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Timothee 'TTimo' Besset
2011-11-22 15:28:15 -06:00
commit fb1609f554
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neo/renderer/MegaTexture.h Normal file
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/*
===========================================================================
Doom 3 GPL Source Code
Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company.
This file is part of the Doom 3 GPL Source Code (?Doom 3 Source Code?).
Doom 3 Source Code is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Doom 3 Source Code is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Doom 3 Source Code. If not, see <http://www.gnu.org/licenses/>.
In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code. If not, please request a copy in writing from id Software at the address below.
If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
===========================================================================
*/
class idTextureTile {
public:
int x, y;
};
static const int TILE_PER_LEVEL = 4;
static const int MAX_MEGA_CHANNELS = 3; // normal, diffuse, specular
static const int MAX_LEVELS = 12;
static const int MAX_LEVEL_WIDTH = 512;
static const int TILE_SIZE = MAX_LEVEL_WIDTH / TILE_PER_LEVEL;
class idMegaTexture;
class idTextureLevel {
public:
idMegaTexture *mega;
int tileOffset;
int tilesWide;
int tilesHigh;
idImage *image;
idTextureTile tileMap[TILE_PER_LEVEL][TILE_PER_LEVEL];
float parms[4];
void UpdateForCenter( float center[2] );
void UpdateTile( int localX, int localY, int globalX, int globalY );
void Invalidate();
};
typedef struct {
int tileSize;
int tilesWide;
int tilesHigh;
} megaTextureHeader_t;
class idMegaTexture {
public:
bool InitFromMegaFile( const char *fileBase );
void SetMappingForSurface( const srfTriangles_t *tri ); // analyzes xyz and st to create a mapping
void BindForViewOrigin( const idVec3 origin ); // binds images and sets program parameters
void Unbind(); // removes texture bindings
static void MakeMegaTexture_f( const idCmdArgs &args );
private:
friend class idTextureLevel;
void SetViewOrigin( const idVec3 origin );
static void GenerateMegaMipMaps( megaTextureHeader_t *header, idFile *file );
static void GenerateMegaPreview( const char *fileName );
idFile *fileHandle;
const srfTriangles_t *currentTriMapping;
idVec3 currentViewOrigin;
float localViewToTextureCenter[2][4];
int numLevels;
idTextureLevel levels[MAX_LEVELS]; // 0 is the highest resolution
megaTextureHeader_t header;
static idCVar r_megaTextureLevel;
static idCVar r_showMegaTexture;
static idCVar r_showMegaTextureLabels;
static idCVar r_skipMegaTexture;
static idCVar r_terrainScale;
};