gd

问题 Is there any way to cut any shape from square image in PHP ? Example, I have image with heart shape: Another image in same size like heart. Final image: So my question is there way in PHP to make such effect from two images, or one image ? 回答1: You basically just want to copy the opacity of the heart template into the car picture. So, at the command-line, you would do: convert motor.jpg heart.png -compose copyopacity -composite result.png And in PHP: #!/usr/local/bin/php -f <?php $template

问题 The PHP imagecolorat() function can be used to get the RGB values of an image pixel, as demonstrated in the documentation: $im = imagecreatefrompng("php.png"); $rgb = imagecolorat($im, 10, 15); $r = ($rgb >> 16) & 0xFF; $g = ($rgb >> 8) & 0xFF; $b = $rgb & 0xFF; I don't understand the last three lines at all; I know that they return the correct values, but I cannot figure out how the >> and & operators work together to do so. Could someone please explain? For reference, when $rgb = 9750526 ,

问题 I'm working on a project where I edit the pixels of a jpg in PHP using the GD library. Its very crucial and key to my project that the output from PHP retains the pixel values I set (cough-steganography-cough). This is the first time I've attempted image manipulation in PHP. I've had no problems before in my Java implementations, so I was foolish not to investigate GD's jpeg compression quality before pursuing further. It turns out that after all my effort, my code does not function the way

问题 I'm generating a barcode with PEAR::Image_Barcode which uses GD, but I need to write that barcode onto a section of a PDF and PHP/Imagick seems to be the easiest way to do that, is there any way to convert a GD image object into something Imagick can work with? 回答1: here we go: ob_start(); Image_Barcode::draw($barcode, 'upca', 'gif'); $couponBarcode = ob_get_contents(); ob_end_clean(); $second = new Imagick(); $second->readImageBlob($couponBarcode) it's writing the image to an output buffer

问题 Hi I have to flip a thumpnail image before merge it with another jpeg file. but when I rotate 45 degree using php. It shows a black background. how can I avoid that. any body can help me. 回答1: <? $image = "130.jpg"; $degrees = 25; for($i=0;$i<count($data);$i++){ $ext = ""; $extarr = ""; $extarr = explode(".", $data[$i]['name']); $ext = array_pop($extarr); if($ext == "png"){ $rotate = imagecreatefrompng("images/".$data[$i]['name']); $transColor = imagecolorallocatealpha($rotate, 255, 255, 255,

问题 I have an old code base that makes extensive use of GD (no, switching to imagemagick is not an option). It's been running for several years, through several versions. However, when I run it in my current development environment, I'm running into a mysterious gd-png error: cannot allocate image data errors when calling imagecreatefrompng() . The PNG file I'm using is the same as I've been using, so I know it works. Current setup: Ansible-provisioned vagrant box Ubuntu 14.04 PHP 5.5.9 GD 2.1.1

问题 I have been trying to troubleshoot why CPAN GD module fails to install using Cygwin for 2 days now. Any help is much appreciated. Thanks! cpan install GD Going to read '/home/xxxxxxxxxx/.cpan/Metadata' Database was generated on Sat, 27 Dec 2014 12:17:02 GMT Running install for module 'GD' Running make for L/LD/LDS/GD-2.56.tar.gz Checksum for /home/xxxxxxxxxx/.cpan/sources/authors/id/L/LD/LDS/GD-2.56.tar.gz ok CPAN.pm: Going to build L/LD/LDS/GD-2.56.tar.gz Configuring for libgd version 2.1.0.

问题 In my old PHP apps i used to run a function like the one bellow to create jpeg image thumbnails. function imageThumbanail() { $image_src = imagecreatefromjpeg('http://examplesite.com/images/sample-image.jpg'); $thumbnail_width = 180; //Desirable thumbnail width size 180px $image_width = imagesx($image_src); //Original image width size -> 1080px $image_height = imagesy($image_src); //Original image height size -> 1080px $thumbnail_height = floor( $image_height * ( $thumb_width / $image_width )

问题 So I have the image: and I want to add text under the image (make demotivational image). So I extend it height and add additional height to the bottom. What I need is write the text: Top text bottom longer text also I need these words to be centered on the image. So the ouput should be: everything is on PHP GD library. The problem is - I don't know how to calculate proportion of font size and center it. My function which is not working, calculate font size wrong and align text wrong.. private

问题 I have a script that generates some HTML for newsletters. I'm floating an image using "align=left" and wrapping text around it. I use an inline CSS style, in this case margin-right, to give the image some breathing room. Outlook ignores this. Outlook also ignores padding - I even tried a 10px border-right, it ignored that, too. I can't change the layout and put the image in a table. I am thinking of using GD to manipulate the image, adding 8px of whitespace to the right side of it. The catch