TIL/TIL_Region.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.
 *
 * Produced by:
 *      Mark Alexander
 *      Side Effects Software Inc
 *      477 Richmond Street West
 *      Toronto, Ontario
 *      Canada   M5V 3E7
 *      416-504-9876
 *
 * NAME:        TIL_Region.h    (Tile Image Library, C++)
 *
 * COMMENTS:
 *      Handles arbitrary sized regions of planes, for algorithms that
 *      require more information than just a tile.
 */
#ifndef TIL_REGION_H
#define TIL_REGION_H

#include "TIL_API.h"
#include "TIL_Defines.h"

#include <UT/UT_SmallObject.h>

class TIL_Plane;
class TIL_Tile;
class TIL_TileList;

enum TIL_RegionExtend
{
    TIL_BLACK           = 0,
    TIL_HOLD_LEFT       = 0x1,
    TIL_HOLD_RIGHT      = 0x2,
    TIL_HOLD_TOP        = 0x4,
    TIL_HOLD_BOTTOM     = 0x8,
    TIL_HOLD            = 0xF
};

class TIL_API TIL_Region
    : public UT_SmallObject<TIL_Region,
                            UT_SMALLOBJECT_CLEANPAGES_OFF, 32,
                            UT_SMALLOBJECT_THREADSAFE_ON, 1024>
{
public:
    // Do NOT derive classes from this method, or add virtual functions.
    
    // region allocation routines.
    static TIL_Region   *allocRegion();
    static void          freeRegion(TIL_Region *&freeme);

   
    void        init(const TIL_Plane *parent, int input_index,
                     int array_index, float time, int xres, int yres,
                     int x1, int y1, int x2, int y2,
                     int bx1, int by1, int bx2, int by2,
                     TIL_RegionExtend hold = TIL_BLACK,
                     int share_count = 1, int nid = 0,
                     bool output = false, int xpad = 0);

    void        reset();

    // sets the image data to zero. Does not set the constant flags.
    void        clear();
    
    int         getID() const { return myID; }
    int         getNodeID() const { return myNodeID; }
    
    // call to init and destroy (regions are ref-counted). If you supply your
    // own memory regions, pass the pointers (you are responsible for freeing
    // them, unlike the automatically alloced memory which is freed for you).
    int         open(void *regionlist[PLANE_MAX_VECTOR_SIZE] = 0);
    int         close();

    // info accessors

    // identification
    const TIL_Plane     *getParent() const          { return myParent; }
    int                  getInputRef() const        { return myInputRef; }
    int                  getArrayIndex() const      { return myArrayIndex; }
    float                getTime() const            { return myCookTime; }
    void                 getRegionRes(int &x, int &y) const
                         { x=myXres; y=myYres; }
    // 
    void        getRegionBounds(int &x1, int &y1, int &x2, int &y2) const
                { x1 = myX1+myXShift; y1 = myY1+myYShift;
                  x2 = myX2+myXShift; y2 = myY2+myYShift; }

    // for output regions, allows you to mark the region as filled.
    void        markFilled(bool filled = true) { myRemainingTiles = filled ? 0 : 1; }
    
    // tells you if the regions is completely filled.
    int         isFilled() const { return myRemainingTiles == 0; }
    int         remainingTiles() const { return myRemainingTiles; }
    bool        isInitialized() const { return myRegionInit; }

    bool        workOnRegion();
    
    // tells you which tile needs to be cooked next, if 0 is returned,
    // all the remaining tiles in the process of being cooked.
    int         getNextNeededTile(int &xoff,int &yoff,
                                  int &xshift, int &yshift);

    // call when you're done filling the region with the tile recommended by
    // getNextNeededTile.
    void        finishedTile(int xoff, int yoff);

    // checks to see if the region is still constant.
    void        checkConstant(const TIL_Tile *tile, int component);
    bool        isConstantChecked() const { return myConstantChecked; }
    bool        isConstant(bool force_check = false);
    bool        isConstantValue() const;
    void        getConstantColor(float color[4]) const;
    // does not set the color for the region, only the constant flag & color.
    void        setConstantColor(float color[4]);
    
    // can't cook a tile that getNextNeededTile passed (likely due to a
    // write lock on the tile held by another thread). 
    void        rejectTile(int xoff, int yoff);

    // returns the data associated with index or component name 'compname'
    void *      getImageData(int index);
    const void *getImageData(int index) const;
    
    void *      getImageData(const char *compname);
    const void *getImageData(const char *compname) const;

    void        setImageData(void *data, int index, bool reference = true);

    // Total memory size of this region (approx). 
    int         getMemSize();

    bool        isSharedRegion() const { return myRegionShared; }
    bool        isSharedRegionDone() const { return myRegionUnshared; }
    int         getCurrentRefCount() const { return myRefCount; }
    int         getCurrentShareCount() const { return myShareCount; }
    void        unshareRegion();

    // Region hash routines - return this region's hash code.
    unsigned        getHash() const { return myHashCode; }
    
    // Return a hash code would correspond to the hash code of a region
    // created with these parms.
    static unsigned getHash(const TIL_Plane *plane, int aindex, int inref,
                            float t, int x1, int y1, int x2, int y2,
                            int xres, int yres, int nid, bool output);

    // Use these methods to get a tile list which corresponds to this region.
    // The region should be equal to or less than the current tile size.
    // Please note that the extra information in the tiles, such as the offset
    // and other information, may not be accurate.
    // Call cleanupTiles to free the tilelist. Do NOT call
    // COP2_Node::releaseTile or freeTile on this tilelist!
    TIL_TileList *getTilesFromRegion();
    void          cleanupTiles(TIL_TileList *&tiles);

    // sets the time to cook this region (mostly for output regions where you
    // want to distribute the time spent filling it across all the tiles)
    void          setWorkTime(float cooktime) { myWorkTime = cooktime; }
    float         getWorkTime() const { return myWorkTime; }
    
private:
                 TIL_Region();
                ~TIL_Region();

    void        fillOutsideData();
    float       fillOutsideBlack(unsigned char *region);
    void        fillOutsideHold(unsigned char *region);
    void        determineIfConstant();
    
private:
    // Parent plane (and allocation routine next ptr).
    union {
        const TIL_Plane *myParent;
        TIL_Region      *myNext;
    };

    // more image id.
    short            myArrayIndex;
    short            myInputRef;
    int              myID;
    int              myNodeID;
    float            myCookTime;

    // parent image res
    int              myXres, myYres;
    
    // region coordinates
    int              myX1, myY1;
    int              myX2, myY2;

    // coordinates clipped to canvas bounds
    int              myRX1, myRY1;
    int              myRX2, myRY2;

    // coordinates clipped to (0,0)->(xres-1,yres-1)
    int              myBX1, myBY1;
    int              myBX2, myBY2;

    int              myXShift, myYShift;

    // region image data
    void            *myRegion[PLANE_MAX_VECTOR_SIZE];
    void            *myRawRegion[PLANE_MAX_VECTOR_SIZE];
    char             myRegionAlloced[PLANE_MAX_VECTOR_SIZE];

    // cooperative cooking
    UT_Lock          myLock;
    int              myRefCount;
    int              myShareCount;

    int              myTileOffX;
    int              myTileOffY;
    int              myTileX2;
    int              myTileY2;
    int              myTileXCount;
    int              myTileYCount;
    int              myRemainingTiles;
    int              myAvailableTiles;
    int              myTileStride;
    unsigned char    *myTileStates;
    float            myWorkTime;

    float            myConstantColor[4];

    unsigned         myHashCode;
    unsigned int     myRegionOutside :1,
                     myHold :4,
                     myConstantChecked : 1,
                     myConstantFlag :1,
                     myConstantColorSetR : 1,
                     myConstantColorSetG : 1,
                     myConstantColorSetB : 1,
                     myConstantColorSetA : 1,
                     myRegionInit :1,
                     myRegionWorkFlag : 1,
                     myRegionShared : 1,
                     myRegionUnshared : 1;
};

#endif

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