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Merge pull request #5859 from rxu/ticket/16360

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[ticket/16360] Fix allocating color for GD 3D image CAPTCHA
This commit is contained in:
Marc Alexander
2020-02-11 16:49:11 +01:00
parent 3d4af04927 b5993fc2a3
commit 10c038d8f3
1 changed files with 6 additions and 1 deletions
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7
phpBB/phpbb/captcha/gd_wave.php
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@@ -100,7 +100,12 @@ class gd_wave
{ {
$coeff1 = ($i + 12) / 45; $coeff1 = ($i + 12) / 45;
$coeff2 = 1 - $coeff1; $coeff2 = 1 - $coeff1;
$colors[$i] = imagecolorallocate($img, ($coeff2 * $maxr) + ($coeff1 * $minr), ($coeff2 * $maxg) + ($coeff1 * $ming), ($coeff2 * $maxb) + ($coeff1 * $minb));
$red = ($coeff2 * $maxr) + ($coeff1 * $minr);
$green = ($coeff2 * $maxg) + ($coeff1 * $ming);
$blue = ($coeff2 * $maxb) + ($coeff1 * $minb);
$colors[$i] = imagecolorallocate($img, min([255, (int) $red]), min([255, (int) $green]), min([255, (int) $blue]));
} }
// $img_buffer is the last row of 3-space positions (converted to img-space), cached // $img_buffer is the last row of 3-space positions (converted to img-space), cached