Функции PHP »»» Графические функции imagefilter (PHP 5) imagefilter --
Applies a filter to an image
Описаниеbool imagefilter ( resource src_im, int filtertype [, int arg1 [, int arg2 [, int arg3]]] )
imagefilter() applies the filter
filtertype to the image, using
arg1, arg2 and
arg3 where necessary.
filtertype can be one of the following:
IMG_FILTER_NEGATE: Reverses all colors of
the image.
IMG_FILTER_GRAYSCALE: Converts the image into
grayscale.
IMG_FILTER_BRIGHTNESS: Changes the brightness
of the image. Use arg1 to set the level of
brightness.
IMG_FILTER_CONTRAST: Changes the contrast of
the image. Use arg1 to set the level of
contrast.
IMG_FILTER_COLORIZE: Like
IMG_FILTER_GRAYSCALE, except you can specify the
color. Use arg1, arg2 and
arg3 in the form of
red, blue,
green. The range for each color is 0 to 255.
IMG_FILTER_EDGEDETECT: Uses edge detection to
highlight the edges in the image.
IMG_FILTER_EMBOSS: Embosses the image.
IMG_FILTER_GAUSSIAN_BLUR: Blurs the image using
the Gaussian method.
IMG_FILTER_SELECTIVE_BLUR: Blurs the image.
IMG_FILTER_MEAN_REMOVAL: Uses mean removal to
achieve a "sketchy" effect.
IMG_FILTER_SMOOTH: Makes the image smoother.
Use arg1 to set the level of smoothness.
Замечание: Эта функция доступна только в том
случае, если PHP был скомпилирован со встроенной библиотекой GD.
Возвращает TRUE в случае успешного завершения или FALSE в случае возникновения ошибки.
Пример 3. imagefilter() colorize example
<?php $im = imagecreatefrompng('philip.png');
/* R, G, B, so 0, 255, 0 is green */ if ($im && imagefilter($im, IMG_FILTER_COLORIZE, 0, 255, 0)) { echo 'Image successfully shaded green.'; imagepng($im, 'philip.png'); } else { echo 'Green shading failed.'; }
imagedestroy($im); ?>
|
|
|