1 // Copyright 2008 Dolphin Emulator Project
2 // Licensed under GPLv2+
3 // Refer to the license.txt file included.
4 
5 // This is currently only used by the DX backend, but it may make sense to
6 // use it in the GL backend or a future DX10 backend too.
7 
8 #pragma once
9 
10 #include <array>
11 #include "Common/CommonTypes.h"
12 
13 class IndexGenerator
14 {
15 public:
16   void Init();
17   void Start(u16* index_ptr);
18 
19   void AddIndices(int primitive, u32 num_vertices);
20 
21   void AddExternalIndices(const u16* indices, u32 num_indices, u32 num_vertices);
22 
23   // returns numprimitives
GetNumVerts()24   u32 GetNumVerts() const { return m_base_index; }
GetIndexLen()25   u32 GetIndexLen() const { return static_cast<u32>(m_index_buffer_current - m_base_index_ptr); }
26   u32 GetRemainingIndices() const;
27 
28 private:
29   u16* m_index_buffer_current = nullptr;
30   u16* m_base_index_ptr = nullptr;
31   u32 m_base_index = 0;
32 
33   using PrimitiveFunction = u16* (*)(u16*, u32, u32);
34   std::array<PrimitiveFunction, 8> m_primitive_table{};
35 };
36