/*

    File:       SeedCFill.c

    Contains:   This snippet shows how to use the SeedCFill routine         

                to create a mask given a source image. As decribed          

                on page 71 of Inside Mac volume V, this routine             

                computes a destination bitmap image with 1's only           

                in the pixels where paint can not leak from the             

                starting seed point. This is similar to the paint-          

                bucket tool.        

    Written by: EL  

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

                You may incorporate this Apple sample source code into your program(s) without

                restriction. This Apple sample source code has been provided "AS IS" and the

                responsibility for its operation is yours. You are not permitted to redistribute

                this Apple sample source code as "Apple sample source code" after having made

                changes. If you're going to re-distribute the source, we require that you make

                it clear in the source that the code was descended from Apple sample source

                code, but that you've made changes.

    Change History (most recent first):

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

                                            for demonstration purposes.

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

*/

#include "CarbonPrefix.h"

#include <Dialogs.h>

#include <Fonts.h>

#include <Palettes.h>

#include <QDOffscreen.h>

#include <Resources.h>

#include <Quickdraw.h>

/* Constant Declarations */

#define WWIDTH      (176 * 2)

#define WHEIGHT     (106 * 2)

//#define WLEFT     (((qd.screenBits.bounds.right - qd.screenBits.bounds.left) - WWIDTH) / 2)

//#define WTOP      (((qd.screenBits.bounds.bottom - qd.screenBits.bounds.top) - WHEIGHT) / 2)

/* Global Variable Definitions */

WindowPtr   gWindow;

void initMac();

void createWindow();

void doSeedCFillExample();

void DisposeGrafPort(GrafPtr);

void doEventLoop();

void main(void)

{

    initMac();

    createWindow();

    doEventLoop();

}

void initMac()

{

    //MaxApplZone();

    //InitGraf( &qd.thePort );

    //InitFonts();

    //InitWindows();

    //InitMenus();

    //TEInit();

    //InitDialogs( nil );

    InitCursor();

    FlushEvents( 0, everyEvent );

}

void createWindow()

{

    Rect            rect;

    PaletteHandle   palette;

    BitMap          bitMap;

    int             left, top;

    GetQDGlobalsScreenBits(&bitMap);

    left = (((bitMap.bounds.right - bitMap.bounds.left) - WWIDTH) / 2);

    top = (((bitMap.bounds.bottom - bitMap.bounds.top) - WHEIGHT) / 2);

    //SetRect( &rect, WLEFT, WTOP, WLEFT + WWIDTH, WTOP + WHEIGHT );

    SetRect( &rect, left, top, left + WWIDTH, top + WHEIGHT );

    gWindow = NewCWindow( 0L, &rect, "\pClick anywhere in left image.", true, documentProc,

                            (WindowPtr)-1L, true, 0L );

    //SetPort( gWindow );

    SetPortWindowPort( gWindow );

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

    /* Attach a palette of the default colortable to the window.                */

    /*  WARNING: SeedCFill may not work if the current gDevice's colortable is  */

    /*  different than that of the offscreen's colortable.  This offscreen is   */

    /*  the one passed into SeedCFill.  To eliminate this problem, we attach a  */

    /*  palette contaning the same colors used by the offscreen to the window.  */

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

    palette = NewPalette( 256, GetCTable( 8 ), pmTolerant, 0 );

    SetPalette( gWindow, palette, true );

}

void doSeedCFillExample( point )

Point   point;

{

    PicHandle       pict;               /* Pict used for the source. */

    GWorldPtr       source;             /* Gworld used to store the pict. */

    PixMapHandle    sourcePixMap;       /* Handle to the source Gworld. */

    //GrafPtr           mask;           /* BitMap used for creating the mask. */

    int             seedH, seedV;       /* Pixel position used to determine the mask. */

    Rect            rect;               /* Bounding rect of mask and source. */

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

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

    Rect            tempRect1;

    GrafPtr         oldPort;

    GWorldPtr       newMask;            // new mask, use a GWorld as opposed to a new port

    GetPort(&oldPort);

    SetPortWindowPort( gWindow );

    /* Load the pict resource to be used for the source. */

    pict = (PicHandle)GetResource( 'PICT', 128 );

    /* Define the bounding rect for the source and mask. */

    rect = (**pict).picFrame;

    OffsetRect( &rect, -rect.left, -rect.top );

    rect.right *= 2;

    rect.bottom *= 2;

    /* Draw the source image in the window to see what the mask will be created from. */

    DrawPicture( pict, &rect );

    /* Return if mouse click was not within the source rect. */

    if (point.h < rect.left || point.h > rect.right ||

        point.v < rect.top || point.v > rect.bottom)

            return;

    /* Create a gworld to store the pict. */

    NewGWorld( &source, 8, &rect, GetCTable( 8 ), nil, 0 );

    LockPixels( GetGWorldPixMap( source ) );

    sourcePixMap = GetGWorldPixMap( source );

    /* Draw the pict into the gworld. */

    GetGWorld( &currentPort, &currentDevice );

    SetGWorld( source, nil );

    DrawPicture( pict, &rect );

    /* Allocate a bitmap for the mask. */

    NewGWorld( &newMask, 1, &(**sourcePixMap).bounds, nil, nil, 0 );

    SetGWorld( newMask, nil);

    EraseRect( &(**sourcePixMap).bounds );

    SetGWorld( currentPort, currentDevice );

    /* Use the mouse click as the starting seed position. */

    seedH = point.h;

    seedV = point.v;

    /* Create a mask from the source, starting from the seed point. */

    /*SeedCFill( (BitMap *)*sourcePixMap, &(*mask).portBits, &(**sourcePixMap).bounds,

                &(*mask).portRect, seedH, seedV, nil, 0 );*/

    LockPixels(GetGWorldPixMap(newMask));

    SeedCFill( (BitMap *)*sourcePixMap, (BitMap *) *(GetGWorldPixMap(newMask)), &(**sourcePixMap).bounds,

                GetPortBounds(newMask, &tempRect1), seedH, seedV, nil, 0 );

    /* Draw a red cross where the mouse was last clicked. */

    ForeColor( redColor );

    MoveTo( rect.left + seedH - 2, seedV );

    LineTo( rect.left + seedH + 2, seedV );

    MoveTo( rect.left + seedH, seedV - 2 );

    LineTo( rect.left + seedH, seedV + 2 );

    ForeColor( blackColor );

    BackColor( whiteColor );

    OffsetRect( &rect, (**sourcePixMap).bounds.right, 0 );

    EraseRect( &rect );

    /* Copy the source to the window while applying the mask. */

    /*CopyMask( (BitMap *)*sourcePixMap, &((GrafPtr)mask)->portBits, &gWindow->portBits,

                &(**sourcePixMap).bounds, &((GrafPtr)mask)->portRect, &rect );*/

    CopyMask( (BitMap *)*sourcePixMap, (BitMap *) *(GetGWorldPixMap(newMask)), GetPortBitMapForCopyBits(GetWindowPort(gWindow)),

                &(**sourcePixMap).bounds, GetPortBounds(newMask, &tempRect1), &rect );

    /* Release the used memory. */

    //DisposeGrafPort( (GrafPtr)mask );

    UnlockPixels(GetGWorldPixMap(newMask));

    UnlockPixels(GetGWorldPixMap(source));

    DisposeGWorld( newMask );

    DisposeGWorld( source );

    HPurge( (Handle)pict );

    SetPort(oldPort); //restore port

}

void DisposeGrafPort( GrafPtr doomedPort )  /* DisposeGrafPort originally written by Forrest Tanaka. */

{

    //ClosePort( doomedPort );

    //DisposePtr( doomedPort->portBits.baseAddr );

    DisposePtr( GetPortBitMapForCopyBits(doomedPort)->baseAddr );

    //DisposePtr( (Ptr)doomedPort );

    DisposePort( doomedPort );

}

void doEventLoop()

{

    EventRecord     event;

    WindowPtr       window;

    short           clickArea;

    Rect            screenRect;

    static Point    point = { -1, -1 };

    for (;;)

    {

        if (WaitNextEvent( everyEvent, &event, 0, nil ))

        {

            if (event.what == mouseDown)

            {

                clickArea = FindWindow( event.where, &window );

                if (clickArea == inDrag)

                {

                    //screenRect = (**GetGrayRgn()).rgnBBox;

                    GetRegionBounds(GetGrayRgn(), &screenRect);

                    DragWindow( window, event.where, &screenRect );

                }

                else if (clickArea == inContent)

                {

                    if (window != FrontWindow())

                        SelectWindow( window );

                    else

                    {

                        point = event.where;

                        GlobalToLocal( &point );

                        doSeedCFillExample( point );

                    }

                }

                else if (clickArea == inGoAway)

                    if (TrackGoAway( window, event.where ))

                        return;

            }

            else if (event.what == updateEvt)

            {

                window = (WindowPtr)event.message;  

                //SetPort( window );

                BeginUpdate( window );

                doSeedCFillExample( point );

                EndUpdate( window );

            }

        }

    }

}