seqSchema.cpp File Reference

#include "seqSchema.h"
#include <iostream>
#include <assert.h>

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Enumerations
enum	{ kHorDir, kUpDir, kDownDir }

Functions
static double	computeHorzGap (schema *a, schema *b)
	Compute the horizontal gap needed to draw the internal wires. More...
static int	direction (const point &a, const point &b)
	Compute the direction of a connection. More...
schema *	makeSeqSchema (schema *s1, schema *s2)
	Make a sequential schema. More...

Enumeration Type Documentation

anonymous enum

Enumerator
kHorDir
kUpDir
kDownDir

Definition at line 29 of file seqSchema.cpp.

{kHorDir, kUpDir, kDownDir}; 

Function Documentation

static double computeHorzGap ( schema *  a, schema *  b  )

static

Compute the horizontal gap needed to draw the internal wires.

It depends on the largest group of connections that go in the same direction.

Definition at line 325 of file seqSchema.cpp.

References direction(), dWire, schema::height(), schema::inputPoint(), schema::inputs(), kDownDir, kLeftRight, kUpDir, max(), schema::outputPoint(), schema::outputs(), and schema::place().

Referenced by makeSeqSchema().

{
    assert(a->outputs() == b->inputs());

    if (a->outputs() == 0) {
        return 0;
    } else {
        // store here the size of the largest group for each direction
        int MaxGroupSize[3]; for(int i=0; i<3; i++) MaxGroupSize[i]=0;

        // place a and b to have valid connection points
        double ya = max(0.0, 0.5*(b->height() - a->height()));
        double yb = max(0.0, 0.5*(a->height() - b->height()));
        a->place(0,ya,kLeftRight);
        b->place(0,yb,kLeftRight);

        // init current group direction and size
        int gdir    = direction(a->outputPoint(0), b->inputPoint(0));
        int gsize   = 1;

        // analyze direction of remaining points
        for (unsigned int i=1; i<a->outputs(); i++) {
            int d = direction(a->outputPoint(i), b->inputPoint(i));
            if (d == gdir) {
                gsize++;
            } else {
                if (gsize > MaxGroupSize[gdir])  MaxGroupSize[gdir]=gsize;
                gsize = 1;
                gdir = d;
            }
        }

        // update for last group
        if (gsize > MaxGroupSize[gdir])  MaxGroupSize[gdir]=gsize;

        // the gap required for the connections
        return dWire * max(MaxGroupSize[kUpDir],MaxGroupSize[kDownDir]);
    }
}

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static int direction ( const point &  a, const point &  b  )

static

Compute the direction of a connection.

Note that Y axis goes from top to bottom

Definition at line 313 of file seqSchema.cpp.

References kDownDir, kHorDir, kUpDir, and point::y.

Referenced by seqSchema::collectInternalWires(), computeHorzGap(), and seqSchema::drawInternalWires().

{
    if (a.y > b.y) return kUpDir;       // upward connections
    if (a.y < b.y) return kDownDir;     // downward connection
    return kHorDir;                     // horizontal connections
}

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schema* makeSeqSchema	(	schema *	s1,
		schema *	s2
	)

Make a sequential schema.

May add cables to ensure the internal connections are between the same number of outputs and inputs. Compute an horizontal gap based on the number of upward and downward connections.

Definition at line 43 of file seqSchema.cpp.

References computeHorzGap(), schema::inputs(), makeCableSchema(), makeParSchema(), and schema::outputs().

Referenced by addSchemaInputs(), addSchemaOutputs(), generateAbstractionSchema(), and generateInsideSchema().

{
    unsigned int o = s1->outputs();
    unsigned int i = s2->inputs();

    schema* a = (o < i) ? makeParSchema(s1, makeCableSchema(i-o)) : s1;
    schema* b = (o > i) ? makeParSchema(s2, makeCableSchema(o-i)) : s2;

    return new seqSchema(a, b, computeHorzGap(a,b));
}

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