excelif最多設置幾個條件多條件舉例說明
4314
2023-11-13
(PHP 5 >= 5.5.0)
imagesetinterpolation — Set the interpolation method
說明
bool imagesetinterpolation ( resource$image
[, int $method = IMG_BILINEAR_FIXED
] )
Sets the interpolation method, setting an interpolation method affects the rendering of various functions in GD, such as the imagerotate() function.
參數
image
由圖象創建函數(例如imagecreatetruecolor())返回的圖象資源。
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。
范例
Example #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 ...
?>
注釋
Changing the interpolation method affects the following functions when rendering: imageaffine() imagerotate() imagescale()
