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 // Adds an object to the Document, clipping it to m_clip_rect.
 461 // Helper function called by Document::Add()
 462 int Document::AddClip(ObjectType type, const Rect& bounds, unsigned data_index, const Rect& clip_rect)
 463 {
 464         PROFILE_SCOPE("Document::AddAndClip");
 465         switch (type)
 466         {
 467         case RECT_FILLED:
 468         case RECT_OUTLINE:
 469         case PATH:
 470                 {
 471                 Rect obj_bounds = clip_rect.Clip(bounds);
 472                 m_objects.bounds.push_back(obj_bounds);
 473                 m_objects.types.push_back(type);
 474                 m_objects.data_indices.push_back(data_index);
 475                 return 1;
 476                 }
 477         case BEZIER:
 478                 {
 479                 // If we're entirely within the clipping rect, no clipping need occur.
 480                 if (clip_rect.Contains(bounds))
 481                 {
 482                         m_objects.bounds.push_back(bounds);
 483                         m_objects.types.push_back(type);
 484                         m_objects.data_indices.push_back(data_index);
 485                         return 1;
 486                 }
 487                 Rect clip_bezier_bounds = TransformRectCoordinates(bounds, clip_rect);
 488                 std::vector<Bezier> new_curves = m_objects.beziers[data_index].ClipToRectangle(clip_bezier_bounds);
 489                 for (size_t i = 0; i < new_curves.size(); ++i)
 490                 {
 491                         Bezier new_curve_data = new_curves[i].ToAbsolute(bounds);
 492                         Rect new_bounds = new_curve_data.SolveBounds();
 493                         new_curve_data = new_curve_data.ToRelative(new_bounds);
 494                         unsigned index = AddBezierData(new_curve_data);
 495                         m_objects.bounds.push_back(new_bounds);
 496                         m_objects.types.push_back(BEZIER);
 497                         m_objects.data_indices.push_back(index);
 498                 }
 499                 return new_curves.size();
 500                 }
 501         default:
 502                 m_objects.bounds.push_back(bounds);
 503                 m_objects.types.push_back(type);
 504                 m_objects.data_indices.push_back(data_index);
 505                 return 1;
 506         }
 507         return 0;
 508 }
 509
 510 unsigned Document::Add(ObjectType type, const Rect & bounds, unsigned data_index, QuadTreeIndex qti)
 511 {
 512         PROFILE_SCOPE("Document::Add");
 513         Rect new_bounds = bounds;
 514         int num_added = 1;
 515         bool still_to_add = true;
 516 #ifndef QUADTREE_DISABLED
 517         if (qti == -1) qti = m_current_insert_node;
 518         if (qti != -1)
 519         {
 520                 // Move the object to the quadtree node it should be in.
 521                 m_quadtree.GetCanonicalCoords(qti, new_bounds.x, new_bounds.y, this);
 522                 Rect cliprect = Rect(0,0,1,1);
 523                 // If an object spans multiple quadtree nodes...
 524                 if (!cliprect.Contains(new_bounds))
 525                 {
 526                         num_added = AddClip(type, new_bounds, data_index, cliprect);
 527                         still_to_add = false;
 528                 }
 529         }
 530 #endif
 531         if (still_to_add)
 532         {
 533                 m_objects.types.push_back(type);
 534                 m_objects.bounds.push_back(new_bounds);
 535                 m_objects.data_indices.push_back(data_index);
 536         }
 537 #ifndef QUADTREE_DISABLED
 538         if (qti != -1)
 539         {
 540                 QuadTreeIndex new_qti = qti;
 541                 while (m_quadtree.nodes[new_qti].next_overlay != -1)
 542                 {
 543                         if (m_count == m_quadtree.nodes[new_qti].object_end+1)
 544                         {
 545                                 m_quadtree.nodes[new_qti].object_end += num_added;
 546                                 goto done;
 547                         }
 548                         new_qti = m_quadtree.nodes[new_qti].next_overlay;
 549                 }
 550                 {
 551                         QuadTreeIndex overlay = m_quadtree.nodes.size();
 552                         Debug("Adding new overlay, nqti = %d, overlay = %d", new_qti, overlay);
 553                         m_quadtree.nodes.push_back(m_quadtree.nodes[qti]);
 554                         m_quadtree.nodes[overlay].object_begin = m_count;
 555                         // All objects are dirty.
 556                         m_quadtree.nodes[overlay].object_dirty = m_count;
 557                         m_quadtree.nodes[overlay].object_end = m_count+num_added;
 558                         m_quadtree.nodes[overlay].next_overlay = -1;
 559                         m_quadtree.nodes[new_qti].next_overlay = overlay;
 560                         new_qti = overlay;
 561                 }
 562 done: // matches is not amused, but sulix is nice and moved it inside the #ifdef for him.
 563                 m_count += num_added;
 564         }
 565         return m_count-num_added;
 566 #else // words fail me (still not amused)
 567         return (m_count++);
 568 #endif
 569
 570 }
 571
 572 unsigned Document::AddBezierData(const Bezier & bezier)
 573 {
 574         m_objects.beziers.push_back(bezier);
 575         return m_objects.beziers.size()-1;
 576 }
 577
 578 unsigned Document::AddPathData(const Path & path)
 579 {
 580         m_objects.paths.push_back(path);
 581         return m_objects.paths.size()-1;
 582 }
 583
 584 void Document::DebugDumpObjects()
 585 {
 586         Debug("Objects for Document %p are:", this);
 587         for (unsigned id = 0; id < ObjectCount(); ++id)
 588         {
 589                 Debug("%u. \tType: %u\tBounds: %s", id, m_objects.types[id], m_objects.bounds[id].Str().c_str());
 590         }
 591 }
 592
 593 bool Document::operator==(const Document & equ) const
 594 {
 595         return (ObjectCount() == equ.ObjectCount()
 596                 && memcmp(m_objects.bounds.data(), equ.m_objects.bounds.data(), ObjectCount() * sizeof(Rect)) == 0
 597                 && memcmp(m_objects.data_indices.data(), equ.m_objects.data_indices.data(), ObjectCount() * sizeof(unsigned)) == 0
 598                 && memcmp(m_objects.beziers.data(), equ.m_objects.beziers.data(), m_objects.beziers.size() * sizeof(Bezier)) == 0);
 599 }
 600
 601
 602
 603 // Behold my amazing tokenizing abilities
 604 static string & GetToken(const string & d, string & token, unsigned & i, const string & delims = "()[],{}<>;:=")
 605 {
 606         token.clear();
 607         while (i < d.size() && iswspace(d[i]))
 608         {
 609                 ++i;
 610         }
 611
 612         while (i < d.size())
 613         {
 614                 if (iswspace(d[i]) || strchr(delims.c_str(),d[i]) != NULL)
 615                 {
 616                         if (token.size() == 0 && !iswspace(d[i]))
 617                         {
 618                                 token += d[i++];
 619                         }
 620                         break;
 621                 }
 622                 token += d[i++];
 623         }
 624         //Debug("Got token \"%s\"", token.c_str());
 625         return token;
 626 }
 627
 628 static void GetXYPair(const string & d, Real & x, Real & y, unsigned & i,const string & delims = "()[],{}<>;:=")
 629 {
 630         string token("");
 631         while (GetToken(d, token, i, delims) == ",");
 632         x = RealFromStr(token);
 633         if (GetToken(d, token, i, delims) != ",")
 634         {
 635                 Fatal("Expected \",\" seperating x,y pair");
 636         }
 637         y = RealFromStr(GetToken(d,token,i,delims));
 638 }
 639
 640 static bool GetKeyValuePair(const string & d, string & key, string & value, unsigned & i, const string & delims = "()[],{}<>;:=")
 641 {
 642         key = "";
 643         string token;
 644         while (GetToken(d, token, i, delims) == ":" || token == ";");
 645         key = token;
 646         if (GetToken(d, token, i, delims) != ":")
 647         {
 648                 Error("Expected \":\" seperating key:value pair");
 649                 return false;
 650         }
 651         value = "";
 652         GetToken(d, value, i, delims);
 653         return true;
 654 }
 655
 656 static void TransformXYPair(Real & x, Real & y, const SVGMatrix & transform)
 657 {
 658         Real x0(x);
 659         x = transform.a * x + transform.c * y + transform.e;
 660         y = transform.b * x0 + transform.d * y + transform.f;
 661 }
 662
 663 void Document::ParseSVGTransform(const string & s, SVGMatrix & transform)
 664 {
 665         //Debug("Parsing transform %s", s.c_str());
 666         string token;
 667         string command;
 668         unsigned i = 0;
 669
 670         while (i < s.size())
 671         {
 672                 GetToken(s, command, i);
 673                 if (command == "," || command == "" || command == ":")
 674                 {
 675                         if (i < s.size())
 676                                 GetToken(s, command, i);
 677                         else
 678                                 return;
 679                 }
 680                 //Debug("Token is \"%s\"", command.c_str());
 681
 682                 SVGMatrix delta = {1,0,0,0,1,0};
 683
 684
 685                 assert(GetToken(s,token, i) == "(");
 686                 if (command == "translate")
 687                 {
 688                         GetXYPair(s, delta.e, delta.f, i);
 689                         assert(GetToken(s,token, i) == ")");
 690                 }
 691                 else if (command == "matrix")
 692                 {
 693                         GetXYPair(s, delta.a, delta.b,i);
 694                         GetXYPair(s, delta.c, delta.d,i);
 695                         GetXYPair(s, delta.e, delta.f,i);
 696                         assert(GetToken(s,token, i) == ")");
 697                 }
 698                 else if (command == "scale")
 699                 {
 700                         delta.a = RealFromStr(GetToken(s,token,i));
 701                         GetToken(s, token, i);
 702                         if (token == ",")
 703                         {
 704                                 delta.d = RealFromStr(GetToken(s,token,i));
 705                                 assert(GetToken(s, token, i) == ")");
 706                         }
 707                         else
 708                         {
 709                                 delta.d = delta.a;
 710                                 assert(token == ")");
 711                         }
 712
 713                 }
 714                 else
 715                 {
 716                         Warn("Unrecognised transform \"%s\", using identity", command.c_str());
 717                 }
 718
 719                 //Debug("Old transform is {%f,%f,%f,%f,%f,%f}", transform.a, transform.b, transform.c, transform.d,transform.e,transform.f);
 720                 //Debug("Delta transform is {%f,%f,%f,%f,%f,%f}", delta.a, delta.b, delta.c, delta.d,delta.e,delta.f);
 721
 722                 SVGMatrix old(transform);
 723                 transform.a = old.a * delta.a + old.c * delta.b;
 724                 transform.c = old.a * delta.c + old.c * delta.d;
 725                 transform.e = old.a * delta.e + old.c * delta.f + old.e;
 726
 727                 transform.b = old.b * delta.a + old.d * delta.b;
 728                 transform.d = old.b * delta.c + old.d * delta.d;
 729                 transform.f = old.b * delta.e + old.d * delta.f + old.f;
 730
 731                 //Debug("New transform is {%f,%f,%f,%f,%f,%f}", transform.a, transform.b, transform.c, transform.d,transform.e,transform.f);
 732         }
 733 }
 734
 735 inline Colour ParseColourString(const string & colour_str)
 736 {
 737         Colour c(0,0,0,0);
 738         if (colour_str == "red")
 739                 c = {255,0,0,255};
 740         else if (colour_str == "blue")
 741                 c = {0,0,255,255};
 742         else if (colour_str == "green")
 743                 c = {0,255,0,255};
 744         else if (colour_str == "black")
 745                 c = {0,0,0,255};
 746         else if (colour_str == "white")
 747                 c = {255,255,255,255};
 748         else if (colour_str.size() == 7 && colour_str[0] == '#')
 749         {
 750                 //Debug("Parse colour string: \"%s\"", colour_str.c_str());
 751                 char comp[3] = {colour_str[1], colour_str[2], '\0'};
 752                 c.r = strtoul(comp, NULL, 16);
 753                 comp[0] = colour_str[3]; comp[1] = colour_str[4];
 754                 c.g = strtoul(comp, NULL, 16);
 755                 comp[0] = colour_str[5]; comp[1] = colour_str[6];
 756                 c.b = strtoul(comp, NULL, 16);
 757                 c.a = 255;
 758                 //Debug("Colour is: %u, %u, %u, %u", c.r, c.g, c.b, c.a);
 759         }
 760         return c;
 761 }
 762
 763 void Document::ParseSVGNode(pugi::xml_node & root, SVGMatrix & parent_transform)
 764 {
 765         //Debug("Parse node <%s>", root.name());
 766
 767
 768         // Centre the SVGs
 769         if (strcmp(root.name(),"svg") == 0)
 770         {
 771                 Real ww = RealFromStr(root.attribute("width").as_string());
 772                 Real hh = RealFromStr(root.attribute("height").as_string());
 773                 parent_transform.e -= parent_transform.a * ww/Real(2);
 774                 parent_transform.f -= parent_transform.d * hh/Real(2);
 775         }
 776
 777         for (pugi::xml_node child = root.first_child(); child; child = child.next_sibling())
 778         {
 779                 SVGMatrix transform(parent_transform);
 780                 pugi::xml_attribute attrib_trans = child.attribute("transform");
 781                 if (!attrib_trans.empty())
 782                 {
 783                         ParseSVGTransform(attrib_trans.as_string(), transform);
 784                 }
 785
 786
 787
 788                 if (strcmp(child.name(), "svg") == 0 || strcmp(child.name(),"g") == 0
 789                         || strcmp(child.name(), "group") == 0)
 790                 {
 791
 792                         ParseSVGNode(child, transform);
 793                         continue;
 794                 }
 795                 else if (strcmp(child.name(), "path") == 0)
 796                 {
 797                         string d = child.attribute("d").as_string();
 798                         //Debug("Path data attribute is \"%s\"", d.c_str());
 799                         bool closed = false;
 800                         pair<unsigned, unsigned> range = ParseSVGPathData(d, transform, closed);
 801                         if (true && range.first < m_count && range.second < m_count)//(closed)
 802                         {
 803
 804                                 string colour_str("");
 805                                 map<string, string> style;
 806                                 if (child.attribute("style"))
 807                                 {
 808                                         ParseSVGStyleData(child.attribute("style").as_string(), style);
 809                                 }
 810
 811                                 // Determine shading colour
 812                                 if (child.attribute("fill"))
 813                                 {
 814                                         colour_str = child.attribute("fill").as_string();
 815                                 }
 816                                 else if (style.find("fill") != style.end())
 817                                 {
 818                                         colour_str = style["fill"];
 819                                 }
 820                                 Colour fill = ParseColourString(colour_str);
 821                                 Colour stroke = fill;
 822
 823                                 if (child.attribute("stroke"))
 824                                 {
 825                                         colour_str = child.attribute("stroke").as_string();
 826                                         stroke = ParseColourString(colour_str);
 827                                 }
 828                                 else if (style.find("stroke") != style.end())
 829                                 {
 830                                         colour_str = style["stroke"];
 831                                         stroke = ParseColourString(colour_str);
 832                                 }
 833
 834
 835                                 // Determin shading alpha
 836                                 if (child.attribute("fill-opacity"))
 837                                 {
 838                                         fill.a = 255*child.attribute("fill-opacity").as_float();
 839                                 }
 840                                 else if (style.find("fill-opacity") != style.end())
 841                                 {
 842                                         fill.a = 255*strtod(style["fill-opacity"].c_str(), NULL);
 843                                 }
 844                                 if (child.attribute("stroke-opacity"))
 845                                 {
 846                                         stroke.a = 255*child.attribute("stroke-opacity").as_float();
 847                                 }
 848                                 else if (style.find("stroke-opacity") != style.end())
 849                                 {
 850                                         stroke.a = 255*strtod(style["stroke-opacity"].c_str(), NULL);
 851                                 }
 852                                 AddPath(range.first, range.second, fill, stroke);
 853                         }
 854
 855                 }
 856                 else if (strcmp(child.name(), "line") == 0)
 857                 {
 858                         Real x0(child.attribute("x1").as_float());
 859                         Real y0(child.attribute("y1").as_float());
 860                         Real x1(child.attribute("x2").as_float());
 861                         Real y1(child.attribute("y2").as_float());
 862                         TransformXYPair(x0,y0,transform);
 863                         TransformXYPair(x1,y1,transform);
 864                         AddBezier(Bezier(x0,y0,x1,y1,x1,y1,x1,y1));
 865                 }
 866                 else if (strcmp(child.name(), "rect") == 0)
 867                 {
 868                         Real coords[4];
 869                         const char * attrib_names[] = {"x", "y", "width", "height"};
 870                         for (size_t i = 0; i < 4; ++i)
 871                                 coords[i] = child.attribute(attrib_names[i]).as_float();
 872
 873                         Real x2(coords[0]+coords[2]);
 874                         Real y2(coords[1]+coords[3]);
 875                         TransformXYPair(coords[0],coords[1],transform); // x, y, transform
 876                         TransformXYPair(x2,y2,transform);
 877                         coords[2] = x2 - coords[0];
 878                         coords[3] = y2 - coords[1];
 879
 880                         bool outline = !(child.attribute("fill") && strcmp(child.attribute("fill").as_string(),"none") != 0);
 881                         Add(outline?RECT_OUTLINE:RECT_FILLED, Rect(coords[0], coords[1], coords[2], coords[3]),0);
 882                 }
 883                 else if (strcmp(child.name(), "circle") == 0)
 884                 {
 885                         Real cx = child.attribute("cx").as_float();
 886                         Real cy = child.attribute("cy").as_float();
 887                         Real r = child.attribute("r").as_float();
 888
 889                         Real x = (cx - r);
 890                         Real y = (cy - r);
 891                         TransformXYPair(x,y,transform);
 892                         Real w = Real(2)*r*transform.a; // width scales
 893                         Real h = Real(2)*r*transform.d; // height scales
 894
 895
 896                         Rect rect(x,y,w,h);
 897                         Add(CIRCLE_FILLED, rect,0);
 898                         Debug("Added Circle %s", rect.Str().c_str());
 899                 }
 900                 else if (strcmp(child.name(), "text") == 0)
 901                 {
 902                         Real x = child.attribute("x").as_float();
 903                         Real y = child.attribute("y").as_float();
 904                         TransformXYPair(x,y,transform);
 905                         Debug("Add text \"%s\"", child.child_value());
 906                         AddText(child.child_value(), 0.05, x, y);
 907                 }
 908         }
 909 }
 910
 911 void Document::ParseSVGStyleData(const string & style, map<string, string> & results)
 912 {
 913         unsigned i = 0;
 914         string key;
 915         string value;
 916         while (i < style.size() && GetKeyValuePair(style, key, value, i))
 917         {
 918                 results[key] = value;
 919         }
 920 }
 921
 922 /**
 923  * Parse an SVG string into a rectangle
 924  */
 925 void Document::ParseSVG(const string & input, const Rect & bounds)
 926 {
 927         using namespace pugi;
 928
 929         xml_document doc_xml;
 930         xml_parse_result result = doc_xml.load(input.c_str());
 931
 932         if (!result)
 933                 Error("Couldn't parse SVG input - %s", result.description());
 934
 935         Debug("Loaded XML - %s", result.description());
 936         SVGMatrix transform = {bounds.w, 0,bounds.x, 0,bounds.h,bounds.y};
 937         ParseSVGNode(doc_xml, transform);
 938 }
 939
 940 /**
 941  * Load an SVG into a rectangle
 942  */
 943 void Document::LoadSVG(const string & filename, const Rect & bounds)
 944 {
 945         using namespace pugi;
 946
 947         xml_document doc_xml;
 948         ifstream input(filename.c_str(), ios_base::in);
 949         xml_parse_result result = doc_xml.load(input);
 950
 951         if (!result)
 952                 Error("Couldn't load \"%s\" - %s", filename.c_str(), result.description());
 953
 954         Debug("Loaded XML from \"%s\" - %s", filename.c_str(), result.description());
 955
 956         input.close();
 957                                                 // a c e, b d f
 958         SVGMatrix transform = {bounds.w,0 ,bounds.x, 0,bounds.h,bounds.y};
 959         ParseSVGNode(doc_xml, transform);
 960 }
 961
 962
 963
 964 // Fear the wrath of the tokenizing svg data
 965 // Seriously this isn't really very DOM-like at all is it?
 966 pair<unsigned, unsigned> Document::ParseSVGPathData(const string & d, const SVGMatrix & transform, bool & closed)
 967 {
 968         closed = false;
 969         Real x[4] = {0,0,0,0};
 970         Real y[4] = {0,0,0,0};
 971
 972         string token("");
 973         string command("m");
 974
 975         Real x0(0);
 976         Real y0(0);
 977
 978         unsigned i = 0;
 979         unsigned prev_i = 0;
 980
 981         bool start = false;
 982
 983
 984         static string delims("()[],{}<>;:=LlHhVvmMqQzZcC");
 985
 986         pair<unsigned, unsigned> range(m_count, m_count);
 987
 988         while (i < d.size() && GetToken(d, token, i, delims).size() > 0)
 989         {
 990                 if (isalpha(token[0]))
 991                         command = token;
 992                 else
 993                 {
 994                         i = prev_i; // hax
 995                         if(command == "")
 996                                 command = "L";
 997                 }
 998
 999                 bool relative = islower(command[0]);
1000
1001                 if (command == "m" || command == "M")
1002                 {
1003                         //Debug("Construct moveto command");
1004                         Real dx = RealFromStr(GetToken(d,token,i,delims));
1005                         assert(GetToken(d,token,i,delims) == ",");
1006                         Real dy = RealFromStr(GetToken(d,token,i,delims));
1007
1008                         x[0] = (relative) ? x[0] + dx : dx;
1009                         y[0] = (relative) ? y[0] + dy : dy;
1010
1011                         x0 = x[0];
1012                         y0 = y[0];
1013                         //Debug("mmoveto %f,%f", Float(x[0]),Float(y[0]));
1014                         command = (command == "m") ? "l" : "L";
1015                 }
1016                 else if (command == "c" || command == "C" || command == "q" || command == "Q")
1017                 {
1018                         //Debug("Construct curveto command");
1019                         Real dx = RealFromStr(GetToken(d,token,i,delims));
1020                         assert(GetToken(d,token,i,delims) == ",");
1021                         Real dy = RealFromStr(GetToken(d,token,i,delims));
1022
1023                         x[1] = (relative) ? x[0] + dx : dx;
1024                         y[1] = (relative) ? y[0] + dy : dy;
1025
1026                         dx = RealFromStr(GetToken(d,token,i,delims));
1027                         assert(GetToken(d,token,i,delims) == ",");
1028                         dy = RealFromStr(GetToken(d,token,i,delims));
1029
1030                         x[2] = (relative) ? x[0] + dx : dx;
1031                         y[2] = (relative) ? y[0] + dy : dy;
1032
1033                         if (command != "q" && command != "Q")
1034                         {
1035                                 dx = RealFromStr(GetToken(d,token,i,delims));
1036                                 assert(GetToken(d,token,i,delims) == ",");
1037                                 dy = RealFromStr(GetToken(d,token,i,delims));
1038                                 x[3] = (relative) ? x[0] + dx : dx;
1039                                 y[3] = (relative) ? y[0] + dy : dy;
1040                         }
1041                         else
1042                         {
1043                                 x[3] = x[2];
1044                                 y[3] = y[2];
1045                                 Real old_x1(x[1]), old_y1(y[1]);
1046                                 x[1] = x[0] + Real(2) * (old_x1 - x[0])/ Real(3);
1047                                 y[1] = y[0] + Real(2) * (old_y1 - y[0])/ Real(3);
1048                                 x[2] = x[3] + Real(2) * (old_x1 - x[3])/ Real(3);
1049                                 y[2] = y[3] + Real(2) * (old_y1 - y[3])/ Real(3);
1050                         }
1051
1052                         Real x3(x[3]);
1053                         Real y3(y[3]);
1054                         for (int j = 0; j < 4; ++j)
1055                                 TransformXYPair(x[j],y[j], transform);
1056
1057                         range.second = AddBezier(Bezier(x[0],y[0],x[1],y[1],x[2],y[2],x[3],y[3]));
1058
1059                         //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]));
1060
1061                         x[0] = x3;
1062                         y[0] = y3;
1063
1064
1065                 }
1066                 else if (command == "l" || command == "L" || command == "h" || command == "H" || command == "v" || command == "V")
1067                 {
1068                         //Debug("Construct lineto command, relative %d", relative);
1069
1070                         Real dx = RealFromStr(GetToken(d,token,i,delims));
1071                         Real dy = 0;
1072                         if (command == "l" || command == "L")
1073                         {
1074                                 assert(GetToken(d,token,i,delims) == ",");
1075                                 dy = RealFromStr(GetToken(d,token,i,delims));
1076                         }
1077                         else if (command == "v" || command == "V")
1078                         {
1079                                 swap(dx,dy);
1080                         }
1081
1082                         x[1] = (relative) ? x[0] + dx : dx;
1083                         y[1] = (relative) ? y[0] + dy : dy;
1084                         if (command == "v" || command == "V")
1085                         {
1086                                 x[1] = x[0];
1087                         }
1088                         else if (command == "h" || command == "H")
1089                         {
1090                                 y[1] = y[0];
1091                         }
1092
1093                         Real x1(x[1]);
1094                         Real y1(y[1]);
1095
1096                         TransformXYPair(x[0],y[0],transform);
1097                         TransformXYPair(x[1],y[1],transform);
1098
1099
1100                         range.second = AddBezier(Bezier(x[0],y[0],x[1],y[1],x[1],y[1],x[1],y[1]));
1101
1102                         //Debug("[%u] lineto %f,%f %f,%f", index, Float(x[0]),Float(y[0]),Float(x[1]),Float(y[1]));
1103
1104                         x[0] = x1;
1105                         y[0] = y1;
1106
1107                 }
1108                 else if (command == "z" || command == "Z")
1109                 {
1110                         //Debug("Construct returnto command");
1111                         x[1] = x0;
1112                         y[1] = y0;
1113                         x[2] = x0;
1114                         y[2] = y0;
1115                         x[3] = x0;
1116                         y[3] = y0;
1117
1118                         Real x3(x[3]);
1119                         Real y3(y[3]);
1120                         for (int j = 0; j < 4; ++j)
1121                                 TransformXYPair(x[j],y[j], transform);
1122
1123                         range.second = AddBezier(Bezier(x[0],y[0],x[1],y[1],x[2],y[2],x[3],y[3]));
1124                         //Debug("[%u] returnto %f,%f %f,%f", index, Float(x[0]),Float(y[0]),Float(x[1]),Float(y[1]));
1125
1126                         x[0] = x3;
1127                         y[0] = y3;
1128                         command = "m";
1129                         closed = true;
1130                 }
1131                 else
1132                 {
1133                         Warn("Unrecognised command \"%s\", set to \"m\"", command.c_str());
1134                         command = "m";
1135                 }
1136
1137                 if (!start)
1138                 {
1139                         x0 = x[0];
1140                         y0 = y[0];
1141                         start = true;
1142                 }
1143                 prev_i = i;
1144         }
1145         return range;
1146 }
1147
1148 void Document::SetFont(const string & font_filename)
1149 {
1150         if (m_font_data != NULL)
1151         {
1152                 free(m_font_data);
1153         }
1154
1155         FILE *font_file = fopen(font_filename.c_str(), "rb");
1156         fseek(font_file, 0, SEEK_END);
1157         size_t font_file_size = ftell(font_file);
1158         fseek(font_file, 0, SEEK_SET);
1159         m_font_data = (unsigned char*)malloc(font_file_size);
1160         size_t read = fread(m_font_data, 1, font_file_size, font_file);
1161         if (read != font_file_size)
1162         {
1163                 Fatal("Failed to read font data from \"%s\" - Read %u bytes expected %u - %s", font_filename.c_str(), read, font_file_size, strerror(errno));
1164         }
1165         fclose(font_file);
1166         stbtt_InitFont(&m_font, m_font_data, 0);
1167 }
1168
1169 void Document::AddText(const string & text, Real scale, Real x, Real y)
1170 {
1171         if (m_font_data == NULL)
1172         {
1173                 Warn("No font loaded");
1174                 return;
1175         }
1176
1177         Real x0(x);
1178         //Real y0(y);
1179         int ascent = 0, descent = 0, line_gap = 0;
1180         stbtt_GetFontVMetrics(&m_font, &ascent, &descent, &line_gap);
1181         Real font_scale = scale;
1182         font_scale /= Real(ascent - descent);
1183         Real y_advance = Real(font_scale) * Real(ascent - descent + line_gap);
1184         for (unsigned i = 0; i < text.size(); ++i)
1185         {
1186                 if (text[i] == '\n')
1187                 {
1188                         y += y_advance;
1189                         x = x0;
1190                 }
1191                 if (!isprint(text[i]))
1192                         continue;
1193
1194                 int advance_width = 0, left_side_bearing = 0, kerning = 0;
1195                 stbtt_GetCodepointHMetrics(&m_font, text[i], &advance_width, &left_side_bearing);
1196                 if (i >= 1)
1197                 {
1198                         kerning = stbtt_GetCodepointKernAdvance(&m_font, text[i-1], text[i]);
1199                 }
1200                 x += font_scale * Real(kerning);
1201                 AddFontGlyphAtPoint(&m_font, text[i], font_scale, x, y);
1202                 x += font_scale * Real(advance_width);
1203         }
1204 }
1205
1206 void Document::AddFontGlyphAtPoint(stbtt_fontinfo *font, int character, Real scale, Real x, Real y)
1207 {
1208         int glyph_index = stbtt_FindGlyphIndex(font, character);
1209
1210         // Check if there is actully a glyph to render.
1211         if (stbtt_IsGlyphEmpty(font, glyph_index))
1212         {
1213                 return;
1214         }
1215
1216         stbtt_vertex *instructions;
1217         int num_instructions = stbtt_GetGlyphShape(font, glyph_index, &instructions);
1218
1219         Real current_x(0), current_y(0);
1220         unsigned start_index = m_count;
1221         unsigned end_index = m_count;
1222         for (int i = 0; i < num_instructions; ++i)
1223         {
1224                 // TTF uses 16-bit signed ints for coordinates:
1225                 // with the y-axis inverted compared to us.
1226                 // Convert and scale any data.
1227                 Real inst_x = Real(instructions[i].x)*scale;
1228                 Real inst_y = Real(instructions[i].y)*-scale;
1229                 Real inst_cx = Real(instructions[i].cx)*scale;
1230                 Real inst_cy = Real(instructions[i].cy)*-scale;
1231                 Real old_x(current_x), old_y(current_y);
1232                 current_x = inst_x;
1233                 current_y = inst_y;
1234
1235                 switch(instructions[i].type)
1236                 {
1237                 // Move To
1238                 case STBTT_vmove:
1239                         break;
1240                 // Line To
1241                 case STBTT_vline:
1242                         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));
1243                         break;
1244                 // Quadratic Bezier To:
1245                 case STBTT_vcurve:
1246                         // Quadratic -> Cubic:
1247                         // - Endpoints are the same.
1248                         // - cubic1 = quad0+(2/3)*(quad1-quad0)
1249                         // - cubic2 = quad2+(2/3)*(quad1-quad2)
1250                         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,
1251                                                 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));
1252                         break;
1253                 }
1254         }
1255
1256         if (start_index < m_count && end_index < m_count)
1257         {
1258                 AddPath(start_index, end_index);
1259         }
1260         //Debug("Added Glyph \"%c\" at %f %f, scale %f", (char)character, Float(x), Float(y), Float(scale));
1261
1262         stbtt_FreeShape(font, instructions);
1263 }
1264
1265 void Document::TransformObjectBounds(const SVGMatrix & transform, ObjectType type)
1266 {
1267         #ifdef TRANSFORM_BEZIERS_TO_PATH
1268                 for (unsigned i = 0; i < m_objects.paths.size(); ++i)
1269                 {
1270                         Path & p = m_objects.paths[i];
1271                         p.m_bounds.x = transform.a * p.m_bounds.x + transform.e;
1272                         p.m_bounds.y = transform.d * p.m_bounds.y + transform.f;
1273                         p.m_bounds.w *= transform.a;
1274                         p.m_bounds.h *= transform.d;
1275                 }
1276                 return;
1277         #endif
1278
1279         for (unsigned i = 0; i < m_count; ++i)
1280         {
1281                 if (type == NUMBER_OF_OBJECT_TYPES || m_objects.types[i] == type)
1282                 {
1283                         TransformXYPair(m_objects.bounds[i].x, m_objects.bounds[i].y, transform);
1284                         m_objects.bounds[i].w *= transform.a;
1285                         m_objects.bounds[i].h *= transform.d;
1286                 }
1287         }
1288 }
1289
1290 void Document::TranslateObjects(const Real & dx, const Real & dy, ObjectType type)
1291 {
1292         #ifdef TRANSFORM_BEZIERS_TO_PATH
1293         for (unsigned i = 0; i < m_objects.paths.size(); ++i)
1294         {
1295                 Path & p = m_objects.paths[i];
1296                 p.m_bounds.x += dx;
1297                 p.m_bounds.y += dy;
1298         }
1299         return;
1300         #endif
1301
1302         for (unsigned i = 0; i < m_count; ++i)
1303         {
1304                 if (type == NUMBER_OF_OBJECT_TYPES || m_objects.types[i] == type)
1305                 {
1306                         m_objects.bounds[i].x += dx;
1307                         m_objects.bounds[i].y += dy;
1308                 }
1309         }
1310 }
1311
1312 void Document::ScaleObjectsAboutPoint(const Real & x, const Real & y, const Real & scale_amount, ObjectType type)
1313 {
1314         #ifdef TRANSFORM_BEZIERS_TO_PATH
1315                 for (unsigned i = 0; i < m_objects.paths.size(); ++i)
1316                 {
1317                         Path & p = m_objects.paths[i];
1318                         p.m_bounds.w /= scale_amount;
1319                         p.m_bounds.h /= scale_amount;
1320                         p.m_bounds.x -= x;
1321                         p.m_bounds.x /= scale_amount;
1322                         p.m_bounds.x += x;
1323                         p.m_bounds.y -= y;
1324                         p.m_bounds.y /= scale_amount;
1325                         p.m_bounds.y += y;
1326                 }
1327                 return;
1328         #endif
1329
1330         for (unsigned i = 0; i < m_count; ++i)
1331         {
1332                 if (type != NUMBER_OF_OBJECT_TYPES && m_objects.types[i] != type)
1333                         continue;
1334
1335                 m_objects.bounds[i].w /= scale_amount;
1336                 m_objects.bounds[i].h /= scale_amount;
1337                 //m_objects.bounds[i].x = x + (m_objects.bounds[i].x-x)/scale_amount;
1338                 //m_objects.bounds[i].y = y + (m_objects.bounds[i].y-x)/scale_amount;
1339                 m_objects.bounds[i].x -= x;
1340                 m_objects.bounds[i].x /= scale_amount;
1341                 m_objects.bounds[i].x += x;
1342
1343                 m_objects.bounds[i].y -= y;
1344                 m_objects.bounds[i].y /= scale_amount;
1345                 m_objects.bounds[i].y += y;
1346         }
1347
1348 }
1349
1350