Xlib 中的 xcb_shm_get_image 等效项

Question

I am currently porting a program from XCB to XLib*. Now I have a point where the image of the XServer gets grabbed via xcb_shm_get_image . xcb_shm_get_image has the option in defining what portions of the image you want to grab, given x and y , width and height parameters. Is there a way to achieve the same with XShmGetImage ?

*XCB has a Bug in the current debian stable rendering it useless for my needs.

Answer 1

Bool XShmGetImage(
    register Display *dpy,
    Drawable d,
    XImage *image,
    int x, int y,
    unsigned long plane_mask);

With XShmGetImage() you specify x & y as arguments to the function, and the height and width are taken from the image you pass as the destination to copy the pixels into.