icc_transform: incompatible profile isn't ignored

[dloebl]

Since 1297f2c incompatible source profiles do not seem to be ignored anymore:

Before 1297f2c:

$ vips icc_transform --input-profile=sRGB.icm test.jpg bef.jpg sRGB.icm

(vips:9111): VIPS-WARNING **: 10:55:58.075: profile incompatible with image

original	output

Current master (17ca29a):

$ vips icc_transform --input-profile=sRGB.icm test.jpg now.jpg sRGB.icm

original	output

sRGB.icm
test.jpg

$ vipsheader test.jpg
test.jpg: 640x426 uchar, 4 bands, cmyk, jpegload

[jcupitt]

Hi Daniel,

I added a test for this specific case, but I don't think we can do the general test we used to have :( Thanks for the report!

BTW you could write:

$ vips icc_transform --input-profile=sRGB.icm test.jpg bef.jpg sRGB.icm

As:

$ vips icc_transform --input-profile=srgb test.jpg bef.jpg srgb

Since you can use the libvips built in profile names anywhere you use a profile filename. master has p3 and cmyk as built in profiles as well.