WebGLRenderingContext.isProgram()

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 WebGL API中的WebGLRenderingContext.isProgram() 函数 将会在WebGLProgram是一个合法的着色器程序(program)时返回 true , 而在其他情况返回false

语法

GLboolean gl.isProgram(program);

参数

program
一个要检查的 WebGLProgram对象 .

返回值

一个表示program是否有效的 GLboolean 值.

示例

检查一个program是否有效

var canvas = document.getElementById('canvas');
var gl = canvas.getContext('webgl');
var program = gl.createProgram();

// ...

gl.isProgram(program);

Specifications

Specification Status Comment
WebGL 1.0
isProgram
Recommendation Initial definition.
OpenGL ES 2.0
glIsProgram
Standard Man page of the OpenGL API.

浏览器兼容性

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic supportChrome Full support 9Edge Full support 12Firefox Full support 4IE Full support 11Opera Full support 12Safari Full support 5.1WebView Android Full support YesChrome Android Full support 25Edge Mobile Full support YesFirefox Android Full support YesOpera Android Full support 12Safari iOS Full support 8.1Samsung Internet Android Full support Yes

Legend

Full support  
Full support

另请参见

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