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2008.01.16 22:44 "Q: TIFFWriteRawTile()", by Timur Ametov

2008.01.16 23:23 "Re: Q: TIFFWriteRawTile()", by Frank Warmerdam

2008.01.17 09:20 "Re: Q: TIFFWriteRawTile()", by Timur Ametov

2008.01.17 12:50 "Re: Q: TIFFWriteRawTile()", by Timur Ametov

2008.01.17 09:20 "Re: Q: TIFFWriteRawTile()", by Timur Ametov

Hello Frank,

I thank you so much for your response

> What version of libtiff are you using?

3.6.2 -> because of Dev C++.
Could it be reason?!

> Looking in the code I see that TIFFWriteRawTile() skips a bunch of stuff
> that is done by TIFFWriteEncodedTile() that might be important for
> rewriting
> tiles such as this:
> 
>     if( td->td_stripbytecount[tile] > 0 )
>          {
>         /* Force TIFFAppendToStrip() to consider placing data at end
>                 of file. */
>              tif->tif_curoff = 0;
>          }
> 
> I never use the "Raw" interfaces so it is entirely possible they are not
> functioning properly with regard to some of the update-in-place logic.
> But - in theory - it is intended that what you want should work if you
> open
> a file in update mode.

I tried now with TIFFWriteEncodedTile() also, but .. could you (or maybe
somebody else) make a loon on my code. God knows, maybe there is a mistake,
that nobody accept me would make :)

#include <windows.h>
#include <stdio.h>
#include <time.h>
#include "multibmp.h"
#include <tiffio.h>
#include <string.h>

int main()
{
    int width, height;
    width = 160;
    height = 160;
    char block[32*32];
    char block2[32*32];
    char block3[32*32];
    for (int i=0; i<sizeof(block);i++)
    {
        block[i]  = char(i/16 + 127);
        block2[i] = char(255);
        block3[i] = char();
    }

    TIFF *tif = TIFFOpen("d:/test/multiTIFF.tif", "w");

    TIFFSetField(tif, TIFFTAG_IMAGEWIDTH, width);
    TIFFSetField(tif, TIFFTAG_IMAGELENGTH, height);
    TIFFSetField(tif, TIFFTAG_XRESOLUTION, 150.0);
    TIFFSetField(tif, TIFFTAG_YRESOLUTION, 150.0);
    TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 8);
    TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, 1);
    TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP, 1);
    TIFFSetField(tif, TIFFTAG_TILEWIDTH, 32);
    TIFFSetField(tif, TIFFTAG_TILELENGTH, 32);
    TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_MINISBLACK);
    TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
    TIFFSetField(tif, TIFFTAG_RESOLUTIONUNIT, RESUNIT_INCH);

    tsize_t tileSize = TIFFTileSize(tif);
    int tile_nr = 0;

    for (int i=0; i<25; i=i+2)
    {
        tile_nr = i;
        TIFFWriteRawTile(tif, tile_nr, &block, tileSize);
    }

    for (int i=1; i<23; i=i+2)
    {
        tile_nr = i;
        TIFFWriteRawTile(tif, tile_nr, &block, tileSize);
    }
    TIFFClose(tif);

    // I also tried with "w"
    tif = TIFFOpen("d:/test/multiTIFF.tif", "a");
    TIFFSetField(tif, TIFFTAG_IMAGEWIDTH, width);
    TIFFSetField(tif, TIFFTAG_IMAGELENGTH, height);
    TIFFSetField(tif, TIFFTAG_XRESOLUTION, 150.0);
    TIFFSetField(tif, TIFFTAG_YRESOLUTION, 150.0);
    TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 8);
    TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, 1);
    TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP, 1);
    TIFFSetField(tif, TIFFTAG_TILEWIDTH, 32);
    TIFFSetField(tif, TIFFTAG_TILELENGTH, 32);
    TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_MINISBLACK);
    TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
    TIFFSetField(tif, TIFFTAG_RESOLUTIONUNIT, RESUNIT_INCH);

    for (int i=1; i<23; i=i+2)
    {
        tile_nr = i;
        TIFFWriteRawTile(tif, tile_nr, &block2, tileSize);
    }
    TIFFClose(tif);

    system("pause");
    return 0;
}

Thank you guys,

Tim
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