146 lines
3.4 KiB
PHP
Executable File
146 lines
3.4 KiB
PHP
Executable File
<?php
|
|
|
|
class Image
|
|
{
|
|
/**
|
|
* Creates an image resource from a valid image file.
|
|
*
|
|
* @param string $srcFile The source file name
|
|
**/
|
|
static function create ($srcFile)
|
|
{
|
|
$imageType = exif_imagetype ($srcFile);
|
|
|
|
if ($imageType !== FALSE)
|
|
switch ($imageType)
|
|
{
|
|
case IMAGETYPE_JPEG:
|
|
$image = imagecreatefromjpeg ($srcFile);
|
|
break;
|
|
case IMAGETYPE_PNG:
|
|
$image = imagecreatefrompng ($srcFile);
|
|
break;
|
|
case IMAGETYPE_GIF:
|
|
$image = imagecreatefromgif ($srcFile);
|
|
break;
|
|
default:
|
|
throw new Exception (s('Bad file format'), 'badFileFormat');
|
|
}
|
|
else
|
|
throw new Exception (s('Image open error'), 'openError');
|
|
|
|
return $image;
|
|
}
|
|
|
|
/**
|
|
* Resizes and saves an image resource.
|
|
*
|
|
* @param resource $image The image resource
|
|
* @param string $dstFile The destination file name
|
|
* @param integer $maxHeight The maximum height of resized image in pixels
|
|
* @param integer $maxWidth The maximum width of resized image in pixels
|
|
* @param boolean $crop Wether to crop the image
|
|
* @param boolean $symbolicSrc If it is not necessary to resize the image creates a symbolic link using the passed path as source
|
|
**/
|
|
static function resizeSave ($image, $dstFile, $maxHeight, $maxWidth, $crop = FALSE, $symbolicSrc = NULL)
|
|
{
|
|
$width = imagesx ($image);
|
|
$height = imagesy ($image);
|
|
|
|
$dirname = dirname ($dstFile);
|
|
|
|
if (!is_dir ($dirname))
|
|
mkdir ($dirname, 0775, TRUE);
|
|
|
|
if (file_exists ($dstFile))
|
|
@unlink ($dstFile);
|
|
|
|
// Check if it is necessary to resize the image
|
|
|
|
if ($height > $maxHeight || $width > $maxWidth)
|
|
{
|
|
$srcX = 0;
|
|
$srcY = 0;
|
|
$srcWidth = $width;
|
|
$srcHeight = $height;
|
|
$dstWidth = $width;
|
|
$dstHeight = $height;
|
|
|
|
if (!$crop) // Resize
|
|
{
|
|
$ratio = NULL;
|
|
|
|
if ($dstWidth > $maxWidth)
|
|
{
|
|
$ratio = $dstWidth / $maxWidth;
|
|
$dstWidth = $maxWidth;
|
|
$dstHeight = (int) ($dstHeight / $ratio);
|
|
}
|
|
|
|
if ($dstHeight > $maxHeight)
|
|
{
|
|
$ratio = $dstHeight / $maxHeight;
|
|
$dstHeight = $maxHeight;
|
|
$dstWidth = (int) ($dstWidth / $ratio);
|
|
}
|
|
}
|
|
else // Cut & resize
|
|
{
|
|
if ($width > $maxWidth)
|
|
$dstWidth = $maxWidth;
|
|
if ($height > $maxWidth)
|
|
$dstHeight = $maxHeight;
|
|
|
|
if ($width <= $maxWidth)
|
|
{
|
|
if ($height > $srcHeight)
|
|
$srcHeight = $maxHeight;
|
|
}
|
|
elseif ($height <= $maxHeight)
|
|
{
|
|
if ($width > $maxWidth)
|
|
$srcWidth = $maxWidth;
|
|
}
|
|
else
|
|
{
|
|
$srcWidth = (int) ($maxWidth * ($height / $maxHeight));
|
|
$srcHeight = (int) ($maxHeight * ($width / $maxWidth));
|
|
|
|
if ($srcWidth <= $width)
|
|
$srcHeight = $height;
|
|
else
|
|
$srcWidth = $width;
|
|
}
|
|
|
|
if ($width !== $srcWidth)
|
|
$srcX = (int) (($width / 2) - ($srcWidth / 2));
|
|
|
|
if ($height !== $srcHeight)
|
|
$srcY = (int) (($height / 2) - ($srcHeight / 2));
|
|
}
|
|
|
|
$resizedImage = imagecreatetruecolor ($dstWidth, $dstHeight);
|
|
imagealphablending ($resizedImage, FALSE);
|
|
imagesavealpha ($resizedImage, TRUE);
|
|
imagecopyresampled ($resizedImage, $image,
|
|
0, 0, $srcX, $srcY, $dstWidth, $dstHeight, $srcWidth, $srcHeight);
|
|
$saved = imagepng ($resizedImage, $dstFile);
|
|
imagedestroy ($resizedImage);
|
|
}
|
|
elseif (isset ($symbolicSrc))
|
|
{
|
|
$saved = symlink ($symbolicSrc, $dstFile);
|
|
}
|
|
else
|
|
{
|
|
imagesavealpha ($image, TRUE);
|
|
$saved = imagepng ($image, $dstFile);
|
|
}
|
|
|
|
if (!$saved)
|
|
throw new Exception (sprintf (s('File save error: %s'), $dstFile), 'saveError');
|
|
}
|
|
}
|
|
|
|
?>
|