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<?php
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namespace Del\Image\Strategy;
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class AbstractTransparentImage
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{
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/**
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* @param resource $newImage
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* @param resource $image
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* @param int $index
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*/
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protected function prepWithExistingIndex($newImage, $image, $index)
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{
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// Get the array of RGB vals for the transparency index
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$transparentColor = imagecolorsforindex($image, $index);
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// Now allocate the color
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$transparency = imagecolorallocate($newImage, $transparentColor['red'], $transparentColor['green'], $transparentColor['blue']);
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// Fill the background with the color
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imagefill($newImage, 0, 0, $transparency);
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// And set that color as the transparent one
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imagecolortransparent($newImage, $transparency);
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}
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/**
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* @param $resource
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*/
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protected function prepTransparentPng($resource)
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{
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// Set blending mode as false
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imagealphablending($resource, false);
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// Tell it we want to save alpha channel info
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imagesavealpha($resource, true);
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// Set the transparent color
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$color = imagecolorallocatealpha($resource, 0, 0, 0, 127);
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// Fill the image with nothingness
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imagefill($resource, 0, 0, $color);
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}
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/**
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* @param resource $image
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* @return int
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*/
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protected function getTransparencyIndex($image)
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{
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return imagecolortransparent($image);
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}
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} |
delboy1978uk /
image
