TIL_Image.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 *
 * NAME:        TIL_Image.h (IMGUI library, C++)
 *
 * COMMENTS:
 *      Cacheable raster definition for the image viewer cache.
 */
#ifndef __TIL_Image__
#define __TIL_Image__

#include "TIL_API.h"
#include "TIL_Defines.h"
#include <UT/UT_NonCopyable.h>
#include <UT/UT_SmallObject.h>
#include <UT/UT_String.h>
#include <iosfwd>

class TIL_ImageSource;
class TIL_Plane;
class TIL_Raster;
class TIL_Lookup;
class UT_TokenString;

#define TIL_MIP_LEVELS  5

#define TIL_NO_IMAGE_MATCH      0
#define TIL_EXACT_MATCH         1
#define TIL_SCALED_MATCH        2

// describes the full state of the raster.
class TIL_API TIL_ImageState
    : public UT_SmallObject<TIL_ImageState,
                            UT_SMALLOBJECT_CLEANPAGES_OFF, 128,
                            UT_SMALLOBJECT_THREADSAFE_ON>
{
public:
                         TIL_ImageState();
                         TIL_ImageState(const TIL_ImageState &) = delete;
                        ~TIL_ImageState();

    int64               getMemoryUsage(bool inclusive) const;

    void                setSource(TIL_ImageSource *source);

    TIL_ImageState &    operator=(const TIL_ImageState &);
    int                 operator==(const TIL_ImageState &) const;
    int                 fitsRequirements(const TIL_ImageState &,
                                         bool scaled = false) const;

    void                debugDump(std::ostream &os);
public:
    TIL_ImageSource     *mySource;
    int                  myVersion;

    UT_String            myName;
    TIL_Plane           *myPlane;
    exint                        myPlaneIndex;
    UT_TokenString      *myID;
    TIL_Packing          myPacking;
    int                  myFrameIndex;

    float                myBlack, myWhite;
    
    exint                        myXRes, myYRes;
    int                  myFullImage;
    exint                        myStartU;
    exint                        myEndU;
    exint                        myStartV;
    exint                        myEndV;
    float                myGamma;
    float                myAspect;
    float                myVAspect;
    bool                 mySolidAlpha;
};


class TIL_API TIL_Image
    : public UT_SmallObject<TIL_Image,
                            UT_SMALLOBJECT_CLEANPAGES_OFF, 256,
                            UT_SMALLOBJECT_THREADSAFE_ON>
{
public:
         TIL_Image();
        ~TIL_Image();

         UT_NON_COPYABLE(TIL_Image)

    void                setRaster(TIL_Raster *r);
    TIL_Raster          *getRaster()             { return myMipRasters[0]; }
    TIL_Raster         **getMipRasters()         { return myMipRasters; }
    void                clearRasters();

    void                setState(TIL_ImageState *state);
    TIL_ImageState      *getState()              { return myState; }
    
    TIL_Image          *&next()                  { return myNext; }
    TIL_Image          *&prev()                  { return myPrev; }

    void                incRef();
    void                decRef();
    int                 inUse() const;
    void                clearUsage();
    void                setObsolete(bool o = true) { myObsoleteFlag = o; }
    bool                isObsolete() const { return myObsoleteFlag; }

    int64               getMemoryUsage(bool inclusive) const;

    void                debugDump(std::ostream &os);
    
private:
    // the image raster.
    TIL_Raster          *myMipRasters[TIL_MIP_LEVELS];
 
    // raster identification.
    TIL_ImageState      *myState;

    // don't touch.
    TIL_Image           *myNext;
    TIL_Image           *myPrev;
    int                  myRefCount;
    bool                 myObsoleteFlag;
};



#endif