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May 1994
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1994.05.27 23:30 "Re: handling a strip size that's too big", by Dwight Kelly
>> >> Is there a way to make the TIFF 3.0 (or TIFF 3.3 beta 002) library >> read scanline-sized amounts of data instead of strip-size amounts of data? >> >> The reason I ask is that our scanner produces 40MB TIFF files consisting >> of a single strip. I would like to read the image a scanline (a few KB) >> at a time. However, since the file consists of just 1 strip, when I call >> TIFFReadScanline, the TIFF library apparently creates an internal buffer for >> the entire 40MB strip, which is causing a performance problem. >> >> So to restate my question, is there a way to force TIFF to read >> one scanline instead of the entire strip? I am under the impression that >> TIFFReadEncodedStrip and TIFFReadRawStrip are for reading the entire strip. >> Also, having the scanner write one scanline per strip is not an option. >> > Version 3.3 has an compile time option that will automatically divide large strips into small chunks. define STRIPCHOP_SUPPORT when you build the library. -- Dwight Kelly Essential Technical Services, Inc. 3375 Summit Trail Cumming, GA 30131 (404) 889-2848 (404) 889-2624 fax Internet: dkelly@etsinc.com