1// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15#ifndef sw_Clipper_hpp
16#define sw_Clipper_hpp
17
18namespace sw
19{
20 struct DrawCall;
21 struct Polygon;
22 struct float4;
23
24 struct Clipper
25 {
26 enum ClipFlags
27 {
28 // Indicates the vertex is outside the respective frustum plane
29 CLIP_RIGHT = 1 << 0,
30 CLIP_TOP = 1 << 1,
31 CLIP_FAR = 1 << 2,
32 CLIP_LEFT = 1 << 3,
33 CLIP_BOTTOM = 1 << 4,
34 CLIP_NEAR = 1 << 5,
35
36 CLIP_FRUSTUM = 0x003F,
37
38 CLIP_FINITE = 1 << 7, // All position coordinates are finite
39 };
40
41 static unsigned int ComputeClipFlags(const float4 &v);
42 static bool Clip(Polygon &polygon, int clipFlagsOr, const DrawCall &draw);
43 };
44}
45
46#endif // sw_Clipper_hpp
47