![]() That this trade-off will also be more beneficial for multiprocessing, Transfers outweighs the cost of the additional computation. So, with the vectorization, theĬomputation is cheap enough so that the reduction in cache-CPU ![]() Reads the input line twice and writes it once, but computing the Selecting every filter means the code will read the input row nearlyįive times and write it nearly five times. Number of transfers from memory cache to the CPU. Basically, the idea here is to reduce the Itself, but, with "-ftree-vectorize" it makes that "gm convert"Ĭommand run ~10-15% faster. Pngwutil.c to first score all filters in one pass (at least in cases I have attached a patch changing the filter selection code in The GraphicsMagick command "gm convert _.pnm _.png", for myįew test files, and it more import to the next item.Ģ. ![]() Multiple data (SIMD) loop vectorization gets about a 1% improvement in Compiling pngwutil.c with "-ftree-vectorize" (which is alsoĪctivated by "-O3") to get the compiler to generate single instruction Paper with some writing on it, scan of a book page, scan of a magazineġ. Images, each of a different type (scan of a mostly white piece of Pass along a few observations so far, from my initial look, using gccĩ.3.0-10ubuntu2 on Ubuntu 20.04 on an i7-4770k, trying just a few. Of an "upcoming 1.7.x series" for libpng atĪssuming that this mailing list is the right place, I would like to The current release occurred in the past few months, and I see mention $font_file = JPATH_SITE.'templates/'.$this->template.'/FelipaRegular.I am new to libpng development, just looking to avoid duplication ofĮffort in a what I expect to be just a brief exploration of ways to ![]() $text_color = imagecolorallocate( $my_img, 0, 255, 0 ) $my_img = imagecreatefrompng ($image_file) $image_file = JPATH_SITE.'templates/'.$this->template.'/images/certificate_page.png' Require_once("includes/variables_certificate.php") filesize($filename)) Īnd the certgenerator.php: defined('_JEXEC') or die Header('Cache-Control: must-revalidate') Header('Content-Transfer-Encoding: binary') Header('Content-Disposition: attachment filename="certificate.png"') Header('Content-Type: application/octet-stream') Header('Content-Description: File Transfer') $filename = JURI::root().'index.php?tmpl=certgenerator&quizmod='.$quizmod //Not working Partial Solution working for static image (thanks trying to get the dynamic image to work thoughĭownload.php: template.'/template_preview.png' //works The only other thread I could find from Joomla was here and not quite the same issue: Forcing file download in PHP - inside Joomla frameworkĪlso followed a bunch of examples in here: This isn't even the part where I'm pulling in the dynamic image yet :/ Here's one script I was able to get working outside of Joomla, using the template preview as an existing image: template.'/template_preview.png' I haven't even gotten to the dynamically created image yet and running into issues with just a static one, namely the file downloaded is invalid. Once again, I can get something working outside of Joomla but not within. I need users to click on a link and download that image. Pulling some simple data after a quiz to draw a certificate image. I'm new to Joomla and PHP dev so bear with me.
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