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?".
Your gradient image should be fine. It is premade is it not? That is you have created it and have it stored as a 1 row or 1 column image. Correct? If so, then