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/*
* Support for accelerated rootless code
*/
/*
* Copyright (c) 2004 Torrey T. Lyons. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the name(s) of the above copyright
* holders shall not be used in advertising or otherwise to promote the sale,
* use or other dealings in this Software without prior written authorization.
*/
/* $XdotOrg: xc/programs/Xserver/miext/rootless/accel/rlAccel.c,v 1.5 2005/07/03 07:02:03 daniels Exp $ */
/*
* The accelerated rootless code replaces some GC operations from fb with
* versions that call the rootless acceleration functions where appropriate.
* To work properly, this must be wrapped directly on top of fb. Nothing
* underneath this layer besides fb will get called.
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include "rootless.h"
#include "rlAccel.h"
typedef struct _rlAccelScreenRec {
CreateGCProcPtr CreateGC;
CloseScreenProcPtr CloseScreen;
} rlAccelScreenRec, *rlAccelScreenPtr;
static int rlAccelScreenPrivateIndex = -1;
#define RLACCELREC(pScreen) \
((rlAccelScreenRec *)(pScreen)->devPrivates[rlAccelScreenPrivateIndex].ptr)
/* This is mostly identical to fbGCOps. */
static GCOps rlAccelOps = {
rlFillSpans,
fbSetSpans,
fbPutImage,
rlCopyArea,
fbCopyPlane,
fbPolyPoint,
fbPolyLine,
fbPolySegment,
fbPolyRectangle,
fbPolyArc,
miFillPolygon,
rlPolyFillRect,
fbPolyFillArc,
miPolyText8,
miPolyText16,
miImageText8,
miImageText16,
rlImageGlyphBlt,
fbPolyGlyphBlt,
fbPushPixels
#ifdef NEED_LINEHELPER
,NULL
#endif
};
/*
* Screen function to create a graphics context
*/
static Bool
rlCreateGC(GCPtr pGC)
{
ScreenPtr pScreen = pGC->pScreen;
rlAccelScreenRec *s = RLACCELREC(pScreen);
Bool result;
// Unwrap and call
pScreen->CreateGC = s->CreateGC;
result = s->CreateGC(pGC);
// Accelerated GC ops replace some fb GC ops
pGC->ops = &rlAccelOps;
// Rewrap
s->CreateGC = pScreen->CreateGC;
pScreen->CreateGC = rlCreateGC;
return result;
}
/*
* Clean up when closing a screen on server reset
*/
static Bool
rlCloseScreen (int iScreen, ScreenPtr pScreen)
{
rlAccelScreenRec *s = RLACCELREC(pScreen);
Bool result;
// Unwrap
pScreen->CloseScreen = s->CloseScreen;
result = pScreen->CloseScreen(iScreen, pScreen);
xfree(s);
return result;
}
/*
* RootlessAccelInit
* Called by the rootless implementation to initialize accelerated
* rootless drawing.
*/
Bool
RootlessAccelInit(ScreenPtr pScreen)
{
static unsigned long rlAccelGeneration = 0;
rlAccelScreenRec *s;
if (rlAccelGeneration != serverGeneration) {
rlAccelScreenPrivateIndex = AllocateScreenPrivateIndex();
if (rlAccelScreenPrivateIndex == -1) return FALSE;
rlAccelGeneration = serverGeneration;
}
s = xalloc(sizeof(rlAccelScreenRec));
if (!s) return FALSE;
RLACCELREC(pScreen) = s;
// Wrap the screen functions we need
s->CreateGC = pScreen->CreateGC;
pScreen->CreateGC = rlCreateGC;
s->CloseScreen = pScreen->CloseScreen;
pScreen->CloseScreen = rlCloseScreen;
return TRUE;
}
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