2013.04.28 06:37 "Re: [Tiff] Problem with TIFFReadEndcodeStrip()", by Steve McKinney
BTW, using libtiff 4.0.1.
From: Bob Friesenhahn [mailto:firstname.lastname@example.org]
Sent: Saturday, April 27, 2013 6:22 PM
To: Steve McKinney
Subject: Re: [Tiff] Problem with TIFFReadEndcodeStrip()
On Sat, 27 Apr 2013, Steve McKinney wrote:
> I?ve been just about tearing my hair out trying to track down the
> cause of an access violation when attempting to read a JPEG compressed
> TIFF using TIFFReadEncodedStrip(). After some research and fiddling I
> found I was able to work around the problem by setting
TIFFTAG_JPEGCOLORMODE to JPEGCOLORMODE_RGB before beginning to read the
TIFF. All well and good, but *why* do I have to do this? And should
libtiff really crash if I don?t?
The JPEG is likely in YCbCr format and may be subsampled as well.
Setting TIFFTAG_JPEGCOLORMODE to JPEGCOLORMODE_RGB causes libjpeg to return
RGB pixels instead.
You did not provide enough information for me to say any more.
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/