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WDFFile.h

/*
  File: WDFFile.h

  Copyright(C) C. Kotterink, Computed Graphics
*/
#ifndef WDFFILE_H
#define WDFFILE_H

#include<File.h>
#include<Material.h>
#include<Vertex3.h>
#include<Color4.h>

#include<wdf.h>
#include<stack>
#include<map>

class WDFFile : public File
{
public:
    class Chunk
    {
        friend WDFFile;
    public:
        Chunk() {}
        Chunk(uint16 chunk) {
            id = chunk;
            next = 0;
        }
        uint16 getId() {
            return id;
        }
        bool operator ==(uint16 chunk) {
            return chunk == id;
        }
        bool operator !=(uint16 chunk) {
            return chunk != id;
        }
        bool last() {
            return (next == 0);
        }
    private:
        uint16 id;
        uint32 next;
    };

    WDFFile();
    ~WDFFile();

    WDFFile(const string &name);
    uint16 getVersion() {
        return version;
    }
    // Reading
    void read(Chunk &ch);
    bool readNext(Chunk &chunk);
    Vertex3 readVertex();
    Color4 readColor();
    RefMaterial readMaterial(uint16 type);

    // Writing
    void writeChunk(uint16 chunkId);
    void openChunk() {
        chunkStack.push(0);
    }
    void closeChunk() {
        // Chunk chains are always closed, so its is save to pop the stack
        chunkStack.pop();
    }
    void writeVertex(const Vertex3 &v);
    void writeColor(const Color4 &c);
    void writeMaterial(RefMaterial &material);

    // File
    void open(const string &name);
    void create(const string &name);

protected:
    typedef File super;
    typedef stack<uint32> ChukStack;
    typedef map<Material*, uint16> MaterialID;
    typedef map<uint16, RefMaterial> MaterialPool;
    static const uint16 latestVersion;

    void write(Chunk &ch);

    uint16 version;
    bool reading;

    // Stack containing positions of chunks
    //   for writing: A stack of previous pointers
    //   for reading: A stack of next-pointers
    ChukStack chunkStack;

    // Material pools
    MaterialID materialId;          // for writing
    MaterialPool materialPool;      // for reading
};
#endif

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