quyse/flaw

// current WebGL context
var h$flaw_webgl_context = null;

// get WebGL context from canvas
function h$flaw_webgl_get_canvas_context(canvas, needDepth) {
    var settings =
        { alpha: false
        , depth: needDepth
        , stencil: false
        , antialias: true
        };
    return canvas.getContext('webgl', settings)
        || canvas.getContext('experimental-webgl', settings);
}

// set number of draw buffers in framebuffer
function h$flaw_webgl_glDrawBuffers_n(n) {
    var buffers = [];
    for(var i = 0; i < n; ++i)
        buffers.push(h$flaw_wegbl_context.COLOR_ATTACHMENT + i);
    h$flaw_webgl_context.drawBuffers(buffers);
}

var h$requestAnimationFrame
    = window.requestAnimationFrame
    || window.webkitRequestAnimationFrame
    || window.mozRequestAnimationFrame
    || window.msRequestAnimationFrame
    ;