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Последние активные темы форума |
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imagefilter
(PHP 5) imagefilter --
Applies a filter to an image
Descriptionbool 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 1. imagefilter() grayscale example
<?php
$im
=
imagecreatefrompng
(
'dave.png'
);
if (
$im
&&
imagefilter
(
$im
,
IMG_FILTER_GRAYSCALE
)) {
echo
'Image converted to grayscale.'
;
imagepng
(
$im
,
'dave.png'
);
} else {
echo
'Conversion to grayscale failed.'
;
}
imagedestroy
(
$im
);
?>
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Пример 2. imagefilter() brightness example
<?php
$im
=
imagecreatefrompng
(
'sean.png'
);
if (
$im
&&
imagefilter
(
$im
,
IMG_FILTER_BRIGHTNESS
,
20
)) {
echo
'Image brightness changed.'
;
imagepng
(
$im
,
'sean.png'
);
} else {
echo
'Image brightness change failed.'
;
}
imagedestroy
(
$im
);
?>
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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
);
?>
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