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glutUseLayer -- Allows you to switch between normal and layer mode.
OpenGLUT - overlays
layer Whether to be in a layer or in the normal window.
By default, OpenGLUT operates in "normal" mode, with respect to layers. If you have a layer open and wish to operate on the layer, you must
layer can take on the following values, indicating the layer mode to use:
It is unclear what the consequences are if you are in GLUT_OVERLAY mode and switch to another (or the same) window via glutSetWindow().
What if the target has a layer? What if it doesn't?
SEE ALSO glutEstablishOverlay(3)glutRemoveOverlay(3)glutPostOverlayRedisplay(3)glutPostWindowOverlayRedisplay(3)glutShowOverlay(3)glutHideOverlay(3)
Check Out this Related Man Page
UNTITLED LOCAL UNTITLED
glutSwapBuffers -- Swaps the buffers for the current window.
OpenGLUT - window
This function signals to OpenGLUT that you are done drawing to the current window for now. If your window is double-buffered ( GLUT_DOU-
BLE param to glutInitDisplayMode()), then OpenGLUT will swap the front buffer with the back buffer.
This also computes your current frame-rate and prints the result on stderr if indicated by the GLUT_FPS environment variable. The com-
puted value is not necessarily the total frame rate, if you have multiple windows, as the statistic is the total number of buffer-swaps for
the entire program.
This function has no effect if your window is GLUT_SINGLE .
Frame rate is only calculated for double-buffered windows.
How does this interact with overlays?
Consider making GLUT_FPS keep per-window stats in a multi-window program.
SEE ALSO glutPostRedisplay(3)glutPostOverlayRedisplay(3)glutPostWindowRedisplay(3)glutPostWindowOverlayRedisplay(3)glutInitDisplaymode(3)
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