The CairoFilter class
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简介
A CairoFilter is used to indicate what filtering should be applied when reading pixel values from patterns. See CairoPattern::setSource() or cairo_pattern_set_source() for indicating the desired filter to be used with a particular pattern.
类摘要
CairoFilter
{
/* 常量 */
const
integer
FAST
= 0
;
const
integer
GOOD
= 1
;
const
integer
BEST
= 2
;
const
integer
NEAREST
= 3
;
const
integer
BILINEAR
= 4
;
const
integer
GAUSSIAN
= 5
;
}
预定义常量
CairoFilter::FAST
CairoFilter::FAST
A high-performance filter, with quality similar to CairoFilter::NEAREST
CairoFilter::GOOD
A reasonable-performance filter, with quality similar to CairoFilter::BILINEAR
CairoFilter::BEST
The highest-quality available, performance may not be suitable for interactive use.
CairoFilter::NEAREST
Nearest-neighbor filtering
CairoFilter::BILINEAR
Linear interpolation in two dimensions
CairoFilter::GAUSSIAN
This filter value is currently unimplemented, and should not be used in current code.
User Contributed Notes
There are no user contributed notes for this page.官方地址：https://www.php.net/manual/en/class.cairofilter.php