/*

    File:       RotateString.c

    Contains:   This function will return a BitMap that contains the

                text passed rotated 90¡

                The font characteristics are copied from

                the current port before creating the BitMap.

    Written by: RT and BS

    Copyright:  Copyright © 1992-1999 by Apple Computer, Inc., All Rights Reserved.

    Disclaimer: IMPORTANT:  This Apple software is supplied to you by Apple Computer, Inc.

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    Change History (most recent first):

        6/2003      MK          Updated for ProjectBuilder

        08/2000     JM              Carbonized, non-Carbon code is commented out

                                                        for demonstration purposes.

        7/14/1999   KG              Updated for Metrowerks Codewarror Pro 2.1

        8/27/92     BS              added a direction parameter to the end. It will 

                                    rotate in the direction you specify. ALSO fixed 

                                    some LAME bugs, such as the rotate routine did not 

                                    preserve the current port,and it also did not dispose 

                                    of a temporary bitmap it used.  Should be in good

                                    hape now.

*/

#include "CarbonPrefix.h"

#include "RotateString.h"

/*

    In pascal this is:

 function RotateString (str: Str255; var destMap: BitMap, direction : integer): OSErr;

*/

pascal OSErr RotateString( Str255 str, BitMap *destMap, short direction)

{

    //GrafPort  srcPort;

    //GrafPtr       srcPortPtr;

    char        *srcPtr, *destPtr;

    FontInfo    f;

    short       heightBits, heightBytes;

    short       width, widthBytes;

    short       rotateWidth;

    short       rotateHeight;

    short       row, column;

    short       texFont,texFace,texMode,texSize;    

    short       err;

    //Rect      tempRect1;

    RgnHandle   rgnHandle = NewRgn();

    CGrafPtr    currentPort;        /* Saved CGrafPtr for later restore. */

    GDHandle    currentDevice;      /* Saved device for later restore. */

    GWorldPtr   sourceGWorld;

    Rect        rect;

    int         sourceRowBytes;

    GetGWorld( &currentPort, &currentDevice );

    /*texFont = qd.thePort->txFont;

    texFace = qd.thePort->txFace;

    texMode = qd.thePort->txMode;

    texSize = qd.thePort->txSize;*/

    texFont = GetPortTextFont(GetQDGlobalsThePort());

    texFace = GetPortTextFace(GetQDGlobalsThePort());

    texMode = GetPortTextMode(GetQDGlobalsThePort());

    texSize = GetPortTextSize(GetQDGlobalsThePort());

    //OpenPort( &srcPort);

    //srcPortPtr = CreateNewPort();

    //SetPort(&srcPort);

    //SetPort(srcPortPtr);

    TextFont(texFont);  

    TextFace(texFace);  

    TextMode(texMode);  

    TextSize(texSize);

    GetFontInfo( &f);

    heightBits = f.ascent + f.descent + f.leading;

    heightBytes = ((heightBits + 7) & 0x7FF8) >> 3;

    width = StringWidth( str );

    widthBytes = ((width + 7) & 0x7FF8) >> 3;

    rotateWidth = heightBytes;

    rotateHeight = widthBytes << 3;

    //srcPort.portBits.baseAddr = NewPtrClear( widthBytes * heightBits);

    /*(*(GetPortPixMap(srcPortPtr)))->baseAddr = NewPtrClear( widthBytes * heightBits );

    if(err = MemError()) return err;

    //srcPort.portBits.rowBytes = widthBytes;

    (*(GetPortPixMap(srcPortPtr)))->rowBytes = widthBytes;

    //SetRect( &srcPort.portBits.bounds, 0, 0, width, heightBits);

    SetRect( GetPortBounds(srcPortPtr, &tempRect1), 0, 0, width, heightBits );*/

    SetRect( &rect, 0, 0, width, heightBits );

    NewGWorld( &sourceGWorld, 1, &rect, nil, nil, 0 );

    SetGWorld( sourceGWorld, nil );

    EraseRect(&rect);

    TextFont(texFont);  

    TextFace(texFace);  

    TextMode(texMode);  

    TextSize(texSize);

    sourceRowBytes = GetPixRowBytes(GetGWorldPixMap(sourceGWorld));

    destMap->baseAddr = NewPtrClear( rotateWidth * rotateHeight);

    if(err = MemError()) {

        //DisposePtr(srcPort.portBits.baseAddr);

        DisposeGWorld(sourceGWorld);

        return err;

    }

    destMap->rowBytes = rotateWidth;

    SetRect( &destMap->bounds, 0, 0, rotateWidth * 8, rotateHeight);

    //RectRgn(srcPort.visRgn,&srcPort.portBits.bounds);

    RectRgn(GetPortVisibleRegion(sourceGWorld, rgnHandle), &(*(GetGWorldPixMap(sourceGWorld)))->bounds);

    MoveTo( 0, f.ascent);  // change 2.0.1 <CKH> was heightBits

    DrawString( str );

    /*****************************************/

    /*  Rotate Algorithm                     */

    /*****************************************/

    LockPixels(GetGWorldPixMap(sourceGWorld));

    //srcPtr = srcPort.portBits.baseAddr;       // Start at the Top,Left

    srcPtr = (*(GetGWorldPixMap(sourceGWorld)))->baseAddr;

    if(direction == counterClockWise)       // Start at the Bottom,Left

        destPtr = destMap->baseAddr + ((rotateHeight-1) * rotateWidth);

    else                                    // Start at the Top,Left

        destPtr = destMap->baseAddr;

    for( column = 0; column < width; column++)      /* width is in pixels */

    {

        for( row = 0; row < heightBits; row++)      /* height in pixels, too */

        {

            if(direction == counterClockWise) {

                /* We are rotating left ( counter clock-wise) thus */

                /*  as we search across the top of the horizontal pixel bit map,    */

                /*  we write down the right edge of the vertical pixel bit map */

                if( *(srcPtr                        /* Begin with the upper left corner */ 

                        //+ (row*widthBytes)            /* Move down a row */

                        + (row * sourceRowBytes)

                        + (column >> 3))            /* Go to the first even byte */

                        & (0x80>>(column & 7)) )    /* calculate a shifted bit position based on the column */

                    {

                        *(destPtr                   /* Begin in the lower left corner */

                            - (column*rotateWidth)  /* Subtract, move up for each row */

                            + (row >> 3))           /* Calculate a bit position for the column */

                            |= (0x80>>(row & 7));   /* Set a bit based on the column */

                    }

            } else {    /* clockWise */

                /*  We are rotating right (clock-wise) thus */

                /*  as we search across the top of the horizontal pixel bit map,    */

                /*  we write down the left edge of the vertical pixel bit map */

                if( *(srcPtr                        /* Begin with the upper left corner */ 

                        //+ (row*widthBytes)            /* Move down a row */

                        + (row * sourceRowBytes)

                        + (column >> 3))            /* Go to the first even byte */

                        & (0x80>>(column & 7)) )    /* calculate a shifted bit position based on the column */

                    {

                        *(destPtr                   /* Begin in the lower left corner */

                        + (column*rotateWidth) /* Add, move down for each row */

                        - (row >> 3))           /* Calculate a bit position for the column */

                        |= (0x01<<(row & 7));   /* Set a bit based on the column */

                    }

            }

        }

    }

    /* clean up the used source BitMap, and restore the ports properly */   

    //DisposePtr(srcPort.portBits.baseAddr);

    UnlockPixels(GetGWorldPixMap(sourceGWorld));

    DisposeGWorld(sourceGWorld);

    //ClosePort(&srcPort);

    SetGWorld( currentPort, currentDevice );

    DisposeRgn(rgnHandle);

    return noErr;

}