text1.c

nucleus 文件系统,内核和彩色图形系统,在小系统上非常好用

/*************************************************************************/
/*                                                                       */
/*         Copyright (c) 1997 - 1999 Accelerated Technology, Inc.        */
/*                                                                       */
/* PROPRIETARY RIGHTS of Accelerated Technology are involved in the      */
/* subject matter of this material.  All manufacturing, reproduction,    */
/* use, and sales rights pertaining to this subject matter are governed  */
/* by the license agreement.  The recipient of this software implicitly  */
/* accepts the terms of the license.                                     */
/*                                                                       */
/*************************************************************************/

/*************************************************************************/
/*                                                                       */
/* FILE NAME                                            VERSION          */
/*                                                                       */
/*      TEXT1.c                                          1.9             */
/*                                                                       */
/* COMPONENT                                                             */
/*                                                                       */
/*      All                                                              */
/*                                                                       */
/* DESCRIPTION                                                           */
/*                                                                       */
/*      This file contains the SetFont and SetWorkGrafmap functions.     */
/*                                                                       */
/* AUTHOR                                                                */
/*                                                                       */
/*      Giac Dinh, Accelerated Technology, Inc.                          */
/*                                                                       */
/* DATA STRUCTURES                                                       */
/*                                                                       */
/*      None                                                             */
/*                                                                       */
/* FUNCTIONS                                                             */
/*                                                                       */
/*      None                                                             */
/*                                                                       */
/* DEPENDENCIES                                                          */
/*                                                                       */
/*      None                                                             */
/*                                                                       */
/* HISTORY                                                               */
/*                                                                       */
/*         NAME            DATE                    REMARKS               */
/*                                                                       */
/*         BobB           9/10/98     Corrected for synthetic facing     */
/*         BobB          11/16/99    Got rid of ANSI compiler warnings   */
/*                                                                       */
/*************************************************************************/

#include "meta_wnd.h"
#include "metconst.h"    /* MetaWINDOW Constant & Stucture Definitions */
#include "metports.h"    /* MetaWINDOW Port & Bitmap Definitions */
#include "grafdata.h"
#include "metmacs3.h"
#include "metfonts.h"
#include "wndo.h"
 

/* Function SETFONT sets the specified font record, FONT, to be the 
   current font.  */
#define		MAJORVER	0x02
#define		MINORVER	0x20

void SetFont( fontRcd *FONT)

{
	void InitBitmap(int argDEVICE, grafMap *argGRAFMAP);
	void InitRowTable(grafMap *argBitMap, int argInrLve, int argInrSeg, int argInrSiz);
	void SetWorkGrafmap(short);
	void mwTxtBltH();
	int  i;
	grafMap *bmapPtr;
	long fontPtr;
	long *adsRowTbl;
	short ErrValue;
	char METASIG[] = "NU__FONT";

	if(FONT == 0)
		return;    /* exit if NULL pointer  */


/* Verify NU__FONT signature  */
	for(i=0; i< 8; i++)
	{
		if(FONT->fontSign[i] != METASIG[i])
		{
			ErrValue = c_SetFont + c_BadFontVer;
			nuGrafErr(ErrValue);
			FONT = (fontRcd *) imbFnt;
			break;
		}
	}

	/* Check if font version meets requirement  */

	if(((FONT->fontVer & 0x0F) != MAJORVER) || (FONT->fontVer < MINORVER))
	{
		ErrValue = c_SetFont + c_BadFontVer;
		nuGrafErr(ErrValue);
		FONT = (fontRcd *) imbFnt;
	}

/* At this point we have a validated font buffer  */
	grafPort.txFont = (long) FONT;
	thePort->txFont = (long) FONT;

	fntVertTbl[alignTop] = 0;

	fntVertTbl[alignBaseline] = FONT->ascent - 1;
	
	fntVertTbl[alignBottom] = FONT->chHeight - 1;

	fntVertTbl[alignMiddle] = FONT->chHeight >> 1;

/* Set current vertical aligment  */
	fntVertAln = fntVertTbl[grafPort.txAlign.Y];

/* Initialize the Bitmapped and bitmap font's grafMap */
	if(!(FONT->fontFlags & fontType))
	{
		
		bmapPtr = (grafMap *) ((long) FONT + FONT->bmapTbl); 
		fontPtr = (long) FONT + FONT->fontTbl; 
		adsRowTbl = (long *) ((long) FONT + FONT->rowTbl);
			
		#ifdef FIXUP386
		fontPtr += dllFixup;
		#endif

/* Instal into font's grafMap record  */
		bmapPtr->mapTable[0] = (long **) adsRowTbl;
		*adsRowTbl = fontPtr;

		bmapPtr->devTech = dtUser;
/* Initialize a user defined grafMap  */
		InitBitmap(cUSER, bmapPtr);
/* Set flag indicating a linear bitmap for best speed  */
		bmapPtr->mapFlags = (short) mfRowTabl;

		InitRowTable(bmapPtr, 0, 0, 0);

		#ifdef FIXUP386
			bmapPtr->mapTable[0] += dllFixup;
		#endif

/* Set the current bitmapped text draw vector  */
		txtDrwIDV = mwTxtBltH;

/* Initialize the worspace grafmap for syth facing  */
		SetWorkGrafmap(FONT->chHeight);
	}

/* InitStroked set the current stoked text draw vectors to initialize  */
	else
	{
		txtDrwIDV = txtStrokeIDV;
		if(grafPort.txAlign.X == 0)
			txtAlnIDV = txtStrokeIDV;
	}

/* Set current text align vector  */
	txtAlnIDV = txtDrwIDV;
	if(grafPort.txAlign.X != alignLeft)
		txtAlnIDV = txtAPPIDV;
	
	return;
}



/* Function SetWorkGrafmap setups the workspaces grafmap and rowtable to allow 
   blits from the workspace. The grafmap height is passed in font_Height, and
   the width is set for the maximum allowable in the cuurent workspace buffer  */

void SetWorkGrafmap(short font_Height )
{
	void InitBitmap(int argDEVICE, grafMap *argGRAFMAP);
	void InitRowTable(grafMap *argBitMap, int argInrLve, int argInrSeg, int argInrSiz);

	/* de-allocate old rowtable */
	mpWorkEnd += mpRowTblSz;

/* Allocate this rowtable  */
	mpRowTblSz = font_Height << 2;
	mpWorkEnd -= mpRowTblSz;

/* mpWorkEnd now is a pointer to the workspace rowtable  */

	workGrafMap.mapTable[0] = (long **) mpWorkEnd;

/* BobB 9/9/98 - added the following line to set up first rowtable */
	*workGrafMap.mapTable[0] = (long *) mpWorkSpace;

/* Set first row table entry to start of work buffer  */
	#ifdef FIXUP386
		mpWorkEnd += dllFixup;	
	#endif

/* Compute size of remaining workspace  */
/* Per raster calculation  */	

	workGrafMap.pixBytes = ((short) (mpWorkEnd - mpWorkSpace)) / font_Height;
	workGrafMap.pixWidth = workGrafMap.pixBytes << 3;
	workGrafMap.pixHeight = font_Height;

/* Set as monoChrome - no driver  */
	workGrafMap.pixBits   = 1;
	workGrafMap.pixPlanes = 1;
/* Set devTech so no primitives loaded  */
	workGrafMap.devTech   = dtUser;

/* initialize the grafmap  */
	InitBitmap(cUSER, &workGrafMap);

/* Set flag indicating a linear bitmap for best speed  */
	workGrafMap.mapFlags = mfRowTabl;

	InitRowTable(&workGrafMap, 0, 0, 0);

	#ifdef FIXUP386
		workGrafMap.mapTable[0] += dllFixup;
	#endif 

	return;
}