214 lines
6.5 KiB
PHP
214 lines
6.5 KiB
PHP
<?php
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/**
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* ClickHeat : crée sur disque et renvoie le logo PNG 80x15 / creates on disk and returns the PNG 80x15 logo
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*
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* @author Yvan Taviaud - Dugwood - www.dugwood.com
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* @since 31/10/2006
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*/
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define('CLICKHEAT_GREY_COLOR', 255);
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define('CLICKHEAT_LOW_COLOR', 0);
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define('CLICKHEAT_HIGH_COLOR', 255);
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/* Image creation */
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$img = imagecreatetruecolor(180, 45);
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$white = imagecolorallocate($img, 255, 255, 255);
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$blue = imagecolorallocate($img, 70, 70, 255);
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$red = imagecolorallocate($img, 255, 70, 70);
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$black = imagecolorallocate($img, 0, 0, 0);
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$shadow = imagecolorallocate($img, 200, 200, 255);
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imagefill($img, 0, 0, $white);
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/**
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* Colors creation :
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* grey => deep blue (rgB) => light blue (rGB) => green (rGb) => yellow (RGb) => red (Rgb)
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* 0 $colorLevels[0] $colorLevels[1] $colorLevels[2] $colorLevels[3] 128
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*/
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$colorLevels = array(0, 40, 45, 70, 100);
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$colors = array();
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for ($i = 0; $i < 128; $i++)
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{
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/* Red */
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if ($i < $colorLevels[0])
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{
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$colors[$i][0] = CLICKHEAT_GREY_COLOR + (CLICKHEAT_LOW_COLOR - CLICKHEAT_GREY_COLOR) * $i / $colorLevels[0];
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}
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elseif ($i < $colorLevels[2])
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{
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$colors[$i][0] = CLICKHEAT_LOW_COLOR;
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}
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elseif ($i < $colorLevels[3])
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{
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$colors[$i][0] = CLICKHEAT_LOW_COLOR + (CLICKHEAT_HIGH_COLOR - CLICKHEAT_LOW_COLOR) * ($i - $colorLevels[2]) / ($colorLevels[3] - $colorLevels[2]);
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}
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else
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{
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$colors[$i][0] = CLICKHEAT_HIGH_COLOR;
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}
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/* Green */
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if ($i < $colorLevels[0])
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{
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$colors[$i][1] = CLICKHEAT_GREY_COLOR + (CLICKHEAT_LOW_COLOR - CLICKHEAT_GREY_COLOR) * $i / $colorLevels[0];
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}
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elseif ($i < $colorLevels[1])
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{
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$colors[$i][1] = CLICKHEAT_LOW_COLOR + (CLICKHEAT_HIGH_COLOR - CLICKHEAT_LOW_COLOR) * ($i - $colorLevels[0]) / ($colorLevels[1] - $colorLevels[0]);
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}
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elseif ($i < $colorLevels[3])
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{
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$colors[$i][1] = CLICKHEAT_HIGH_COLOR;
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}
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else
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{
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$colors[$i][1] = CLICKHEAT_HIGH_COLOR - (CLICKHEAT_HIGH_COLOR - CLICKHEAT_LOW_COLOR) * ($i - $colorLevels[3]) / (127 - $colorLevels[3]);
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}
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/* Blue */
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if ($i < $colorLevels[0])
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{
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$colors[$i][2] = CLICKHEAT_GREY_COLOR + (CLICKHEAT_HIGH_COLOR - CLICKHEAT_GREY_COLOR) * $i / $colorLevels[0];
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}
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elseif ($i < $colorLevels[1])
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{
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$colors[$i][2] = CLICKHEAT_HIGH_COLOR;
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}
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elseif ($i < $colorLevels[2])
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{
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$colors[$i][2] = CLICKHEAT_HIGH_COLOR - (CLICKHEAT_HIGH_COLOR - CLICKHEAT_LOW_COLOR) * ($i - $colorLevels[1]) / ($colorLevels[2] - $colorLevels[1]);
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}
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else
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{
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$colors[$i][2] = CLICKHEAT_LOW_COLOR;
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}
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}
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$max = 12;
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$pixels = array(
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' *** ',
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' ***** ',
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' ***** ',
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' ****** ',
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' ****** ',
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' ******* ',
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' ******* ',
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' ******* ',
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' ******** ',
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' ********* ',
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' ********** ',
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' *********** ',
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' ************* ',
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' ************** ',
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' **************** ',
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' ****************** ',
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' ******************** ',
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'*********************** ',
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'************************ ',
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'************************* ',
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'************************* ',
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'**************************',
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'**************************',
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' *************************',
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' *************************',
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' ************************',
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' ************************',
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' ***********************',
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' **********************',
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' ******************** ',
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' ******************* ',
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' ****************** ',
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' *************** ',
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' ************** ',
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' *********** ',
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' ********* ',
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' ****** ',
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' ***** ',
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' **** ',
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' *** ',
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' ** ',
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' * ');
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$mx = strlen($pixels[0]);
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$my = count($pixels);
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$blur = imagecreatetruecolor($mx + 2, $my + 2);
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$white = imagecolorallocate($blur, 255, 255, 255);
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imagefill($blur, 0, 0, $white);
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for ($x = 0; $x < $mx; $x++)
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{
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for ($y = 0; $y < $my; $y++)
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{
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if ($pixels[$y][$x] === '*')
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{
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imagesetpixel($blur, $x + 1, $y + 1, $black);
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}
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}
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}
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$previous = $white;
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for ($i = 0; $i <= $max; $i++)
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{
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$color = imagecolorallocate($blur, $colors[ceil($i * 127 / $max)][0], $colors[ceil($i * 127 / $max)][1], $colors[ceil($i * 127 / $max)][2]);
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for ($x = 1; $x < $mx + 1; $x++)
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{
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for ($y = 1; $y < $my + 1; $y++)
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{
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if (imagecolorat($blur, $x, $y) === $black)
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{
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if ($i === $max || imagecolorat($blur, $x + 1, $y) === $previous || imagecolorat($blur, $x - 1, $y) === $previous || imagecolorat($blur, $x, $y + 1) === $previous || imagecolorat($blur, $x, $y - 1) === $previous)
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{
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imagesetpixel($blur, $x, $y, $color);
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}
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}
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}
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}
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$previous = $color;
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}
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$color = array();
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$level = 1;
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for ($x = 1; $x < $mx + 1; $x++)
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{
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for ($y = 1; $y < $my + 1; $y++)
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{
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$color[0] = imagecolorsforindex($blur, imagecolorat($blur, $x, $y));
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if ($color[0]['red'] + $color[0]['green'] + $color[0]['blue'] === 765)
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{
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$color[1] = imagecolorsforindex($blur, imagecolorat($blur, $x + 1, $y));
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$color[2] = imagecolorsforindex($blur, imagecolorat($blur, $x - 1, $y));
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$color[3] = imagecolorsforindex($blur, imagecolorat($blur, $x, $y + 1));
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$color[4] = imagecolorsforindex($blur, imagecolorat($blur, $x, $y - 1));
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$col = imagecolorallocate($img, ceil(($level * $color[0]['red'] + $color[1]['red'] + $color[2]['red'] + $color[3]['red'] + $color[4]['red']) / ($level + 4)), ceil(($level * $color[0]['green'] + $color[1]['green'] + $color[2]['green'] + $color[3]['green'] + $color[4]['green']) / ($level + 4)), ceil(($level * $color[0]['blue'] + $color[1]['blue'] + $color[2]['blue'] + $color[3]['blue'] + $color[4]['blue']) / ($level + 4)));
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}
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else
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{
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$col = imagecolorallocate($img, $color[0]['red'], $color[0]['green'], $color[0]['blue']);
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}
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imagesetpixel($img, $x, $y, $col);
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}
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}
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imagedestroy($blur);
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$string = 'ClickHeat';
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$x = 28;
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$font = '/home/yvan/.ies4linux/ie5/drive_c/windows/fonts/verdana.ttf';
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$size = 25;
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for ($i = 0, $max = strlen($string); $i < $max; $i++)
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{
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$info = imagettfbbox($size, 0, $font, $string[$i]);
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if (strtolower($string[$i]) === 'h')
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{
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$font = '/home/yvan/.ies4linux/ie5/drive_c/windows/fonts/verdanab.ttf';
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}
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imagettftext($img, $size, 0, $x + 1, 36, $shadow, $font, $string[$i]);
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imagettftext($img, $size, 0, $x, 35, $blue, $font, $string[$i]);
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$x += $info[2] - $info[0] + 3;
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if (strtolower($string[$i]) === 'c' || strtolower($string[$i]) === 'k')
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{
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$x -= 2;
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}
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if (strtolower($string[$i]) === 'h')
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{
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$x += 4;
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}
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}
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header('Content-Type: image/png');
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imagepng($img, './images/logo.big.png');
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imagepng($img);
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imagedestroy($img);
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