I'm am trying to add a 50px white margin down the right side of an image by creating an empty image that's 50px wider than the source image and then merging the source image onto it. The problem is that the source image just gets stretched sideways so it's 50px wider!
Maybe I'm using the wrong function to merge the images ...
here's my code
$destImage = $filepath;
#echo "dest image = ".$destImage;
$sourceImage = imagecreatefrompng($filepath);
// dimensions
$src_wide = imagesx($sourceImage);
echo "src_wide=".$src_wide;
$src_high = imagesy($sourceImage);
// new image dimensions with right padding
$dst_wide = $src_wide+50;
echo "dst_wide=".$dst_wide;
$dst_high = $src_high;
// New resource image at new size
$dst = imagecreatetruecolor($dst_wide, $dst_high);
// set white padding color
$clear = array('red'=>255,'green'=>255,'blue'=>255);
// fill the image with the white padding color
$clear = imagecolorallocate( $dst, $clear["red"], $clear["green"], $clear["blue"]);
imagefill($dst, 0, 0, $clear);
// copy the original image on top of the new one
imagecopymerge($dst,$sourceImage,0,0,0,0,$src_wide,$src_high, 100);
imagepng($dst,$destImage,6);
imagedestroy($dst);
chmod($destImage,0775);
what am I doing wrong here ??
thanks
It's stretching because you are copying it to the full width of the destination image. Instead use
imagecopyresampled($dst,$sourceImage,50,0,0,0,$src_wide,$src_high,$src_wide,$src_high);
Related
I’m creating an uploader that can upload jpg, giff and png images. Then converts them all too transparent PNG’s and then crops the image based on crop parameters send from client side. The crop can even supply negative axis coordinates, meaning the image is being cropped beyond image dimensions.
To ensure all supported formats can have transparency I first recreate the image into a transparent png, and this is working well.
//GET WIDTH AND HIEGHT OF UPLOADED JPG
list($imageWidth,$imageHeight)= getimagesize($originalDirectory.$file_name);
$image = imagecreatefromjpeg($originalDirectory.$file_name);
//CREATE NEW IMAGE BASED ON WIDTH AND HEIGHT OF SROUCE IMAGE
$bg = imagecreatetruecolor($imageWidth, $imageHeight);
//TRANSPARENCY SETTINGS FOR BOTH DESTINATION AND SOURCE IMAGES
$transparent2 = imagecolorallocatealpha($bg, 0, 0, 0, 127);
$transparent = imagecolorallocatealpha($image, 0,128,255,50); //ONLY TO ENSURE TRANSPARENCY IS WORKING
//SAVE TRANSPARENCY AMD FILL DESTINATION IMAGE
imagealphablending( $bg, false );
imagesavealpha($bg, true);
imagefill($bg, 0, 0, $transparent2);
//SAVE TRANSPARENCY AMD FILL SOURCE IMAGE
imagealphablending( $image, false );
imagesavealpha($image, true);
imagefill($image, 0, 0, $transparent); //ONLY TO ENSURE TRANSPARENCY IS WORKING
//CREATE AND SAVE AS PNG FILE WITH TRANSPARENCY
imagecopy($bg, $image, 0, 0, 0, 0, $imageWidth,$imageHeight);
header('Content-type: image/png');
imagepng($bg, $originalDirectory.$jpgFile);
imagedestroy($bg);
After the new png is created I use it to then only crop the image according to the parameters passed through from the client side scripting.
//GET NEWLY CREATED PNG
$src = imagecreatefrompng($originalSRC);
// NOT SURE IF NECESSARY BUT HAS NO EFFECT ON FINAL RESULT REGGARDLESS OF ANY SETTINGS DONE
imagealphablending( $image, false );
imagesavealpha($image, true);
//DEFINE DESTINATION CROPPED FILE
$thumbHighFilename = $thumbHighDirectory.'test.png';
//CREATE NEW IMAGE BASED ON FINAL CROP SIZE
$tmp = imagecreatetruecolor($cropWidth, $cropHeight);
//ENSURE DESTINATION HAS TRANSPARENT BACKGROUND
$transparent2 = imagecolorallocatealpha($tmp, 0, 0, 0, 127);
imagealphablending( $tmp, false );
imagesavealpha($tmp, true);
imagefill($tmp, 0, 0, $transparent2);
/* -------------------------------------------------
PROBLEM HERE
When I try to merge the two with the crop paramaters
send from client side. All transparencies work, except
where crop X and Y axis exceeds source image paramaters.
Currently 50px offset on destination image is to verify
transparency works.
The source coordinates are based on image not crop area.
Tried with both imagecopyresized & imagecopyresampled
-------------------------------------------------*/
imagecopyresized($tmp, $src, -50,-50, $xAxis,$yAxis,$cropWidth, $cropHeight, $pW, $pH);
//SAVE FINAL IMAGE
header('Content-type: image/png');
imagepng($tmp, $thumbHighFilename);
imagedestroy($tmp);
This is where the source and destination images still has there transparency; however the negative coordinates creates a black background around the source image. How can I get that to be transparent?
While I found a lot about transparencies, nothing has been a proper solution. For example imagefill afterwards will not work as source could use 100% black around the edges and will make that also transparent then, which it shouldn’t.
CLIENT SIDE CROP EXAMPLE WITH INDICATIONS
CURRENT FINAL IMAGE RESULT WITH ADDED INDICATIONS
From what I could find it seems that there is no way for the GD imagecopyresized and imagecopyresampled to inherit the default backgrounds of the images it is cropping. Thus it keeps adding the default black background to the source image.
The biggest problem I’ve had was actually the crop container being responsive, thus very difficult to determine crop parameters.
To get around the problem I asked my frontend developer to send me more parameters from the crop. Below are all parameters now being passed to php, and the variables in php that are linked to the parameters received:
$xAxisCropper & $yAxisCropper – The variables get the X and Y
coordinates of the container not the image being cropped.
$pW & $pH – Defines the width and height of the crop box.
$containerWidth & $containerheight – As the container is responsive
getting the height and width helps understand what size the
coordinates where calculated on.
$imResizeHeight & $imResizeWidth – Since the images in the container
are always set to be contained within the container, it was important
to get the width and height into which the image is being resized by
the CSS. Giving understanding of what is happening with the image
within the responsive container.
$originalWidth & $originalHeight – Defines the original size of the
image and could either be passed to php or retrieved from the
original image uploaded to the server.
With these parameters I could now recreate the container with the image in the centre, and crop the newly created image. Before I crop it’s important to get the right scaling of the image for the crop, in order to ensure the best quality image is cropped and not compressed before cropping.
To do this I started by determining if the image in the container is being scaled up or down within the container. If scaled up image needs to be scaled to container size, if scaled down the container needs to be increased to have the image fit in the container. Below is the code that currently determines this, and changes the necessary parameters accordingly:
//IF CSS CONTAIN RESIZES HEIGHT EQUAL TO CROP CONTAINER HEIGHT
if($imResizeHeight == $containerheight){
//IF IMAGE SIZE WAS INCREASED
if($imResizeHeight>$originalHeight){
//DEFINE NEW IMAGE SIZE TO SCALE TO CONTAINER
$new_height = $imResizeHeight;
$new_width = $originalWidth * ($new_height / $originalHeight);
$scale = 'image'; //DEFINE WHAT IS BEING INCREASED
//ESLSE INCREASE CONTAINER TO IMAGE HEIGHT DIMENSIONS
}else{
//RECALCULATE WIDTH & HEIGHT OF CONTAINER
$newContainerWidth = $containerWidth * ($originalHeight / $containerheight);
$newContainerheight = $originalHeight;
$scale = 'container'; //DEFINE WHAT IS BEING INCREASED
}
//IF CSS CONTAIN RESIZES WIDTH EQUAL TO CROP CONTAINER WIDTH
}elseif($imResizeWidth == $containerWidth) {
//IF IMAGE SIZE WAS INCREASED
if($imResizeWidth>$originalWidth){
//DEFINE NEW IMAGE SIZE TO SCALE TO CONTAINER
$new_width = $imResizeWidth;
$new_height = $originalHeight * ($new_width / $originalWidth);
$scale = 'image'; //DEFINE WHAT IS BEING INCREASED
//ESLSE INCREASE CONTAINER TO IMAGE WIDTH DIMENSIONS
}else{
//RECALCULATE WIDTH & HEIGHT OF CONTAINER
$newContainerheight = $containerheight * ($originalWidth / $containerWidth);
$newContainerWidth = $originalWidth;
$scale = 'container'; //DEFINE WHAT IS BEING INCREASED
}
}
//IF IMAGE WAS INCREASED
if($scale=='image'){
//SCALE IMAGE
$src = imagescale ( $src , $new_width , $new_height, IMG_BILINEAR_FIXED);
imagepng($src,$originalSRC,0);
//ADD CHANGES TO VARIABLES USED IN CROP
$pH = $pH * ($new_height / $originalHeight);
$pW = max(0, round($pW * ($new_width / $originalWidth)));
$originalWidth = $new_width;
$originalHeight = $new_height;
$newContainerWidth = $containerWidth;
$newContainerheight = $containerheight;
//ELSE CONTAINER WAS INCREASED
}else {
//RECALCULATE COORDINATES OF CONTAINER
$yAxisCropper = max(0, round($yAxisCropper * ($newContainerheight / $containerheight)));
$xAxisCropper = max(0, round($xAxisCropper * ($newContainerWidth / $containerWidth)));
}
Once the parameters have been redefined according to the scaling, I then create the transparent background according to the container size and add the image in the centre. Thus creating a proper version of the crop container as an image, below the code for creating the new image:
//CALCULATE CENTRE OF NEW CONTAINER
$centreX = max(0, round(($newContainerWidth-$originalWidth)/2));
$centreY = max(0, round(($newContainerheight-$originalHeight)/2));
//CREATE NEW IMAGE BASED ON WIDTH AND HEIGHT OF SROUCE IMAGE
$bg = imagecreatetruecolor($newContainerWidth, $newContainerheight);
//SAVE TRANSPARENCY AMD FILL DESTINATION IMAGE
$transparent = imagecolorallocatealpha($bg, 0,0,0,127);
imagealphablending( $bg, false);
imagesavealpha($bg, true);
imagefill($bg, 0, 0, $transparent);
//CREATE AND SAVE AS PNG FILE WITH TRANSPARENCY
imagecopy($bg, $src, $centreX, $centreY, 0, 0, $originalWidth,$originalHeight);
header('Content-type: image/png');
imagepng($bg, $originalSRC, 0);
imagedestroy($bg);
The result till thus far:
It is only at this point that I send the new image to be cropped according to the specified width and height. Code below:
$src = imagecreatefrompng($originalSRC);
$thumbHighFilename = $thumbHighDirectory.$new_image;
$tmp = imagecreatetruecolor($cropWidth, $cropHeight);
$transparent2 = imagecolorallocatealpha($tmp, 0, 0, 0, 127);
imagealphablending( $tmp, false );
imagesavealpha($tmp, true);
imagefill($tmp, 0, 0, $transparent2);
imagealphablending( $tmp, false );
imagesavealpha($tmp, true);
imagecopyresampled($tmp, $src, 0,0, $xAxisCropper,$yAxisCropper,$cropWidth, $cropHeight, $pW, $pH);
header('Content-type: image/png');
imagepng($tmp, $thumbHighFilename, 2);
Final result cropped 400x300
This has been the only way so far that I’ve managed to solve the problem. Code could probably still be optimised, but if someone has a more optimal solution please share.
I also wish to thank my frontend developer Salem for helping me to solve this irritating issue.
I also did have this annoying black Background Problem with png Files and the imagecropauto Function.
After "some" Tests, i have found a Solution as it seems. At least it works for me.
Here is my mofified Code:
$im=imagecreatefrompng("yourpicture.png");
$cropped=imagecropauto($im, IMG_CROP_SIDES);
imagesavealpha($cropped,true);
if($cropped !==false) {
imagedestroy($im);
$im=$cropped;
}
imagepng($im, "yourpicturecropped.png");
imagedestroy($im);
I'm creating a image resizing tool. The selecting etc is done with JavaScript and then the values is sent to PHP. That is working perfectly fine. But, The image is not correctly resized. The new images get the correct width/height but, the selected part of the image get's "zoomed" and more of the image compared to what's selected is returned. An example on the images below.
Image width/height before resizing
Width: 280px
Height: 210px
Resize Details
Output image
<?php
$width = 163.094;
$height = 148.5;
$new_width = 62.18745;
$new_height = 69.87505;
$dst_left = 0;
$dst_top = 0;
$src_left = 49.15625;
$src_top = 39.03125;
header('Content-Type: image/png');
// Create a empty image
$new_image = imagecreatetruecolor($new_width, $new_height);
// Set background transparent
imagefill($new_image,0,0,0x7fff0000);
// Create image
$image = imagecreatefrompng("../../uploads/img/imageNX4jDQ.png");
// Create new image
imagecopyresampled($new_image, $image, $dst_left, $dst_top, $src_left, $src_top, $new_width, $new_height, $width, $height);
// Keep transparency
imageAlphaBlending($new_image, true);
imageSaveAlpha($new_image, true);
// Output
$test = imagepng($new_image, "../../uploads/img/test.png");
$test;
?>
This diagram always helps me:
http://php.net/manual/en/function.imagecopyresampled.php#112742
That aside I would anticipate your JS passing through an original width of 62.18745, and height of 69.87505.
If you need to scale the image down after that then your new_width and height values will have to be adjusted in accordance to what you need them to be.
i just do image watermarking in php it's working but not setting image like i want,here's my code of php file.
<!DOCTYPE html>
<html>
<head>
<title>test</title>
</head>
<body>
<?php
if(isset($_POST['submit']))
{
// Give the Complete Path of the folder where you want to save the image
$folder="uploads/";
move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], "$folder".$_FILES["fileToUpload"]["name"]);
$file='uploads/'.$_FILES["fileToUpload"]["name"];
$uploadimage=$folder.$_FILES["fileToUpload"]["name"];
$newname=$_FILES["fileToUpload"]["name"];
// Set the thumbnail name
$thumbnail = $folder.$newname."_thumbnail.jpg";
$actual = $folder.$newname.".jpg";
$imgname=$newname."_thumbnail.jpg";
// Load the mian image
$source = imagecreatefromjpeg($uploadimage);
// load the image you want to you want to be watermarked
$watermark = imagecreatefrompng('uploads/logo1.png');
// get the width and height of the watermark image
$water_width = imagesx($watermark);
$water_height = imagesy($watermark);
// get the width and height of the main image image
$main_width = imagesx($source);
$main_height = imagesy($source);
// Set the dimension of the area you want to place your watermark we use 0
// from x-axis and 0 from y-axis
$dime_x = 0;
$dime_y = 0;
// copy both the images
imagecopy($source, $watermark, $dime_x, $dime_y, 0, 0, $water_width, $water_height);
// Final processing Creating The Image
imagejpeg($source, $thumbnail, 100);
}
?>
<img src='uploads/<?php echo $imgname;?>'>
</body>
</html>
and my html code also working fine.but problem with generated image it's like that
text with 'JACLIN ADMIN' is my png image and i want to apply it in middle from up and left. i just put 0 for both but problem is how can i put it in middle dynamicaly when size of images with diffrent height and width?please help me.
First, you need to find the middle point of your image:
$im_middle_w = $main_width/2;
$im_middle_h = $main_height/2;
Then you just need to add the watermark there but you need to move the watermark to the left by half (so it's actually centered):
$dime_x = $im_middle_w - $water_width/2;
$dime_y = $im_middle_h - $water_height/2;
Haven't tested it but it should work. If it doesn't work, feel free to link the images and I'll see to the code myself.
First set Value:
$watermark_pos_x = (imagesx($image)/2) - (imagesx($watermark)/2) - 15; $watermark_pos_y = (imagesy($image)/2) - (imagesy($watermark)/2) - 10;
Then after apply value on Function:
// merge the source image and the watermark
imagecopy($image, $watermark, $watermark_pos_x, $watermark_pos_y, 0, 0, imagesx($watermark), imagesy($watermark));
I'm using this jQuery plugin to crop images:
http://www.tmatthew.net/jwindowcrop
As you can see, it's really easy to use it on jQuery side, but my problem is with cropping the real image with PHP/GD.
with some goggling, I got:
$targ_w = $targ_h = 150;
$jpeg_quality = 90;
$src = 'demo_files/flowers.jpg';
$img_r = imagecreatefromjpeg($src);
$dst_r = ImageCreateTrueColor( $targ_w, $targ_h );
imagecopyresampled($dst_r,$img_r,0,0,$_POST['x'],$_POST['y'],
$targ_w,$targ_h,$_POST['w'],$_POST['h']);
header('Content-type: image/jpeg');
imagejpeg($dst_r, null, $jpeg_quality);
But it's not taking care of zoom ins/zoom outs made by the jQuery plugin, how I should crop the image and save it using this plugin and PHP?
I figured this out, here is my code in case of anyone else has the same question, the cropping will be done by Zebra image class:
http://stefangabos.ro/php-libraries/zebra-image/#documentation
PHP:
// The variables we got from the plugin in upload page:
$x = intval($_POST['x']);
$y = intval($_POST['y']);
$w = intval($_POST['w']);
$h = intval($_POST['h']);
// The img file which we want to crop
$tmp_file = 'path/to/img';
// Now include the Zebra class
include_once('path/to/Zebra_Image.php');
$image = new Zebra_Image();
$image -> preserve_aspect_ratio = true;
$image -> enlarge_smaller_images = true;
$image -> preserve_time = true;
$image -> jpeg_quality = 100;
// Now imagine that the user has selected the area which he want with the plugin, and we also want to make the image out put in a specific size(200*225):
$target_path = 'new/img/path'; // the output img path
$image -> source_path = $tmp_file;
$image -> target_path = $target_path;
$image -> crop($x, $y, $x + $w, $y + $h);
$image -> source_path = $target_path;
$image -> resize(200, 225, ZEBRA_IMAGE_CROP_CENTER);
I am also using jwindowcrop. When you click jwindowcrop's zoom, the w and h changes. (see attached picture)
You have to make sure you used the correct parameters as stated in the php manual
http://www.php.net/manual/en/function.imagecopyresampled.php
In my case, I used imagecopyresized and I could crop the image properly including the zooms
dst_image
Destination image link resource.
src_image
Source image link resource.
dst_x
x-coordinate of destination point.
(in my case the destination image should start from upper left corner)
dst_y
y-coordinate of destination point.
(in my case the destination image should start from upper left corner)
src_x
x-coordinate of source point.
(the x-coordinate returned by the cropping function e.g. crop image from x=231, 231 pixels far from the left edge)
src_y
y-coordinate of source point.
(the x-coordinate returned by the cropping function e.g. crop image from y=706, 706 pixels far from the top edge)
dst_w
Destination width.
(in my case, my new image should have a width of 800px)
dst_h
Destination height.
(in my case, my new image should have a height of 400px)
src_w
Source width.
(when my cropping function zooms, it changes the width and height of the original image)
src_h
Source height.
(when my cropping function zooms, it changes the width and height of the original image)
imagecopyresized(dst_image, src_image, 0, 0, 231, 706, 800, 400, 521, 318);
I use this code to create an image from another png image, the background is black by default. My question is how to set a transparent background?
$input = imagecreatefrompng('image.png');
$output = imagecreatetruecolor(50, 50);
imagecopy($output, $input, 4,0, 8,8, 8,8);
imagecopy... etc.
header('Content-Type: image/png');
imagepng($output);
Is there a easy way of doing this? Thanks
Sets the transparent color in the given image.
int imagecolortransparent ( resource $image [, int $color ] )
Here's the link
Since the PHP function imagecopymerge doesn't work with the Alpha channel, you'll want to use the function from the first comment on this page imagecopymerge_alpha:
http://php.net/manual/en/function.imagecopymerge.php
Just have the transparent image as the base and merge it together with the image you need.
I've tried it out and it works fine for a project of mine.
None of the solutions worked for me, it would always convert transparent pixels on the source image to black on the destination image. What worked was changing imagecopy/imagecopymerge/imagecopymerge_alpha to imagecopyresampled and just passing the same width and height twice.
//Create destination image.
$png = imagecreatetruecolor(1024, 1024);
imagealphablending($png, false);
imagesavealpha($png, true);
//Make destination image be all transparent.
$color = imagecolorallocatealpha($png, 0, 0, 0, 127); //127 means completely transparent.
imagefill($png, 0, 0, $color);
//Load source image.
$png2 = imagecreatefrompng($sourceurl);
imagealphablending($png2, false);
imagesavealpha($png2, true);
$sizex = imagesx($png2);
$sizey = imagesy($png2);
//Copy to destination and save to file.
imagecopyresampled( $png, $png2,
0, 0,
0, 0,
$sizex, $sizey,
$sizex, $sizey);
imagepng($png, "result.png");
imagealphablending($input, true);
imagesavealpha($input, true);
imagealphablending($output, true);
imagesavealpha($output, true);
Or propably
int imagesavealpha($img,true);
http://www.php.net/manual/en/function.imagesavealpha.php
Full credit goes to:
http://consistentcoder.com/combine-a-transparent-png-image-on-top-of-another-image-with-php
The following code will overlay the foreground image onto the background image while preserving the transparency of the overlay:
//set the source image (foreground)
$sourceImage = 'table.png';
//set the destination image (background)
$destImage = 'create-a-surreal-head-of-tree-photo-manipulation.jpg';
//get the size of the source image, needed for imagecopy()
list($srcWidth, $srcHeight) = getimagesize($sourceImage);
//create a new image from the source image
$src = imagecreatefrompng($sourceImage);
//create a new image from the destination image
$dest = imagecreatefromjpeg($destImage);
//set the x and y positions of the source image on top of the destination image
$src_xPosition = 75; //75 pixels from the left
$src_yPosition = 50; //50 pixels from the top
//set the x and y positions of the source image to be copied to the destination image
$src_cropXposition = 0; //do not crop at the side
$src_cropYposition = 0; //do not crop on the top
//merge the source and destination images
imagecopy($dest,$src,$src_xPosition,$src_yPosition,
$src_cropXposition,$src_cropYposition,
$srcWidth,$srcHeight);
//output the merged images to a file
/*
* '100' is an optional parameter,
* it represents the quality of the image to be created,
* if not set, the default is about '75'
*/
imagejpeg($dest,
'combine-a-transparent-png-image-on-top-of-another-image-with-php-01.jpg',
100);
//destroy the source image
imagedestroy($src);
//destroy the destination image
imagedestroy($dest);