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+/* $Xorg: migc.c,v 1.4 2001/02/09 02:05:21 xorgcvs Exp $ */
+/*
+
+Copyright 1993, 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.
+
+*/
+
+
+#include "scrnintstr.h"
+#include "gcstruct.h"
+#include "pixmapstr.h"
+#include "windowstr.h"
+#include "migc.h"
+
+int miGCPrivateIndex;
+
+void
+miRegisterGCPrivateIndex(gcindex)
+ int gcindex;
+{
+ miGCPrivateIndex = gcindex;
+}
+
+/* ARGSUSED */
+void
+miChangeGC(pGC, mask)
+ GCPtr pGC;
+ unsigned long mask;
+{
+ return;
+}
+
+void
+miDestroyGC(pGC)
+ GCPtr pGC;
+{
+ miPrivGC *pPriv;
+
+ pPriv = (miPrivGC *) (pGC->devPrivates[miGCPrivateIndex].ptr);
+ if (pPriv->pRotatedPixmap)
+ (*pGC->pScreen->DestroyPixmap) (pPriv->pRotatedPixmap);
+ if (pPriv->freeCompClip)
+ REGION_DESTROY(pGC->pScreen, pPriv->pCompositeClip);
+ miDestroyGCOps(pGC->ops);
+}
+
+/*
+ * create a private op array for a gc
+ */
+
+GCOpsPtr
+miCreateGCOps(prototype)
+ GCOpsPtr prototype;
+{
+ GCOpsPtr ret;
+ extern Bool Must_have_memory;
+
+ /* XXX */ Must_have_memory = TRUE;
+ ret = (GCOpsPtr) xalloc(sizeof(GCOps));
+ /* XXX */ Must_have_memory = FALSE;
+ if (!ret)
+ return 0;
+ *ret = *prototype;
+ ret->devPrivate.val = 1;
+ return ret;
+}
+
+void
+miDestroyGCOps(ops)
+ GCOpsPtr ops;
+{
+ if (ops->devPrivate.val)
+ xfree(ops);
+}
+
+
+void
+miDestroyClip(pGC)
+ GCPtr pGC;
+{
+ if (pGC->clientClipType == CT_NONE)
+ return;
+ else if (pGC->clientClipType == CT_PIXMAP)
+ {
+ (*pGC->pScreen->DestroyPixmap) ((PixmapPtr) (pGC->clientClip));
+ }
+ else
+ {
+ /*
+ * we know we'll never have a list of rectangles, since ChangeClip
+ * immediately turns them into a region
+ */
+ REGION_DESTROY(pGC->pScreen, pGC->clientClip);
+ }
+ pGC->clientClip = NULL;
+ pGC->clientClipType = CT_NONE;
+}
+
+void
+miChangeClip(pGC, type, pvalue, nrects)
+ GCPtr pGC;
+ int type;
+ pointer pvalue;
+ int nrects;
+{
+ (*pGC->funcs->DestroyClip) (pGC);
+ if (type == CT_PIXMAP)
+ {
+ /* convert the pixmap to a region */
+ pGC->clientClip = (pointer) BITMAP_TO_REGION(pGC->pScreen,
+ (PixmapPtr) pvalue);
+ (*pGC->pScreen->DestroyPixmap) (pvalue);
+ }
+ else if (type == CT_REGION)
+ {
+ /* stuff the region in the GC */
+ pGC->clientClip = pvalue;
+ }
+ else if (type != CT_NONE)
+ {
+ pGC->clientClip = (pointer) RECTS_TO_REGION(pGC->pScreen, nrects,
+ (xRectangle *) pvalue,
+ type);
+ xfree(pvalue);
+ }
+ pGC->clientClipType = (type != CT_NONE && pGC->clientClip) ? CT_REGION : CT_NONE;
+ pGC->stateChanges |= GCClipMask;
+}
+
+void
+miCopyClip(pgcDst, pgcSrc)
+ GCPtr pgcDst, pgcSrc;
+{
+ RegionPtr prgnNew;
+
+ switch (pgcSrc->clientClipType)
+ {
+ case CT_PIXMAP:
+ ((PixmapPtr) pgcSrc->clientClip)->refcnt++;
+ /* Fall through !! */
+ case CT_NONE:
+ (*pgcDst->funcs->ChangeClip) (pgcDst, (int) pgcSrc->clientClipType,
+ pgcSrc->clientClip, 0);
+ break;
+ case CT_REGION:
+ prgnNew = REGION_CREATE(pgcSrc->pScreen, NULL, 1);
+ REGION_COPY(pgcDst->pScreen, prgnNew,
+ (RegionPtr) (pgcSrc->clientClip));
+ (*pgcDst->funcs->ChangeClip) (pgcDst, CT_REGION, (pointer) prgnNew, 0);
+ break;
+ }
+}
+
+/* ARGSUSED */
+void
+miCopyGC(pGCSrc, changes, pGCDst)
+ GCPtr pGCSrc;
+ unsigned long changes;
+ GCPtr pGCDst;
+{
+ return;
+}
+
+void
+miComputeCompositeClip(pGC, pDrawable)
+ GCPtr pGC;
+ DrawablePtr pDrawable;
+{
+ ScreenPtr pScreen = pGC->pScreen;
+ miPrivGC *devPriv = (miPrivGC *) (pGC->devPrivates[miGCPrivateIndex].ptr);
+
+ if (pDrawable->type == DRAWABLE_WINDOW)
+ {
+ WindowPtr pWin = (WindowPtr) pDrawable;
+ RegionPtr pregWin;
+ Bool freeTmpClip, freeCompClip;
+
+ if (pGC->subWindowMode == IncludeInferiors)
+ {
+ pregWin = NotClippedByChildren(pWin);
+ freeTmpClip = TRUE;
+ }
+ else
+ {
+ pregWin = &pWin->clipList;
+ freeTmpClip = FALSE;
+ }
+ freeCompClip = devPriv->freeCompClip;
+
+ /*
+ * if there is no client clip, we can get by with just keeping the
+ * pointer we got, and remembering whether or not should destroy (or
+ * maybe re-use) it later. this way, we avoid unnecessary copying of
+ * regions. (this wins especially if many clients clip by children
+ * and have no client clip.)
+ */
+ if (pGC->clientClipType == CT_NONE)
+ {
+ if (freeCompClip)
+ REGION_DESTROY(pScreen, devPriv->pCompositeClip);
+ devPriv->pCompositeClip = pregWin;
+ devPriv->freeCompClip = freeTmpClip;
+ }
+ else
+ {
+ /*
+ * we need one 'real' region to put into the composite clip. if
+ * pregWin the current composite clip are real, we can get rid of
+ * one. if pregWin is real and the current composite clip isn't,
+ * use pregWin for the composite clip. if the current composite
+ * clip is real and pregWin isn't, use the current composite
+ * clip. if neither is real, create a new region.
+ */
+
+ REGION_TRANSLATE(pScreen, pGC->clientClip,
+ pDrawable->x + pGC->clipOrg.x,
+ pDrawable->y + pGC->clipOrg.y);
+
+ if (freeCompClip)
+ {
+ REGION_INTERSECT(pGC->pScreen, devPriv->pCompositeClip,
+ pregWin, pGC->clientClip);
+ if (freeTmpClip)
+ REGION_DESTROY(pScreen, pregWin);
+ }
+ else if (freeTmpClip)
+ {
+ REGION_INTERSECT(pScreen, pregWin, pregWin, pGC->clientClip);
+ devPriv->pCompositeClip = pregWin;
+ }
+ else
+ {
+ devPriv->pCompositeClip = REGION_CREATE(pScreen, NullBox, 0);
+ REGION_INTERSECT(pScreen, devPriv->pCompositeClip,
+ pregWin, pGC->clientClip);
+ }
+ devPriv->freeCompClip = TRUE;
+ REGION_TRANSLATE(pScreen, pGC->clientClip,
+ -(pDrawable->x + pGC->clipOrg.x),
+ -(pDrawable->y + pGC->clipOrg.y));
+ }
+ } /* end of composite clip for a window */
+ else
+ {
+ BoxRec pixbounds;
+
+ /* XXX should we translate by drawable.x/y here ? */
+ pixbounds.x1 = 0;
+ pixbounds.y1 = 0;
+ pixbounds.x2 = pDrawable->width;
+ pixbounds.y2 = pDrawable->height;
+
+ if (devPriv->freeCompClip)
+ {
+ REGION_RESET(pScreen, devPriv->pCompositeClip, &pixbounds);
+ }
+ else
+ {
+ devPriv->freeCompClip = TRUE;
+ devPriv->pCompositeClip = REGION_CREATE(pScreen, &pixbounds, 1);
+ }
+
+ if (pGC->clientClipType == CT_REGION)
+ {
+ REGION_TRANSLATE(pScreen, devPriv->pCompositeClip,
+ -pGC->clipOrg.x, -pGC->clipOrg.y);
+ REGION_INTERSECT(pScreen, devPriv->pCompositeClip,
+ devPriv->pCompositeClip, pGC->clientClip);
+ REGION_TRANSLATE(pScreen, devPriv->pCompositeClip,
+ pGC->clipOrg.x, pGC->clipOrg.y);
+ }
+ } /* end of composite clip for pixmap */
+} /* end miComputeCompositeClip */
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