/**
* Gets the jpeg contents of the resized version of an already uploaded image
- * (Returns false if the uploaded file was not an image)
+ * (Returns false if the file was not an image)
*
- * @param string $input_name The name of the file input field on the submission form
- * @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.
+ * @param string $input_name The name of the file on the disk
+ * @param int $maxwidth The desired width of the resized image
+ * @param int $maxheight The desired height of the resized image
+ * @param true|false $square If set to true, takes the smallest of maxwidth and
+ * maxheight and use it to set the dimensions on the new image. If no
+ * crop parameters are set, the largest square that fits in the image
+ * centered will be used for the resize. If square, the crop must be a
+ * square region.
+ * @param int $x1 x coordinate for top, left corner
+ * @param int $y1 y coordinate for top, left corner
+ * @param int $x2 x coordinate for bottom, right corner
+ * @param int $y2 y coordinate for bottom, right corner
* @return false|mixed The contents of the resized image, or false on failure
*/
-function get_resized_image_from_existing_file($input_name, $maxwidth, $maxheight, $square = false, $x1 = 0, $y1 = 0, $x2 = 0, $y2 = 0) {
+function get_resized_image_from_existing_file($input_name, $maxwidth, $maxheight, $square = FALSE, $x1 = 0, $y1 = 0, $x2 = 0, $y2 = 0) {
// Get the size information from the image
- if ($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;
- }
+ $imgsizearray = getimagesize($input_name);
+ if ($imgsizearray == FALSE) {
+ return FALSE;
+ }
+
+ // Get width and height
+ $width = $imgsizearray[0];
+ $height = $imgsizearray[1];
+
+ // make sure we can read the image
+ $accepted_formats = array(
+ 'image/jpeg' => 'jpeg',
+ 'image/pjpeg' => 'jpeg',
+ 'image/png' => 'png',
+ 'image/x-png' => 'png',
+ 'image/gif' => 'gif'
+ );
+
+ // make sure the function is available
+ $load_function = "imagecreatefrom" . $accepted_formats[$imgsizearray['mime']];
+ if (!is_callable($load_function)) {
+ return FALSE;
+ }
- $newwidth = $width;
- $newheight = $height;
+ // crop image first?
+ $crop = TRUE;
+ if ($x1 == 0 && $y1 == 0 && $x2 == 0 && $y2 == 0) {
+ $crop = FALSE;
+ }
+
+ // how large a section of the image has been selected
+ if ($crop) {
+ $region_width = $x2 - $x1;
+ $region_height = $y2 - $y1;
+ } else {
+ // everything selected if no crop parameters
+ $region_width = $width;
+ $region_height = $height;
+ }
+
+ // determine cropping offsets
+ if ($square) {
+ // asking for a square image back
+
+ // detect case where someone is passing crop parameters that are not for a square
+ if ($crop == TRUE && $region_width != $region_height) {
+ return FALSE;
}
-
- if ($width > $maxwidth) {
- $newheight = floor($height * ($maxwidth / $width));
- $newwidth = $maxwidth;
+
+ // size of the new square image
+ $new_width = $new_height = min($maxwidth, $maxheight);
+
+ // find largest square that fits within the selected region
+ $region_width = $region_height = min($region_width, $region_height);
+
+ // set offsets for crop
+ if ($crop) {
+ $widthoffset = $x1;
+ $heightoffset = $y1;
+ $width = $x2 - $x1;
+ $height = $width;
+ } else {
+ // place square region in the center
+ $widthoffset = floor(($width - $region_width) / 2);
+ $heightoffset = floor(($height - $region_height) / 2);
}
+ } else {
+ // non-square new image
- if ($newheight > $maxheight) {
- $newwidth = floor($newwidth * ($maxheight / $newheight));
- $newheight = $maxheight;
+ $new_width = $maxwidth;
+ $new_height = $maxwidth;
+
+ // maintain aspect ratio of original image/crop
+ if (($region_height / (float)$new_height) > ($region_width / (float)$new_width)) {
+ $new_width = floor($new_height * $region_width / (float)$region_height);
+ } else {
+ $new_height = floor($new_width * $region_height / (float)$region_width);
}
-
- $accepted_formats = array(
- 'image/jpeg' => 'jpeg',
- 'image/png' => 'png',
- 'image/gif' => 'gif'
- );
-
- // If it's a file we can manipulate ...
- if (array_key_exists($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 = $maxwidth;
- }
- imagecopyresampled($newimage, $oldimage, 0,0,$widthoffset,$heightoffset,$newwidth,$newheight,$width,$height);
- //}
-
- // imagecopyresized($newimage, $oldimage, 0,0,0,0,$newwidth,$newheight,$width,$height);
- ob_start();
- imagejpeg($newimage, null, 90);
- $jpeg = ob_get_clean();
- return $jpeg;
- }
+
+ // by default, use entire image
+ $widthoffset = 0;
+ $heightoffset = 0;
+
+ if ($crop) {
+ $widthoffset = $x1;
+ $heightoffset = $y1;
}
}
+
+
+ // load original image
+ $orig_image = $load_function($input_name);
+ if (!$orig_image) {
+ return FALSE;
+ }
- return false;
-}
+ // allocate the new image
+ $newimage = imagecreatetruecolor($new_width, $new_height);
+ if (!$newimage) {
+ return FALSE;
+ }
+
+ // create the new image
+ $rtn_code = imagecopyresampled( $newimage,
+ $orig_image,
+ 0,
+ 0,
+ $widthoffset,
+ $heightoffset,
+ $new_width,
+ $new_height,
+ $region_width,
+ $region_height );
+ if (!$rtn_code) {
+ return FALSE;
+ }
+
+ // grab contents for return
+ ob_start();
+ imagejpeg($newimage, null, 90);
+ $jpeg = ob_get_clean();
+
+ imagedestroy($newimage);
+ imagedestroy($orig_image);
+
+ return $jpeg;
+}
// putting these here for now
-
function file_delete($guid) {
if ($file = get_entity($guid)) {
if ($file->canEdit()) {
projects / lorea / elgg.git / commitdiff