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/**
* @file lltexture.h
* @brief LLTexture definition
*
* This class acts as a wrapper for OpenGL calls.
* The goal of this class is to minimize the number of api calls due to legacy rendering
* code, to define an interface for a multiple rendering API abstraction of the UI
* rendering, and to abstract out direct rendering calls in a way that is cleaner and easier to maintain.
*
* $LicenseInfo:firstyear=2001&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#ifndef LL_TEXTURE_H
#define LL_TEXTURE_H
#include "llrefcount.h"
class LLImageGL ;
class LLTexUnit ;
class LLFontGL ;
//
//this is an abstract class as the parent for the class LLViewerTexture
//through the following virtual functions, the class LLViewerTexture can be reached from /llrender.
//
class LLTexture : public LLRefCount
{
friend class LLTexUnit ;
friend class LLFontGL ;
protected:
virtual ~LLTexture();
public:
LLTexture(){}
//
//interfaces to access LLViewerTexture
//
virtual S8 getType() const = 0 ;
virtual void setKnownDrawSize(S32 width, S32 height) = 0 ;
virtual bool bindDefaultImage(const S32 stage = 0) = 0 ;
virtual void forceImmediateUpdate() = 0 ;
virtual void setActive() = 0 ;
virtual S32 getWidth(S32 discard_level = -1) const = 0 ;
virtual S32 getHeight(S32 discard_level = -1) const = 0 ;
private:
//note: do not make this function public.
virtual LLImageGL* getGLTexture() const = 0 ;
virtual void updateBindStatsForTester() = 0 ;
};
#endif
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