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<div style="width:100%; position:fixed;"><div align="center" id="watermark" style="position: relative; margin-left:auto; margin-right:auto; z-index:20; width:500px;"><div class="legacybox"><h1>Legacy Document<span class=closebutton><a href="javascript:closeWatermark()"><img src="../../images/closebutton.png" width="14" height="14" border="0" alt="close button"></a></span></h1>
<p><strong>Important: </strong>This document is part of the Legacy section of the ADC Reference Library. This information should not be used for new development.</p>
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<h2>/CodeWarrior (OS 9)/SeedCFill.c</h2>
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<p><strong><a href="SeedCFill.zip">Download Sample</a></strong> (“SeedCFill.zip”, 47.6K)<BR>
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<pre class="sourcecodebox">/* 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 ); } } }}</pre>
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