imagemagick support for creating thumbnails and watermarking

1 files changed, 109 insertions, 0 deletions

diff --git a/actions/resize.php b/actions/resize.php
new file mode 100644
index 000000000..8a8a5bb34
--- /dev/null
+++ b/actions/resize.php
@@ -0,0 +1,109 @@
+<?php
+
+/*
+         * Gets the jpeg contents of the resized version of an already uploaded image
+         * (Returns false if the uploaded file was not an image)
+         *
+         * @param string $input_name The name of the file input field on the submission form
+		 * @param string $prefix The text to prefix to the existing filename
+         * @param int $maxwidth The maximum width of the resized image
+         * @param int $maxheight The maximum height of the resized image
+         * @param true|false $square If set to true, will take the smallest of maxwidth and maxheight and use it to set the dimensions on all size; the image will be cropped.
+         * @return false|mixed The contents of the resized image, or false on failure
+         */
+        function tp_resize($input_name, $prefix, $maxwidth, $maxheight, $square = false, $x1 = 0, $y1 = 0, $x2 = 0, $y2 = 0) {
+				$params = array(
+					"input_name"=>$input_name,
+					"output_name"=>$output_name,
+					"maxwidth"=>$maxwidth,
+					"maxheight"=>$maxheight,
+					"square"=>$square,
+					"x1"=>$x1,
+					"y1"=>$y1,
+					"x2"=>$x2,
+					"y2"=>$y2);
+				
+				$path = pathinfo($input_name);
+				$output_name = $path["dirname"] . "/$prefix" . $path["filename"] . "." . $path["extension"];
+				
+                // Get the size information from the image
+                if ($imgsizearray = getimagesize($input_name)) {
+
+                        // Get width and height
+                        $width = $imgsizearray[0];
+                        $height = $imgsizearray[1];
+                        $newwidth = $width;
+                        $newheight = $height;
+                        
+                        // Square the image dimensions if we're wanting a square image
+                        if ($square) {
+                                if ($width < $height) {
+                                        $height = $width;
+                                } else {
+                                        $width = $height;
+                                }
+                                
+                                $newwidth = $width;
+                                $newheight = $height;
+                                
+                        }
+
+                        if ($width > $maxwidth) {
+                                $newheight = floor($height * ($maxwidth / $width));
+                                $newwidth = $maxwidth;
+                        }
+                        if ($newheight > $maxheight) {
+                                $newwidth = floor($newwidth * ($maxheight / $newheight));
+                                $newheight = $maxheight;
+                        }
+
+                        $accepted_formats = array(
+                                                                                        'image/jpeg' => 'jpeg',
+                                                                                        'image/png' => 'png',
+                                                                                        'image/gif' => 'gif'
+                                                                        );
+                        // If it's a file we can manipulate ...
+                        if (array_key_exists($imgsizearray['mime'],$accepted_formats)) {
+
+//                                $function = "imagecreatefrom" . $accepted_formats[$imgsizearray['mime']];
+//                                $newimage = imagecreatetruecolor($newwidth,$newheight);
+                                
+//                                if (is_callable($function) && $oldimage = $function($input_name)) {
+                                        // Crop the image if we need a square
+                                        if ($square) {
+                                                if ($x1 == 0 && $y1 == 0 && $x2 == 0 && $y2 ==0) {
+                                                        $widthoffset = floor(($imgsizearray[0] - $width) / 2);
+                                                        $heightoffset = floor(($imgsizearray[1] - $height) / 2);
+                                                } else {
+                                                        $widthoffset = $x1;
+                                                        $heightoffset = $y1;
+                                                        $width = ($x2 - $x1);
+                                                        $height = $width;
+                                                }
+                                        } else {
+                                                if ($x1 == 0 && $y1 == 0 && $x2 == 0 && $y2 ==0) {
+                                                        $widthoffset = 0;
+                                                        $heightoffset = 0;
+                                                } else {
+                                                        $widthoffset = $x1;
+                                                        $heightoffset = $y1;
+                                                        $width = ($x2 - $x1);
+                                                        $height = ($y2 - $y1);
+                                                }
+                                        }//else {
+                                                // Resize and return the image contents!
+                                                if ($square) {
+                                                        $newheight = $maxheight;
+                                                        $newwidth = $maxwidth;
+                                                }
+												$command = "convert $input_name -resize ".$newwidth."x".$newheight."^ -gravity center -extent ".$newwidth."x".$newheight." $output_name";
+												system($command);
+												return $output_name;
+
+                        }
+                }
+
+                return false;
+        }
+
+?>