imagecolortransparent

Supported Versions: PHP 4, PHP 5, PHP 7, PHP 8

Define a color as transparent

imagecolortransparent(GdImage $image, ?int $color = null): int

Intervention/image

        imagefill($resource, 0, 0, $matte);

        imagecolortransparent($resource, $matte);

        imagecopy($resource, $image->getCore(), 0, 0, 0, 0, $size->width, $size->height);

src/Intervention/Image/Gd/Commands/LimitColorsCommand.php

Intervention/image

        $resource = $image->getCore();

        $transIndex = imagecolortransparent($resource);

        if ($transIndex != -1) {

            $rgba = imagecolorsforindex($modified, $transIndex);

src/Intervention/Image/Gd/Commands/ResizeCommand.php

Intervention/image

            $rgba = imagecolorsforindex($modified, $transIndex);

            $transColor = imagecolorallocatealpha($modified, $rgba['red'], $rgba['green'], $rgba['blue'], 127);

            imagefill($modified, 0, 0, $transColor);

            imagecolortransparent($modified, $transColor);

        } else {

            imagealphablending($modified, false);

            imagesavealpha($modified, true);

src/Intervention/Image/Gd/Commands/ResizeCommand.php

Intervention/image

        imagealphablending($canvas, false);

        $transparent = imagecolorallocatealpha($canvas, 255, 255, 255, 127);

        imagefilledrectangle($canvas, 0, 0, $width, $height, $transparent);

        imagecolortransparent($canvas, $transparent);

        imagealphablending($canvas, true);

src/Intervention/Image/Gd/Decoder.php