gd

I've coded a function that crops an image to a given aspect ratio and finally then resizes it and outputs it as JPG: <?php function Image($image, $crop = null, $size = null) { $image = ImageCreateFromString(file_get_contents($image)); if (is_resource($image) === true) { $x = 0; $y = 0; $width = imagesx($image); $height = imagesy($image); /* CROP (Aspect Ratio) Section */ if (is_null($crop) === true) { $crop = array($width, $height); } else { $crop = array_filter(explode(':', $crop)); if (empty($crop) === true) { $crop = array($width, $height); } else { if ((empty($crop[0]) === true) || (is

How do I check if an image has transparent pixels with php's GD library? It doesn't look like you can detect transparency at a glance. The comments on the imagecolorat manual page suggest that the resulting integer when working with a true-color image can actually be shifted four times total, with the fourth being the alpha channel (the other three being red, green and blue). Therefore, given any pixel location at $x and $y , you can detect alpha using: $rgba = imagecolorat($im,$x,$y); $alpha = ($rgba & 0x7F000000) >> 24; $red = ($rgba & 0xFF0000) >> 16; $green = ($rgba & 0x00FF00) >> 8; $blue

I'm resizing images with php gd. The result is image resources that i want to upload to Amazon S3. It works great if i store the images on disk first but i would like to upload them directly from memory. That is possible if i just know the bytesize of the image. Is there some way of getting the size (in bytes) of an gd image resource? You could use PHP's memory i/o stream to save the image to and subsequently get the size in bytes. What you do is: $img = imagecreatetruecolor(100,100); // do your processing here // now save file to memory imagejpeg($img, 'php://memory/temp.jpeg'); $size =

I would like to create a PHP script that convert a png file to an ico file. Is it possible to do it just with PHP ? How ? Thanks !!! The recently uploaded https://github.com/chrisbliss18/php-ico creates valid ICO files including multiple embedded resolutions from PNG files and other file formats using only PHP and the GD library. After some googling and light experimentation, it appears that an .ico file is basically a BMP with another file extension. I believe the ICO format supports more resolutions in one file, but a BMP seems to constitute a minimal ICO file. You should be able to generate

I'm trying to upload a base64 encoded image and save after decoding it. Image is getting uploaded and saved, and I can access it using a URL and everything..but the image gets rotated by 90 degrees anti-clockwise and I have no idea WHY!! The place where I get the encoded data is fine, as putting it in <img /> works fine! function saveImageData($base64Data) { $base64_decoded = base64_decode($base64Data); $im = imagecreatefromstring($base64_decoded); if ($im !== false) { $imagepath = '/public/uploads/' . time() . '.jpg'; imagejpeg($im, $imagepath); chmod($imagepath, 0755); imagedestroy($im); }

I need help with a php script. It is a CMS that has been implemented into a website. When trying to add a new product IMAGE or trying to edit current images, I am getting the following error: Fatal error: Call to undefined function imageantialias() in /home/mounts/home/m/mclh/web/admin/library/functions.php on line 233 This is my code for that area: if ($tmpDest['extension'] == "gif" || $tmpDest['extension'] == "jpg") { $destFile = substr_replace($destFile, 'jpg', -3); $dest = imagecreatetruecolor($w, $h); imageantialias($dest, TRUE); } elseif ($tmpDest['extension'] == "png") { $dest =

i am using this code to create watermark. $image = '1.jpg'; $overlay = 'stamp.png'; $opacity = "20"; if (!file_exists($image)) { die("Image does not exist."); } // Set offset from bottom-right corner $w_offset = 0; $h_offset = 100; $extension = strtolower(substr($image, strrpos($image, ".") + 1)); // Load image from file switch ($extension) { case 'jpg': $background = imagecreatefromjpeg($image); break; case 'jpeg': $background = imagecreatefromjpeg($image); break; case 'png': $background = imagecreatefrompng($image); break; case 'gif': $background = imagecreatefromgif($image); break; default: