CWE-ou-minkata/Sources/Plasma/PubUtilLib/plGImage/plFont.cpp

/*==LICENSE==*

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*==LICENSE==*/
///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//  plFont Class Header                                                      //
//  Seems like we've come full circle again. This is our generic Plasma      //
//  bitmap font class/format. Quick list of things it supports, or needs to: //
//      - Antialiasing, either in the font def or at rendertime              //
//      - Doublebyte character sets                                          //
//      - Platform independence, of course                                   //
//      - Render to reasonably arbitrary mipmap                              //
//      - Character-level kerning, both before and after, as well as         //
//        negative kerning (for ligatures)                                   //
//                                                                           //
//  Cyan, Inc.                                                               //
//                                                                           //
//// Version History //////////////////////////////////////////////////////////
//                                                                           //
//  3.4.2003 mcn - Created.                                                  //
//  4.3.2003 mcn - Updated. Casting a char to a uint16_t sign-extends it if    //
//                 the char is > 128, but casting it to an uint8_t first works.//
//                 Ugly as sin, but hey, so are you.                         //
//                                                                           //
///////////////////////////////////////////////////////////////////////////////

#include "HeadSpin.h"
#include "hsStlUtils.h"
#include "plFont.h"

#include "plMipmap.h"
#include "hsResMgr.h"


//// plCharacter Stuff ////////////////////////////////////////////////////////

plFont::plCharacter::plCharacter()
{
    fBitmapOff = 0;
    fHeight = 0;
    fBaseline = 0;
    fLeftKern = fRightKern = 0.f;
}

void    plFont::plCharacter::Read( hsStream *s )
{
    // Rocket science here...
    s->ReadLE( &fBitmapOff );
    s->ReadLE( &fHeight );
    s->ReadLE( &fBaseline );
    s->ReadLE( &fLeftKern );
    s->ReadLE( &fRightKern );
}

void    plFont::plCharacter::Write( hsStream *s )
{
    s->WriteLE( fBitmapOff );
    s->WriteLE( fHeight );
    s->WriteLE( fBaseline );
    s->WriteLE( fLeftKern );
    s->WriteLE( fRightKern );
}

//// Constructor/Read/Write/Destructor/etc ////////////////////////////////////

plFont::plFont()
{
    IClear( true );
}

plFont::~plFont()
{
    IClear();
}

void    plFont::IClear( bool onConstruct )
{
    if( !onConstruct )
        delete [] fBMapData;

    memset( fFace, 0, sizeof( fFace ) );
    fSize = 0;
    fFlags = 0;

    fWidth = fHeight = 0;
    fBPP = 0;
    fBMapData = nil;
    fFirstChar = 0;
    fMaxCharHeight = 0;
    fCharacters.Reset();

    fRenderInfo.fFlags = 0;
    fRenderInfo.fX = fRenderInfo.fY = fRenderInfo.fNumCols = 0;
    fRenderInfo.fMaxWidth = fRenderInfo.fMaxHeight = 0;
    fRenderInfo.fDestPtr = nil;
    fRenderInfo.fDestStride = 0;
    fRenderInfo.fColor = 0;
    fRenderInfo.fMipmap = nil;
    fRenderInfo.fRenderFunc = nil;
    fRenderInfo.fVolatileStringPtr = nil;
    fRenderInfo.fFirstLineIndent = 0;
    fRenderInfo.fLineSpacing = 0;
}

void    plFont::SetFace( const char *face )
{
    strncpy( fFace, face, sizeof( fFace ) );
}

void    plFont::SetSize( uint8_t size )
{
    fSize = size;
}

void    plFont::Read( hsStream *s, hsResMgr *mgr )
{
    hsKeyedObject::Read( s, mgr );
    ReadRaw( s );
}

void    plFont::Write( hsStream *s, hsResMgr *mgr )
{
    hsKeyedObject::Write( s, mgr );
    WriteRaw( s );
}

///////////////////////////////////////////////////////////////////////////////
//// Rendering ////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////

void    plFont::SetRenderColor( uint32_t color )
{
    fRenderInfo.fColor = color;
}

void    plFont::SetRenderClipRect( int16_t x, int16_t y, int16_t width, int16_t height )
{
    fRenderInfo.fClipRect.Set( x, y, width, height );
}

void    plFont::SetRenderClipping( int16_t x, int16_t y, int16_t width, int16_t height )
{
    SetRenderFlag( kRenderWrap, false );
    SetRenderFlag( kRenderClip, true );
    SetRenderClipRect( x, y, width, height );
}

void    plFont::SetRenderWrapping( int16_t x, int16_t y, int16_t width, int16_t height )
{
    SetRenderFlag( kRenderWrap, true );
    SetRenderFlag( kRenderClip, false );
    SetRenderClipRect( x, y, width, height );
}

void    plFont::ICalcFontAscent( void )
{
    uint32_t  i;


    // Hack for now, only calc the ascent for characters in the 127 character ASCII range
    for( i = 0, fFontAscent = 0, fFontDescent = 0, fMaxCharHeight = 0; i < fCharacters.GetCount(); i++ )
    {
        if( i + fFirstChar < 128 && fFontAscent < fCharacters[ i ].fBaseline )
            fFontAscent = fCharacters[ i ].fBaseline;

        int32_t descent = fCharacters[ i ].fHeight - fCharacters[ i ].fBaseline;
        if( fFontDescent < descent )
            fFontDescent = descent;

        if( fMaxCharHeight < fCharacters[ i ].fHeight )
            fMaxCharHeight = fCharacters[ i ].fHeight;
    }
}

//// IIsWordBreaker //////////////////////////////////////////////////////////
//  Returns whether the given character is one that can break a line

static inline bool  IIsWordBreaker( const char c )
{
    return ( strchr( " \t,.;\n", c ) != nil ) ? true : false;
}

//// IIsDrawableWordBreak /////////////////////////////////////////////////////
// Returns whether the given character is a line breaker that has to be drawn
// (non whitespace)

static inline bool  IIsDrawableWordBreak( const char c )
{
    return ( strchr( ",.;", c ) != nil ) ? true : false;
}

//// RenderString /////////////////////////////////////////////////////////////
//  The base render function. Additional options are specified externally,
//  so that their effects can be cached for optimization

void    plFont::RenderString( plMipmap *mip, uint16_t x, uint16_t y, const char *string, uint16_t *lastX, uint16_t *lastY )
{
    // convert the char string to a wchar_t string
    wchar_t *wideString = hsStringToWString(string);
    RenderString(mip,x,y,wideString,lastX,lastY);
    delete [] wideString;
}


void    plFont::RenderString( plMipmap *mip, uint16_t x, uint16_t y, const wchar_t *string, uint16_t *lastX, uint16_t *lastY )
{
    if( mip->IsCompressed() )
    {
        hsAssert( false, "Unable to render string to compressed mipmap" );
        return;
    }

    IRenderString( mip, x, y, string, false );
    if( lastX != nil )
        *lastX = fRenderInfo.fLastX;
    if( lastY != nil )
        *lastY = fRenderInfo.fLastY;
}

void    plFont::IRenderString( plMipmap *mip, uint16_t x, uint16_t y, const wchar_t *string, hsBool justCalc )
{
    fRenderInfo.fMipmap = mip;
    fRenderInfo.fX = x;
    fRenderInfo.fY = y;
    fRenderInfo.fNumCols = (int16_t)(( fBPP <= 8 ) ? ( ( fWidth * fBPP ) >> 3 ) : 0);
    fRenderInfo.fFloatWidth = (float)fWidth;
    fRenderInfo.fFarthestX = x;
    fRenderInfo.fMaxAscent = 0;
    fRenderInfo.fVolatileStringPtr = string;

    switch( fRenderInfo.fFlags & kRenderJustYMask )
    {
        case kRenderJustYTop: 
            fRenderInfo.fY += (int16_t)fFontAscent; 
            break;
        case kRenderJustYBottom:
            if( fRenderInfo.fFlags & ( kRenderClip | kRenderWrap ) )
                fRenderInfo.fY = (int16_t)(fRenderInfo.fClipRect.GetBottom() - 1 - fMaxCharHeight + fFontAscent);
            else
                fRenderInfo.fY = (int16_t)(mip->GetHeight() - 1 - fMaxCharHeight + fFontAscent);
            break;
        case kRenderJustYCenter:
            fRenderInfo.fY = (int16_t)(( fRenderInfo.fFlags & ( kRenderClip | kRenderWrap ) ) ? fRenderInfo.fClipRect.GetBottom() - 1 : mip->GetHeight() - 1);
            fRenderInfo.fY = (int16_t)(( fRenderInfo.fY - fMaxCharHeight ) >> 1);
            fRenderInfo.fY += (int16_t)fFontAscent;
            break;
        default:    // Just the baseline
            ;
    }

    if( justCalc )
    {
        plCharacter &ch = fCharacters[ (uint16_t)string[ 0 ] - fFirstChar ];
        fRenderInfo.fX = fRenderInfo.fFarthestX = x - (int16_t)ch.fLeftKern;
        if( fRenderInfo.fX < 0 )
            fRenderInfo.fX = 0;
    }
    else
    {
        switch( fRenderInfo.fFlags & kRenderJustXMask )
        {
            case kRenderJustXLeft:
                // Default
                break;
            case kRenderJustXForceLeft:
                {
//                  plCharacter &ch = fCharacters[ (uint16_t)(uint8_t)string[ 0 ] - fFirstChar ];
//                  int32_t newX = x - (int16_t)ch.fLeftKern;
//                  if( newX < 0 )
//                      newX = 0;
//                  fRenderInfo.fX = fRenderInfo.fFarthestX = newX;
                }
                break;
            case kRenderJustXCenter:
                {
                    uint16_t right = (uint16_t)(( fRenderInfo.fFlags & ( kRenderClip | kRenderWrap ) ) ? fRenderInfo.fClipRect.GetRight() : mip->GetWidth());
//                  uint16_t width = CalcStringWidth( string );
                    fRenderInfo.fX = fRenderInfo.fFarthestX = ( ( x + right ) >> 1 );// - ( width >> 1 );
                }
                break;
            case kRenderJustXRight:
                {
                    uint16_t width = 0, right = (uint16_t)(( fRenderInfo.fFlags & ( kRenderClip | kRenderWrap ) ) ? fRenderInfo.fClipRect.GetRight() : mip->GetWidth());
/*                  if( fRenderInfo.fFlags & kRenderClip )
                    {
                        fRenderInfo.fFlags &= ~kRenderClip;
                        width = CalcStringWidth( string );
                        fRenderInfo.fFlags |= kRenderClip;
                    }
                    else
*/                      width = 0;//CalcStringWidth( string );
                    fRenderInfo.fX = fRenderInfo.fFarthestX = right - width;
                }
                break;
        }
    }

    // Choose an optimal rendering function
    fRenderInfo.fRenderFunc = nil;
    if( justCalc )
        fRenderInfo.fRenderFunc = &plFont::IRenderCharNull;
    else if( mip->GetPixelSize() == 32 )
    {
        if( fBPP == 1 )
            fRenderInfo.fRenderFunc = ( fRenderInfo.fFlags & kRenderScaleAA ) ? &plFont::IRenderChar1To32AA : &plFont::IRenderChar1To32;
        else if( fBPP == 8 )
        {
            if( fRenderInfo.fFlags & kRenderIntoAlpha )
            {
                if( ( fRenderInfo.fColor & 0xff000000 ) != 0xff000000 )
                    fRenderInfo.fRenderFunc = &plFont::IRenderChar8To32Alpha;
                else
                    fRenderInfo.fRenderFunc = &plFont::IRenderChar8To32FullAlpha;
            }
            else
                fRenderInfo.fRenderFunc = &plFont::IRenderChar8To32;
        }
    }

    if( fRenderInfo.fRenderFunc == nil )
    {
        hsAssert( false, "Invalid combination of source and destination formats in RenderString()" );
        return;
    }

    // Init our other render values
    if( !justCalc )
    {
        fRenderInfo.fDestStride = mip->GetRowBytes();
        fRenderInfo.fDestBPP = mip->GetPixelSize() >> 3;
        fRenderInfo.fDestPtr = (uint8_t *)mip->GetImage();
        fRenderInfo.fDestPtr += fRenderInfo.fY * fRenderInfo.fDestStride;
        fRenderInfo.fDestPtr += fRenderInfo.fX * fRenderInfo.fDestBPP;
    }
    if( fRenderInfo.fFlags & ( kRenderWrap | kRenderClip ) )
    {
        fRenderInfo.fMaxHeight = (int16_t)( fRenderInfo.fClipRect.GetBottom() - fRenderInfo.fY );
        fRenderInfo.fMaxWidth = (int16_t)( fRenderInfo.fClipRect.GetRight() - x );
    }
    else if( justCalc )
    {
        // Just calculating, no wrapping, so the max is as far as we can go
        // Note: 32767 isn't quite right, since we'll be adding the left kern in before we
        // calc the first character, so adjust so we make sure we don't underflow
        plCharacter &ch = fCharacters[ (uint16_t)(uint8_t)string[ 0 ] - fFirstChar ];

        fRenderInfo.fMaxHeight = (int16_t)fMaxCharHeight;
        fRenderInfo.fMaxWidth = (int16_t)32767 + (int16_t)ch.fLeftKern;
    }
    else
    {
        fRenderInfo.fMaxHeight = (int16_t)( mip->GetHeight() - fRenderInfo.fY );
        fRenderInfo.fMaxWidth = (int16_t)( mip->GetWidth() - x );
    }

    fRenderInfo.fMaxDescent = 0;

    if( fRenderInfo.fFlags & kRenderWrap )
    {
        // Hell, gotta uint16_t wrap the text
        // To avoid backtracking, we step forward in the string one uint16_t at a time until we hit a break,
        // then render what we have and continue
        int32_t lastWord = 0, i;
        bool isFirstLine = true;
        x = 0;
        int16_t firstMaxAscent = 0;
        uint32_t lineHt, lineDelta;
        if( fRenderInfo.fFlags & kRenderScaleAA )
            lineHt = fMaxCharHeight >> 1;
        else
            lineHt = fMaxCharHeight;
        
        // adjust the line height for spacing
        lineHt += fRenderInfo.fLineSpacing;

        lineDelta = lineHt * fRenderInfo.fDestStride;

        while( *string != 0 && fRenderInfo.fMaxHeight >= fFontDescent )
        {
            uint8_t *destStartPtr = fRenderInfo.fDestPtr;
            uint32_t destStartX = fRenderInfo.fX;
            int16_t destMaxWidth = fRenderInfo.fMaxWidth, thisIndent = 0;

            if( isFirstLine )
            {
                // First line, apply indent if applicable
                fRenderInfo.fX += fRenderInfo.fFirstLineIndent;
                fRenderInfo.fMaxWidth -= fRenderInfo.fFirstLineIndent;
                fRenderInfo.fDestPtr += fRenderInfo.fFirstLineIndent * fRenderInfo.fDestBPP;
                thisIndent = fRenderInfo.fFirstLineIndent;
                isFirstLine = false;
            }

            std::string ellipsisTracker = ""; // keeps track of ellipsis, since there are three uint16_t break chars that can't be split
            bool possibleEllipsis = false;
            int preEllipsisLastWord = 0; // where the uint16_t break was before we started tracking an ellipsis

            // Iterate through the string, looking for the next line break
            for( lastWord = 0, i = 0; string[ i ] != 0; i++ )
            {
                // If we're a carriage return, we go ahead and break anyway
                if( string[ i ] == L'\n' )
                {
                    lastWord = i;
                    break;
                }
                
                // handle invalid chars discretely
                plCharacter* charToDraw = NULL;
                if (fCharacters.Count() <= ((uint16_t)string[i] - fFirstChar))
                    charToDraw = &(fCharacters[(uint16_t)L' ' - fFirstChar]);
                else
                    charToDraw = &(fCharacters[(uint16_t)string[i] - fFirstChar]);

                int16_t leftKern = (int16_t)charToDraw->fLeftKern;
                if( fRenderInfo.fFlags & kRenderScaleAA )
                    x += leftKern / 2;
                else
                    x += leftKern;

                // Update our position and see if we're over
                // Note that our wrapping is slightly off, in that it doesn't take into account
                // the left kerning of characters. Hopefully that won't matter much...
                uint16_t charWidth = (uint16_t)(fWidth + (int16_t)charToDraw->fRightKern);
                if( fRenderInfo.fFlags & kRenderScaleAA )
                    charWidth >>= 1;

                uint16_t nonAdjustedX = (uint16_t)(x + fWidth); // just in case the actual bitmap is too big to fit on page and we think the character can (because of right kern)
                x += charWidth;

                if(( x >= fRenderInfo.fMaxWidth ) || (nonAdjustedX >= fRenderInfo.fMaxWidth))
                {
                    // we're over, but lastWord may not be correct (especially if we're in the middle of an ellipsis)
                    if (possibleEllipsis)
                    {
                        // ellipsisTracker will not be empty since possibleEllipsis is true (so there will be at least one period)
                        if (ellipsisTracker == ".") // only one period so far
                        {
                            if ((string[i] == '.') && (string[i+1] == '.')) // we have an ellipsis, so reset the lastWord back before we found it
                                lastWord = preEllipsisLastWord;
                            // otherwise, we don't have an ellipsis, so lastWord is correct (but the grammer might not be ;-)
                        }
                        else if (ellipsisTracker == "..") // only two periods so far
                        {
                            if (string[i] == '.') // we have an ellipsis, so reset the lastWord back before we found it
                                lastWord = preEllipsisLastWord;
                            // otherwise, we don't have an ellipsis, so lastWord is correct (but the grammer might not be ;-)
                        }
                        // if neither of the above are true, then the full ellipsis was encountered and the lastWord is correct
                        ellipsisTracker = "";
                        possibleEllipsis = false;
                    }
                    // Over, so break
                    break;
                }

                // Are we a uint16_t breaker?
                if( IIsWordBreaker( (char)(string[ i ]) ) )
                {
                    if (string[i] == '.') // we might have an ellipsis here
                    {
                        if (ellipsisTracker == "...") // we already have a full ellipsis, so break between them
                        {
                            preEllipsisLastWord = i;
                            ellipsisTracker = "";
                        }
                        else if (ellipsisTracker == "") // no ellipsis yet, so save the last word
                            preEllipsisLastWord = lastWord;
                        ellipsisTracker += '.';
                        possibleEllipsis = true;
                    }
                    else
                    {
                        ellipsisTracker = ""; // no chance of an ellipsis, so kill it
                        possibleEllipsis = false;
                    }
                    // Yes, and we didn't go over, so store as the last successfully fit uint16_t and move on
                    lastWord = i;
                }           
            }

            if( string[ i ] == 0 )
                lastWord = i;       // Final catch for end-of-string
            else if( lastWord == 0 && string[ i ] != L'\n' && thisIndent == 0 )
                lastWord = i;       // Catch for a single uint16_t that didn't fit (just go up as many chars as we can)
                                    // (but NOT if we have a first line indent, mind you :)

            // Got to the end of a line (somewhere), so render up to lastWord, then advance from that point
            // to the first non-word-breaker and continue onward
            if( lastWord > 0 )
            {
                bool drawableWordBreak = IIsDrawableWordBreak((char)(string[lastWord]));
                if (drawableWordBreak)
                    lastWord++; // make sure we draw it
                if( ( fRenderInfo.fFlags & kRenderJustXMask ) == kRenderJustXRight )
                {
                    uint16_t baseX = fRenderInfo.fX, baseMaxW = fRenderInfo.fMaxWidth;
                    uint8_t *baseDestPtr = fRenderInfo.fDestPtr;

                    fRenderInfo.fX = 0;
                    CharRenderFunc oldFunc = fRenderInfo.fRenderFunc;
                    fRenderInfo.fRenderFunc = &plFont::IRenderCharNull;

                    IRenderLoop( string, lastWord );

                    fRenderInfo.fRenderFunc = oldFunc;
                    fRenderInfo.fX = baseX - fRenderInfo.fX;
                    fRenderInfo.fMaxWidth = baseMaxW;
                    fRenderInfo.fDestPtr = baseDestPtr + ( fRenderInfo.fX - baseX ) * fRenderInfo.fDestBPP;

                    IRenderLoop( string, lastWord );

                    fRenderInfo.fLastX = fRenderInfo.fX;
                    fRenderInfo.fLastY = fRenderInfo.fY;
                    fRenderInfo.fX = baseX;
                }
                else if( ( fRenderInfo.fFlags & kRenderJustXMask ) == kRenderJustXCenter )
                {
                    uint16_t baseX = fRenderInfo.fX, baseMaxW = fRenderInfo.fMaxWidth;
                    uint8_t *baseDestPtr = fRenderInfo.fDestPtr;

                    fRenderInfo.fX = 0;
                    CharRenderFunc oldFunc = fRenderInfo.fRenderFunc;
                    fRenderInfo.fRenderFunc = &plFont::IRenderCharNull;

                    IRenderLoop( string, lastWord );

                    fRenderInfo.fRenderFunc = oldFunc;
                    fRenderInfo.fX = baseX - ( fRenderInfo.fX >> 1 );
                    fRenderInfo.fMaxWidth = baseMaxW;
                    fRenderInfo.fDestPtr = baseDestPtr + ( fRenderInfo.fX - baseX ) * fRenderInfo.fDestBPP;

                    IRenderLoop( string, lastWord );

                    fRenderInfo.fLastX = fRenderInfo.fX;
                    fRenderInfo.fLastY = fRenderInfo.fY;
                    fRenderInfo.fX = baseX;
                }
                else if( ( fRenderInfo.fFlags & kRenderJustXMask ) == kRenderJustXForceLeft )
                {
                    int16_t baseX = fRenderInfo.fX;

                    plCharacter &ch = fCharacters[ (uint16_t)string[ 0 ] - fFirstChar ];

                    fRenderInfo.fX -= (int16_t)ch.fLeftKern;
                    fRenderInfo.fDestPtr -= (int16_t)ch.fLeftKern * fRenderInfo.fDestBPP;

                    IRenderLoop( string, lastWord );
                
                    fRenderInfo.fLastX = fRenderInfo.fX;
                    fRenderInfo.fLastY = fRenderInfo.fY;
                    fRenderInfo.fX = baseX;
                }
                else
                {
                    IRenderLoop( string, lastWord );
                    fRenderInfo.fLastX = fRenderInfo.fX;
                    fRenderInfo.fLastY = fRenderInfo.fY;
                }
                if (drawableWordBreak)
                    lastWord--; // reset it
            }


            // Store farthest X for later reference
            if( lastWord > 0 && fRenderInfo.fX > fRenderInfo.fFarthestX )
                fRenderInfo.fFarthestX = fRenderInfo.fX;

            if( firstMaxAscent == 0 )
                firstMaxAscent = fRenderInfo.fMaxAscent;

            x = 0;
            fRenderInfo.fX = (int16_t)destStartX;
            fRenderInfo.fDestPtr = destStartPtr;
            fRenderInfo.fMaxWidth = destMaxWidth;
            fRenderInfo.fMaxAscent = 0;

            // Look for the next non-word-breaker. Note that if we have any carriage returns hidden in here, 
            // we'll want to be advancing down even further
            // Advance down
            if( string[ i ] != 0 )
            {
                fRenderInfo.fY += (int16_t)lineHt;
                fRenderInfo.fMaxHeight -= (int16_t)lineHt;
                fRenderInfo.fDestPtr += lineDelta;
                fRenderInfo.fLastX = fRenderInfo.fX;
                fRenderInfo.fLastY = fRenderInfo.fY;
            }
            for( i = lastWord; string[ i ] != 0 && IIsWordBreaker( (char)(string[ i ]) ) && string[ i ] != L'\n'; i++ )
            {
            }
            // Process any trailing carriage returns as a separate loop b/c we don't want to throw away white space
            // after returns
            for( ; string[ i ] == L'\n'; i++ )
            {
                // Don't process if i==lastWord, since we already did that one
                if( i > lastWord && string[ i ] == L'\n' )
                {
                    // Advance down
                    fRenderInfo.fY += (int16_t)lineHt;
                    fRenderInfo.fMaxHeight -= (int16_t)lineHt;
                    fRenderInfo.fDestPtr += lineDelta;
                    fRenderInfo.fLastY = fRenderInfo.fY;
                }
            }

            // Keep going from here!
            string += i;
        }

        fRenderInfo.fMaxAscent = firstMaxAscent;    
        // Final y offset from the last line
        fRenderInfo.fY += (int16_t)fFontDescent;

        fRenderInfo.fVolatileStringPtr = string; 
    }
    else
    {
        if( fRenderInfo.fFlags & kRenderClip )
        {
            // Advance left past any clipping area
            CharRenderFunc oldFunc = fRenderInfo.fRenderFunc;
            fRenderInfo.fRenderFunc = &plFont::IRenderCharNull;
            while( fRenderInfo.fX < fRenderInfo.fClipRect.fX && *string != 0 )
            {
                IRenderLoop( string, 1 );
                string++;
            }
            fRenderInfo.fRenderFunc = oldFunc;
        }

        // Adjust for left kern
        if( ( fRenderInfo.fFlags & kRenderJustXMask ) == kRenderJustXForceLeft )
        {
            // See note at top of file
            plCharacter &ch = fCharacters[ (uint16_t)string[ 0 ] - fFirstChar ];
            int32_t newX = x - (int16_t)ch.fLeftKern;
            if( newX < 0 )
                newX = 0;
            fRenderInfo.fX = fRenderInfo.fFarthestX = (int16_t)newX;
        }

        fRenderInfo.fVolatileStringPtr = string;    // Just so we can keep track of when we clip
        IRenderLoop( string, -1 );
        fRenderInfo.fFarthestX = fRenderInfo.fX;
    }
}

void    plFont::IRenderLoop( const wchar_t *string, int32_t maxCount )
{
    // Render the string straight across, one char at a time
    while( *string != 0 && maxCount != 0 )  // Note: if maxCount starts out -1, then it'll just keep 
    {                                       // decrementing...well ok, not for forever, but pretty close
        uint16_t c = (uint16_t)*string;
        if( c < fFirstChar )
            ;       // Invalid char
        else
        {
            c -= fFirstChar;
            if( c >= fCharacters.GetCount() )
                ;   // Invalid char
            else
            {
                // First pass at supporting left kerning values, but only at the pixel level
                int16_t leftKern = (int16_t)fCharacters[ c ].fLeftKern;
                if( leftKern != 0 )
                {
                    if( fRenderInfo.fFlags & kRenderScaleAA )
                        leftKern /= 2;

                    fRenderInfo.fX += leftKern;
                    fRenderInfo.fMaxWidth -= leftKern;
                    fRenderInfo.fDestPtr += leftKern * fRenderInfo.fDestBPP;
                }

                uint16_t thisWidth = (uint16_t)(fWidth + fCharacters[ c ].fRightKern);
                if( fRenderInfo.fFlags & kRenderScaleAA )
                    thisWidth >>= 1;

                if( thisWidth >= fRenderInfo.fMaxWidth )
                    break;

                (this->*(fRenderInfo.fRenderFunc))( fCharacters[ c ] );

                fRenderInfo.fX += thisWidth;
                fRenderInfo.fMaxWidth -= thisWidth;
                fRenderInfo.fDestPtr += thisWidth * fRenderInfo.fDestBPP;


                int16_t baseline = (int16_t)(fCharacters[ c ].fBaseline);
                if( fRenderInfo.fFlags & kRenderScaleAA )
                    baseline >>= 1;

                if( baseline > fRenderInfo.fMaxAscent )
                    fRenderInfo.fMaxAscent = baseline;

                int16_t thisHt = (int16_t)(fCharacters[ c ].fHeight - baseline);
                if( fRenderInfo.fMaxDescent < thisHt )
                    fRenderInfo.fMaxDescent = thisHt;
            }
        }

        string++;
        fRenderInfo.fVolatileStringPtr++;
        maxCount--;
    }
}

//// The Rendering Functions //////////////////////////////////////////////////

void    plFont::IRenderChar1To32( const plFont::plCharacter &c )
{
    uint8_t   bitMask, *src = fBMapData + c.fBitmapOff;
    uint32_t  *destPtr, *destBasePtr = (uint32_t *)( fRenderInfo.fDestPtr - c.fBaseline * fRenderInfo.fDestStride );
    uint16_t  x, y;

    
    if( (int32_t)c.fHeight - (int32_t)c.fBaseline >= fRenderInfo.fMaxHeight || c.fBaseline > fRenderInfo.fY )
        return;

    for( y = 0; y < c.fHeight; y++ )
    {
        destPtr = destBasePtr;
        if( fRenderInfo.fFlags & kRenderItalic )
        {
            // Faux italic
            destPtr += ( c.fHeight - y ) >> 1;
        }

        for( x = 0; x < fRenderInfo.fNumCols; x++ )
        {
            for( bitMask = 0x80; bitMask != 0; bitMask >>= 1 )
            {   
                if( *src & bitMask )
                    *destPtr = fRenderInfo.fColor;
                destPtr++;
            }
            src++;
        }
        destBasePtr = (uint32_t *)( (uint8_t *)destBasePtr + fRenderInfo.fDestStride );
    }
}

void    plFont::IRenderChar1To32AA( const plFont::plCharacter &c )
{
    uint8_t   bitMask, *src = fBMapData + c.fBitmapOff;
    uint32_t  *destPtr, *destBasePtr = (uint32_t *)( fRenderInfo.fDestPtr - ( c.fBaseline >> 1 ) * fRenderInfo.fDestStride );
    uint16_t  x, y;

    
    if( ( ( (int32_t)c.fHeight - (int32_t)c.fBaseline ) >> 1 ) >= fRenderInfo.fMaxHeight || ( c.fBaseline >> 1 ) > fRenderInfo.fY )
        return;

    for( y = 0; y < c.fHeight; y += 2 )
    {
        destPtr = destBasePtr;
        if( fRenderInfo.fFlags & kRenderItalic )
        {
            // Faux italic
            destPtr += ( c.fHeight - y ) >> 2;
        }

        for( x = 0; x < fRenderInfo.fNumCols; x++ )
        {
            for( bitMask = 0x80; bitMask != 0; bitMask >>= 2 )
            {   
                // Grab 4 bits and do 4-to-1 AA
                uint8_t value = ( *src & bitMask ) ? 1 : 0;
                value += ( *src & ( bitMask >> 1 ) ) ? 1 : 0;
                value += ( src[ fRenderInfo.fNumCols ] & bitMask ) ? 1 : 0;
                value += ( src[ fRenderInfo.fNumCols ] & ( bitMask >> 1 ) ) ? 1 : 0;

                switch( value )
                {
                    case 1:
                    {
                        uint32_t src = ( fRenderInfo.fColor >> 2 ) & 0x3f3f3f3f;
                        uint32_t dst = ( (*destPtr) >> 2 ) & 0x3f3f3f3f;
                        *destPtr = src + dst + dst + dst;                   
                        break;
                    }
                    case 2:
                    {
                        uint32_t src = ( fRenderInfo.fColor >> 1 ) & 0x7f7f7f7f;
                        uint32_t dst = ( (*destPtr) >> 1 ) & 0x7f7f7f7f;
                        *destPtr = src + dst;
                        break;
                    }
                    case 3:
                    {
                        uint32_t src = ( fRenderInfo.fColor >> 2 ) & 0x3f3f3f3f;
                        uint32_t dst = ( (*destPtr) >> 2 ) & 0x3f3f3f3f;
                        *destPtr = src + src + src + dst;
                        break;
                    }
                    case 4:
                        *destPtr = fRenderInfo.fColor;
                }

                destPtr++;
            }
            src++;
        }
        destBasePtr = (uint32_t *)( (uint8_t *)destBasePtr + fRenderInfo.fDestStride );
        src += fRenderInfo.fNumCols;
    }
}

void    plFont::IRenderChar8To32( const plFont::plCharacter &c )
{
    uint8_t   *src = fBMapData + c.fBitmapOff;
    uint32_t  *destPtr, *destBasePtr = (uint32_t *)( fRenderInfo.fDestPtr - c.fBaseline * fRenderInfo.fDestStride );
    uint16_t  x, y;
    uint32_t  srcAlpha, oneMinusAlpha, r, g, b, dR, dG, dB, destAlpha, thisWidth;
    uint8_t   srcR, srcG, srcB;


    // Unfortunately for some fonts, their right kern value actually is
    // farther left than the right edge of the bitmap (think of overlapping
    // script fonts). Ideally, we should store the actual width of each char's
    // bitmap and use that here. However, it really shouldn't make too big of a
    // difference, especially since the dest pixels that we end up overlapping
    // should already be in the cache. If it does, time to upgrade the font
    // format (again)
    thisWidth = fWidth;// + (int32_t)c.fRightKern;

    if( (int32_t)c.fHeight - (int32_t)c.fBaseline >= fRenderInfo.fMaxHeight || thisWidth >= fRenderInfo.fMaxWidth || c.fBaseline > fRenderInfo.fY )
        return;

    srcR = (uint8_t)(( fRenderInfo.fColor >> 16 ) & 0x000000ff);
    srcG = (uint8_t)(( fRenderInfo.fColor >> 8  ) & 0x000000ff);
    srcB = (uint8_t)(( fRenderInfo.fColor       ) & 0x000000ff);

    for( y = 0; y < c.fHeight; y++ )
    {
        destPtr = destBasePtr;
        for( x = 0; x < thisWidth; x++ )
        {
            if( src[ x ] == 255 )
                destPtr[ x ] = fRenderInfo.fColor;
            else if( src[ x ] == 0 )
                ;   // Empty
            else
            {
                srcAlpha = ( src[ x ] * ( fRenderInfo.fColor >> 24 ) ) / 255;
                oneMinusAlpha = 255 - srcAlpha;

                destAlpha = destPtr[ x ] & 0xff000000;

                dR = ( destPtr[ x ] >> 16 ) & 0x000000ff;
                dG = ( destPtr[ x ] >> 8  ) & 0x000000ff;
                dB = ( destPtr[ x ]       ) & 0x000000ff;
                r = ( srcR * srcAlpha ) >> 8;
                g = ( srcG * srcAlpha ) >> 8;
                b = ( srcB * srcAlpha ) >> 8;
                dR = ( dR * oneMinusAlpha ) >> 8;
                dG = ( dG * oneMinusAlpha ) >> 8;
                dB = ( dB * oneMinusAlpha ) >> 8;

                destPtr[ x ] = ( ( r + dR ) << 16 ) | ( ( g + dG ) << 8 ) | ( b + dB ) | destAlpha;
            }
        }
        destBasePtr = (uint32_t *)( (uint8_t *)destBasePtr + fRenderInfo.fDestStride );
        src += fWidth;
    }
}

void    plFont::IRenderChar8To32FullAlpha( const plFont::plCharacter &c )
{
    uint8_t   *src = fBMapData + c.fBitmapOff;
    uint32_t  *destPtr, *destBasePtr = (uint32_t *)( fRenderInfo.fDestPtr - c.fBaseline * fRenderInfo.fDestStride );
    uint16_t  x, y;
    uint32_t  destColorOnly, thisWidth;


    // Unfortunately for some fonts, their right kern value actually is
    // farther left than the right edge of the bitmap (think of overlapping
    // script fonts). Ideally, we should store the actual width of each char's
    // bitmap and use that here. However, it really shouldn't make too big of a
    // difference, especially since the dest pixels that we end up overlapping
    // should already be in the cache. If it does, time to upgrade the font
    // format (again)
    thisWidth = fWidth;// + (int32_t)c.fRightKern;

    if( (int32_t)c.fHeight - (int32_t)c.fBaseline  >= fRenderInfo.fMaxHeight || thisWidth >= fRenderInfo.fMaxWidth || c.fBaseline > fRenderInfo.fY )
        return;

    destColorOnly = fRenderInfo.fColor & 0x00ffffff;

    for( y = 0; y < c.fHeight; y++ )
    {
        destPtr = destBasePtr;
        for( x = 0; x < thisWidth; x++ )
        {
            if( src[ x ] != 0 )
                destPtr[ x ] = ( src[ x ] << 24 ) | destColorOnly;
        }
        destBasePtr = (uint32_t *)( (uint8_t *)destBasePtr + fRenderInfo.fDestStride );
        src += fWidth;
    }
}

void    plFont::IRenderChar8To32Alpha( const plFont::plCharacter &c )
{
    uint8_t   val, *src = fBMapData + c.fBitmapOff;
    uint32_t  *destPtr, *destBasePtr = (uint32_t *)( fRenderInfo.fDestPtr - c.fBaseline * fRenderInfo.fDestStride );
    uint16_t  x, y;
    uint32_t  destColorOnly, alphaMult, fullAlpha, thisWidth;


    // Unfortunately for some fonts, their right kern value actually is
    // farther left than the right edge of the bitmap (think of overlapping
    // script fonts). Ideally, we should store the actual width of each char's
    // bitmap and use that here. However, it really shouldn't make too big of a
    // difference, especially since the dest pixels that we end up overlapping
    // should already be in the cache. If it does, time to upgrade the font
    // format (again)
    thisWidth = fWidth;// + (int32_t)c.fRightKern;

    if( (int32_t)c.fHeight - (int32_t)c.fBaseline  >= fRenderInfo.fMaxHeight || thisWidth >= fRenderInfo.fMaxWidth || c.fBaseline > fRenderInfo.fY )
        return;

    destColorOnly = fRenderInfo.fColor & 0x00ffffff;
    // alphaMult should come out to be a value to satisfy (fontAlpha * alphaMult >> 8) as the right alpha,
    // but then we want it so (fontAlpha * alphaMult) will be in the upper 8 bits
    fullAlpha = fRenderInfo.fColor & 0xff000000;
    alphaMult = fullAlpha / 255;

    for( y = 0; y < c.fHeight; y++ )
    {
        destPtr = destBasePtr;
        for( x = 0; x < thisWidth; x++ )
        {
            val = src[ x ];
            if( val == 0xff )
                destPtr[ x ] = fullAlpha | destColorOnly;
            else if( val != 0 )
            {
                destPtr[ x ] = ( ( alphaMult * val ) & 0xff000000 ) | destColorOnly;
            }
        }
        destBasePtr = (uint32_t *)( (uint8_t *)destBasePtr + fRenderInfo.fDestStride );
        src += fWidth;
    }
}


void    plFont::IRenderCharNull( const plCharacter &c )
{
}

//// CalcString Variations ////////////////////////////////////////////////////

uint16_t  plFont::CalcStringWidth( const char *string )
{
    uint16_t w, h, a, lX, lY;
    uint32_t s;
    CalcStringExtents( string, w, h, a, s, lX, lY );
    return w;
}

uint16_t  plFont::CalcStringWidth( const wchar_t *string )
{
    uint16_t w, h, a, lX, lY;
    uint32_t s;
    CalcStringExtents( string, w, h, a, s, lX, lY );
    return w;
}

void    plFont::CalcStringExtents( const char *string, uint16_t &width, uint16_t &height, uint16_t &ascent, uint32_t &firstClippedChar, uint16_t &lastX, uint16_t &lastY )
{
    // convert the char string to a wchar_t string
    wchar_t *wideString = hsStringToWString(string);
    CalcStringExtents(wideString,width,height,ascent,firstClippedChar,lastX,lastY);
    delete [] wideString;
}

void    plFont::CalcStringExtents( const wchar_t *string, uint16_t &width, uint16_t &height, uint16_t &ascent, uint32_t &firstClippedChar, uint16_t &lastX, uint16_t &lastY )
{
    IRenderString( nil, 0, 0, string, true );
    width = fRenderInfo.fFarthestX;
    height = (uint16_t)(fRenderInfo.fY + fFontDescent);//fRenderInfo.fMaxDescent;
    ascent = fRenderInfo.fMaxAscent;
    lastX = fRenderInfo.fLastX;
    lastY = fRenderInfo.fLastY;

    // firstClippedChar is an index into the given string that points to the start of the part of the string
    // that got clipped (i.e. not rendered).
    firstClippedChar = (uintptr_t)fRenderInfo.fVolatileStringPtr - (uintptr_t)string;
    firstClippedChar /= 2; // divide by 2 because a wchar_t is two bytes wide, instead of one (like a char)
}

//// IGetFreeCharData /////////////////////////////////////////////////////////
//  Used for constructing fonts one character at a time; finds a pointer to
//  the first free space in our allocated font bitmap, based on the heights
//  and offsets of all the current characters

uint8_t   *plFont::IGetFreeCharData( uint32_t &newOffset )
{
    int32_t i;


    newOffset = 0;
    for( i = fCharacters.GetCount() - 1; i >= 0; i-- )
    {
        uint32_t thisOff = fCharacters[ i ].fBitmapOff + ( ( fCharacters[ i ].fHeight * fWidth * fBPP ) >> 3 );
        if( newOffset < thisOff )
        {
            newOffset = thisOff;
            break;
        }
    }

    if( newOffset >= ( ( fWidth * fHeight * fBPP ) >> 3 ) )
    {
        hsAssert( false, "Invalid position found in IGetFreeCharData()" );
        return nil;
    }

    // Return pointer to the new area
    return fBMapData + newOffset;
}

//// LoadFromP2FFile //////////////////////////////////////////////////////////
//  Handy quick wrapper 

hsBool  plFont::LoadFromP2FFile( const char *path )
{
    hsUNIXStream    stream;
    if( stream.Open( path, "rb" ) )
    {
        ReadRaw( &stream );
        return true;
    }
    return false;
}

//// LoadFromFNT //////////////////////////////////////////////////////////////
//  Load this font from the data found in the given Windows FNT file,
//  using the format specified in the Windows 3 Developers Notes.

hsBool  plFont::LoadFromFNT( const char *path )
{
    hsUNIXStream    stream;     // Ahh, irony
    if( !stream.Open( path, "rb" ) )
        return false;

    return LoadFromFNTStream( &stream );
}

hsBool  plFont::LoadFromFNTStream( hsStream *stream )
{
    IClear();

    try
    {

        // Note: hsUNIXStreams just happen to store in the same endian as Windows...
        struct FNTInfo
        {
            uint16_t  version;
            uint32_t  size;
            char    copyright[ 60 ];
            uint16_t  type;
            uint16_t  points;
            uint16_t  vertRes;
            uint16_t  horzRes;
            uint16_t  ascent;
            uint16_t  internalLeading;
            uint16_t  externalLeading;
            uint8_t   italic, underline, strikeout;
            uint16_t  weight;
            uint8_t   charSet;
            uint16_t  pixWidth; // 0 means variable width chars
            uint16_t  pixHeight;
            uint8_t   pitchFamily;
            uint16_t  avgWidth;
            uint16_t  maxWidth;
            uint8_t   firstChar, lastChar, defaultChar, breakChar;
            uint16_t  widthBytes;
            uint32_t  device, face;
            uint32_t  bitsPointer, bitsOffset;
            uint8_t   reserved;
            uint32_t  flags;
            uint16_t  aSpace, bSpace, cSpace;
            uint32_t  colorPointer;
            uint8_t   reserved1[ 16 ];

            void    Read( hsStream *s )
            {
                version = s->ReadLE16();
                size = s->ReadLE32();

                s->Read( sizeof( copyright ), copyright );
            
                s->ReadLE( &type );
                s->ReadLE( &points );
                s->ReadLE( &vertRes );
                s->ReadLE( &horzRes );
                s->ReadLE( &ascent );
                s->ReadLE( &internalLeading );
                s->ReadLE( &externalLeading );
                s->ReadLE( &italic );
                s->ReadLE( &underline );
                s->ReadLE( &strikeout );
                s->ReadLE( &weight );
                s->ReadLE( &charSet );
                s->ReadLE( &pixWidth );
                s->ReadLE( &pixHeight );
                s->ReadLE( &pitchFamily );
                s->ReadLE( &avgWidth );
                s->ReadLE( &maxWidth );
                s->ReadLE( &firstChar );
                s->ReadLE( &lastChar );
                s->ReadLE( &defaultChar );
                s->ReadLE( &breakChar );
                s->ReadLE( &widthBytes );
                s->ReadLE( &device );
                s->ReadLE( &face );
                s->ReadLE( &bitsPointer );
                s->ReadLE( &bitsOffset );
                s->ReadLE( &reserved );
                if( version == 0x0300 )
                {
                    s->ReadLE( &flags );
                    s->ReadLE( &aSpace );
                    s->ReadLE( &bSpace );
                    s->ReadLE( &cSpace );
                    s->ReadLE( &colorPointer );
                    s->Read( sizeof( reserved1 ), reserved1 );
                }
                else
                {
                    flags = 0;
                    aSpace = bSpace = cSpace = 0;
                    colorPointer = 0;
                }
            }
        } fntInfo;

        fntInfo.Read( stream );

        struct charEntry
        {
            uint16_t  width;
            uint32_t  offset;
            charEntry() { width = 0; offset = 0; }
        } *charEntries;

        int i, count = fntInfo.lastChar - fntInfo.firstChar + 2;
        charEntries = new charEntry[ count ];
        for( i = 0; i < count; i++ )
        {
            charEntries[ i ].width = stream->ReadLE16();
            if( fntInfo.version == 0x0200 )
                charEntries[ i ].offset = stream->ReadLE16();
            else
                charEntries[ i ].offset = stream->ReadLE32();
        }

        char faceName[ 256 ], deviceName[ 256 ];
        if( fntInfo.face != 0 )
        {
            stream->SetPosition( fntInfo.face );
            for( i = 0; i < 256; i++ )
            {
                faceName[ i ] = stream->ReadByte();
                if( faceName[ i ] == 0 )
                    break;
            }
            strncpy( fFace, faceName, sizeof( fFace ) );
        }
        if( fntInfo.device != 0 )
        {
            stream->SetPosition( fntInfo.device );
            for( i = 0; i < 256; i++ )
            {
                deviceName[ i ] = stream->ReadByte();
                if( deviceName[ i ] == 0 )
                    break;
            }
        }
        fSize = (uint8_t)(fntInfo.points);

        // Figure out what we need to allocate our bitmap as
        fWidth = 0;
        fHeight = 0;
        for( i = 0; i < count; i++ )
        {
            if( fWidth < charEntries[ i ].width )
                fWidth = charEntries[ i ].width;
            if( charEntries[ i ].offset > 0 )
                fHeight += fntInfo.pixHeight;
        }
        fBPP = 1;

        // Since we're 1 bbp, make sure width is a multiple of 8
        fWidth = ( ( fWidth + 7 ) >> 3 ) << 3;

        uint32_t widthInBytes = ( fWidth * fBPP ) >> 3;

        // Allocate our bitmap now
        uint32_t size = widthInBytes * fHeight;
        fBMapData = new uint8_t[ size ];
        memset( fBMapData, 0, size );

        fFirstChar = fntInfo.firstChar;
        fMaxCharHeight = 0;

        // Read the bitmap info
        uint32_t destOff = 0;
        for( i = 0; i < count; i++ )
        {
            int numCols = ( charEntries[ i ].width + 7 ) >> 3;
            int height = fntInfo.pixHeight;

            // Write a record for this char
            plCharacter outChar;
            outChar.fBitmapOff = destOff;
            outChar.fHeight = ( charEntries[ i ].offset == 0 ) ? 0 : height;
            outChar.fBaseline = fntInfo.ascent;
            outChar.fLeftKern = 0.f;
            outChar.fRightKern = (float)(charEntries[ i ].width - fWidth);
            fCharacters.Append( outChar );

            if( outChar.fHeight > fMaxCharHeight )
                fMaxCharHeight = outChar.fHeight;

            if( charEntries[ i ].offset == 0 )
                continue;

            // Seek to this char
            stream->SetPosition( charEntries[ i ].offset );

            // Write the actual bitmap data. Note: FNTs store the bits one column at a time,
            // one col after another, whereas we want it plain row by row
            int col, y;
            uint8_t *basePtr = fBMapData + destOff;
            for( col = 0; col < numCols; col++ )
            {
                uint8_t *yPtr = basePtr;
                for( y = 0; y < height; y++ )
                {
                    *yPtr = stream->ReadByte();
                    yPtr += widthInBytes;
                }
                basePtr++;
            }

            destOff += widthInBytes * outChar.fHeight;
        }

        delete [] charEntries;

        ICalcFontAscent();
        return true;
    }
    catch( ... )
    {
        // Somehow we crashed converting!
        IClear();
        return false;
    }
}

//// LoadFromBDF //////////////////////////////////////////////////////////////
//  Load this font from the data found in the given Adobe Systems BDF file,
//  using the format specified in the Glyph Bitmap Distribution Format (BDF)
//  Specification Version 2.2 from Adobe Systems.

/*hsBool    plFont::LoadFromBDF( const char *path, plBDFConvertCallback *callback )
{
    hsUNIXStream    stream;     // Ahh, irony
    if( !stream.Open( path, "rb" ) )
        return false;

    return LoadFromBDFStream( &stream, callback );
}
*/
// Some parsing helpers
typedef int (*fnCharTester)( int );

static int sQuoteTester( int c )
{
    return ( c == '\"' );
}

static int sDashTester( int c )
{
    return isspace( c ) || ( c == '-' );
}

class plLineParser
{
    protected:
        static char fLine[ 512 ];

        char    *fCursor, fRestore;

        void        IAdvanceToNextToken( fnCharTester tester = isspace )
        {
            // Last cursor
            *fCursor = fRestore;

            // Scan for the start of the next token
            while( *fCursor != 0 && (*tester)( *fCursor ) )
                fCursor++;

            if( *fCursor == 0 )
                return;

            // This is the start of our token
            const char *start = fCursor;

            // Put a stopper here
            fRestore = *fCursor;
            *fCursor = 0;

            // And return!
            return;
        }

        const char  *IGetNextToken( fnCharTester tester = isspace )
        {
            // Last cursor
            *fCursor = fRestore;

            // Scan for the start of the next token
            while( *fCursor != 0 && (*tester)( *fCursor ) )
                fCursor++;

            if( *fCursor == 0 )
                return nil;

            // This is the start of our token; find the end
            const char *start = fCursor;
            while( *fCursor != 0 && !(*tester)( *fCursor ) )
                fCursor++;

            // Put a stopper here
            fRestore = *fCursor;
            *fCursor = 0;

            // And return!
            return start;
        }

    public:

        plLineParser( const char *line )
        {
            strncpy( fLine, line, sizeof( fLine ) );
            fCursor = fLine;
            fRestore = *fCursor;
        }

        ~plLineParser() { }

        const char  *GetKeyword( void )
        {
            return IGetNextToken();
        }

        const char  *GetString( void )
        {
            IAdvanceToNextToken();
            return IGetNextToken( sQuoteTester );
        }

        const char  *GetKeywordNoDashes( void )
        {
            return IGetNextToken( sDashTester );
        }

        int32_t       GetInt( void )
        {
            return atoi( IGetNextToken() );
        }

        float    GetFloat( void )
        {
            return (float)atof( IGetNextToken() );
        }
};

char    plLineParser::fLine[ 512 ];


// Another helper--parser for various sections of the BDF format
class plBDFSectParser
{
    protected:
        plFont                  &fFont;
        plBDFConvertCallback    *fCallback;

    public:
        plBDFSectParser( plFont &myFont, plBDFConvertCallback *callback ) : fFont( myFont ), fCallback( callback ) {}

        virtual plBDFSectParser *ParseKeyword( const char *keyword, plLineParser &line )
        {
            return nil;
        }
};


class plBDFLookForEndCharParser : public plBDFSectParser
{
    public:
        plBDFLookForEndCharParser( plFont &myFont, plBDFConvertCallback *callback ) : plBDFSectParser( myFont, callback ) {}

        virtual plBDFSectParser *ParseKeyword( const char *keyword, plLineParser &line );
};

inline uint8_t    iHexCharToByte( char c )
{
    switch( c )
    {
        case '0': return 0;
        case '1': return 1;
        case '2': return 2;
        case '3': return 3;
        case '4': return 4;
        case '5': return 5;
        case '6': return 6;
        case '7': return 7;
        case '8': return 8;
        case '9': return 9;
        case 'a': case 'A': return 10;
        case 'b': case 'B': return 11;
        case 'c': case 'C': return 12;
        case 'd': case 'D': return 13;
        case 'e': case 'E': return 14;
        case 'f': case 'F': return 15;
        default: return 0;
    }
}
inline uint8_t    iHexStringToByte( const char *str )
{
    return ( iHexCharToByte( str[ 0 ] ) << 4 ) | iHexCharToByte( str[ 1 ] );
}

class plBDFCharsParser : public plBDFSectParser
{
    protected:

        // Info about the current character we're translating
        uint16_t              fWhichChar, fRowsLeft;
        plFont::plCharacter *fCharacter;
        uint8_t               *fBitmap;
        hsBool              fDoingData;
        uint32_t              fBytesWide, fBMapStride;

        inline void IReset( void )
        {
            fBitmap = nil;
            fCharacter = nil;
            fWhichChar = 0;
            fDoingData = false;
        }

    public:
        static uint32_t       fResolution;

        plBDFCharsParser( plFont &myFont, plBDFConvertCallback *callback ) : plBDFSectParser( myFont, callback ), fDoingData( false ) {}

        virtual plBDFSectParser *ParseKeyword( const char *keyword, plLineParser &line )
        {
            if( strcmp( keyword, "ENDFONT" ) == 0 )
            {
                // All done!
                return nil;
            }
            else if( strcmp( keyword, "ENDCHAR" ) == 0 )
            {
                // End of the character, reset
                IReset();
                if( fCallback != nil )
                    fCallback->CharDone();
            }
            else if( fDoingData )
            {
                // If we're doing data, all lines are hex values until we hit "ENDCHAR"
                if( fRowsLeft == 0 )
                    throw;

                int hDigit;
                for( hDigit = 0; *keyword != 0 && hDigit < fBytesWide; hDigit++, keyword += 2 )
                {
                    *fBitmap = iHexStringToByte( keyword );
                    fBitmap++;
                }

                fBitmap += fBMapStride - hDigit;
                fRowsLeft--;
            }
            else if( strcmp( keyword, "STARTCHAR" ) == 0 )
            {
                // Start of a new character--ignore the name, we'll just use the encoding
                IReset();
            }
            else if( strcmp( keyword, "ENCODING" ) == 0 )
            {
                int ch = line.GetInt();
                if( ch == -1 )
                {
                    // Nonstandard encoding, skip the character entirely
                    return new plBDFLookForEndCharParser( fFont, fCallback );
                }
                else
                {
                    fWhichChar = (uint16_t)(uint8_t)ch;

                    // Set up our pointer. Note that since BDFs don't tell us the starting character,
                    // we just make it 0
                    if( fFont.fCharacters.GetCount() < fWhichChar + 1 )
                        fFont.fCharacters.SetCount( fWhichChar + 1 );

                    fCharacter = &fFont.fCharacters[ fWhichChar ];
                }
            }
            // Horizontal mode offsets (writing mode 0)
            else if( strcmp( keyword, "SWIDTH" ) == 0 )
            {
                // In device units, unused
//              float fWidth = (float)line.GetInt() * ( (float)fFont.GetSize() / 1000.f ) * ( fResolution / 72.f );
//              fCharacter->fRightKern = fWidth - (float)fFont.fWidth;
//              fCharacter->fLeftKern = 0.f;
            }
            else if( strcmp( keyword, "DWIDTH" ) == 0 )
            {
                // In pixels, basically the offset to the next char. Note that we only
                // support the X direction (altho admittedly the idea of a font whose characters cause
                // the next chars to go up or down is way nifty)
                fCharacter->fRightKern = (float)line.GetInt() - (float)fFont.fWidth;
                fCharacter->fLeftKern = 0.f;
            }
            // Vertical mode offsets (unsupported)
            else if( strcmp( keyword, "SWIDTH1" ) == 0 )
            {

            }
            else if( strcmp( keyword, "DWIDTH1" ) == 0 )
            {

            }
            // Bitmap bounding box
            else if( strcmp( keyword, "BBX" ) == 0 )
            {
                int pixW = line.GetInt();
                int pixH = line.GetInt();
                int xOff = line.GetInt();
                int yOff = line.GetInt();

                // Got enough info now to allocate us a bitmap for this char
                fBitmap = fFont.IGetFreeCharData( fCharacter->fBitmapOff );
                if( fBitmap == nil )
                    throw false;

                if( fCharacter->fBitmapOff > ( ( fFont.fWidth * ( fFont.fHeight - pixH ) * fFont.fBPP ) >> 3 ) )
                {
                    hsAssert( false, "Invalid position found in IGetFreeCharData()" );
                    return nil;
                }

                // Set these now, since setting them before would've changed the IGetFreeCharData results
                fCharacter->fLeftKern = (float)xOff;
                fCharacter->fBaseline = yOff + pixH;
                fCharacter->fHeight = fRowsLeft = pixH;

                fBytesWide = ( pixW + 7 ) >> 3;
                fBMapStride = fFont.fWidth >> 3;
            }
            // Bitmap data
            else if( strcmp( keyword, "BITMAP" ) == 0 )
            {
                fDoingData = true;
            }
            // This keyword is outputted from the "getbdf" utility on linux, for some reason...
            else if( strcmp( keyword, "ATTRIBUTES" ) == 0 )
            {

            }
            else
                throw false;        // Invalid keyword

            return this;
        }
};

uint32_t plBDFCharsParser::fResolution = 72;


plBDFSectParser *plBDFLookForEndCharParser::ParseKeyword( const char *keyword, plLineParser &line )
{
    if( strcmp( keyword, "ENDCHAR" ) == 0 )
    {
        // Horray!
        return new plBDFCharsParser( fFont, fCallback );
    }
    // Just gobble lines until we find the endchar section
    return this;
}

class plBDFLookForCharParser : public plBDFSectParser
{
    public:
        plBDFLookForCharParser( plFont &myFont, plBDFConvertCallback *callback ) : plBDFSectParser( myFont, callback ) {}

        virtual plBDFSectParser *ParseKeyword( const char *keyword, plLineParser &line )
        {
            if( strcmp( keyword, "CHARS" ) == 0 )
            {
                // Horray!
                return new plBDFCharsParser( fFont, fCallback );
            }
            // Just gobble lines until we find the chars section
            return this;
        }
};

class plBDFPropertiesParser : public plBDFSectParser
{
    public:
        plBDFPropertiesParser( plFont &myFont, plBDFConvertCallback *callback ) : plBDFSectParser( myFont, callback ) {}

        virtual plBDFSectParser *ParseKeyword( const char *keyword, plLineParser &line )
        {
            // Note: the properties section is entirely optional and arbitrary, but we
            // parse it in case we can get more accurate info about the font name and props
            if( strcmp( keyword, "FACE_NAME" ) == 0 )
            {
                fFont.SetFace( line.GetString() );
            }
            else if( strcmp( keyword, "WEIGHT_NAME" ) == 0 )
            {
                if( stricmp( line.GetString(), "Bold" ) == 0 )
                    fFont.SetFlag( plFont::kFlagBold, true );
            }
            else if( strcmp( keyword, "ENDPROPERTIES" ) == 0 )
            {
                // Switch to waiting for the chars section
                return new plBDFLookForCharParser( fFont, fCallback );
            }
            // All tokens are technically valid, even if we don't recognize them
            return this;
        }
};

class plBDFHeaderParser : public plBDFSectParser
{
    public:
        plBDFHeaderParser( plFont &myFont, plBDFConvertCallback *callback ) : plBDFSectParser( myFont, callback ) {}

        virtual plBDFSectParser *ParseKeyword( const char *keyword, plLineParser &line )
        {
            if( strcmp( keyword, "STARTFONT" ) == 0 )
            {
                // Start of the font; check version #
                float version = line.GetFloat();
                if( version < 2.1f )
                    throw false;

                // Initial font values
                fFont.fFirstChar = 0;
                fFont.fMaxCharHeight = 0;
            }
            else if( strcmp( keyword, "FONT" ) == 0 )
            {
                // Postscript-style font name: figure out our face name and hopefully attributes too
                // Format is usually of the form: vendor-face-weight-otherStuff
                const char *vendor = line.GetKeywordNoDashes();
                const char *face = line.GetKeywordNoDashes();

                fFont.SetFace( face != nil ? face : vendor );

                const char *weight = line.GetKeywordNoDashes();

                if( weight != nil && stricmp( weight, "Bold" ) == 0 )
                    fFont.SetFlag( plFont::kFlagBold, true );
            }
            else if( strcmp( keyword, "COMMENT" ) == 0 )
            {
                // Comment, ignore
            }
            else if( strcmp( keyword, "CONTENTVERSION" ) == 0 )
            {
                // Content version, app specific, not used by us
            }
            else if( strcmp( keyword, "SIZE" ) == 0 )
            {
                // Point size and target resolution of this font
                fFont.SetSize( (uint8_t)(line.GetInt()) );
                plBDFCharsParser::fResolution = line.GetInt();
            }
            else if( strcmp( keyword, "FONTBOUNDINGBOX" ) == 0 )
            {
                // Max dimensions and base offsets
                // Note that we should've already grabbed the width from our
                // prescan earlier, to guard against malformed BDFs
                int thisWidth = line.GetInt();
                if( fFont.fWidth < thisWidth )
                    fFont.fWidth = thisWidth;

                // Since we're 1 bbp, make sure width is a multiple of 8
                fFont.fWidth = ( ( fFont.fWidth + 7 ) >> 3 ) << 3;

                // Allocate our data now
                fFont.fBMapData = new uint8_t[ ( fFont.fWidth * fFont.fHeight * fFont.fBPP ) >> 3 ];
                memset( fFont.fBMapData, 0, ( fFont.fWidth * fFont.fHeight * fFont.fBPP ) >> 3 );

                fFont.fMaxCharHeight = line.GetInt();
            }
            else if( strcmp( keyword, "METRICSSET" ) == 0 )
            {
                // Metrics set specification; unsupported
            }
            else if( strcmp( keyword, "STARTPROPERTIES" ) == 0 )
            {
                // Start of the properties section, switch to that
                return new plBDFPropertiesParser( fFont, fCallback );
            }
            else if( strcmp( keyword, "CHARS" ) == 0 )
            {
                // Allocate our bitmap if we haven't already

                // Since we're 1 bbp, make sure width is a multiple of 8
                if( fFont.fBMapData == nil )
                {
                    fFont.fWidth = ( ( fFont.fWidth + 7 ) >> 3 ) << 3;

                    // Allocate our data now
                    fFont.fBMapData = new uint8_t[ ( fFont.fWidth * fFont.fHeight * fFont.fBPP ) >> 3 ];
                    memset( fFont.fBMapData, 0, ( fFont.fWidth * fFont.fHeight * fFont.fBPP ) >> 3 );
                }

                // Start of the char section
                return new plBDFCharsParser( fFont, fCallback );
            }
            else
            {
                // Unrecognized token, abort
                throw false;
            }

            // Default, keep going with our parser
            return this;
        }
};

class plBDFCheckDimsParser : public plBDFSectParser
{
        hsBool  fSkipNext;

    public:

        uint32_t  fMaxWidth, fMaxHeight, fNumChars, fTotalHeight;
        uint16_t  fMaxChar;

        plBDFCheckDimsParser( plFont &myFont ) : plBDFSectParser( myFont, nil ) { fMaxWidth = fMaxHeight = fNumChars = fTotalHeight = 0; fSkipNext = false; fMaxChar = 0; }

        virtual plBDFSectParser *ParseKeyword( const char *keyword, plLineParser &line )
        {
            if( strcmp( keyword, "ENDFONT" ) == 0 )
            {
                // All done!
                return nil;
            }
            // Encoding
            else if( strcmp( keyword, "ENCODING" ) == 0 )
            {
                int ch = line.GetInt();
                if( ch == -1 )
                    // We skip these
                    fSkipNext = true;
                else
                {
                    fSkipNext = false;
                    if( fMaxChar < ch )
                        fMaxChar = ch;
                }
            }
            // Bitmap bounding box
            else if( strcmp( keyword, "BBX" ) == 0 )
            {
                if( fSkipNext )
                    return this;

                int pixW = line.GetInt();
                int pixH = line.GetInt();
                int xOff = line.GetInt();
                int yOff = line.GetInt();

                if( fMaxWidth < pixW )
                    fMaxWidth = pixW;
                if( fMaxHeight < pixH )
                    fMaxHeight = pixH;

                fNumChars++;

                fTotalHeight += pixH;
            }
            return this;
        }
};

hsBool  plFont::LoadFromBDFStream( hsStream *stream, plBDFConvertCallback *callback )
{
    return false;
}

hsBool  plFont::LoadFromBDF( const char *path, plBDFConvertCallback *callback )
{
    FILE *fp = fopen( path, "rt" );
    if( fp == nil )
        return false;
    try
    {
        IClear();

        char    line[ 512 ];

        // Run through the entire file first with a plBDFCheckDimsParser. This is because
        // some BDFs are naughty and don't report the correct fontboundingbox (i.e. too small)
        // (See the following loop below for details on the workings of this loop)
        plBDFCheckDimsParser    checkDims( *this );
        while( fgets( line, sizeof( line ), fp ) )
        {
            plLineParser    parser( line );
            const char *keyword = parser.GetKeyword();
            if( keyword != nil )
            {
                if( checkDims.ParseKeyword( keyword, parser ) == nil )
                    break;
            }
        }

        // Set up initial values
        fWidth = checkDims.fMaxWidth;
        fHeight = checkDims.fTotalHeight;
        fBPP = 1;

        // Pre-expand our char list
        fCharacters.ExpandAndZero( checkDims.fMaxChar + 1 );
        fCharacters.SetCount( 0 );

        if( callback != nil )
            callback->NumChars( (uint16_t)(checkDims.fNumChars) );

        // Rewind and continue normally
        fseek( fp, 0, SEEK_SET );

        // Start with the header parser
        plBDFSectParser *currParser = new plBDFHeaderParser( *this, callback );

        // Read from the stream one line at a time (don't want comments, and char #1 should be invalid for a BDF)
        while( fgets( line, sizeof( line ), fp ) && currParser != nil )
        {
            // Parse this one
            plLineParser    parser( line );

            // Get the keyword for this line
            const char *keyword = parser.GetKeyword();
            if( keyword != nil )
            {
                // Pass on to the current parser
                plBDFSectParser *newParser = currParser->ParseKeyword( keyword, parser );
                if( newParser != currParser )
                {
                    delete currParser;
                    currParser = newParser;
                }
            }
        }
    }
    catch( ... )
    {
        IClear();
        fclose( fp );
        return false;
    }

    fclose( fp );

    ICalcFontAscent();
    return true;
}

hsBool  plFont::ReadRaw( hsStream *s )
{
    s->Read( sizeof( fFace ), fFace );
    fSize = s->ReadByte();
    s->ReadLE( &fFlags );

    s->ReadLE( &fWidth );
    s->ReadLE( &fHeight );
    s->ReadLE( &fMaxCharHeight );

    fBPP = s->ReadByte();

    uint32_t size = ( fWidth * fHeight * fBPP ) >> 3;
    if( size > 0 )
    {
        fBMapData = new uint8_t[ size ];
        s->Read( size, fBMapData );
    }
    else
        fBMapData = nil;

    s->ReadLE( &fFirstChar );

    uint32_t i;
    fCharacters.SetCountAndZero( s->ReadLE32() );
    for( i = 0; i < fCharacters.GetCount(); i++ )
        fCharacters[ i ].Read( s );

    ICalcFontAscent();

    return true;
}

hsBool  plFont::WriteRaw( hsStream *s )
{
    s->Write( sizeof( fFace ), fFace );
    s->WriteByte( fSize );
    s->WriteLE( fFlags );

    s->WriteLE( fWidth );
    s->WriteLE( fHeight );
    s->WriteLE( fMaxCharHeight );

    s->WriteByte( fBPP );

    uint32_t size = ( fWidth * fHeight * fBPP ) >> 3;
    if( size > 0 )
        s->Write( size, fBMapData );

    s->WriteLE( fFirstChar );

    uint32_t i;
    s->WriteLE32( fCharacters.GetCount() );
    for( i = 0; i < fCharacters.GetCount(); i++ )
        fCharacters[ i ].Write( s );

    return true;
}