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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_VertexShader_hpp
#define sw_VertexShader_hpp
#include "Shader.hpp"
#include "Main/Config.hpp"
namespace sw
{
class VertexShader : public Shader
{
public:
enum AttribType : unsigned char
{
ATTRIBTYPE_FLOAT,
ATTRIBTYPE_INT,
ATTRIBTYPE_UINT,
ATTRIBTYPE_LAST = ATTRIBTYPE_UINT
};
explicit VertexShader(const VertexShader *vs = 0);
explicit VertexShader(const unsigned long *token);
virtual ~VertexShader();
static int validate(const unsigned long *const token); // Returns number of instructions if valid
bool containsTextureSampling() const;
void setInput(int inputIdx, const Semantic& semantic, AttribType attribType = ATTRIBTYPE_FLOAT);
void setOutput(int outputIdx, int nbComponents, const Semantic& semantic);
void setPositionRegister(int posReg);
void setPointSizeRegister(int ptSizeReg);
void declareInstanceId() { instanceIdDeclared = true; }
void declareVertexId() { vertexIdDeclared = true; }
const Semantic& getInput(int inputIdx) const;
const Semantic& getOutput(int outputIdx, int component) const;
AttribType getAttribType(int inputIndex) const;
int getPositionRegister() const { return positionRegister; }
int getPointSizeRegister() const { return pointSizeRegister; }
bool isInstanceIdDeclared() const { return instanceIdDeclared; }
bool isVertexIdDeclared() const { return vertexIdDeclared; }
private:
void analyze();
void analyzeInput();
void analyzeOutput();
void analyzeTextureSampling();
Semantic input[MAX_VERTEX_INPUTS];
Semantic output[MAX_VERTEX_OUTPUTS][4];
AttribType attribType[MAX_VERTEX_INPUTS];
int positionRegister;
int pointSizeRegister;
bool instanceIdDeclared;
bool vertexIdDeclared;
bool textureSampling;
};
}
#endif // sw_VertexShader_hpp