xserver-multidpi/miext/cw/cw.c
Eric Anholt 971755765d Bug #1101: Fix PaintWindow in the pixmap case when the window's origin is
not at the backing pixmap's origin. Resulted in incorrect rendering in
    at least aisleriot, fluxbox, and KDE apps, and probably many more.
    While here, move the ParentRelative loop above the drawable grab -- may
    improve correctness with ParentRelative background origins as well.
    Note that the border code doesn't handle ParentRelative yet.
2004-08-27 21:09:23 +00:00

686 lines
18 KiB
C

/*
* 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.
*/
/* $Header$ */
#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
int cwGCIndex;
int cwScreenIndex;
int cwWindowIndex;
#ifdef RENDER
int cwPictureIndex;
#endif
static unsigned long cwGeneration = 0;
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);
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)(pGC)->devPrivates[cwGCIndex].ptr;
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)(pGCDst)->devPrivates[cwGCIndex].ptr;
FUNC_PROLOGUE(pGCDst, pPriv);
(*pGCDst->funcs->CopyGC) (pGCSrc, mask, pGCDst);
FUNC_EPILOGUE(pGCDst, pPriv);
}
static void
cwDestroyGC(GCPtr pGC)
{
cwGCPtr pPriv = (cwGCPtr)(pGC)->devPrivates[cwGCIndex].ptr;
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)(pGC)->devPrivates[cwGCIndex].ptr;
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)(pgcDst)->devPrivates[cwGCIndex].ptr;
FUNC_PROLOGUE(pgcDst, pPriv);
(*pgcDst->funcs->CopyClip)(pgcDst, pgcSrc);
FUNC_EPILOGUE(pgcDst, pPriv);
}
static void
cwDestroyClip(GCPtr pGC)
{
cwGCPtr pPriv = (cwGCPtr)(pGC)->devPrivates[cwGCIndex].ptr;
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
cwFillRegionSolid(DrawablePtr pDrawable, RegionPtr pRegion, unsigned long pixel)
{
ScreenPtr pScreen = pDrawable->pScreen;
GCPtr pGC;
BoxPtr pBox;
int nbox, i;
ChangeGCVal v[3];
pGC = GetScratchGC(pDrawable->depth, pScreen);
v[0].val = GXcopy;
v[1].val = pixel;
v[2].val = FillSolid;
dixChangeGC(NullClient, pGC, (GCFunction | GCForeground | GCFillStyle),
NULL, v);
ValidateGC(pDrawable, pGC);
pBox = REGION_RECTS(pRegion);
nbox = REGION_NUM_RECTS(pRegion);
for (i = 0; i < nbox; i++, pBox++) {
xRectangle rect;
rect.x = pBox->x1;
rect.y = pBox->y1;
rect.width = pBox->x2 - pBox->x1;
rect.height = pBox->y2 - pBox->y1;
(*pGC->ops->PolyFillRect)(pDrawable, pGC, 1, &rect);
}
FreeScratchGC(pGC);
}
static void
cwFillRegionTiled(DrawablePtr pDrawable, RegionPtr pRegion, PixmapPtr pTile,
int x_off, int y_off)
{
ScreenPtr pScreen = pDrawable->pScreen;
GCPtr pGC;
BoxPtr pBox;
int nbox, i;
ChangeGCVal v[5];
pGC = GetScratchGC(pDrawable->depth, pScreen);
v[0].val = GXcopy;
v[1].val = FillTiled;
v[2].ptr = (pointer) pTile;
v[3].val = x_off;
v[4].val = y_off;
dixChangeGC(NullClient, pGC, (GCFunction | GCFillStyle | GCTile |
GCTileStipXOrigin | GCTileStipYOrigin), NULL, v);
ValidateGC(pDrawable, pGC);
pBox = REGION_RECTS(pRegion);
nbox = REGION_NUM_RECTS(pRegion);
for (i = 0; i < nbox; i++, pBox++) {
xRectangle rect;
rect.x = pBox->x1;
rect.y = pBox->y1;
rect.width = pBox->x2 - pBox->x1;
rect.height = pBox->y2 - pBox->y1;
(*pGC->ops->PolyFillRect)(pDrawable, pGC, 1, &rect);
}
FreeScratchGC(pGC);
}
static void
cwPaintWindowBackground(WindowPtr pWin, RegionPtr pRegion, int what)
{
ScreenPtr pScreen = pWin->drawable.pScreen;
SCREEN_PROLOGUE(pScreen, PaintWindowBackground);
if (!cwDrawableIsRedirWindow((DrawablePtr)pWin)) {
(*pScreen->PaintWindowBackground)(pWin, pRegion, what);
} else {
DrawablePtr pBackingDrawable;
int x_off, y_off, x_screen, y_screen;
while (pWin && pWin->backgroundState == ParentRelative)
pWin = pWin->parent;
pBackingDrawable = cwGetBackingDrawable((DrawablePtr)pWin, &x_off,
&y_off);
x_screen = x_off - pWin->drawable.x;
y_screen = y_off - pWin->drawable.y;
if (pWin && (pWin->backgroundState == BackgroundPixel ||
pWin->backgroundState == BackgroundPixmap))
{
REGION_TRANSLATE(pScreen, pRegion, x_screen, y_screen);
if (pWin->backgroundState == BackgroundPixel) {
cwFillRegionSolid(pBackingDrawable, pRegion,
pWin->background.pixel);
} else {
cwFillRegionTiled(pBackingDrawable, pRegion,
pWin->background.pixmap, x_off, y_off);
}
REGION_TRANSLATE(pScreen, pRegion, -x_screen, -y_screen);
}
}
SCREEN_EPILOGUE(pScreen, PaintWindowBackground, cwPaintWindowBackground);
}
static void
cwPaintWindowBorder(WindowPtr pWin, RegionPtr pRegion, int what)
{
ScreenPtr pScreen = pWin->drawable.pScreen;
SCREEN_PROLOGUE(pScreen, PaintWindowBorder);
if (!cwDrawableIsRedirWindow((DrawablePtr)pWin)) {
(*pScreen->PaintWindowBorder)(pWin, pRegion, what);
} else {
DrawablePtr pBackingDrawable;
int x_off, y_off, x_screen, y_screen;
pBackingDrawable = cwGetBackingDrawable((DrawablePtr)pWin, &x_off,
&y_off);
x_screen = x_off - pWin->drawable.x;
y_screen = y_off - pWin->drawable.y;
REGION_TRANSLATE(pScreen, pRegion, x_screen, y_screen);
if (pWin->borderIsPixel) {
cwFillRegionSolid(pBackingDrawable, pRegion, pWin->border.pixel);
} else {
cwFillRegionTiled(pBackingDrawable, pRegion, pWin->border.pixmap,
x_off, y_off);
}
REGION_TRANSLATE(pScreen, pRegion, -x_screen, -y_screen);
}
SCREEN_EPILOGUE(pScreen, PaintWindowBorder, cwPaintWindowBorder);
}
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;
if (cwGeneration != serverGeneration)
{
cwScreenIndex = AllocateScreenPrivateIndex();
if (cwScreenIndex < 0)
return;
cwGCIndex = AllocateGCPrivateIndex();
cwWindowIndex = AllocateWindowPrivateIndex();
#ifdef RENDER
cwPictureIndex = AllocatePicturePrivateIndex();
#endif
cwGeneration = serverGeneration;
}
if (!AllocateGCPrivate(pScreen, cwGCIndex, sizeof(cwGCRec)))
return;
if (!AllocateWindowPrivate(pScreen, cwWindowIndex, 0))
return;
#ifdef RENDER
if (!AllocatePicturePrivate(pScreen, cwPictureIndex, 0))
return;
#endif
pScreenPriv = (cwScreenPtr)xalloc(sizeof(cwScreenRec));
if (!pScreenPriv)
return;
pScreen->devPrivates[cwScreenIndex].ptr = (pointer)pScreenPriv;
SCREEN_EPILOGUE(pScreen, CloseScreen, cwCloseScreen);
SCREEN_EPILOGUE(pScreen, GetImage, cwGetImage);
SCREEN_EPILOGUE(pScreen, GetSpans, cwGetSpans);
SCREEN_EPILOGUE(pScreen, CreateGC, cwCreateGC);
SCREEN_EPILOGUE(pScreen, PaintWindowBackground, cwPaintWindowBackground);
SCREEN_EPILOGUE(pScreen, PaintWindowBorder, cwPaintWindowBorder);
SCREEN_EPILOGUE(pScreen, CopyWindow, cwCopyWindow);
SCREEN_EPILOGUE(pScreen, SetWindowPixmap, cwSetWindowPixmap);
SCREEN_EPILOGUE(pScreen, GetWindowPixmap, cwGetWindowPixmap);
#ifdef RENDER
if (GetPictureScreen (pScreen))
cwInitializeRender(pScreen);
#endif
}
static Bool
cwCloseScreen (int i, ScreenPtr pScreen)
{
cwScreenPtr pScreenPriv;
#ifdef RENDER
PictureScreenPtr ps = GetPictureScreenIfSet(pScreen);
#endif
pScreenPriv = (cwScreenPtr)pScreen->devPrivates[cwScreenIndex].ptr;
pScreen->CloseScreen = pScreenPriv->CloseScreen;
pScreen->GetImage = pScreenPriv->GetImage;
pScreen->GetSpans = pScreenPriv->GetSpans;
pScreen->CreateGC = pScreenPriv->CreateGC;
pScreen->PaintWindowBackground = pScreenPriv->PaintWindowBackground;
pScreen->PaintWindowBorder = pScreenPriv->PaintWindowBorder;
pScreen->CopyWindow = pScreenPriv->CopyWindow;
#ifdef RENDER
if (ps)
cwFiniRender(pScreen);
#endif
xfree((pointer)pScreenPriv);
return (*pScreen->CloseScreen)(i, pScreen);
}