<script src="/t5/forums/postpage/board-id/2170/submitted/pdf.js" type="text/javascript"></script>
<script src="/t5/forums/postpage/board-id/2170/submitted/web.js" type="text/javascript"></script>
int imaqDrawTextOnImage(Image* dest, const Image* source, Point coord, const char* text, const DrawTextOptions* options, int* fontNameUsed);
求解:上面这个函数怎么还有 image*source 这一项参数?这一项是怎么使用的?与dest一样,指向同一图片?