HP UX Supported Screen Options, HP VISUALIZE-FXConfiguration Hints, Overlay Visuals and Overlay Transparency

Supported Screen Options

The following Screen Options are supported:

•CountTransparentInOverlayVisual

•ImageTextViaBitMap

•EnableIncludeInferiorsFix

•Enable12BitPseudoColorVisual

•DisableGlxVisuals

The following additional screen options are supported on the HP VISUALIZE-FX2, HP VISUALIZE- FX4 (stereo mode) and HP VISUALIZE-FX6 (stereo mode):

•Disable12BitDirectColorVisual

•Disable12BitTrueColorVisual

The following additional screen options are supported on the HP VISUALIZE-FX4 (non-stereo mode) and HP VISUALIZE-FX6 (non-stereo mode):

•Enable12BitDirectColorVisual

•Enable12BitTrueColorVisual

HP VISUALIZE-FX Configuration HintsOverlay Visuals and Overlay Transparency

HP VISUALIZE-FX2/4/6 devices have two visuals in the overlay planes, both depth-8 PseudoColor. The first (default) overlay visual has 256 entries per colormap and no transparency. The second overlay visual has 255 entries per colormap and supports transparency.

To allow applications to determine which visuals are in the overlay planes, both overlay visuals are listed in the "SERVER_OVERLAY_VISUALS" property attached to the root window. The default overlay visual has a transparent type of "0" (None) while the transparent overlay visual has a transparent type of "1" (TransparentPixel).

If you need an overlay colormap that supports transparency, create the colormap using the visual that has transparency in its SERVER_OVERLAY_VISUALS property. To look at the contents of this property, you would use code similar to the following:

{
typedef struct {
VisualID	overlayVisualID;
Card32	transparentType;/* None, TransparentPixel, TransparentMask */
Card32	value;	/* Either pixel value or pixel mask */
Card32	layer;
Page 70		Graphics Administration Guide for HP-UX 10.20