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_VertexRoutine_hpp
16#define sw_VertexRoutine_hpp
17
18#include "Renderer/Color.hpp"
19#include "Renderer/VertexProcessor.hpp"
20#include "ShaderCore.hpp"
21#include "VertexShader.hpp"
22
23namespace sw
24{
25	class VertexRoutinePrototype : public Function<Void(Pointer<Byte>, Pointer<Byte>, Pointer<Byte>, Pointer<Byte>)>
26	{
27	public:
28		VertexRoutinePrototype() : vertex(Arg<0>()), batch(Arg<1>()), task(Arg<2>()), data(Arg<3>()) {}
29		virtual ~VertexRoutinePrototype() {};
30
31	protected:
32		Pointer<Byte> vertex;
33		Pointer<Byte> batch;
34		Pointer<Byte> task;
35		Pointer<Byte> data;
36	};
37
38	class VertexRoutine : public VertexRoutinePrototype
39	{
40	public:
41		VertexRoutine(const VertexProcessor::State &state, const VertexShader *shader);
42		virtual ~VertexRoutine();
43
44		void generate();
45
46	protected:
47		Pointer<Byte> constants;
48
49		Int clipFlags;
50
51		RegisterArray<MAX_VERTEX_INPUTS> v;    // Input registers
52		RegisterArray<MAX_VERTEX_OUTPUTS> o;   // Output registers
53
54		const VertexProcessor::State &state;
55
56	private:
57		virtual void pipeline(UInt &index) = 0;
58
59		typedef VertexProcessor::State::Input Stream;
60
61		Vector4f readStream(Pointer<Byte> &buffer, UInt &stride, const Stream &stream, const UInt &index);
62		void readInput(UInt &index);
63		void computeClipFlags();
64		void postTransform();
65		void writeCache(Pointer<Byte> &cacheLine);
66		void writeVertex(const Pointer<Byte> &vertex, Pointer<Byte> &cacheLine);
67		void transformFeedback(const Pointer<Byte> &vertex, const UInt &primitiveNumber, const UInt &indexInPrimitive);
68	};
69}
70
71#endif   // sw_VertexRoutine_hpp
72