X-Git-Url: https://git.ucc.asn.au/?p=ipdf%2Fcode.git;a=blobdiff_plain;f=src%2Fdocument.cpp;h=7c490742086327484c26a5b4bbe0b9d39dc7ba04;hp=99e429e9ec862ed44d8a2526f31c66ebb08f1296;hb=7a83af96414ff156f56455ff7a5e7af01fc403b5;hpb=b006386ab52e8a2c47c20bc21591d01c314d4d8e

diff --git a/src/document.cpp b/src/document.cpp
index 99e429e..7c49074 100644
--- a/src/document.cpp
+++ b/src/document.cpp
@@ -1,18 +1,437 @@
 #include "document.h"
+#include "bezier.h"
+#include <cstdio>
+#include <fstream>
 
 using namespace IPDF;
 using namespace std;
 
+//TODO: Make this work for variable sized Reals
+
+// Loads an std::vector<T> of size num_elements from a file.
+template<typename T>
+static void LoadStructVector(FILE *src_file, size_t num_elems, std::vector<T>& dest)
+{
+	size_t structsread = 0;
+	dest.resize(num_elems);
+	structsread = fread(dest.data(), sizeof(T), num_elems, src_file);
+	if (structsread != num_elems)
+		Fatal("Only read %u structs (expected %u)!", structsread, num_elems);
+}
+
+// Saves an std::vector<T> to a file. Size must be saves separately.
+template<typename T>
+static void SaveStructVector(FILE *dst_file, std::vector<T>& src)
+{
+	size_t written = 0;
+	written = fwrite(src.data(), sizeof(T), src.size(), dst_file);
+	if (written != src.size())
+		Fatal("Only wrote %u structs (expected %u)!", written, src.size());
+}
+
+static void WriteChunkHeader(FILE *dst_file, DocChunkTypes type, uint32_t size)
+{
+	size_t written = 0;
+	written = fwrite(&type, sizeof(type), 1, dst_file);
+	if (written != 1)
+		Fatal("Could not write Chunk header! (ID)");
+	written = fwrite(&size, sizeof(size), 1, dst_file);
+	if (written != 1)
+		Fatal("Could not write Chunk header (size)!");
+}
+
+static bool ReadChunkHeader(FILE *src_file, DocChunkTypes& type, uint32_t& size)
+{
+	if (fread(&type, sizeof(DocChunkTypes), 1, src_file) != 1)
+		return false;
+	if (fread(&size, sizeof(uint32_t), 1, src_file) != 1)
+		return false;
+	return true;
+}
+
+void Document::Save(const string & filename)
+{
+	Debug("Saving document to file \"%s\"...", filename.c_str());
+	FILE * file = fopen(filename.c_str(), "w");
+	if (file == NULL)
+		Fatal("Couldn't open file \"%s\" - %s", filename.c_str(), strerror(errno));
+
+	size_t written;
+	Debug("Number of objects (%u)...", ObjectCount());
+	WriteChunkHeader(file, CT_NUMOBJS, sizeof(m_count));
+	written = fwrite(&m_count, sizeof(m_count), 1, file);
+	if (written != 1)
+		Fatal("Failed to write number of objects!");
+
+	Debug("Object types...");
+	WriteChunkHeader(file, CT_OBJTYPES, m_objects.types.size() * sizeof(ObjectType));
+	SaveStructVector<ObjectType>(file, m_objects.types);
+
+	Debug("Object bounds...");
+	WriteChunkHeader(file, CT_OBJBOUNDS, m_objects.bounds.size() * sizeof(Rect));
+	SaveStructVector<Rect>(file, m_objects.bounds);
+
+	Debug("Object data indices...");
+	WriteChunkHeader(file, CT_OBJINDICES, m_objects.data_indices.size() * sizeof(unsigned));
+	SaveStructVector<unsigned>(file, m_objects.data_indices);
+	
+	Debug("Bezier data...");
+	WriteChunkHeader(file, CT_OBJBEZIERS, m_objects.beziers.size() * sizeof(uint8_t));
+	SaveStructVector<Bezier>(file, m_objects.beziers);
+
+	int err = fclose(file);
+	if (err != 0)
+		Fatal("Failed to close file \"%s\" - %s", filename.c_str(), strerror(err));
+
+	Debug("Successfully saved %u objects to \"%s\"", ObjectCount(), filename.c_str());
+}
+
+#ifndef QUADTREE_DISABLED
+
+void Document::GenBaseQuadtree()
+{
+	m_quadtree.nodes.push_back(QuadTreeNode{QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, QTC_UNKNOWN, 0, ObjectCount()});
+	m_quadtree.root_id = 0;
+	GenQuadNode(0, QTC_TOP_LEFT);
+}
+
+QuadTreeIndex Document::GenQuadNode(QuadTreeIndex parent, QuadTreeNodeChildren type)
+{
+	QuadTreeIndex new_index = m_quadtree.nodes.size();
+	m_quadtree.nodes.push_back(QuadTreeNode{QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, QUADTREE_EMPTY, parent, type, 0, 0});
+
+	m_quadtree.nodes[new_index].object_begin = m_objects.bounds.size();
+	for (unsigned i = m_quadtree.nodes[parent].object_begin; i < m_quadtree.nodes[parent].object_end; ++i)
+	{
+		if (ContainedInQuadChild(m_objects.bounds[i], type))
+		{
+			m_objects.bounds.push_back(TransformToQuadChild(m_objects.bounds[i], type));
+			m_objects.types.push_back(m_objects.types[i]);
+			m_objects.data_indices.push_back(m_objects.data_indices[i]);
+			m_count++;
+		}
+	}
+	m_quadtree.nodes[new_index].object_end = m_objects.bounds.size();
+	switch (type)
+	{
+		case QTC_TOP_LEFT:
+			m_quadtree.nodes[parent].top_left = new_index;
+			break;
+		case QTC_TOP_RIGHT:
+			m_quadtree.nodes[parent].top_right = new_index;
+			break;
+		case QTC_BOTTOM_LEFT:
+			m_quadtree.nodes[parent].bottom_left = new_index;
+			break;
+		case QTC_BOTTOM_RIGHT:
+			m_quadtree.nodes[parent].bottom_right = new_index;
+			break;
+		default:
+			Fatal("Tried to add a QuadTree child of invalid type!");
+	}
+	return new_index;
+}
+
+#endif
+
 void Document::Load(const string & filename)
 {
 	m_objects.bounds.clear();
 	m_count = 0;
 	if (filename == "")
+	{
+		Debug("Loaded empty document.");
 		return;
+	}
+	Debug("Loading document from file \"%s\"", filename.c_str());
+	FILE * file = fopen(filename.c_str(), "r");
+	if (file == NULL)
+		Fatal("Couldn't open file \"%s\"", filename.c_str(), strerror(errno));
+
+	size_t read;
+
+	DocChunkTypes chunk_type;
+	uint32_t chunk_size;
+	while (ReadChunkHeader(file, chunk_type, chunk_size))
+	{
+		switch(chunk_type)
+		{
+		case CT_NUMOBJS:
+			read = fread(&m_count, sizeof(m_count), 1, file);
+			if (read != 1)
+				Fatal("Failed to read number of objects!");
+			Debug("Number of objects: %u", ObjectCount());
+			break;
+		case CT_OBJTYPES:
+			Debug("Object types...");
+			LoadStructVector<ObjectType>(file, chunk_size/sizeof(ObjectType), m_objects.types);
+			break;
+		case CT_OBJBOUNDS:
+			Debug("Object bounds...");
+			LoadStructVector<Rect>(file, chunk_size/sizeof(Rect), m_objects.bounds);
+			break;
+		case CT_OBJINDICES:
+			Debug("Object data indices...");
+			LoadStructVector<unsigned>(file, chunk_size/sizeof(unsigned), m_objects.data_indices);
+			break;
+		case CT_OBJBEZIERS:
+			Debug("Bezier data...");
+			LoadStructVector<Bezier>(file, chunk_size/sizeof(Bezier), m_objects.beziers);
+			break;
+		}
+	}
+	Debug("Successfully loaded %u objects from \"%s\"", ObjectCount(), filename.c_str());
+#ifndef QUADTREE_DISABLED
+	if (m_quadtree.root_id == QUADTREE_EMPTY)
+	{
+		GenBaseQuadtree();
+	}
+#endif
+}
+
+void Document::Add(ObjectType type, const Rect & bounds, unsigned data_index)
+{
+	m_objects.types.push_back(type);
+	m_objects.bounds.push_back(bounds);
+	m_objects.data_indices.push_back(data_index);
+	++m_count; // Why can't we just use the size of types or something?
+}
+
+unsigned Document::AddBezierData(const Bezier & bezier)
+{
+	m_objects.beziers.push_back(bezier);
+	return m_objects.beziers.size()-1;
+}
+
+
+void Document::DebugDumpObjects()
+{
+	Debug("Objects for Document %p are:", this);
+	for (unsigned id = 0; id < ObjectCount(); ++id)
+	{
+		Debug("%u. \tType: %u\tBounds: %s", id, m_objects.types[id], m_objects.bounds[id].Str().c_str());
+	}
+}
+
+bool Document::operator==(const Document & equ) const
+{
+	return (ObjectCount() == equ.ObjectCount() 
+		&& memcmp(m_objects.bounds.data(), equ.m_objects.bounds.data(), ObjectCount() * sizeof(Rect)) == 0
+		&& memcmp(m_objects.data_indices.data(), equ.m_objects.data_indices.data(), ObjectCount() * sizeof(unsigned)) == 0
+		&& memcmp(m_objects.beziers.data(), equ.m_objects.beziers.data(), m_objects.beziers.size() * sizeof(Bezier)) == 0);
 }
 
-void Document::Add(Real x, Real y, Real w, Real h)
+
+#include "../contrib/pugixml-1.4/src/pugixml.hpp"
+#include "../contrib/pugixml-1.4/src/pugixml.cpp"
+
+void Document::LoadSVG(const string & filename, const Rect & bounds)
+{
+	using namespace pugi;
+	
+	xml_document doc_xml;
+	ifstream input(filename.c_str(), ios_base::in);
+	xml_parse_result result = doc_xml.load(input);
+	
+	if (!result)
+		Fatal("Couldn't load \"%s\" - %s", filename.c_str(), result.description());
+		
+	Debug("Loaded XML - %s", result.description());
+	
+	input.close();
+
+	// Combine all SVG tags into one thing because lazy
+	for (xml_node svg : doc_xml.children("svg"))
+	{
+		Real width = svg.attribute("width").as_float() * bounds.w;
+		Real height = svg.attribute("width").as_float() * bounds.h;
+		
+		
+		// Rectangles
+		Real coords[4];
+		const char * attrib_names[] = {"x", "y", "width", "height"};
+		for (pugi::xml_node rect : svg.children("rect"))
+		{
+			for (size_t i = 0; i < 4; ++i)
+				coords[i] = rect.attribute(attrib_names[i]).as_float();
+			
+			bool outline = !(rect.attribute("fill"));
+			Add(outline?RECT_OUTLINE:RECT_FILLED, Rect(coords[0]/width + bounds.x, coords[1]/height + bounds.y, coords[2]/width, coords[3]/height),0);
+			Debug("Added rectangle");
+		}		
+		
+		// Circles
+		for (pugi::xml_node circle : svg.children("circle"))
+		{
+			Real cx = circle.attribute("cx").as_float();
+			Real cy = circle.attribute("cy").as_float();
+			Real r = circle.attribute("r").as_float();
+			
+			Real x = (cx - r)/width + bounds.x; 
+			Real y = (cy - r)/height + bounds.y; 
+			Real w = 2*r/width; 
+			Real h = 2*r/height;
+			
+			Rect rect(x,y,w,h);
+			Add(CIRCLE_FILLED, rect,0);
+			Debug("Added Circle %s", rect.Str().c_str());
+
+		}		
+		
+		// paths
+		for (pugi::xml_node path : svg.children("path"))
+		{
+			
+			string d = path.attribute("d").as_string();
+			Debug("Path data attribute is \"%s\"", d.c_str());
+			AddPathFromString(d, Rect(bounds.x,bounds.y,width,height));
+			
+		}
+	}
+	
+	//Fatal("Done");
+	
+	
+
+}
+
+// Behold my amazing tokenizing abilities
+static string & GetToken(const string & d, string & token, unsigned & i)
 {
-	m_objects.bounds.push_back(Rect(x, y, w, h));
-	m_count++;
+	token.clear();
+	while (i < d.size() && iswspace(d[i]))
+	{
+		++i;
+	}
+	
+	while (i < d.size())
+	{
+		if (d[i] == ',' || isalpha(d[i]) || iswspace(d[i]))
+		{
+			if (token.size() == 0 && !iswspace(d[i]))
+			{
+				token += d[i++];
+			}
+			break;	
+		}
+		token += d[i++];
+	}
+	Debug("Got token \"%s\"", token.c_str());
+	return token;
+}
+
+
+// Fear the wrath of the tokenizing svg data
+// Seriously this isn't really very DOM-like at all is it?
+void Document::AddPathFromString(const string & d, const Rect & bounds)
+{
+	Real x[3] = {0,0,0};
+	Real y[3] = {0,0,0};
+	
+	string token("");
+	string command("m");
+	
+	unsigned i = 0;
+	unsigned prev_i = 0;
+	Real x0;
+	Real y0;
+	bool started = false;
+	while (i < d.size() && GetToken(d, token, i).size() > 0)
+	{
+		if (isalpha(token[0]))
+			command = token;
+		else
+		{
+			i = prev_i; // hax
+			if(command == "")
+				command = "l";
+		}
+			
+		if (command == "m")
+		{
+			Debug("Construct moveto command");
+			x[0] = strtod(GetToken(d,token,i).c_str(),NULL) / bounds.w;
+			assert(GetToken(d,token,i) == ",");
+			y[0] = strtod(GetToken(d,token,i).c_str(),NULL) / bounds.h;
+			if (!started)
+			{
+				x0 = x[0];
+				y0 = y[0];
+				started = true;
+			}
+			Debug("mmoveto %f,%f", Float(x[0]),Float(y[0]));
+			command = "l";
+		}
+		else if (command == "c")
+		{
+			Debug("Construct curveto command");
+			x[0] = strtod(GetToken(d,token,i).c_str(),NULL)/bounds.w;
+			assert(GetToken(d,token,i) == ",");
+			y[0] = strtod(GetToken(d,token,i).c_str(),NULL)/bounds.h;
+			
+			x[1] = strtod(GetToken(d,token,i).c_str(),NULL) / bounds.w;
+			assert(GetToken(d,token,i) == ",");
+			y[1] = strtod(GetToken(d,token,i).c_str(),NULL) / bounds.h;
+			
+			x[2] = strtod(GetToken(d,token,i).c_str(),NULL) / bounds.w;
+			assert(GetToken(d,token,i) == ",");
+			y[2] = strtod(GetToken(d,token,i).c_str(),NULL) / bounds.h;
+			
+			unsigned index = AddBezierData(Bezier(x[0],y[0],x[1],y[1],x[2],y[2]));
+			Add(BEZIER,bounds,index);
+			
+			
+			Debug("[%u] curveto %f,%f %f,%f %f,%f", index, Float(x[0]),Float(y[0]),Float(x[1]),Float(y[1]),Float(x[2]),Float(y[2]));
+			
+			x[0] = x[2];
+			y[0] = y[2];
+
+			
+		}
+		else if (command == "l")
+		{
+			Debug("Construct lineto command");
+		
+			x[1] = strtod(GetToken(d,token,i).c_str(),NULL) / bounds.w;
+			assert(GetToken(d,token,i) == ",");
+			y[1] = strtod(GetToken(d,token,i).c_str(),NULL) / bounds.h;
+			
+			x[2] = x[1];
+			y[2] = y[1];
+
+			Rect segment_bounds(x[0], y[0], x[2] - x[0], y[2] - y[0]);
+			
+			unsigned index = AddBezierData(Bezier(x[0],y[0],x[1],y[1],x[2],y[2]));
+			Add(BEZIER,bounds,index);
+			
+			Debug("[%u] lineto %f,%f %f,%f", index, Float(x[0]),Float(y[0]),Float(x[1]),Float(y[1]));
+			
+			x[0] = x[2];
+			y[0] = y[2];
+
+		}
+		else if (command == "z")
+		{
+			Debug("Construct returnto command");
+			x[1] = x0;
+			y[1] = y0;
+			x[2] = x0;
+			y[2] = y0;
+			
+			unsigned index = AddBezierData(Bezier(x[0],y[0],x[1],y[1],x[2],y[2]));
+			Add(BEZIER,bounds,index);
+			
+			Debug("[%u] returnto %f,%f %f,%f", index, Float(x[0]),Float(y[0]),Float(x[1]),Float(y[1]));
+			
+			x[0] = x[2];
+			y[0] = y[2];
+			command = "m";
+		}
+		else
+		{
+			Warn("Unrecognised command \"%s\", set to \"m\"", command.c_str());
+			command = "m";
+		}
+		prev_i = i;
+	}
 }