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-Frank,
-
-I attached a file that uses RGBA interface (tif_getimage.c) to read a tiff
-file and convert to a DIB. It's advantage is that it is easy to read *any*
-tiff file suported by libtiff and easily convert it to a DIB. The disadvantage
-is that bilevel (B&W) bitmaps (and all other non-rgba images) are also
-converted to RGBA, thus taking up 32x as much memory as needed (4 bytes per
-pixel, rather than 1 bit). I read tiff files, but don't need to
-write them. And my files are typically small, so the overhead is mostly
-inconsequential. But for bilevel images, I overrode the get() and put()
-routines of the RGBA interface to just copy the data from the input raster
-to the output raster, rather than expanding out to full 32 bit format. It
-would be nice if there were a simple way to handle all palletized images,
-but that would take more custom routines, and it's not that important to me.
-
-Usage:
-
- m_pDIB = (PBITMAPINFOHEADER)::ReadTIFF(pathName);
- if (m_pDIB != 0) {
- m_format = IMAGETYPE_TIF;
- }
-
-This is intended as Win32, but the modifications for new get() and put()
-routines may be independent of platform.
-
-Thanks for your work supporting the forum and the library!
-
-Regards,
-
-Mark James
-mark@james.net