typedef struct tagTTPOLYCURVE {
UINT wType;
UINT cpfx;
POINTFX apfx[1];
} TTPOLYCURVE;The TTPOLYCURVE structure contains information about a curve in the outline of a TrueType character.
wType
Specifies the type of curve described by the structure. This member can be one of the following values:
| Value | Meaning |
| TT_PRIM_LINE | Curve is a polyline. |
| TT_PRIM_QSPLINE | Curve is a quadratic spline. |
cpfx
Specifies the number of POINTFX structures in the array.
apfx
Specifies an array of POINTFX structures that define the polyline or quadratic spline.
When an application calls the GetGlyphOutline function, a glyph outline for a TrueType character is returned in a TTPOLYGONHEADER structure followed by as many TTPOLYCURVE structures as are required to describe the glyph. All points are returned as POINTFX structures and represent absolute positions, not relative moves. The starting point given by the pfxStart member of the TTPOLYGONHEADER structure is the point at which the outline for a contour begins. The TTPOLYCURVE structures that follow can be either polyline records or spline records.
Polyline records are a series of points; lines drawn between the points describe the outline of the character. Spline records represent the quadratic curves used by TrueType (that is, quadratic b-splines).