WebGLRenderingContext.getProgramInfoLog()
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
WebGLRenderingContext.getProgramInfoLog 返回参数中指定的WebGLProgram
object 的信息。这些信息包括在 linking 过程中的错误以及 WebGLProgram
objects 合法性检查的错误。
Syntax
gl.getProgramInfoLog(program);
Parameters
- program
-
A
WebGLProgram
to query.
Return value
返回 DOMString
包含 diagnostic , warning ...等等关于上一次 linking 和 valiadation 操作的信息。对于刚刚创建的WebGLProgram
object , 返回一个空字符串。
Examples
Checking program errors
js
var canvas = document.getElementsById("canvas");
var gl = canvas.getContext("webgl");
var program = gl.createProgram();
//vsSource is the source-code-string of vertex-shader
//fsSource is the source-code-string of fragment-shader
var vertexShader = loadShader(gl, gl.VERTEX_SHADER, vsSource);
var fragmentShader = loadShader(gl, gl.FRAGMENT_SHADER, fsSource);
// Attach pre-existing shaders
gl.attachShader(program, vertexShader);
gl.attachShader(program, fragmentShader);
gl.linkProgram(program);
gl.getProgramInfoLog(program);
Specifications
Specification |
---|
WebGL Specification # 5.14.9 |
Browser compatibility
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