这是
实验性技术
检查
浏览器兼容性表格
要小心谨慎在生产中使用这之前。
WebGLQuery
interface is part of the
WebGL 2
API and provides ways to asynchronously query for information. By default, occlusion queries and primitive queries are available.
Another kind of queries are disjoint timer queries, which allow you to measure performance and profiling of your GPU. Disjoint timer queries are available with the
EXT_disjoint_timer_query
extension only.
When working with
WebGLQuery
objects, the following methods of the
WebGL2RenderingContext
are useful:
WebGL2RenderingContext.createQuery()
WebGL2RenderingContext.deleteQuery()
WebGL2RenderingContext.isQuery()
WebGL2RenderingContext.beginQuery()
WebGL2RenderingContext.endQuery()
WebGL2RenderingContext.getQuery()
WebGL2RenderingContext.getQueryParameter()
WebGLQuery
对象
in this example,
gl
必须为
WebGL2RenderingContext
.
WebGLQuery
objects are not available in WebGL 1.
var query = gl.createQuery();
| 规范 | 状态 | 注释 |
|---|---|---|
|
WebGL 2.0
The definition of 'WebGLQuery' in that specification. |
编者草案 | 初始定义。 |
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
更新 GitHub 上的兼容性数据| 桌面 | 移动 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
WebGLQuery
|
Chrome 56 | Edge 79 | Firefox 51 | IE No | Opera 43 | Safari No | WebView Android 58 | Chrome Android 58 | Firefox Android 51 | Opera Android 43 | Safari iOS No | Samsung Internet Android 7.0 |
完整支持
不支持
WebGLQuery
ANGLE_instanced_arrays
EXT_blend_minmax
EXT_color_buffer_half_float
EXT_disjoint_timer_query
EXT_frag_depth
EXT_sRGB
EXT_shader_texture_lod
EXT_texture_filter_anisotropic
OES_element_index_uint
OES_standard_derivatives
OES_texture_float
OES_texture_float_linear
OES_texture_half_float
OES_texture_half_float_linear
OES_vertex_array_object
WEBGL_color_buffer_float
WEBGL_compressed_texture_atc
WEBGL_compressed_texture_etc1
WEBGL_compressed_texture_pvrtc
WEBGL_compressed_texture_s3tc
WEBGL_compressed_texture_s3tc_srgb
WEBGL_debug_renderer_info
WEBGL_debug_shaders
WEBGL_depth_texture
WEBGL_draw_buffers
WEBGL_lose_context
WebGL2RenderingContext
WebGLActiveInfo
WebGLBuffer
WebGLContextEvent
WebGLFramebuffer
WebGLObject
WebGLProgram
WebGLRenderbuffer
WebGLRenderingContext
WebGLSampler
WebGLShader
WebGLShaderPrecisionFormat
WebGLSync
WebGLTexture
WebGLTransformFeedback
WebGLUniformLocation
WebGLVertexArrayObject