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Add support for plugins to resize images

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This also adds an event hook to get more metadata of the ImageFile.
Such as if it's animated or so.
This commit is contained in:
Mikael Nordfeldth 2014-06-05 12:59:38 +02:00
parent 3f9a16dc58
commit adf896bc12
3 changed files with 61 additions and 39 deletions
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5
EVENTS.txt
View File

@ -1459,6 +1459,11 @@ CreateFileImageThumbnailSource: Hook to create image thumbnail source from a Fil
- &$imgPath: Path to image file which can be used as source for our thumbnail algorithm.
- $media: MIME media type ('image', 'video', 'audio' etc.)
StartResizeImageFile: Hook to resize an image and output it to a file. No matching End event yet.
- $imagefile: ImageFile object we're resizing.
- $outpath: string with output filepath
- $box: array with size ('width', 'height') and boundary box('x', 'y', 'w', 'h').
StartShowAttachmentRepresentation: Attachment representation, full file (or in rare cases thumbnails/previews).
- $out: HTMLOutputter class to use for outputting HTML.
- $file: 'File' object which we're going to show representation for.

11
classes/File.php
View File

@ -418,13 +418,6 @@ class File extends Managed_DataObject
list($width, $height, $x, $y, $w2, $h2) =
$image->scaleToFit($width, $height, $crop);
// Doublecheck that parameters are sane and integers.
if ($width < 1 || $width > common_config('thumbnail', 'maxsize')
|| $height < 1 || $height > common_config('thumbnail', 'maxsize')) {
// Fail on bad width parameter. If this occurs, it's due to algorithm in ImageFile->scaleToFit
throw new ServerException('Bad thumbnail size parameters.');
}
$params = array('file_id'=> $this->id,
'width' => $width,
'height' => $height);
@ -437,7 +430,9 @@ class File extends Managed_DataObject
$outname = "thumb-{$width}x{$height}-" . $this->filename;
$outpath = self::path($outname);
$image->resizeTo($outpath, $width, $height, $x, $y, $w2, $h2);
$image->resizeTo($outpath, array('width'=>$width, 'height'=>$height,
'x'=>$x, 'y'=>$y,
'w'=>$w2, 'h'=>$h2));
// Avoid deleting the original
if ($image->getPath() != $this->getPath()) {

84
lib/imagefile.php
View File

@ -52,6 +52,7 @@ class ImageFile
var $height;
var $width;
var $rotate=0; // degrees to rotate for properly oriented image (extrapolated from EXIF etc.)
var $animated = false; // Animated image? (has more than 2 frames)
function __construct($id=null, $filepath=null, $type=null, $width=null, $height=null)
{
@ -97,6 +98,8 @@ class ImageFile
// If we ever write this back, Orientation should be set to '1'
}
}
Event::handle('FillImageFileMetadata', array($this));
}
public static function fromFileObject(File $file)
@ -193,7 +196,9 @@ class ImageFile
$size,
common_timestamp());
$outpath = Avatar::path($outname);
$this->resizeTo($outpath, $size, $size, $x, $y, $w, $h);
$this->resizeTo($outpath, array('width'=>$size, 'height'=>$size,
'x'=>$x, 'y'=>$y,
'w'=>$w, 'h'=>$h));
return $outname;
}
@ -207,26 +212,35 @@ class ImageFile
*/
function copyTo($outpath)
{
return $this->resizeTo($outpath, $this->width, $this->height);
return $this->resizeTo($outpath, array('width' =>$this->width,
'height'=>$this->height));
}
/**
* Create and save a thumbnail image.
*
* @param string $outpath
* @param int $width target width
* @param int $height target height
* @param int $x (default 0) upper-left corner to crop from
* @param int $y (default 0) upper-left corner to crop from
* @param int $w (default full) width of image area to crop
* @param int $h (default full) height of image area to crop
* @param array $box width, height, boundary box (x,y,w,h) defaults to full image
* @return string full local filesystem filename
*/
function resizeTo($outpath, $width, $height, $x=0, $y=0, $w=null, $h=null)
function resizeTo($outpath, array $box=array())
{
$w = ($w === null) ? $this->width:$w;
$h = ($h === null) ? $this->height:$h;
$targetType = $this->preferredType();
$box['width'] = isset($box['width']) ? intval($box['width']) : $this->width;
$box['height'] = isset($box['height']) ? intval($box['height']) : $this->height;
$box['x'] = isset($box['x']) ? intval($box['x']) : 0;
$box['y'] = isset($box['y']) ? intval($box['y']) : 0;
$box['w'] = isset($box['w']) ? intval($box['w']) : $this->width;
$box['h'] = isset($box['h']) ? intval($box['h']) : $this->height;
// Doublecheck that parameters are sane and integers.
if ($box['width'] < 1 || $box['width'] > common_config('thumbnail', 'maxsize')
|| $box['height'] < 1 || $box['height'] > common_config('thumbnail', 'maxsize')
|| $box['w'] < 1 || $box['x'] >= $this->width
|| $box['h'] < 1 || $box['y'] >= $this->height) {
// Fail on bad width parameter. If this occurs, it's due to algorithm in ImageFile->scaleToFit
common_debug("Boundary box parameters for resize of {$this->filepath} : ".var_export($box,true));
throw new ServerException('Bad thumbnail size parameters.');
}
if (!file_exists($this->filepath)) {
// TRANS: Exception thrown during resize when image has been registered as present, but is no longer there.
@ -234,38 +248,47 @@ class ImageFile
}
// Don't crop/scale if it isn't necessary
if ($width === $this->width
&& $height === $this->height
&& $x === 0
&& $y === 0
&& $w === $this->width
&& $h === $this->height
&& $this->type == $targetType) {
if ($box['width'] === $this->width
&& $box['height'] === $this->height
&& $box['x'] === 0
&& $box['y'] === 0
&& $box['w'] === $this->width
&& $box['h'] === $this->height
&& $this->type == $this->preferredType()) {
@copy($this->filepath, $outpath);
return $outpath;
}
if (Event::handle('StartResizeImageFile', array($this, $outpath, $box))) {
$this->resizeToFile($outpath, $box);
}
return $outpath;
}
protected function resizeToFile($outpath, array $box)
{
switch ($this->type) {
case IMAGETYPE_GIF:
case IMAGETYPE_GIF:
$image_src = imagecreatefromgif($this->filepath);
break;
case IMAGETYPE_JPEG:
case IMAGETYPE_JPEG:
$image_src = imagecreatefromjpeg($this->filepath);
break;
case IMAGETYPE_PNG:
case IMAGETYPE_PNG:
$image_src = imagecreatefrompng($this->filepath);
break;
case IMAGETYPE_BMP:
case IMAGETYPE_BMP:
$image_src = imagecreatefrombmp($this->filepath);
break;
case IMAGETYPE_WBMP:
case IMAGETYPE_WBMP:
$image_src = imagecreatefromwbmp($this->filepath);
break;
case IMAGETYPE_XBM:
case IMAGETYPE_XBM:
$image_src = imagecreatefromxbm($this->filepath);
break;
default:
default:
// TRANS: Exception thrown when trying to resize an unknown file type.
throw new Exception(_('Unknown file type'));
}
@ -274,7 +297,7 @@ class ImageFile
$image_src = imagerotate($image_src, $this->rotate, 0);
}
$image_dest = imagecreatetruecolor($width, $height);
$image_dest = imagecreatetruecolor($box['width'], $box['height']);
if ($this->type == IMAGETYPE_GIF || $this->type == IMAGETYPE_PNG || $this->type == IMAGETYPE_BMP) {
@ -297,9 +320,9 @@ class ImageFile
}
}
imagecopyresampled($image_dest, $image_src, 0, 0, $x, $y, $width, $height, $w, $h);
imagecopyresampled($image_dest, $image_src, 0, 0, $box['x'], $box['y'], $box['width'], $box['height'], $box['w'], $box['h']);
switch ($targetType) {
switch ($this->preferredType()) {
case IMAGETYPE_GIF:
imagegif($image_dest, $outpath);
break;
@ -316,10 +339,9 @@ class ImageFile
imagedestroy($image_src);
imagedestroy($image_dest);
return $outpath;
}
/**
* Several obscure file types should be normalized to PNG on resize.
*