mirror of
https://github.com/photonstorm/phaser
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79 lines
2.5 KiB
JavaScript
79 lines
2.5 KiB
JavaScript
/**
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* @author Richard Davey <rich@photonstorm.com>
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* @copyright 2018 Photon Storm Ltd.
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* @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
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*/
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/**
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* Renders this Game Object with the Canvas Renderer to the given Camera.
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* The object will not render if any of its renderFlags are set or it is being actively filtered out by the Camera.
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* This method should not be called directly. It is a utility function of the Render module.
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*
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* @method Phaser.Tilemaps.DynamicTilemapLayer#renderCanvas
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* @since 3.0.0
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* @private
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*
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* @param {Phaser.Renderer.Canvas.CanvasRenderer} renderer - A reference to the current active Canvas renderer.
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* @param {Phaser.Tilemaps.DynamicTilemapLayer} src - The Game Object being rendered in this call.
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* @param {number} interpolationPercentage - Reserved for future use and custom pipelines.
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* @param {Phaser.Cameras.Scene2D.Camera} camera - The Camera that is rendering the Game Object.
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*/
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var DynamicTilemapLayerCanvasRenderer = function (renderer, src, interpolationPercentage, camera)
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{
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src.cull(camera);
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var renderTiles = src.culledTiles;
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var length = renderTiles.length;
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var image = src.tileset.image.getSourceImage();
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var tileset = this.tileset;
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var tx = src.x - camera.scrollX * src.scrollFactorX;
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var ty = src.y - camera.scrollY * src.scrollFactorY;
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var ctx = renderer.currentContext;
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ctx.save();
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ctx.translate(tx, ty);
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ctx.rotate(src.rotation);
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ctx.scale(src.scaleX, src.scaleY);
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ctx.scale(src.flipX ? -1 : 1, src.flipY ? -1 : 1);
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for (var index = 0; index < length; ++index)
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{
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var tile = renderTiles[index];
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var tileTexCoords = tileset.getTileTextureCoordinates(tile.index);
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if (tileTexCoords === null) { continue; }
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var halfWidth = tile.width / 2;
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var halfHeight = tile.height / 2;
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ctx.save();
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ctx.translate(tile.pixelX + halfWidth, tile.pixelY + halfHeight);
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if (tile.rotation !== 0)
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{
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ctx.rotate(tile.rotation);
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}
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if (tile.flipX || tile.flipY)
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{
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ctx.scale(tile.flipX ? -1 : 1, tile.flipY ? -1 : 1);
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}
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ctx.globalAlpha = camera.alpha * src.alpha * tile.alpha;
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ctx.drawImage(
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image,
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tileTexCoords.x, tileTexCoords.y,
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tile.width, tile.height,
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-halfWidth, -halfHeight,
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tile.width, tile.height
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);
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ctx.restore();
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}
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ctx.restore();
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};
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module.exports = DynamicTilemapLayerCanvasRenderer;
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