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Thread: using QPixmap to transparent image

  1. #1
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    Question using QPixmap to transparent image

    Hi, guys, I want to use QPixmap to translate a PNG picture which is not transparent, into a transparent one. But the following codes does not work, for some compiling errors:

    Qt Code:
    1. int main(int argc, char *argv[])
    2. {
    3. QApplication a(argc, argv);
    4. if(argc < 2)
    5. {
    6. //
    7. std::cout << "no original picture file !" << std::endl;
    8. return 0;
    9. }
    10.  
    11. QPixmap pix(QString(argv[1])); //original picture
    12. pix.setMask(pix.createHeuristicMask());
    13. QString toWrite("out.png");
    14. if(argc == 3)
    15. {
    16. toWrite = argv[2];
    17. }
    18. pix.save(toWrite, "PNG");
    19. return a.exec();
    20. }
    To copy to clipboard, switch view to plain text mode 

    How can the compiler complain that the pix is non-class type"QPixmap"?

    Thanks in advance!

  2. #2
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    Default Re: using QPixmap to transparent image

    Did you included this ?
    Qt Code:
    1. #include <QPixmap>
    To copy to clipboard, switch view to plain text mode 

  3. #3
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    Default Re: using QPixmap to transparent image

    Quote Originally Posted by borisbn View Post
    Did you included this ?
    Qt Code:
    1. #include <QPixmap>
    To copy to clipboard, switch view to plain text mode 
    thanks, but uh, I have include the necessary header files in the source file. but still some compiling errors.

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