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cpdf_setgray
(PHP 3 >= 3.0.8, PHP 4, PECL)
cpdf_setgray -- Sets drawing and filling color to gray value
Description
bool
cpdf_setgray ( int pdf_document, float gray_value )
The cpdf_setgray() function sets the current
drawing and filling color to the given gray value. 如果成功则返回 TRUE，失败则返回 FALSE。
See also cpdf_setrgbcolor_stroke() and
cpdf_setrgbcolor_fill().