2001.11.08 04:32 "using TIFFWriteScanline", by Bryce Loughnan
Hi
I'm trying to make an 8 bit grayscale tiff using TIFFWriteScanline. I'm not sure what I'm doing wrong. I'm unsure about rowsperstrip. I have read through the docs, specs and examples. But I don't seem to get it.
Hopefully this is trivial to someone out there. Any help would be great!
thanx
bryce
{
uint32 w = 100;
uint32 h = 100;
uint16 spp = 1;
uint16 photometric = PHOTOMETRIC_MINISBLACK;
uint16 compression = COMPRESSION_NONE;
TIFF* out = TIFFOpen("output.tif", "w");
TIFFSetField(out, TIFFTAG_IMAGEWIDTH, w);
TIFFSetField(out, TIFFTAG_IMAGELENGTH, h);
TIFFSetField(out, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
TIFFSetField(out, TIFFTAG_SAMPLESPERPIXEL, spp);
TIFFSetField(out, TIFFTAG_BITSPERSAMPLE, 8);
TIFFSetField(out, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
TIFFSetField(out, TIFFTAG_PHOTOMETRIC, 1);
TIFFSetField(out, TIFFTAG_COMPRESSION, compression);
TIFFSetField(out, TIFFTAG_ROWSPERSTRIP, 1);
TIFFSetField(out, TIFFTAG_XRESOLUTION, 1);
TIFFSetField(out, TIFFTAG_YRESOLUTION, 1);
TIFFSetField(out, TIFFTAG_RESOLUTIONUNIT, 3);
unsigned char values[100];
int i;
for(i=0; i < 100; i++)
values[i]= 255;
//values[i]= 100;
for (i=0; i < 100; i++)
{
TIFFWriteScanline(out, values, h, 0);
}
TIFFClose(out);
}
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