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