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April 2005

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2005.04.17 06:12 "How do I access the data once I use TIFFReadEncodedStrip?", by Phillip Wiles
2005.04.17 06:33 "Re: How do I access the data once I use TIFFReadEncodedStrip?", by Chris Losinger
2005.04.18 20:56 "Re: How do I access the data once I use TIFFReadEncodedStrip?", by Phillip Wiles

2005.04.17 06:12 "How do I access the data once I use TIFFReadEncodedStrip?", by Phillip Wiles

I'm using a small sample tiff (that is Group 3 compressed) and would 
like to get it to display out in window as: 00000111000
Which gives me this:
c:\main.cpp(30) : error C2036: 'void *' : unknown size
c:\main.cpp(30) : error C2679: binary '<<' : no operator defined which 
takes a right-hand operand of type 'void' (or there is no acceptable 
conversion)

Is it because I'm trying to use std::cout calls, or am I completely not 
understanding how buf works?


int main(int nArg, char* pszArgs[]){
    TIFF *tif=TIFFOpen("smile.tif", "r");
    if (tif) {
        tdata_t buf;
        tstrip_t strip;
        buf = _TIFFmalloc(TIFFStripSize(tif));
        for (strip = 0; strip < TIFFNumberOfStrips(tif); strip++)
        {
            TIFFReadEncodedStrip(tif, strip, buf, (tsize_t) -1);
        }

// Begin my code that doesn't work.
        unsigned int width;
        TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &width);       
        unsigned int height;
        TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &height);      
        for (unsigned int x = 0; x < width; x++){
            for (unsigned int y = 0; y < height; y++){
                std::cout << buf[x + (height * y)];
            }
            std::cout << "\n";
        }
    _TIFFfree(buf);
    TIFFClose(tif);
    }
    return 0;
}

SubFileType (1 Long): Zero
ImageWidth (1 Short): 40
ImageLength (1 Short): 40
BitsPerSample (1 Short): 1
Compression (1 Short): Group 3 Fax (aka CCITT FAX3)
Photometric (1 Short): MinIsBlack
StripOffsets (1 Long): 44
SamplesPerPixel (1 Short): 1
RowsPerStrip (1 Long): 40
StripByteCounts (1 Long): 158
XResolution (1 Rational): 300
YResolution (1 Rational): 300
Group3Options (1 Long): 0
ResolutionUnit (1 Short): Inch
DateTime (20 ASCII): 2005:04:17 09:32:23