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improve image scaling (fixes #59)

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* add width and height to AJAX result
 * handle preview image width and height changes
 * improve default_horizontal theme's css to handle vertical images
This commit is contained in:
Jan Dittberner 2009-07-31 19:20:07 +00:00
parent 922d234f11
commit 62d1ba55fe
4 changed files with 43 additions and 27 deletions
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46
includes/galleryfunctions.php
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@ -32,6 +32,10 @@ define(IMAGESEC, "images");
define(GALLERYSEC, "gallery");
define(GALLERY_RE, '/^[\w\d _-]+$/');
define(SCALE_WIDTH, 0);
define(SCALE_HEIGHT, 1);
define(SCALE_BOTH, 2);
$basedir = realpath(implode(DIRECTORY_SEPARATOR, array(dirname(__file__), '..')));
$inifile = implode(DIRECTORY_SEPARATOR, array($basedir, 'gallery.ini'));
@ -118,11 +122,14 @@ function getImageInfo($galleryname, $imagename) {
$label = getImageLabel($galleryname, $imagename);
$gallerylabel = getGalleryLabel($galleryname);
$scaledimage = getScaledImage($galleryname, $imagename,
$theme->previewsize, SCALE_BOTH);
$scaledsize = getimagesize($configuration['gallerydir'] .
DIRECTORY_SEPARATOR . $scaledimage);
return array("name" => $imagename,
"label" => $label,
"preview" => $configuration['gallerypath'] . '/' .
getScaledImage($galleryname, $imagename,
$theme->previewsize, false),
"preview" => array($configuration['gallerypath'] . '/' .
$scaledimage, $scaledsize[0], $scaledsize[1]),
"full" => implode('/', array($configuration['gallerypath'],
$galleryname, $imagename)),
"title" => sprintf("%s :: %s", $gallerylabel, $label)
@ -229,13 +236,31 @@ function getCurrentGallery() {
*
* @return Pfad des skalierten Bildes relativ zu @a gallerydir
*/
function getScaledImage($galleryname, $basename, $maxdim, $scaleheight=true) {
function getScaledImage($galleryname, $basename, $maxdim, $scaletype) {
global $configuration;
if ($maxdim == 0) {
debug_print_backtrace();
}
$gallerydir = realpath($configuration['gallerydir'] . DIRECTORY_SEPARATOR . $galleryname);
$originalfile = $gallerydir . DIRECTORY_SEPARATOR . $basename;
switch($scaletype) {
case SCALE_WIDTH:
$scaleheight = false;
break;
case SCALE_HEIGHT:
$scaleheight = true;
break;
case SCALE_BOTH:
$originalsize = getimagesize($originalfile);
$scaleheight = ($originalsize[1] > $originalsize[0]);
break;
default:
header('Content-Type: text/plain');
debug_print_backtrace();
die('Unknown scaletype');
}
if ($scaleheight) {
$scaleddir = sprintf("scaled_x%d", $maxdim);
} else {
@ -256,7 +281,6 @@ function getScaledImage($galleryname, $basename, $maxdim, $scaleheight=true) {
$scaledimage = $scaleddirpath . DIRECTORY_SEPARATOR . $basename;
if (!is_file($scaledimage)) {
// Datei erzeugen
$originalfile = $gallerydir . DIRECTORY_SEPARATOR . $basename;
$origimage = imagecreatefromjpeg($originalfile);
$origx = imagesx($origimage);
$origy = imagesy($origimage);
@ -293,17 +317,13 @@ function getThumbNailInfo($galleryname) {
$thumbsizes = array();
$thumbdimsum = 2;
$scaletype = ($theme->themetype == 'horizontal') ? SCALE_HEIGHT : SCALE_WIDTH;
foreach (glob(realpath($configuration['gallerydir'] . DIRECTORY_SEPARATOR .
$galleryname) . DIRECTORY_SEPARATOR .
'*.jp{e,}g', GLOB_BRACE) as $filename) {
$basename = basename($filename);
if ($theme->themetype == 'horizontal') {
$thumbfile = getScaledImage($galleryname, $basename, $theme->thumbsize,
true);
} else {
$thumbfile = getScaledImage($galleryname, $basename, $theme->thumbsize,
false);
}
$thumbfile = getScaledImage($galleryname, $basename, $theme->thumbsize,
$scaletype);
if ($thumbsize = getimagesize(realpath($configuration['gallerydir'] .
DIRECTORY_SEPARATOR .
$thumbfile))) {
@ -406,7 +426,7 @@ function getFirstPreview(&$thumbinfo) {
$galleryname = $thumbinfo[1];
$fullname = $configuration['gallerypath'] . '/' . $galleryname . '/' . $basename;
$scaledimage = getScaledImage($galleryname, $basename,
$theme->previewsize, false);
$theme->previewsize, SCALE_BOTH);
$scaledimagesize = getimagesize(realpath($configuration['gallerydir'] .
DIRECTORY_SEPARATOR .
$scaledimage));