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Last updated: Sat, 27 Jan 2007

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# imagefilledellipse

(PHP 4 >= 4.0.6, PHP 5)

imagefilledellipse -- Draw a filled ellipse

## Описание

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

Draws an ellipse centered at the specified coordinate on the given `image`.

## Список параметров

`image`

  An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().

`cx`

  x-coordinate of the center

`cy`

  y-coordinate of the center

`width`

  The arc width

`height`

  The arc height

`color`

  The fill color. A color identifier created with imagecolorallocate()

## Возвращаемые значения

Возвращает `TRUE` в случае успешного завершения или `FALSE` в случае возникновения ошибки.

## Примеры

Пример 1. imagefilledellipse() example

`<?php
// create a blank image
$image = imagecreatetruecolor(400, 300);
// fill the background color
$bg = imagecolorallocate($image, 0, 0, 0);
// choose a color for the ellipse
$col_ellipse = imagecolorallocate($image, 255, 255, 255);
// draw the white ellipse
imagefilledellipse($image, 200, 150, 300, 200, $col_ellipse);
// output the picture
header("Content-type: image/png");
imagepng($image);
?>`

Результатом выполнения данного примера будет что-то подобное:

## Примечания

> Замечание: Эта функция нуждается в GD версии 2.0.1 или выше.

## Смотрите также

imageellipse()
imagefilledarc()

add a note User Contributed Notes
imagefilledellipse
sunbox at gmx dot net
20-Oct-2006 04:15
`draws a gradient filled ellipse with alpha color support based on felixbruns at <ANTI-SPAM>web dot de imagegradientellipse function. thx felixbruns :o)
function imagegradientellipsealpha($image, $cx, $cy, $w, $h, $ic, $oc){
$w = abs($w);
$h = abs($h);
$oc = array(0xFF & ($oc >> 0x10), 0xFF & ($oc >> 0x8), 0xFF & $oc);
$ic = array(0xFF & ($ic >> 0x10), 0xFF & ($ic >> 0x8), 0xFF & $ic);
$c0 = ($oc[0] - $ic[0]) / $w;
$c1 = ($oc[1] - $ic[1]) / $w;
$c2 = ($oc[2] - $ic[2]) / $w;
$ot = $oc >> 24;
$it = $ic >> 24;
$ct = ($ot - $it) / $w;
$i = 0;
$j = 0;
$is = ($w<$h)?($w/$h):1;
$js = ($h<$w)?($h/$w):1;
while(1){
$r = $oc[0] - floor($i * $c0);
$g = $oc[1] - floor($i * $c1);
$b = $oc[2] - floor($i * $c2);
$t = $ot - floor($i * $ct);
$c = imagecolorallocatealpha($image, $r, $g, $b, $t);
imageellipse($image, $cx, $cy, $w-$i, $h-$j, $c);
if($i < $w){
$i += $is;
}
if($j < $h){
$j += $js;
}
if($i >= $w && $j >= $h){
break;
}
}
}`
felixbruns at <ANTI-SPAM>web dot de
27-Aug-2006 05:57
`I quickly made a gradient ellipse function (i took some code from other gradient functions). It works like imageellipse or imagefilledellipse but with two color parameters: $ic is the inner color of the gradient ellipse and $oc is the outer color.
<?php
function imagegradientellipse($image, $cx, $cy, $w, $h, $ic, $oc){
$w = abs($w);
$h = abs($h);
$oc = array(0xFF & ($oc >> 0x10), 0xFF & ($oc >> 0x8), 0xFF & $oc);
$ic = array(0xFF & ($ic >> 0x10), 0xFF & ($ic >> 0x8), 0xFF & $ic);
$c0 = ($oc[0] - $ic[0]) / $w;
$c1 = ($oc[1] - $ic[1]) / $w;
$c2 = ($oc[2] - $ic[2]) / $w;
$i = 0;
$j = 0;
$is = ($w<$h)?($w/$h):1;
$js = ($h<$w)?($h/$w):1;
while(1){
$r = $oc[0] - floor($i * $c0);
$g = $oc[1] - floor($i * $c1);
$b = $oc[2] - floor($i * $c2);
$c = imagecolorallocate($image, $r, $g, $b);
imagefilledellipse($image, $cx, $cy, $w-$i, $h-$j, $c);
if($i < $w){
$i += $is;
}
if($j < $h){
$j += $js;
}
if($i >= $w && $j >= $h){
break;
}
}
}
?>`
jbr at ya-right dot com
22-Feb-2006 07:33
`This is a niffty function that you can use to make transparent ellipse/round type cutouts of any PNG or GIF image. The hard part is finding what color to use for the cutout layer and then the transparent layer, because you don't want to set the transparent index to a color being used in the image. After that it's as simple as layering the two images together.
what you need for the example...
a image of the size you want the cutout to be, gif or png (true color /256) can be used!
<?
$original_image = './image.png';
$output_image = './new.png';
$temp_image = './temp'; // path and name (don't include the extension)
$is_true_color = true;
$ext = substr ( $original_image, strrpos ( $original_image, '.' ) );
$temp_image .= $ext;
$new = image_get ( $ext, $original_image );
$width = imagesx ( $new );
$height = imagesy ( $new );
// we need to create temp reduced image so we can get the colors
// in a high bit true color image (png 16,24 bit only)
if ( $is_true_color )
{
imagetruecolortopalette ( $new, false, 256 );
image_make ( $new, $ext, $temp_image );
imagedestroy ( $new );
$colors = get_rgb ( $temp_image, $ext );
@unlink ( $temp_image );
$new = image_get ( $ext, $original_image );
}
else
{
$colors = get_rgb ( $original_image, $ext );
}
// this creates the cutout layer (2 colors, both will become transparent)
$old = imagecreate ( $width, $height );
imageantialias( $old, true );
imagecolorallocate ( $old, $colors[0]['red'], $colors[0]['green'], $colors[0]['blue'] );
$bg = imagecolorallocate ( $old, $colors[1]['red'], $colors[1]['green'], $colors[1]['blue'] );
imagefilledellipse ( $old, floor ( $width / 2 ), floor ( $height / 2 ), $width, $height, $bg );
imagecolortransparent ( $old, $bg );
imagecopy ( $new, $old, 0, 0, 0, 0, $width, $height );
image_make ( $new, $ext, $output_image );
imagedestroy ( $old );
imagedestroy ( $new );
// this layers both images together, making a nice ellipse/round transparent image cutout
$old = imagecreate ( $width, $height );
$new = image_get ( $ext, $output_image );
$tbg = imagecolorallocate ( $old, $colors[0]['red'], $colors[0]['green'], $colors[0]['blue'] );
imagecopy ( $old, $new, 0, 0, 0, 0, $width, $height );
imagecolortransparent ( $old, $tbg );
image_make ( $old, $ext, $output_image );
imagedestroy ( $old );
imagedestroy ( $new );
/*
* shortcut functions (1,2)
*/
// returns the called image resource
function image_get ( $ext, $name )
{
switch ( $ext )
{
case '.gif' :
return ( imagecreatefromgif ( $name ) );
break;
case '.png' :
return ( imagecreatefrompng ( $name ) );
break;
}
}
// outputs the image named passed to it
function image_make ( $io, $ext, $name )
{
switch ( $ext )
{
case '.gif' :
imagegif ( $io, $name );
break;
case '.png' :
imagepng ( $io, $name );
break;
}
}
// get (2) colors not found in the current image
function get_rgb ( $image, $ext )
{
$x = 0;
$colors = array ();
$img = image_get ( $ext, $image );
for ( $color = 10; $color <= 250; $color++ )
{
if ( imagecolorexact ( $img, $color, $color, $color ) == -1 )
{
$colors[] = array ( 'red' => $color, 'green' => $color, 'blue' => $color );
if ( $x == 1 )
{
imagedestroy ( $img );
return ( $colors );
}
$x++;
}
}
imagedestory ( $img );
return ( $colors );
}
?>
You can try a demo here (SGML) capture a web page, then make multi cutouts example!
http://www.ya-right.com/`
mark at freegeekchicago dot org
11-Oct-2005 10:12
`Here is a simple script using imagefilledellipse to created rounded corners on the fly. It takes color, bg_color, width, height, and placement (i.e. top left, bottom right) as arguments.
<?php
$color = $_REQUEST['color'];
$bg_color = $_REQUEST['bg_color'];
$c_width = $_REQUEST['width'];
$c_height = $_REQUEST['height'];
$placement = $_REQUEST['placement'];
$width = 2 * $c_width;
$height = 2 * $c_height;
// create a blank image
$image = imagecreatetruecolor($c_width, $c_height);
// fill the corner color
$col_ellipse = hex2int($image, $color);
// fill the background color
$bg = hex2int($image, $bg_color);
// fill the background color
imagefill($image, 0, 0, $bg);
// draw the ellipse
//takes (resource image, int cx, int cy, int w, int h, int color)
// bottom right corner
if ($placement == "br") {imagefilledellipse($image, 0, 0, $width, $height, $col_ellipse);}
// top right corner
if ($placement == "tl") {imagefilledellipse($image, $c_width, $c_height, $width, $height, $col_ellipse);}
// top left corner
if ($placement == "tr") {imagefilledellipse($image, 0, $c_height, $width, $height, $col_ellipse);}
// bottom left corner
if ($placement == "bl") {imagefilledellipse($image, $c_width, 0, $width, $height, $col_ellipse);}
// output the picture
header("Content-type: image/png");
imagepng($image);
function hex2int($image, $color) {
$string = str_replace("#","",$color);
$red = hexdec(substr($string,0,2));
$green = hexdec(substr($string,2,2));
$blue = hexdec(substr($string,4,2));
$color_int = imagecolorallocate($image, $red, $green, $blue);
return($color_int);
}
?>
You would call it like so:
<img src="round_test.php?
width=50&height=50&color=fffefe&bg_color=99e1e0&placement=tr">`
richard at mf2fm dot co dot uk
09-Feb-2005 02:25
`Here is a piece of code using imagefilledellipse which creates a simulation of the current phase of the moon...
Usage is <img src="moon.php?size=100"> which produces an image 100px by 100px wide. If size is left out, the default is 24px by 24px.
<?php
$mps=2551442.8; // moon phase in seconds (29 days, 12 hours, 44 mins, 2.8 secs)
$position=time()-mktime(10, 32, 0, 1, 25, 2005); // seconds since full moon at 10:32GMT on 25 Jan 2005
$position=($position-$mps*intval($position/$mps))/$mps; // phase from 0 to 1
$position=2*(0.5-$position);
## revised to produce easier to work with...
## $position=1 - full moon
## $position=0 - new moon
## $position=-1 - full moon
$size=$_GET['size'];
if (!is_numeric($size)) $size=24; // width/height in pixels
$moon=imagecreate($size, $size);
$dark=imagecolorallocate($moon, 0, 34, 68); // background colour for moon
$light=imagecolorallocate($moon, 238, 238, 255); // foreground colour for moon
$corona=imagecolorallocatealpha($moon, 153, 153, 153, 64); // edge of moon (semi-transparent)
##
## Make transparent background
##
$background=imagecolorallocatealpha($moon, 0, 0, 0, 127);
imagefill($moon, 0, 0, $background);
##
## Make the moon!
##
imagefilledellipse($moon, round($size/2), round($size/2), $size, $size, $corona);
if ($position>-1/$size AND $position<1/$size) imagefilledellipse($moon, round($size/2), round($size/2), $size-2, $size-2, $dark); // new moon
elseif (abs($position)>1-1/$size) imagefilledellipse($moon, round($size/2), round($size/2), $size-2, $size-2, $light); // full moon
elseif ($position>0) {
imagefilledellipse($moon, round($size/2), round($size/2), $size-2, $size-2, $light);
for ($i=0; $i<$size-2; $i++) {
$xpos=($size-2)/2;
$xpos=1-($i/$xpos);
$xpos=sqrt(1-($xpos*$xpos));
$xpos=($size/2)+($position-0.5)*$xpos*($size-2);
imagesetpixel($moon, round($xpos), $i+1, $dark);
}
for ($i=0; $i<$size; $i++) {
$set=0;
for ($j=0; $j<$size; $j++) {
if (!$set AND imagecolorat($moon, $j, $i)==$dark) $set=1;
elseif ($set AND imagecolorat($moon, $j, $i)==$light) imagesetpixel($moon, $j, $i, $dark);
}
}
}
else {
imagefilledellipse($moon, round($size/2), round($size/2), $size-2, $size-2, $dark);
for ($i=0; $i<$size-2; $i++) {
$xpos=($size-2)/2;
$xpos=1-($i/$xpos);
$xpos=sqrt(1-($xpos*$xpos));
$xpos=($size/2)+($position+0.5)*$xpos*($size-2);
imagesetpixel($moon, round($xpos), $i+1, $light);
}
for ($i=0; $i<$size; $i++) {
$set=0;
for ($j=0; $j<$size; $j++) {
if (!$set AND imagecolorat($moon, $j, $i)==$light) $set=1;
elseif ($set AND imagecolorat($moon, $j, $i)==$dark) imagesetpixel($moon, $j, $i, $light);
}
}
}
##
## And output the picture
##
header ("Content-Type: image/png");
imagepng($moon);
imagedestroy($moon);
?>`
dave at corecommunications dot us
10-Oct-2002 06:56
`I needed to draw translucent circles on an existing image, using imagealphablending($image,true);. Turns out that imagefilledellipse seems to do the ellipse by drawing a series of lines from the centroid out to the circumference. Problem with this is that pixels near the center very visibly get drawn multiple times, producing a kind of moire effect. Also, the 0-degree (center to right) line is drawn twice and so is twice as dark the pixel below it.
My workaround was to draw the ellipse solid in a copy of the source image and do an imagecopymerge back into the original.`
ivank at 2xtreme dot net
30-Mar-2002 04:31
`Sometimes, you have x1, y1, x2, y2 parameters, but not the center, width, and height. Use this to draw a filled ellipse from your x1, y1, x2, and y2:
ImageFilledEllipse(
$im,
($x1 + round(($x2 - $x1) / 2)),
($y1 + round(($y2 - $y1) / 2)),
($x2 - $x1),
($y2 - $y1),
$color);`
harry dot wood at ic dot ac dot uk
19-Jun-2001 04:09
`This draws a rotated ellipse. If you don't want filled ellipses, then you don't need the triangle function.
function triangle($x1,$y1, $x2,$y2, $x3,$y3, $colour) {
global $im;
$coords = array($x1,$y1, $x2,$y2, $x3,$y3);
imagefilledpolygon($im, $coords, 3, $colour);
}
function rotatedellipse($cx, $cy, $width, $height, $rotateangle, $colour, $filled=true) {
global $im;
$step=15;
$cosangle=cos(deg2rad($rotateangle));
$sinangle=sin(deg2rad($rotateangle));
$squishratio = $height/$width;
$nopreviouspoint = true;
for ($angle=0; $angle<=(180+$step); $angle+=$step) {
$ox = ($width * cos(deg2rad($angle)));
$oy = ($width * sin(deg2rad($angle))) * $squishratio;
$x = ($ox * $cosangle) - ($oy * $sinangle);
$y = ($ox * $sinangle) + ($oy * $cosangle);
if ($nopreviouspoint) {
$px=$x;
$py=$y;
$nopreviouspoint=false;
}
if ($filled) {
triangle($cx, $cy, $cx+$px, $cy+$py, $cx+$x, $cy+$y, $colour);
triangle($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;
}
}`
add a note
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Last updated: Sat, 27 Jan 2007
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