imagefilledarc

imageellipse

Last updated: Fri, 13 Nov 2009

imagefill

(PHP 4, PHP 5)

imagefill — Flood fill

Descrição

bool imagefill ( resource $image , int $x , int $y , int $color )

Performs a flood fill starting at the given coordinate (top left is 0, 0) with the given color in the image .

Parâmetros

image: An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
x: x-coordinate of start point.
y: y-coordinate of start point.
color: The fill color. A color identifier created with imagecolorallocate().

Valor Retornado

Retorna TRUE em caso de sucesso ou FALSE em falhas.

Exemplos

Exemplo #1 imagefill() example


<?php

$im = imagecreatetruecolor(100, 100);

// sets background to red
$red = imagecolorallocate($im, 255, 0, 0);
imagefill($im, 0, 0, $red);

header('Content-type: image/png');
imagepng($im);
imagedestroy($im);
?>

O exemplo acima irá imprimir algo similar a:

Veja Também

imagecolorallocate() - Aloca uma cor para uma imagem

imagefilledarc

imageellipse

Last updated: Fri, 13 Nov 2009

add a note User Contributed Notes
imagefill

Christopher Kramer
06-Oct-2009 10:00


Here is a function to generate a gradient.

You specify width, heigth and 4 colors (of the 4 corners).



An image handle of the gradient image will be returned.

You can copy the returned image onto another image using imageecopy.

This can be helpful if you want to generate a shadow for example.

("Glow effect example": Generate 8 gradients, one for each side and one for each corner. The outer side of the gradients have the background color and the inner sides have a bright color such as white.)  



But beware: This function is not optimized for performance, it might become slow on big images. For shadows, better cache the generated gradients.



Note: For gradients, using true-color is highly recommended.



<?php



function gradient($w=100, $h=100, $c=array('#FFFFFF','#FF0000','#00FF00','#0000FF'), $hex=true) {



 /*

 Generates a gradient image



 Author: Christopher Kramer

 

 Parameters:

 w: width in px

 h: height in px

 c: color-array with 4 elements:

    $c[0]:   top left color

    $c[1]:   top right color

    $c[2]:   bottom left color

    $c[3]:   bottom right color

    

 if $hex is true (default), colors are hex-strings like '#FFFFFF' (NOT '#FFF')

 if $hex is false, a color is an array of 3 elements which are the rgb-values, e.g.:

 $c[0]=array(0,255,255);

 

 */

 

 $im=imagecreatetruecolor($w,$h);

 

 if($hex) {  // convert hex-values to rgb

  for($i=0;$i<=3;$i++) { 

   $c[$i]=hex2rgb($c[$i]);

  }

 }

 

 $rgb=$c[0]; // start with top left color

 for($x=0;$x<=$w;$x++) { // loop columns

  for($y=0;$y<=$h;$y++) { // loop rows

   // set pixel color 

   $col=imagecolorallocate($im,$rgb[0],$rgb[1],$rgb[2]);

   imagesetpixel($im,$x-1,$y-1,$col);

   // calculate new color  

   for($i=0;$i<=2;$i++) {

    $rgb[$i]=

      $c[0][$i]*(($w-$x)*($h-$y)/($w*$h)) +

      $c[1][$i]*($x     *($h-$y)/($w*$h)) +

      $c[2][$i]*(($w-$x)*$y     /($w*$h)) +

      $c[3][$i]*($x     *$y     /($w*$h));

   }

  }

 }

 return $im;

}



function hex2rgb($hex)

 {

 $rgb[0]=hexdec(substr($hex,1,2));

 $rgb[1]=hexdec(substr($hex,3,2));

 $rgb[2]=hexdec(substr($hex,5,2));

 return($rgb);

 }



// usage example



$image=gradient(300, 300, array('#000000', '#FFFFFF', '#FF0000', '#0000FF'));



header('Content-type: image/png');

imagepng($image);

imagedestroy($image);



?>

dunhamzzz [A] gmail
01-Sep-2008 03:36


I feel its worth pointing out that you cannot fill a transparent colour that you have assigned with imagecolorallocatealpha, the colour will fill, but without its transparency,



I find the easiest method around this is to just fill a rectangle using imagefilledrectangle() to draw a fill instead.

daniel_nocturnal at hotmail dot com
08-Jul-2008 02:27


I've used razonklnbd's example, I had to fill an image with a background pattern from an image (file). So I put the code to pieces and come up with a lighter version that suited me, all thanks to razonklnbd.



My version receives three parameters, $image, $width, $height.



$image = The background pattern image

$width = Width of the new image

$height = Height of the new image



<?php

    function imagefillfromfile($image, $width, $height) {

        $imageWidth = imagesx($image);

        $imageHeight = imagesy($image);

        $newImage = imagecreatetruecolor($width, $height);

        

        for ($imageX = 0; $imageX < $width; $imageX += $imageWidth) {

            for ($imageY = 0; $imageY < $height; $imageY += $imageHeight) {

                imagecopy($newImage, $image, $imageX, $imageY, 0, 0, $imageWidth, $imageHeight);

            }

        }

        

        return($newImage);

        imagedestroy($newImage);

    }

?>



This function returns a new image with a filled canvas of an image (file) with a fixed width/height.



Example usage:



<?php

    $pattern = imagecreatefrompng('pattern.png');

    $image = imagefillfromfile($pattern, 400, 300);

    imagepng($image);

    imagedestroy($image);

    imagedestroy($pattern);

?>

Cypog
17-Mar-2008 03:27


imagefill can't deal with alpha colors, use imagefilledrectangle instead.



<?php



    header("Content-Type: image/png");

    $im = imagecreatefrompng("img/button.png");

    if (empty($_GET['alpha']))

        {$_GET['alpha'] = 10;}

    $color = imagecolorallocatealpha($im, 255, 255, 255, $_GET['alpha']);

    imagefillalpha($im, $color);

    imagepng($im);

    imagedestroy($im);



    function ImageFillAlpha($image, $color)

    {

        imagefilledrectangle($image, 0, 0, imagesx($image), imagesy($image), $color);

    }



?>

info at educar dot pro dot br
09-Mar-2007 03:54


Example 1

The filled region will be external to a demarcated region, if the initial coordinates will be outside of this region.



<?php

$src621 = imagecreate(200,200); 

$clr_1_621 = imagecolorallocate($src621, 255, 255, 0);

$clr_2_621 = imagecolorallocate($src621, 0, 0, 250);

$clr_4_621 = imagecolorallocate($src621, 2,2,55);

imagerectangle($src621, 100, 100, 150, 150, $clr_4_621);

imagefill($src621, 110, 110, $clr_2_621);

header("Content-Type: image/png");

imagepng ($src621);

imagedestroy($src621);

?>



Example 2

The filled region will be internal to a demarcated region, if the initial coordinates will be inside of this region. 

<?php

$src622 = imagecreate(200,200); 

$clr_1_622 = imagecolorallocate($src622, 255, 255, 0);

$clr_2_622 = imagecolorallocate($src622, 0, 0, 250);

$clr_4_622 = imagecolorallocate($src622, 2,2,55);

imagerectangle($src622, 100, 100, 150, 150, $clr_4_622);

imagefill($src622, 10, 10, $clr_2_622);

header("Content-Type: image/png");

imagepng ($src622);

imagedestroy($src622);

?>



See another examples at:

http://www.educar.pro.br/a/gdlib/index.php?pn=50&tr=97

Gromitt
06-Mar-2007 06:14


If you need to fill a whole image (immediatly after its creation for instance), consider applying a filled rectangle instead, using imagefilledrectangle() :



<?php



$gdImage = imagecreatetruecolor(100, 100);

$gdColor = imagecolorallocate($gdImage, 255, 0, 0); // red

imagefilledrectangle($gdImage, 0, 0, 99, 99, $gdColor);



?>



which will require much less logic and processing from GD.

razonklnbd at yahoo dot com
24-Sep-2006 10:32


I spend more then two hour to find a function that can fill a pattern or file as background instead of color. but i can't find. so i develop the following function. i though this function will save time who need it...



Function will get four parameter

1. Main Image Identifier

2. Pattern Image Identifier

3. Final Image Width

4. Final Image Height



If you set final image width or height is less then main image width or height then you may get wrong result



<?php



function fill_with_patternfile($p_main_im, $p_patternfile_im, $p_width, $p_height){

    $pimiX=$p_patternfile_im;

    $pw=imagesx($pimiX);

    $ph=imagesy($pimiX);

    $targetImageIdentifier=imagecreatetruecolor($p_width,$p_height);

    if($pw<$p_width && $ph<$p_height){

        for($pX=0;$pX<$p_width;$pX+=$pw){

            for($pY=0;$pY<$p_height;$pY+=$ph){

                imagecopy($targetImageIdentifier,$pimiX,$pX,$pY,0,0,$pw,$ph);

            }

        }

    }else imagecopy($targetImageIdentifier,$pimiX,0,0,0,0,$pw,$ph);

    $w=imagesx($p_main_im);

    $h=imagesy($p_main_im);

    $nX=0;

    if($w<$p_width) $nX=intval(($p_width-$w)/2);

    $nY=0;

    if($h<$p_height) $nY=intval(($p_height-$h)/2);

    imagecopy($targetImageIdentifier,$p_main_im,$nX,$nY,0,0,$w,$h);

    return $targetImageIdentifier;

}

//    If you want to use a gif or png file as

//    pattern file you need to change function below :)

$pattern_im=imagecreatefromjpeg('logo.jpg');

//    If you want to use a gif or png file as

//    main file you need to change function below :)

$main_im=imagecreatefromjpeg('r2.jpg');

//    call the function width 500 and height 500

//    if your width and height is less then main images

//    width and height then you can't understand any change!

$final=fill_with_patternfile($main_im, $pattern_im, 500, 500);

//    view the image and destroy all instance

header('Content-type: image/jpeg');

imagejpeg($final);

imagedestroy($final);

imagedestroy($main_im);

imagedestroy($pattern_im);

exit();



?>

jonathan dot aquino at gmail dot com
08-Jun-2006 10:12


Use imageSaveAlpha($image, true); to preserve transparency.

gelak
30-Nov-2005 07:27


//A smiley face ;]





<?php





header('Content-type: image/png');





$smile=imagecreate(400,400);


$kek=imagecolorallocate($smile,0,0,255);


$feher=imagecolorallocate($smile,255,255,255);


$sarga=imagecolorallocate($smile,255,255,0);


$fekete=imagecolorallocate($smile,0,0,0);


imagefill($smile,0,0,$kek);





imagearc($smile,200,200,300,300,0,360,$fekete);


imagearc($smile,200,225,200,150,0,180,$fekete);


imagearc($smile,200,225,200,123,0,180,$fekete);


imagearc($smile,150,150,20,20,0,360,$fekete);


imagearc($smile,250,150,20,20,0,360,$fekete);


imagefill($smile,200,200,$sarga);


imagefill($smile,200,290,$fekete);


imagefill($smile,155,155,$fekete);


imagefill($smile,255,155,$fekete);


imagepng($smile);





?>

pisu at estmail dot hu
29-Nov-2005 09:48


chess board

<?php



$kep = imagecreate(400,400);

$fekete = imagecolorallocate($kep,0,0,0);

$feher = imagecolorallocate($kep,255,255,255);



//imagefill($kep,50,50,$fekete);

imagefill($kep,50,20,$feher);



for ($i=1;$i<8;$i++)  {

  $k = $i*50;

  imageline($kep,0,$k,400,$k,$fekete);

  imageline($kep,$k,0,$k,400,$fekete);

  }



for ($i=0;$i<8;$i++)  {

  for ($j=0;$j<8;$j++)  {

    $x = $i*50 + 2;

        $y = $j*50 + 2;

    if (  ( ($i % 2) + ($j % 2) )  % 2 == 0 )  {

          imagefill($kep,$x,$y,$fekete);

          }



    }

  }



// imagecolortransparent($kek,$piros);



header('content-type : image/png');

imagepng($kep);



?>

colin at galaxyinteractive dot net
29-Jul-2005 03:26


Didn't see this documented, although it's outlined in imagefilledrectangle, it wasn't quite so obvious to me at first



imageSetTile($image,$imageBack);

imagefill($image,0,0,IMG_COLOR_TILED);



Will fill an image with a texture (this is great as I'm building a logo/template creator)

Igor Garcia
28-Jun-2003 10:18


This function, cannot deal with transparencies. 

So you need to use imagecolorallocate instead of imagecolorallocatealpha.

Thus, be careful with color variables that allready set with imageallocatecoloralpha because this can slow-down or hang-up your system.

norxh
05-Jun-2003 03:36


For new images, you must allocate a color before this function will work.

08-Feb-2003 01:49


Actually, it can handle pre-transparent images. To remove it you need to do something like:

   imagecolortransparent($img, 0);

to null out the previous transparency colors. ;)

aqmprod at iname dot com
09-Jan-2000 01:08


This function does not seem to work with images already been transparent. If you fill at x=0, y=0, and there are still transparent parts that you did


not reach with your fill, they change to a different color.





The ImageColorSet function seems to be the solution, but i can't work with transparancy.

add a note

imagefilledarc

imageellipse

Last updated: Fri, 13 Nov 2009