copyTextureToTexture( srcTexture, dstTexture, srcRegion = null, dstPosition = null, srcLevel = 0, dstLevel = 0 ) {

		this._textures.updateTexture( srcTexture );
		this._textures.updateTexture( dstTexture );

		this.backend.copyTextureToTexture( srcTexture, dstTexture, srcRegion, dstPosition, srcLevel, dstLevel );

	}
Copies data of the given source texture into a destination texture.

@param {Texture} srcTexture - The source texture.
@param {Texture} dstTexture - The destination texture.
@param {Box2|Box3} [srcRegion=null] - A bounding box which describes the source region. Can be two or three-dimensional.
@param {Vector2|Vector3} [dstPosition=null] - A vector that represents the origin of the destination region. Can be two or three-dimensional.
@param {number} [srcLevel=0] - The source mip level to copy from.
@param {number} [dstLevel=0] - The destination mip level to copy to.