gdlib

来源： https://stackoverflow.com/questions/26905271/how-to-give-border-to-text-in-php-gd-library

来源： https://stackoverflow.com/questions/26905271/how-to-give-border-to-text-in-php-gd-library

来源： https://stackoverflow.com/questions/60609181/normalize-css-filters-with-gd-lib-filters

问题 I am taking a PNG image from a url as below. I want to convert the PNG image to JPEG without saving disk with PHP. Finally I want to assign JPEG image to $content_jpg variable. $url = 'http://www.example.com/image.png'; $content_png = file_get_contents($url); $content_jpg=; 回答1: You want to use the gd library for this. Here's an example which will take a png image and output a jpeg one. If the image is transparent, the transparency will be rendered as white instead. <?php $file = "myimage.png

问题 This is my php class to merge to images mergepic.php class mergepic{ public function merge_barchart_drawing($object,$obj) { $src = imagecreatefrompng($obj->barchart()); $dest = imagecreatefrompng($object->drawing()); //$src = imagecreatefrompng('http://localhost/graph/barchart.php?barchart='.$_GET['barchart'].'&max='.$_GET['max'].'&digit='.$_GET['digit']); //$dest = imagecreatefrompng('http://localhost/graph/drawing.php?drawings='.$_GET['drawings'].'&max='.$_GET['max'].'&digit='.$_GET['digit'

问题 Before attempting to resize an image in PHP using libGD, I'd like to check if there's enough memory available to do the operation, because an "out of memory" completely kills the PHP process and can't be catched. My idea was that I'd need 4 byte of memory for each pixel (RGBA) in the original and in the new image: // check available memory if(!is_mem_available(($from_w * $from_h * 4) + ($to_w * $to_h * 4))){ return false; } Tests showed that this much more memory than the library really seem

问题 I've got the code below to pull hex values from a database and create an image of that colour. There's over a thousand values, so it's looping to create an image for them all. It seems to work fine except it just keeps overwriting the first image (0.jpg) instead of creating new ones 0.jpg, 1.jpg 2.jpg etc. Any idea where I'm going wrong? Oh yeah, I'm converting the hex to rgb in there too, that works fine. <?php require ('connect.php'); $sql = mysql_query("SELECT * FROM hex") or die(mysql

问题 I'm trying to take a screenshot of full screen and save it as a png. I found a code here and modified it a bit. For the screenshot I use openGL and Glut and for the saving in png the gd library for c. All I'm getting is a black png and I can't figure out why. I searched in stackoverflow and found some posts, but unfortunately they didn't help. One of them was to use glReadBuffer( GL_FRONT); instead of glReadBuffer(GL_BACK); I tryed with both of them with no success. Here is my code: int

问题 Does anybody know of a good way to do face detection in PHP? I came across some code here that claims to do this, but I can't seem to get it to work properly. I'd like to make this work (even though it will be slow) and any help you can give me would be really appreciated. Here's the code from the link: <?php // as published by the Free Software Foundation; either version 2 // of the License, or (at your option) any later version. // // This program is distributed in the hope that it will be

问题 Does anybody know of a good way to do face detection in PHP? I came across some code here that claims to do this, but I can't seem to get it to work properly. I'd like to make this work (even though it will be slow) and any help you can give me would be really appreciated. Here's the code from the link: <?php // as published by the Free Software Foundation; either version 2 // of the License, or (at your option) any later version. // // This program is distributed in the hope that it will be