note 93585 added to function.imagefilledarc

If this function is not available because you're using an old gdlib version, here is a workaround if you want to draw a pie chart: <?php // width and height of the image $width=200; $height=200; $simulate_old_gd=true; // do not use imagefilledarc although available? // the pieces of the pie (in degree) $pieces=array(180,90,45,25,15,5); $diagram=imagecreate($width,$height); // background color $white=imagecolorallocate($diagram, 255, 255, 255); imagefilledrectangle($diagram,0,0,$width,$height,$white); // the circle is 2px smaller than the image $width-=2; $height-=2; // we need a border color $black=imagecolorallocate($diagram, 0, 0, 0); // draw the border of the pie imagearc($diagram, round($width/2), round($height/2), $width, $height, 0, 360, $black); // position (in degrees) where to place the next piece $position=270; // we will use calculated gray colors for simple example $gray=0; foreach($pieces as $deg) { // calculate the gray color $gray+=30; if($gray>255) $gray=0; $color=imagecolorallocate($diagram,$gray,$gray,$gray); // position must be kept < 360 if($position>360) $position-=360; if(!$simulate_old_gd && is_callable('imagefilledarc')) { imagefilledarc($diagram, round($width/2), round($height/2), $width, $height, $position, $position+$deg, $color,IMG_ARC_EDGED); } else { // we use some maths to calculate the pixel on the circle $pix_x=round(floor(($width-2)/2)*cos($position/180*M_PI) +round($width/2)); $pix_y=round(floor(($height-2)/2)*sin($position/180*M_PI) +round($height/2)); // now we draw a line from the mid of the circle to the // calculated pixel on the circle imageline($diagram, round($width/2), round($height/2), $pix_x, $pix_y, $black); // now we need a pixel for flood filling. //- We could use maths to calculate a pixel inside the // piece: //$fill_x=round(floor(($width-10)/2)* // cos(($position+2)/180*M_PI)+round($width/2)); //$fill_y=round(floor(($height-10)/2)* // sin(($position+2)/180*M_PI)+round($height/2)); //- or we could use an universal pixel with less maths ;) // (top mid): $fill_x=floor($width/2)-2; $fill_y=3; // now we flood fill the circle @imagefilltoborder ($diagram,$fill_x,$fill_y,$black,$color); /* (it does not matter here that we fill more than we need because the next pieces will fix this) IF YOU ONLY WANT ONE PIECE (simulate imagefilledarc) you'd have to draw both border lines and flood fill afterwards */ } // the position of the next piece is $deg degrees further $position+=$deg; } // output the image header('Content-type: image/png'); imagepng($diagram); imagedestroy($digram); ?> ---- Server IP: 217.13.201.10 Probable Submitter: 88.68.74.129 ---- Manual Page -- http://www.php.net/manual/en/function.imagefilledarc.php Edit -- https://master.php.net/note/edit/93585 Del: integrated -- https://master.php.net/note/delete/93585/integrated Del: useless -- https://master.php.net/note/delete/93585/useless Del: bad code -- https://master.php.net/note/delete/93585/bad+code Del: spam -- https://master.php.net/note/delete/93585/spam Del: non-english -- https://master.php.net/note/delete/93585/non-english Del: in docs -- https://master.php.net/note/delete/93585/in+docs Del: other reasons-- https://master.php.net/note/delete/93585 Reject -- https://master.php.net/note/reject/93585 Search -- https://master.php.net/manage/user-notes.php