pdf_setgray_fill
Description
bool pdf_setgray_fill ( resource pdfdoc, float gray)Set the current fill color to a gray value between 0 and 1 inclusive. 如果成功则返回 TRUE，失败则返回 FALSE。
注: PDFlib V4.0: Deprecated, use pdf_setcolor() instead.
| pdf_setgray_fillDescriptionbool pdf_setgray_fill ( resource pdfdoc, float gray)Set the current fill color to a gray value between 0 and 1 inclusive. 如果成功则返回 TRUE，失败则返回 FALSE。
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