xenocara/xserver/render/animcur.c

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/*
*
* Copyright © 2002 Keith Packard, member of The XFree86 Project, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Animated cursors for X. Not specific to Render in any way, but
* stuck there because Render has the other cool cursor extension.
* Besides, everyone has Render.
*
* Implemented as a simple layer over the core cursor code; it
* creates composite cursors out of a set of static cursors and
* delta times between each image.
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include <X11/X.h>
#include <X11/Xmd.h>
#include "servermd.h"
#include "scrnintstr.h"
#include "dixstruct.h"
#include "cursorstr.h"
#include "dixfontstr.h"
#include "opaque.h"
#include "picturestr.h"
#include "inputstr.h"
#include "xace.h"
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typedef struct _AnimCurElt {
CursorPtr pCursor; /* cursor to show */
CARD32 delay; /* in ms */
} AnimCurElt;
typedef struct _AnimCur {
int nelt; /* number of elements in the elts array */
AnimCurElt *elts; /* actually allocated right after the structure */
} AnimCurRec, *AnimCurPtr;
typedef struct _AnimScrPriv {
CloseScreenProcPtr CloseScreen;
ScreenBlockHandlerProcPtr BlockHandler;
CursorLimitsProcPtr CursorLimits;
DisplayCursorProcPtr DisplayCursor;
SetCursorPositionProcPtr SetCursorPosition;
RealizeCursorProcPtr RealizeCursor;
UnrealizeCursorProcPtr UnrealizeCursor;
RecolorCursorProcPtr RecolorCursor;
} AnimCurScreenRec, *AnimCurScreenPtr;
static unsigned char empty[4];
static CursorBits animCursorBits = {
empty, empty, 2, 1, 1, 0, 0, 1
};
static DevPrivateKeyRec AnimCurScreenPrivateKeyRec;
#define AnimCurScreenPrivateKey (&AnimCurScreenPrivateKeyRec)
#define IsAnimCur(c) ((c) && ((c)->bits == &animCursorBits))
#define GetAnimCur(c) ((AnimCurPtr) ((((char *)(c) + CURSOR_REC_SIZE))))
#define GetAnimCurScreen(s) ((AnimCurScreenPtr)dixLookupPrivate(&(s)->devPrivates, AnimCurScreenPrivateKey))
#define SetAnimCurScreen(s,p) dixSetPrivate(&(s)->devPrivates, AnimCurScreenPrivateKey, p)
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#define Wrap(as,s,elt,func) (((as)->elt = (s)->elt), (s)->elt = func)
#define Unwrap(as,s,elt) ((s)->elt = (as)->elt)
static Bool
AnimCurCloseScreen (int index, ScreenPtr pScreen)
{
AnimCurScreenPtr as = GetAnimCurScreen(pScreen);
Bool ret;
Unwrap(as, pScreen, CloseScreen);
Unwrap(as, pScreen, CursorLimits);
Unwrap(as, pScreen, DisplayCursor);
Unwrap(as, pScreen, SetCursorPosition);
Unwrap(as, pScreen, RealizeCursor);
Unwrap(as, pScreen, UnrealizeCursor);
Unwrap(as, pScreen, RecolorCursor);
SetAnimCurScreen(pScreen,0);
ret = (*pScreen->CloseScreen) (index, pScreen);
free(as);
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return ret;
}
static void
AnimCurCursorLimits (DeviceIntPtr pDev,
ScreenPtr pScreen,
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CursorPtr pCursor,
BoxPtr pHotBox,
BoxPtr pTopLeftBox)
{
AnimCurScreenPtr as = GetAnimCurScreen(pScreen);
Unwrap (as, pScreen, CursorLimits);
if (IsAnimCur(pCursor))
{
AnimCurPtr ac = GetAnimCur(pCursor);
(*pScreen->CursorLimits) (pDev, pScreen, ac->elts[0].pCursor,
pHotBox, pTopLeftBox);
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}
else
{
(*pScreen->CursorLimits) (pDev, pScreen, pCursor,
pHotBox, pTopLeftBox);
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}
Wrap (as, pScreen, CursorLimits, AnimCurCursorLimits);
}
/*
* This has to be a screen block handler instead of a generic
* block handler so that it is well ordered with respect to the DRI
* block handler responsible for releasing the hardware to DRI clients
*/
static void
AnimCurScreenBlockHandler (int screenNum,
pointer blockData,
pointer pTimeout,
pointer pReadmask)
{
ScreenPtr pScreen = screenInfo.screens[screenNum];
AnimCurScreenPtr as = GetAnimCurScreen(pScreen);
DeviceIntPtr dev;
Bool activeDevice = FALSE;
CARD32 now = 0,
soonest = ~0; /* earliest time to wakeup again */
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for (dev = inputInfo.devices; dev; dev = dev->next)
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{
if (IsPointerDevice(dev) && pScreen == dev->spriteInfo->anim.pScreen)
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{
if (!activeDevice) {
now = GetTimeInMillis ();
activeDevice = TRUE;
}
if ((INT32) (now - dev->spriteInfo->anim.time) >= 0)
{
AnimCurPtr ac = GetAnimCur(dev->spriteInfo->anim.pCursor);
int elt = (dev->spriteInfo->anim.elt + 1) % ac->nelt;
DisplayCursorProcPtr DisplayCursor;
/*
* Not a simple Unwrap/Wrap as this
* isn't called along the DisplayCursor
* wrapper chain.
*/
DisplayCursor = pScreen->DisplayCursor;
pScreen->DisplayCursor = as->DisplayCursor;
(void) (*pScreen->DisplayCursor) (dev,
pScreen,
ac->elts[elt].pCursor);
as->DisplayCursor = pScreen->DisplayCursor;
pScreen->DisplayCursor = DisplayCursor;
dev->spriteInfo->anim.elt = elt;
dev->spriteInfo->anim.time = now + ac->elts[elt].delay;
}
if (soonest > dev->spriteInfo->anim.time)
soonest = dev->spriteInfo->anim.time;
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}
}
if (activeDevice)
AdjustWaitForDelay (pTimeout, soonest - now);
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Unwrap (as, pScreen, BlockHandler);
(*pScreen->BlockHandler) (screenNum, blockData, pTimeout, pReadmask);
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if (activeDevice)
Wrap (as, pScreen, BlockHandler, AnimCurScreenBlockHandler);
else
as->BlockHandler = NULL;
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}
static Bool
AnimCurDisplayCursor (DeviceIntPtr pDev,
ScreenPtr pScreen,
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CursorPtr pCursor)
{
AnimCurScreenPtr as = GetAnimCurScreen(pScreen);
Bool ret;
Unwrap (as, pScreen, DisplayCursor);
if (IsAnimCur(pCursor))
{
if (pCursor != pDev->spriteInfo->anim.pCursor)
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{
AnimCurPtr ac = GetAnimCur(pCursor);
ret = (*pScreen->DisplayCursor)
(pDev, pScreen, ac->elts[0].pCursor);
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if (ret)
{
pDev->spriteInfo->anim.elt = 0;
pDev->spriteInfo->anim.time = GetTimeInMillis () + ac->elts[0].delay;
pDev->spriteInfo->anim.pCursor = pCursor;
pDev->spriteInfo->anim.pScreen = pScreen;
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if (!as->BlockHandler)
Wrap(as, pScreen, BlockHandler, AnimCurScreenBlockHandler);
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}
}
else
ret = TRUE;
}
else
{
pDev->spriteInfo->anim.pCursor = 0;
pDev->spriteInfo->anim.pScreen = 0;
ret = (*pScreen->DisplayCursor) (pDev, pScreen, pCursor);
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}
Wrap (as, pScreen, DisplayCursor, AnimCurDisplayCursor);
return ret;
}
static Bool
AnimCurSetCursorPosition (DeviceIntPtr pDev,
ScreenPtr pScreen,
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int x,
int y,
Bool generateEvent)
{
AnimCurScreenPtr as = GetAnimCurScreen(pScreen);
Bool ret;
Unwrap (as, pScreen, SetCursorPosition);
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if (pDev->spriteInfo->anim.pCursor) {
pDev->spriteInfo->anim.pScreen = pScreen;
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if (!as->BlockHandler)
Wrap(as, pScreen, BlockHandler, AnimCurScreenBlockHandler);
}
ret = (*pScreen->SetCursorPosition) (pDev, pScreen, x, y, generateEvent);
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Wrap (as, pScreen, SetCursorPosition, AnimCurSetCursorPosition);
return ret;
}
static Bool
AnimCurRealizeCursor (DeviceIntPtr pDev,
ScreenPtr pScreen,
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CursorPtr pCursor)
{
AnimCurScreenPtr as = GetAnimCurScreen(pScreen);
Bool ret;
Unwrap (as, pScreen, RealizeCursor);
if (IsAnimCur(pCursor))
ret = TRUE;
else
ret = (*pScreen->RealizeCursor) (pDev, pScreen, pCursor);
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Wrap (as, pScreen, RealizeCursor, AnimCurRealizeCursor);
return ret;
}
static Bool
AnimCurUnrealizeCursor (DeviceIntPtr pDev,
ScreenPtr pScreen,
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CursorPtr pCursor)
{
AnimCurScreenPtr as = GetAnimCurScreen(pScreen);
Bool ret;
Unwrap (as, pScreen, UnrealizeCursor);
if (IsAnimCur(pCursor))
{
AnimCurPtr ac = GetAnimCur(pCursor);
int i;
if (pScreen->myNum == 0)
for (i = 0; i < ac->nelt; i++)
FreeCursor (ac->elts[i].pCursor, 0);
ret = TRUE;
}
else
ret = (*pScreen->UnrealizeCursor) (pDev, pScreen, pCursor);
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Wrap (as, pScreen, UnrealizeCursor, AnimCurUnrealizeCursor);
return ret;
}
static void
AnimCurRecolorCursor (DeviceIntPtr pDev,
ScreenPtr pScreen,
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CursorPtr pCursor,
Bool displayed)
{
AnimCurScreenPtr as = GetAnimCurScreen(pScreen);
Unwrap (as, pScreen, RecolorCursor);
if (IsAnimCur(pCursor))
{
AnimCurPtr ac = GetAnimCur(pCursor);
int i;
for (i = 0; i < ac->nelt; i++)
(*pScreen->RecolorCursor) (pDev, pScreen, ac->elts[i].pCursor,
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displayed &&
pDev->spriteInfo->anim.elt == i);
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}
else
(*pScreen->RecolorCursor) (pDev, pScreen, pCursor, displayed);
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Wrap (as, pScreen, RecolorCursor, AnimCurRecolorCursor);
}
Bool
AnimCurInit (ScreenPtr pScreen)
{
AnimCurScreenPtr as;
if (!dixRegisterPrivateKey(&AnimCurScreenPrivateKeyRec, PRIVATE_SCREEN, 0))
return FALSE;
as = (AnimCurScreenPtr) malloc(sizeof (AnimCurScreenRec));
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if (!as)
return FALSE;
Wrap(as, pScreen, CloseScreen, AnimCurCloseScreen);
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as->BlockHandler = NULL;
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Wrap(as, pScreen, CursorLimits, AnimCurCursorLimits);
Wrap(as, pScreen, DisplayCursor, AnimCurDisplayCursor);
Wrap(as, pScreen, SetCursorPosition, AnimCurSetCursorPosition);
Wrap(as, pScreen, RealizeCursor, AnimCurRealizeCursor);
Wrap(as, pScreen, UnrealizeCursor, AnimCurUnrealizeCursor);
Wrap(as, pScreen, RecolorCursor, AnimCurRecolorCursor);
SetAnimCurScreen(pScreen,as);
return TRUE;
}
int
AnimCursorCreate (CursorPtr *cursors, CARD32 *deltas, int ncursor, CursorPtr *ppCursor, ClientPtr client, XID cid)
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{
CursorPtr pCursor;
int rc, i;
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AnimCurPtr ac;
for (i = 0; i < screenInfo.numScreens; i++)
if (!GetAnimCurScreen (screenInfo.screens[i]))
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return BadImplementation;
for (i = 0; i < ncursor; i++)
if (IsAnimCur (cursors[i]))
return BadMatch;
pCursor = (CursorPtr) calloc(CURSOR_REC_SIZE +
sizeof (AnimCurRec) +
ncursor * sizeof (AnimCurElt), 1);
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if (!pCursor)
return BadAlloc;
dixInitPrivates(pCursor, pCursor + 1, PRIVATE_CURSOR);
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pCursor->bits = &animCursorBits;
pCursor->refcnt = 1;
pCursor->foreRed = cursors[0]->foreRed;
pCursor->foreGreen = cursors[0]->foreGreen;
pCursor->foreBlue = cursors[0]->foreBlue;
pCursor->backRed = cursors[0]->backRed;
pCursor->backGreen = cursors[0]->backGreen;
pCursor->backBlue = cursors[0]->backBlue;
pCursor->id = cid;
/* security creation/labeling check */
rc = XaceHook(XACE_RESOURCE_ACCESS, client, cid, RT_CURSOR, pCursor,
RT_NONE, NULL, DixCreateAccess);
if (rc != Success) {
dixFiniPrivates(pCursor, PRIVATE_CURSOR);
free(pCursor);
return rc;
}
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/*
* Fill in the AnimCurRec
*/
animCursorBits.refcnt++;
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ac = GetAnimCur (pCursor);
ac->nelt = ncursor;
ac->elts = (AnimCurElt *) (ac + 1);
for (i = 0; i < ncursor; i++)
{
cursors[i]->refcnt++;
ac->elts[i].pCursor = cursors[i];
ac->elts[i].delay = deltas[i];
}
*ppCursor = pCursor;
return Success;
}