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/*
* Copyright © 2004 Eric Anholt
*
* 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 Eric Anholt not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Eric Anholt makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* ERIC ANHOLT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL ERIC ANHOLT 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 <string.h>
#include "gcstruct.h"
#include "windowstr.h"
#include "cw.h"
#define CW_DEBUG 1
#if CW_DEBUG
#define CW_ASSERT(x) do { \
if (!(x)) { \
ErrorF("composite wrapper: assertion failed at %s:%d\n", __FUNC__, \
__LINE__); \
} \
} while (0)
#else
#define CW_ASSERT(x) do {} while (0)
#endif
static int cwGCKeyIndex;
DevPrivateKey cwGCKey = &cwGCKeyIndex;
static int cwScreenKeyIndex;
DevPrivateKey cwScreenKey = &cwScreenKeyIndex;
static int cwWindowKeyIndex;
DevPrivateKey cwWindowKey = &cwWindowKeyIndex;
#ifdef RENDER
static int cwPictureKeyIndex;
DevPrivateKey cwPictureKey = &cwPictureKeyIndex;
#endif
extern GCOps cwGCOps;
static Bool
cwCloseScreen (int i, ScreenPtr pScreen);
static void
cwValidateGC(GCPtr pGC, unsigned long stateChanges, DrawablePtr pDrawable);
static void
cwChangeGC(GCPtr pGC, unsigned long mask);
static void
cwCopyGC(GCPtr pGCSrc, unsigned long mask, GCPtr pGCDst);
static void
cwDestroyGC(GCPtr pGC);
static void
cwChangeClip(GCPtr pGC, int type, pointer pvalue, int nrects);
static void
cwCopyClip(GCPtr pgcDst, GCPtr pgcSrc);
static void
cwDestroyClip(GCPtr pGC);
GCFuncs cwGCFuncs = {
cwValidateGC,
cwChangeGC,
cwCopyGC,
cwDestroyGC,
cwChangeClip,
cwDestroyClip,
cwCopyClip,
};
/* Find the real drawable to draw to, and provide offsets that will translate
* window coordinates to backing pixmap coordinates.
*/
DrawablePtr
cwGetBackingDrawable(DrawablePtr pDrawable, int *x_off, int *y_off)
{
PixmapPtr pPixmap;
if (pDrawable->type == DRAWABLE_WINDOW &&
(pPixmap = getCwPixmap ((WindowPtr) pDrawable)))
{
*x_off = pDrawable->x - pPixmap->screen_x;
*y_off = pDrawable->y - pPixmap->screen_y;
return &pPixmap->drawable;
} else {
*x_off = *y_off = 0;
return pDrawable;
}
}
#define FUNC_PROLOGUE(pGC, pPriv) do { \
(pGC)->funcs = (pPriv)->wrapFuncs; \
(pGC)->ops = (pPriv)->wrapOps; \
} while (0)
#define FUNC_EPILOGUE(pGC, pPriv) do { \
(pPriv)->wrapFuncs = (pGC)->funcs; \
(pPriv)->wrapOps = (pGC)->ops; \
(pGC)->funcs = &cwGCFuncs; \
(pGC)->ops = &cwGCOps; \
} while (0)
static Bool
cwCreateBackingGC(GCPtr pGC, DrawablePtr pDrawable)
{
cwGCRec *pPriv = getCwGC(pGC);
int status, x_off, y_off;
XID noexpose = xFalse;
DrawablePtr pBackingDrawable;
pBackingDrawable = cwGetBackingDrawable(pDrawable, &x_off, &y_off);
pPriv->pBackingGC = CreateGC(pBackingDrawable, GCGraphicsExposures,
&noexpose, &status, (XID)0, serverClient);
if (status != Success)
return FALSE;
pPriv->serialNumber = 0;
pPriv->stateChanges = (1 << (GCLastBit + 1)) - 1;
return TRUE;
}
static void
cwDestroyBackingGC(GCPtr pGC)
{
cwGCPtr pPriv;
pPriv = (cwGCPtr) getCwGC (pGC);
if (pPriv->pBackingGC) {
FreeGC(pPriv->pBackingGC, (XID)0);
pPriv->pBackingGC = NULL;
}
}
static void
cwValidateGC(GCPtr pGC, unsigned long stateChanges, DrawablePtr pDrawable)
{
GCPtr pBackingGC;
cwGCPtr pPriv;
DrawablePtr pBackingDrawable;
int x_off, y_off;
pPriv = (cwGCPtr) getCwGC (pGC);
FUNC_PROLOGUE(pGC, pPriv);
/*
* Must call ValidateGC to ensure pGC->pCompositeClip is valid
*/
(*pGC->funcs->ValidateGC)(pGC, stateChanges, pDrawable);
if (!cwDrawableIsRedirWindow(pDrawable)) {
cwDestroyBackingGC(pGC);
FUNC_EPILOGUE(pGC, pPriv);
return;
} else {
if (!pPriv->pBackingGC && !cwCreateBackingGC(pGC, pDrawable)) {
FUNC_EPILOGUE(pGC, pPriv);
return;
}
}
pBackingGC = pPriv->pBackingGC;
pBackingDrawable = cwGetBackingDrawable(pDrawable, &x_off, &y_off);
pPriv->stateChanges |= stateChanges;
/*
* Copy the composite clip into the backing GC if either
* the drawable clip list has changed or the client has changed
* the client clip data
*/
if (pDrawable->serialNumber != pPriv->serialNumber ||
(pPriv->stateChanges & (GCClipXOrigin|GCClipYOrigin|GCClipMask)))
{
XID vals[2];
RegionPtr pCompositeClip;
pCompositeClip = REGION_CREATE (pScreen, NULL, 0);
REGION_COPY (pScreen, pCompositeClip, pGC->pCompositeClip);
/* Either the drawable has changed, or the clip list in the drawable has
* changed. Copy the new clip list over and set the new translated
* offset for it.
*/
(*pBackingGC->funcs->ChangeClip) (pBackingGC, CT_REGION,
(pointer) pCompositeClip, 0);
vals[0] = x_off - pDrawable->x;
vals[1] = y_off - pDrawable->y;
dixChangeGC(NullClient, pBackingGC,
(GCClipXOrigin | GCClipYOrigin), vals, NULL);
pPriv->serialNumber = pDrawable->serialNumber;
/*
* Mask off any client clip changes to make sure
* the clip list set above remains in effect
*/
pPriv->stateChanges &= ~(GCClipXOrigin|GCClipYOrigin|GCClipMask);
}
if (pPriv->stateChanges) {
CopyGC(pGC, pBackingGC, pPriv->stateChanges);
pPriv->stateChanges = 0;
}
if ((pGC->patOrg.x + x_off) != pBackingGC->patOrg.x ||
(pGC->patOrg.y + y_off) != pBackingGC->patOrg.y)
{
XID vals[2];
vals[0] = pGC->patOrg.x + x_off;
vals[1] = pGC->patOrg.y + y_off;
dixChangeGC(NullClient, pBackingGC,
(GCTileStipXOrigin | GCTileStipYOrigin), vals, NULL);
}
ValidateGC(pBackingDrawable, pBackingGC);
FUNC_EPILOGUE(pGC, pPriv);
}
static void
cwChangeGC(GCPtr pGC, unsigned long mask)
{
cwGCPtr pPriv = (cwGCPtr)dixLookupPrivate(&pGC->devPrivates, cwGCKey);
FUNC_PROLOGUE(pGC, pPriv);
(*pGC->funcs->ChangeGC) (pGC, mask);
FUNC_EPILOGUE(pGC, pPriv);
}
static void
cwCopyGC(GCPtr pGCSrc, unsigned long mask, GCPtr pGCDst)
{
cwGCPtr pPriv = (cwGCPtr)dixLookupPrivate(&pGCDst->devPrivates, cwGCKey);
FUNC_PROLOGUE(pGCDst, pPriv);
(*pGCDst->funcs->CopyGC) (pGCSrc, mask, pGCDst);
FUNC_EPILOGUE(pGCDst, pPriv);
}
static void
cwDestroyGC(GCPtr pGC)
{
cwGCPtr pPriv = (cwGCPtr)dixLookupPrivate(&pGC->devPrivates, cwGCKey);
FUNC_PROLOGUE(pGC, pPriv);
cwDestroyBackingGC(pGC);
(*pGC->funcs->DestroyGC) (pGC);
/* leave it unwrapped */
}
static void
cwChangeClip(GCPtr pGC, int type, pointer pvalue, int nrects)
{
cwGCPtr pPriv = (cwGCPtr)dixLookupPrivate(&pGC->devPrivates, cwGCKey);
FUNC_PROLOGUE(pGC, pPriv);
(*pGC->funcs->ChangeClip)(pGC, type, pvalue, nrects);
FUNC_EPILOGUE(pGC, pPriv);
}
static void
cwCopyClip(GCPtr pgcDst, GCPtr pgcSrc)
{
cwGCPtr pPriv = (cwGCPtr)dixLookupPrivate(&pgcDst->devPrivates, cwGCKey);
FUNC_PROLOGUE(pgcDst, pPriv);
(*pgcDst->funcs->CopyClip)(pgcDst, pgcSrc);
FUNC_EPILOGUE(pgcDst, pPriv);
}
static void
cwDestroyClip(GCPtr pGC)
{
cwGCPtr pPriv = (cwGCPtr)dixLookupPrivate(&pGC->devPrivates, cwGCKey);
FUNC_PROLOGUE(pGC, pPriv);
(*pGC->funcs->DestroyClip)(pGC);
FUNC_EPILOGUE(pGC, pPriv);
}
/*
* Screen wrappers.
*/
#define SCREEN_PROLOGUE(pScreen, field) \
((pScreen)->field = getCwScreen(pScreen)->field)
#define SCREEN_EPILOGUE(pScreen, field, wrapper) do { \
getCwScreen(pScreen)->field = (pScreen)->field; \
(pScreen)->field = (wrapper); \
} while (0)
static Bool
cwCreateGC(GCPtr pGC)
{
cwGCPtr pPriv = getCwGC(pGC);
ScreenPtr pScreen = pGC->pScreen;
Bool ret;
bzero(pPriv, sizeof(cwGCRec));
SCREEN_PROLOGUE(pScreen, CreateGC);
if ( (ret = (*pScreen->CreateGC)(pGC)) )
FUNC_EPILOGUE(pGC, pPriv);
SCREEN_EPILOGUE(pScreen, CreateGC, cwCreateGC);
return ret;
}
static void
cwGetImage(DrawablePtr pSrc, int x, int y, int w, int h, unsigned int format,
unsigned long planemask, char *pdstLine)
{
ScreenPtr pScreen = pSrc->pScreen;
DrawablePtr pBackingDrawable;
int src_off_x, src_off_y;
SCREEN_PROLOGUE(pScreen, GetImage);
pBackingDrawable = cwGetBackingDrawable(pSrc, &src_off_x, &src_off_y);
CW_OFFSET_XY_SRC(x, y);
(*pScreen->GetImage)(pBackingDrawable, x, y, w, h, format, planemask,
pdstLine);
SCREEN_EPILOGUE(pScreen, GetImage, cwGetImage);
}
static void
cwGetSpans(DrawablePtr pSrc, int wMax, DDXPointPtr ppt, int *pwidth,
int nspans, char *pdstStart)
{
ScreenPtr pScreen = pSrc->pScreen;
DrawablePtr pBackingDrawable;
int i;
int src_off_x, src_off_y;
SCREEN_PROLOGUE(pScreen, GetSpans);
pBackingDrawable = cwGetBackingDrawable(pSrc, &src_off_x, &src_off_y);
for (i = 0; i < nspans; i++)
CW_OFFSET_XY_SRC(ppt[i].x, ppt[i].y);
(*pScreen->GetSpans)(pBackingDrawable, wMax, ppt, pwidth, nspans,
pdstStart);
SCREEN_EPILOGUE(pScreen, GetSpans, cwGetSpans);
}
static void
cwCopyWindow(WindowPtr pWin, DDXPointRec ptOldOrg, RegionPtr prgnSrc)
{
ScreenPtr pScreen = pWin->drawable.pScreen;
SCREEN_PROLOGUE(pScreen, CopyWindow);
if (!cwDrawableIsRedirWindow((DrawablePtr)pWin)) {
(*pScreen->CopyWindow)(pWin, ptOldOrg, prgnSrc);
} else {
GCPtr pGC;
BoxPtr pExtents;
int x_off, y_off;
int dx, dy;
PixmapPtr pBackingPixmap;
RegionPtr pClip;
int src_x, src_y, dst_x, dst_y, w, h;
dx = ptOldOrg.x - pWin->drawable.x;
dy = ptOldOrg.y - pWin->drawable.y;
pExtents = REGION_EXTENTS(pScreen, prgnSrc);
pBackingPixmap = (PixmapPtr) cwGetBackingDrawable((DrawablePtr)pWin,
&x_off, &y_off);
src_x = pExtents->x1 - pBackingPixmap->screen_x;
src_y = pExtents->y1 - pBackingPixmap->screen_y;
w = pExtents->x2 - pExtents->x1;
h = pExtents->y2 - pExtents->y1;
dst_x = src_x - dx;
dst_y = src_y - dy;
/* Translate region (as required by API) */
REGION_TRANSLATE(pScreen, prgnSrc, -dx, -dy);
pGC = GetScratchGC(pBackingPixmap->drawable.depth, pScreen);
/*
* Copy region to GC as clip, aligning as dest clip
*/
pClip = REGION_CREATE (pScreen, NULL, 0);
REGION_INTERSECT(pScreen, pClip, &pWin->borderClip, prgnSrc);
REGION_TRANSLATE(pScreen, pClip,
-pBackingPixmap->screen_x,
-pBackingPixmap->screen_y);
(*pGC->funcs->ChangeClip) (pGC, CT_REGION, pClip, 0);
ValidateGC(&pBackingPixmap->drawable, pGC);
(*pGC->ops->CopyArea) (&pBackingPixmap->drawable,
&pBackingPixmap->drawable, pGC,
src_x, src_y, w, h, dst_x, dst_y);
(*pGC->funcs->DestroyClip) (pGC);
FreeScratchGC(pGC);
}
SCREEN_EPILOGUE(pScreen, CopyWindow, cwCopyWindow);
}
static PixmapPtr
cwGetWindowPixmap (WindowPtr pWin)
{
PixmapPtr pPixmap = getCwPixmap (pWin);
if (!pPixmap)
{
ScreenPtr pScreen = pWin->drawable.pScreen;
SCREEN_PROLOGUE(pScreen, GetWindowPixmap);
if (pScreen->GetWindowPixmap)
pPixmap = (*pScreen->GetWindowPixmap) (pWin);
SCREEN_EPILOGUE(pScreen, GetWindowPixmap, cwGetWindowPixmap);
}
return pPixmap;
}
static void
cwSetWindowPixmap (WindowPtr pWindow, PixmapPtr pPixmap)
{
ScreenPtr pScreen = pWindow->drawable.pScreen;
if (pPixmap == (*pScreen->GetScreenPixmap) (pScreen))
pPixmap = NULL;
setCwPixmap (pWindow, pPixmap);
}
/* Screen initialization/teardown */
void
miInitializeCompositeWrapper(ScreenPtr pScreen)
{
cwScreenPtr pScreenPriv;
#ifdef RENDER
Bool has_render = GetPictureScreenIfSet(pScreen) != NULL;
#endif
if (!dixRequestPrivate(cwGCKey, sizeof(cwGCRec)))
return;
pScreenPriv = xalloc(sizeof(cwScreenRec));
if (!pScreenPriv)
return;
dixSetPrivate(&pScreen->devPrivates, cwScreenKey, pScreenPriv);
SCREEN_EPILOGUE(pScreen, CloseScreen, cwCloseScreen);
SCREEN_EPILOGUE(pScreen, GetImage, cwGetImage);
SCREEN_EPILOGUE(pScreen, GetSpans, cwGetSpans);
SCREEN_EPILOGUE(pScreen, CreateGC, cwCreateGC);
SCREEN_EPILOGUE(pScreen, CopyWindow, cwCopyWindow);
SCREEN_EPILOGUE(pScreen, SetWindowPixmap, cwSetWindowPixmap);
SCREEN_EPILOGUE(pScreen, GetWindowPixmap, cwGetWindowPixmap);
#ifdef RENDER
if (has_render)
cwInitializeRender(pScreen);
#endif
}
static Bool
cwCloseScreen (int i, ScreenPtr pScreen)
{
cwScreenPtr pScreenPriv;
#ifdef RENDER
PictureScreenPtr ps = GetPictureScreenIfSet(pScreen);
#endif
pScreenPriv = (cwScreenPtr)dixLookupPrivate(&pScreen->devPrivates,
cwScreenKey);
pScreen->CloseScreen = pScreenPriv->CloseScreen;
pScreen->GetImage = pScreenPriv->GetImage;
pScreen->GetSpans = pScreenPriv->GetSpans;
pScreen->CreateGC = pScreenPriv->CreateGC;
pScreen->CopyWindow = pScreenPriv->CopyWindow;
#ifdef RENDER
if (ps)
cwFiniRender(pScreen);
#endif
xfree((pointer)pScreenPriv);
return (*pScreen->CloseScreen)(i, pScreen);
}
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