GR/GR_ColorLookupMgr.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:
 *      Side Effects Software Inc.
 *      477 Richmond Street West
 *      Toronto, Ontario
 *      Canada   M5V 3E7
 *      416-504-9876
 *
 * NAME:        GR_ColorLookupMgr.h (GR library, C++)
 *
 * COMMENTS:    
 *
 */

#ifndef __GR_ColorLookupMgr_h__
#define __GR_ColorLookupMgr_h__

#include "GR_API.h"

#include <UT/UT_SymbolTable.h>
#include <UT/UT_PtrArray.h>

class GB_Attribute;
class gr_ColorLookupInfo;

class GR_API GR_ColorLookupMgr
{
public:
    // A function used to translate an attribute value into a three component
    // color.
    typedef const float *(*ColorLookupFunc)(const void *data);

    // A function used to return an appropriate ColorLookupFunc for the
    // given attribute.
    typedef ColorLookupFunc (*TypeEntryFunc)(const GB_Attribute *);

     GR_ColorLookupMgr();
    ~GR_ColorLookupMgr();

    bool registerType(const char *token, TypeEntryFunc entry_function);

    int findType(const char *token) const;

    TypeEntryFunc       getEntryFunction(int type_index) const;

    int                 getNumTypes() const { return myTypes.entries(); }
    const char *        getTypeName(int i) const;

private:
    UT_SymbolTable                      myTable;
    UT_PtrArray<gr_ColorLookupInfo *>   myTypes;
};

GR_API extern GR_ColorLookupMgr *GRgetColorLookupMgr();

#endif // __GR_ColorLookupMgr_h__

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