CWE-ou-minkata/Sources/Plasma/PubUtilLib/plGImage/plBitmap.h

/*==LICENSE==*

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Copyright (C) 2011  Cyan Worlds, Inc.

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*==LICENSE==*/
///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//  plBitmap Class Header                                                    //
//  Base bitmap class for all the types of bitmaps (mipmaps, cubic envmaps,  //
//  etc.                                                                     //
//  Cyan, Inc.                                                               //
//                                                                           //
//// Version History //////////////////////////////////////////////////////////
//                                                                           //
//  6.7.2001 mcn - Created.                                                  //
//                                                                           //
///////////////////////////////////////////////////////////////////////////////

#ifndef _plBitmap_h
#define _plBitmap_h

#include "pnKeyedObject/hsKeyedObject.h"

class hsResMgr;
class plFilterMask;
class hsGDeviceRef;

//// Class Definition /////////////////////////////////////////////////////////

class plBitmap : public hsKeyedObject
{
    public:

        //// Public Flags ////

        enum {
            kNoSpace,
            kDirectSpace,
            kGraySpace,
            kIndexSpace
        };

        enum Flags {
            kNoFlag             = 0x0000,
            kAlphaChannelFlag   = 0x0001,
            kAlphaBitFlag       = 0x0002,
            kBumpEnvMap         = 0x0004,
            kForce32Bit         = 0x0008,
            kDontThrowAwayImage = 0x0010,   // We can delete the image, but the pipeline can't
            kForceOneMipLevel   = 0x0020,
            kNoMaxSize          = 0x0040,
            kIntensityMap       = 0x0080,
            kHalfSize           = 0x0100,
            kUserOwnsBitmap     = 0x0200,
            kForceRewrite       = 0x0400,
            kForceNonCompressed = 0x0800,
            // For renderTargets:
            kIsTexture          = 0x1000,
            kIsOffscreen        = 0x2000,
            kMainScreen         = 0x0000,   // Exclusive, i.e. no renderTarget flags
            kIsProjected        = 0x4000,
            kIsOrtho            = 0x8000
        };

        //// Public Data /////

        enum        // Compression format
        {
            kUncompressed       = 0x0,
            kDirectXCompression = 0x1,
            kJPEGCompression    = 0x2
        };

        struct DirectXInfo
        {
            enum    // Compression type
            {
                kError          = 0x0,
                kDXT1           = 0x1,
                //kDXT2         = 0x2,
                //kDXT3         = 0x3,
                //kDXT4         = 0x4,
                kDXT5           = 0x5
            };

            uint8_t       fCompressionType;   
            uint8_t       fBlockSize;             // In bytes
        };

        struct UncompressedInfo
        {
            enum
            {
                kRGB8888 = 0x00,    /// 32-bit 8888 ARGB format
                kRGB4444 = 0x01,    /// 16-bit 4444 ARGB format
                kRGB1555 = 0x02,    /// 16-bit 555 RGB format w/ alpha bit
                kInten8    = 0x03,  /// 8-bit intensity channel (monochrome)
                kAInten88  = 0x04   /// 8-bit intensity channel w/ 8-bit alpha
            };

            uint8_t   fType;
        };

        //// Public Data /////

        uint8_t       fCompressionType;
        union 
        {
            DirectXInfo         fDirectXInfo;
            UncompressedInfo    fUncompressedInfo;
        };


        //// Public Members ////

        plBitmap();
        virtual ~plBitmap();

        CLASSNAME_REGISTER( plBitmap );
        GETINTERFACE_ANY( plBitmap, hsKeyedObject );

        // Get the total size in bytes
        virtual uint32_t  GetTotalSize( void ) const = 0;

        // Read and write
        virtual void    Read( hsStream *s, hsResMgr *mgr ) { hsKeyedObject::Read( s, mgr ); this->Read( s ); }
        virtual void    Write( hsStream *s, hsResMgr *mgr ) { hsKeyedObject::Write( s, mgr ); this->Write( s ); }

        uint16_t          GetFlags( void ) const { return fFlags; }
        void            SetFlags( uint16_t flags ) { fFlags = flags; }

        uint8_t           GetPixelSize( void ) const { return fPixelSize; }

        hsBool          IsCompressed( void ) const { return ( fCompressionType == kDirectXCompression ); }

        virtual void            MakeDirty();
        virtual hsGDeviceRef    *GetDeviceRef( void ) const { return fDeviceRef; }
        virtual void            SetDeviceRef( hsGDeviceRef *const devRef );

        static void     SetGlobalLevelChopCount( uint8_t count ) { fGlobalNumLevelsToChop = count; }
        static uint8_t    GetGlobalLevelChopCount() { return fGlobalNumLevelsToChop; }

        // Compares and sets the modified time for the source texture
        bool IsSameModifiedTime(uint32_t lowTime, uint32_t highTime);
        void SetModifiedTime(uint32_t lowTime, uint32_t highTime);

    protected:

        //// Protected Members ////

        uint8_t           fPixelSize; // 1, 2, 4, 8, 16, (24), 32, 64
        uint8_t           fSpace;     // no, direct, gray, index
        uint16_t          fFlags;     // alphachannel | alphabit

        mutable hsGDeviceRef    *fDeviceRef;

        static uint8_t            fGlobalNumLevelsToChop;

        // The modification time of the source texture.
        // Used to determine if we can reuse an already converted copy.
        uint32_t fLowModifiedTime;
        uint32_t fHighModifiedTime;

        virtual uint32_t  Read( hsStream *s );
        virtual uint32_t  Write( hsStream *s );
};

#endif // _plBitmap_h