imagesetpixel
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;
}
?>
imagesetstyle
(PHP 4 >= 4.0.6, PHP 5)
imagesetstyle — Configure le style pour le dessin des lignes
Description
bool imagesetstyle
( resource
$image
, array $style
)
imagesetstyle() permet de choisir le style à utiliser
lors du dessin des lignes (comme avec les fonctions imageline()
et imagepolygon()) lors de l'utilisation de la
couleur spéciale IMG_COLOR_STYLED ou bien lors du
dessin de lignes avec la couleur IMG_COLOR_STYLEDBRUSHED.
Liste de paramètres
-
image -
Une ressource d'image, retournée par une des fonctions de création d'images, comme imagecreatetruecolor().
-
style -
Un tableau de couleurs de pixels. Vous pouvez utiliser la constante
IMG_COLOR_TRANSPARENTpour ajouter un pixel transparent.
Valeurs de retour
Cette fonction retourne TRUE en cas de
succès ou FALSE si une erreur survient.
Exemples
L'exemple suivant dessine une ligne pointillée depuis le coin supérieur gauche vers le coin inférieur droit de l'image :
Exemple #1 Exemple pour imagesetstyle()
<?php
header("Content-type: image/jpeg");
$im = imagecreatetruecolor(100, 100);
$w = imagecolorallocate($im, 255, 255, 255);
$red = imagecolorallocate($im, 255, 0, 0);
/* Dessine une ligne pointillée de 5 pixels rouges, 5 pixels blancs */
$style = array($red, $red, $red, $red, $red, $w, $w, $w, $w, $w);
imagesetstyle($im, $style);
imageline($im, 0, 0, 100, 100, IMG_COLOR_STYLED);
/* Dessine une ligne avec des smileys, en utilisant imagesetbrush() et 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);
?>
L'exemple ci-dessus va afficher quelque chose de similaire à :
Voir aussi
- imagesetbrush() - Modifie la brosse pour le dessin des lignes
- imageline() - Dessine une ligne
add a note
User Contributed Notes
imagesetstyle
php at imperium dot be
06-Aug-2010 07:05
Wander
13-Dec-2007 11:12
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-Jun-2007 09:40
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-Jan-2006 03:45
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
06-Dec-2005 02:44
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-Aug-2004 06:24
When drawing lines that are >1px thick you'll have to setup the array corresponding to this fact (since there's no multi-array support for this function).
For example if the line's 3 pixels thick each 2nd color goes to the 2nd line, each 3rd color to the 3rd line and so on.