webgl

Bindings for the WebGL rendering context used with WebAssembly applications.

Function	Description
`NewContext(id)`	Obtain a context from a canvas element by id.
`NewContextFrom(canvas, type...)`	Derive a context from an existing canvas value.
`Context.ClearColor(r,g,b,a)`	Set the clear color.
`Context.Clear(mask)`	Clear buffers.
`Context.CreateShader(t)`	Create a shader object.
`Context.ShaderSource(shader, src)`	Provide GLSL source for a shader.
`Context.CompileShader(shader)`	Compile a shader.
`Context.CreateProgram()`	Create a program object.
`Context.AttachShader(prog, shader)`	Attach a shader to a program.
`Context.LinkProgram(prog)`	Link a program.
`Context.UseProgram(prog)`	Use a program for rendering.
`Context.CreateProgramFromSource(vSrc, fSrc)`	Compile shaders and link into a program.
`Context.BufferData(target, data, usage)`	Upload data to a buffer object.
`Context.BufferDataFloat32(target, data, usage)`	Upload float32 slice data via `js.Float32Array`.
`Context.CreateBuffer()`	Create a buffer object.
`Context.BindBuffer(target, buffer)`	Bind a buffer to a target.
`Context.CreateTexture()`	Create a texture object.
`Context.BindTexture(target, tex)`	Bind a texture to a target.
`Context.ActiveTexture(texUnit)`	Select the active texture unit.
`Context.TexParameteri(target, pname, param)`	Set texture parameters.
`Context.TexImage2D(target, lvl, ifmt, w, h, border, fmt, typ, pixels)`	Upload pixel data to a texture.
`Context.TexImage2DFromImage(target, lvl, ifmt, fmt, typ, img)`	Upload an image/video/canvas to a texture.
`Context.LoadTexture2D(img)`	Create and initialize a 2D texture from an image.
`Context.EnableVertexAttribArray(index)`	Enable a vertex attribute.
`Context.VertexAttribPointer(index,size,type,normalized,stride,offset)`	Specify vertex attribute layout.
`Context.GetAttribLocation(prog, name)`	Retrieve attribute location.
`Context.GetUniformLocation(prog, name)`	Retrieve uniform location.
`Context.Uniform2f(loc, x, y)`	Set a vec2 uniform.
`Context.Uniform4f(loc, v0,v1,v2,v3)`	Set a vec4 uniform.
`Context.Uniform1f(loc, x)`	Set a float uniform.
`Context.Enable(cap)`	Enable a WebGL capability.
`Context.BlendFunc(sfactor, dfactor)`	Define pixel blending factors.
`Context.DrawArrays(mode, first, count)`	Render primitives from array data.
`Context.CreateVertexArray()`	Create a vertex array object.

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