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108 lines
3 KiB
C
108 lines
3 KiB
C
/**
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* PIC_RW - Qt PIC Support
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* Copyright (C) 2007 Ruben Lopez <r.lopez@bren.es>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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* ----------------------------------------------------------------------------
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*/
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/* This code is based on the GIMP-PIC plugin by Halfdan Ingvarsson,
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* and relicensed from GPL to LGPL to accomodate the KDE licensing policy
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* with his permission.
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* These is the original copyright:
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* Copyright (C) 1998 Halfdan Ingvarsson
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*/
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#ifndef __PIC_RW_H__
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#define __PIC_RW_H__
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#define PIC_MAGIC_NUMBER 0x5380f634
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#include <QtGui/qimageiohandler.h>
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/**
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* How fields are distributed over the image
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*/
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typedef enum {
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NONE = 0, /* No picture */
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ODD = 1, /* Odd scanlines */
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EVEN = 2, /* Even scanlines */
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BOTH = 3 /* Every scanline */
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} PICFields;
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/**
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* Type of a channel
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*/
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typedef enum {
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UNCOMPRESSED = 0, /* Image is uncompressed */
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RLE = 2 /* Run length compression */
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} PICChannelType;
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/**
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* Channel codes
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*/
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typedef enum {
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RED = 0x80, /* Red channel */
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GREEN = 0x40, /* Green channel */
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BLUE = 0x20, /* Blue channel */
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ALPHA = 0x10 /* Alpha channel */
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} PICChannelCode;
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/**
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* PIC format header
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*/
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typedef struct {
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qint32 magic; /* PIC_MAGIC_NUMBER */
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float version; /* Version of format */
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char comment[80]; /* Prototype description */
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char id[4]; /* "PICT" */
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qint16 width; /* Image width, in pixels */
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qint16 height; /* Image height, in pixels */
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float ratio; /* Pixel aspect ratio */
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qint16 fields; /* Picture field type */
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qint16 pad; /* Unused */
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} PICHeader;
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/**
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* PIC channel header
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*/
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typedef struct {
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char chained; /* 1 if another packet follows, else 0 */
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char size; /* Bits per pixel by channel */
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char type; /* RLE or uncompressed */
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char channel; /* Channel code (which planes are affected by this channel) */
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} PICChannel;
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#define HEADER_SIZE sizeof(PICHeader)
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#define CHANNEL_SIZE sizeof(PICChannel)
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/**
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* Reads the PIC header and checks that it is OK
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* @param dev The QT device to read from
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* @param hdr A pointer to the PIC header
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* @param peek Keep bytes in the device
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* @return true on success
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*/
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bool picReadHeader(QIODevice *dev, PICHeader *hdr, bool peek = false);
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/// Pic read handler for Qt / KDE
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void pic_read(QIODevice *dev, QImage *img);
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/// Pic write handler for Qt / KDE
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void pic_write(QIODevice *dev, const QImage *img);
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#endif//__PIC_RW_H__
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