Web студия "GrandView"

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imagecopymerge

eric
10-Jul-2007 01:57


you need to stream the image out after processing ...something like



<?php



// All of your existing code



imagepng($image);



?>

Al
09-Jul-2007 07:23


Check your header... He is false... 



<?php

header("Content-Type: image/png");

?>

jay at zylex dot net dot nz
24-Feb-2007 03:45


Hi

i wrote this script to add a watermark image into the bottom right a larger image. Its very basic i know but its all i need for now. It also is an easy function for noobs to grasp. It just takes an two image types as arguments



for example 

$image = imagecreatefromjpeg("FILELOCATION");

$insert = imagecreatefrompng("WATERMARKFILELOCATION");

$image = image_overlap($image, $insert);



function image_overlap($background, $foreground){

   $insertWidth = imagesx($foreground);

   $insertHeight = imagesy($foreground);



   $imageWidth = imagesx($background);

   $imageHeight = imagesy($background);



   $overlapX = $imageWidth-$insertWidth-5;

   $overlapY = $imageHeight-$insertHeight-5;

               imagecolortransparent($foreground,

imagecolorat($foreground,0,0));                imagecopymerge($background,$foreground,

$overlapX,$overlapY,0,0,$insertWidth,$insertHeight,100);   return $background;

    }



It doesnt smooth the edges between the two images but it works easily.

jylyn at hotmail dot com
22-Feb-2006 01:49


A few corrections to the code supplied by nick at prient:



$iTemplate should be $iBackground

$iWorking should be $iSource



After fixing those two I found the script really useful, thanks!

nick at prient dot co dot uk
01-Nov-2005 02:15


Task: Rotate a large image, then reduce it in size and place it on a small background (i.e. as an Inset).



Problem: If you resize the image first, the rotation becomes hugely aliased...  So, it makes sense to rotate it first, then shrink it.

Unfortunately, when you resample the image, you lose the background color (at least, some of it may change), so you can no longer set transparancy as you require.  If instead you resize the image (rather than resample), again, the aliasing looks bad.



Solution:  Resize the background - make it bigger.  Then add the original (large) inset, and resize the whole thing back to normal.



<?php

/* We will shrink the inset to 25% */

$resizePercentage = 0.25;



/* Load a source image and a background */

$iSource = ImageCreateFromJpeg($source_file);

$iBackground = ImageCreateFromJpeg($background_file);



/* Do something here, such a rotate, skew etc */

...

/* Assume $iSource is still the image we want to insert onto the background */



/* Set the background color to be transparent */

$cBackground = ImageColorClosest($iSource, 255, 0, 255);

ImageColorTransparent($iSource, $cBackground);



/* Resize the background - make it huge */

$iBackground = ImageResize($iTemplate, ImageSX($iBackground ) / $resizePercentage, ImageSY($iBackground ) / $resizePercentage);

/* Place the image on the background - all full size, so no aliasing issues */

ImageCopyMerge($iBackground , $iSource, 

    ((ImageSX($iBackground ) - ImageSX($iSource)) / 2), 

    ((ImageSY($iBackground ) - ImageSY($iSource)) / 2) - 25, 0, 0, ImageSX($iWorking), ImageSY($iSource), 100);

/* Shrink the combined image... no issues with transparancy! */

$iBackground = ImageResize($iTemplate, ImageSX($iBackground ) * $resizePercentage, ImageSY($iBackground ) * $resizePercentage);



/* Output the image as a PNG */

header("Content-Type: image/png");

ImagePng($iBackground);

exit();



function ImageResize($pImage, $t_width, $t_height) {

  // Target image

  $iCanvas = @ImageCreateTrueColor($t_width, $t_height);

  // Source dimensions

  $s_width = ImageSX($pImage);

  $s_height = ImageSY($pImage);

  // Copy image

  ImageCopyResampled($iCanvas, $pImage, 0, 0, 0, 0, $t_width, $t_height, $s_width, $s_height);

  // Return image

  return $iCanvas;

}

?>

Ascent [at] WebAQ.com
24-May-2005 02:41


First you need make 0~9 gif format images and background image.



<?php

/*

make random image number check

20050524 by ascent WebAQ.com

*/



$rands = rand(1000,9999);



session_start();

$_SESSION['random_image_number_check'] = $rands;



$bg = './random_image_bg.jpg';

$numimgp = './random_image_number_%d.gif';



$numimg1 = sprintf($numimgp,substr($rands,0,1));

$numimg2 = sprintf($numimgp,substr($rands,1,1));

$numimg3 = sprintf($numimgp,substr($rands,2,1));

$numimg4 = sprintf($numimgp,substr($rands,3,1));

$ys1 = rand(-4,4);

$ys2 = rand(-4,4);

$ys3 = rand(-4,4);

$ys4 = rand(-4,4);



$bgImg = imageCreateFromJPEG($bg);

$nmImg1 = imageCreateFromGIF($numimg1);

$nmImg2 = imageCreateFromGIF($numimg2);

$nmImg3 = imageCreateFromGIF($numimg3);

$nmImg4 = imageCreateFromGIF($numimg4);

imageCopyMerge($bgImg, $nmImg1, 10, $ys1, 0, 0, 20, 30, 50);

imageCopyMerge($bgImg, $nmImg2, 30, $ys2, 0, 0, 20, 30, 50);

imageCopyMerge($bgImg, $nmImg3, 50, $ys3, 0, 0, 20, 30, 50);

imageCopyMerge($bgImg, $nmImg4, 70, $ys4, 0, 0, 20, 30, 50);

header("Content-type: image/jpg");

ImageJPEG($bgImg,"",100);

imagedestroy($bgImg);

imagedestroy($nmImg1);

imagedestroy($nmImg2);

imagedestroy($nmImg3);

imagedestroy($nmImg4);

?>



enjoy!

Steve
23-May-2005 11:03


Building upon backglancer's and stefan's posts below, the following script will lay a 24-bit PNG watermark over any image.



To prepare a 24-bit watermark, I recommend creating a white logo or text over a transparent background in Photoshop.  Save this as a 24-bit PNG via 'Save for the Web...'.  Be sure to set the transparency of the logo layer in Photoshop itself.  30-40% is a good setting.



Once the assets are prepared, throw the full or relative server paths at the watermark function below:



/******************************************************************/



function watermark($sourcefile, $watermarkfile) {

  

    #

    # $sourcefile = Filename of the picture to be watermarked.

    # $watermarkfile = Filename of the 24-bit PNG watermark file.

    #

    

    //Get the resource ids of the pictures

    $watermarkfile_id = imagecreatefrompng($watermarkfile);

    

    imageAlphaBlending($watermarkfile_id, false);

    imageSaveAlpha($watermarkfile_id, true);



    $fileType = strtolower(substr($sourcefile, strlen($sourcefile)-3));



    switch($fileType) {

        case('gif'):

            $sourcefile_id = imagecreatefromgif($sourcefile);

            break;

            

        case('png'):

            $sourcefile_id = imagecreatefrompng($sourcefile);

            break;

            

        default:

            $sourcefile_id = imagecreatefromjpeg($sourcefile);

    }



    //Get the sizes of both pix   

  $sourcefile_width=imageSX($sourcefile_id);

  $sourcefile_height=imageSY($sourcefile_id);

  $watermarkfile_width=imageSX($watermarkfile_id);

  $watermarkfile_height=imageSY($watermarkfile_id);



    $dest_x = ( $sourcefile_width / 2 ) - ( $watermarkfile_width / 2 );

    $dest_y = ( $sourcefile_height / 2 ) - ( $watermarkfile_height / 2 );

    

    // if a gif, we have to upsample it to a truecolor image

    if($fileType == 'gif') {

        // create an empty truecolor container

        $tempimage = imagecreatetruecolor($sourcefile_width,

                                                                            $sourcefile_height);

        

        // copy the 8-bit gif into the truecolor image

        imagecopy($tempimage, $sourcefile_id, 0, 0, 0, 0, 

                            $sourcefile_width, $sourcefile_height);

        

        // copy the source_id int

        $sourcefile_id = $tempimage;

    }



    imagecopy($sourcefile_id, $watermarkfile_id, $dest_x, $dest_y, 0, 0,

                        $watermarkfile_width, $watermarkfile_height);



    //Create a jpeg out of the modified picture

    switch($fileType) {

    

        // remember we don't need gif any more, so we use only png or jpeg.

        // See the upsaple code immediately above to see how we handle gifs

        case('png'):

            header("Content-type: image/png");

            imagepng ($sourcefile_id);

            break;

            

        default:

            header("Content-type: image/jpg");

            imagejpeg ($sourcefile_id);

    }           

  

    imagedestroy($sourcefile_id);

    imagedestroy($watermarkfile_id);

    

}

backglancer in the hotmail
17-May-2005 02:44


I was about to kill myself....

any one of you trying to merge a SEMI transparent png...

use imagecopy   :)

<?

$flag = imagecreatefrompng('flags/images/flagWhiteFill.png');

$mask = imagecreatefrompng('flags/images/flag_transparent.png');



imagealphablending($flag, 1);

imagealphablending($mask, 1);



imagecopy($flag, $mask, 0,0,0,0,25,43);



Header("Content-type: image/jpeg");

imagepng($flag);

?>



ImageSaveAlpha(resource, bool);   made the transparent color - not transparent... dunno why :)

barbarina_sv at libero dot it
17-May-2005 01:55


I needed to draw a "pointer" image over a map, but had some problems with png image transparency.

So I created a png image with white background (not transparent) and merged it on my map, after defining white color as transparent:



<?php



$src_file = 'source.jpg';

list($src_w, $src_h, $src_t, $src_a) = getimagesize($src_file);



$ptr_file = 'pointer.png'; // must have no transparency, but white background

list($ptr_w, $ptr_h, $ptr_t, $ptr_a) = getimagesize($ptr_file);



// destination image dimensions:

$dst_w = 400;

$dst_h = 200;



// pointer position:

$ptr_x = 195;

$ptr_y = 70;



$srcImage = imageCreateFromJpeg($src_file) or die ('failed imageCreateFromJpg'); 

$dstImage = imageCreateTrueColor($dst_w, $dst_h) or die ('failed imageCreateTrueColor'); 



imageCopyResampled($dstImage, $srcImage, 0, 0, 0, 0, $dst_w, $dst_h, $src_w, $src_h) or die ('failed imageCopyResampled'); 



$ptrImage = imageCreateFromPng($ptr_file) or die ('failed imageCreateFromPng'); 



$ptr_white = imageColorAllocate($ptrImage,255,255,255);

imageColorTransparent($ptrImage,$ptr_white);



imageCopyMerge($dstImage, $ptrImage, $ptr_x, $ptr_y, 0, 0, $ptr_w, $ptr_h, 100) or die ('failed imageCopyMerge');



imageJpeg($dstImage,'',100) or die ('failed imageJpeg');



imageDestroy($srcImage) or die ('failed imageDestroy(1)');

imageDestroy($dstImage) or die ('failed imageDestroy(2)');

imageDestroy($ptrImage) or die ('failed imageDestroy(3)');



?>

ingrid
04-Apr-2005 02:16


I found on the internet about a thousand copies of this "imageCopyMerge" script of Stefan. 



Most of them had a  copyright notice of the copyist added, but none of them had added what a starting user of PHP scripting really needs: The lines to be used in a HTML page, where the result of the script will be visible:



<?php

$sourcefile = "ORIGFILE.jpg";

$insertfile = "watermark.jpg";

$targetfile = "foto.jpg";

$transition = 30;

$pos=7;

require("watermark.php");

mergePix($sourcefile, $insertfile, $targetfile, $pos, $transition);

echo "<img src=\"$targetfile\">";

?> 



I was so lucky to get these lines from someone on the internet, after I posted my question all over the world. 

Most other people that replied, referred to the bookstore. But I had first read halve the (this) PHP manual, and had not found it. 



Just a suggestion, but I know it will help many people getting started with PHP: When you put your scripts here, why not add those few lines needed to incorporate it into a HTML page?

jtacon at php dot net
14-Dec-2004 05:36


This example shows how to use imageCopyMerge to create a water mark function with four random positions (the corners).



<?php

function waterMark($fileInHD, $wmFile, $transparency = 50, $jpegQuality = 90, $margin = 5) {



 $wmImg   = imageCreateFromGIF($wmFile);

 $jpegImg = imageCreateFromJPEG($fileInHD);



 // Water mark random position

 $wmX = (bool)rand(0,1) ? $margin : (imageSX($jpegImg) - imageSX($wmImg)) - $margin;

 $wmY = (bool)rand(0,1) ? $margin : (imageSY($jpegImg) - imageSY($wmImg)) - $margin;



 // Water mark process

 imageCopyMerge($jpegImg, $wmImg, $wmX, $wmY, 0, 0, imageSX($wmImg), imageSY($wmImg), $transparency);



 // Overwriting image

 ImageJPEG($jpegImg, $fileInHD, $jpegQuality);

}



waterMark('myImage.jpg','waterMark.gif');



?>



HTH.



Javier Tac

imagecopymerge

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