ps_setgray
(no version information, might be only in CVS)
ps_setgray -- Sets gray value
说明
bool
ps_setgray ( resource psdoc, float gray )
Sets the gray value for all following drawing operations.
参数
- psdoc
- gray
The value must be between 0 (white) and 1 (black).
返回值
如果成功则返回 TRUE，失败则返回 FALSE。