1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16package com.example.android.rs.vr.engine;
17
18/**
19 * The interface to the vr rendering pipeline
20 * This defines the various rendering stages that the system goes through
21 */
22public interface Pipeline {
23    /**
24     * cancel the current execution
25     */
26    public void cancel();
27
28    /**
29     * @return true if the rendering was canceled the output is not valid if true
30     */
31    public boolean isCancel();
32
33    /**
34     * The pipline uses this stage to setup buffers it needs
35     * @param state
36     */
37    public void initBuffers(VrState state);
38
39    /**
40     * This stage does needed transformations on the triangles to screen space
41     * @param state
42     */
43    public void setupTriangles(VrState state);
44
45    /**
46     * This stage converts triangles into buffers used in the raycast
47     * @param state
48     */
49    public void rasterizeTriangles(VrState state);
50
51    /**
52     * This stage generates the final image
53     * @param state
54     */
55    public void raycast(VrState state);
56}
57