program

program

class
ProgramWrapper
ProgramLoader

class ProgramWrapper

This class wraps a WebGLProgram and stores its attributes and uniforms

method	description
constructor(glContext, name)	Create a webgl program from the given webgl context and sets a name
get glContext()	Get the webgl context associated with the program
get glProgram()	Get the WebGLProgram instance referenced by this object
get name()	Get the name of this program
use()	Use this program for rendering
getAttributeLocation(name)	Return the location for the requested attribute name
getUniformLocation(name)	Return the location for the requested uniform name
getUniformBlockIndex(name)	Return the index for the requested uniform block name
uniformBlockBinding(name, index)	Call gl.uniformBlockBinding to bind uniform block to given index
queryAttributes()	Query the GPU for all the attributes of the current program and stores the data
queryUniforms()	Query the GPU for all the uniforms of the current program and stores the data
queryUniformBlocks()	Query the GPU for all the uniform blocks of the current program and stores the data

class ProgramLoader

This class loads the shaders and creates the programs

method	description
constructor(app)	Create an instance that references the given app
loadShader(url, type, name=url)	Create and compile a shader loading the source code from url Fails if the shader name is already taken
addShaderSource(src, type, name)	Create and compile a shader with the given source code Fails if the shader name is already taken
addProgram(name, shaderNames)	Create a program in the app object, attach the shaders with the given names, link the program and detach the sahders. Fails if the specified name is already taken in the app object or if a shader needed is not present
async loadFromJSON(url)	Load a json from url and uses it to load shaders and programs. calling loadFromObject method
async loadFromObject(obj)	Load shaders and programs from an object with the following structure: { path : "path/to/shaders", shaders : [ { type : "VERTEX_SHADER", file : "vertex.glsl" }, ... ], programs : [ { name : "myProg", shaders : ["vertex.glsl", "fragment.glsl"] }, ... ] } Return a promise that resolves to an array of the programs loaded Fails if a shader can't be loaded
async deleteShaders()	Call deleteShader for every shader previously loaded
async checkShaders()	Check all shaders for compile errors Log the shader info log in the console. Return the number of compile errors. Useful only for debug
async checkPrograms()	Check all programs of this loader for link errors Log the program info log in the console. Return the number of link errors. Useful only for debug
async validatePrograms()	Validate all programs of this loader and check for errors Log the program info log in the console. Return the number of errors. Useful only for debug