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xsavescr.c
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xsavescr.c
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/*
* __XSaveScreen()/__XRestScreen() functions
*
* Copyright 1999-2001 Viktor Szakats (vszakats.net/harbour) (Rewritten in C)
* Copyright 1999 Paul Tucker <ptucker@sympatico.ca>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; see the file COPYING.txt. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA (or visit the web site https://www.gnu.org/).
*
* As a special exception, the Harbour Project gives permission for
* additional uses of the text contained in its release of Harbour.
*
* The exception is that, if you link the Harbour libraries with other
* files to produce an executable, this does not by itself cause the
* resulting executable to be covered by the GNU General Public License.
* Your use of that executable is in no way restricted on account of
* linking the Harbour library code into it.
*
* This exception does not however invalidate any other reasons why
* the executable file might be covered by the GNU General Public License.
*
* This exception applies only to the code released by the Harbour
* Project under the name Harbour. If you copy code from other
* Harbour Project or Free Software Foundation releases into a copy of
* Harbour, as the General Public License permits, the exception does
* not apply to the code that you add in this way. To avoid misleading
* anyone as to the status of such modified files, you must delete
* this exception notice from them.
*
* If you write modifications of your own for Harbour, it is your choice
* whether to permit this exception to apply to your modifications.
* If you do not wish that, delete this exception notice.
*
*/
#include "hbapigt.h"
#include "hbstack.h"
/* NOTE: In original CA-Cl*pper 5.x these functions are written in Clipper
[vszakats] */
typedef struct
{
int row;
int col;
int maxrow;
int maxcol;
void * buffer;
} HB_SCRDATA, * PHB_SCRDATA;
static void hb_xSaveRestRelease( void * cargo )
{
PHB_SCRDATA pScrData = ( PHB_SCRDATA ) cargo;
if( pScrData->buffer )
hb_xfree( pScrData->buffer );
}
static HB_TSD_NEW( s_scrData, sizeof( HB_SCRDATA ), NULL, hb_xSaveRestRelease );
HB_FUNC( __XSAVESCREEN )
{
PHB_SCRDATA pScrData = ( PHB_SCRDATA ) hb_stackGetTSD( &s_scrData );
HB_SIZE nSize;
hb_gtGetPos( &pScrData->row, &pScrData->col );
pScrData->maxrow = hb_gtMaxRow();
pScrData->maxcol = hb_gtMaxCol();
hb_gtRectSize( 0, 0, pScrData->maxrow, pScrData->maxcol, &nSize );
if( pScrData->buffer )
hb_xfree( pScrData->buffer );
pScrData->buffer = hb_xgrab( nSize );
hb_gtSave( 0, 0, pScrData->maxrow, pScrData->maxcol, pScrData->buffer );
}
/* NOTE: There's no check about the screen size on restore, so this will
fail if the user has changed the screen resolution between calling
save and restore.
[vszakats] */
HB_FUNC( __XRESTSCREEN )
{
PHB_SCRDATA pScrData = ( PHB_SCRDATA ) hb_stackTestTSD( &s_scrData );
if( pScrData && pScrData->buffer )
{
hb_gtRest( 0, 0, pScrData->maxrow, pScrData->maxcol, pScrData->buffer );
hb_xfree( pScrData->buffer );
pScrData->buffer = NULL;
hb_gtSetPos( pScrData->row, pScrData->col );
}
}