imagesetstyle

(PHP 4 >= 4.0.6, PHP 5)

imagesetstyle — Set the style for line drawing

Beschreibung

bool imagesetstyle ( resource $image , array $style )

imagesetstyle() sets the style to be used by all line drawing functions (such as imageline() and imagepolygon()) when drawing with the special color IMG_COLOR_STYLED or lines of images with color IMG_COLOR_STYLEDBRUSHED.

Parameter-Liste

image: Eine von den verschiedenen Erzeugungsfunktionen wie imagecreatetruecolor() gelieferte Grafikressource.
style: An array of pixel colors. You can use the IMG_COLOR_TRANSPARENT constant to add a transparent pixel.

Rückgabewerte

Gibt bei Erfolg TRUE zurück. Im Fehlerfall wird FALSE zurückgegeben.

Beispiele

Following example script draws a dashed line from upper left to lower right corner of the canvas:

Beispiel #1 imagesetstyle() example


<?php
header("Content-type: image/jpeg");
$im  = imagecreatetruecolor(100, 100);
$w   = imagecolorallocate($im, 255, 255, 255);
$red = imagecolorallocate($im, 255, 0, 0);

/* Draw a dashed line, 5 red pixels, 5 white pixels */
$style = array($red, $red, $red, $red, $red, $w, $w, $w, $w, $w);
imagesetstyle($im, $style);
imageline($im, 0, 0, 100, 100, IMG_COLOR_STYLED);

/* Draw a line of happy faces using imagesetbrush() with imagesetstyle */
$style = array($w, $w, $w, $w, $w, $w, $w, $w, $w, $w, $w, $w, $red);
imagesetstyle($im, $style);

$brush = imagecreatefrompng("http://www.libpng.org/pub/png/images/smile.happy.png");
$w2 = imagecolorallocate($brush, 255, 255, 255);
imagecolortransparent($brush, $w2);
imagesetbrush($im, $brush);
imageline($im, 100, 0, 0, 100, IMG_COLOR_STYLEDBRUSHED);

imagejpeg($im);
imagedestroy($im);
?>

Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

Siehe auch

imagesetbrush() - Set the brush image for line drawing
imageline() - Zeichnen einer Linie

6 BenutzerBeiträge:
- Beiträge aktualisieren...

php at imperium dot be
6.08.2010 16:05


Be aware that styles are applied towards the width of the line instead of linear.


To convert a style to be used for thick lines you can use the function below:





<?php


/*


ImageStyleThicken(<aStyle>,<iThickness>) --> <aThickStyle>





<aStyle> is the style array for a thickness of 1 (see imagesetstyle()).


<iThickness> is the new thickness to apply (see imagesetthickness()).





<aThickStyle> is the style array suitable for the given thickness.


*/


function ImageStyleThicken($_1,$_2) {


    $a = array();


    foreach ($_1 as $x) {


        $i = $_2;


        do $a[] = $x; while (--$i>0); }


    return $a;


}


?>

Wander
13.12.2007 20:12


Function to make a line with random fading:



<?php

    function fading_line($img,$sx,$sy,$ex,$ey){

        $r=rand(0,5);$g=rand(0,5);$b=rand(0,5);

        $l=sqrt((($ex-$sx)*($ex-$sx))+(($ey-$sy)*($ey-$sy)));

        for($i=0;$i<$l;$i++){

            $a = array(255-((255/$l)*$i), 255,0,(255/$l)*$i/2,(255/$l)*$i,(255-((255/$l)*$i))/2);

            $style[]=imagecolorallocate($img,$a[$r],$a[$g],$a[$b]);

        }

        imagesetstyle($img,$style);

        imageline($img,$sx,$sy,$ex,$ey,IMG_COLOR_STYLED);

    }

    

    fading_line($img,10,20,490,40);    // image, start x, start y, end x, end y

?>

Michael_Todd_335 at yahoo dot com
27.06.2007 18:40


Watch out! If you pass imagesetstyle() an empty array as the second argument, it will crash your server!

I was messing with it just earlier and accidentally did so, and the page took a good minute to process, when my Apache server came up with the good ol' Windows 'Send Error Report' window.

Cruz at FtUC dot net
15.01.2006 12:45


When lines drawn with imagesetstyle seem to produce a thin white line only, make sure antialiasing is disabled.



<?

  imageantialias($im, false);

  $style = array($gridxcolor, $gridxcolor, IMG_COLOR_TRANSPARENT, IMG_COLOR_TRANSPARENT);

  imagesetstyle($im, $style);

  imageline($im, $x, 0, $x, $ymax+5, IMG_COLOR_STYLED);

  imageantialias($im, true);

?>



Setstyle and Antialias don't go together.

zackbloom at gmail dot com
6.12.2005 23:44


Use this to set the style to any combination of pixels.

You can pass as many modifiers as you wish.

Use the format [num]r[red]g[green]b[blue].



For example:



$im=dashed($im,"4r255g0b0","2r0g255b0","5r0g0b255");

imageline($im, 0, 0, 600, 600, IMG_COLOR_STYLED);



function dashed($im){

$size = func_num_args();

for($i = 0; $i < $size; $i++){

$arg = func_get_arg($i);

if(!is_resource($arg)){

$r=substr($arg,strpos($arg,"r")+1,

strpos($arg,"g")-strpos($arg,"r")-1);

$g=substr($arg,strpos($arg,"g")+1,

strpos($arg,"b")-strpos($arg,"g")-1);

$b=substr($arg,strpos($arg,"b")+1,

strlen($arg)-strpos($arg,"b"));

$color = imagecolorallocate($im,$r,$g,$b);

$x = substr($arg,0,strpos($arg,"r"));

$vals[$i] = array_fill(0,$x,$color);

}

}

for($k=0;$k<count($vals)+1;$k++)

if(array_key_exists($k,$vals)) $prop=array_merge($prop,$vals[$k]);

imagesetstyle($im, $prop);

return $im;

}

yhoko at yhoko dot com
11.08.2004 15:24