bool cpdf_curveto ( int pdf_document, float x1, float y1, float x2, float y2, float x3, float y3 [, int mode])
The cpdf_curveto() function draws a Bezier curve
from the current point to the point
(x3, y3) using
(x1, y1) and
(x2, y2) as control
points. 如果成功则返回 TRUE，失败则返回 FALSE。
cpdf_continue_text
