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PDF_setcolor

_meto ALT+q web.de
08-May-2004 09:03


Damn, this took me some real long time! Maybe it's helpfull for those who even have no idea of color-Schemes like me ;)



If u want to generate PDF's for Print Offices u need to set all the colors in CMYK.



Here is a Function that will convert RGB to CMYK



<?

function hex2rgb($hex) {

  $color = str_replace('#','',$hex);

  $rgb = array('r' => hexdec(substr($color,0,2)),

               'g' => hexdec(substr($color,2,2)),

               'b' => hexdec(substr($color,4,2)));

  return $rgb;

}



function rgb2cmyk($var1,$g=0,$b=0) {

   if(is_array($var1)) {

      $r = $var1['r'];

      $g = $var1['g'];

      $b = $var1['b'];

   }

   else $r=$var1;

   $cyan    = 255 - $r;

   $magenta = 255 - $g;

   $yellow  = 255 - $b;

   $black   = min($cyan, $magenta, $yellow);

   $cyan    = @(($cyan    - $black) / (255 - $black)) * 255;

   $magenta = @(($magenta - $black) / (255 - $black)) * 255;

   $yellow  = @(($yellow  - $black) / (255 - $black)) * 255;

   return array('c' => $cyan / 255,

                'm' => $magenta / 255,

                'y' => $yellow / 255,

                'k' => $black / 255);

}



$color=rgb2cmyk(hex2rgb('#FF0000')); 

pdf_setcolor($pdf, "both", "cmyk", $color['c'], $color['m'], $color['y'], $color['k']);

?>



U can call it with parameters (r,g,b) or just an array(r,g,b) that contains these values.



Hope it works correct. All testing was fine.

enyo vel cora
13-Jan-2004 04:32


This seems a little less complicated:



this is the color you want to use : 'FF11AA'



<?php

pdf_setcolor ($pdf, 'both', 0xFF / 255, 0x11 / 255, 0xAA / 255);

?>

php at perfectweb dotcom
29-Apr-2003 04:22


Here's a better implementation for setting HTML hexadecimal colors:



function pdf_setcolor_hex($hexcolor, $type = '')

{

    global $pdf;     ## match this to your pdf resource handle

       $color['r'] = hexdec(substr($hexcolor, 0, 2))/255; 

       $color['g'] = hexdec(substr($hexcolor, 2, 2))/255; 

       $color['b'] = hexdec(substr($hexcolor, 4, 2))/255;

       if ($type != 'fill' && $type != 'stroke')  $type = 'both';

       pdf_setcolor($pdf, $type, 'rgb', $color['r'], $color['g'], $color['b']);

}



Sample usage:

pdf_setcolor_hex('FFFFFF', 'fill');



-Derek

php at perfectweb dotcom
29-Apr-2003 12:59


Here's a function for converting HTML hexadecimal colors to RGB decimals suitable for this function:



$color_hex = "FF0000";       ## whatever hex color you want

$color = convert_hexcolor_rgbdec($color_hex);

pdf_setcolor($pdf, 'fill', 'rgb', $color['r'], $color['g'], $color['b']);



function convert_hexcolor_rgbdec($color_hex)

{

   $color['r'] = hexdec(substr($color_hex, 0, 2))/255; 

   $color['g'] = hexdec(substr($color_hex, 2, 2))/255; 

   $color['b'] = hexdec(substr($color_hex, 4, 2))/255;

   return $color;

}



-Derek

maurice dot anglebert at free dot fr
28-Apr-2003 08:25


Bonjour,



Cette fonction est utilisable pour d

PDF_setcolor

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