phaser/src/tilemaps/staticlayer/StaticTilemapLayerCanvasRenderer.js
2018-02-07 16:29:48 +00:00

47 lines
1.4 KiB
JavaScript

var GameObject = require('../../GameObject');
var StaticTilemapLayerCanvasRenderer = function (renderer, gameObject, interpolationPercentage, camera)
{
if (GameObject.RENDER_MASK !== gameObject.renderFlags || (gameObject.cameraFilter > 0 && (gameObject.cameraFilter & camera._id)))
{
return;
}
gameObject.cull(camera);
var renderTiles = gameObject.culledTiles;
var tileset = this.tileset;
var ctx = renderer.gameContext;
var tileCount = renderTiles.length;
var image = tileset.image.getSourceImage();
var tx = gameObject.x - camera.scrollX * gameObject.scrollFactorX;
var ty = gameObject.y - camera.scrollY * gameObject.scrollFactorY;
ctx.save();
ctx.translate(tx, ty);
ctx.rotate(gameObject.rotation);
ctx.scale(gameObject.scaleX, gameObject.scaleY);
ctx.scale(gameObject.flipX ? -1 : 1, gameObject.flipY ? -1 : 1);
ctx.globalAlpha = gameObject.alpha;
for (var index = 0; index < tileCount; ++index)
{
var tile = renderTiles[index];
var tileTexCoords = tileset.getTileTextureCoordinates(tile.index);
if (tileTexCoords === null) { continue; }
ctx.drawImage(
image,
tileTexCoords.x, tileTexCoords.y,
tile.width, tile.height,
tile.pixelX, tile.pixelY,
tile.width, tile.height
);
}
ctx.restore();
};
module.exports = StaticTilemapLayerCanvasRenderer;