citra/src/video_core/primitive_assembly.h

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// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
#pragma once
#include <functional>
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#include "video_core/pica.h"
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namespace Pica {
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/*
* 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(VertexType& v0,
VertexType& v1,
VertexType& v2)>;
PrimitiveAssembler(Regs::TriangleTopology topology);
/*
* 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(VertexType& vtx, TriangleHandler triangle_handler);
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/**
* Resets the internal state of the PrimitiveAssembler.
*/
void Reset();
/**
* Reconfigures the PrimitiveAssembler to use a different triangle topology.
*/
void Reconfigure(Regs::TriangleTopology topology);
private:
Regs::TriangleTopology topology;
int buffer_index;
VertexType buffer[2];
bool strip_ready = false;
};
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} // namespace