EXT_disjoint_timer_query.getQueryEXT()

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EXT_disjoint_timer_query.getQueryEXT() 方法在 WebGL API returns information about a query target.

句法

any ext.getQueryEXT(target, pname);

参数

target: A GLenum specifying the target of the time query. Must be ext.TIMESTAMP_EXT or ext.TIME_ELAPSED_EXT .
pname: A GLenum specifying which information to return. Must be ext.CURRENT_QUERY_EXT or ext.QUERY_COUNTER_BITS_EXT .

返回值

Depends on pname :

若 pname is ext.CURRENT_QUERY_EXT : A WebGLQuery object, which is the currently active query for the given target.
若 pname is ext.QUERY_COUNTER_BITS_EXT : A GLint indicating the number of bits used to hold the query result for the given target.

范例

var ext = gl.getExtension('EXT_disjoint_timer_query');
var startQuery = ext.createQueryEXT();
ext.queryCounterEXT(startQuery, ext.TIMESTAMP_EXT);
var currentQuery = ext.getQueryEXT(ext.TIMESTAMP_EXT,
                                   ext.CURRENT_QUERY_EXT);

规范

规范	状态	注释
EXT_disjoint_timer_query The definition of 'EXT_disjoint_timer_query' in that specification.	工作草案	初始定义。

浏览器兼容性

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	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`getQueryEXT`	Chrome 47 — 65 不支持 47 — 65 Removed due to the GLitch exploit .	Edge No 不支持 No Removed due to the GLitch exploit .	Firefox 51 — 63 不支持 51 — 63 Removed due to the GLitch exploit .	IE ?	Opera ?	Safari ?	WebView Android 47 — 65 不支持 47 — 65 Removed due to the GLitch exploit .	Chrome Android 47 — 65 不支持 47 — 65 Removed due to the GLitch exploit .	Firefox Android No	Opera Android ?	Safari iOS ?	Samsung Internet Android 5.0 — 9.0 不支持 5.0 — 9.0 Removed due to the GLitch exploit .

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句法

参数

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