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imagecolorexactalpha

imagecolorexactalpha

Get the index of the specified color + alpha

int **imagecolorexactalpha** GdImage $image int $red int $green int $blue int $alpha

Returns the index of the specified color+alpha in the palette of the image.

The colors parameters are integers between 0 and 255 or hexadecimals between 0x00 and 0xFF. redgd.value.red

greengd.value.green

bluegd.value.blue

alpha A value between and . indicates completely opaque while indicates completely transparent. 0``127``0``127

Returns the index of the specified color+alpha in the palette of the image, or -1 if the color does not exist in the image's palette.

Voorbeeld: Get colors from the GD logo

<?php

// Setup an image
$im = imagecreatefrompng('./gdlogo.png');

$colors   = Array();
$colors[] = imagecolorexactalpha($im, 255, 0, 0, 0);
$colors[] = imagecolorexactalpha($im, 0, 0, 0, 127);
$colors[] = imagecolorexactalpha($im, 255, 255, 255, 55);
$colors[] = imagecolorexactalpha($im, 100, 255, 52, 20);

print_r($colors);
?>

Array
(
    [0] => 16711680
    [1] => 2130706432
    [2] => 939524095
    [3] => 342163252
)

imagecolorclosestalpha

Vorige ← imagecolorexact Volgende imagecolormatch →

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