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Top Forums UNIX for Advanced & Expert Users Installing GD Perl graphics modules Post 302285820 by andrewduncan on Monday 9th of February 2009 05:37:47 PM
Old 02-09-2009
Continuing

I think I need to install libgd next, is that correct?
 

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IMAGELAYEREFFECT(3)							 1						       IMAGELAYEREFFECT(3)

imagelayereffect - Set the alpha blending flag to use the bundled libgd layering effects

SYNOPSIS
bool imagelayereffect (resource $image, int $effect) DESCRIPTION
Set the alpha blending flag to use the bundled libgd layering effects. PARAMETERS
o $ image -An image resource, returned by one of the image creation functions, such as imagecreatetruecolor(3). o $effect - One of the following constants: o IMG_EFFECT_REPLACE - Use pixel replacement (equivalent of passing TRUE to imagealphablending(3)) o IMG_EFFECT_ALPHABLEND - Use normal pixel blending (equivalent of passing FALSE to imagealphablending(3)) o IMG_EFFECT_NORMAL - Same as IMG_EFFECT_ALPHABLEND. o IMG_EFFECT_OVERLAY - Overlay has the effect that black background pixels will remain black, white background pixels will remain white, but grey background pixels will take the colour of the foreground pixel. RETURN VALUES
Returns TRUE on success or FALSE on failure. EXAMPLES
Example #1 imagelayereffect(3) example <?php // Setup an image $im = imagecreatetruecolor(100, 100); // Set a background imagefilledrectangle($im, 0, 0, 100, 100, imagecolorallocate($im, 220, 220, 220)); // Apply the overlay alpha blending flag imagelayereffect($im, IMG_EFFECT_OVERLAY); // Draw two grey ellipses imagefilledellipse($im, 50, 50, 40, 40, imagecolorallocate($im, 100, 255, 100)); imagefilledellipse($im, 50, 50, 50, 80, imagecolorallocate($im, 100, 100, 255)); imagefilledellipse($im, 50, 50, 80, 50, imagecolorallocate($im, 255, 100, 100)); // Output header('Content-type: image/png'); imagepng($im); imagedestroy($im); ?> The above example will output something similar to:[NOT DISPLAYABLE MEDIA]Output of example : imagelayereffect() NOTES
Note This function requires GD 2.0.1 or later (2.0.28 or later is recommended). PHP Documentation Group IMAGELAYEREFFECT(3)
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