te')); return $arr; } /* 遍历用户所有主题 * @param $uid 用户ID * @param int $page 页数 * @param int $pagesize 每页记录条数 * @param bool $desc 排序方式 TRUE降序 FALSE升序 * @param string $key 返回的数组用那一列的值作为 key * @param array $col 查询哪些列 */ function thread_tid_find_by_uid($uid, $page = 1, $pagesize = 1000, $desc = TRUE, $key = 'tid', $col = array()) { if (empty($uid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('uid' => $uid), array('tid' => $orderby), $page, $pagesize, $key, $col); return $arr; } // 遍历栏目下tid 支持数组 $fid = array(1,2,3) function thread_tid_find_by_fid($fid, $page = 1, $pagesize = 1000, $desc = TRUE) { if (empty($fid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('fid' => $fid), array('tid' => $orderby), $page, $pagesize, 'tid', array('tid', 'verify_date')); return $arr; } function thread_tid_delete($tid) { if (empty($tid)) return FALSE; $r = thread_tid__delete(array('tid' => $tid)); return $r; } function thread_tid_count() { $n = thread_tid__count(); return $n; } // 统计用户主题数 大数量下严谨使用非主键统计 function thread_uid_count($uid) { $n = thread_tid__count(array('uid' => $uid)); return $n; } // 统计栏目主题数 大数量下严谨使用非主键统计 function thread_fid_count($fid) { $n = thread_tid__count(array('fid' => $fid)); return $n; } ?>flutter - What is the rendering technique for android native views in Jetpack Compose - Stack Overflow

科技改变生活-雨落星辰 - 所有的伟大,都源于一个勇敢的开始

    最新消息：雨落星辰是一个专注网站SEO优化、网站SEO诊断、搜索引擎研究、网络营销推广、网站策划运营及站长类的自媒体原创博客
    你的位置： 首页>programmer>flutter - What is the rendering technique for android native views in Jetpack Compose - Stack Overflow

    flutter - What is the rendering technique for android native views in Jetpack Compose - Stack Overflow

    programmeradmin2浏览0评论

    Jetpack Compose supports embedding native Android Views (e.g. WebView).

    In Flutter there are discussions on the rendering techniques used to render and compose (compose as in "Image Layer Composition") those views, for example here, here, and here.

    For a quick example of what I am looking for, here is an excerpt:

    AndroidView widgets need to be composited within the Flutter UI and interleaved between Flutter widgets. However the entire Flutter UI is rendered to a single texture.

    In order to solve this problem, Flutter inflates and renders AndroidView widgets inside of VirtualDisplays instead of attempting to add it to the Android View hierarchy alongside Flutter's texture directly. The VirtualDisplay renders its output to a raw graphical buffer (accessed through getSurface()), and not to any actual real display(s) of the device. This allows Flutter to graphically interleave the Android View inside of its own Flutter widget tree by taking the texture from the VirtualDisplay output and treating it as a texture associated with any other Flutter widget in its internal hierarchy. Then the VirtualDisplay's Surface output is composited with the rest of the Flutter widget hierarchy and rendered as part of Flutter's larger texture output on Android.

    I don't see any discussion around this topic in Jetpack Compose documentation. How exactly does Jetpack compose achieve the same effect? For instance:

    • Does it first draw the native views to a separate Texture or Surface?
    • etc.

    与本文相关的文章

    发布评论

    评论列表(0)

    1. 暂无评论