155 lines
3.6 KiB
C
155 lines
3.6 KiB
C
/*
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* Copyright 1998 by Alan Hourihane, Wigan, England.
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of Alan Hourihane not be used in
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* advertising or publicity pertaining to distribution of the software without
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* specific, written prior permission. Alan Hourihane makes no representations
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* about the suitability of this software for any purpose. It is provided
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* "as is" without express or implied warranty.
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*
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* ALAN HOURIHANE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL ALAN HOURIHANE BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*
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* Authors: Alan Hourihane, <alanh@fairlite.demon.co.uk>
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*
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* Generic RAMDAC access routines.
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*/
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#ifdef HAVE_XORG_CONFIG_H
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#include <xorg-config.h>
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#endif
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#include "xf86.h"
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#include "xf86_OSproc.h"
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#include "xf86RamDacPriv.h"
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int RamDacHWPrivateIndex = -1;
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int RamDacScreenPrivateIndex = -1;
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RamDacRecPtr
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RamDacCreateInfoRec()
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{
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RamDacRecPtr infoRec;
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infoRec = xcalloc(1, sizeof(RamDacRec));
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return infoRec;
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}
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RamDacHelperRecPtr
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RamDacHelperCreateInfoRec()
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{
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RamDacHelperRecPtr infoRec;
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infoRec = xcalloc(1, sizeof(RamDacHelperRec));
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return infoRec;
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}
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void
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RamDacDestroyInfoRec(RamDacRecPtr infoRec)
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{
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xfree(infoRec);
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}
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void
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RamDacHelperDestroyInfoRec(RamDacHelperRecPtr infoRec)
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{
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xfree(infoRec);
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}
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Bool
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RamDacInit(ScrnInfoPtr pScrn, RamDacRecPtr ramdacPriv)
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{
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RamDacScreenRecPtr ramdacScrPtr;
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/*
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* make sure the RamDacRec is allocated
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*/
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if (!RamDacGetRec(pScrn))
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return FALSE;
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ramdacScrPtr =
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((RamDacScreenRecPtr) (pScrn)->privates[RamDacGetScreenIndex()].ptr);
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ramdacScrPtr->RamDacRec = ramdacPriv;
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return(TRUE);
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}
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void
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RamDacGetRecPrivate()
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{
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if (RamDacHWPrivateIndex < 0)
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RamDacHWPrivateIndex = xf86AllocateScrnInfoPrivateIndex();
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if (RamDacScreenPrivateIndex < 0)
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RamDacScreenPrivateIndex = xf86AllocateScrnInfoPrivateIndex();
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return;
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}
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Bool
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RamDacGetRec(ScrnInfoPtr scrp)
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{
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RamDacGetRecPrivate();
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/*
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* New privates are always set to NULL, so we can check if the allocation
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* has already been done.
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*/
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if (scrp->privates[RamDacHWPrivateIndex].ptr != NULL)
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return TRUE;
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if (scrp->privates[RamDacScreenPrivateIndex].ptr != NULL)
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return TRUE;
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scrp->privates[RamDacHWPrivateIndex].ptr =
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xnfcalloc(sizeof(RamDacHWRec), 1);
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scrp->privates[RamDacScreenPrivateIndex].ptr =
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xnfcalloc(sizeof(RamDacScreenRec), 1);
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return TRUE;
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}
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void
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RamDacFreeRec(ScrnInfoPtr pScrn)
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{
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RamDacHWRecPtr ramdacHWPtr;
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RamDacScreenRecPtr ramdacScrPtr;
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if (RamDacHWPrivateIndex < 0)
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return;
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if (RamDacScreenPrivateIndex < 0)
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return;
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ramdacHWPtr = RAMDACHWPTR(pScrn);
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ramdacScrPtr = ((RamDacScreenRecPtr)
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(pScrn)->privates[RamDacGetScreenIndex()].ptr);
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if (ramdacHWPtr)
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xfree(ramdacHWPtr);
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ramdacHWPtr = NULL;
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if (ramdacScrPtr)
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xfree(ramdacScrPtr);
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ramdacScrPtr = NULL;
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}
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int
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RamDacGetHWIndex()
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{
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return RamDacHWPrivateIndex;
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}
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int
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RamDacGetScreenIndex()
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{
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return RamDacScreenPrivateIndex;
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}
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