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