Knah-Tsaeb
/
Minigalnano
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Fixes #41, #2 

Closes #2, thumbnails now rotate properly
closes #41, adds more exif orientations
This commit is contained in:
Jan 2014-06-04 16:41:21 +02:00
parent 1756aa1404
commit d6595f487c
1 changed files with 70 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

75
createthumb.php
View File

@ -30,6 +30,33 @@ if (preg_match("/.gif$/i", $_GET['filename'])) header('Content-type: image/gif')
if (preg_match("/.png$/i", $_GET['filename'])) header('Content-type: image/png');
*/
// flip functions from http://stackoverflow.com/questions/8232722/how-to-flip-part-of-an-image-horizontal-with-php-gd
function flipVertical(&$img) {
$size_x = imagesx($img);
$size_y = imagesy($img);
$temp = imagecreatetruecolor($size_x, $size_y);
$x = imagecopyresampled($temp, $img, 0, 0, 0, ($size_y-1), $size_x, $size_y, $size_x, 0-$size_y);
if ($x)
{
$img = $temp;
} else {
die("Unable to flip image");
}
}
function flipHorizontal(&$img) {
$size_x = imagesx($img);
$size_y = imagesy($img);
$temp = imagecreatetruecolor($size_x, $size_y);
$x = imagecopyresampled($temp, $img, 0, 0, ($size_x-1), 0, $size_x, $size_y, 0-$size_x, $size_y);
if ($x)
{
$img = $temp;
} else {
die("Unable to flip image");
}
}
function str_split_php4( $text, $split = 1 ) {
// place each character of the string into and array
$array = array();
@ -118,22 +145,40 @@ else // otherwise, generate thumbnail, send it and save it to file.
{
if (function_exists('exif_read_data') && function_exists('imagerotate'))
{
$exif = exif_read_data($_GET['filename']);
$exif = exif_read_data($_GET['filename'], 0, true);
$ort = $exif['IFD0']['Orientation'];
$degrees = 0;
switch($ort)
{
case 3: // 180 rotate right
$degrees = 180;
break;
case 6: // 90 rotate right
$degrees = 270;
break;
case 8: // 90 rotate left
$degrees = 90;
break;
case 2: // flip vertical
$flip = 'vertical';
break;
// see http://www.daveperrett.com/articles/2012/07/28/exif-orientation-handling-is-a-ghetto/ for more info on orientation
case 7: // flipped
$degrees = 90;
$flip = 'vertical';
break;
case 5: // flipped
$degrees = 270;
$flip = 'vertical';
break;
case 4: // flipped
$degrees = 180;
$flip = 'vertical';
break;
}
if ($degrees != 0) $target = imagerotate($target, $degrees, 0);
}
}
$target = ImageCreatetruecolor($_GET['size'],$_GET['size']);
//if the picture can be transparent, add a white background instead a black
@ -143,6 +188,7 @@ else // otherwise, generate thumbnail, send it and save it to file.
imagefill($target, 0, 0, $backgroundColor);
}
if (preg_match("/.jpg$/i", $_GET['filename'])) $source = ImageCreateFromJPEG($_GET['filename']);
if (preg_match("/.gif$/i", $_GET['filename'])) $source = ImageCreateFromGIF($_GET['filename']);
if (preg_match("/.png$/i", $_GET['filename'])) $source = ImageCreateFromPNG($_GET['filename']);
@ -152,9 +198,28 @@ else // otherwise, generate thumbnail, send it and save it to file.
//if (preg_match("/.jpg$/i", $_GET['filename'])) ImageJPEG($target,null,90);
//if (preg_match("/.gif$/i", $_GET['filename'])) ImageGIF($target,null,90);
//if (preg_match("/.png$/i", $_GET['filename'])) ImageJPEG($target,null,90); // Using ImageJPEG on purpose
//proper rotation by jan niggemann
if ($degrees != 0)
{
$target = imagerotate($target, $degrees, 0);
}
ob_start(); // Start output buffering.
header('Content-type: image/jpeg'); // We always render the thumbnail in JPEG even if the source is GIF or PNG.
ImageJPEG($target,null,80);
//proper mirror (aka flip) by jan niggemann
if ($flip == 'vertical')
{
//only in php >= 5.5.0 ImageJPEG(imageflip($target, IMG_FLIP_VERTICAL),null,80);
flipVertical($target);
flipHorizontal($target);
flipVertical($target);
ImageJPEG($target,null,80);
} else {
ImageJPEG($target,null,80);
}
imagedestroy($target);
$cachedImage = ob_get_contents(); // Get the buffer content.
@ -167,4 +232,4 @@ else // otherwise, generate thumbnail, send it and save it to file.
}
}
?>
?>