image editing

translucent text

Translucent Text

Translucent text is not as simple as outlining or shadowing, but it's not particularly hard. A translucent image is just something partially invisible, or clear. This is done by drawing the image onto a buffer, editing the buffer, and then merging the buffer back onto the original image.

function imagettftexttransparent( ) [ line 2 ]

full source of translucent text [ line 1 - 19 ] | download translucent text

1	<?php
2	function imagettftexttransparent (& $im ,$size ,$angle ,$x ,$y ,& $col ,$fontfile ,$text ,$pct )
3	{
4	$im_w = imagesx ($im ); // Get the image width
5	$im_h = imagesy ($im ); // Get the image height
6	$new = imagecreate ($im_w ,$im_h ); // Create a buffer
7	imagesetpixel ($im ,$im_w -1,0,$col ); // Set a pixel down, so we can easily get the color
8	$index = imagecolorat ($im ,$im_w -1,0); // Get the color at that pixel
9	$rgb = imagecolorsforindex ($im ,$index ); // Get the index of that color
10	$r = $rgb ["red" ]; // Get the red value
11	$g = $rgb ["green" ]; // Get the green value
12	$b = $rgb ["blue" ]; // Get the blue value
13	$color = imagecolorallocate ($new ,$r ,$g ,$b ); // Allocate this color on the buffer
14	$copy = imagecopy ($new ,$im ,0,0,0,0,$im_w ,$im_h ); // Copy the old image onto the buffer
15	$text = imagettftext ($new ,$size ,$angle ,$x ,$y ,$color ,$fontfile ,$text ); // Draw the text
16	$merge = imagecopymerge ($im ,$new ,0,0,0,0,$im_w ,$im_h ,$pct ); // Copy the buffer back onto the original image
17	imagedestroy ($new ); // Destroy the buffer
18	}
19	?>

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