Comp Info

Availability LightWave 6.0 | Component Layout | Header lwrender.h

The compositing info global identifies the images being used as the background, foreground and foreground alpha images. This data structure is read-only.

Global Call

   LWCompInfo *compinfo;
   compinfo = global( LWCOMPINFO_GLOBAL, GFUSE_TRANSIENT );

The global function returns a pointer to an LWCompInfo.

   typedef struct st_LWCompInfo {
      LWImageID bg;
      LWImageID fg;
      LWImageID fgAlpha;
   } LWCompInfo;

bg: The background image.
fg: The foreground image.
fgAlpha: The foreground alpha image.

Example

This code fragment retrieves information about the background image.

   #include <lwserver.h>
   #include <lwrender.h>
   #include <lwimage.h>

   LWCompInfo *compinfo;
   LWImageList *imglist;
   char *name;
   int width, height;

   compinfo = global( LWCOMPINFO_GLOBAL, GFUSE_TRANSIENT );
   imglist = global( LWIMAGELIST_GLOBAL, GFUSE_TRANSIENT );
   if ( !compinfo || !imglist ) goto ErrorBadGlobal;

   name = imglist->name( compinfo.bg );
   imglist->size( compinfo.bg, &width, &height );
   ...