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/*
* Copyright © 2000 Keith Packard
*
* 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.
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include <stdlib.h>
#include <X11/X.h>
#include "scrnintstr.h"
#include "windowstr.h"
#include "dixfontstr.h"
#include "mi.h"
#include "regionstr.h"
#include "globals.h"
#include "gcstruct.h"
#include "shadow.h"
static DevPrivateKeyRec shadowScrPrivateKeyRec;
#define shadowScrPrivateKey (&shadowScrPrivateKeyRec)
#define shadowGetBuf(pScr) ((shadowBufPtr) \
dixLookupPrivate(&(pScr)->devPrivates, shadowScrPrivateKey))
#define shadowBuf(pScr) shadowBufPtr pBuf = shadowGetBuf(pScr)
#define wrap(priv, real, mem) {\
priv->mem = real->mem; \
real->mem = shadow##mem; \
}
#define unwrap(priv, real, mem) {\
real->mem = priv->mem; \
}
static void
shadowRedisplay(ScreenPtr pScreen)
{
shadowBuf(pScreen);
RegionPtr pRegion;
if (!pBuf || !pBuf->pDamage || !pBuf->update)
return;
pRegion = DamageRegion(pBuf->pDamage);
if (RegionNotEmpty(pRegion)) {
(*pBuf->update) (pScreen, pBuf);
DamageEmpty(pBuf->pDamage);
}
}
static void
shadowBlockHandler(ScreenPtr pScreen, void *timeout)
{
shadowBuf(pScreen);
shadowRedisplay(pScreen);
unwrap(pBuf, pScreen, BlockHandler);
pScreen->BlockHandler(pScreen, timeout);
wrap(pBuf, pScreen, BlockHandler);
}
static void
shadowGetImage(DrawablePtr pDrawable, int sx, int sy, int w, int h,
unsigned int format, unsigned long planeMask, char *pdstLine)
{
ScreenPtr pScreen = pDrawable->pScreen;
shadowBuf(pScreen);
/* Many apps use GetImage to sync with the visable frame buffer */
if (pDrawable->type == DRAWABLE_WINDOW)
shadowRedisplay(pScreen);
unwrap(pBuf, pScreen, GetImage);
pScreen->GetImage(pDrawable, sx, sy, w, h, format, planeMask, pdstLine);
wrap(pBuf, pScreen, GetImage);
}
static Bool
shadowCloseScreen(ScreenPtr pScreen)
{
shadowBuf(pScreen);
unwrap(pBuf, pScreen, GetImage);
unwrap(pBuf, pScreen, CloseScreen);
unwrap(pBuf, pScreen, BlockHandler);
shadowRemove(pScreen, pBuf->pPixmap);
DamageDestroy(pBuf->pDamage);
if (pBuf->pPixmap)
pScreen->DestroyPixmap(pBuf->pPixmap);
free(pBuf);
return pScreen->CloseScreen(pScreen);
}
Bool
shadowSetup(ScreenPtr pScreen)
{
shadowBufPtr pBuf;
if (!dixRegisterPrivateKey(&shadowScrPrivateKeyRec, PRIVATE_SCREEN, 0))
return FALSE;
if (!DamageSetup(pScreen))
return FALSE;
pBuf = malloc(sizeof(shadowBufRec));
if (!pBuf)
return FALSE;
pBuf->pDamage = DamageCreate((DamageReportFunc) NULL,
(DamageDestroyFunc) NULL,
DamageReportNone, TRUE, pScreen, pScreen);
if (!pBuf->pDamage) {
free(pBuf);
return FALSE;
}
wrap(pBuf, pScreen, CloseScreen);
wrap(pBuf, pScreen, GetImage);
wrap(pBuf, pScreen, BlockHandler);
pBuf->update = 0;
pBuf->window = 0;
pBuf->pPixmap = 0;
pBuf->closure = 0;
pBuf->randr = 0;
dixSetPrivate(&pScreen->devPrivates, shadowScrPrivateKey, pBuf);
return TRUE;
}
Bool
shadowAdd(ScreenPtr pScreen, PixmapPtr pPixmap, ShadowUpdateProc update,
ShadowWindowProc window, int randr, void *closure)
{
shadowBuf(pScreen);
/*
* Map simple rotation values to bitmasks; fortunately,
* these are all unique
*/
switch (randr) {
case 0:
randr = SHADOW_ROTATE_0;
break;
case 90:
randr = SHADOW_ROTATE_90;
break;
case 180:
randr = SHADOW_ROTATE_180;
break;
case 270:
randr = SHADOW_ROTATE_270;
break;
}
pBuf->update = update;
pBuf->window = window;
pBuf->randr = randr;
pBuf->closure = closure;
pBuf->pPixmap = pPixmap;
DamageRegister(&pPixmap->drawable, pBuf->pDamage);
return TRUE;
}
void
shadowRemove(ScreenPtr pScreen, PixmapPtr pPixmap)
{
shadowBuf(pScreen);
if (pBuf->pPixmap) {
DamageUnregister(pBuf->pDamage);
pBuf->update = 0;
pBuf->window = 0;
pBuf->randr = 0;
pBuf->closure = 0;
pBuf->pPixmap = 0;
}
}
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