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<a href="http://developer.apple.com/">ADC Home</a> > <a href="../../referencelibrary/index.html">Reference Library</a> > <a href="../../samplecode/index.html">Sample Code</a> > <a href="../../samplecode/LegacyTechnologies/index.html">Legacy Documents</a> > <a href="../../samplecode/LegacyTechnologies/idxGraphicsImaging-date.html">Graphics & Imaging</a> > <A HREF="javascript:location.replace('index.html');">RotateString</A> >
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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)/RotateString.c</h2>
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<pre class="sourcecodebox">/* 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. 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 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 shape now.*/#include "CarbonPrefix.h"#include <Memory.h>#include <QDOffscreen.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;}</pre>
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