dolphin/Source/Core/VideoCommon/IndexGenerator.h

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// Copyright 2008 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
// This is currently only used by the DX backend, but it may make sense to
// use it in the GL backend or a future DX10 backend too.
#pragma once
#include "Common/CommonTypes.h"
#include "Common/EnumMap.h"
#include "VideoCommon/OpcodeDecoding.h"
class IndexGenerator
{
public:
void Init();
void Start(u16* index_ptr);
void AddIndices(OpcodeDecoder::Primitive primitive, u32 num_vertices);
void AddExternalIndices(const u16* indices, u32 num_indices, u32 num_vertices);
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// returns numprimitives
u32 GetNumVerts() const { return m_base_index; }
u32 GetIndexLen() const { return static_cast<u32>(m_index_buffer_current - m_base_index_ptr); }
u32 GetRemainingIndices(OpcodeDecoder::Primitive primitive) const;
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private:
u16* m_index_buffer_current = nullptr;
u16* m_base_index_ptr = nullptr;
u32 m_base_index = 0;
using PrimitiveFunction = u16* (*)(u16*, u32, u32);
Common::EnumMap<PrimitiveFunction, OpcodeDecoder::Primitive::GX_DRAW_POINTS> m_primitive_table{};
};