(PHP 5 >= 5.5.0, PHP 7, PHP 8)
imagesetinterpolation — Set the interpolation method
Sets the interpolation method, setting an interpolation method affects the rendering of various functions in GD, such as the imagerotate() function.
imageEin GdImage-Objekt, das von einer der Funktionen zur Bilderzeugung, z. B. imagecreatetruecolor(), zurückgegeben wurde.
methodThe 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. | Version | Beschreibung |
|---|---|
| 8.0.0 | image erwartet nun eine GdImage-Instanz; vorher wurde eine gültige gd-Ressource erwartet. |
Beispiel #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 ...
?>Changing the interpolation method affects the following functions when rendering: