断言失败。 尝试使用 Magick++ 创建图像

Question

I am trying to run this simple code from thisexample on page 8. I am trying to create an image and then write it but it won't even let me create the image.

This is the code:

#include <Magick++.h>
#include <iostream>

int main()
{
    Magick::Image p("300x300", "red");
    //~ p.write("red.png");
    return 0;
}

Here is the compilation command:

g++ Magick++-config --cppflags --cxxflags --ldflags --libs main.cpp -o main

Here is the error:

main: magick/semaphore.c:606: LockSemaphoreInfo: Assertion `semaphore_info != (SemaphoreInfo *) NULL' failed.
Aborted

I am using Debian 9 on Virtualbox. It compiles perfectly fine. It just doesn't run and I don't know what that error means. I also can't find it online. Can someone please help?

Answer 1

I hadn't initialized magick because I thought that was only for windows users. Here is the updated code.

#include <Magick++.h>
#include <iostream>

int main()
{
    Magick::InitializeMagick(nullptr); // <--- added this line
    Magick::Image p("300x300", "red");
    p.write("red.png");
    return 0;
}

I hope this helps anyone else facing this issue.