gd

问题 I'm trying to create a thumbnail image it returned an error, that imagecopyresized() expects 2 parameter to be resource, but it can create the image but the output is only a small black image. here is my code $image = "asd.PNG"; $image_size = getimagesize($image); $image_width = $image_size[0]; $image_height = $image_size[1]; $new_size = ($image_width + $image_height)/($image_width*($image_height/45)); $new_width = $image_width * $new_size; $new_height = $image_height * $new_size; $new_image

问题 I am building a product configuration module which requires that multiple transparent PNGs of the same size (which represent product parts) be flattened onto one image. At first I tried this which made the composition of the 3 images but on a black background: <?php $x = 500; $y = 500; $final_img = imagecreatetruecolor($x, $y); $images = array('1.png', '2.png', '3.png'); foreach ($images as $image) { $image_layer = imagecreatefrompng($image); imagecopy($final_img, $image_layer, 0, 0, 0, 0, $x

问题 I am building a product configuration module which requires that multiple transparent PNGs of the same size (which represent product parts) be flattened onto one image. At first I tried this which made the composition of the 3 images but on a black background: <?php $x = 500; $y = 500; $final_img = imagecreatetruecolor($x, $y); $images = array('1.png', '2.png', '3.png'); foreach ($images as $image) { $image_layer = imagecreatefrompng($image); imagecopy($final_img, $image_layer, 0, 0, 0, 0, $x

问题 I have a function for trimming white areas around images that works something like if(imagecolorat($img, $x, $top) != 0xFFFFFF) { //sets where the top part of the image is trimmed } The problem is some images have an occasional stray pixel that is so near white that it's unnoticeable but screws up the cropping because it's not exactly 0xFFFFFF but 0xFFFEFF or something. How could I rewrite the above statement so that it evaluates true for those near white images, say down to 0xFDFDFD,

问题 I Can't figure out how to install php-gd for PHP7.2. Is there any way to install/enable GD extension in xampp windows? I checked the php.ini file for php_gd2.dll but I can't find that line. It seems like GD is missing in PHP7.2. Any suggestions?? 回答1: Under xampp/php/php.ini look for "extension=gd2" and uncomment it, I presume this what you looking for 回答2: go to php.ini file search this ;xtension=gd remove ; then 来源： https://stackoverflow.com/questions/55474258/how-to-install-enable-gd-in

问题 I having some problems with an image that has EXIF/IPTC data stored in it. When I use imageCreateFromJpeg (to rotate/crop or etc) the newly stored file doesn't preserve the EXIF/IPTC data. My current code looks like this: <?php // Before executing - EXIF/IPTC data is there (checked) $image = "/path/to/my/image.jpg"; $source = imagecreatefromjpeg($image); $rotate = imagerotate($source,90,0); imageJPEG($rotate,$image); // After executing - EXIF/IPTC data doesn't exist anymore. ?> Am I doing

问题 I have a script to convert PNG files to JPEG files. Except, I'm not exactly sure how it works. What do use for $outputPngFile and $outputJpgFile? Can I do this with a tmp file, like when the user is uploading it? Then, how do I access the new file to move it to the proper image directory? function pngTojpg($image, $outputPngFile, $outputJpgFile, $quality) { $image = imagecreatefrompng($image); //Save the png image imagepng($image, $outputPngFile); //Save the jpeg image imagejpeg($image,

问题 I have successfully compiled a C-program by GCC on Mac with GD2 library installed directly from sources. Now I am trying to do that with GD2 library installed via MacPorts and have the following error message: plotgeometry.c:5:16: error: gd.h: No such file or directory plotgeometry.c: In function 'PlotGeometry': plotgeometry.c:28: error: 'gdImagePtr' undeclared (first use in this function) plotgeometry.c:28: error: (Each undeclared identifier is reported only once plotgeometry.c:28: error:

问题 I have successfully compiled a C-program by GCC on Mac with GD2 library installed directly from sources. Now I am trying to do that with GD2 library installed via MacPorts and have the following error message: plotgeometry.c:5:16: error: gd.h: No such file or directory plotgeometry.c: In function 'PlotGeometry': plotgeometry.c:28: error: 'gdImagePtr' undeclared (first use in this function) plotgeometry.c:28: error: (Each undeclared identifier is reported only once plotgeometry.c:28: error:

问题 I'm using PHP 7.4 and when i try to write text on image using imagettftext() function nothing happen only blank image! when i roll back to PHP 5.6 it works perfect. I've confirmed that GD is enabled and i'm under windows OS Here is my code (i have copied it from php.net): // Set the content-type header('Content-Type: image/png'); // Create the image $im = imagecreatetruecolor(400, 30); // Create some colors $white = imagecolorallocate($im, 255, 255, 255); $grey = imagecolorallocate($im, 128,