PHP 5.6.29 Released

imagesetstyle

(PHP 4 >= 4.0.6, PHP 5, PHP 7)

imagesetstyle设定画线的风格

说明

bool imagesetstyle ( resource $image , array $style )

imagesetstyle() 设定所有画线的函数(例如 imageline()imagepolygon())在使用特殊颜色 IMG_COLOR_STYLED 或者用 IMG_COLOR_STYLEDBRUSHED 画一行图像时所使用的风格。

参数

image

由图象创建函数(例如imagecreatetruecolor())返回的图象资源。

style

像素组成的数组。你可以通过常量 IMG_COLOR_TRANSPARENT 来添加一个透明像素。

返回值

成功时返回 TRUE, 或者在失败时返回 FALSE

范例

下面的示例脚本在画布上从左上角到右下角画一行虚线:

Example #1 imagesetstyle() 例子

<?php
header
("Content-type: image/jpeg");
$im  imagecreatetruecolor(100100);
$w   imagecolorallocate($im255255255);
$red imagecolorallocate($im25500);

/* 画一条虚线,5 个红色像素,5 个白色像素 */
$style = array($red$red$red$red$red$w$w$w$w$w);
imagesetstyle($im$style);
imageline($im00100100IMG_COLOR_STYLED);

/* 用 imagesetbrush() 和 imagesetstyle 画一行笑脸 */
$style = array($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");
$w2 imagecolorallocate($brush255255255);
imagecolortransparent($brush$w2);
imagesetbrush($im$brush);
imageline($im10000100IMG_COLOR_STYLEDBRUSHED);

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

以上例程的输出类似于:

Output of example : imagesetstyle()

参见

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User Contributed Notes 6 notes

up
1
Anonymous
4 years ago
a shortcut for basic dashed lines, making it easy to adjust the lengths:

<?php

$length1
= 20;
$length2 = 10;
$style = array_merge(array_fill(0, $length1, $red), array_fill(0, $length2, $w));
imagesetstyle($im, $style);

?>
up
1
Michael_Todd_335 at yahoo dot com
9 years ago
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.
up
-1
Wander
8 years ago
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
?>
up
-1
Cruz at FtUC dot net
10 years ago
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.
up
-1
zackbloom at gmail dot com
11 years ago
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;
}
up
-2
php at imperium dot be
6 years ago
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;
}
?>
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