diese frage wurde sicher schon 1000mal gestellt
sorry aber hab hier nicht wirklich was gefunden
ich erzeuge ein png mit php das scheint auch zu klappen nur die anzeige des bildes ist binär
ich hab im header :
aufrufen tu ich das bild mit :
und erstellt wird es mit :
sorry aber hab hier nicht wirklich was gefunden
ich erzeuge ein png mit php das scheint auch zu klappen nur die anzeige des bildes ist binär
ich hab im header :
PHP-Code:
<meta http-equiv="content-type" content="image/png;"/>
PHP-Code:
print '($myimg)';
PHP-Code:
class gd_gradient_fill {
// Constructor. Creates, fills and returns an image
function gd_gradient_fill($w,$h,$d,$s,$e,$step=0) {
$this->width = $w;
$this->height = $h;
$this->direction = $d;
$this->startcolor = $s;
$this->endcolor = $e;
$this->step = intval(abs($step));
// Attempt to create a blank image in true colors, or a new palette based image if this fails
if (function_exists('imagecreatetruecolor')) {
$this->image = imagecreatetruecolor($this->width,$this->height);
} elseif (function_exists('imagecreate')) {
$this->image = imagecreate($this->width,$this->height);
} else {
die('Unable to create an image');
}
// Fill it
$this->fill($this->image,$this->direction,$this->startcolor,$this->endcolor);
// Show it
$this->display($this->image);
// Return it
return $this->image;
}
// Displays the image with a portable function that works with any file type
// depending on your server software configuration
function display ($im) {
if (function_exists("imagepng")) {
header("Content-type: image/png");
imagepng($im);
}
elseif (function_exists("imagegif")) {
header("Content-type: image/gif");
imagegif($im);
}
elseif (function_exists("imagejpeg")) {
header("Content-type: image/jpeg");
imagejpeg($im, "", 0.5);
}
elseif (function_exists("imagewbmp")) {
header("Content-type: image/vnd.wap.wbmp");
imagewbmp($im);
} else {
die("Doh ! No graphical functions on this server ?");
}
return true;
}
// The main function that draws the gradient
function fill($im,$direction,$start,$end) {
switch($direction) {
case 'horizontal':
$line_numbers = imagesx($im);
$line_width = imagesy($im);
list($r1,$g1,$b1) = $this->hex2rgb($start);
list($r2,$g2,$b2) = $this->hex2rgb($end);
break;
case 'vertical':
$line_numbers = imagesy($im);
$line_width = imagesx($im);
list($r1,$g1,$b1) = $this->hex2rgb($start);
list($r2,$g2,$b2) = $this->hex2rgb($end);
break;
case 'ellipse':
$width = imagesx($im);
$height = imagesy($im);
$rh=$height>$width?1:$width/$height;
$rw=$width>$height?1:$height/$width;
$line_numbers = min($width,$height);
$center_x = $width/2;
$center_y = $height/2;
list($r1,$g1,$b1) = $this->hex2rgb($end);
list($r2,$g2,$b2) = $this->hex2rgb($start);
imagefill($im, 0, 0, imagecolorallocate( $im, $r1, $g1, $b1 ));
break;
case 'ellipse2':
$width = imagesx($im);
$height = imagesy($im);
$rh=$height>$width?1:$width/$height;
$rw=$width>$height?1:$height/$width;
$line_numbers = sqrt(pow($width,2)+pow($height,2));
$center_x = $width/2;
$center_y = $height/2;
list($r1,$g1,$b1) = $this->hex2rgb($end);
list($r2,$g2,$b2) = $this->hex2rgb($start);
break;
case 'circle':
$width = imagesx($im);
$height = imagesy($im);
$line_numbers = sqrt(pow($width,2)+pow($height,2));
$center_x = $width/2;
$center_y = $height/2;
$rh = $rw = 1;
list($r1,$g1,$b1) = $this->hex2rgb($end);
list($r2,$g2,$b2) = $this->hex2rgb($start);
break;
case 'circle2':
$width = imagesx($im);
$height = imagesy($im);
$line_numbers = min($width,$height);
$center_x = $width/2;
$center_y = $height/2;
$rh = $rw = 1;
list($r1,$g1,$b1) = $this->hex2rgb($end);
list($r2,$g2,$b2) = $this->hex2rgb($start);
imagefill($im, 0, 0, imagecolorallocate( $im, $r1, $g1, $b1 ));
break;
case 'square':
case 'rectangle':
$width = imagesx($im);
$height = imagesy($im);
$line_numbers = max($width,$height)/2;
list($r1,$g1,$b1) = $this->hex2rgb($end);
list($r2,$g2,$b2) = $this->hex2rgb($start);
break;
case 'diamond':
list($r1,$g1,$b1) = $this->hex2rgb($end);
list($r2,$g2,$b2) = $this->hex2rgb($start);
$width = imagesx($im);
$height = imagesy($im);
$rh=$height>$width?1:$width/$height;
$rw=$width>$height?1:$height/$width;
$line_numbers = min($width,$height);
break;
default:
}
for ( $i = 0; $i < $line_numbers; $i=$i+1+$this->step ) {
// old values :
$old_r=$r;
$old_g=$g;
$old_b=$b;
// new values :
$r = ( $r2 - $r1 != 0 ) ? intval( $r1 + ( $r2 - $r1 ) * ( $i / $line_numbers ) ): $r1;
$g = ( $g2 - $g1 != 0 ) ? intval( $g1 + ( $g2 - $g1 ) * ( $i / $line_numbers ) ): $g1;
$b = ( $b2 - $b1 != 0 ) ? intval( $b1 + ( $b2 - $b1 ) * ( $i / $line_numbers ) ): $b1;
// if new values are really new ones, allocate a new color, otherwise reuse previous color.
// There's a "feature" in imagecolorallocate that makes this function
// always returns '-1' after 255 colors have been allocated in an image that was created with
// imagecreate (everything works fine with imagecreatetruecolor)
if ( "$old_r,$old_g,$old_b" != "$r,$g,$b")
$fill = imagecolorallocate( $im, $r, $g, $b );
switch($direction) {
case 'vertical':
imagefilledrectangle($im, 0, $i, $line_width, $i+$this->step, $fill);
break;
case 'horizontal':
imagefilledrectangle( $im, $i, 0, $i+$this->step, $line_width, $fill );
break;
case 'ellipse':
case 'ellipse2':
case 'circle':
case 'circle2':
imagefilledellipse ($im,$center_x, $center_y, ($line_numbers-$i)*$rh, ($line_numbers-$i)*$rw,$fill);
break;
case 'square':
case 'rectangle':
imagefilledrectangle ($im,$i*$width/$height,$i*$height/$width,$width-($i*$width/$height), $height-($i*$height/$width),$fill);
break;
case 'diamond':
imagefilledpolygon($im, array (
$width/2, $i*$rw-0.5*$height,
$i*$rh-0.5*$width, $height/2,
$width/2,1.5*$height-$i*$rw,
1.5*$width-$i*$rh, $height/2 ), 4, $fill);
break;
default:
}
}
}
// #ff00ff -> array(255,0,255) or #f0f -> array(255,0,255)
function hex2rgb($color) {
$color = str_replace('#','',$color);
$s = strlen($color) / 3;
$rgb[]=hexdec(str_repeat(substr($color,0,$s),2/$s));
$rgb[]=hexdec(str_repeat(substr($color,$s,$s),2/$s));
$rgb[]=hexdec(str_repeat(substr($color,2*$s,$s),2/$s));
return $rgb;
}
}
?>
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