WebGLRenderingContext.getProgramInfoLog

The WebGLRenderingContext.getProgramInfoLog returns the information log for the specified WebGLProgram object. It contains errors that occurred during failed linking or validation of WebGLProgram objects.

Syntax

gl.getProgramInfoLog(program);

Parameters

program

A WebGLProgram to query.

Return value

A DOMString that contains diagnostic messages, warning messages, and other information about the last linking or validation operation. When a WebGLProgram object is initially created, its information log will be a string of length 0.

Examples

Checking program errors

var program = gl.createProgram();

// 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 The definition of 'getProgramInfoLog' in that specification.	Recommendation	Initial definition.
OpenGL ES 2.0 The definition of 'glGetProgramInfoLog' in that specification.	Standard	Man page of the OpenGL API.

Browser compatibility

See also

• WebGLRenderingContext.getShaderInfoLog()
• WebGLRenderingContext.getError()