nel/src/3d/texture_near.cpp

   1 // NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
   2 // Copyright (C) 2010  Winch Gate Property Limited
   3 //
   4 // This program is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU Affero General Public License as
   6 // published by the Free Software Foundation, either version 3 of the
   7 // License, or (at your option) any later version.
   8 //
   9 // This program is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU Affero General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU Affero General Public License
  15 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 #include "std3d.h"
  18 #include "nel/3d/texture_near.h"
  19
  20 using namespace NLMISC;
  21
  22 #ifdef DEBUG_NEW
  23 #define new DEBUG_NEW
  24 #endif
  25
  26 namespace NL3D
  27 {
  28
  29
  30 // ***************************************************************************
  31 CTextureNear::CTextureNear(sint size)
  32 {
  33         nlassert(size>=NL_TILE_LIGHTMAP_SIZE);
  34         nlassert(NLMISC::isPowerOf2(size));
  35
  36         // The near texture always reside in memory...
  37         // NB: this is simplier like that, and this is not a problem, since only 1 or 2 Mo are allocated :o)
  38         setReleasable(false);
  39         // create the bitmap.
  40         CBitmap::resize(size, size, CBitmap::RGBA);
  41         // Format of texture, 32 bits and no mipmaps.
  42         setUploadFormat(ITexture::RGBA8888);
  43         setFilterMode(ITexture::Linear, ITexture::LinearMipMapOff);
  44
  45         // Fill the array of free tiles.
  46         uint    nbTilesByLine= size/NL_TILE_LIGHTMAP_SIZE;
  47         _FreeTiles.resize(nbTilesByLine*nbTilesByLine);
  48         _AvailableTiles.resize(nbTilesByLine*nbTilesByLine);
  49         for(sint i=0;i<(sint)_FreeTiles.size();i++)
  50         {
  51                 // This tile is free!!
  52                 _FreeTiles[i]=i;
  53                 _AvailableTiles[i]= true;
  54         }
  55
  56 }
  57
  58 // ***************************************************************************
  59 sint                    CTextureNear::getNbAvailableTiles()
  60 {
  61         return (sint)_FreeTiles.size();
  62 }
  63 // ***************************************************************************
  64 uint                    CTextureNear::getTileAndFillRect(CRGBA  map[NL_TILE_LIGHTMAP_SIZE*NL_TILE_LIGHTMAP_SIZE])
  65 {
  66         nlassert(getNbAvailableTiles()>0);
  67         uint    id= _FreeTiles.back();
  68         // This tile is now more free.
  69         _AvailableTiles[id]= false;
  70         _FreeTiles.pop_back();
  71
  72         // Fill the texture
  73         refillRect(id, map);
  74
  75         return id;
  76 }
  77
  78 // ***************************************************************************
  79 void                    CTextureNear::refillRect(uint id, CRGBA  map[NL_TILE_LIGHTMAP_SIZE*NL_TILE_LIGHTMAP_SIZE])
  80 {
  81         uint    dstWidth= getWidth();
  82         // Copy the map into the texture
  83         uint    nbTilesByLine= dstWidth/NL_TILE_LIGHTMAP_SIZE;
  84         uint    s= id% nbTilesByLine;
  85         uint    t= id/ nbTilesByLine;
  86         s*= NL_TILE_LIGHTMAP_SIZE;
  87         t*= NL_TILE_LIGHTMAP_SIZE;
  88         CRGBA   *src= map;
  89         CRGBA   *dst= (CRGBA*)getPixels().getPtr();
  90         dst+= t*dstWidth+s;
  91         for(sint n= NL_TILE_LIGHTMAP_SIZE;n>0;n--, src+= NL_TILE_LIGHTMAP_SIZE, dst+= dstWidth)
  92         {
  93                 memcpy(dst, src, NL_TILE_LIGHTMAP_SIZE*sizeof(CRGBA));
  94         }
  95
  96         // Invalidate the rectangle.
  97         ITexture::touchRect(CRect(s, t, NL_TILE_LIGHTMAP_SIZE, NL_TILE_LIGHTMAP_SIZE));
  98 }
  99
 100 // ***************************************************************************
 101 void                    CTextureNear::releaseTile(uint id)
 102 {
 103         nlassert(!_AvailableTiles[id]);
 104         // This tile is now free.
 105         _AvailableTiles[id]= true;
 106         // insert this tile at the end of the free list.
 107         _FreeTiles.push_back(id);
 108 }
 109
 110
 111 } // NL3D