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Next: 9.3 glutDeviceGet Up: 9 State Retrieval Previous: 9.1 glutGet

9.2 glutLayerGet

  glutLayerGet retrieves GLUT state pertaining to the layers of the current window.

Usage

int glutLayerGet(GLenum info);
info
Name of device information to retrieve.

GLUT_OVERLAY_POSSIBLE
Whether an overlay could be established for the current window given the current initial display mode. If false, glutEstablishOverlay will fail with a fatal error if called.
GLUT_LAYER_IN_USE
Either GLUT_NORMAL or GLUT_OVERLAY depending on whether the normal plane or overlay is the layer in use.
GLUT_HAS_OVERLAY
If the current window has an overlay established.
GLUT_TRANSPARENT_INDEX
The transparent color index of the overlay of the current window; negative one is returned if no overlay is in use.
GLUT_NORMAL_DAMAGED
True if the normal plane of the current window has damaged (by window system activity) since the last display callback was triggered. Calling glutPostRedisplay will not set this true.
GLUT_OVERLAY_DAMAGED
True if the overlay plane of the current window has damaged (by window system activity) since the last display callback was triggered. Calling glutPostRedisplay or glutPostOverlayRedisplay will not set this true. Negative one is returned if no overlay is in use.

Description

glutLayerGet retrieves GLUT layer information for the current window represented by integers. The info parameter determines what type of layer information to return.



next up previous contents index
Next: 9.3 glutDeviceGet Up: 9 State Retrieval Previous: 9.1 glutGet



Mark Kilgard
Fri Feb 23 08:05:02 PST 1996