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/**
 * @file lldynamictexture.h
 * @brief Implementation of LLViewerDynamicTexture class
 *
 * $LicenseInfo:firstyear=2002&license=viewerlgpl$
 * 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_LLDYNAMICTEXTURE_H
#define LL_LLDYNAMICTEXTURE_H

#include "llcamera.h"
#include "llgl.h"
#include "llcoord.h"
#include "llviewertexture.h"
#include "llcamera.h"

class LLViewerDynamicTexture : public LLViewerTexture
{
    LL_ALIGN_NEW
public:

    enum
    {
        LL_VIEWER_DYNAMIC_TEXTURE = LLViewerTexture::DYNAMIC_TEXTURE,
        LL_TEX_LAYER_SET_BUFFER = LLViewerTexture::INVALID_TEXTURE_TYPE + 1,
        LL_VISUAL_PARAM_HINT,
        LL_VISUAL_PARAM_RESET,
        LL_PREVIEW_ANIMATION,
        LL_IMAGE_PREVIEW_SCULPTED,
        LL_IMAGE_PREVIEW_AVATAR,
        INVALID_DYNAMIC_TEXTURE
    };

protected:
    /*virtual*/ ~LLViewerDynamicTexture();

public:
    enum EOrder { ORDER_FIRST = 0, ORDER_MIDDLE = 1, ORDER_LAST = 2, ORDER_RESET = 3, ORDER_COUNT = 4 };

    LLViewerDynamicTexture(S32 width,
                     S32 height,
                     S32 components,        // = 4,
                     EOrder order,          // = ORDER_MIDDLE,
                     BOOL clamp);

    /*virtual*/ S8 getType() const ;

    S32         getOriginX() const  { return mOrigin.mX; }
    S32         getOriginY() const  { return mOrigin.mY; }

    S32         getSize()       { return mFullWidth * mFullHeight * mComponents; }

    virtual BOOL needsRender() { return TRUE; }
    virtual void preRender(BOOL clear_depth = TRUE);
    virtual BOOL render();
    virtual void postRender(BOOL success);

    virtual void restoreGLTexture() {}
    virtual void destroyGLTexture() {}

    static BOOL updateAllInstances();
    static void destroyGL() ;
    static void restoreGL() ;

    void setBoundTarget(LLRenderTarget* target) { mBoundTarget = target; }

protected:
    void generateGLTexture();
    void generateGLTexture(LLGLint internal_format, LLGLenum primary_format, LLGLenum type_format, BOOL swap_bytes = FALSE);

protected:
    BOOL mClamp;
    LLCoordGL mOrigin;
    LL_ALIGN_16(LLCamera mCamera);

    LLRenderTarget* mBoundTarget;

    typedef std::set<LLViewerDynamicTexture*> instance_list_t;
    static instance_list_t sInstances[ LLViewerDynamicTexture::ORDER_COUNT ];
    static S32 sNumRenders;
};

#endif