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
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.
Update compatibility data on GitHub
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
isProgram | Chrome Full support 9 | Edge Full support 12 | Firefox Full support 4 | IE Full support 11 | Opera Full support 12 | Safari Full support 5.1 | WebView Android Full support Yes | Chrome Android Full support 25 | Firefox Android Full support Yes | Opera Android Full support 12 | Safari iOS Full support 8 | Samsung Internet Android Full support Yes |
Legend
- Full support
- Full support