Changing color in GD via variable?
Posted on
16th Feb 2014 07:03 pm by
admin
Hey guys, I'm new here. x)
I'm very much a noob when it comes to PHP, but I'm trying to learn as much as I can. I've been writing a script which will generate a new image after submitting some hex codes, using these hex codes to generate certain colored parts of the image. Everything works just dandy - when you first visit the page, the values in the boxes specify the original hex codes that identify the color that is being changed. So, when you put in a new value and submit it, the page refreshes and displays those new values. I store these values in variables, and so in the script that generates the image, call the hex codes that a) need to be changed and b) replace the old hex codes. Unfortunately, the only problem is that it isn't actually changing the colors.
So I'm not really sure how to use variables to obtain these old and new hex codes.
demo.php (this is the image generating script)
Code: [Select]<?
$line = imagecreatefrompng('/images/character/etw/etwmaleline.png');
$base = imagecreatefrompng('/images/character/etw/etwmalebase.png');
$base2 = imagecreatefrompng('/images/character/etw/etwmale2base.png');
$eyes = imagecreatefrompng('/images/character/etw/etwmaleeyes.png');
$statc = imagecreatefrompng('/images/character/etw/etwmalestatc.png');
//BASE hex
$width = imagesx($base);
$height = imagesy($base);
$colorToChange = $pbase;
$newbaseColor = $_GET['base'];
$c1 = sscanf($colorToChange,"%2x%2x%2x");
$c2 = sscanf($newbaseColor,"%2x%2x%2x");
$cnew = imagecolorallocate($base,$c2[0],$c2[1],$c2[2]);
for ($y=0;$y<$height;$y++) {
for ($x=0;$x<$width;$x++) {
$rgb = imagecolorat($base,$x,$y);
$r = ($rgb >> 16) & 0xFF;
$g = ($rgb >> 8) & 0xFF;
$b = $rgb & 0xFF;
if (($r==$c1[0]) && ($g==$c1[1]) && ($b==$c1[2])) {
imagesetpixel($base,$x,$y,$cnew);
}
}
}
//BASE2 hex
$width = imagesx($base2);
$height = imagesy($base2);
$colorToChange = $pbase2;
$newbase2Color = $_GET['base2'];
$c1 = sscanf($colorToChange,"%2x%2x%2x");
$c2 = sscanf($newbase2Color,"%2x%2x%2x");
$cnew = imagecolorallocate($base2,$c2[0],$c2[1],$c2[2]);
for ($y=0;$y<$height;$y++) {
for ($x=0;$x<$width;$x++) {
$rgb = imagecolorat($base2,$x,$y);
$r = ($rgb >> 16) & 0xFF;
$g = ($rgb >> 8) & 0xFF;
$b = $rgb & 0xFF;
if (($r==$c1[0]) && ($g==$c1[1]) && ($b==$c1[2])) {
imagesetpixel($base2,$x,$y,$cnew);
}
}
}
//EYES hex
$width = imagesx($eyes);
$height = imagesy($eyes);
$colorToChange = $peyes;
$neweyesColor = $_GET['eyes'];
$c1 = sscanf($colorToChange,"%2x%2x%2x");
$c2 = sscanf($neweyesColor,"%2x%2x%2x");
$cnew = imagecolorallocate($eyes,$c2[0],$c2[1],$c2[2]);
for ($y=0;$y<$height;$y++) {
for ($x=0;$x<$width;$x++) {
$rgb = imagecolorat($eyes,$x,$y);
$r = ($rgb >> 16) & 0xFF;
$g = ($rgb >> 8) & 0xFF;
$b = $rgb & 0xFF;
if (($r==$c1[0]) && ($g==$c1[1]) && ($b==$c1[2])) {
imagesetpixel($eyes,$x,$y,$cnew);
}
}
}
imagealphablending($line, 1);
imagealphablending($base, 1);
imagealphablending($base2, 1);
imagealphablending($eyes, 1);
imagealphablending($statc, 1);
$i= array($base, $eyes, $base2, $statc, $line);
$s = imagemergealpha($i);
//Merge multiple images and keep transparency
//$i is and array of the images to be merged:
// $i[1] will be overlayed over $i[0]
// $i[2] will be overlayed over that
// ...
//the function returns the resulting image ready for saving
function imagemergealpha($i) {
//create a new image
$s = imagecreatetruecolor(imagesx($i[0]),imagesy($i[1]));
//merge all images
imagealphablending($s,true);
$z = $i;
while($d = each($z)) {
imagecopy($s,$d[1],0,0,0,0,imagesx($d[1]),imagesy($d[1]));
}
//restore the transparency
imagealphablending($s,false);
$w = imagesx($s);
$h = imagesy($s);
for($x=0;$x<$w;$x++) {
for($y=0;$y<$h;$y++) {
$c = imagecolorat($s,$x,$y);
$c = imagecolorsforindex($s,$c);
$z = $i;
$t = 0;
while($d = each($z)) {
$ta = imagecolorat($d[1],$x,$y);
$ta = imagecolorsforindex($d[1],$ta);
$t += 127-$ta['alpha'];
}
$t = ($t > 127) ? 127 : $t;
$t = 127-$t;
$c = imagecolorallocatealpha($s,$c['red'],$c['green'],$c['blue'],$t);
imagesetpixel($s,$x,$y,$c);
}
}
imagesavealpha($s,true);
return $s;
}
header('Content-type: image/png');
imagepng($s);
imagedestroy($s);
error_reporting(E_ALL);
?>
hextest2.php
Code: [Select]<?php
include_once('test2.php');
$pbase = 'c8c8c8';
$pbase2 = 'c8c8c8';
$peyes = 'c8c8c8';
if (!isset($_GET['preview']) && !isset($_GET['submit']))
echo "thou hast naught yet submat thee hex codes!";
elseif (isset($_GET['preview']) && !isset($_GET['submit']))
include_once('test3.php');
else (
include_once('test4.php'));
?>
<html>
<head>
<title>Soundtrack Howl!</title>
<link rel="stylesheet" type="text/css" />
</head>
<body style="background-color: #d8d8d8;"> <center>
<table width="700px"> <tr> <td width="400px">
<img src="demo.php"/>
</td> </tr>
<tr> <td width="300px">
<form action="<?=$_SERVER['PHP_SELF']?>" method="get">
<b>Base:</b> # <input type="text" name="base" value="<? echo($pbase); ?>" /> <br />
<b>2nd Base:</b> # <input type="text" name="base2" value="<? echo($pbase2); ?>" /> <br />
<b>Eyes:</b> # <input type="text" name="eyes" value="<? echo($peyes); ?>" /> <br />
<input type="submit" name="preview" value="Preview Character!" /> <br /> <br />
<input type="submit" name="submit" value="Make Your New Character!!" />
</form>
</td> </tr> </table>
</center>
</body>
</html>
test3.php
Code: [Select]<?php
include_once('./includes/general.php');
if ($_GET['base']=='' or $_GET['base2']=='' or $_GET['eyes']==''){
echo "You haven't filled them all out! <br />";
}
if (strlen($_GET['base'])<'6' || strlen($_GET['base2'])<'6' || strlen($_GET['eyes'])<'6'){
echo "The hex codes are incomplete! <br />";
}
else {
$pbase = $_GET['base'];
$pbase2 = $_GET['base2'];
$peyes = $_GET['eyes'];
}
?>
test4.php
Code: [Select]<?php
include_once('./includes/general.php');
if ($_GET['base']=='' or $_GET['base2']=='' or $_GET['eyes']==''){
echo "You haven't filled them all out!";
}
else {
$nbase = $_GET['base'];
$nbase2 = $_GET['base2'];
$neyes = $_GET['eyes'];
$sql = mysql_query("INSERT INTO `character` (`base`, `base2`, `eyes`)
VALUES ('$nbase', '$nbase2', '$neyes') ") or die("Thou has submat thee hex codes! There be errors abreast!<br />".mysql_error());
header('Location: complete.php');
}
?>
And /includes/general.php is just the file that connects to the database.
I'm SO sorry, I know it's a ton of stuff to read, but I want to make sure the problem isn't just in demo.php. Also, I'm aware that my script(s) are messy and may have some unnecessary coding, so just ignore that unless it has anything to do with my problem XD To clarify, I did not actually literally write the image generating script all by myself. I used php.net and googled some stuff to reference.
Thanks
No comments posted yet
Your Answer:
Login to answer
146 18
Other forums
convert static html data into dynamic
hi all
i need to convert a website which has static above 2000 articles into dynamic and add
is this the proper use of mysql_real_escape_string() to prevent sql injections?
i was wondering is this the proper use of mysql_real_escape_string() to prevent sql injections? any
disabling a button server-side then re-enabling client-side breaks button postback
I have a tabbed container and a button (not in the container) on a page. If the first tab is selecte
Displaying a record from mysql in a simple swf file
Hi,
I have a mysql database containing information I would like to display in my swf.
Update data to upper case in parent/child tables
Hi Gurus!
In production we have a product table and which is being reference by many tabl
need help in update query
hi
i have a dynamic form. i need help in how can i use update query when values from dynamic for
Calling variables
I want to call this to my website but it doesn't display what I want it to,
Code: <h5&
Probably a simple error...
I'm getting the error -- Parse error: syntax error, unexpected '{' in /home/content/c/s/t/csteffen24
Rounding a number queried from a database
I know that to display a rounded number you just do echo "round($number)";. But how would
Help! refer to a friend script with captcha code
Hi guys, I am posting on here in desperate need for some help with an ongoing search I have been doi