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, true});
 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, true});
 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, true});
 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                         Rect new_bounds = TransformFromQuadChild(m_objects.bounds[i], type);
 284                         // If the object is too small to be seen, discard it.
 285                         if (!new_bounds.w || !new_bounds.h) continue;
 286                         m_objects.bounds.push_back(new_bounds);
 287                         m_objects.types.push_back(m_objects.types[i]);
 288                         m_objects.data_indices.push_back(m_objects.data_indices[i]);
 289                         m_count++;
 290                 }
 291         }
 292         m_quadtree.nodes[new_index].object_end = m_objects.bounds.size();
 293         QuadTreeIndex orig_node = m_quadtree.nodes[orig_child].parent;
 294         if (orig_node == -1)
 295                 Fatal("Tried to overlay a QuadTree child that didn't exist!");
 296
 297         // Add us to the node's overlay linked list.
 298         QuadTreeIndex prev_overlay = orig_node;
 299         while (m_quadtree.nodes[prev_overlay].next_overlay != -1) prev_overlay = m_quadtree.nodes[prev_overlay].next_overlay;
 300         m_quadtree.nodes[prev_overlay].next_overlay = new_index;
 301         Debug("OverlayQuadParent(%d, %d, %d) = %d", orig_child, child, type, new_index);
 302
 303         // Recurse into any extant parent.
 304         if (m_quadtree.nodes[orig_node].parent != -1)
 305                 OverlayQuadParent(orig_node, new_index, m_quadtree.nodes[orig_node].child_type);
 306
 307         m_quadtree.nodes[new_index].object_dirty = m_quadtree.nodes[new_index].object_end;
 308         m_quadtree.nodes[new_index].next_overlay = -1;
 309         m_document_dirty = true;
 310 }
 311
 312 void Document::PropagateQuadChanges(QuadTreeIndex node)
 313 {
 314         for(QuadTreeIndex overlay = node; overlay != -1; overlay = m_quadtree.nodes[overlay].next_overlay)
 315         {
 316                 // We don't care about clean overlays.
 317                 if (m_quadtree.nodes[overlay].object_dirty == m_quadtree.nodes[overlay].object_end) continue;
 318                 // Recurse into our parent, should we have any.
 319                 if (m_quadtree.nodes[node].parent != -1)
 320                         OverlayQuadParent(node, overlay, m_quadtree.nodes[node].child_type);
 321                 // Recurse into any extant children.
 322                 if (m_quadtree.nodes[node].top_left != -1)
 323                         OverlayQuadChildren(node, overlay, QTC_TOP_LEFT);
 324                 if (m_quadtree.nodes[node].top_right != -1)
 325                         OverlayQuadChildren(node, overlay, QTC_TOP_RIGHT);
 326                 if (m_quadtree.nodes[node].bottom_left != -1)
 327                         OverlayQuadChildren(node, overlay, QTC_BOTTOM_LEFT);
 328                 if (m_quadtree.nodes[node].bottom_right != -1)
 329                         OverlayQuadChildren(node, overlay, QTC_BOTTOM_RIGHT);
 330
 331                 m_quadtree.nodes[overlay].object_dirty = m_quadtree.nodes[overlay].object_end;
 332         }
 333 }
 334
 335 // Reparent a quadtree node, making it the "type" child of a new node.
 336 QuadTreeIndex Document::GenQuadParent(QuadTreeIndex child, QuadTreeNodeChildren type)
 337 {
 338         QuadTreeIndex new_index = m_quadtree.nodes.size();
 339         m_quadtree.nodes.push_back(QuadTreeNode{QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, -1, QTC_UNKNOWN, 0, 0, -1, true});
 340
 341         m_quadtree.nodes[new_index].object_begin = m_objects.bounds.size();
 342         for (QuadTreeIndex overlay = child; overlay != -1; overlay = m_quadtree.nodes[overlay].next_overlay)
 343         {
 344                 for (unsigned i = m_quadtree.nodes[overlay].object_begin; i < m_quadtree.nodes[overlay].object_end; ++i)
 345                 {
 346                         Rect new_bounds = TransformFromQuadChild(m_objects.bounds[i], type);
 347                         // If the object is too small to be seen, discard it.
 348                         if (!new_bounds.w || !new_bounds.h) continue;
 349                         m_objects.bounds.push_back(new_bounds);
 350                         m_objects.types.push_back(m_objects.types[i]);
 351                         m_objects.data_indices.push_back(m_objects.data_indices[i]);
 352                         m_count++;
 353                 }
 354         }
 355         m_quadtree.nodes[new_index].object_end = m_objects.bounds.size();
 356         m_quadtree.nodes[new_index].object_dirty = m_objects.bounds.size();
 357         switch (type)
 358         {
 359                 case QTC_TOP_LEFT:
 360                         m_quadtree.nodes[new_index].top_left = child;
 361                         break;
 362                 case QTC_TOP_RIGHT:
 363                         m_quadtree.nodes[new_index].top_right = child;
 364                         break;
 365                 case QTC_BOTTOM_LEFT:
 366                         m_quadtree.nodes[new_index].bottom_left = child;
 367                         break;
 368                 case QTC_BOTTOM_RIGHT:
 369                         m_quadtree.nodes[new_index].bottom_right = child;
 370                         break;
 371                 default:
 372                         Fatal("Tried to add a QuadTree child of invalid type!");
 373         }
 374         return new_index;
 375         m_document_dirty = true;
 376 }
 377
 378 #endif
 379
 380 void Document::Load(const string & filename)
 381 {
 382         m_objects.bounds.clear();
 383         m_count = 0;
 384         if (filename == "")
 385         {
 386                 Debug("Loaded empty document.");
 387                 return;
 388         }
 389         Debug("Loading document from file \"%s\"", filename.c_str());
 390         FILE * file = fopen(filename.c_str(), "r");
 391         if (file == NULL)
 392                 Fatal("Couldn't open file \"%s\"", filename.c_str(), strerror(errno));
 393
 394         size_t read;
 395
 396         DocChunkTypes chunk_type;
 397         uint32_t chunk_size;
 398         while (ReadChunkHeader(file, chunk_type, chunk_size))
 399         {
 400                 switch(chunk_type)
 401                 {
 402                 case CT_NUMOBJS:
 403                         read = fread(&m_count, sizeof(m_count), 1, file);
 404                         if (read != 1)
 405                                 Fatal("Failed to read number of objects!");
 406                         Debug("Number of objects: %u", ObjectCount());
 407                         break;
 408                 case CT_OBJTYPES:
 409                         Debug("Object types...");
 410                         LoadStructVector<ObjectType>(file, chunk_size/sizeof(ObjectType), m_objects.types);
 411                         break;
 412                 case CT_OBJBOUNDS:
 413                         Debug("Object bounds...");
 414                         LoadStructVector<Rect>(file, chunk_size/sizeof(Rect), m_objects.bounds);
 415                         break;
 416                 case CT_OBJINDICES:
 417                         Debug("Object data indices...");
 418                         LoadStructVector<unsigned>(file, chunk_size/sizeof(unsigned), m_objects.data_indices);
 419                         break;
 420                 case CT_OBJBEZIERS:
 421                         Debug("Bezier data...");
 422                         LoadStructVector<Bezier>(file, chunk_size/sizeof(Bezier), m_objects.beziers);
 423                         break;
 424
 425                 case CT_OBJPATHS:
 426                         Debug("Path data...");
 427                         Warn("Not handled because lazy");
 428                         break;
 429                 }
 430         }
 431         Debug("Successfully loaded %u objects from \"%s\"", ObjectCount(), filename.c_str());
 432 #ifndef QUADTREE_DISABLED
 433         if (m_quadtree.root_id == QUADTREE_EMPTY)
 434         {
 435                 GenBaseQuadtree();
 436         }
 437 #endif
 438 }
 439
 440 unsigned Document::AddPath(unsigned start_index, unsigned end_index, const Colour & fill, const Colour & stroke)
 441 {
 442         Path path(m_objects, start_index, end_index, fill, stroke);
 443         unsigned data_index = AddPathData(path);
 444         Rect bounds = path.SolveBounds(m_objects);
 445         unsigned result = Add(PATH, bounds,data_index);
 446         m_objects.paths[data_index].m_index = result;
 447         //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);
 448         return result;
 449 }
 450
 451 /**
 452  * Add a Bezier using Absolute coords
 453  */
 454 unsigned Document::AddBezier(const Bezier & bezier)
 455 {
 456         Rect bounds = bezier.SolveBounds();
 457         Bezier data = bezier.ToRelative(bounds); // Relative
 458         if (data.ToAbsolute(bounds) != bezier)
 459         {
 460                 Warn("%s != %s", data.ToAbsolute(bounds).Str().c_str(),
 461                         bezier.Str().c_str());
 462                 Warn("ToAbsolute on ToRelative does not give original Bezier");
 463         }
 464         unsigned index = AddBezierData(data);
 465         return Add(BEZIER, bounds, index);
 466 }
 467 // Adds an object to the Document, clipping it to m_clip_rect.
 468 // Helper function called by Document::Add()
 469 int Document::AddClip(ObjectType type, const Rect& bounds, unsigned data_index, const Rect& clip_rect)
 470 {
 471         PROFILE_SCOPE("Document::AddAndClip");
 472         switch (type)
 473         {
 474         case RECT_FILLED:
 475         case RECT_OUTLINE:
 476         case PATH:
 477                 {
 478                 Rect obj_bounds = clip_rect.Clip(bounds);
 479                 m_objects.bounds.push_back(obj_bounds);
 480                 m_objects.types.push_back(type);
 481                 m_objects.data_indices.push_back(data_index);
 482                 return 1;
 483                 }
 484         case BEZIER:
 485                 {
 486                 // If we're entirely within the clipping rect, no clipping need occur.
 487                 if (clip_rect.Contains(bounds))
 488                 {
 489                         m_objects.bounds.push_back(bounds);
 490                         m_objects.types.push_back(type);
 491                         m_objects.data_indices.push_back(data_index);
 492                         return 1;
 493                 }
 494                 Rect clip_bezier_bounds = TransformRectCoordinates(bounds, clip_rect);
 495                 std::vector<Bezier> new_curves = m_objects.beziers[data_index].ClipToRectangle(clip_bezier_bounds);
 496                 for (size_t i = 0; i < new_curves.size(); ++i)
 497                 {
 498                         Bezier new_curve_data = new_curves[i].ToAbsolute(bounds);
 499                         Rect new_bounds = new_curve_data.SolveBounds();
 500                         new_curve_data = new_curve_data.ToRelative(new_bounds);
 501                         unsigned index = AddBezierData(new_curve_data);
 502                         m_objects.bounds.push_back(new_bounds);
 503                         m_objects.types.push_back(BEZIER);
 504                         m_objects.data_indices.push_back(index);
 505                 }
 506                 return new_curves.size();
 507                 }
 508         default:
 509                 m_objects.bounds.push_back(bounds);
 510                 m_objects.types.push_back(type);
 511                 m_objects.data_indices.push_back(data_index);
 512                 return 1;
 513         }
 514         return 0;
 515 }
 516
 517 unsigned Document::Add(ObjectType type, const Rect & bounds, unsigned data_index, QuadTreeIndex qti)
 518 {
 519         PROFILE_SCOPE("Document::Add");
 520         Rect new_bounds = bounds;
 521 #ifndef QUADTREE_DISABLED
 522         int num_added = 1;
 523         if (qti == -1) qti = m_current_insert_node;
 524         if (qti != -1)
 525         {
 526                 // Move the object to the quadtree node it should be in.
 527                 m_quadtree.GetCanonicalCoords(qti, new_bounds.x, new_bounds.y, this);
 528                 Rect cliprect = Rect(0,0,1,1);
 529                 num_added = AddClip(type, new_bounds, data_index, cliprect);
 530         }
 531         else
 532 #endif
 533         {
 534                 m_objects.types.push_back(type);
 535                 m_objects.bounds.push_back(new_bounds);
 536                 m_objects.data_indices.push_back(data_index);
 537         }
 538         m_document_dirty = true;
 539 #ifndef QUADTREE_DISABLED
 540         if (qti != -1)
 541         {
 542                 QuadTreeIndex new_qti = qti;
 543                 while (m_quadtree.nodes[new_qti].next_overlay != -1)
 544                 {
 545                         if (m_count == m_quadtree.nodes[new_qti].object_end+1)
 546                         {
 547                                 m_quadtree.nodes[new_qti].object_end += num_added;
 548                                 m_quadtree.nodes[new_qti].render_dirty = true;
 549                                 new_qti = -1;
 550                                 break;
 551                         }
 552                         new_qti = m_quadtree.nodes[new_qti].next_overlay;
 553                 }
 554                 if (new_qti != -1)
 555                 {
 556                         QuadTreeIndex overlay = m_quadtree.nodes.size();
 557                         Debug("Adding new overlay, nqti = %d, overlay = %d", new_qti, overlay);
 558                         m_quadtree.nodes.push_back(QuadTreeNode{QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, -1, QTC_UNKNOWN, 0, 0, -1});
 559                         m_quadtree.nodes[overlay].object_begin = m_count;
 560                         // All objects are dirty.
 561                         m_quadtree.nodes[overlay].object_dirty = m_count;
 562                         m_quadtree.nodes[overlay].object_end = m_count+num_added;
 563                         m_quadtree.nodes[overlay].next_overlay = -1;
 564                         m_quadtree.nodes[overlay].render_dirty = true;
 565                         m_quadtree.nodes[new_qti].next_overlay = overlay;
 566                         new_qti = overlay;
 567                 }
 568         }
 569         m_count += num_added;
 570         return m_count-num_added;
 571 #else // words fail me (still not amused)
 572         return (m_count++);
 573 #endif
 574
 575 }
 576
 577 unsigned Document::AddBezierData(const Bezier & bezier)
 578 {
 579         m_objects.beziers.push_back(bezier);
 580         return m_objects.beziers.size()-1;
 581 }
 582
 583 unsigned Document::AddPathData(const Path & path)
 584 {
 585         m_objects.paths.push_back(path);
 586         return m_objects.paths.size()-1;
 587 }
 588
 589 void Document::DebugDumpObjects()
 590 {
 591         Debug("Objects for Document %p are:", this);
 592         for (unsigned id = 0; id < ObjectCount(); ++id)
 593         {
 594                 Debug("%u. \tType: %u\tBounds: %s", id, m_objects.types[id], m_objects.bounds[id].Str().c_str());
 595         }
 596 }
 597
 598 bool Document::operator==(const Document & equ) const
 599 {
 600         return (ObjectCount() == equ.ObjectCount()
 601                 && memcmp(m_objects.bounds.data(), equ.m_objects.bounds.data(), ObjectCount() * sizeof(Rect)) == 0
 602                 && memcmp(m_objects.data_indices.data(), equ.m_objects.data_indices.data(), ObjectCount() * sizeof(unsigned)) == 0
 603                 && memcmp(m_objects.beziers.data(), equ.m_objects.beziers.data(), m_objects.beziers.size() * sizeof(Bezier)) == 0);
 604 }
 605
 606
 607
 608 // Behold my amazing tokenizing abilities
 609 static string & GetToken(const string & d, string & token, unsigned & i, const string & delims = "()[],{}<>;:=")
 610 {
 611         token.clear();
 612         while (i < d.size() && iswspace(d[i]))
 613         {
 614                 ++i;
 615         }
 616
 617         while (i < d.size())
 618         {
 619                 if (iswspace(d[i]) || strchr(delims.c_str(),d[i]) != NULL)
 620                 {
 621                         if (token.size() == 0 && !iswspace(d[i]))
 622                         {
 623                                 token += d[i++];
 624                         }
 625                         break;
 626                 }
 627                 token += d[i++];
 628         }
 629         //Debug("Got token \"%s\"", token.c_str());
 630         return token;
 631 }
 632
 633 static void GetXYPair(const string & d, Real & x, Real & y, unsigned & i,const string & delims = "()[],{}<>;:=")
 634 {
 635         string token("");
 636         while (GetToken(d, token, i, delims) == ",");
 637         x = RealFromStr(token);
 638         if (GetToken(d, token, i, delims) != ",")
 639         {
 640                 Fatal("Expected \",\" seperating x,y pair");
 641         }
 642         y = RealFromStr(GetToken(d,token,i,delims));
 643 }
 644
 645 static bool GetKeyValuePair(const string & d, string & key, string & value, unsigned & i, const string & delims = "()[],{}<>;:=")
 646 {
 647         key = "";
 648         string token;
 649         while (GetToken(d, token, i, delims) == ":" || token == ";");
 650         key = token;
 651         if (GetToken(d, token, i, delims) != ":")
 652         {
 653                 Error("Expected \":\" seperating key:value pair");
 654                 return false;
 655         }
 656         value = "";
 657         GetToken(d, value, i, delims);
 658         return true;
 659 }
 660
 661 static void TransformXYPair(Real & x, Real & y, const SVGMatrix & transform)
 662 {
 663         Real x0(x);
 664         x = transform.a * x + transform.c * y + transform.e;
 665         y = transform.b * x0 + transform.d * y + transform.f;
 666 }
 667
 668 void Document::ParseSVGTransform(const string & s, SVGMatrix & transform)
 669 {
 670         //Debug("Parsing transform %s", s.c_str());
 671         string token;
 672         string command;
 673         unsigned i = 0;
 674
 675         while (i < s.size())
 676         {
 677                 GetToken(s, command, i);
 678                 if (command == "," || command == "" || command == ":")
 679                 {
 680                         if (i < s.size())
 681                                 GetToken(s, command, i);
 682                         else
 683                                 return;
 684                 }
 685                 //Debug("Token is \"%s\"", command.c_str());
 686
 687                 SVGMatrix delta = {1,0,0,0,1,0};
 688
 689
 690                 assert(GetToken(s,token, i) == "(");
 691                 if (command == "translate")
 692                 {
 693                         GetXYPair(s, delta.e, delta.f, i);
 694                         assert(GetToken(s,token, i) == ")");
 695                 }
 696                 else if (command == "matrix")
 697                 {
 698                         GetXYPair(s, delta.a, delta.b,i);
 699                         GetXYPair(s, delta.c, delta.d,i);
 700                         GetXYPair(s, delta.e, delta.f,i);
 701                         assert(GetToken(s,token, i) == ")");
 702                 }
 703                 else if (command == "scale")
 704                 {
 705                         delta.a = RealFromStr(GetToken(s,token,i));
 706                         GetToken(s, token, i);
 707                         if (token == ",")
 708                         {
 709                                 delta.d = RealFromStr(GetToken(s,token,i));
 710                                 assert(GetToken(s, token, i) == ")");
 711                         }
 712                         else
 713                         {
 714                                 delta.d = delta.a;
 715                                 assert(token == ")");
 716                         }
 717
 718                 }
 719                 else
 720                 {
 721                         Warn("Unrecognised transform \"%s\", using identity", command.c_str());
 722                 }
 723
 724                 //Debug("Old transform is {%f,%f,%f,%f,%f,%f}", transform.a, transform.b, transform.c, transform.d,transform.e,transform.f);
 725                 //Debug("Delta transform is {%f,%f,%f,%f,%f,%f}", delta.a, delta.b, delta.c, delta.d,delta.e,delta.f);
 726
 727                 SVGMatrix old(transform);
 728                 transform.a = old.a * delta.a + old.c * delta.b;
 729                 transform.c = old.a * delta.c + old.c * delta.d;
 730                 transform.e = old.a * delta.e + old.c * delta.f + old.e;
 731
 732                 transform.b = old.b * delta.a + old.d * delta.b;
 733                 transform.d = old.b * delta.c + old.d * delta.d;
 734                 transform.f = old.b * delta.e + old.d * delta.f + old.f;
 735
 736                 //Debug("New transform is {%f,%f,%f,%f,%f,%f}", transform.a, transform.b, transform.c, transform.d,transform.e,transform.f);
 737         }
 738 }
 739
 740 inline Colour ParseColourString(const string & colour_str)
 741 {
 742         Colour c(0,0,0,0);
 743         if (colour_str == "red")
 744                 c = {255,0,0,255};
 745         else if (colour_str == "blue")
 746                 c = {0,0,255,255};
 747         else if (colour_str == "green")
 748                 c = {0,255,0,255};
 749         else if (colour_str == "black")
 750                 c = {0,0,0,255};
 751         else if (colour_str == "white")
 752                 c = {255,255,255,255};
 753         else if (colour_str.size() == 7 && colour_str[0] == '#')
 754         {
 755                 //Debug("Parse colour string: \"%s\"", colour_str.c_str());
 756                 char comp[3] = {colour_str[1], colour_str[2], '\0'};
 757                 c.r = strtoul(comp, NULL, 16);
 758                 comp[0] = colour_str[3]; comp[1] = colour_str[4];
 759                 c.g = strtoul(comp, NULL, 16);
 760                 comp[0] = colour_str[5]; comp[1] = colour_str[6];
 761                 c.b = strtoul(comp, NULL, 16);
 762                 c.a = 255;
 763                 //Debug("Colour is: %u, %u, %u, %u", c.r, c.g, c.b, c.a);
 764         }
 765         return c;
 766 }
 767
 768 void Document::ParseSVGNode(pugi::xml_node & root, SVGMatrix & parent_transform)
 769 {
 770         //Debug("Parse node <%s>", root.name());
 771
 772
 773         // Centre the SVGs
 774         if (strcmp(root.name(),"svg") == 0)
 775         {
 776                 Real ww = RealFromStr(root.attribute("width").as_string());
 777                 Real hh = RealFromStr(root.attribute("height").as_string());
 778                 parent_transform.e -= parent_transform.a * ww/Real(2);
 779                 parent_transform.f -= parent_transform.d * hh/Real(2);
 780         }
 781
 782         for (pugi::xml_node child = root.first_child(); child; child = child.next_sibling())
 783         {
 784                 SVGMatrix transform(parent_transform);
 785                 pugi::xml_attribute attrib_trans = child.attribute("transform");
 786                 if (!attrib_trans.empty())
 787                 {
 788                         ParseSVGTransform(attrib_trans.as_string(), transform);
 789                 }
 790
 791
 792
 793                 if (strcmp(child.name(), "svg") == 0 || strcmp(child.name(),"g") == 0
 794                         || strcmp(child.name(), "group") == 0)
 795                 {
 796
 797                         ParseSVGNode(child, transform);
 798                         continue;
 799                 }
 800                 else if (strcmp(child.name(), "path") == 0)
 801                 {
 802                         string d = child.attribute("d").as_string();
 803                         //Debug("Path data attribute is \"%s\"", d.c_str());
 804                         bool closed = false;
 805                         pair<unsigned, unsigned> range = ParseSVGPathData(d, transform, closed);
 806                         if (true && range.first < m_count && range.second < m_count)//(closed)
 807                         {
 808
 809                                 string colour_str("");
 810                                 map<string, string> style;
 811                                 if (child.attribute("style"))
 812                                 {
 813                                         ParseSVGStyleData(child.attribute("style").as_string(), style);
 814                                 }
 815
 816                                 // Determine shading colour
 817                                 if (child.attribute("fill"))
 818                                 {
 819                                         colour_str = child.attribute("fill").as_string();
 820                                 }
 821                                 else if (style.find("fill") != style.end())
 822                                 {
 823                                         colour_str = style["fill"];
 824                                 }
 825                                 Colour fill = ParseColourString(colour_str);
 826                                 Colour stroke = fill;
 827
 828                                 if (child.attribute("stroke"))
 829                                 {
 830                                         colour_str = child.attribute("stroke").as_string();
 831                                         stroke = ParseColourString(colour_str);
 832                                 }
 833                                 else if (style.find("stroke") != style.end())
 834                                 {
 835                                         colour_str = style["stroke"];
 836                                         stroke = ParseColourString(colour_str);
 837                                 }
 838
 839
 840                                 // Determin shading alpha
 841                                 if (child.attribute("fill-opacity"))
 842                                 {
 843                                         fill.a = 255*child.attribute("fill-opacity").as_float();
 844                                 }
 845                                 else if (style.find("fill-opacity") != style.end())
 846                                 {
 847                                         fill.a = 255*strtod(style["fill-opacity"].c_str(), NULL);
 848                                 }
 849                                 if (child.attribute("stroke-opacity"))
 850                                 {
 851                                         stroke.a = 255*child.attribute("stroke-opacity").as_float();
 852                                 }
 853                                 else if (style.find("stroke-opacity") != style.end())
 854                                 {
 855                                         stroke.a = 255*strtod(style["stroke-opacity"].c_str(), NULL);
 856                                 }
 857                                 AddPath(range.first, range.second, fill, stroke);
 858                         }
 859
 860                 }
 861                 else if (strcmp(child.name(), "line") == 0)
 862                 {
 863                         Real x0(child.attribute("x1").as_float());
 864                         Real y0(child.attribute("y1").as_float());
 865                         Real x1(child.attribute("x2").as_float());
 866                         Real y1(child.attribute("y2").as_float());
 867                         TransformXYPair(x0,y0,transform);
 868                         TransformXYPair(x1,y1,transform);
 869                         AddBezier(Bezier(x0,y0,x1,y1,x1,y1,x1,y1));
 870                 }
 871                 else if (strcmp(child.name(), "rect") == 0)
 872                 {
 873                         Real coords[4];
 874                         const char * attrib_names[] = {"x", "y", "width", "height"};
 875                         for (size_t i = 0; i < 4; ++i)
 876                                 coords[i] = child.attribute(attrib_names[i]).as_float();
 877
 878                         Real x2(coords[0]+coords[2]);
 879                         Real y2(coords[1]+coords[3]);
 880                         TransformXYPair(coords[0],coords[1],transform); // x, y, transform
 881                         TransformXYPair(x2,y2,transform);
 882                         coords[2] = x2 - coords[0];
 883                         coords[3] = y2 - coords[1];
 884
 885                         bool outline = !(child.attribute("fill") && strcmp(child.attribute("fill").as_string(),"none") != 0);
 886                         Add(outline?RECT_OUTLINE:RECT_FILLED, Rect(coords[0], coords[1], coords[2], coords[3]),0);
 887                 }
 888                 else if (strcmp(child.name(), "circle") == 0)
 889                 {
 890                         Real cx = child.attribute("cx").as_float();
 891                         Real cy = child.attribute("cy").as_float();
 892                         Real r = child.attribute("r").as_float();
 893
 894                         Real x = (cx - r);
 895                         Real y = (cy - r);
 896                         TransformXYPair(x,y,transform);
 897                         Real w = Real(2)*r*transform.a; // width scales
 898                         Real h = Real(2)*r*transform.d; // height scales
 899
 900
 901                         Rect rect(x,y,w,h);
 902                         Add(CIRCLE_FILLED, rect,0);
 903                         Debug("Added Circle %s", rect.Str().c_str());
 904                 }
 905                 else if (strcmp(child.name(), "text") == 0)
 906                 {
 907                         Real x = child.attribute("x").as_float();
 908                         Real y = child.attribute("y").as_float();
 909                         TransformXYPair(x,y,transform);
 910                         Debug("Add text \"%s\"", child.child_value());
 911                         AddText(child.child_value(), 0.05, x, y);
 912                 }
 913         }
 914 }
 915
 916 void Document::ParseSVGStyleData(const string & style, map<string, string> & results)
 917 {
 918         unsigned i = 0;
 919         string key;
 920         string value;
 921         while (i < style.size() && GetKeyValuePair(style, key, value, i))
 922         {
 923                 results[key] = value;
 924         }
 925 }
 926
 927 /**
 928  * Parse an SVG string into a rectangle
 929  */
 930 void Document::ParseSVG(const string & input, const Rect & bounds)
 931 {
 932         using namespace pugi;
 933
 934         xml_document doc_xml;
 935         xml_parse_result result = doc_xml.load(input.c_str());
 936
 937         if (!result)
 938                 Error("Couldn't parse SVG input - %s", result.description());
 939
 940         Debug("Loaded XML - %s", result.description());
 941         SVGMatrix transform = {bounds.w, 0,bounds.x, 0,bounds.h,bounds.y};
 942         ParseSVGNode(doc_xml, transform);
 943 }
 944
 945 /**
 946  * Load an SVG into a rectangle
 947  */
 948 void Document::LoadSVG(const string & filename, const Rect & bounds)
 949 {
 950         using namespace pugi;
 951
 952         xml_document doc_xml;
 953         ifstream input(filename.c_str(), ios_base::in);
 954         xml_parse_result result = doc_xml.load(input);
 955
 956         if (!result)
 957                 Error("Couldn't load \"%s\" - %s", filename.c_str(), result.description());
 958
 959         Debug("Loaded XML from \"%s\" - %s", filename.c_str(), result.description());
 960
 961         input.close();
 962                                                 // a c e, b d f
 963         SVGMatrix transform = {bounds.w,0 ,bounds.x, 0,bounds.h,bounds.y};
 964         ParseSVGNode(doc_xml, transform);
 965 }
 966
 967
 968
 969 // Fear the wrath of the tokenizing svg data
 970 // Seriously this isn't really very DOM-like at all is it?
 971 pair<unsigned, unsigned> Document::ParseSVGPathData(const string & d, const SVGMatrix & transform, bool & closed)
 972 {
 973         closed = false;
 974         Real x[4] = {0,0,0,0};
 975         Real y[4] = {0,0,0,0};
 976
 977         string token("");
 978         string command("m");
 979
 980         Real x0(0);
 981         Real y0(0);
 982
 983         unsigned i = 0;
 984         unsigned prev_i = 0;
 985
 986         bool start = false;
 987
 988
 989         static string delims("()[],{}<>;:=LlHhVvmMqQzZcC");
 990
 991         pair<unsigned, unsigned> range(m_count, m_count);
 992
 993         while (i < d.size() && GetToken(d, token, i, delims).size() > 0)
 994         {
 995                 if (isalpha(token[0]))
 996                         command = token;
 997                 else
 998                 {
 999                         i = prev_i; // hax
1000                         if(command == "")
1001                                 command = "L";
1002                 }
1003
1004                 bool relative = islower(command[0]);
1005
1006                 if (command == "m" || command == "M")
1007                 {
1008                         //Debug("Construct moveto command");
1009                         Real dx = RealFromStr(GetToken(d,token,i,delims));
1010                         assert(GetToken(d,token,i,delims) == ",");
1011                         Real dy = RealFromStr(GetToken(d,token,i,delims));
1012
1013                         x[0] = (relative) ? x[0] + dx : dx;
1014                         y[0] = (relative) ? y[0] + dy : dy;
1015
1016                         x0 = x[0];
1017                         y0 = y[0];
1018                         //Debug("mmoveto %f,%f", Float(x[0]),Float(y[0]));
1019                         command = (command == "m") ? "l" : "L";
1020                 }
1021                 else if (command == "c" || command == "C" || command == "q" || command == "Q")
1022                 {
1023                         //Debug("Construct curveto command");
1024                         Real dx = RealFromStr(GetToken(d,token,i,delims));
1025                         assert(GetToken(d,token,i,delims) == ",");
1026                         Real dy = RealFromStr(GetToken(d,token,i,delims));
1027
1028                         x[1] = (relative) ? x[0] + dx : dx;
1029                         y[1] = (relative) ? y[0] + dy : dy;
1030
1031                         dx = RealFromStr(GetToken(d,token,i,delims));
1032                         assert(GetToken(d,token,i,delims) == ",");
1033                         dy = RealFromStr(GetToken(d,token,i,delims));
1034
1035                         x[2] = (relative) ? x[0] + dx : dx;
1036                         y[2] = (relative) ? y[0] + dy : dy;
1037
1038                         if (command != "q" && command != "Q")
1039                         {
1040                                 dx = RealFromStr(GetToken(d,token,i,delims));
1041                                 assert(GetToken(d,token,i,delims) == ",");
1042                                 dy = RealFromStr(GetToken(d,token,i,delims));
1043                                 x[3] = (relative) ? x[0] + dx : dx;
1044                                 y[3] = (relative) ? y[0] + dy : dy;
1045                         }
1046                         else
1047                         {
1048                                 x[3] = x[2];
1049                                 y[3] = y[2];
1050                                 Real old_x1(x[1]), old_y1(y[1]);
1051                                 x[1] = x[0] + Real(2) * (old_x1 - x[0])/ Real(3);
1052                                 y[1] = y[0] + Real(2) * (old_y1 - y[0])/ Real(3);
1053                                 x[2] = x[3] + Real(2) * (old_x1 - x[3])/ Real(3);
1054                                 y[2] = y[3] + Real(2) * (old_y1 - y[3])/ Real(3);
1055                         }
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
1064                         //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]));
1065
1066                         x[0] = x3;
1067                         y[0] = y3;
1068
1069
1070                 }
1071                 else if (command == "l" || command == "L" || command == "h" || command == "H" || command == "v" || command == "V")
1072                 {
1073                         //Debug("Construct lineto command, relative %d", relative);
1074
1075                         Real dx = RealFromStr(GetToken(d,token,i,delims));
1076                         Real dy = 0;
1077                         if (command == "l" || command == "L")
1078                         {
1079                                 assert(GetToken(d,token,i,delims) == ",");
1080                                 dy = RealFromStr(GetToken(d,token,i,delims));
1081                         }
1082                         else if (command == "v" || command == "V")
1083                         {
1084                                 swap(dx,dy);
1085                         }
1086
1087                         x[1] = (relative) ? x[0] + dx : dx;
1088                         y[1] = (relative) ? y[0] + dy : dy;
1089                         if (command == "v" || command == "V")
1090                         {
1091                                 x[1] = x[0];
1092                         }
1093                         else if (command == "h" || command == "H")
1094                         {
1095                                 y[1] = y[0];
1096                         }
1097
1098                         Real x1(x[1]);
1099                         Real y1(y[1]);
1100
1101                         TransformXYPair(x[0],y[0],transform);
1102                         TransformXYPair(x[1],y[1],transform);
1103
1104
1105                         range.second = AddBezier(Bezier(x[0],y[0],x[1],y[1],x[1],y[1],x[1],y[1]));
1106
1107                         //Debug("[%u] lineto %f,%f %f,%f", index, Float(x[0]),Float(y[0]),Float(x[1]),Float(y[1]));
1108
1109                         x[0] = x1;
1110                         y[0] = y1;
1111
1112                 }
1113                 else if (command == "z" || command == "Z")
1114                 {
1115                         //Debug("Construct returnto command");
1116                         x[1] = x0;
1117                         y[1] = y0;
1118                         x[2] = x0;
1119                         y[2] = y0;
1120                         x[3] = x0;
1121                         y[3] = y0;
1122
1123                         Real x3(x[3]);
1124                         Real y3(y[3]);
1125                         for (int j = 0; j < 4; ++j)
1126                                 TransformXYPair(x[j],y[j], transform);
1127
1128                         range.second = AddBezier(Bezier(x[0],y[0],x[1],y[1],x[2],y[2],x[3],y[3]));
1129                         //Debug("[%u] returnto %f,%f %f,%f", index, Float(x[0]),Float(y[0]),Float(x[1]),Float(y[1]));
1130
1131                         x[0] = x3;
1132                         y[0] = y3;
1133                         command = "m";
1134                         closed = true;
1135                 }
1136                 else
1137                 {
1138                         Warn("Unrecognised command \"%s\", set to \"m\"", command.c_str());
1139                         command = "m";
1140                 }
1141
1142                 if (!start)
1143                 {
1144                         x0 = x[0];
1145                         y0 = y[0];
1146                         start = true;
1147                 }
1148                 prev_i = i;
1149         }
1150         return range;
1151 }
1152
1153 void Document::SetFont(const string & font_filename)
1154 {
1155         if (m_font_data != NULL)
1156         {
1157                 free(m_font_data);
1158         }
1159
1160         FILE *font_file = fopen(font_filename.c_str(), "rb");
1161         fseek(font_file, 0, SEEK_END);
1162         size_t font_file_size = ftell(font_file);
1163         fseek(font_file, 0, SEEK_SET);
1164         m_font_data = (unsigned char*)malloc(font_file_size);
1165         size_t read = fread(m_font_data, 1, font_file_size, font_file);
1166         if (read != font_file_size)
1167         {
1168                 Fatal("Failed to read font data from \"%s\" - Read %u bytes expected %u - %s", font_filename.c_str(), read, font_file_size, strerror(errno));
1169         }
1170         fclose(font_file);
1171         stbtt_InitFont(&m_font, m_font_data, 0);
1172 }
1173
1174 void Document::AddText(const string & text, Real scale, Real x, Real y)
1175 {
1176         if (m_font_data == NULL)
1177         {
1178                 Warn("No font loaded");
1179                 return;
1180         }
1181
1182         Real x0(x);
1183         //Real y0(y);
1184         int ascent = 0, descent = 0, line_gap = 0;
1185         stbtt_GetFontVMetrics(&m_font, &ascent, &descent, &line_gap);
1186         Real font_scale = scale;
1187         font_scale /= Real(ascent - descent);
1188         Real y_advance = Real(font_scale) * Real(ascent - descent + line_gap);
1189         for (unsigned i = 0; i < text.size(); ++i)
1190         {
1191                 if (text[i] == '\n')
1192                 {
1193                         y += y_advance;
1194                         x = x0;
1195                 }
1196                 if (!isprint(text[i]))
1197                         continue;
1198
1199                 int advance_width = 0, left_side_bearing = 0, kerning = 0;
1200                 stbtt_GetCodepointHMetrics(&m_font, text[i], &advance_width, &left_side_bearing);
1201                 if (i >= 1)
1202                 {
1203                         kerning = stbtt_GetCodepointKernAdvance(&m_font, text[i-1], text[i]);
1204                 }
1205                 x += font_scale * Real(kerning);
1206                 AddFontGlyphAtPoint(&m_font, text[i], font_scale, x, y);
1207                 x += font_scale * Real(advance_width);
1208         }
1209 }
1210
1211 void Document::AddFontGlyphAtPoint(stbtt_fontinfo *font, int character, Real scale, Real x, Real y)
1212 {
1213         int glyph_index = stbtt_FindGlyphIndex(font, character);
1214
1215         // Check if there is actully a glyph to render.
1216         if (stbtt_IsGlyphEmpty(font, glyph_index))
1217         {
1218                 return;
1219         }
1220
1221         stbtt_vertex *instructions;
1222         int num_instructions = stbtt_GetGlyphShape(font, glyph_index, &instructions);
1223
1224         Real current_x(0), current_y(0);
1225         unsigned start_index = m_count;
1226         unsigned end_index = m_count;
1227         for (int i = 0; i < num_instructions; ++i)
1228         {
1229                 // TTF uses 16-bit signed ints for coordinates:
1230                 // with the y-axis inverted compared to us.
1231                 // Convert and scale any data.
1232                 Real inst_x = Real(instructions[i].x)*scale;
1233                 Real inst_y = Real(instructions[i].y)*-scale;
1234                 Real inst_cx = Real(instructions[i].cx)*scale;
1235                 Real inst_cy = Real(instructions[i].cy)*-scale;
1236                 Real old_x(current_x), old_y(current_y);
1237                 current_x = inst_x;
1238                 current_y = inst_y;
1239
1240                 switch(instructions[i].type)
1241                 {
1242                 // Move To
1243                 case STBTT_vmove:
1244                         break;
1245                 // Line To
1246                 case STBTT_vline:
1247                         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));
1248                         break;
1249                 // Quadratic Bezier To:
1250                 case STBTT_vcurve:
1251                         // Quadratic -> Cubic:
1252                         // - Endpoints are the same.
1253                         // - cubic1 = quad0+(2/3)*(quad1-quad0)
1254                         // - cubic2 = quad2+(2/3)*(quad1-quad2)
1255                         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,
1256                                                 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));
1257                         break;
1258                 }
1259         }
1260
1261         if (start_index < m_count && end_index < m_count)
1262         {
1263                 AddPath(start_index, end_index);
1264         }
1265         //Debug("Added Glyph \"%c\" at %f %f, scale %f", (char)character, Float(x), Float(y), Float(scale));
1266
1267         stbtt_FreeShape(font, instructions);
1268 }
1269
1270 void Document::TransformObjectBounds(const SVGMatrix & transform, ObjectType type)
1271 {
1272         #ifdef TRANSFORM_BEZIERS_TO_PATH
1273                 for (unsigned i = 0; i < m_objects.paths.size(); ++i)
1274                 {
1275                         Path & p = m_objects.paths[i];
1276                         p.m_bounds.x = transform.a * p.m_bounds.x + transform.e;
1277                         p.m_bounds.y = transform.d * p.m_bounds.y + transform.f;
1278                         p.m_bounds.w *= transform.a;
1279                         p.m_bounds.h *= transform.d;
1280                 }
1281                 return;
1282         #endif
1283
1284         for (unsigned i = 0; i < m_count; ++i)
1285         {
1286                 if (type == NUMBER_OF_OBJECT_TYPES || m_objects.types[i] == type)
1287                 {
1288                         TransformXYPair(m_objects.bounds[i].x, m_objects.bounds[i].y, transform);
1289                         m_objects.bounds[i].w *= transform.a;
1290                         m_objects.bounds[i].h *= transform.d;
1291                 }
1292         }
1293 }
1294
1295 void Document::TranslateObjects(const Real & dx, const Real & dy, ObjectType type)
1296 {
1297         #ifdef TRANSFORM_BEZIERS_TO_PATH
1298         for (unsigned i = 0; i < m_objects.paths.size(); ++i)
1299         {
1300                 Path & p = m_objects.paths[i];
1301                 p.m_bounds.x += dx;
1302                 p.m_bounds.y += dy;
1303         }
1304         return;
1305         #endif
1306
1307         for (unsigned i = 0; i < m_count; ++i)
1308         {
1309                 if (type == NUMBER_OF_OBJECT_TYPES || m_objects.types[i] == type)
1310                 {
1311                         m_objects.bounds[i].x += dx;
1312                         m_objects.bounds[i].y += dy;
1313                 }
1314         }
1315 }
1316
1317 void Document::ScaleObjectsAboutPoint(const Real & x, const Real & y, const Real & scale_amount, ObjectType type)
1318 {
1319         #ifdef TRANSFORM_BEZIERS_TO_PATH
1320                 for (unsigned i = 0; i < m_objects.paths.size(); ++i)
1321                 {
1322                         Path & p = m_objects.paths[i];
1323                         p.m_bounds.w /= scale_amount;
1324                         p.m_bounds.h /= scale_amount;
1325                         p.m_bounds.x -= x;
1326                         p.m_bounds.x /= scale_amount;
1327                         p.m_bounds.x += x;
1328                         p.m_bounds.y -= y;
1329                         p.m_bounds.y /= scale_amount;
1330                         p.m_bounds.y += y;
1331                 }
1332                 return;
1333         #endif
1334
1335         for (unsigned i = 0; i < m_count; ++i)
1336         {
1337                 if (type != NUMBER_OF_OBJECT_TYPES && m_objects.types[i] != type)
1338                         continue;
1339
1340                 m_objects.bounds[i].w /= scale_amount;
1341                 m_objects.bounds[i].h /= scale_amount;
1342                 //m_objects.bounds[i].x = x + (m_objects.bounds[i].x-x)/scale_amount;
1343                 //m_objects.bounds[i].y = y + (m_objects.bounds[i].y-x)/scale_amount;
1344                 m_objects.bounds[i].x -= x;
1345                 m_objects.bounds[i].x /= scale_amount;
1346                 m_objects.bounds[i].x += x;
1347
1348                 m_objects.bounds[i].y -= y;
1349                 m_objects.bounds[i].y /= scale_amount;
1350                 m_objects.bounds[i].y += y;
1351         }
1352
1353 }
1354
1355