gl2d/rendering/renderer.js

2D graphics package for WebGL

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
/**
 * Helper class for rendering graphics with WebGL.
 */
var Renderer = (function () {
    /**
     * Creates a new rendering object.
     * @param the WebGL rendering context to use.
     * @param camera the camera that should be used.
     */
    function Renderer(gl, camera) {
        this.gl = gl;
        this.camera = camera;
    }
    /**
     * Called whenever the canvas size changes.
     * @param width the new width of the canvas.
     * @param height the new height of the canvas.
     */
    Renderer.prototype.onSurfaceChanged = function (width, height) {
        // Update the viewport to match the new dimensions of the drawing buffer
        this.gl.viewport(0, 0, width, height);
        // Adjust camera to viewport
        this.camera.setViewport(width, height);
    };
    /**
     * Binds the specified program to the WebGL rendering context, if not already bound.
     * @param program the program to bind.
     */
    Renderer.prototype.attachProgram = function (program) {
        // If the program is not already being used
        if (this.currentProgram !== program) {
            // Start using it
            this.gl.useProgram(program.location);
            // Notify detached program
            if (this.currentProgram) {
                this.currentProgram.onDetach(this);
            }
            // Notify attached program
            program.onAttach(this);
            // Keep track of the current program
            this.currentProgram = program;
        }
    };
    return Renderer;
}());
exports.Renderer = Renderer;
;
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