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// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef sw_Clipper_hpp
#define sw_Clipper_hpp
#include "System/Types.hpp"
namespace sw {
struct DrawCall;
struct Polygon;
struct Clipper
{
enum ClipFlags
{
// Indicates the vertex is outside the respective frustum plane
CLIP_RIGHT = 1 << 0,
CLIP_TOP = 1 << 1,
CLIP_FAR = 1 << 2,
CLIP_LEFT = 1 << 3,
CLIP_BOTTOM = 1 << 4,
CLIP_NEAR = 1 << 5,
CLIP_FRUSTUM = 0x003F,
CLIP_FINITE = 1 << 7, // All position coordinates are finite
};
static unsigned int ComputeClipFlags(const float4 &v);
static bool Clip(Polygon &polygon, int clipFlagsOr, const DrawCall &draw);
};
} // namespace sw
#endif // sw_Clipper_hpp