citra/src/video_core/primitive_assembly.h
Hamish Milne d5a962cb81
Fix savestates compatibility (#5256)
* Fix savestates compatibility
2020-04-20 16:21:37 +02:00

80 lines
2.3 KiB
C++

// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <array>
#include <functional>
#include <boost/serialization/access.hpp>
#include <boost/serialization/array.hpp>
#include "video_core/regs_pipeline.h"
namespace Pica {
/*
* Utility class to build triangles from a series of vertices,
* according to a given triangle topology.
*/
template <typename VertexType>
struct PrimitiveAssembler {
using TriangleHandler =
std::function<void(const VertexType& v0, const VertexType& v1, const VertexType& v2)>;
explicit PrimitiveAssembler(
PipelineRegs::TriangleTopology topology = PipelineRegs::TriangleTopology::List);
/*
* Queues a vertex, builds primitives from the vertex queue according to the given
* triangle topology, and calls triangle_handler for each generated primitive.
* NOTE: We could specify the triangle handler in the constructor, but this way we can
* keep event and handler code next to each other.
*/
void SubmitVertex(const VertexType& vtx, const TriangleHandler& triangle_handler);
/**
* Invert the vertex order of the next triangle. Called by geometry shader emitter.
* This only takes effect for TriangleTopology::Shader.
*/
void SetWinding();
/**
* Resets the internal state of the PrimitiveAssembler.
*/
void Reset();
/**
* Reconfigures the PrimitiveAssembler to use a different triangle topology.
*/
void Reconfigure(PipelineRegs::TriangleTopology topology);
/**
* Returns whether the PrimitiveAssembler has an empty internal buffer.
*/
bool IsEmpty() const;
/**
* Returns the current topology.
*/
PipelineRegs::TriangleTopology GetTopology() const;
private:
PipelineRegs::TriangleTopology topology;
int buffer_index = 0;
std::array<VertexType, 2> buffer;
bool strip_ready = false;
bool winding = false;
template <class Archive>
void serialize(Archive& ar, const unsigned int version) {
ar& topology;
ar& buffer_index;
ar& boost::serialization::make_array(buffer.data(), buffer.size());
ar& strip_ready;
ar& winding;
}
friend class boost::serialization::access;
};
} // namespace Pica