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/* This file is part of Strigi Desktop Search, ported from code of:
* Copyright (C) 2004 Melchior FRANZ <mfranz@kde.org>
*
* Copyright (C) 2007 Flavio Castelli <flavio.castelli@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "rgbthroughanalyzer.h"
#include <strigi/textutils.h>
#include <strigi/strigiconfig.h>
#include <strigi/analysisresult.h>
#include <strigi/fieldtypes.h>
#include <cstring>
#include <map>
using namespace std;
using namespace Strigi;
// AnalyzerFactory
// The SGI Image File Format
// http://local.wasp.uwa.edu.au/~pbourke/dataformats/sgirgb/sgiversion.html
void
RgbThroughAnalyzerFactory::registerFields(FieldRegister& reg) {
widthField = reg.registerField(
"http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#width");
heightField = reg.registerField(
"http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#height");
bitDepthField = reg.registerField(
"http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#colorDepth");
imageNameField = reg.registerField(
"http://www.semanticdesktop.org/ontologies/2007/01/19/nie#title");
sharedRowsField = reg.registerField(
"http://strigi.sf.net/ontologies/homeless#documentImageSharedRows");
colorModeField = reg.registerField(
"http://freedesktop.org/standards/xesam/1.0/core#colorSpace");
compressionField = reg.registerField(
"http://freedesktop.org/standards/xesam/1.0/core#compressionAlgorithm");
}
// Analyzer
void
RgbThroughAnalyzer::setIndexable(AnalysisResult* i) {
analysisResult = i;
}
InputStream*
RgbThroughAnalyzer::connectInputStream(InputStream* in) {
if (!in)
return in;
const char *c;
uint16_t magic;
uint8_t storage;
uint8_t bpc;
uint16_t dimension;
uint16_t xsize;
uint16_t ysize;
uint16_t zsize;
int32_t colormap;
//Remember: dds files are big-endian
//read the beginning of the stream and make sure it looks ok
const int64_t pos = in->position();
in->reset(pos); // rewind to the start of the stream
if (512 != in->read(c, 512, 512)) {
in->reset(pos);
return in;
}
in->reset(pos);
magic = readBigEndianUInt16(c);
if (magic != 474) {
return in;
}
storage = (uint8_t)*(c+2);
bpc = (uint8_t)*(c+3);
dimension = readBigEndianUInt16(c+4);
xsize = readBigEndianUInt16(c+6);
ysize = readBigEndianUInt16(c+8);
zsize = readBigEndianUInt16(c+10);
//pixmin = readBigEndianUInt32(c+12);
//pixmax = readBigEndianUInt32(c+16);
//dummy = readBigEndianUInt32(c+20);
colormap = readBigEndianUInt32(c+104);
// check ranges
if ((storage != 1 && storage != 0) || (bpc != 1 && bpc != 2)
|| dimension < 1 || dimension > 3
|| colormap < 0 || colormap > 3) {
// not a valid RGB file
return in;
}
string imagename(c+24, 79); // should be 79 ascii characters
if (dimension == 1)
ysize = 1;
// report analysis
analysisResult->addValue( factory->widthField, xsize );
analysisResult->addValue( factory->heightField, ysize );
analysisResult->addValue( factory->bitDepthField, zsize * 8 * bpc );
if (imagename[0] != '\0') {
analysisResult->addValue( factory->imageNameField, imagename);
}
/* //FIXME: either get rid of this or replace with NIE equivalent
if (zsize == 1)
analysisResult->addValue( factory->colorModeField, "Grayscale");
else if (zsize == 2)
analysisResult->addValue( factory->colorModeField, "Grayscale/Alpha");
else if (zsize == 3)
analysisResult->addValue( factory->colorModeField, "RGB");
else if (zsize == 4)
analysisResult->addValue( factory->colorModeField, "RGB/Alpha");
if (storage == 0) {
analysisResult->addValue( factory->compressionField, "Uncompressed");
} else if (storage == 1) {
analysisResult->addValue( factory->compressionField,
string ("Runlength Encoded"));
}
*/
return in;
}
bool
RgbThroughAnalyzer::isReadyWithStream() {
return true;
}
//Factory
class Factory : public AnalyzerFactoryFactory {
public:
list<StreamThroughAnalyzerFactory*>
streamThroughAnalyzerFactories() const {
list<StreamThroughAnalyzerFactory*> af;
af.push_back(new RgbThroughAnalyzerFactory());
return af;
}
};
STRIGI_ANALYZER_FACTORY(Factory)
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