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/**
* GraphLCD plugin for the Video Disk Recorder
*
* tiff.c - tiff logo class
*
* (c) 2004 Andreas Brachold <vdr04 AT deltab de>
* (c) 2001-2004 Carsten Siebholz <c.siebholz AT t-online de>
**/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program 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 General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; *
* if not, write to the Free Software Foundation, Inc., *
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
* *
***************************************************************************/
#include <stdio.h>
#include <string.h>
#include <string>
#include <glcdgraphics/bitmap.h>
#include <glcdgraphics/image.h>
#include "tiff.h"
#pragma pack(1)
typedef struct TIFFT{
unsigned short tag;
unsigned short type;
unsigned long length;
/* 1 = BYTE. 8-bit unsigned integer. */
/* 2 = ASCII. 8-bit bytes that store ASCII codes; the last byte must be null. */
/* 3 = SHORT. A 16-bit (2-byte) unsigned integer. */
/* 4 = LONG. A 32-bit (4-byte) unsigned integer. */
/* 5 = RATIONAL. Two LONGs: the first represents the numerator of a fraction, the second the denominator. */
unsigned long off_val;
} TIFFTAG;
#pragma pack()
#define GETANDCHECK { t=fgetc(fIN);if(t==EOF) {fclose(fIN);return false;};}
cTIFFFile::cTIFFFile()
{
}
cTIFFFile::~cTIFFFile()
{
}
bool cTIFFFile::Load(GLCD::cImage & image, const std::string & fileName)
{
FILE *fIN;
TIFFTAG tifftag;
unsigned int tiff_header, tiff_anztags, tiff_data;
unsigned char cl,ch,y,i;
unsigned char height, width, strip, invert;
unsigned char fLittleEndian=0;
int j;
int t;
unsigned char *bitmap = NULL;
bool bInvert = false;
if (fileName.length() > 0)
{
fIN = fopen(fileName.c_str(), "rb");
if (fIN)
{
// isyslog("graphlcd plugin: try to load logo %s.", szFileName);
if (fseek(fIN, 0, SEEK_SET)==EOF)
{
fclose(fIN);
return false;
}
GETANDCHECK; cl=(unsigned char)t;
GETANDCHECK; ch=(unsigned char)t;
if ((cl==0x49) && (ch==0x49))
{
fLittleEndian=1;
}
if (fseek(fIN, 4, SEEK_SET)==EOF)
{
fclose(fIN);
return false;
}
GETANDCHECK; cl=(unsigned char)t;
GETANDCHECK; ch=(unsigned char)t;
tiff_header = cl+256*ch;
//printf("tiff_header:%d %x\n", tiff_header, tiff_header);
if (fseek(fIN, tiff_header, SEEK_SET)==EOF)
{
fclose(fIN);
return false;
}
GETANDCHECK; cl=(unsigned char)t;
GETANDCHECK; ch=(unsigned char)t;
tiff_anztags = cl+256*ch;
//printf("tiff_anztags:%d %x\n", tiff_anztags, tiff_anztags);
height=0;
width=0;
strip=0;
invert=0;
for (i=0; (i<tiff_anztags)&&(!height||!width||!strip||!invert); i++)
{
if (fread(&tifftag, sizeof(tifftag), 1, fIN)!=1)
{
fclose(fIN);
return false;
}
if (tifftag.tag==0x0100) width=tifftag.off_val;
if (tifftag.tag==0x0101) height=tifftag.off_val;
if (tifftag.tag==0x0111) strip=tifftag.off_val;
if (tifftag.tag==0x0106) invert=tifftag.off_val+1;
//printf("tag%d: %d %d %ld %ld\n", i,tifftag.tag, tifftag.type, tifftag.length, tifftag.off_val );
}
if (fseek(fIN,strip, SEEK_SET)==EOF)
{
fclose(fIN);
return false;
}
GETANDCHECK; cl=(unsigned char)t;
GETANDCHECK; ch=(unsigned char)t;
tiff_data = cl+256*ch;
//printf("tiff_data:%d %x\n", tiff_data, tiff_data);
if (fseek(fIN, tiff_data, SEEK_SET)==EOF)
{
fclose(fIN);
return false;
}
image.Clear();
image.SetWidth(width);
image.SetHeight(height);
image.SetDelay(100);
bitmap = new unsigned char[height * ((width + 7) / 8)];
if (bitmap)
{
if (fread(bitmap, height*((width+7)/8), 1, fIN)!=1)
{
delete [] bitmap;
fclose(fIN);
image.Clear();
return false;
}
if (invert-1==1) bInvert = !bInvert; // 'Black is zero'
if (bInvert)
{
for (j=0; j < height * ((width+7)/8); j++)
{
(*(bitmap+j)) = (*(bitmap+j))^0xff;
}
}
// cut the rest of the line
if (width%8)
{
for (y=1; y<=height; y++) {
j=y*((width+7)/8)-1;
(*(bitmap+j)) = ((*(bitmap+j))>>(8-width%8))<<(8-width%8);
}
}
image.AddBitmap(new GLCD::cBitmap(width, height, bitmap));
}
else
{
fprintf(stderr, "ERROR: cannot allocate memory\n");
}
fclose(fIN);
}
else
{
fprintf(stderr, "ERROR: cannot open picture %s\n", fileName.c_str());
}
}
else
{
fprintf(stderr, "ERROR: no szFileName given!\n");
}
return true;
}
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