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Annotation of researchv9/jerq/src/lib/layer/layer.h, revision 1.1.1.1

1.1       root        1: #ifndef LAYER_H
                      2: #define        LAYER_H LAYER_H
                      3: typedef struct Layer{
                      4:        /* The first part looks like (is) a Bitmap */
                      5:        Word *base;
                      6:        unsigned width;
                      7:        Rectangle rect; /* bounding box of layer */
                      8: /* The next fields give us compatability with Rob's layers, and with
                      9:    bitmaps, and let us perform efficiency hacks.  They can safely be
                     10:    set to true, false with no chance of error.  Note that
                     11:    nonevis ==> someobs; all we really care is to find out one of
                     12:    three states: all visible (in which case the following word should
                     13:    be identically zero), all obscured (so that we can skip layerop),
                     14:    and partially obscured and partially visible. */
                     15:        short someobs, nonevis;
                     16:        struct Layer *front;    /* adjacent layer in front */
                     17:        struct Layer *back;     /* adjacent layer behind */
                     18:        Bitmap *obs;            /* Storage for obscured bits */
                     19: }Layer;
                     20: 
                     21: typedef Layer Obscured;
                     22: 
                     23: Rectangle rsubp();
                     24: Layer *newlayer();
                     25: #ifndef        MUX
                     26: extern Layer *lfront, *lback;
                     27: #endif
                     28: #endif

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