Can't process good old windows bitmap files any more

[DaGaMs]

Another issue: this fairly "standard" .bmp windows bitmap file does not process:

$> vipsthumbnail -s 120 -f test.png bmp_example.bmp 
vipsthumbnail: unable to thumbnail bmp_example.bmp
VipsForeignLoad: "bmp_example.bmp" is not a known file format

I believe this is something to do with the image header - but this also used to work in an older version of vips (8.5.0)?

bmp_example.bmp.zip

[jcupitt]

libvips has nothing for BMP files -- these are loaded via libMagick, the imagemagick wrapper. This is disabled by default on homebrew for security reasons.

Try installing libvips with:

brew install vips --with-imagemagick

[jcupitt]

There are some notes on the "install" page:

http://jcupitt.github.io/libvips/install.html

[DaGaMs]

my bad - will close, sorry!

[jcupitt]

No problem!

[DaGaMs]

hmm, still not happy. I rebuilt vips like this:

brew install --build-from-source vips --with-openslide --with-graphicsmagick --with-openexr --with-webp --with-mozjpeg --with-jpeg-turbo

but I still get the same result from vips:

>$ vipsthumbnail -s 120 -f test.png test/example_data/bmp_example.bmp
vipsthumbnail: unable to thumbnail test/example_data/bmp_example.bmp
VipsForeignLoad: "test/example_data/bmp_example.bmp" is not a known file format

However, it does work when compiling with imagemagick instead of graphicsmagick. I'm not sure if that's a bug?

[jcupitt]

I've not tested with GM for a while, I'll have a go here. Do you know what GM version brew is using?

[DaGaMs]

brew info graphicsmagick gives me

/usr/local/Cellar/graphicsmagick/1.3.27 (479 files, 12MB) *
  Poured from bottle on 2018-01-11 at 15:25:17

[jcupitt]

It's working here with 1.3.26. I'll try 1.3.27.

john@yingna ~/GIT/libvips (8.6) $ ldd `which vipsheader` | grep -i magi
	libGraphicsMagick-Q16.so.3 => /usr/lib/libGraphicsMagick-Q16.so.3 (0x00007f7fff542000)
john@yingna ~/GIT/libvips (8.6) $ vipsheader ~/pics/MARBLES.BMP 
/home/john/pics/MARBLES.BMP: 1419x1001 uchar, 3 bands, rgb, magickload

[jcupitt]

Oh I think I have it, try adding --env=std to your brew build line. This will let vips pick up dependencies from your already-installed packages.

Check the output of configure to make sure it's seen your GM.

[jcupitt]

I tried 1.3.27 and it seems to work. I built GM like this:

$ CFLAGS="-g -Wall" CXXFLAGS="-g -Wall" ./configure --prefix=/home/john/vips --disable-static --enable-shared --with-quantum-depth=16
$ make
$ make install

And then:

$ CFLAGS="-g -Wall" CXXFLAGS="-g -Wall" ./autogen.sh --prefix=/home/john/vips --with-magickpackage=GraphicsMagick
$ make
$ make install
$ ldd `which vipsheader` | grep -i magi
	libGraphicsMagick.so.3 => /home/john/vips/lib/libGraphicsMagick.so.3 (0x00007fdc85f53000)
$ vipsheader ~/pics/MARBLES.BMP 
/home/john/pics/MARBLES.BMP: 1419x1001 uchar, 3 bands, rgb, magickload

[jcupitt]

I'll close. Please reopen if there is still a problem.