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

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*==LICENSE==*/
///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//  plDynamicTextMap Class Header                                            //
//  I derived from plMipmap not because I inherit a lot of the functionality,//
//  but because this acts very very much like a mipmap with one mip level.   //
//  The only difference is that the actual data gets generated on the fly,   //
//  instead of converted at export time. However, to the outside world,      //
//  we're just a plain old mipmap, and I'd like to keep it that way.         //
//                                                                           //
//  Note that we are also of a fixed format--ARGB8888. Keeps things nice and //
//  simple that way.                                                         //
//                                                                           //
//  Cyan, Inc.                                                               //
//                                                                           //
//// Version History //////////////////////////////////////////////////////////
//                                                                           //
//  1.14.2002 mcn - Created.                                                 //
//  10.28.2002 mcn - Changing the arrangement a bit. Now we have a single    //
//                   writable "creation" surface that actually generates     //
//                   data, which then copies out on a flush to the actual    //
//                   mipmap data. This is slower because it requires two     //
//                   copies (second one when we prepare to write to a new    //
//                   surface, unless kDiscard is specified as a flush option)//
//                   but it lets us allocate only one OS surface, which saves//
//                   us on Win98/ME where we're very limited in terms of     //
//                   available OS surfaces.                                  //
//                   To facilitate this, we create a new abstract class to   //
//                   encapsulate the actual GDI functionality of Windows.    //
//                   This way, we have two options when creating DTMaps:     //
//                   allocate an OS writer per surface, which lets us avoid  //
//                   the copy problem mentioned above, or allocate one to    //
//                   share. This will also let us optimize by switching to   //
//                   non-shared writers once we write a non-OS-reliant       //
//                   writer/text renderer.                                   //
//                                                                           //
///////////////////////////////////////////////////////////////////////////////

#ifndef _plDynamicTextMap_h
#define _plDynamicTextMap_h

#include "plMipmap.h"
#include "hsColorRGBA.h"

struct hsMatrix44;

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

class plFont;
class plDynamicTextMap : public plMipmap
{
    protected:

        uint16_t      fVisWidth, fVisHeight;

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

    public:
        //// Public Flags ////

        enum Justify
        {
            kLeftJustify = 0,
            kCenter,
            kRightJustify
        };

        //// Public Data /////
        
        
        //// Public Members ////


        plDynamicTextMap();
        plDynamicTextMap( uint32_t width, uint32_t height, bool hasAlpha = false, uint32_t extraWidth = 0, uint32_t extraHeight = 0, bool premultipliedAlpha = false );
        virtual ~plDynamicTextMap();

        CLASSNAME_REGISTER( plDynamicTextMap );
        GETINTERFACE_ANY( plDynamicTextMap, plMipmap );


        void            Create( uint32_t width, uint32_t height, bool hasAlpha, uint32_t extraWidth = 0, uint32_t extraHeight = 0, bool premultipliedAlpha = false );
        void            SetNoCreate( uint32_t width, uint32_t height, bool hasAlpha );

        virtual void    Reset( void );

        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 ); }

        virtual uint8_t   GetNumLevels( void ) const { return 1; }

        virtual void        Colorize( void ) { ; }
        virtual plMipmap    *Clone( void );
        virtual void        CopyFrom( plMipmap *source );


        /// Operations to perform on the text block

        bool    IsValid() { return IIsValid(); }

        // allow the user of the DynaTextMap that they are done with the image... for now
        // ... the fImage will be re-created on the next operation that requires the image
        void    PurgeImage();

        void    ClearToColor( hsColorRGBA &color );

        enum FontFlags
        {
            kFontBold       = 0x01,
            kFontItalic     = 0x02,
            kFontShadowed   = 0x04
        };

        void    SetFont( const plString &face, uint16_t size, uint8_t fontFlags = 0, bool antiAliasRGB = true );
        void    SetLineSpacing( int16_t spacing );
        void    SetTextColor( hsColorRGBA &color, bool blockRGB = false );
        void    SetJustify( Justify j );

        void    DrawString( uint16_t x, uint16_t y, const char *text );
        void    DrawString( uint16_t x, uint16_t y, const wchar_t *text );
        void    DrawClippedString( int16_t x, int16_t y, const plString &text, uint16_t width, uint16_t height );
        void    DrawClippedString( int16_t x, int16_t y, const wchar_t *text, uint16_t width, uint16_t height );
        void    DrawClippedString( int16_t x, int16_t y, const plString &text, uint16_t clipX, uint16_t clipY, uint16_t width, uint16_t height );
        void    DrawClippedString( int16_t x, int16_t y, const wchar_t *text, uint16_t clipX, uint16_t clipY, uint16_t width, uint16_t height );
        void    DrawWrappedString( uint16_t x, uint16_t y, const plString &text, uint16_t width, uint16_t height, uint16_t *lastX = nil, uint16_t *lastY = nil );
        void    DrawWrappedString( uint16_t x, uint16_t y, const wchar_t *text, uint16_t width, uint16_t height, uint16_t *lastX = nil, uint16_t *lastY = nil );
        uint16_t  CalcStringWidth( const plString &text, uint16_t *height = nil );
        uint16_t  CalcStringWidth( const wchar_t *text, uint16_t *height = nil );
        void    CalcWrappedStringSize( const plString &text, uint16_t *width, uint16_t *height, uint32_t *firstClippedChar = nil, uint16_t *maxAscent = nil, uint16_t *lastX = nil, uint16_t *lastY = nil );
        void    CalcWrappedStringSize( const wchar_t *text, uint16_t *width, uint16_t *height, uint32_t *firstClippedChar = nil, uint16_t *maxAscent = nil, uint16_t *lastX = nil, uint16_t *lastY = nil );
        void    FillRect( uint16_t x, uint16_t y, uint16_t width, uint16_t height, hsColorRGBA &color );
        void    FrameRect( uint16_t x, uint16_t y, uint16_t width, uint16_t height, hsColorRGBA &color );
        void    SetFirstLineIndent( int16_t indent );

        enum DrawMethods
        {
            kImgNoAlpha,        // Just copy color data, force alpha to full if present
            kImgBlend,          // Blend color onto dest using src alpha, keep dest alpha
            kImgSprite          // Copy color data and alphas
        };
        void    DrawImage( uint16_t x, uint16_t y, plMipmap *image, DrawMethods method = kImgNoAlpha );
        void    DrawClippedImage( uint16_t x, uint16_t y, plMipmap *image, uint16_t srcClipX, uint16_t srcClipY, 
                                uint16_t srcClipWidth, uint16_t srcClipHeight, DrawMethods method = kImgNoAlpha );

        void    FlushToHost( void );

        bool    MsgReceive( plMessage *msg );

        uint16_t  GetVisibleWidth( void ) { return fVisWidth; }
        uint16_t  GetVisibleHeight( void ) { return fVisHeight; }

        // Since the dynamic text can actually create a texture bigger than you were expecting,
        // you want to be able to apply a layer texture transform that will compensate. This
        // function will give you that transform. Just feed it into plLayer->SetTransform().

        hsMatrix44  GetLayerTransform( void );

        void    SetInitBuffer( uint32_t *buffer );

        // Gets for font values
        Justify     GetFontJustify( void ) const { return fJustify; }
        plString    GetFontFace( void ) const { return fFontFace; }
        uint16_t    GetFontSize( void ) const { return fFontSize; }
        bool        GetFontAARGB( void ) const { return fFontAntiAliasRGB; }
        hsColorRGBA GetFontColor( void ) const { return fFontColor; }
        bool        GetFontBlockRGB( void ) const { return fFontBlockRGB; }
        int16_t       GetLineSpacing( void ) const { return fLineSpacing; }

        plFont      *GetCurrFont( void ) const { return fCurrFont; }

        virtual void    Swap( plDynamicTextMap *other );

    protected:

        //// Protected Members ////

        bool        IIsValid( void );
        void        IClearFromBuffer( uint32_t *clearBuffer );

        uint32_t      *IAllocateOSSurface( uint16_t width, uint16_t height );
        void        IDestroyOSSurface( void );

        void        IPropagateFlags();

        bool        fHasAlpha, fPremultipliedAlpha, fShadowed;

        Justify     fJustify;
        plString    fFontFace;
        uint16_t    fFontSize;
        uint8_t     fFontFlags;
        bool        fFontAntiAliasRGB;
        hsColorRGBA fFontColor;
        bool        fFontBlockRGB;
        int16_t       fLineSpacing;

        plFont      *fCurrFont;

        uint32_t      *fInitBuffer;
        
        bool        fHasCreateBeenCalled;
};


#endif // _plDynamicTextMap_h