WebGLRenderingContext.getProgramInfoLog()

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

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	Status	Comment
WebGL 1.0 getProgramInfoLog	Recommendation	Initial definition.
OpenGL ES 2.0 glGetProgramInfoLog	Standard	Man page of the OpenGL API.

Browser compatibility

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