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    imagefill

    (PHP 4, PHP 5, PHP 7, PHP 8)

    imagefill — Flutfüllung

    Beschreibung

    imagefill(
        GdImage $image,
        int $x,
        int $y,
        int $color
    ): bool

    Führt eine Flutfüllung beginnend an der angegebenen Koordinate (oben links ist 0,0) mit der angegebenen Farbe color im Bild image durch.

    Parameter-Liste

    image

    Ein GdImage-Objekt, das von einer der Funktionen zur Bilderzeugung, z. B. imagecreatetruecolor(), zurückgegeben wurde.

    x

    x-Koordinate des Anfangspunkts.

    y

    y-Koordinate des Anfangspunkts.

    color

    Die Füllfarbe. Eine Farbkennung, die mit imagecolorallocate() erzeugt wurde.

    Rückgabewerte

    Gibt bei Erfolg true zurück. Bei einem Fehler wird false zurückgegeben.

    Changelog

    Version Beschreibung
    8.0.0 image erwartet nun eine GdImage-Instanz; vorher wurde eine gültige gd-Ressource erwartet.

    Beispiele

    Beispiel #1 imagefill()-Beispiel

    <?php

    $im     = imagecreatetruecolor(100, 100);

    // Färbt den Hintergrund rot
    $red = imagecolorallocate($im, 255, 0, 0);
    imagefill($im, 0, 0, $red);

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

    Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

    Ausgabe des Beispiels: imagefill()

    Siehe auch

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    User Contributed Notes 16 notes

    up
    24
    George Edison
    12 years ago
    Creating a new true-color image, filling it with a transparent color, and saving it as a PNG image can be accomplished with the following:

    <?php

    $new       = imagecreatetruecolor(320, 320);
    $color = imagecolorallocatealpha($new, 0, 0, 0, 127);
    imagefill($new, 0, 0, $color);
    imagesavealpha($new, TRUE); // it took me a good 10 minutes to figure this part out
    imagepng($new);

    ?>

    The image needs to be created with imagecreatetruecolor(), you must use imagefill() instead of imagefilledrectange(), and you need to call imagesavealpha(). No other combination of functions calls seems to produce the intended results.
    up
    8
    Christopher Kramer
    15 years ago
    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);

    ?>
    up
    2
    pisu at estmail dot hu
    18 years ago
    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);

    ?>
    up
    1
    gelak
    18 years ago
    //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);

    ?>
    up
    1
    dunhamzzz [A] gmail
    16 years ago
    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.
    up
    2
    Gromitt
    17 years ago
    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.
    up
    0
    Cypog
    16 years ago
    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);
        }

    ?>
    up
    0
    razonklnbd at yahoo dot com
    18 years ago
    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();

    ?>
    up
    0
    norxh
    21 years ago
    For new images, you must allocate a color before this function will work.
    up
    0
    aqmprod at iname dot com
    24 years ago
    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.
    up
    -1
    Anonymous
    21 years ago
    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. ;)
    up
    -2
    colin at galaxyinteractive dot net
    19 years ago
    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)
    up
    -2
    Igor Garcia
    21 years ago
    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.
    up
    -1
    oleh at it dot wihola dot com
    7 years ago
    is there any point to use $x and $y coordinates? They doesn't affect an output in any way. I can no make rectangular half filled with color. These params are useless.
    up
    -2
    jonathan dot aquino at gmail dot com
    18 years ago
    Use imageSaveAlpha($image, true); to preserve transparency.
    up
    -4
    info at educar dot pro dot br
    17 years ago
    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
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