lldynamictexture.h

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#ifndef LL_LLDYNAMICTEXTURE_H
#define LL_LLDYNAMICTEXTURE_H

#include "llgl.h"
#include "linked_lists.h"
#include "llcamera.h"
#include "llcoord.h"
#include "llimagegl.h"

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

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

        S32                     getOriginX()    { return mOrigin.mX; }
        S32                     getOriginY()    { return mOrigin.mY; }
        S32                     getWidth()              { return mWidth; }
        S32                     getHeight()             { return mHeight; }
        S32                     getComponents() { return mComponents; }
        S32                     getSize()               { return mWidth * mHeight * mComponents; }

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

        static BOOL     updateAllInstances();

        static void destroyGL();
        static void restoreGL();

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

protected:
        S32 mWidth;
        S32 mHeight;
        S32 mComponents;
        LLPointer<LLImageGL> mTexture;
        F32 mLastBindTime;
        BOOL mClamp;
        LLCoordGL mOrigin;

        LLCamera mCamera;
        static LLLinkedList<LLDynamicTexture> sInstances[ LLDynamicTexture::ORDER_COUNT ];
        static S32 sNumRenders;
};

#endif

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