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 
23 namespace 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