/*
 * Copyright 2013, Gerasim Troeglazov, 3dEyes@gmail.com. All rights reserved.
 * Distributed under the terms of the MIT License.
 */


#ifndef PSD_LOADER_H
#define PSD_LOADER_H

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include <Translator.h>
#include <TranslatorFormats.h>
#include <TranslationDefs.h>
#include <GraphicsDefs.h>
#include <InterfaceDefs.h>
#include <String.h>
#include <DataIO.h>
#include <File.h>
#include <ByteOrder.h>
#include <List.h>

#define PSD_MAX_CHANNELS 16


enum psd_version {
        PSD_FILE = 1,
        PSB_FILE = 2
};


enum psd_compressed_type {
        PSD_COMPRESSED_RAW      = 0,
        PSD_COMPRESSED_RLE = 1
};


enum psd_color_mode {
        PSD_COLOR_MODE_BITS = 0,
        PSD_COLOR_MODE_GRAYSCALE = 1,
        PSD_COLOR_MODE_INDEXED = 2,
        PSD_COLOR_MODE_RGB = 3,
        PSD_COLOR_MODE_CMYK = 4,
        PSD_COLOR_MODE_MULTICHANNEL = 7,
        PSD_COLOR_MODE_DUOTONE = 8,
        PSD_COLOR_MODE_LAB = 9
};


enum psd_color_format {
        PSD_COLOR_FORMAT_UNSUPPORTED,
        PSD_COLOR_FORMAT_BITMAP,
        PSD_COLOR_FORMAT_RGB,
        PSD_COLOR_FORMAT_RGB_A,
        PSD_COLOR_FORMAT_GRAY,
        PSD_COLOR_FORMAT_GRAY_A,
        PSD_COLOR_FORMAT_MULTICHANNEL,
        PSD_COLOR_FORMAT_CMYK,
        PSD_COLOR_FORMAT_CMYK_A,
        PSD_COLOR_FORMAT_LAB,
        PSD_COLOR_FORMAT_LAB_A,
        PSD_COLOR_FORMAT_DUOTONE,
        PSD_COLOR_FORMAT_INDEXED
};


class PSDLoader {
public:
                                        PSDLoader(BPositionIO *stream);
                                        ~PSDLoader();

        status_t                Decode(BPositionIO *target);
        bool                    IsLoaded(void);
        bool                    IsSupported(void);

        BString                 ColorFormatName(void);

private:
        int64                   _GetInt64FromStream(BPositionIO *in);
        int32                   _GetInt32FromStream(BPositionIO *in);
        int16                   _GetInt16FromStream(BPositionIO *in);
        uint8                   _GetUInt8FromStream(BPositionIO *in);
        int8                    _GetInt8FromStream(BPositionIO *in);
        void                    _SkipStreamBlock(BPositionIO *in, size_t count);
        
        status_t                _ParseImageResources(void);

        psd_color_format _ColorFormat(void);

        BPositionIO     *fStream;
        uint8                   *fStreamBuffer;
        size_t                  fStreamSize;
        size_t                  fStreamPos;

        size_t                  fColorModeDataSize;
        size_t                  fColorModeDataPos;
        
        off_t                   fImageResourceSectionSize;
        off_t                   fImageResourceSectionPos;
        
        int32                   fSignature;
        int16                   fVersion;
        int16                   fChannels;
        int32                   fHeight;
        int32                   fWidth;
        int16                   fDepth;
        int16                   fColorFormat;
        int16                   fCompression;

        uint16                  fTransparentIndex;

        bool                    fLoaded;
};


#endif  /* PSD_LOADER_H */