imagecolorexactalpha
Description
The imagecolorexactalpha of Image for PHP get the index of the specified color + alpha.
Syntax
imagecolorexactalpha( GdImage $image, int $red, int $green, int $blue, int $alpha ): int
Parameters
image
A GdImage object, returned by one of the image creation functions, such as imagecreatetruecolor().
red
Value of red component.
green
Value of green component.
blue
Value of blue component.
alpha
A value between 0 and 127. 0 indicates completely opaque while 127 indicates completely transparent.
Return
Returns the index of the specified color+alpha in the palette of the image, or -1 if the color does not exist.
Examples
1 · return
<? $width = 100; $height = 100; $image = imagecreatetruecolor($width, $height); $red = 255; $green = 128; $blue = 0; $alpha = 64; $return = imagecolorexactalpha($image, $red, $green, $blue, $alpha); echo $return;
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Links
Related
Image
- gd_info
- getimagesize
- getimagesizefromstring
- image_type_to_extension
- image_type_to_mime_type
- imageaffine
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- imagecolorexact
- imagecolormatch
- imagecolorresolve
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- imagecolorset
- imagecolorsforindex
- imagecolorstotal
- imagecolortransparent
- imageconvolution
- imagecopy
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