Questions and postings pertaining to the usage of ImageMagick regardless of the interface. This includes the command-line utilities, as well as the C and C++ APIs. Usage questions are like "How do I use ImageMagick to create drop shadows?".
I'm following the example on the examples website for converting a png with transparency to jpeg.
If this could be a problem the best idea is to have IM replace the transparency with a better color by using either a "-flatten", "-border" or, "-frame" operator to compose the image over a solid color background. Or tile an image underneath.
If anything fails on the examples website, upgrade. The examples website always depends on the very latest ImageMagick release, which is currently ImageMagick 6.3.3-6.
In general I try to keep things up-to-date on the IM examples. However I also try to note major changes when they happen. Not being able to flatten a single image was in a very earily release of IM v6, and deems a bug that was fixed at that time. It was not thought to be worth noting as it was a bug that was reported and fixed very quickly.
Similar bugs were found in -border and -frame and these were fixed when they were found. Oftenn because I started to expoler and experiment with the operator in IM examples.
Resize for example is one area I have not fully explored in IM examples, and as such it has probably not been fully-bugged in terms of its virtual canvas handling. Other areas yet to be looked at fully include image comparsions, convolution techniques, and Video handling.
I have also now started removing some rather verbose sections on IM v5 problems, that have not been relevent for more than 5 years. Speciafically handling -append in the legacy command line way. IM version 6 should have by now replaced IM v5, and any code that still depend on IM v5 quirks are just asking for trouble.
