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Made code changes to serve higher resolution images in displays with high pixel density.

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This commit is contained in:
root 2014-05-10 11:15:27 -07:00
parent 80796c78f5
commit ed5cebd3d6
2 changed files with 37 additions and 1 deletions
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33
mod/photo.php
View File

@ -80,6 +80,22 @@ function photo_init(&$a) {
* Other photos * Other photos
*/ */
/* Check for a cookie to indicate display pixel density, in order to detect high-resolution
displays. This procedure was derived from the "Retina Images" by Jeremey Worboys,
used in accordance with the Creative Commons Attribution 3.0 Unported License.
Project link: https://github.com/Retina-Images/Retina-Images
License link: http://creativecommons.org/licenses/by/3.0/
*/
$cookie_value = false;
if (isset($_COOKIE['devicePixelRatio'])) {
$cookie_value = intval($_COOKIE['devicePixelRatio']);
}
else {
// Force revalidation of cache on next request
$cache_directive = 'no-cache';
$status = 'no cookie';
}
$resolution = 0; $resolution = 0;
if(strpos($photo,'.') !== false) if(strpos($photo,'.') !== false)
@ -88,6 +104,23 @@ function photo_init(&$a) {
if(substr($photo,-2,1) == '-') { if(substr($photo,-2,1) == '-') {
$resolution = intval(substr($photo,-1,1)); $resolution = intval(substr($photo,-1,1));
$photo = substr($photo,0,-2); $photo = substr($photo,0,-2);
// Serve high-resolution images regardless (this is rude):
// [Note: this can be improved by setting a cookie to indicate that the user is viewing on a high-resolution display]
if ($resolution == 2 && ($cookie_value > 1))
{
$resolution = 1;
}
}
// If using resolution 1, make sure it exists before proceeding:
if ($resolution == 1)
{
$r = q("SELECT uid FROM photo WHERE resource_id = '%s' AND scale = %d LIMIT 1",
dbesc($photo),
intval($resolution)
);
if (!($r))
$resolution = 2;
} }
$r = q("SELECT uid FROM photo WHERE resource_id = '%s' AND scale = %d LIMIT 1", $r = q("SELECT uid FROM photo WHERE resource_id = '%s' AND scale = %d LIMIT 1",

3
view/tpl/head.tpl
View File

@ -7,6 +7,9 @@
<script src="https://html5shiv.googlecode.com/svn/trunk/html5.js"></script> <script src="https://html5shiv.googlecode.com/svn/trunk/html5.js"></script>
<![endif]--> <![endif]-->
<script>(function(w){var dpr=((w.devicePixelRatio===undefined)?1:w.devicePixelRatio);if(!!w.navigator.standalone){var r=new XMLHttpRequest();r.open('GET','/retinaimages.php?devicePixelRatio='+dpr,false);r.send()}else{document.cookie='devicePixelRatio='+dpr+'; path=/'}})(window)</script>
<noscript><style id="devicePixelRatio" media="only screen and (-moz-min-device-pixel-ratio: 2), only screen and (-o-min-device-pixel-ratio: 2/1), only screen and (-webkit-min-device-pixel-ratio: 2), only screen and (min-device-pixel-ratio: 2)">html{background-image:url("/retinaimages.php?devicePixelRatio=2")}</style></noscript>
{{$head_css}} {{$head_css}}
{{$js_strings}} {{$js_strings}}