I wanted to clear an image, and set it to full transparent.
imagefilledrectangle() seems to ignore alpha channel and alpha blending.
Use imagefill() instead:
<?php
$w = imagesx($final);
$h = imagesy($final);
$grande = imagecreatetruecolor($w, $h);
// Alpha blending on to use channel alpha
imagealphablending($grande, true);
// Allocate a transparent color and fill the new image with it.
// Without this the image will have a black background instead
// of being transparent.
$transparent = imagecolorallocatealpha($grande, 0, 0, 0, 127);
// transparent alpha will be _ignored_:
imagefilledrectangle($grande, 0, 0, $w, $h, $transparent);
// ok, transparent will be used and set whole alpha channel to transparent:
imagefill($grande, 0, 0, $transparent);
?>
imagefilledrectangle
(PHP 4, PHP 5)
imagefilledrectangle — Draw a filled rectangle
Description
bool imagefilledrectangle
( resource
$image
, int $x1
, int $y1
, int $x2
, int $y2
, int $color
)
Creates a rectangle filled with color in the given
image starting at point 1 and ending at point 2.
0, 0 is the top left corner of the image.
Parameters
-
image -
An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
-
x1 -
x-coordinate for point 1.
-
y1 -
y-coordinate for point 1.
-
x2 -
x-coordinate for point 2.
-
y2 -
y-coordinate for point 2.
-
color -
The fill color. A color identifier created with imagecolorallocate().
Return Values
Returns TRUE on success or FALSE on failure.
Examples
Example #1 imagefilledrectangle() usage
<?php
// Create a 55x30 image
$im = imagecreatetruecolor(55, 30);
$white = imagecolorallocate($im, 255, 255, 255);
// Draw a white rectangle
imagefilledrectangle($im, 4, 4, 50, 25, $white);
// Save the image
imagepng($im, './imagefilledrectangle.png');
imagedestroy($im);
?>
The above example will output something similar to:
olivier dot pons at google dot mail dot com ¶
10 months ago
Tobi ¶
2 years ago
It looks like there are waves beetween the points, but it's straight.
<?php
$maxwert = 300;
$size = 10;
$img = imagecreatetruecolor($maxwert, $maxwert);
imagecolorallocate($img, 0, 0, 0);
for($y=0;$y<$maxwert;$y += $size){
for($x=0;$x<$maxwert;$x+=$size){
$r = rand(0,255);
$g = rand(0,255);
$b = rand(0,255);
$color = imagecolorallocate($img, $r, $g, $b);
imagefilledrectangle ($img, $x, $y, $x+$size ,$y+$size, $color);
}
}
header("Content-type: image/png");
imagepng($img);
?>
Mice32 ¶
3 years ago
That script draws Serpinski's carpet:
<?php
set_time_limit(5);
$i = 4; // Iterations
$xy = 500; // Picture size
$img = imagecreatetruecolor($xy, $xy);
$white = imagecolorallocate($img, 255, 255, 255);
drawCarpet(0, 0, $xy, $xy, $i);
function drawCarpet($a, $b, $c, $d, $n) {
global $img, $white;
if($n <= 0) return;
$a1 = 2 * $a / 3 + $c / 3;
$c1 = $a / 3 + 2 * $c / 3;
$b1 = 2 * $b / 3 + $d / 3;
$d1 = $b / 3 + 2 * $d / 3;
imagefilledrectangle($img, $a1, $b1, $c1, $d1, $white);
drawCarpet($a, $b, $a1, $b1, $n - 1);
drawCarpet($a1, $b, $c1, $b1, $n - 1);
drawCarpet($c1, $b, $c, $b1, $n - 1);
drawCarpet($c1, $b, $c, $b1, $n - 1);
drawCarpet($a, $b1, $a1, $d1, $n - 1);
drawCarpet($c1, $b1, $c, $d1, $n - 1);
drawCarpet($a, $d1, $a1, $d, $n - 1);
drawCarpet($a1, $d1, $c1, $d, $n - 1);
drawCarpet($c1, $d1, $c, $d, $n - 1);
}
header('Content-Type: image/png');
imagepng($img);
?>
mike at delenk dot net ¶
5 years ago
The examples in function imagettfbbox() gave me many problems because of misunderstand of how the text is positionned in the box.
So I did a new example:
- writing a text
- in the correct position in its box
- with a padding around
Enjoy !
Mike
<?
// some settings
$angle = 0;
$text = 'Ühg 0123456789';
$font_face = dirname(__FILE__).'/verdana.ttf'; // put the file in the same directory
$font_size = 9; //(int) pixels in GD 1, or points in GD 2
// retrieves box frame
$box = imagettfbbox($font_size, 0, $font_face, $text);
$bottom_left_x = $box[0]; // used below
$bottom_left_y = $box[1]; // used below
$bottom_right_x = $box[2]; // used below
$bottom_right_y = $box[3];
$top_right_x = $box[4];
$top_right_y = $box[5];
$top_left_x = $box[6];
$top_left_y = $box[7]; // used below
// define width and height of the text box
$box_w = abs($bottom_left_x) + abs($bottom_right_x);
$box_h = abs($bottom_left_y) + abs($top_left_y);
// add padding
$padding_x = 5;
$padding_y = 5;
$box_w = $box_w + 2 * $padding_x;
$box_h = $box_h + 2 * $padding_y;
// origin of the text = baseline of the first char
$text_x = abs($bottom_left_x) -1 + $padding_x;
$text_y = $box_h -1 - abs($bottom_left_y) - $padding_y;
// mysterious correction for the characters going low like pgjq
if(abs($bottom_left_y) <= 1) $box_h--;
// create the image
$img = imagecreatetruecolor($box_w, $box_h);
// define some colors
$white = imagecolorallocate($img,255,255,255);
$black = imagecolorallocate($img,0,0,0);
$lightgrey = imagecolorallocate($img, 200, 200, 200);
$grey = imagecolorallocate($img,100,100,100);
$yellow = imagecolorallocate($img, 0xFF, 0xFF, 0x00);
// attribute colors
$font_color = $black;
$padding_color = $lightgrey;
$background_color = $yellow;
// fill image with background color
imagefill($img, 0, 0, $background_color);
// fill image with padding color
imagefilledrectangle($img, 0, 0, $box_w, $padding_y - 1, $padding_color); // top
imagefilledrectangle($img, 0, 0, $padding_x - 1, $box_h - 1, $padding_color); // left
imagefilledrectangle($img, 0, $box_h - $padding_y -1, $box_w, $box_h - 1, $padding_color); // bottom
imagefilledrectangle($img, $box_w - $padding_x, 0, $box_w - 1, $box_h - 1, $padding_color); // right
//write text
imagettftext($img, $font_size, 0, $text_x, $text_y, $font_color, $font_face, $text);
//rotate image
if ($angle > 0) $img = imagerotate($img, $angle, $white);
// send header
header("Content-type: image/gif");
//sends image
imagegif($img);
imagedestroy($img);
?>
Google ¶
6 years ago
<?php
//index.php
//set your year, month, daym hour, minute, second you want to cuuntdown to.
//ONLY CHANGE FROM HERE
$year="2006";
$month="12";
$day="25";
$hour="00";
$minute="00";
$second="00";
$event="Christmas Day 2006";
$time=mktime($hour, $minute, $second, $month, $day, $year);
$timecurrent=date('U');
$cdtime=$time-$timecurrent;
$cdmonths=$cddays/30;
$cdyears=$cddays/365;
//Used this case only...
$cdminutes=round($cdtime/60);
//cdtime is seconds
$cdhours=round($cdtime/3600);
$cddays=round($cdhours/24);
//String the date
$currentdate = date('l, F j, Y');
// Set the content-type
header("Content-type: image/png");
// Create the image
$im = imagecreatetruecolor(701, 355);
//Temp BGCOLOR (center of c-finder)
$bg1 = 208;
$bg2 = 130;
$bg3 = 208;
$s1 = $bg1 - 20;
$s2 = $bg2 - 20;
$s3 = $bg3 - 20;
$t1 = $bg1 + 30;
$t2 = $bg2 + 30;
$t3 = $bg3 + 30;
$cArray=array();
$c1 = imagecolorallocate($im, $bg1, $bg2, $bg3); //Background
$c8 = imagecolorallocate($im, 255, $bg2, 255); //Background
$c2 = imagecolorallocate($im, $s1, $s2, $s3); //Shadow
$c3 = imagecolorallocate($im, $t1, $t2, $t3); //Text
imagefilledrectangle($im, 0, 0, 701, 50, $c1);
imagefilledrectangle($im, 0, 0, 701, 50, $c8);
// The text to draw
$text = $string;
// Replace path by your own font path
$fnum = rand(1, 9);
$font = "/f/font ($fnum)";
// Add some shadow to the text
imagettftext($im, 29, 1, 17, 42, $c2, $font, "Today is:");
imagettftext($im, 28, -1, 15, 40, $c3, $font, "Today is:");
imagettftext($im, 29, 1, 17, 92, $c2, $font, "...$currentdate...");
imagettftext($im, 28, -1, 15, 90, $c3, $font, "...$currentdate...");
imagettftext($im, 29, 1, 17, 142, $c2, $font, "So there are exactly:");
imagettftext($im, 28, -1, 15, 140, $c3, $font, "So there are exactly:");
imagettftext($im, 29, 1, 17, 192, $c2, $font, "$cddays with just...");
imagettftext($im, 28, -1, 15, 190, $c3, $font, "$cddays days with just...");
imagettftext($im, 29, 1, 17, 242, $c2, $font, "$cdminutes minutes and only...");
imagettftext($im, 28, -1, 15, 240, $c3, $font, "$cdminutes minutes and only...");
imagettftext($im, 29, 1, 17, 292, $c2, $font, "$cdseconds seconds until...");
imagettftext($im, 28, -1, 15, 290, $c3, $font, "$cdseconds seconds until...");
imagettftext($im, 29, 1, 17, 342, $c2, $font, "- + $event + -");
imagettftext($im, 28, -1, 15, 340, $c3, $font, "- + $event + -");
// Using imagepng() results in clearer text compared with imagejpeg()
imagepng($im);
imagedestroy($im);
?>
info at 555webdesign dot com ¶
6 years ago
Thanks terereese. it took me over two hours to figure that one out.
it worked locally: imagefilledrectangle(imagresource, int x1, int x2, int y1, inty2, color)
BUT remote on my provider only this worked: imagefilledrectangle(imagresource, int x1, int y2, int x1, inty1, color)
Any ideas why and where?
terereese at hotmail dot com ¶
6 years ago
I would like to inform developers about a problem I encountered when trying to use imagefilledrectangle.
I noted that the order in which the start and end y coordinates are listed is extremely important.
as in the statements below.
if($this->d_values[$i]['unit_value'] < 0)
imagefilledrectangle($this->img,$position_x, $start_y , $end_x, $end_y ,$d_color);
else
imagefilledrectangle($this->img, $position_x,$ end_y , $end_x, $start_y,$d_colour);
Thanks
administrador(ensaimada)sphoera(punt)com ¶
7 years ago
I've made a function to make full color gradients:
<?php
// The image must be in truecolor mode!!
function gradient_region($img, $x, $y, $width, $height,$src_color, $dest_color=0){
$src_alpha = ($src_color) >> 24;
$src_red = ($src_color & 0xFF0000) >> 16;
$src_green = ($src_color & 0x00FF00) >> 8;
$src_blue = ($src_color & 0x0000FF);
$dest_alpha = ($dest_color) >> 24;
$dest_red = ($dest_color & 0xFF0000) >> 16;
$dest_green = ($dest_color & 0x00FF00) >> 8;
$dest_blue = ($dest_color & 0x0000FF);
$inc_alpha = ($dest_alpha - $src_alpha) / $width;
$inc_red = ($dest_red - $src_red)/$width;
$inc_green = ($dest_green - $src_green)/$width;
$inc_blue = ($dest_blue - $src_blue)/$width;
// If you need more performance, the step can be increased
for ($i=0;$i<$width;$i++){
$src_alpha += $inc_alpha;
$src_blue += $inc_blue;
$src_green += $inc_green;
$src_red += $inc_red;
imagefilledrectangle($img,
$x+$i,$y,
$x+$i,$y+$height,
imagecolorallocatealpha($img,
$src_red,$src_green,$src_blue,$src_alpha));
}
}
?>
More functions at http://www.sphoera.com
me [a.t.] forestfactory [d.o.t.] de ¶
7 years ago
As of PHP 5, it seems to be no longer necessary to draw the rectangle from the upper left to the lower right corner. This led me into big trouble porting a script developed under PHP 5 to PHP 4.
michal dot kocarek at seznam dot cz ¶
9 years ago
If you want to draw a rectangle with rounded corners, you can use this simple function...
Rectangle starts at x1y1 and ends at x2y2. $radius defines radius of circled corner.
<?
function ImageRectangleWithRoundedCorners(&$im, $x1, $y1, $x2, $y2, $radius, $color) {
// draw rectangle without corners
imagefilledrectangle($im, $x1+$radius, $y1, $x2-$radius, $y2, $color);
imagefilledrectangle($im, $x1, $y1+$radius, $x2, $y2-$radius, $color);
// draw circled corners
imagefilledellipse($im, $x1+$radius, $y1+$radius, $radius*2, $radius*2, $color);
imagefilledellipse($im, $x2-$radius, $y1+$radius, $radius*2, $radius*2, $color);
imagefilledellipse($im, $x1+$radius, $y2-$radius, $radius*2, $radius*2, $color);
imagefilledellipse($im, $x2-$radius, $y2-$radius, $radius*2, $radius*2, $color);
}
?>
sdonie at lgc dot com ¶
9 years ago
I made some simple additions to the 'ratings bar' example above to allow for different sizes. It also doesn't assume that global GET variables is turned on, and explicitly looks for parameters it needs.
----
<?php
// copied from the PHP manual:
// http://us3.php.net/manual/en/function.imagefilledrectangle.php
//this needs to reside in its own php page
//you can include that php page in your html as you would an image:
//<IMG SRC="makebar.php?rating=25.2&width=200&height=20" border="0">
// rating is a percentage from 0 to 100.
function drawRating($rating) {
$width = $_GET['width'];
$height = $_GET['height'];
if ($width == 0) {
$width = 102;
}
if ($height == 0) {
$height = 10;
}
$rating = $_GET['rating'];
$ratingbar = (($rating/100)*$width)-2;
$image = imagecreate($width,$height);
//colors
$back = ImageColorAllocate($image,255,255,255);
$border = ImageColorAllocate($image,0,0,0);
$red = ImageColorAllocate($image,255,60,75);
$fill = ImageColorAllocate($image,44,81,150);
ImageFilledRectangle($image,0,0,$width-1,$height-1,$back);
ImageFilledRectangle($image,1,1,$ratingbar,$height-1,$fill);
ImageRectangle($image,0,0,$width-1,$height-1,$border);
imagePNG($image);
imagedestroy($image);
}
Header("Content-type: image/png");
drawRating($rating);
?>
booga ¶
9 years ago
a simple way of using imagerectangle to create a percentage bar
<?php
//this needs to reside in its own php page
//you can include that php page in your html as you would an image:
//<IMG SRC="ratingpng.php?rating=25.2" border="0">
function drawRating($rating) {
$image = imagecreate(102,10);
$back = ImageColorAllocate($image,255,255,255);
$border = ImageColorAllocate($image,0,0,0);
$red = ImageColorAllocate($image,255,60,75);
$fill = ImageColorAllocate($image,44,81,150);
ImageFilledRectangle($image,0,0,101,9,$back);
ImageFilledRectangle($image,1,1,$rating,9,$fill);
ImageRectangle($image,0,0,101,9,$border);
imagePNG($image);
imagedestroy($image);
}
Header("Content-type: image/png");
drawRating($rating);
?>
ivank at 2xtreme dot net ¶
11 years ago
As stated above, it needs to go from the top left corner to the bottom right corner. Just use this to flip it if neccessary:
// flip them if neccessary (x3, y3 are temp vars)
if($x1 > $x2) { $x3 = $x2; $x2 = $x1; $x1 = $x3; }
if($y1 > $y2) { $y3 = $y2; $y2 = $y1; $y1 = $y3; }
ImageFilledRectangle($im, $x1, $y1, $x2, $y2, $color);
saramg at uclink dot berkeley dot edu ¶
11 years ago
Important quirk to note:
While imagerectangle will allow you to use a different order of your coordinates (such as bottom-left to upper-right), imagefilledrectangle will only work correctly if you use top-left to bottom-right as indicated in the docs.
kyperkins at shadowdev dot com ¶
5 years ago
This is a very simple Progress Bar using basic PHP 5.
<?php
#Created by Kyle "KP" Perkins
# of Shadow Development Technologies (http://shadowdev.com)
# on 20080204
#very simple and flexible dynamic PROGRESS BAR
#Used under the Creative Commons Share-Alike License 3.0
#http://creativecommons.org/licenses/by-sa/3.0/us/
#use: index.php?percent/total/width(px)
#example: ?s=85/100/300
#edit how you like, comments to kyperkins@shadowdev.com
header("Content-type: image/png");
extract($_GET);
$num=explode("/", $s);
$width=$num[2];
$per=($num[0]/$num[1]) * 100;
$percent=round($per, 0);
$im = @imagecreate($width, 20)
or die("Cannot Initialize new GD image stream");
$background_color = imagecolorallocate($im, 200,200,200);
$text_color = imagecolorallocate($im, 255, 255, 255);
$fill=($percent/100)*$width;
$offset=($width/2)-($width*.02);
imagestring($im, 3, $offset, 5, "$percent%", $text_color);
imagefilledrectangle($im, 0, 0, $fill, 20, imagecolorallocate($im, 0, 0, 255));
imagestring($im, 3, $offset, 5, "$percent%", $text_color);
imagepng($im);
imagedestroy($im);
?>
spam at junk dot dk ¶
7 years ago
A different kind of rating bar, using michal's rounded corners function :) I saw this type of rating bar somewhere and thought it looked cool, so the 'design' is a complete ripoff.
Also, note that it scales quite well, from tiny 3x3 pixel dots to huge 300x300 pixel blocks. (Man am I proud of this thing.. well, enjoy!)
/Scarpia
<?php
Header("Content-type: image/png");
drawRatingBlocks($rating);
function drawRatingBlocks($rating) {
$rating = $_GET['rating'];
$width = $_GET['width'];
$height = $_GET['height'];
$blocks = $_GET['blocks'];
if ($width == 0) $width = 130;
if ($height == 0) $height = 13;
$spacing = max(1, floor($height/6) );
if ($blocks == 0) $blocks = floor( $width / ($height-2 + $spacing) );
$blockwidth = floor( $width / $blocks ) - $spacing;
$short_side = min($height-2, $blockwidth);
$blockvalue = 100 / $blocks;
$image = ImageCreate($width,$height);
$img2 = ImageCreate($width,$height);
// Define base colors
$back = ImageColorAllocate($image,255,255,255);
$blur = ImageColorAllocate($image,230,223,188);
$fill = ImageColorAllocate($image,188,182,133);
$lightblur = ImageColorAllocate($image,238,235,216); // Would be nice to calculate these dynamically instead
$lightfill = ImageColorAllocate($image,221,217,193); // Would be nice to calculate these dynamically instead
ImagePaletteCopy($img2,$image);
ImageFilledRectangle($image,0,0,$width-1,$height-1,$back);
ImageFilledRectangle($img2,0,0,$width-1,$height-1,$back);
if ($short_side < 25)
$radius = 1;
else if ($short_side < 40)
$radius = 3;
else if ($short_side < 50)
$radius = 5;
else
$radius = floor($height/10);
for($i=0;$i<$blocks;$i++) {
$startX = ($blockwidth+$spacing)*$i + 1;
if ((9 <= $short_side) && ($short_side <= 16))
{
ImageFilledRectangle($image, $startX, 1, $startX+$blockwidth-1, $height-2, $lightblur);
ImageFilledRectangle($img2, $startX, 1, $startX+$blockwidth-1, $height-2, $lightfill);
}
ImageRectangleWithRoundedCorners($image, $startX, 1, $startX+$blockwidth-1, $height-2, $radius, $blur);
ImageRectangleWithRoundedCorners($img2, $startX, 1, $startX+$blockwidth-1, $height-2, $radius, $fill);
}
$barwidth = ($rating/100)*$blocks*$blockwidth;
$barwidth += floor($barwidth/$blockwidth)*$spacing+1;
ImageCopy( $image, $img2, 0, 0, 0, 0, $barwidth, $height );
ImageDestroy($img2);
ImagePNG($image);
ImageDestroy($image);
}
function ImageRectangleWithRoundedCorners(&$im, $x1, $y1, $x2, $y2, $radius, $color)
{
// Draw rectangle without corners
ImageFilledRectangle($im, $x1+$radius, $y1, $x2-$radius, $y2, $color);
ImageFilledRectangle($im, $x1, $y1+$radius, $x2, $y2-$radius, $color);
// Draw circled corners
ImageFilledEllipse($im, $x1+$radius, $y1+$radius, $radius*2, $radius*2, $color);
ImageFilledEllipse($im, $x2-$radius, $y1+$radius, $radius*2, $radius*2, $color);
ImageFilledEllipse($im, $x1+$radius, $y2-$radius, $radius*2, $radius*2, $color);
ImageFilledEllipse($im, $x2-$radius, $y2-$radius, $radius*2, $radius*2, $color);
}
?>
