/**
* This function resizes an image, with preserving its proportions (or aspect ratio).
* @author Ivan Tcholakov, MAY-2009.
* @param int $image System path or URL of the image
* @param int $target_width Targeted width
* @param int $target_height Targeted height
* @return array Calculated new width and height
*/
function api_resize_image($image, $target_width, $target_height)
{
$image_properties = api_getimagesize($image);
return api_calculate_image_size($image_properties['width'], $image_properties['height'], $target_width, $target_height);
}
//clean memory
imagedestroy($crop);
}
//end !exist thumbnail
//show thumbnail and link
$one_image_thumbnail_file = '.thumbs/.' . $one_image_file;
//get path thumbnail
$doc_url = $path && $path !== '/' ? $path . '/' . $one_image_thumbnail_file : $path . $one_image_thumbnail_file;
$image_tag[] = '<img src="download.php?doc_url=' . $doc_url . '" border="0" title="' . $one_image_file . '">';
} else {
//if images aren't support by gd (not gif, jpg, jpeg, png)
if ($imagetype == "bmp") {
// use getimagesize instead api_getimagesize($image); becasuse api_getimagesize doesn't support bmp files. Put here for each show, only for a few bmp files isn't heavy
$original_image_size = getimagesize($image);
if ($max_thumbnail_width < $original_image_size[0] || $max_thumbnail_height < $original_image_size[1]) {
$thumbnail_size = api_calculate_image_size($original_image_size[0], $original_image_size[1], $max_thumbnail_width, $max_thumbnail_height);
//don't use resize_image because doesn't run with bmp files
$image_height = $thumbnail_size['height'];
$image_width = $thumbnail_size['width'];
} else {
$image_height = $original_image_size[0];
$image_width = $original_image_size[1];
}
} else {
//example for svg files,...
$image_width = $max_thumbnail_width;
$image_height = $max_thumbnail_height;
}
$doc_url = $path && $path !== '/' ? $path . '/' . $one_image_file : $path . $one_image_file;
$image_tag[] = '<img src="download.php?doc_url=' . $doc_url . '" border="0" width="' . $image_width . '" height="' . $image_height . '" title="' . $one_image_file . '">';
}
//run each once we view thumbnails is too heavy, then need move into !file_exists($image_thumbnail, and only run when haven't the thumbnail
switch ($imagetype) {
case 'gif':
$source_img = imagecreatefromgif($image);
break;
case 'jpg':
$source_img = imagecreatefromjpeg($image);
break;
case 'jpeg':
$source_img = imagecreatefromjpeg($image);
break;
case 'png':
$source_img = imagecreatefrompng($image);
break;
}
$new_thumbnail_size = api_calculate_image_size($original_image_size['width'], $original_image_size['height'], $max_thumbnail_width, $max_thumbnail_height);
if ($max_thumbnail_width > $original_image_size['width'] && $max_thumbnail_height > $original_image_size['height']) {
$new_thumbnail_size['width'] = $original_image_size['width'];
$new_thumbnail_size['height'] = $original_image_size['height'];
}
$crop = imagecreatetruecolor($new_thumbnail_size['width'], $new_thumbnail_size['height']);
// preserve transparency
if ($imagetype == "png") {
imagesavealpha($crop, true);
$color = imagecolorallocatealpha($crop, 0x0, 0x0, 0x0, 127);
imagefill($crop, 0, 0, $color);
}
if ($imagetype == "gif") {
$transindex = imagecolortransparent($source_img);
$palletsize = imagecolorstotal($source_img);
//GIF89a for transparent and anim (first clip), either GIF87a
