*Dear all, Recently I worked on a paint application, where I implemented a function to draw whatever a user is scribbling on an image. In the mouseMove event, I called a function to draw with the previous point and the current point as its arguments, using the drawLine function of QPainter.
Now, I noticed that the pixels sent to this function are not continuous but some in-between pixels were being left. I assume that this is due to the delay for a user->kernel and kernel->user mode switch when calling the underlying paint-engine's functions to draw the line. I have looked-up in the documentation of Qt-painting to find how it internally calls drawLines(), which instead creates a qpainterPath to draw a curve, line or whatever we scribble. But I couldn't find how the missing pixels were added in between just knowing the start and end point of a line (though we know that a curve will contain a large set of small lines, each having a start and end point) Is there anyway to track these "missed" pixels i.e to track all the pixels which are being drawn? Thanks you!*
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