irr/include/CIndexBuffer.h

   1 // Copyright (C) 2002-2012 Nikolaus Gebhardt
   2 // This file is part of the "Irrlicht Engine".
   3 // For conditions of distribution and use, see copyright notice in irrlicht.h
   4
   5 #pragma once
   6
   7 #include <vector>
   8 #include "IIndexBuffer.h"
   9
  10 // Define to receive warnings when violating the hw mapping hints
  11 //#define INDEXBUFFER_HINT_DEBUG
  12
  13 #ifdef INDEXBUFFER_HINT_DEBUG
  14 #include "../src/os.h"
  15 #endif
  16
  17 namespace irr
  18 {
  19 namespace scene
  20 {
  21 //! Template implementation of the IIndexBuffer interface
  22 template <class T>
  23 class CIndexBuffer final : public IIndexBuffer
  24 {
  25 public:
  26         //! Default constructor for empty buffer
  27         CIndexBuffer()
  28         {
  29 #ifdef _DEBUG
  30                 setDebugName("CIndexBuffer");
  31 #endif
  32         }
  33
  34         video::E_INDEX_TYPE getType() const override
  35         {
  36                 static_assert(sizeof(T) == 2 || sizeof(T) == 4, "invalid index type");
  37                 return sizeof(T) == 2 ? video::EIT_16BIT : video::EIT_32BIT;
  38         }
  39
  40         const void *getData() const override
  41         {
  42                 return Data.data();
  43         }
  44
  45         void *getData() override
  46         {
  47                 return Data.data();
  48         }
  49
  50         u32 getCount() const override
  51         {
  52                 return static_cast<u32>(Data.size());
  53         }
  54
  55         E_HARDWARE_MAPPING getHardwareMappingHint() const override
  56         {
  57                 return MappingHint;
  58         }
  59
  60         void setHardwareMappingHint(E_HARDWARE_MAPPING NewMappingHint) override
  61         {
  62                 MappingHint = NewMappingHint;
  63         }
  64
  65         void setDirty() override
  66         {
  67                 ++ChangedID;
  68 #ifdef INDEXBUFFER_HINT_DEBUG
  69                 if (MappingHint == EHM_STATIC && HWBuffer) {
  70                         char buf[100];
  71                         snprintf_irr(buf, sizeof(buf), "CIndexBuffer @ %p modified, but it has a static hint", this);
  72                         os::Printer::log(buf, ELL_WARNING);
  73                 }
  74 #endif
  75         }
  76
  77         u32 getChangedID() const override { return ChangedID; }
  78
  79         void setHWBuffer(void *ptr) const override
  80         {
  81                 HWBuffer = ptr;
  82         }
  83
  84         void *getHWBuffer() const override
  85         {
  86                 return HWBuffer;
  87         }
  88
  89         u32 ChangedID = 1;
  90
  91         //! hardware mapping hint
  92         E_HARDWARE_MAPPING MappingHint = EHM_NEVER;
  93         mutable void *HWBuffer = nullptr;
  94
  95         //! Indices of this buffer
  96         std::vector<T> Data;
  97 };
  98
  99 //! Standard 16-bit buffer
 100 typedef CIndexBuffer<u16> SIndexBuffer;
 101
 102 } // end namespace scene
 103 } // end namespace irr