pic_rw.h

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/* This code is based on the GIMP-PIC plugin by Halfdan Ingvarsson, 
 * and relicensed from GPL to LGPL to accomodate the KDE licensing policy
 * with his permission.
 * These is the original copyright:
 * Copyright (C) 1998 Halfdan Ingvarsson
 */

#ifndef __PIC_RW_H__
#define __PIC_RW_H__

#define PIC_MAGIC_NUMBER  0x5380f634

#include <QtCore/QFile>
#include <QtGui/QImageIOPlugin>
#include <QtGui/QColor>

typedef enum {
    NONE = 0, /* No picture */
    ODD = 1, /* Odd scanlines */
    EVEN = 2, /* Even scanlines */
    BOTH = 3 /* Every scanline */
} PICFields;

typedef enum {
    UNCOMPRESSED = 0, /* Image is uncompressed */
    RLE = 2 /* Run length compression */
} PICChannelType;

typedef enum {
    RED = 0x80, /* Red channel */
    GREEN = 0x40, /* Green channel */
    BLUE = 0x20, /* Blue channel */
    ALPHA = 0x10 /* Alpha channel */
} PICChannelCode;

typedef struct {
    qint32 magic; /* PIC_MAGIC_NUMBER */
    float version; /* Version of format */
    char comment[80]; /* Prototype description */
    char id[4]; /* "PICT" */
    qint16 width; /* Image width, in pixels */
    qint16 height; /* Image height, in pixels */
    float ratio; /* Pixel aspect ratio */
    qint16 fields; /* Picture field type */
    qint16 pad; /* Unused */
} PICHeader;

typedef struct {
    char chained; /* 1 if another packet follows, else 0 */
    char size; /* Bits per pixel by channel */
    char type; /* RLE or uncompressed */
    char channel; /* Channel code (which planes are affected by this channel) */
} PICChannel;

#define HEADER_SIZE sizeof(PICHeader)
#define CHANNEL_SIZE sizeof(PICChannel)


bool picReadHeader(QIODevice *dev, PICHeader *hdr, bool peek = false);

void pic_read(QIODevice *dev, QImage *img);

void pic_write(QIODevice *dev, const QImage *img);


#endif//__PIC_RW_H__