X-Git-Url: https://git.ucc.asn.au/?p=ipdf%2Fcode.git;a=blobdiff_plain;f=src%2Fdocument.cpp;h=921763a827590e89d5a3d8cbfd6a830387e417ea;hp=e8556ee367f8b3d5a497b66e7212d016613cc0aa;hb=6ad7fc3c833837713405b64a50e62dd128cb7a30;hpb=fd8f00531c67a2a187213ca6830114ff84a8ec4f

diff --git a/src/document.cpp b/src/document.cpp
index e8556ee..921763a 100644
--- a/src/document.cpp
+++ b/src/document.cpp
@@ -1,10 +1,53 @@
 #include "document.h"
-
+#include "bezier.h"
 #include <cstdio>
 
 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());
@@ -14,21 +57,26 @@ void Document::Save(const string & filename)
 
 	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...");
-	written = fwrite(m_objects.types.data(), sizeof(ObjectType), m_objects.types.size(), file);
-	if (written != ObjectCount())
-		Fatal("Only wrote %u objects!", written);
+	WriteChunkHeader(file, CT_OBJTYPES, m_objects.types.size() * sizeof(ObjectType));
+	SaveStructVector<ObjectType>(file, m_objects.types);
 
 	Debug("Object bounds...");
-	written = fwrite(m_objects.bounds.data(), sizeof(Rect), m_objects.bounds.size(), file);
-	if (written != ObjectCount())
-		Fatal("Only wrote %u objects!", written);
-
+	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)
@@ -52,34 +100,55 @@ void Document::Load(const string & filename)
 		Fatal("Couldn't open file \"%s\"", filename.c_str(), strerror(errno));
 
 	size_t read;
-	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());
-
-	m_objects.types.resize(ObjectCount());
-	m_objects.bounds.resize(ObjectCount());
 
-	Debug("Object types...");
-	read = fread(m_objects.types.data(), sizeof(ObjectType), m_objects.types.size(), file);
-	if (read != ObjectCount())
-		Fatal("Only read %u objects!", read);
-	
-	Debug("Object bounds...");
-	read = fread(m_objects.bounds.data(), sizeof(Rect), m_objects.bounds.size(), file);
-	if (read != ObjectCount())
-		Fatal("Only read %u objects!", 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());
 }
 
-void Document::Add(ObjectType type, const Rect & bounds)
+void Document::Add(ObjectType type, const Rect & bounds, unsigned data_index)
 {
 	m_objects.types.push_back(type);
 	m_objects.bounds.push_back(bounds);
-	m_count++;
+	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);
@@ -91,5 +160,8 @@ void Document::DebugDumpObjects()
 
 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);
+	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);
 }