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authormarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
committermarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
commit3562e78743202e43aec8727005182a2558117eca (patch)
tree8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /xorg-server/mi/miexpose.c
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Checked in the following released items:
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Diffstat (limited to 'xorg-server/mi/miexpose.c')
-rw-r--r--xorg-server/mi/miexpose.c674
1 files changed, 674 insertions, 0 deletions
diff --git a/xorg-server/mi/miexpose.c b/xorg-server/mi/miexpose.c
new file mode 100644
index 000000000..2fba6a28c
--- /dev/null
+++ b/xorg-server/mi/miexpose.c
@@ -0,0 +1,674 @@
+/***********************************************************
+
+Copyright 1987, 1998 The Open Group
+
+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.
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+
+Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
+
+ All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its
+documentation for any purpose and without fee is hereby granted,
+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 Digital not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.
+
+DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL 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.
+
+******************************************************************/
+/*****************************************************************
+
+Copyright (c) 1991, 1997 Digital Equipment Corporation, Maynard, Massachusetts.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software.
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+DIGITAL EQUIPMENT CORPORATION BE LIABLE FOR ANY CLAIM, DAMAGES, INCLUDING,
+BUT NOT LIMITED TO CONSEQUENTIAL OR INCIDENTAL DAMAGES, OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of Digital Equipment Corporation
+shall not be used in advertising or otherwise to promote the sale, use or other
+dealings in this Software without prior written authorization from Digital
+Equipment Corporation.
+
+******************************************************************/
+
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <X11/X.h>
+#define NEED_EVENTS
+#include <X11/Xproto.h>
+#include <X11/Xprotostr.h>
+
+#include "misc.h"
+#include "regionstr.h"
+#include "scrnintstr.h"
+#include "gcstruct.h"
+#include "windowstr.h"
+#include "pixmap.h"
+#include "input.h"
+
+#include "dixstruct.h"
+#include "mi.h"
+#include <X11/Xmd.h>
+
+#include "globals.h"
+
+#ifdef PANORAMIX
+#include "panoramiX.h"
+#include "panoramiXsrv.h"
+#endif
+
+/*
+ machine-independent graphics exposure code. any device that uses
+the region package can call this.
+*/
+
+#ifndef RECTLIMIT
+#define RECTLIMIT 25 /* pick a number, any number > 8 */
+#endif
+
+/* miHandleExposures
+ generate a region for exposures for areas that were copied from obscured or
+non-existent areas to non-obscured areas of the destination. Paint the
+background for the region, if the destination is a window.
+
+NOTE:
+ this should generally be called, even if graphicsExposures is false,
+because this is where bits get recovered from backing store.
+
+NOTE:
+ added argument 'plane' is used to indicate how exposures from backing
+store should be accomplished. If plane is 0 (i.e. no bit plane), CopyArea
+should be used, else a CopyPlane of the indicated plane will be used. The
+exposing is done by the backing store's GraphicsExpose function, of course.
+
+*/
+
+_X_EXPORT RegionPtr
+miHandleExposures(pSrcDrawable, pDstDrawable,
+ pGC, srcx, srcy, width, height, dstx, dsty, plane)
+ DrawablePtr pSrcDrawable;
+ DrawablePtr pDstDrawable;
+ GCPtr pGC;
+ int srcx, srcy;
+ int width, height;
+ int dstx, dsty;
+ unsigned long plane;
+{
+ ScreenPtr pscr;
+ RegionPtr prgnSrcClip; /* drawable-relative source clip */
+ RegionRec rgnSrcRec;
+ RegionPtr prgnDstClip; /* drawable-relative dest clip */
+ RegionRec rgnDstRec;
+ BoxRec srcBox; /* unclipped source */
+ RegionRec rgnExposed; /* exposed region, calculated source-
+ relative, made dst relative to
+ intersect with visible parts of
+ dest and send events to client,
+ and then screen relative to paint
+ the window background
+ */
+ WindowPtr pSrcWin;
+ BoxRec expBox;
+ Bool extents;
+
+ /* This prevents warning about pscr not being used. */
+ pGC->pScreen = pscr = pGC->pScreen;
+
+ /* avoid work if we can */
+ if (!pGC->graphicsExposures &&
+ (pDstDrawable->type == DRAWABLE_PIXMAP) &&
+ ((pSrcDrawable->type == DRAWABLE_PIXMAP) ||
+ (((WindowPtr)pSrcDrawable)->backStorage == NULL)))
+ return NULL;
+
+ srcBox.x1 = srcx;
+ srcBox.y1 = srcy;
+ srcBox.x2 = srcx+width;
+ srcBox.y2 = srcy+height;
+
+ if (pSrcDrawable->type != DRAWABLE_PIXMAP)
+ {
+ BoxRec TsrcBox;
+
+ TsrcBox.x1 = srcx + pSrcDrawable->x;
+ TsrcBox.y1 = srcy + pSrcDrawable->y;
+ TsrcBox.x2 = TsrcBox.x1 + width;
+ TsrcBox.y2 = TsrcBox.y1 + height;
+ pSrcWin = (WindowPtr) pSrcDrawable;
+ if (pGC->subWindowMode == IncludeInferiors)
+ {
+ prgnSrcClip = NotClippedByChildren (pSrcWin);
+ if ((RECT_IN_REGION(pscr, prgnSrcClip, &TsrcBox)) == rgnIN)
+ {
+ REGION_DESTROY(pscr, prgnSrcClip);
+ return NULL;
+ }
+ }
+ else
+ {
+ if ((RECT_IN_REGION(pscr, &pSrcWin->clipList, &TsrcBox)) == rgnIN)
+ return NULL;
+ prgnSrcClip = &rgnSrcRec;
+ REGION_NULL(pscr, prgnSrcClip);
+ REGION_COPY(pscr, prgnSrcClip, &pSrcWin->clipList);
+ }
+ REGION_TRANSLATE(pscr, prgnSrcClip,
+ -pSrcDrawable->x, -pSrcDrawable->y);
+ }
+ else
+ {
+ BoxRec box;
+
+ if ((srcBox.x1 >= 0) && (srcBox.y1 >= 0) &&
+ (srcBox.x2 <= pSrcDrawable->width) &&
+ (srcBox.y2 <= pSrcDrawable->height))
+ return NULL;
+
+ box.x1 = 0;
+ box.y1 = 0;
+ box.x2 = pSrcDrawable->width;
+ box.y2 = pSrcDrawable->height;
+ prgnSrcClip = &rgnSrcRec;
+ REGION_INIT(pscr, prgnSrcClip, &box, 1);
+ pSrcWin = (WindowPtr)NULL;
+ }
+
+ if (pDstDrawable == pSrcDrawable)
+ {
+ prgnDstClip = prgnSrcClip;
+ }
+ else if (pDstDrawable->type != DRAWABLE_PIXMAP)
+ {
+ if (pGC->subWindowMode == IncludeInferiors)
+ {
+ prgnDstClip = NotClippedByChildren((WindowPtr)pDstDrawable);
+ }
+ else
+ {
+ prgnDstClip = &rgnDstRec;
+ REGION_NULL(pscr, prgnDstClip);
+ REGION_COPY(pscr, prgnDstClip,
+ &((WindowPtr)pDstDrawable)->clipList);
+ }
+ REGION_TRANSLATE(pscr, prgnDstClip,
+ -pDstDrawable->x, -pDstDrawable->y);
+ }
+ else
+ {
+ BoxRec box;
+
+ box.x1 = 0;
+ box.y1 = 0;
+ box.x2 = pDstDrawable->width;
+ box.y2 = pDstDrawable->height;
+ prgnDstClip = &rgnDstRec;
+ REGION_INIT(pscr, prgnDstClip, &box, 1);
+ }
+
+ /* drawable-relative source region */
+ REGION_INIT(pscr, &rgnExposed, &srcBox, 1);
+
+ /* now get the hidden parts of the source box*/
+ REGION_SUBTRACT(pscr, &rgnExposed, &rgnExposed, prgnSrcClip);
+
+ /* move them over the destination */
+ REGION_TRANSLATE(pscr, &rgnExposed, dstx-srcx, dsty-srcy);
+
+ /* intersect with visible areas of dest */
+ REGION_INTERSECT(pscr, &rgnExposed, &rgnExposed, prgnDstClip);
+
+ /*
+ * If we have LOTS of rectangles, we decide to take the extents
+ * and force an exposure on that. This should require much less
+ * work overall, on both client and server. This is cheating, but
+ * isn't prohibited by the protocol ("spontaneous combustion" :-)
+ * for windows.
+ */
+ extents = pGC->graphicsExposures &&
+ (REGION_NUM_RECTS(&rgnExposed) > RECTLIMIT) &&
+ (pDstDrawable->type != DRAWABLE_PIXMAP);
+#ifdef SHAPE
+ if (pSrcWin)
+ {
+ RegionPtr region;
+ if (!(region = wClipShape (pSrcWin)))
+ region = wBoundingShape (pSrcWin);
+ /*
+ * If you try to CopyArea the extents of a shaped window, compacting the
+ * exposed region will undo all our work!
+ */
+ if (extents && pSrcWin && region &&
+ (RECT_IN_REGION(pscr, region, &srcBox) != rgnIN))
+ extents = FALSE;
+ }
+#endif
+ if (extents)
+ {
+ expBox = *REGION_EXTENTS(pscr, &rgnExposed);
+ REGION_RESET(pscr, &rgnExposed, &expBox);
+ }
+ if ((pDstDrawable->type != DRAWABLE_PIXMAP) &&
+ (((WindowPtr)pDstDrawable)->backgroundState != None))
+ {
+ WindowPtr pWin = (WindowPtr)pDstDrawable;
+
+ /* make the exposed area screen-relative */
+ REGION_TRANSLATE(pscr, &rgnExposed,
+ pDstDrawable->x, pDstDrawable->y);
+
+ if (extents)
+ {
+ /* PaintWindowBackground doesn't clip, so we have to */
+ REGION_INTERSECT(pscr, &rgnExposed, &rgnExposed, &pWin->clipList);
+ }
+ miPaintWindow((WindowPtr)pDstDrawable, &rgnExposed, PW_BACKGROUND);
+
+ if (extents)
+ {
+ REGION_RESET(pscr, &rgnExposed, &expBox);
+ }
+ else
+ REGION_TRANSLATE(pscr, &rgnExposed,
+ -pDstDrawable->x, -pDstDrawable->y);
+ }
+ if (prgnDstClip == &rgnDstRec)
+ {
+ REGION_UNINIT(pscr, prgnDstClip);
+ }
+ else if (prgnDstClip != prgnSrcClip)
+ {
+ REGION_DESTROY(pscr, prgnDstClip);
+ }
+
+ if (prgnSrcClip == &rgnSrcRec)
+ {
+ REGION_UNINIT(pscr, prgnSrcClip);
+ }
+ else
+ {
+ REGION_DESTROY(pscr, prgnSrcClip);
+ }
+
+ if (pGC->graphicsExposures)
+ {
+ /* don't look */
+ RegionPtr exposed = REGION_CREATE(pscr, NullBox, 0);
+ *exposed = rgnExposed;
+ return exposed;
+ }
+ else
+ {
+ REGION_UNINIT(pscr, &rgnExposed);
+ return NULL;
+ }
+}
+
+/* send GraphicsExpose events, or a NoExpose event, based on the region */
+
+_X_EXPORT void
+miSendGraphicsExpose (client, pRgn, drawable, major, minor)
+ ClientPtr client;
+ RegionPtr pRgn;
+ XID drawable;
+ int major;
+ int minor;
+{
+ if (pRgn && !REGION_NIL(pRgn))
+ {
+ xEvent *pEvent;
+ xEvent *pe;
+ BoxPtr pBox;
+ int i;
+ int numRects;
+
+ numRects = REGION_NUM_RECTS(pRgn);
+ pBox = REGION_RECTS(pRgn);
+ if(!(pEvent = (xEvent *)xalloc(numRects * sizeof(xEvent))))
+ return;
+ pe = pEvent;
+
+ for (i=1; i<=numRects; i++, pe++, pBox++)
+ {
+ pe->u.u.type = GraphicsExpose;
+ pe->u.graphicsExposure.drawable = drawable;
+ pe->u.graphicsExposure.x = pBox->x1;
+ pe->u.graphicsExposure.y = pBox->y1;
+ pe->u.graphicsExposure.width = pBox->x2 - pBox->x1;
+ pe->u.graphicsExposure.height = pBox->y2 - pBox->y1;
+ pe->u.graphicsExposure.count = numRects - i;
+ pe->u.graphicsExposure.majorEvent = major;
+ pe->u.graphicsExposure.minorEvent = minor;
+ }
+ TryClientEvents(client, pEvent, numRects,
+ (Mask)0, NoEventMask, NullGrab);
+ xfree(pEvent);
+ }
+ else
+ {
+ xEvent event;
+ event.u.u.type = NoExpose;
+ event.u.noExposure.drawable = drawable;
+ event.u.noExposure.majorEvent = major;
+ event.u.noExposure.minorEvent = minor;
+ TryClientEvents(client, &event, 1,
+ (Mask)0, NoEventMask, NullGrab);
+ }
+}
+
+
+void
+miSendExposures(pWin, pRgn, dx, dy)
+ WindowPtr pWin;
+ RegionPtr pRgn;
+ int dx, dy;
+{
+ BoxPtr pBox;
+ int numRects;
+ xEvent *pEvent, *pe;
+ int i;
+
+ pBox = REGION_RECTS(pRgn);
+ numRects = REGION_NUM_RECTS(pRgn);
+ if(!(pEvent = (xEvent *) xalloc(numRects * sizeof(xEvent))))
+ return;
+
+ for (i=numRects, pe = pEvent; --i >= 0; pe++, pBox++)
+ {
+ pe->u.u.type = Expose;
+ pe->u.expose.window = pWin->drawable.id;
+ pe->u.expose.x = pBox->x1 - dx;
+ pe->u.expose.y = pBox->y1 - dy;
+ pe->u.expose.width = pBox->x2 - pBox->x1;
+ pe->u.expose.height = pBox->y2 - pBox->y1;
+ pe->u.expose.count = i;
+ }
+
+#ifdef PANORAMIX
+ if(!noPanoramiXExtension) {
+ int scrnum = pWin->drawable.pScreen->myNum;
+ int x = 0, y = 0;
+ XID realWin = 0;
+
+ if(!pWin->parent) {
+ x = panoramiXdataPtr[scrnum].x;
+ y = panoramiXdataPtr[scrnum].y;
+ pWin = WindowTable[0];
+ realWin = pWin->drawable.id;
+ } else if (scrnum) {
+ PanoramiXRes *win;
+ win = PanoramiXFindIDByScrnum(XRT_WINDOW,
+ pWin->drawable.id, scrnum);
+ if(!win) {
+ xfree(pEvent);
+ return;
+ }
+ realWin = win->info[0].id;
+ pWin = LookupIDByType(realWin, RT_WINDOW);
+ }
+ if(x || y || scrnum)
+ for (i = 0; i < numRects; i++) {
+ pEvent[i].u.expose.window = realWin;
+ pEvent[i].u.expose.x += x;
+ pEvent[i].u.expose.y += y;
+ }
+ }
+#endif
+
+ DeliverEvents(pWin, pEvent, numRects, NullWindow);
+
+ xfree(pEvent);
+}
+
+_X_EXPORT void
+miWindowExposures(pWin, prgn, other_exposed)
+ WindowPtr pWin;
+ RegionPtr prgn, other_exposed;
+{
+ RegionPtr exposures = prgn;
+ if ((prgn && !REGION_NIL(prgn)) ||
+ (exposures && !REGION_NIL(exposures)) || other_exposed)
+ {
+ RegionRec expRec;
+ int clientInterested;
+
+ /*
+ * Restore from backing-store FIRST.
+ */
+ clientInterested = (pWin->eventMask|wOtherEventMasks(pWin)) & ExposureMask;
+ if (other_exposed)
+ {
+ if (exposures)
+ {
+ REGION_UNION(pWin->drawable.pScreen, other_exposed,
+ exposures,
+ other_exposed);
+ if (exposures != prgn)
+ REGION_DESTROY(pWin->drawable.pScreen, exposures);
+ }
+ exposures = other_exposed;
+ }
+ if (clientInterested && exposures && (REGION_NUM_RECTS(exposures) > RECTLIMIT))
+ {
+ /*
+ * If we have LOTS of rectangles, we decide to take the extents
+ * and force an exposure on that. This should require much less
+ * work overall, on both client and server. This is cheating, but
+ * isn't prohibited by the protocol ("spontaneous combustion" :-).
+ */
+ BoxRec box;
+
+ box = *REGION_EXTENTS( pWin->drawable.pScreen, exposures);
+ if (exposures == prgn) {
+ exposures = &expRec;
+ REGION_INIT( pWin->drawable.pScreen, exposures, &box, 1);
+ REGION_RESET( pWin->drawable.pScreen, prgn, &box);
+ } else {
+ REGION_RESET( pWin->drawable.pScreen, exposures, &box);
+ REGION_UNION( pWin->drawable.pScreen, prgn, prgn, exposures);
+ }
+ /* PaintWindowBackground doesn't clip, so we have to */
+ REGION_INTERSECT( pWin->drawable.pScreen, prgn, prgn, &pWin->clipList);
+ }
+ if (prgn && !REGION_NIL(prgn))
+ miPaintWindow(pWin, prgn, PW_BACKGROUND);
+ if (clientInterested && exposures && !REGION_NIL(exposures))
+ miSendExposures(pWin, exposures,
+ pWin->drawable.x, pWin->drawable.y);
+ if (exposures == &expRec)
+ {
+ REGION_UNINIT( pWin->drawable.pScreen, exposures);
+ }
+ else if (exposures && exposures != prgn && exposures != other_exposed)
+ REGION_DESTROY( pWin->drawable.pScreen, exposures);
+ if (prgn)
+ REGION_EMPTY( pWin->drawable.pScreen, prgn);
+ }
+ else if (exposures && exposures != prgn)
+ REGION_DESTROY( pWin->drawable.pScreen, exposures);
+}
+
+_X_EXPORT void
+miPaintWindow(WindowPtr pWin, RegionPtr prgn, int what)
+{
+ ScreenPtr pScreen = pWin->drawable.pScreen;
+ ChangeGCVal gcval[5];
+ BITS32 gcmask;
+ GCPtr pGC;
+ int i;
+ BoxPtr pbox;
+ xRectangle *prect;
+ int numRects;
+ /*
+ * Distance from screen to destination drawable, use this
+ * to adjust rendering coordinates which come in in screen space
+ */
+ int draw_x_off, draw_y_off;
+ /*
+ * Tile offset for drawing; these need to align the tile
+ * to the appropriate window origin
+ */
+ int tile_x_off, tile_y_off;
+ PixUnion fill;
+ Bool solid = TRUE;
+ DrawablePtr drawable = &pWin->drawable;
+
+ if (what == PW_BACKGROUND)
+ {
+ while (pWin->backgroundState == ParentRelative)
+ pWin = pWin->parent;
+
+ draw_x_off = drawable->x;
+ draw_y_off = drawable->y;
+
+ tile_x_off = pWin->drawable.x - draw_x_off;
+ tile_y_off = pWin->drawable.y - draw_y_off;
+ fill = pWin->background;
+ switch (pWin->backgroundState) {
+ case None:
+ return;
+ case BackgroundPixmap:
+ solid = FALSE;
+ break;
+ }
+ }
+ else
+ {
+ PixmapPtr pixmap;
+
+ tile_x_off = drawable->x;
+ tile_y_off = drawable->y;
+
+ /* servers without pixmaps draw their own borders */
+ if (!pScreen->GetWindowPixmap)
+ return;
+ pixmap = (*pScreen->GetWindowPixmap) ((WindowPtr) drawable);
+ drawable = &pixmap->drawable;
+#ifdef COMPOSITE
+ draw_x_off = pixmap->screen_x;
+ draw_y_off = pixmap->screen_y;
+ tile_x_off -= draw_x_off;
+ tile_y_off -= draw_y_off;
+#else
+ draw_x_off = 0;
+ draw_y_off = 0;
+#endif
+ fill = pWin->border;
+ solid = pWin->borderIsPixel;
+ }
+
+ gcval[0].val = GXcopy;
+ gcmask = GCFunction;
+
+ if (solid)
+ {
+ gcval[1].val = fill.pixel;
+ gcval[2].val = FillSolid;
+ gcmask |= GCForeground | GCFillStyle;
+ }
+ else
+ {
+ gcval[1].val = FillTiled;
+ gcval[2].ptr = (pointer)fill.pixmap;
+ gcval[3].val = tile_x_off;
+ gcval[4].val = tile_y_off;
+ gcmask |= GCFillStyle | GCTile | GCTileStipXOrigin | GCTileStipYOrigin;
+ }
+
+ prect = (xRectangle *)xalloc(REGION_NUM_RECTS(prgn) *
+ sizeof(xRectangle));
+ if (!prect)
+ return;
+
+ pGC = GetScratchGC(drawable->depth, drawable->pScreen);
+ if (!pGC)
+ {
+ xfree(prect);
+ return;
+ }
+
+ dixChangeGC (NullClient, pGC, gcmask, NULL, gcval);
+ ValidateGC (drawable, pGC);
+
+ numRects = REGION_NUM_RECTS(prgn);
+ pbox = REGION_RECTS(prgn);
+ for (i= numRects; --i >= 0; pbox++, prect++)
+ {
+ prect->x = pbox->x1 - draw_x_off;
+ prect->y = pbox->y1 - draw_y_off;
+ prect->width = pbox->x2 - pbox->x1;
+ prect->height = pbox->y2 - pbox->y1;
+ }
+ prect -= numRects;
+ (*pGC->ops->PolyFillRect)(drawable, pGC, numRects, prect);
+ xfree(prect);
+
+ FreeScratchGC(pGC);
+}
+
+
+/* MICLEARDRAWABLE -- sets the entire drawable to the background color of
+ * the GC. Useful when we have a scratch drawable and need to initialize
+ * it. */
+_X_EXPORT void
+miClearDrawable(pDraw, pGC)
+ DrawablePtr pDraw;
+ GCPtr pGC;
+{
+ XID fg = pGC->fgPixel;
+ XID bg = pGC->bgPixel;
+ xRectangle rect;
+
+ rect.x = 0;
+ rect.y = 0;
+ rect.width = pDraw->width;
+ rect.height = pDraw->height;
+ DoChangeGC(pGC, GCForeground, &bg, 0);
+ ValidateGC(pDraw, pGC);
+ (*pGC->ops->PolyFillRect)(pDraw, pGC, 1, &rect);
+ DoChangeGC(pGC, GCForeground, &fg, 0);
+ ValidateGC(pDraw, pGC);
+}