pointArray_svg_abs()

static size_t pointArray_svg_abs ( POINTARRAY *  pa, char *  output, int  close_ring, int  precision  )

static

Returns maximum size of rendered pointarray in bytes.

Definition at line 646 of file lwout_svg.c.

References getPoint2d_p(), POINTARRAY::npoints, OUT_MAX_DIGS_DOUBLE, OUT_MAX_DOUBLE, OUT_MAX_DOUBLE_PRECISION, trim_trailing_zeros(), pixval::x, POINT2D::x, pixval::y, and POINT2D::y.

Referenced by assvg_line_buf(), and assvg_polygon_buf().

{
        int i, end;
        char *ptr;
        char x[OUT_MAX_DIGS_DOUBLE+OUT_MAX_DOUBLE_PRECISION+1];
        char y[OUT_MAX_DIGS_DOUBLE+OUT_MAX_DOUBLE_PRECISION+1];
        POINT2D pt;

        ptr = output;

        if (close_ring) end = pa->npoints;
        else end = pa->npoints - 1;

        for (i=0 ; i < end ; i++)
        {
                getPoint2d_p(pa, i, &pt);

                if (fabs(pt.x) < OUT_MAX_DOUBLE)
                        sprintf(x, "%.*f", precision, pt.x);
                else
                        sprintf(x, "%g", pt.x);
                trim_trailing_zeros(x);

                /* SVG Y axis is reversed, an no need to transform 0 into -0 */
                if (fabs(pt.y) < OUT_MAX_DOUBLE)
                        sprintf(y, "%.*f", precision, fabs(pt.y) ? pt.y * -1:pt.y);
                else
                        sprintf(y, "%g", fabs(pt.y) ? pt.y * -1:pt.y);
                trim_trailing_zeros(y);

                if (i == 1) ptr += sprintf(ptr, " L ");
                else if (i) ptr += sprintf(ptr, " ");
                ptr += sprintf(ptr,"%s %s", x, y);
        }

        return (ptr-output);
}

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