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2009.05.07 08:14 "[Q] TIFFReadRGBAImage (about read COMPRESSION_JPEG imagefile) of libtiff.", by <masui.ikuhisa@jsol.co.jp>
I am japanese. my name is I.masui. I must be good at English and forgive the thing that cannot be written. It is a question on TIFFReadRGBAImage (about read COMPRESSION_JPEG imagefile) of libtiff. ======= (*Quotation http://www.libtiff.org/libtiff.html) ======= #include "tiffio.h" main(int argc, char* argv[]) { TIFF* tif = TIFFOpen(argv[1], "r"); if (tif) { uint32 w, h; size_t npixels; uint32* raster; TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &w); TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &h); npixels = w * h; raster = (uint32*) _TIFFmalloc(npixels * sizeof (uint32)); if (raster != NULL) { if (TIFFReadRGBAImage(tif, w, h, raster, 0)) { // OK(when COMPRESSION_CCITTFAX4). } else { // error (when COMPRESSION_JPEG) <<<<<<<< } _TIFFfree(raster); } TIFFClose(tif); } exit(0); } (note. COMPRESSION_CCITTFAX4,COMPRESSION_JPEG is got by "uint16 compress; TIFFGetField(m_tif, TIFFTAG_COMPRESSION, &compress);" ====================================================================== It becomes an error by "TIFFReadRGBAImage" at "COMPRESSION_JPEG"-ImageFile(TIFF) though it is possible to read at "COMPRESSION_CCITTFAX4"-ImageFile(TIFF) by the above-mentioned reading method. How can I read at COMPRESSION_JPEG? <<<<<<<< <end>