imagesetinterpolation
(PHP 5 >= 5.5.0, PHP 7, PHP 8)
imagesetinterpolation — Set the interpolation method
說明
Sets the interpolation method, setting an interpolation method affects the rendering of various functions in GD, such as the imagerotate() function.
參數
-
image -
由圖像建立函式(例如imagecreatetruecolor())返回的 GdImage 對象。
-
method -
The interpolation method, which can be one of the following:
-
IMG_BELL: Bell filter. -
IMG_BESSEL: Bessel filter. -
IMG_BICUBIC: Bicubic interpolation. -
IMG_BICUBIC_FIXED: Fixed point implementation of the bicubic interpolation. -
IMG_BILINEAR_FIXED: Fixed point implementation of the bilinear interpolation (default (also on image creation)). -
IMG_BLACKMAN: Blackman window function. -
IMG_BOX: Box blur filter. -
IMG_BSPLINE: Spline interpolation. -
IMG_CATMULLROM: Cubic Hermite spline interpolation. -
IMG_GAUSSIAN: Gaussian function. -
IMG_GENERALIZED_CUBIC: Generalized cubic spline fractal interpolation. -
IMG_HERMITE: Hermite interpolation. -
IMG_HAMMING: Hamming filter. -
IMG_HANNING: Hanning filter. -
IMG_MITCHELL: Mitchell filter. -
IMG_POWER: Power interpolation. -
IMG_QUADRATIC: Inverse quadratic interpolation. -
IMG_SINC: Sinc function. -
IMG_NEAREST_NEIGHBOUR: Nearest neighbour interpolation. -
IMG_WEIGHTED4: Weighting filter. -
IMG_TRIANGLE: Triangle interpolation.
-
返回值
成功時返回 true， 或者在失敗時返回 false。
更新日誌
| 版本 | 說明 |
|---|---|
| 8.0.0 |
image expects a GdImage
instance now; previously, a resource was expected.
|
範例
示例 #1 imagesetinterpolation() example
<?php
// Load an image
$im = imagecreate(500, 500);
// By default interpolation is IMG_BILINEAR_FIXED, switch
// to use the 'Mitchell' filter:
imagesetinterpolation($im, IMG_MITCHELL);
// Continue to work with $im ...
?>
註釋
Changing the interpolation method affects the following functions when rendering:
參見
- imagegetinterpolation() - Get the interpolation method