/**
 * @author       Richard Davey <rich@photonstorm.com>
 * @copyright    2018 Photon Storm Ltd.
 * @license      {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
 */

var GameObject = require('../../gameobjects/GameObject');

/**
 * Renders this Game Object with the WebGL Renderer to the given Camera.
 * 
 * The object will not render if any of its renderFlags are set or it is being actively filtered out by the Camera.
 * This method should not be called directly. It is a utility function of the Render module.
 * 
 * A Static Tilemap Layer renders immediately and does not use any batching.
 *
 * @method Phaser.Tilemaps.StaticTilemapLayer#renderWebGL
 * @since 3.0.0
 * @private
 *
 * @param {Phaser.Renderer.WebGL.WebGLRenderer} renderer - A reference to the current active WebGL renderer.
 * @param {Phaser.Tilemaps.StaticTilemapLayer} src - The Game Object being rendered in this call.
 * @param {number} interpolationPercentage - Reserved for future use and custom pipelines.
 * @param {Phaser.Cameras.Scene2D.Camera} camera - The Camera that is rendering the Game Object.
 */
var StaticTilemapLayerWebGLRenderer = function (renderer, src, interpolationPercentage, camera)
{
    if (GameObject.RENDER_MASK !== src.renderFlags || (src.cameraFilter > 0 && (src.cameraFilter & camera.id)))
    {
        return;
    }

    src.upload(camera);

    if (src.vertexCount > 0)
    {
        var gl = renderer.gl;
        var pipeline = this.pipeline;
        var pipelineVertexBuffer = pipeline.vertexBuffer;
    
        var frame = src.tileset.image.get();
    
        if (renderer.currentPipeline && renderer.currentPipeline.vertexCount > 0)
        {
            renderer.flush();
        }
    
        pipeline.vertexBuffer = src.vertexBuffer;
    
        renderer.setPipeline(pipeline);
    
        renderer.setTexture2D(frame.glTexture, 0);
    
        gl.drawArrays(pipeline.topology, 0, src.vertexCount);
    
        pipeline.vertexBuffer = pipelineVertexBuffer;
    
        pipeline.viewIdentity();
        pipeline.modelIdentity();
    }
};

module.exports = StaticTilemapLayerWebGLRenderer;