????? ??? ???? ?????? ?????? ??????? ???????

?????? ????????? ?????? ?????????
???? ???????: 243285 - ??? ???????? ???? ????? ????? ??? ???????.
????? ???? | ?? ????

??????

???? ?? ???? ?????? Win32 API GetGlyphOutline ?????? ?????? ???????? ?????? ??????? ??????? ?? ?? ???????. ???? ???? ?????? ?????? ??????? ??????? ??? ????? ???????? ?? ????? ??????? B ?????? ????? ?? ??? ????? ?? ??????? ??? Bezier. ?? ???? ??????? ?????? Win32 API PolyBezier ???? ?????? ????????.

??????? ????

???? ??????? ?????? GetGlyphOutline ?? Interface(API) ????? ??????? Win32 ???? ?????? ???????. ???? ????? GGO_NATIVE ????? ?????? ???? ?? ????????? ??????? B Quadratic ?? ???? ?????? ???????. ??? ??????? Splines B quadratic ??? ??????? ???? ?????? ???????? ?????? ??????? ?? ??? ???? ???????. ???? ??????? ?????? ???????? ??? ??? ???? ????? ???? ??? ????? B ?? ?????? ?????? PolyBezier ?? Win32 API.

??????? ??????? B quadratic ?? ??? ????????? parametric ????? ?????? ?????? ????? ????? ???? ?????? ?? ???? ??????. ????? Quadratic ????? parametric ????? ????. ???? ?? ???? ?? API ???? ??????? Quadratic ?????? ???? ??? ??????? ????? ??? ?????? ???? ?? ??? ?? Win32 API ???? ???????? ????? Bezier ??????? PolyBezier.

??? ???? ??? quadratic ????????? B ??????? ?? ????????? ????? ? parametric ????? well-researched ?? ???????? ?? ??? ?????????. ????? ?? ???? ????? ???? ??????. ?? ????? ????????? ?? ???? Item ???????? ???? ???? ????????? ?????? ???? ???? ??????? Quadratic ???? ??? ??? ???????? ???? ???? ??? ??????.

???? ??? ?????? PolyBezier ??????? Quadratic ??? ????? Bezier ????? parametric ????? ???? ?? ???????. ???? ??????? Quadratic ?????? ????? ???? ???? ???? ??????? ?? ????? ???????? ????? ????? ????. ??? ????? ?? ??? ??? ????? ?????? ???? quadratic ??? ?????? ?? ????? ???????? ????????, ?? ??? ??????? ?????? ????? ?? ?? ??? ???????.

????? ???????? ???????? ?? ??? ??????? ????? ?????? ????? ????? ?????? ???? ?????? ??????? GGO_NATIVE ???? ??? ??????? ?????? ?????? GetGlyphOutline. ?????? ?????? ???? ?? ?????? ?????? ????? ????? GGO_NATIVE ?????? ?? ???? TTPOLYGONHEADER. ???? TTPOLYGONHEADER ????????? ???? ????? ?????? ????? ??????? ???? ?? ?????? ??????? ???????. ??????? ?? ????? ????? ?????? ?????? ?? ????????? ?????? ???? ??? ????? ???? ??????? ?? ??? ???? ????.

?????? ?????? Platform SDK ??????? ?? ????? TTPOLYGONHEADER ? TTPOLYCURVE.

???? ????? ?????? ??????? ????? ?? ??? ????? ????? ????? ????? TTPOLYCURVE. ?? ??????? ?? TTPOLYGONHEADER ??????? ????? TTPOLYCURVE ? ?????? ???? ?????? ???? ?? ????. ???? ??? pfxStart ???? ??????? ?????? ???????. ??? ????? ??? ??????? ????? ???? ???? TTPOLYGONHEADER ?????? ????? cb. ???? ????? ???? ??? ???? ????? ?????? ???????. ??? ?????? ??????? ?? ??????? ?????? ??????? ?? ????? ?? ?????? ?????.

????? ?? ??? ????? TTPOLYCURVE (???? ?????) ?? ???? ?????? ??????? B Quadratic ?? ???? ??? ???? ?? ??? ???????? ????? ?????. ??? ????? ??? ???? ?????? ????? cpfxTTPOLYCURVE. ??? ????? ??? ????? ??????? ?? ??? ???? ?? ??? ???????? ????? ?????? ????? wType. ???? ???? ?????? ???? ?????? ?????. ??? ????? ???? ??????? ??????? ?????? ????? apfx.

??? ?? ????? ??? ?????? ??????? ???? ?? ???? ??????? ? ?????? ?????? ???? ????? ??? ?????? ????? ?? ???? ?? ????? TTPOLYGONHEADER ??????. ??? ??? ???? ?????? ????? ??????? ??????? ?????? ??????? ?? ?????? ?????? ??????? ??????. ??? ????? ???? ??????? ??????? ???????? TTPOLYGONHEADER ?? ?????? ?????? ??? ??? ???? ????? ????? ??????.

???? ??? ????? ???????? ???????? ???? ?????? ??????? ??????? ?? ???? ????? ?????? ?????? GGO_NATIVE ?????? ????? ????? ???? Bezier ???? ???? ?? ???? ???????. ??? ??? ????? ????? ???? Bezier ?? ??????? PolyBezier. ??? ??????? ?????? ?????? ?? ???? DrawT2Outline.

?????? ?????? ?????? ????? ???? Bezier ????? ??? ?????? ?????? ??????. ???? ???? ????? ???? Bezier. ???? ?????? PolyBezier ???? ???? ??? ??? ???? ????? ?? ??? Bezier ???? coincident ????? ????? ????? ?????? ????? ????? ??????. ????????? ?????? ??? ???? ???? ???? ??? ???? ??? Bezier ??????.

?? ????? ??? ?????? ?????? GGO_NATIVE ????? ??? ???? ?? ??? ???????? ????? ?? ????? ????? B Quadratic. ????? ?????? ???? ????? ????? ???? ???? ????? B. ??? ?? ??? ??? ???????? ?? Bezier ???????? PolyBezier ???? ????????? ???? ???? ??? ????? ???? ??????? ???? ??? ????? ?????? ?? ????? ???? Beziers ??????.

???? ?? ??????? ????? ?????? ???? ?? ????? ????? ????? B ????? ???? ?????? ????? ???. ?????? ????? ????? "B" ?? ????? ????? ??? ????? ?????? ?????? ?? ?????? ??? ???? ???????. ?? ???? ????? ??? ???? ??? ??? ???? "B" ??????. ????? ???? ????? ??? ???? ??? ?????? ?? ???? ????? ?????? ??? ???? ???? ?????? ??? Bezier.

????????? ???????? ????? ?? ?????? ?????? ??????? ??????? ??? ????? ?? ????? POINTFX ???? ????? ?? ????? ???? ??? ???? ?? ???? ????? ?????? ??????. ????? ?????? ???? ?????? ??? ????? ???? ?? ??? ???? ?????? ????? ??????????. ??? ????? ??? ?????? ?????? ?????? Bezier ?????? ???? ?????? ?? ??? ???? ??? ???????? ??? ???? ???? ?? ??? ????? ????????. ????? ?? ??? ???? ?????? ?????? ??? ???? ?????? ??? ?? ???? quadratic ??????? ??? ????? ??? Bezier.

????? ????? ?????? ?????? Bezier ???? ???????? ???????? ?????? ?????? ?????? ??? ????? ????? TTPOLYGONHEADER. ????? ????? ?????? ???????? ???????? ??????? ??????? ???? ?? ??? ????. ???? ?????? ????? ???? ??? ??? ?????.

?? ???? ????? ??? ???? ?? ??? ???????? ????? (TT_PRIM_LINE) ? ?? ???? ?? ??? ???? ?? ??? ???????? ????? ??? ????? ????? ????? ????? Beziers ?? ?????? AppendPolyLineToBezier. ??? ??? ??????? Quadratic ??????? B (TT_PRIM_QSPLINE) ? ????? ?????? AppendQuadBSplineToBezier ????? ????? ??????? - B Quadratic. ?? ?? ??? ??????? ?????? ???? ????? ?????? ?? ???? ??????? ?? ???? ?????? ???????? ?????? ??. ?? ?? ????? ??? ??????? ??? Bezier ?? ????? ????? Beziers.

????? ??? ?? Bezier ?? ?????? ??????. ??????? ?????? ??????? ?????? ?????? ???? ????? ???? ??? ???????. ??? ??? ?? ?????? MakeBezierFromLine.

?????? ????? quadratic ??? ????? Bezier ????? ????? ???? ???? ?????? ????? ?????? ?? ???? ?????? ????? quadratic. ???????? ?????? ???? ?????? ??????? ?? ?????? MakeBezierFromQBSpline.

??? ???????? ?????? ???? ???????? ???????? ????? ?????? ?????? ??????? ???? CloseContour. ??? ??????? ?????? ??? ??? ???? "?????" ? "???? ??????? ?? ????? Beziers ??? coincident. ?? ??? ??????? ?????? PolyBezier.

??? ?? ??? ??? ???????? ?????? ??? ???? ??????? ?????? TTPOLYGONHEADER ?? ???? ????? ?????? lpHeader ??? ????? ??????? ?? ???? ??????? ???????. ??? ????? ???? ???? ??? ????? ?????? ?????? ?????? ????? ???????? ???????? ???? ?????? ????? ????? ?????.
/****************************************************************************
 *  FUNCTION   : IntFromFixed
 *  RETURNS    : int value approximating the FIXED value.
 ****************************************************************************/ 
int PASCAL NEAR IntFromFixed(FIXED f)
{
    if (f.fract >= 0x8000)
    return(f.value + 1);
    else
    return(f.value);
}

/****************************************************************************
 *  FUNCTION   : fxDiv2
 *  RETURNS    : (val1 + val2)/2 for FIXED values
 ****************************************************************************/ 
FIXED PASCAL NEAR fxDiv2(FIXED fxVal1, FIXED fxVal2)
{
    long l;

    l = (*((long far *)&(fxVal1)) + *((long far *)&(fxVal2)))/2;
    return(*(FIXED *)&l);
}

/****************************************************************************
 *  FUNCTION   : MakeBezierFromLine
 *
 *  PURPOSE    : Converts a line define by two points to a four point Bezier
 *               spline representation of the line in pPts.
 *
 *
 *  RETURNS    : number of Bezier points placed into the pPts POINT array.
 ****************************************************************************/ 
UINT MakeBezierFromLine( POINT *pPts, POINT startpt, POINT endpt )
{
    UINT cTotal = 0;

    // starting point of Bezier
    pPts[cTotal] = startpt;
    cTotal++;

    // 1rst Control, pt == endpoint makes Bezier a line
    pPts[cTotal].x = endpt.x;
    pPts[cTotal].y = endpt.y;
    cTotal++;

    // 2nd Control, pt == startpoint makes Bezier a line
    pPts[cTotal].x = startpt.x;
    pPts[cTotal].y = startpt.y;
    cTotal++;

    // ending point of Bezier
    pPts[cTotal] = endpt;
    cTotal++;
    
    return cTotal;
}

/****************************************************************************
 *  FUNCTION   : MakeBezierFromQBSpline
 *
 *  PURPOSE    : Converts a quadratic spline in pSline to a four point Bezier
 *               spline in pPts.
 *
 *
 *  RETURNS    : number of Bezier points placed into the pPts POINT array.
 ****************************************************************************/ 
UINT MakeBezierFromQBSpline( POINT *pPts, POINTFX *pSpline )
{
    POINT   P0,         // Quadratic on curve start point
            P1,         // Quadratic control point
            P2;         // Quadratic on curve end point
    UINT    cTotal = 0;

    // Convert the Quadratic points to integer
    P0.x = IntFromFixed( pSpline[0].x );
    P0.y = IntFromFixed( pSpline[0].y );
    P1.x = IntFromFixed( pSpline[1].x );
    P1.y = IntFromFixed( pSpline[1].y );
    P2.x = IntFromFixed( pSpline[2].x );
    P2.y = IntFromFixed( pSpline[2].y );

    // conversion of a quadratic to a cubic

    // Cubic P0 is the on curve start point
    pPts[cTotal] = P0;
    cTotal++;
    
    // Cubic P1 in terms of Quadratic P0 and P1
    pPts[cTotal].x = P0.x + 2*(P1.x - P0.x)/3;
    pPts[cTotal].y = P0.y + 2*(P1.y - P0.y)/3;
    cTotal++;

    // Cubic P2 in terms of Qudartic P1 and P2
    pPts[cTotal].x = P1.x + 1*(P2.x - P1.x)/3;
    pPts[cTotal].y = P1.y + 1*(P2.y - P1.y)/3;
    cTotal++;

    // Cubic P3 is the on curve end point
    pPts[cTotal] = P2;
    cTotal++;

    return cTotal;
}


/****************************************************************************
 *  FUNCTION   : AppendPolyLineToBezier
 *
 *  PURPOSE    : Converts line segments into their Bezier point 
 *               representation and appends them to a list of Bezier points. 
 *
 *               WARNING - The array must have at least one valid
 *               start point prior to the address of the element passed.
 *
 *  RETURNS    : number of Bezier points added to the POINT array.
 ****************************************************************************/ 
UINT AppendPolyLineToBezier( LPPOINT pt, POINTFX start, LPTTPOLYCURVE lpCurve )
{
    int     i;
    UINT    cTotal = 0;
    POINT   endpt;
    POINT   startpt;
    POINT   bezier[4];

    endpt.x = IntFromFixed(start.x);
    endpt.y = IntFromFixed(start.y);

    for (i = 0; i < lpCurve->cpfx; i++)
    {
        // define the line segment
        startpt = endpt;
        endpt.x = IntFromFixed(lpCurve->apfx[i].x);
        endpt.y = IntFromFixed(lpCurve->apfx[i].y);

        // convert a line to a bezier representation
        MakeBezierFromLine( bezier, startpt, endpt );

        // append the Bezier to the existing ones
                                    // Point 0 is Point 3 of previous.
        pt[cTotal++] = bezier[1];   // Point 1
        pt[cTotal++] = bezier[2];   // Point 2
        pt[cTotal++] = bezier[3];   // Point 3

    }

    return cTotal;
}


/****************************************************************************
 *  FUNCTION   : AppendQuadBSplineToBezier
 *
 *  PURPOSE    : Converts Quadratic spline segments into their Bezier point 
 *               representation and appends them to a list of Bezier points. 
 *
 *               WARNING - The array must have at least one valid
 *               start point prior to the address of the element passed.
 *
 *  RETURNS    : number of Bezier points added to the POINT array.
 ****************************************************************************/ 
UINT AppendQuadBSplineToBezier( LPPOINT pt, POINTFX start, LPTTPOLYCURVE lpCurve )
{
    WORD                i;
    UINT                cTotal = 0;
    POINTFX             spline[3];  // a Quadratic is defined by 3 points
    POINT               bezier[4];  // a Cubic by 4

    // The initial A point is on the curve.
    spline[0] = start;

    for (i = 0; i < lpCurve->cpfx;)
    {
        // The B point.
        spline[1] = lpCurve->apfx[i++];

        // Calculate the C point.
        if (i == (lpCurve->cpfx - 1))
        {
            // The last C point is described explicitly
            // i.e. it is on the curve.
            spline[2] = lpCurve->apfx[i++];
        }     
        else
        {
            // C is midpoint between B and next B point
            // because that is the on curve point of 
            // a Quadratic B-Spline.
            spline[2].x = fxDiv2(
                lpCurve->apfx[i-1].x,
                lpCurve->apfx[i].x
                );
            spline[2].y = fxDiv2(
                lpCurve->apfx[i-1].y,
                lpCurve->apfx[i].y
                );
        }

        // convert the Q Spline to a Bezier
        MakeBezierFromQBSpline( bezier, spline );
        
        // append the Bezier to the existing ones
                                    // Point 0 is Point 3 of previous.
        pt[cTotal++] = bezier[1];   // Point 1
        pt[cTotal++] = bezier[2];   // Point 2
        pt[cTotal++] = bezier[3];   // Point 3

        // New A point for next slice of spline is the 
        // on curve C point of this B-Spline
        spline[0] = spline[2];
    }

    return cTotal;
}

/****************************************************************************
 *  FUNCTION   : CloseContour
 *
 *  PURPOSE    : Adds a bezier line to close the circuit defined in pt.
 *
 *
 *  RETURNS    : number of points aded to the pt POINT array.
 ****************************************************************************/ 
UINT CloseContour( LPPOINT pt, UINT cTotal )
{
    POINT               endpt, 
                        startpt;    // definition of a line
    POINT               bezier[4];

    // connect the first and last points by a line segment
    startpt = pt[cTotal-1];
    endpt = pt[0];

    // convert a line to a bezier representation
    MakeBezierFromLine( bezier, startpt, endpt );

    // append the Bezier to the existing ones
                                // Point 0 is Point 3 of previous.
    pt[cTotal++] = bezier[1];   // Point 1
    pt[cTotal++] = bezier[2];   // Point 2
    pt[cTotal++] = bezier[3];   // Point 3

    return 3;
}

/****************************************************************************
 *  FUNCTION   : DrawT2Outline
 *
 *  PURPOSE    : Decode the GGO_NATIVE outline, create a sequence of Beziers
 *               for each contour, draw with PolyBezier.  Color and relative 
 *               positioning provided by caller. The coordinates of hDC are
 *               assumed to have MM_TEXT orientation.
 *
 *               The outline data is not scaled. To draw a glyph unhinted
 *               the caller should create the font at its EMSquare size
 *               and retrieve the outline data. Then setup a mapping mode
 *               prior to calling this function.
 *
 *  RETURNS    : none.
 ****************************************************************************/ 
void DrawT2Outline(HDC hDC, LPTTPOLYGONHEADER lpHeader, DWORD size) 
{
    WORD                i;
    UINT                cTotal = 0; // Total points in a contour.
    LPTTPOLYGONHEADER   lpStart;    // the start of the buffer
    LPTTPOLYCURVE       lpCurve;    // the current curve of a contour
    LPPOINT             pt;         // the bezier buffer
    POINTFX             ptStart;    // The starting point of a curve
    DWORD               dwMaxPts = size/size of(POINTFX); // max possible pts.
    DWORD               dwBuffSize;

    dwBuffSize = dwMaxPts *     // Maximum possible # of contour points.
                 sizeof(POINT) * // sizeof buffer element
                 3;             // Worst case multiplier of one additional point
                                // of line expanding to three points of a bezier

   lpStart = lpHeader;
   pt = (LPPOINT)malloc( dwBuffSize );

    // Loop until we have processed the entire buffer of contours.
    // The buffer may contain one or more contours that begin with
    // a TTPOLYGONHEADER. We have them all when we the end of the buffer.
    while ((DWORD)lpHeader < (DWORD)(((LPSTR)lpStart) + size) && pt != NULL)
    {
        if (lpHeader->dwType == TT_POLYGON_TYPE)
        // Draw each coutour, currently this is the only valid
        // type of contour.
        {
            // Convert the starting point. It is an on curve point.
            // All other points are continuous from the "last" 
            // point of the contour. Thus the start point the next
            // bezier is always pt[cTotal-1] - the last point of the 
            // previous bezier. See PolyBezier.
            cTotal = 1;
            pt[0].x = IntFromFixed(lpHeader->pfxStart.x);
            pt[0].y = IntFromFixed(lpHeader->pfxStart.y);

            // Get to first curve of contour - 
            // it starts at the next byte beyond header
            lpCurve = (LPTTPOLYCURVE) (lpHeader + 1);

            // Walk this contour and process each curve( or line ) segment 
            // and add it to the Beziers
            while ((DWORD)lpCurve < (DWORD)(((LPSTR)lpHeader) + lpHeader->cb))
            {
                //**********************************************
                // Format assumption:
                //   The bytes immediately preceding a POLYCURVE
                //   structure contain a valid POINTFX.
                // 
                //   If this is first curve, this points to the 
                //      pfxStart of the POLYGONHEADER.
                //   Otherwise, this points to the last point of
                //      the previous POLYCURVE.
                // 
                //   In either case, this is representative of the
                //      previous curve's last point.
                //**********************************************

                ptStart = *(LPPOINTFX)((LPSTR)lpCurve - sizeof(POINTFX));
                if (lpCurve->wType == TT_PRIM_LINE)
                {
                    // convert the line segments to Bezier segments
                    cTotal += AppendPolyLineToBezier( &pt[cTotal], ptStart, lpCurve );
                    i = lpCurve->cpfx;
                }
                else if (lpCurve->wType == TT_PRIM_QSPLINE)
                {
                    // Decode each Quadratic B-Spline segment, convert to bezier,
                    // and append to the Bezier segments
                    cTotal += AppendQuadBSplineToBezier( &pt[cTotal], ptStart, lpCurve );
                    i = lpCurve->cpfx;
                }
                else
                    // Oops! A POLYCURVE format we don't understand.
                    ; // error, error, error

            // Move on to next curve in the contour.
            lpCurve = (LPTTPOLYCURVE)&(lpCurve->apfx[i]);
            }

            // Add points to close the contour.
            // All contours are implied closed by TrueType definition.
            // Depending on the specific font and glyph being used, these
            // may not always be needed.
            if ( pt[cTotal-1].x != pt[0].x || pt[cTotal-1].y != pt[0].y )
            {
                cTotal += CloseContour( pt, cTotal );
            }

            // flip coordinates to get glyph right side up (Windows coordinates)
            // TT native coordiantes are zero originate at lower-left.
            // Windows MM_TEXT are zero originate at upper-left.
            for (i = 0; i < cTotal; i++)
                pt[i].y = 0 - pt[i].y;

            // Draw the contour
            PolyBezier( hDC, pt, cTotal );
        }
        else
            // Bad, bail, must have a bogus buffer.
            break; // error, error, error

        // Move on to next Contour.
        // Its header starts immediate after this contour
        lpHeader = (LPTTPOLYGONHEADER)(((LPSTR)lpHeader) + lpHeader->cb);
    }

    free( pt );
}
				

?????

?????? ??? ???? ?? ????????? ??? ??????? ??????? ?????? ??????:
Microsoft TrueType Specifications (http://www.microsoft.com/typography/tt/tt.htm)

????? ?????? ??? CD ????? ???? Microsoft ?????? ??? ???????.

???????

???? ???????: 243285 - ????? ??? ??????: 24/????/1428 - ??????: 1.5
????? ???
  • Microsoft Win32 ????? ????? ???????
  • Microsoft Windows XP Professional
  • the operating system: Microsoft Windows XP 64-Bit Edition
????? ??????: 
kbmt kbdswgdi2003swept kbdraw kbfont kbgdi kbhowto KB243285 KbMtar
????? ????
???: ??? ????? ??? ?????? ???????? ?????? ????? ???? ????? ?????????? ????? ?? ????????? ?????? ????. ???? ???? ?????????? ???? ?? ???????? ???????? ?????? ????????? ????? ????????? ???????? ????? ???????? ?????? ?? ?????? ??? ?? ???????? ???????? ?? ????? ??????? ?????? ??? ??????? ?????? ??. ?????? ?? ???? ??? ??????? ???????? ????? ?? ???? ????? ?????? ??? ????? ??? ????? ??????? ?? ????? ?? ?????? ??? ??? ??????? ??????? ?? ????? ????? ????? ????? ?????. ?? ????? ???? ?????????? ??????? ??? ????? ?? ??????? ?? ????? ?????? ?? ??? ????? ?? ????? ??????? ?? ???????? ?? ??? ???????. ???? ???? ?????????? ???????? ??? ????? ?????? ??????? ??????
???? ??? ????? ??????? ?????? ??????????243285

????? ???????

 

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