PDF_setcolor

(PHP 4 >= 4.0.5, PECL pdflib >= 1.0.0)

PDF_setcolor — Set fill and stroke color

说明

bool PDF_setcolor ( resource $p , string $fstype , string $colorspace , float $c1 , float $c2 , float $c3 , float $c4 )

Sets the current color space and color. 成功时返回 TRUE，或者在失败时返回 FALSE。

User Contributed Notes

cancausecancer at yahoo dot com 15-Jan-2011 01:39


Here is a quick snippet to convert CMYK to RGB. It has better precision than a lot of other solutions that also don't factor in colour profiles.



<?php



$cmyk = '10,20,100,31';

list($c, $m, $y, $k) = explode(',', $cmyk);



# Gets the rgb as floats (cast via (int) if you want int )

$r = (1 - min(($c / 100) * (1 - $k /= 100) + 1 * $k, 1)) * 255;

$g = (1 - min(($m / 100) * (1 - $k) + 1 * $k, 1)) * 255;

$b = (1 - min(($y / 100) * (1 - $k) + 1 * $k, 1)) * 255;



echo "$r $g $b\r\n";



# Converts the rgb to hex with leading 0's

$r = str_pad(dechex($r), 2, '0', STR_PAD_LEFT);

$g = str_pad(dechex($g), 2, '0', STR_PAD_LEFT);

$b = str_pad(dechex($b), 2, '0', STR_PAD_LEFT);



echo "hex: $r$g$b\r\n";



/* an example to see the colour via html

echo '<div style="width: 80px; height: 80px; background-color: #', "$r$g$b", '"></div>';

*/

?>

_meto ALT+q web.de 08-May-2004 06:03


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 01:32


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 30-Apr-2003 01:22


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 09:59


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 05:25


Bonjour,



Cette fonction est utilisable pour d?finir une couleur de police.



Hello,



I search for the way of setting colors for the font in pdf and I find this.

Hope it could help.



<?php

/**

*    set font color

*    maurice.anglebert@free.fr

*/



// path for the pdf file and string to show

$pdfFilePath = $_SERVER[DOCUMENT_ROOT]."/the_dir_of_the_file/test.pdf";

$string = "The new color of my font";



$pdf = pdf_new();

pdf_open_file($pdf, $pdfFilePath);

pdf_set_info($pdf, "Title", "Test pdf");

// A4 page

pdf_begin_page($pdf, 595, 842);



// set up of the font

$font = pdf_findfont($pdf, "Courier", "host", FALSE); 

    if (isset($font)) { 

       pdf_setfont($pdf, $font, 10) or die ("unknown font"); 

    } 



pdf_setColor($pdf, "fill", "rgb",0, 0, 1); 

// this for blue color 

// pdf_setColor($pdf, "fill", "rgb",1, 0, 0) for red



pdf_set_value($pdf, "textrendering", 0);

// show at the top of the page center

pdf_show_boxed($pdf, $string, 0, 832, 595, 10, "center", "");



// resets graphic state

pdf_initGraphics($pdf);

// end of page and pdf_object 

pdf_end_page($pdf); 

pdf_close($pdf);

pdf_delete($pdf);



// use header to get the file

header("Content-type: application/pdf");

header("Content-length: ".filesize($pdfFilePath));

header("Content-disposition: inline; filename=test.pdf");

readfile($pdfFilePath);    

?>

psychosos at gmx dot at 16-Apr-2003 07:51


If you want to change the font color you need to set type to  "fill", not "stroke" ("both" also works, of course).

steven dot gould at NO_SPAM dot stevengould dot org 21-Dec-2001 08:44


If you encounter errors of the form function 'PDF_setcolor' must not be called in 'path' scope this generally means that you've called the PDFLib functions in the wrong order. For example, the following would be *incorrect* because PDF_rect marks the beginning of the "path scope", and set_color must not be called in path scope:





<?php





// THIS CODE WILL PRODUCE AN ERROR


PDF_rect($pdf,0,0,$width,$height);


PDF_setcolor($pdf,$red,$green,$blue);


PDF_fill($pdf);


<p>The correct order of function calls is as follows:


<p>// Correct order of function calls


PDF_setcolor($pdf,$red,$green,$blue);


PDF_rect($pdf,0,0,$width,$height);


PDF_fill($pdf);





?>