug("[%u] lineto %f,%f %f,%f", index, Float(x[0]),Float(y[0]),Float(x[1]),Float(y[1]));
1042
1043                         x[0] = x1;
1044                         y[0] = y1;
1045
1046                 }
1047                 else if (command == "z" || command == "Z")
1048                 {
1049                         //Debug("Construct returnto command");
1050                         x[1] = x0;
1051                         y[1] = y0;
1052                         x[2] = x0;
1053                         y[2] = y0;
1054                         x[3] = x0;
1055                         y[3] = y0;
1056
1057                         Real x3(x[3]);
1058                         Real y3(y[3]);
1059                         for (int j = 0; j < 4; ++j)
1060                                 TransformXYPair(x[j],y[j], transform);
1061
1062                         range.second = AddBezier(Bezier(x[0],y[0],x[1],y[1],x[2],y[2],x[3],y[3]));
1063                         //Debug("[%u] returnto %f,%f %f,%f", index, Float(x[0]),Float(y[0]),Float(x[1]),Float(y[1]));
1064
1065                         x[0] = x3;
1066                         y[0] = y3;
1067                         command = "m";
1068                         closed = true;
1069                 }
1070                 else
1071                 {
1072                         Warn("Unrecognised command \"%s\", set to \"m\"", command.c_str());
1073                         command = "m";
1074                 }
1075
1076                 if (!start)
1077                 {
1078                         x0 = x[0];
1079                         y0 = y[0];
1080                         start = true;
1081                 }
1082                 prev_i = i;
1083         }
1084         return range;
1085 }
1086
1087 void Document::SetFont(const string & font_filename)
1088 {
1089         if (m_font_data != NULL)
1090         {
1091                 free(m_font_data);
1092         }
1093
1094         FILE *font_file = fopen(font_filename.c_str(), "rb");
1095         fseek(font_file, 0, SEEK_END);
1096         size_t font_file_size = ftell(font_file);
1097         fseek(font_file, 0, SEEK_SET);
1098         m_font_data = (unsigned char*)malloc(font_file_size);
1099         size_t read = fread(m_font_data, 1, font_file_size, font_file);
1100         if (read != font_file_size)
1101         {
1102                 Fatal("Failed to read font data from \"%s\" - Read %u bytes expected %u - %s", font_filename.c_str(), read, font_file_size, strerror(errno));
1103         }
1104         fclose(font_file);
1105         stbtt_InitFont(&m_font, m_font_data, 0);
1106 }
1107
1108 void Document::AddText(const string & text, Real scale, Real x, Real y)
1109 {
1110         if (m_font_data == NULL)
1111         {
1112                 Warn("No font loaded");
1113                 return;
1114         }
1115
1116         Real x0(x);
1117         //Real y0(y);
1118         int ascent = 0, descent = 0, line_gap = 0;
1119         stbtt_GetFontVMetrics(&m_font, &ascent, &descent, &line_gap);
1120         Real font_scale = scale;
1121         font_scale /= Real(ascent - descent);
1122         Real y_advance = Real(font_scale) * Real(ascent - descent + line_gap);
1123         for (unsigned i = 0; i < text.size(); ++i)
1124         {
1125                 if (text[i] == '\n')
1126                 {
1127                         y += y_advance;
1128                         x = x0;
1129                 }
1130                 if (!isprint(text[i]))
1131                         continue;
1132
1133                 int advance_width = 0, left_side_bearing = 0, kerning = 0;
1134                 stbtt_GetCodepointHMetrics(&m_font, text[i], &advance_width, &left_side_bearing);
1135                 if (i >= 1)
1136                 {
1137                         kerning = stbtt_GetCodepointKernAdvance(&m_font, text[i-1], text[i]);
1138                 }
1139                 x += font_scale * Real(kerning);
1140                 AddFontGlyphAtPoint(&m_font, text[i], font_scale, x, y);
1141                 x += font_scale * Real(advance_width);
1142         }
1143 }
1144
1145 void Document::AddFontGlyphAtPoint(stbtt_fontinfo *font, int character, Real scale, Real x, Real y)
1146 {
1147         int glyph_index = stbtt_FindGlyphIndex(font, character);
1148
1149         // Check if there is actully a glyph to render.
1150         if (stbtt_IsGlyphEmpty(font, glyph_index))
1151         {
1152                 return;
1153         }
1154
1155         stbtt_vertex *instructions;
1156         int num_instructions = stbtt_GetGlyphShape(font, glyph_index, &instructions);
1157
1158         Real current_x(0), current_y(0);
1159         unsigned start_index = m_count;
1160         unsigned end_index = m_count;
1161         for (int i = 0; i < num_instructions; ++i)
1162         {
1163                 // TTF uses 16-bit signed ints for coordinates:
1164                 // with the y-axis inverted compared to us.
1165                 // Convert and scale any data.
1166                 Real inst_x = Real(instructions[i].x)*scale;
1167                 Real inst_y = Real(instructions[i].y)*-scale;
1168                 Real inst_cx = Real(instructions[i].cx)*scale;
1169                 Real inst_cy = Real(instructions[i].cy)*-scale;
1170                 Real old_x(current_x), old_y(current_y);
1171                 current_x = inst_x;
1172                 current_y = inst_y;
1173
1174                 switch(instructions[i].type)
1175                 {
1176                 // Move To
1177                 case STBTT_vmove:
1178                         break;
1179                 // Line To
1180                 case STBTT_vline:
1181                         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));
1182                         break;
1183                 // Quadratic Bezier To:
1184                 case STBTT_vcurve:
1185                         // Quadratic -> Cubic:
1186                         // - Endpoints are the same.
1187                         // - cubic1 = quad0+(2/3)*(quad1-quad0)
1188                         // - cubic2 = quad2+(2/3)*(quad1-quad2)
1189                         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,
1190                                                 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));
1191                         break;
1192                 }
1193         }
1194
1195         if (start_index < m_count && end_index < m_count)
1196         {
1197                 AddPath(start_index, end_index);
1198         }
1199         //Debug("Added Glyph \"%c\" at %f %f, scale %f", (char)character, Float(x), Float(y), Float(scale));
1200
1201         stbtt_FreeShape(font, instructions);
1202 }
1203
1204 void Document::TransformObjectBounds(const SVGMatrix & transform, ObjectType type)
1205 {
1206         #ifdef TRANSFORM_BEZIERS_TO_PATH
1207                 for (unsigned i = 0; i < m_objects.paths.size(); ++i)
1208                 {
1209                         Path & p = m_objects.paths[i];
1210                         p.m_bounds.x = transform.a * p.m_bounds.x + transform.e;
1211                         p.m_bounds.y = transform.d * p.m_bounds.y + transform.f;
1212                         p.m_bounds.w *= transform.a;
1213                         p.m_bounds.h *= transform.d;
1214                 }
1215                 return;
1216         #endif
1217
1218         for (unsigned i = 0; i < m_count; ++i)
1219         {
1220                 if (type == NUMBER_OF_OBJECT_TYPES || m_objects.types[i] == type)
1221                 {
1222                         TransformXYPair(m_objects.bounds[i].x, m_objects.bounds[i].y, transform);
1223                         m_objects.bounds[i].w *= transform.a;
1224                         m_objects.bounds[i].h *= transform.d;
1225                 }
1226         }
1227 }
1228
1229 void Document::TranslateObjects(const Real & dx, const Real & dy, ObjectType type)
1230 {
1231         #ifdef TRANSFORM_BEZIERS_TO_PATH
1232         for (unsigned i = 0; i < m_objects.paths.size(); ++i)
1233         {
1234                 Path & p = m_objects.paths[i];
1235                 p.m_bounds.x += dx;
1236                 p.m_bounds.y += dy;
1237         }
1238         return;
1239         #endif
1240
1241         for (unsigned i = 0; i < m_count; ++i)
1242         {
1243                 if (type == NUMBER_OF_OBJECT_TYPES || m_objects.types[i] == type)
1244                 {
1245                         m_objects.bounds[i].x += dx;
1246                         m_objects.bounds[i].y += dy;
1247                 }
1248         }
1249 }
1250
1251 void Document::ScaleObjectsAboutPoint(const Real & x, const Real & y, const Real & scale_amount, ObjectType type)
1252 {
1253         #ifdef TRANSFORM_BEZIERS_TO_PATH
1254                 for (unsigned i = 0; i < m_objects.paths.size(); ++i)
1255                 {
1256                         Path & p = m_objects.paths[i];
1257                         p.m_bounds.w /= scale_amount;
1258                         p.m_bounds.h /= scale_amount;
1259                         p.m_bounds.x -= x;
1260                         p.m_bounds.x /= scale_amount;
1261                         p.m_bounds.x += x;
1262                         p.m_bounds.y -= y;
1263                         p.m_bounds.y /= scale_amount;
1264                         p.m_bounds.y += y;
1265                 }
1266                 return;
1267         #endif
1268
1269         for (unsigned i = 0; i < m_count; ++i)
1270         {
1271                 if (type != NUMBER_OF_OBJECT_TYPES && m_objects.types[i] != type)
1272                         continue;
1273
1274                 m_objects.bounds[i].w /= scale_amount;
1275                 m_objects.bounds[i].h /= scale_amount;
1276                 //m_objects.bounds[i].x = x + (m_objects.bounds[i].x-x)/scale_amount;
1277                 //m_objects.bounds[i].y = y + (m_objects.bounds[i].y-x)/scale_amount;
1278                 m_objects.bounds[i].x -= x;
1279                 m_objects.bounds[i].x /= scale_amount;
1280                 m_objects.bounds[i].x += x;
1281
1282                 m_objects.bounds[i].y -= y;
1283                 m_objects.bounds[i].y /= scale_amount;
1284                 m_objects.bounds[i].y += y;
1285         }
1286
1287 }
1288
1289