QImage/QPixmap size limitations?

Question

Are there any known size/space limitation of QPixmap and/or QImage objects documented? I did not find any useful information regarding this. I\'m c

Answer 1

Both are limited to 32767x32767 pixels. That is, you can think of them as using a signed 16-bit value for both the X and Y resolution.

No axis can ever exceed 32767 pixels, even if the other axis is only 1 pixel. Operating system "bitness" does not affect the limitation. The underlying system may run into other limits, such as memory as you mentioned, before such a huge image can be created.

You can see an example of this limitation in the following source code: http://git.zx2c4.com/qt/plain/src/gui/image/qpixmap_x11.cpp

if (uint(w) >= 32768 || uint(h) >= 32768) {
    w = h = 0;
    is_null = true;
    return;
}