2024年8月12日发(作者：)

in.y = v_cur.y - v_prev.y;

out.x = v_next.x - v_cur.x;

out.y = v_next.y - v_cur.y;

angle_in = FT_Atan2( in.x, in.y );

angle_out = FT_Atan2( out.x, out.y );

angle_diff = FT_Angle_Diff( angle_in, angle_out );

scale = FT_Cos( angle_diff / 2 );

if ( scale < 0x4000L && scale > -0x4000L )

in.x = in.y = 0;

else

{

d = FT_DivFix( strength, scale );

FT_Vector_From_Polar( &in, d, angle_in + angle_diff / 2 - rotate );

}

outline->points[n].x = v_cur.x + strength + in.x;

//伀偙傟傪僐儊儞僩傾僂僩偟偨偩偗

//outline->points[n].y = v_cur.y + strength + in.y;

v_prev = v_cur;

v_cur = v_next;

}

first = last + 1;

}

return FT_Err_Ok;

}

// 垂直加粗

FT_Error Vert_FT_Outline_Embolden( FT_Outline* outline, FT_Pos strength )

{

FT_Vector* points;

FT_Vector v_prev, v_first, v_next, v_cur;

FT_Angle rotate, angle_in, angle_out;

FT_Int c, n, first;

FT_Int orientation;

if ( !outline )

return FT_Err_Invalid_Argument;

strength /= 2;

if ( strength == 0 )

return FT_Err_Ok;

orientation = FT_Outline_Get_Orientation( outline );

if ( orientation == FT_ORIENTATION_NONE )

{

if ( outline->n_contours )

return FT_Err_Invalid_Argument;

else

return FT_Err_Ok;

}

if ( orientation == FT_ORIENTATION_TRUETYPE )

rotate = -FT_ANGLE_PI2;

else

rotate = FT_ANGLE_PI2;

points = outline->points;

first = 0;

for ( c = 0; c < outline->n_contours; c++ )

{

int last = outline->contours[c];

v_first = points[first];

v_prev = points[last];

v_cur = v_first;

for ( n = first; n <= last; n++ )