imageellipse

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

imageellipseDraw an ellipse

설명

bool imageellipse ( resource $image , int $cx , int $cy , int $width , int $height , int $color )

Draws an ellipse centered at the specified coordinates.

인수

image

imagecreatetruecolor() 등의 이미지 생성 함수에서 반환한 이미지 자원.

cx

x-coordinate of the center.

cy

y-coordinate of the center.

width

The ellipse width.

height

The ellipse height.

color

The color of the ellipse. A color identifier created with imagecolorallocate().

반환값

성공 시 TRUE를, 실패 시 FALSE를 반환합니다.

예제

Example #1 imageellipse() example

<?php

// Create a blank image.
$image imagecreatetruecolor(400300);

// Select the background color.
$bg imagecolorallocate($image000);

// Fill the background with the color selected above.
imagefill($image00$bg);

// Choose a color for the ellipse.
$col_ellipse imagecolorallocate($image255255255);

// Draw the ellipse.
imageellipse($image200150300200$col_ellipse);

// Output the image.
header("Content-type: image/png");
imagepng($image);

?>

위 예제의 출력 예시:

Output of example : imageellipse()

주의

Note:

imageellipse() ignores imagesetthickness().

참고

add a note add a note

User Contributed Notes 3 notes

up
0
simon_nuttall at hotmail dot com
15 years ago
This is an optimised and bug fixed version of nojer at yahoo dot com's rotatedellipse function. I've changed it so that the arguments are compatible with imageellipse. See notes on imagearc for original version.

<?php

function rotatedellipse($im, $cx, $cy, $width, $height, $rotateangle, $colour, $filled=false) {
 
// modified here from nojer's version
  // Rotates from the three o-clock position clockwise with increasing angle.
  // Arguments are compatible with imageellipse.

 
$width=$width/2;
 
$height=$height/2;

 
// This affects how coarse the ellipse is drawn.
 
$step=3;

 
$cosangle=cos(deg2rad($rotateangle));
 
$sinangle=sin(deg2rad($rotateangle));

 
// $px and $py are initialised to values corresponding to $angle=0.
 
$px=$width * $cosangle;
 
$py=$width * $sinangle;
 
  for (
$angle=$step; $angle<=(180+$step); $angle+=$step) {
   
   
$ox = $width * cos(deg2rad($angle));
   
$oy = $height * sin(deg2rad($angle));
   
   
$x = ($ox * $cosangle) - ($oy * $sinangle);
   
$y = ($ox * $sinangle) + ($oy * $cosangle);

    if (
$filled) {
     
triangle($im, $cx, $cy, $cx+$px, $cy+$py, $cx+$x, $cy+$y, $colour);
     
triangle($im, $cx, $cy, $cx-$px, $cy-$py, $cx-$x, $cy-$y, $colour);
    } else {
     
imageline($im, $cx+$px, $cy+$py, $cx+$x, $cy+$y, $colour);
     
imageline($im, $cx-$px, $cy-$py, $cx-$x, $cy-$y, $colour);
    }
   
$px=$x;
   
$py=$y;
  }
}

function
triangle($im, $x1,$y1, $x2,$y2, $x3,$y3, $colour) {
  
$coords = array($x1,$y1, $x2,$y2, $x3,$y3);
  
imagefilledpolygon($im, $coords, 3, $colour);
}

?>
up
0
julian
17 years ago
if you want to display an ellipse in the upper left corner of an image, you can easily calculate the corresponding cx and cy values. this example will draw an ellipse having the same width and height as the image.

<?php

$ellipse_width
= 100;
$ellipse_height = 200;

$ellipse_cx = ($ellipse_width / 2);
$ellipse_cy = ($ellipse_height / 2);

$img_x = $ellipse_width;
$img_y = $ellipse_height;

$img = imagecreate($img_x, $img_y);
$bg = imagecolorallocate($img, 255,255,255);

$ellipse_color = imagecolorallocate($img, 0, 0, 0);

imageellipse($img, $ellipse_cx, $ellipse_cy, $ellipse_width, $ellipse_height, $ellipse_color);

header("Content-type: image/png");
imagepng($img);
imagedestroy($img);

?>
up
0
agentyoungsoo at hanmail dot net
19 years ago
When you wana use "ImageEllipse" function
in under GD 2.0.2 version, you can use "ImageArc" like bellow

----------------------------------------------------
$file_name = "test.png";

$screen_x = 300;
$screen_y = 200;

$x1 = $screen_x / 2;
$y1 = $screen_y / 2;

$radius = 30;

$image = ImageCreate($screen_x, $screen_y);
$black = ImageColorAllocate($image, 0,0,0);

ImageArc($image, $x1, $y1, $radius , $radius , 0, 360, $black);

ImagePng($image, $file_name);
ImageDestroy($image);
----------------------------------------------------
To Top