权限没有，则隐藏 function forum_list_access_filter($forumlist, $gid, $allow = 'allowread') { global $grouplist; if (empty($forumlist)) return array(); if (1 == $gid) return $forumlist; $forumlist_filter = $forumlist; $group = $grouplist[$gid]; foreach ($forumlist_filter as $fid => $forum) { if (empty($forum['accesson']) && empty($group[$allow]) || !empty($forum['accesson']) && empty($forum['accesslist'][$gid][$allow])) { unset($forumlist_filter[$fid]); } unset($forumlist_filter[$fid]['accesslist']); } return $forumlist_filter; } function forum_filter_moduid($moduids) { $moduids = trim($moduids); if (empty($moduids)) return ''; $arr = explode(',', $moduids); $r = array(); foreach ($arr as $_uid) { $_uid = intval($_uid); $_user = user_read($_uid); if (empty($_user)) continue; if ($_user['gid'] > 4) continue; $r[] = $_uid; } return implode(',', $r); } function forum_safe_info($forum) { //unset($forum['moduids']); return $forum; } function forum_filter($forumlist) { foreach ($forumlist as &$val) { unset($val['brief'], $val['announcement'], $val['seo_title'], $val['seo_keywords'], $val['create_date_fmt'], $val['icon_url'], $val['modlist']); } return $forumlist; } function forum_format_url($forum) { global $conf; if (0 == $forum['category']) { // 列表URL $url = url('list-' . $forum['fid'], '', FALSE); } elseif (1 == $forum['category']) { // 频道 $url = url('category-' . $forum['fid'], '', FALSE); } elseif (2 == $forum['category']) { // 单页 $url = url('read-' . trim($forum['brief']), '', FALSE); } if ($conf['url_rewrite_on'] > 1 && $forum['well_alias']) { if (0 == $forum['category'] || 1 == $forum['category']) { $url = url($forum['well_alias'], '', FALSE); } elseif (2 == $forum['category']) { // 单页 $url = ($forum['threads'] && $forum['brief']) ? url($forum['well_alias'] . '-' . trim($forum['brief']), '', FALSE) : url($forum['well_alias'], '', FALSE); } } return $url; } function well_forum_alias() { $forumlist = forum_list_cache(); if (empty($forumlist)) return ''; $key = 'forum-alias'; static $cache = array(); if (isset($cache[$key])) return $cache[$key]; $cache[$key] = array(); foreach ($forumlist as $val) { if ($val['well_alias']) $cache[$key][$val['fid']] = $val['well_alias']; } return array_flip($cache[$key]); } function well_forum_alias_cache() { global $conf; $key = 'forum-alias-cache'; static $cache = array(); // 用静态变量只能在当前 request 生命周期缓存，跨进程需要再加一层缓存：redis/memcached/xcache/apc if (isset($cache[$key])) return $cache[$key]; if ('mysql' == $conf['cache']['type']) { $arr = well_forum_alias(); } else { $arr = cache_get($key); if (NULL === $arr) { $arr = well_forum_alias(); !empty($arr) AND cache_set($key, $arr); } } $cache[$key] = empty($arr) ? '' : $arr; return $cache[$key]; } ?>javascript - What is "colorspace" in imagedata? - Stack Overflow

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    javascript - What is "colorspace" in imagedata? - Stack Overflow

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    Needed to do some pixel manipulation, but ImageData has changed. Now it has a colorSpace property.

    What is this, and how do I use it as normal?

    Just get an ImageData object in Chrome to reproduce.

    Needed to do some pixel manipulation, but ImageData has changed. Now it has a colorSpace property.

    What is this, and how do I use it as normal?

    Just get an ImageData object in Chrome to reproduce.

    • javascript
    • html5-canvas
    • getimagedata
    • putimagedata
    Share Improve this question edited May 25, 2022 at 13:38 Yves M. 31k24 gold badges109 silver badges149 bronze badges asked Apr 24, 2017 at 7:49 KrisoKriso 1651 gold badge2 silver badges10 bronze badges 0
    Add a ment  | 

    1 Answer 1

    Reset to default 10

    This es from this proposal to implement color-space management in canvas.

    Currently, canvas is stuck with legacy-srgb 8 bit depth. Some monitor can't handle this low level of information.

    This is still a proposal, but the currently proposed syntax to set the colorSpace of a 2DContext would be ctx.getContext('2d', {colorSpace: 'color-space', pixelFormat: 'pixelFormat', linearPixelMath: boolean});

    Currently, no one has implemented it yet, but chromium and chrome are in the process of doing so.
    Their current implementation only exposes a getter colorSpace property on ImageData objects, and a getContextAttributes method on the Context2D object, but there is not yet a way to set it for us (maybe there is with some startup flag, but I didn't find it).

    Note: You need to set the Experimental canvas features flag to true in chrome://flags to get access to these properties.

    But anyway, this property should in no way alter your code. All the default parameters of the ImageData are still the same.

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