cpdf_setgray

Sets drawing and filling color to gray value (PHP 3 >= 3.0.8, PHP 4, PHP 5 <= 5.0.4)
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().