xcf.h

#ifndef XCF_H
#define XCF_H
/*
 * qxcfi.cpp: A Qt 3 plug-in for reading GIMP XCF image files
 * Copyright (C) 2001 lignum Computing, Inc. <allen@lignumcomputing.com>
 * Copyright (C) 2004 Melchior FRANZ <mfranz@kde.org>
 *
 * This plug-in is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */
 
#include <tqimage.h>
#include <tqiodevice.h>
#include <tqvaluestack.h>
#include <tqvaluevector.h>
 
#include "gimp.h"
 
 
extern "C" {
void kimgio_xcf_read(TQImageIO *);
void kimgio_xcf_write(TQImageIO *);
}
 
const float INCHESPERMETER = (100.0 / 2.54);
 
typedef TQValueVector<TQValueVector<TQImage> > Tiles;
 
 
 
class XCFImageFormat {
public:
    XCFImageFormat();
    void readXCF(TQImageIO* image_io);
 
 
private:
    class Layer {
    public:
        TQ_UINT32 width;            
        TQ_UINT32 height;       
        TQ_INT32 type;          
        char* name;         
        TQ_UINT32 hierarchy_offset; 
        TQ_UINT32 mask_offset;      
 
        uint nrows;         
        uint ncols;         
 
        Tiles image_tiles;      
        Tiles alpha_tiles;
        Tiles mask_tiles;       
 
        struct {
            TQ_UINT32 opacity;
            TQ_UINT32 visible;
            TQ_UINT32 show_masked;
            uchar red, green, blue;
            TQ_UINT32 tattoo;
        } mask_channel;
 
        bool active;            
        TQ_UINT32 opacity;      
        TQ_UINT32 visible;      
        TQ_UINT32 linked;       
        TQ_UINT32 preserve_transparency; 
        TQ_UINT32 apply_mask;       
        TQ_UINT32 edit_mask;        
        TQ_UINT32 show_mask;        
        TQ_INT32 x_offset;      
        TQ_INT32 y_offset;      
        TQ_UINT32 mode;         
        TQ_UINT32 tattoo;       
 
        uchar tile[TILE_WIDTH * TILE_HEIGHT * sizeof(TQRgb)];
 
        void (*assignBytes)(Layer& layer, uint i, uint j);
 
        Layer(void) : name(0) {}
        ~Layer(void) { delete[] name; }
    };
 
 
    class XCFImage {
    public:
        TQ_UINT32 width;            
        TQ_UINT32 height;       
        TQ_INT32 type;          
 
        TQ_UINT8 compression;       
        float x_resolution;     
        float y_resolution;     
        TQ_INT32 tattoo;            
        TQ_UINT32 unit;         
        TQ_INT32 num_colors;        
        TQValueVector<TQRgb> palette;   
 
        int num_layers;         
        Layer layer;            
 
        bool initialized;       
        TQImage image;          
 
        XCFImage(void) : initialized(false) {}
    };
 
 
    static int random_table[RANDOM_TABLE_SIZE];
 
    //static int add_lut[256][256]; - this is so lame waste of 256k of memory
    static int add_lut( int, int );
 
    typedef void (*PixelCopyOperation)(Layer& layer, uint i, uint j, int k, int l,
            TQImage& image, int m, int n);
 
    typedef void (*PixelMergeOperation)(Layer& layer, uint i, uint j, int k, int l,
            TQImage& image, int m, int n);
 
    typedef struct {
        bool affect_alpha;      
    } LayerModes;
 
    static const LayerModes layer_modes[];
 
    bool loadImageProperties(TQDataStream& xcf_io, XCFImage& image);
    bool loadProperty(TQDataStream& xcf_io, PropType& type, TQByteArray& bytes);
    bool loadLayer(TQDataStream& xcf_io, XCFImage& xcf_image);
    bool loadLayerProperties(TQDataStream& xcf_io, Layer& layer);
    bool composeTiles(XCFImage& xcf_image);
    void setGrayPalette(TQImage& image);
    void setPalette(XCFImage& xcf_image, TQImage& image);
    static void assignImageBytes(Layer& layer, uint i, uint j);
    bool loadHierarchy(TQDataStream& xcf_io, Layer& layer);
    bool loadLevel(TQDataStream& xcf_io, Layer& layer, TQ_INT32 bpp);
    static void assignMaskBytes(Layer& layer, uint i, uint j);
    bool loadMask(TQDataStream& xcf_io, Layer& layer);
    bool loadChannelProperties(TQDataStream& xcf_io, Layer& layer);
    bool initializeImage(XCFImage& xcf_image);
    bool loadTileRLE(TQDataStream& xcf_io, uchar* tile, int size,
            int data_length, TQ_INT32 bpp);
    static void copyLayerToImage(XCFImage& xcf_image);
    static void copyRGBToRGB(Layer& layer, uint i, uint j, int k, int l,
            TQImage& image, int m, int n);
 
    static void copyGrayToGray(Layer& layer, uint i, uint j, int k, int l,
            TQImage& image, int m, int n);
    static void copyGrayToRGB(Layer& layer, uint i, uint j, int k, int l,
            TQImage& image, int m, int n);
    static void copyGrayAToRGB(Layer& layer, uint i, uint j, int k, int l,
            TQImage& image, int m, int n);
    static void copyIndexedToIndexed(Layer& layer, uint i, uint j, int k, int l,
            TQImage& image, int m, int n);
    static void copyIndexedAToIndexed(Layer& layer, uint i, uint j, int k, int l,
            TQImage& image, int m, int n);
    static void copyIndexedAToRGB(Layer& layer, uint i, uint j, int k, int l,
            TQImage& image, int m, int n);
 
    static void mergeLayerIntoImage(XCFImage& xcf_image);
    static void mergeRGBToRGB(Layer& layer, uint i, uint j, int k, int l,
            TQImage& image, int m, int n);
    static void mergeGrayToGray(Layer& layer, uint i, uint j, int k, int l,
            TQImage& image, int m, int n);
    static void mergeGrayAToGray(Layer& layer, uint i, uint j, int k, int l,
            TQImage& image, int m, int n);
    static void mergeGrayToRGB(Layer& layer, uint i, uint j, int k, int l,
            TQImage& image, int m, int n);
    static void mergeGrayAToRGB(Layer& layer, uint i, uint j, int k, int l,
            TQImage& image, int m, int n);
    static void mergeIndexedToIndexed(Layer& layer, uint i, uint j, int k, int l,
            TQImage& image, int m, int n);
    static void mergeIndexedAToIndexed(Layer& layer, uint i, uint j, int k, int l,
            TQImage& image, int m, int n);
    static void mergeIndexedAToRGB(Layer& layer, uint i, uint j, int k, int l,
            TQImage& image, int m, int n);
 
    static void dissolveRGBPixels(TQImage& image, int x, int y);
    static void dissolveAlphaPixels(TQImage& image, int x, int y);
};
 
#endif