我用MagicWand在图片上打印文字
$drawing_wand=NewDrawingWand();
DrawSetTextDecoration($drawing_wand,MW_UnderlineDecoration);
DrawSetFont($drawing_wand,"fonts/FZ05.ttf");
DrawSetFontSize($drawing_wand,20);
DrawSetGravity($drawing_wand,MW_SouthWestGravity);
$pixel_wand=NewPixelWand();

PixelSetColor($pixel_wand,"rgb(255,255,0)");
DrawSetFillColor($drawing_wand,$pixel_wand);
MagickAnnotateImage($rw,$drawing_wand,100,30,0,"母亲节快乐");
可以打印横向的文字,我想打印竖向的,怎么做啊??????