aboutsummaryrefslogtreecommitdiff
path: root/xorg-server/dix/gc.c
diff options
context:
space:
mode:
Diffstat (limited to 'xorg-server/dix/gc.c')
-rw-r--r--xorg-server/dix/gc.c1259
1 files changed, 1259 insertions, 0 deletions
diff --git a/xorg-server/dix/gc.c b/xorg-server/dix/gc.c
new file mode 100644
index 000000000..83f48d4e3
--- /dev/null
+++ b/xorg-server/dix/gc.c
@@ -0,0 +1,1259 @@
+/***********************************************************
+
+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.
+
+******************************************************************/
+
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <X11/X.h>
+#include <X11/Xmd.h>
+#include <X11/Xproto.h>
+#include "misc.h"
+#include "resource.h"
+#include "gcstruct.h"
+#include "pixmapstr.h"
+#include "dixfontstr.h"
+#include "scrnintstr.h"
+#include "region.h"
+
+#include "privates.h"
+#include "dix.h"
+#include "xace.h"
+#include <assert.h>
+
+extern XID clientErrorValue;
+extern FontPtr defaultFont;
+
+static Bool CreateDefaultTile(GCPtr pGC);
+
+static unsigned char DefaultDash[2] = {4, 4};
+
+_X_EXPORT void
+ValidateGC(DrawablePtr pDraw, GC *pGC)
+{
+ (*pGC->funcs->ValidateGC) (pGC, pGC->stateChanges, pDraw);
+ pGC->stateChanges = 0;
+ pGC->serialNumber = pDraw->serialNumber;
+}
+
+
+/* dixChangeGC(client, pGC, mask, pC32, pUnion)
+ *
+ * This function was created as part of the Security extension
+ * implementation. The client performing the gc change must be passed so
+ * that access checks can be performed on any tiles, stipples, or fonts
+ * that are specified. ddxen can call this too; they should normally
+ * pass NullClient for the client since any access checking should have
+ * already been done at a higher level.
+ *
+ * Since we had to create a new function anyway, we decided to change the
+ * way the list of gc values is passed to eliminate the compiler warnings
+ * caused by the DoChangeGC interface. You can pass the values via pC32
+ * or pUnion, but not both; one of them must be NULL. If you don't need
+ * to pass any pointers, you can use either one:
+ *
+ * example calling dixChangeGC using pC32 parameter
+ *
+ * CARD32 v[2];
+ * v[0] = foreground;
+ * v[1] = background;
+ * dixChangeGC(client, pGC, GCForeground|GCBackground, v, NULL);
+ *
+ * example calling dixChangeGC using pUnion parameter;
+ * same effect as above
+ *
+ * ChangeGCVal v[2];
+ * v[0].val = foreground;
+ * v[1].val = background;
+ * dixChangeGC(client, pGC, GCForeground|GCBackground, NULL, v);
+ *
+ * However, if you need to pass a pointer to a pixmap or font, you MUST
+ * use the pUnion parameter.
+ *
+ * example calling dixChangeGC passing pointers in the value list
+ * v[1].ptr is a pointer to a pixmap
+ *
+ * ChangeGCVal v[2];
+ * v[0].val = FillTiled;
+ * v[1].ptr = pPixmap;
+ * dixChangeGC(client, pGC, GCFillStyle|GCTile, NULL, v);
+ *
+ * Note: we could have gotten by with just the pUnion parameter, but on
+ * 64 bit machines that would have forced us to copy the value list that
+ * comes in the ChangeGC request.
+ *
+ * Ideally, we'd change all the DoChangeGC calls to dixChangeGC, but this
+ * is far too many changes to consider at this time, so we've only
+ * changed the ones that caused compiler warnings. New code should use
+ * dixChangeGC.
+ *
+ * dpw
+ */
+
+#define NEXTVAL(_type, _var) { \
+ if (pC32) _var = (_type)*pC32++; \
+ else { \
+ _var = (_type)(pUnion->val); pUnion++; \
+ } \
+ }
+
+#define NEXT_PTR(_type, _var) { \
+ assert(pUnion); _var = (_type)pUnion->ptr; pUnion++; }
+
+_X_EXPORT int
+dixChangeGC(ClientPtr client, GC *pGC, BITS32 mask, CARD32 *pC32, ChangeGCValPtr pUnion)
+{
+ BITS32 index2;
+ int rc, error = 0;
+ PixmapPtr pPixmap;
+ BITS32 maskQ;
+
+ assert( (pC32 && !pUnion) || (!pC32 && pUnion) );
+ pGC->serialNumber |= GC_CHANGE_SERIAL_BIT;
+
+ maskQ = mask; /* save these for when we walk the GCque */
+ while (mask && !error)
+ {
+ index2 = (BITS32) lowbit (mask);
+ mask &= ~index2;
+ pGC->stateChanges |= index2;
+ switch (index2)
+ {
+ case GCFunction:
+ {
+ CARD8 newalu;
+ NEXTVAL(CARD8, newalu);
+ if (newalu <= GXset)
+ pGC->alu = newalu;
+ else
+ {
+ clientErrorValue = newalu;
+ error = BadValue;
+ }
+ break;
+ }
+ case GCPlaneMask:
+ NEXTVAL(unsigned long, pGC->planemask);
+ break;
+ case GCForeground:
+ NEXTVAL(unsigned long, pGC->fgPixel);
+ /*
+ * this is for CreateGC
+ */
+ if (!pGC->tileIsPixel && !pGC->tile.pixmap)
+ {
+ pGC->tileIsPixel = TRUE;
+ pGC->tile.pixel = pGC->fgPixel;
+ }
+ break;
+ case GCBackground:
+ NEXTVAL(unsigned long, pGC->bgPixel);
+ break;
+ case GCLineWidth: /* ??? line width is a CARD16 */
+ NEXTVAL(CARD16, pGC->lineWidth);
+ break;
+ case GCLineStyle:
+ {
+ unsigned int newlinestyle;
+ NEXTVAL(unsigned int, newlinestyle);
+ if (newlinestyle <= LineDoubleDash)
+ pGC->lineStyle = newlinestyle;
+ else
+ {
+ clientErrorValue = newlinestyle;
+ error = BadValue;
+ }
+ break;
+ }
+ case GCCapStyle:
+ {
+ unsigned int newcapstyle;
+ NEXTVAL(unsigned int, newcapstyle);
+ if (newcapstyle <= CapProjecting)
+ pGC->capStyle = newcapstyle;
+ else
+ {
+ clientErrorValue = newcapstyle;
+ error = BadValue;
+ }
+ break;
+ }
+ case GCJoinStyle:
+ {
+ unsigned int newjoinstyle;
+ NEXTVAL(unsigned int, newjoinstyle);
+ if (newjoinstyle <= JoinBevel)
+ pGC->joinStyle = newjoinstyle;
+ else
+ {
+ clientErrorValue = newjoinstyle;
+ error = BadValue;
+ }
+ break;
+ }
+ case GCFillStyle:
+ {
+ unsigned int newfillstyle;
+ NEXTVAL(unsigned int, newfillstyle);
+ if (newfillstyle <= FillOpaqueStippled)
+ pGC->fillStyle = newfillstyle;
+ else
+ {
+ clientErrorValue = newfillstyle;
+ error = BadValue;
+ }
+ break;
+ }
+ case GCFillRule:
+ {
+ unsigned int newfillrule;
+ NEXTVAL(unsigned int, newfillrule);
+ if (newfillrule <= WindingRule)
+ pGC->fillRule = newfillrule;
+ else
+ {
+ clientErrorValue = newfillrule;
+ error = BadValue;
+ }
+ break;
+ }
+ case GCTile:
+ {
+ XID newpix = 0;
+ if (pUnion)
+ {
+ NEXT_PTR(PixmapPtr, pPixmap);
+ rc = Success;
+ }
+ else
+ {
+ NEXTVAL(XID, newpix);
+ rc = dixLookupResource((pointer *)&pPixmap, newpix,
+ RT_PIXMAP, client, DixReadAccess);
+ }
+ if (rc == Success)
+ {
+ if ((pPixmap->drawable.depth != pGC->depth) ||
+ (pPixmap->drawable.pScreen != pGC->pScreen))
+ {
+ error = BadMatch;
+ }
+ else
+ {
+ pPixmap->refcnt++;
+ if (!pGC->tileIsPixel)
+ (* pGC->pScreen->DestroyPixmap)(pGC->tile.pixmap);
+ pGC->tileIsPixel = FALSE;
+ pGC->tile.pixmap = pPixmap;
+ }
+ }
+ else
+ {
+ clientErrorValue = newpix;
+ error = (rc == BadValue) ? BadPixmap : rc;
+ }
+ break;
+ }
+ case GCStipple:
+ {
+ XID newstipple = 0;
+ if (pUnion)
+ {
+ NEXT_PTR(PixmapPtr, pPixmap);
+ rc = Success;
+ }
+ else
+ {
+ NEXTVAL(XID, newstipple)
+ rc = dixLookupResource((pointer *)&pPixmap, newstipple,
+ RT_PIXMAP, client, DixReadAccess);
+ }
+ if (rc == Success)
+ {
+ if ((pPixmap->drawable.depth != 1) ||
+ (pPixmap->drawable.pScreen != pGC->pScreen))
+ {
+ error = BadMatch;
+ }
+ else
+ {
+ pPixmap->refcnt++;
+ if (pGC->stipple)
+ (* pGC->pScreen->DestroyPixmap)(pGC->stipple);
+ pGC->stipple = pPixmap;
+ }
+ }
+ else
+ {
+ clientErrorValue = newstipple;
+ error = (rc == BadValue) ? BadPixmap : rc;
+ }
+ break;
+ }
+ case GCTileStipXOrigin:
+ NEXTVAL(INT16, pGC->patOrg.x);
+ break;
+ case GCTileStipYOrigin:
+ NEXTVAL(INT16, pGC->patOrg.y);
+ break;
+ case GCFont:
+ {
+ FontPtr pFont;
+ XID newfont = 0;
+ if (pUnion)
+ {
+ NEXT_PTR(FontPtr, pFont);
+ rc = Success;
+ }
+ else
+ {
+ NEXTVAL(XID, newfont)
+ rc = dixLookupResource((pointer *)&pFont, newfont,
+ RT_FONT, client, DixUseAccess);
+ }
+ if (rc == Success)
+ {
+ pFont->refcnt++;
+ if (pGC->font)
+ CloseFont(pGC->font, (Font)0);
+ pGC->font = pFont;
+ }
+ else
+ {
+ clientErrorValue = newfont;
+ error = (rc == BadValue) ? BadFont : rc;
+ }
+ break;
+ }
+ case GCSubwindowMode:
+ {
+ unsigned int newclipmode;
+ NEXTVAL(unsigned int, newclipmode);
+ if (newclipmode <= IncludeInferiors)
+ pGC->subWindowMode = newclipmode;
+ else
+ {
+ clientErrorValue = newclipmode;
+ error = BadValue;
+ }
+ break;
+ }
+ case GCGraphicsExposures:
+ {
+ unsigned int newge;
+ NEXTVAL(unsigned int, newge);
+ if (newge <= xTrue)
+ pGC->graphicsExposures = newge;
+ else
+ {
+ clientErrorValue = newge;
+ error = BadValue;
+ }
+ break;
+ }
+ case GCClipXOrigin:
+ NEXTVAL(INT16, pGC->clipOrg.x);
+ break;
+ case GCClipYOrigin:
+ NEXTVAL(INT16, pGC->clipOrg.y);
+ break;
+ case GCClipMask:
+ {
+ Pixmap pid = 0;
+ int clipType = 0;
+
+ if (pUnion)
+ {
+ NEXT_PTR(PixmapPtr, pPixmap);
+ }
+ else
+ {
+ NEXTVAL(Pixmap, pid)
+ if (pid == None)
+ {
+ clipType = CT_NONE;
+ pPixmap = NullPixmap;
+ }
+ else {
+ rc = dixLookupResource((pointer *)&pPixmap, pid,
+ RT_PIXMAP, client,
+ DixReadAccess);
+ if (rc != Success) {
+ clientErrorValue = pid;
+ error = (rc == BadValue) ? BadPixmap : rc;
+ }
+ }
+ }
+
+ if (pPixmap)
+ {
+ if ((pPixmap->drawable.depth != 1) ||
+ (pPixmap->drawable.pScreen != pGC->pScreen))
+ {
+ error = BadMatch;
+ }
+ else
+ {
+ clipType = CT_PIXMAP;
+ pPixmap->refcnt++;
+ }
+ }
+ if(error == Success)
+ {
+ (*pGC->funcs->ChangeClip)(pGC, clipType,
+ (pointer)pPixmap, 0);
+ }
+ break;
+ }
+ case GCDashOffset:
+ NEXTVAL(INT16, pGC->dashOffset);
+ break;
+ case GCDashList:
+ {
+ CARD8 newdash;
+ NEXTVAL(CARD8, newdash);
+ if (newdash == 4)
+ {
+ if (pGC->dash != DefaultDash)
+ {
+ xfree(pGC->dash);
+ pGC->numInDashList = 2;
+ pGC->dash = DefaultDash;
+ }
+ }
+ else if (newdash != 0)
+ {
+ unsigned char *dash;
+
+ dash = (unsigned char *)xalloc(2 * sizeof(unsigned char));
+ if (dash)
+ {
+ if (pGC->dash != DefaultDash)
+ xfree(pGC->dash);
+ pGC->numInDashList = 2;
+ pGC->dash = dash;
+ dash[0] = newdash;
+ dash[1] = newdash;
+ }
+ else
+ error = BadAlloc;
+ }
+ else
+ {
+ clientErrorValue = newdash;
+ error = BadValue;
+ }
+ break;
+ }
+ case GCArcMode:
+ {
+ unsigned int newarcmode;
+ NEXTVAL(unsigned int, newarcmode);
+ if (newarcmode <= ArcPieSlice)
+ pGC->arcMode = newarcmode;
+ else
+ {
+ clientErrorValue = newarcmode;
+ error = BadValue;
+ }
+ break;
+ }
+ default:
+ clientErrorValue = maskQ;
+ error = BadValue;
+ break;
+ }
+ } /* end while mask && !error */
+
+ if (pGC->fillStyle == FillTiled && pGC->tileIsPixel)
+ {
+ if (!CreateDefaultTile (pGC))
+ {
+ pGC->fillStyle = FillSolid;
+ error = BadAlloc;
+ }
+ }
+ (*pGC->funcs->ChangeGC)(pGC, maskQ);
+ return error;
+}
+
+#undef NEXTVAL
+#undef NEXT_PTR
+
+/* Publically defined entry to ChangeGC. Just calls dixChangeGC and tells
+ * it that all of the entries are constants or IDs */
+_X_EXPORT int
+ChangeGC(GC *pGC, BITS32 mask, XID *pval)
+{
+ return (dixChangeGC(NullClient, pGC, mask, pval, NULL));
+}
+
+/* DoChangeGC(pGC, mask, pval, fPointer)
+ mask is a set of bits indicating which values to change.
+ pval contains an appropriate value for each mask.
+ fPointer is true if the values for tiles, stipples, fonts or clipmasks
+ are pointers instead of IDs. Note: if you are passing pointers you
+ MUST declare the array of values as type pointer! Other data types
+ may not be large enough to hold pointers on some machines. Yes,
+ this means you have to cast to (XID *) when you pass the array to
+ DoChangeGC. Similarly, if you are not passing pointers (fPointer = 0) you
+ MUST declare the array as type XID (not unsigned long!), or again the wrong
+ size data type may be used. To avoid this cruftiness, use dixChangeGC
+ above.
+
+ if there is an error, the value is marked as changed
+ anyway, which is probably wrong, but infrequent.
+
+NOTE:
+ all values sent over the protocol for ChangeGC requests are
+32 bits long
+*/
+_X_EXPORT int
+DoChangeGC(GC *pGC, BITS32 mask, XID *pval, int fPointer)
+{
+ if (fPointer)
+ /* XXX might be a problem on 64 bit big-endian servers */
+ return dixChangeGC(NullClient, pGC, mask, NULL, (ChangeGCValPtr)pval);
+ else
+ return dixChangeGC(NullClient, pGC, mask, pval, NULL);
+}
+
+
+/* CreateGC(pDrawable, mask, pval, pStatus)
+ creates a default GC for the given drawable, using mask to fill
+ in any non-default values.
+ Returns a pointer to the new GC on success, NULL otherwise.
+ returns status of non-default fields in pStatus
+BUG:
+ should check for failure to create default tile
+
+*/
+_X_EXPORT GCPtr
+CreateGC(DrawablePtr pDrawable, BITS32 mask, XID *pval, int *pStatus,
+ XID gcid, ClientPtr client)
+{
+ GCPtr pGC;
+
+ pGC = (GCPtr)xalloc(sizeof(GC));
+ if (!pGC)
+ {
+ *pStatus = BadAlloc;
+ return (GCPtr)NULL;
+ }
+
+ pGC->pScreen = pDrawable->pScreen;
+ pGC->depth = pDrawable->depth;
+ pGC->alu = GXcopy; /* dst <- src */
+ pGC->planemask = ~0;
+ pGC->serialNumber = GC_CHANGE_SERIAL_BIT;
+ pGC->funcs = 0;
+ pGC->devPrivates = NULL;
+ pGC->fgPixel = 0;
+ pGC->bgPixel = 1;
+ pGC->lineWidth = 0;
+ pGC->lineStyle = LineSolid;
+ pGC->capStyle = CapButt;
+ pGC->joinStyle = JoinMiter;
+ pGC->fillStyle = FillSolid;
+ pGC->fillRule = EvenOddRule;
+ pGC->arcMode = ArcPieSlice;
+ if (mask & GCForeground)
+ {
+ /*
+ * magic special case -- ChangeGC checks for this condition
+ * and snags the Foreground value to create a pseudo default-tile
+ */
+ pGC->tileIsPixel = FALSE;
+ pGC->tile.pixmap = NullPixmap;
+ }
+ else
+ {
+ pGC->tileIsPixel = TRUE;
+ pGC->tile.pixel = 0;
+ }
+
+ pGC->patOrg.x = 0;
+ pGC->patOrg.y = 0;
+ pGC->subWindowMode = ClipByChildren;
+ pGC->graphicsExposures = TRUE;
+ pGC->clipOrg.x = 0;
+ pGC->clipOrg.y = 0;
+ pGC->clientClipType = CT_NONE;
+ pGC->clientClip = (pointer)NULL;
+ pGC->numInDashList = 2;
+ pGC->dash = DefaultDash;
+ pGC->dashOffset = 0;
+ pGC->lastWinOrg.x = 0;
+ pGC->lastWinOrg.y = 0;
+
+ /* use the default font and stipple */
+ pGC->font = defaultFont;
+ defaultFont->refcnt++;
+ pGC->stipple = pGC->pScreen->PixmapPerDepth[0];
+ pGC->stipple->refcnt++;
+
+ /* security creation/labeling check */
+ *pStatus = XaceHook(XACE_RESOURCE_ACCESS, client, gcid, RT_GC, pGC,
+ RT_NONE, NULL, DixCreateAccess|DixSetAttrAccess);
+ if (*pStatus != Success)
+ goto out;
+
+ pGC->stateChanges = (1 << (GCLastBit+1)) - 1;
+ if (!(*pGC->pScreen->CreateGC)(pGC))
+ *pStatus = BadAlloc;
+ else if (mask)
+ *pStatus = ChangeGC(pGC, mask, pval);
+ else
+ *pStatus = Success;
+
+out:
+ if (*pStatus != Success)
+ {
+ if (!pGC->tileIsPixel && !pGC->tile.pixmap)
+ pGC->tileIsPixel = TRUE; /* undo special case */
+ FreeGC(pGC, (XID)0);
+ pGC = (GCPtr)NULL;
+ }
+
+ return (pGC);
+}
+
+static Bool
+CreateDefaultTile (GCPtr pGC)
+{
+ XID tmpval[3];
+ PixmapPtr pTile;
+ GCPtr pgcScratch;
+ xRectangle rect;
+ CARD16 w, h;
+
+ w = 1;
+ h = 1;
+ (*pGC->pScreen->QueryBestSize)(TileShape, &w, &h, pGC->pScreen);
+ pTile = (PixmapPtr)
+ (*pGC->pScreen->CreatePixmap)(pGC->pScreen,
+ w, h, pGC->depth, 0);
+ pgcScratch = GetScratchGC(pGC->depth, pGC->pScreen);
+ if (!pTile || !pgcScratch)
+ {
+ if (pTile)
+ (*pTile->drawable.pScreen->DestroyPixmap)(pTile);
+ if (pgcScratch)
+ FreeScratchGC(pgcScratch);
+ return FALSE;
+ }
+ tmpval[0] = GXcopy;
+ tmpval[1] = pGC->tile.pixel;
+ tmpval[2] = FillSolid;
+ (void)ChangeGC(pgcScratch, GCFunction | GCForeground | GCFillStyle,
+ tmpval);
+ ValidateGC((DrawablePtr)pTile, pgcScratch);
+ rect.x = 0;
+ rect.y = 0;
+ rect.width = w;
+ rect.height = h;
+ (*pgcScratch->ops->PolyFillRect)((DrawablePtr)pTile, pgcScratch, 1, &rect);
+ /* Always remember to free the scratch graphics context after use. */
+ FreeScratchGC(pgcScratch);
+
+ pGC->tileIsPixel = FALSE;
+ pGC->tile.pixmap = pTile;
+ return TRUE;
+}
+
+_X_EXPORT int
+CopyGC(GC *pgcSrc, GC *pgcDst, BITS32 mask)
+{
+ BITS32 index2;
+ BITS32 maskQ;
+ int error = 0;
+
+ if (pgcSrc == pgcDst)
+ return Success;
+ pgcDst->serialNumber |= GC_CHANGE_SERIAL_BIT;
+ pgcDst->stateChanges |= mask;
+ maskQ = mask;
+ while (mask)
+ {
+ index2 = (BITS32) lowbit (mask);
+ mask &= ~index2;
+ switch (index2)
+ {
+ case GCFunction:
+ pgcDst->alu = pgcSrc->alu;
+ break;
+ case GCPlaneMask:
+ pgcDst->planemask = pgcSrc->planemask;
+ break;
+ case GCForeground:
+ pgcDst->fgPixel = pgcSrc->fgPixel;
+ break;
+ case GCBackground:
+ pgcDst->bgPixel = pgcSrc->bgPixel;
+ break;
+ case GCLineWidth:
+ pgcDst->lineWidth = pgcSrc->lineWidth;
+ break;
+ case GCLineStyle:
+ pgcDst->lineStyle = pgcSrc->lineStyle;
+ break;
+ case GCCapStyle:
+ pgcDst->capStyle = pgcSrc->capStyle;
+ break;
+ case GCJoinStyle:
+ pgcDst->joinStyle = pgcSrc->joinStyle;
+ break;
+ case GCFillStyle:
+ pgcDst->fillStyle = pgcSrc->fillStyle;
+ break;
+ case GCFillRule:
+ pgcDst->fillRule = pgcSrc->fillRule;
+ break;
+ case GCTile:
+ {
+ if (EqualPixUnion(pgcDst->tileIsPixel,
+ pgcDst->tile,
+ pgcSrc->tileIsPixel,
+ pgcSrc->tile))
+ {
+ break;
+ }
+ if (!pgcDst->tileIsPixel)
+ (* pgcDst->pScreen->DestroyPixmap)(pgcDst->tile.pixmap);
+ pgcDst->tileIsPixel = pgcSrc->tileIsPixel;
+ pgcDst->tile = pgcSrc->tile;
+ if (!pgcDst->tileIsPixel)
+ pgcDst->tile.pixmap->refcnt++;
+ break;
+ }
+ case GCStipple:
+ {
+ if (pgcDst->stipple == pgcSrc->stipple)
+ break;
+ if (pgcDst->stipple)
+ (* pgcDst->pScreen->DestroyPixmap)(pgcDst->stipple);
+ pgcDst->stipple = pgcSrc->stipple;
+ if (pgcDst->stipple)
+ pgcDst->stipple->refcnt ++;
+ break;
+ }
+ case GCTileStipXOrigin:
+ pgcDst->patOrg.x = pgcSrc->patOrg.x;
+ break;
+ case GCTileStipYOrigin:
+ pgcDst->patOrg.y = pgcSrc->patOrg.y;
+ break;
+ case GCFont:
+ if (pgcDst->font == pgcSrc->font)
+ break;
+ if (pgcDst->font)
+ CloseFont(pgcDst->font, (Font)0);
+ if ((pgcDst->font = pgcSrc->font) != NullFont)
+ (pgcDst->font)->refcnt++;
+ break;
+ case GCSubwindowMode:
+ pgcDst->subWindowMode = pgcSrc->subWindowMode;
+ break;
+ case GCGraphicsExposures:
+ pgcDst->graphicsExposures = pgcSrc->graphicsExposures;
+ break;
+ case GCClipXOrigin:
+ pgcDst->clipOrg.x = pgcSrc->clipOrg.x;
+ break;
+ case GCClipYOrigin:
+ pgcDst->clipOrg.y = pgcSrc->clipOrg.y;
+ break;
+ case GCClipMask:
+ (* pgcDst->funcs->CopyClip)(pgcDst, pgcSrc);
+ break;
+ case GCDashOffset:
+ pgcDst->dashOffset = pgcSrc->dashOffset;
+ break;
+ case GCDashList:
+ if (pgcSrc->dash == DefaultDash)
+ {
+ if (pgcDst->dash != DefaultDash)
+ {
+ xfree(pgcDst->dash);
+ pgcDst->numInDashList = pgcSrc->numInDashList;
+ pgcDst->dash = pgcSrc->dash;
+ }
+ }
+ else
+ {
+ unsigned char *dash;
+ unsigned int i;
+
+ dash = (unsigned char *)xalloc(pgcSrc->numInDashList *
+ sizeof(unsigned char));
+ if (dash)
+ {
+ if (pgcDst->dash != DefaultDash)
+ xfree(pgcDst->dash);
+ pgcDst->numInDashList = pgcSrc->numInDashList;
+ pgcDst->dash = dash;
+ for (i=0; i<pgcSrc->numInDashList; i++)
+ dash[i] = pgcSrc->dash[i];
+ }
+ else
+ error = BadAlloc;
+ }
+ break;
+ case GCArcMode:
+ pgcDst->arcMode = pgcSrc->arcMode;
+ break;
+ default:
+ clientErrorValue = maskQ;
+ error = BadValue;
+ break;
+ }
+ }
+ if (pgcDst->fillStyle == FillTiled && pgcDst->tileIsPixel)
+ {
+ if (!CreateDefaultTile (pgcDst))
+ {
+ pgcDst->fillStyle = FillSolid;
+ error = BadAlloc;
+ }
+ }
+ (*pgcDst->funcs->CopyGC) (pgcSrc, maskQ, pgcDst);
+ return error;
+}
+
+/**
+ * does the diX part of freeing the characteristics in the GC.
+ *
+ * \param value must conform to DeleteType
+ */
+_X_EXPORT int
+FreeGC(pointer value, XID gid)
+{
+ GCPtr pGC = (GCPtr)value;
+
+ CloseFont(pGC->font, (Font)0);
+ (* pGC->funcs->DestroyClip)(pGC);
+
+ if (!pGC->tileIsPixel)
+ (* pGC->pScreen->DestroyPixmap)(pGC->tile.pixmap);
+ if (pGC->stipple)
+ (* pGC->pScreen->DestroyPixmap)(pGC->stipple);
+
+ (*pGC->funcs->DestroyGC) (pGC);
+ if (pGC->dash != DefaultDash)
+ xfree(pGC->dash);
+ dixFreePrivates(pGC->devPrivates);
+ xfree(pGC);
+ return(Success);
+}
+
+/* CreateScratchGC(pScreen, depth)
+ like CreateGC, but doesn't do the default tile or stipple,
+since we can't create them without already having a GC. any code
+using the tile or stipple has to set them explicitly anyway,
+since the state of the scratch gc is unknown. This is OK
+because ChangeGC() has to be able to deal with NULL tiles and
+stipples anyway (in case the CreateGC() call has provided a
+value for them -- we can't set the default tile until the
+client-supplied attributes are installed, since the fgPixel
+is what fills the default tile. (maybe this comment should
+go with CreateGC() or ChangeGC().)
+*/
+
+_X_EXPORT GCPtr
+CreateScratchGC(ScreenPtr pScreen, unsigned depth)
+{
+ GCPtr pGC;
+
+ pGC = (GCPtr)xalloc(sizeof(GC));
+ if (!pGC)
+ return (GCPtr)NULL;
+
+ pGC->pScreen = pScreen;
+ pGC->depth = depth;
+ pGC->alu = GXcopy; /* dst <- src */
+ pGC->planemask = ~0;
+ pGC->serialNumber = 0;
+ pGC->devPrivates = NULL;
+ pGC->fgPixel = 0;
+ pGC->bgPixel = 1;
+ pGC->lineWidth = 0;
+ pGC->lineStyle = LineSolid;
+ pGC->capStyle = CapButt;
+ pGC->joinStyle = JoinMiter;
+ pGC->fillStyle = FillSolid;
+ pGC->fillRule = EvenOddRule;
+ pGC->arcMode = ArcPieSlice;
+ pGC->font = defaultFont;
+ if ( pGC->font) /* necessary, because open of default font could fail */
+ pGC->font->refcnt++;
+ pGC->tileIsPixel = TRUE;
+ pGC->tile.pixel = 0;
+ pGC->stipple = NullPixmap;
+ pGC->patOrg.x = 0;
+ pGC->patOrg.y = 0;
+ pGC->subWindowMode = ClipByChildren;
+ pGC->graphicsExposures = TRUE;
+ pGC->clipOrg.x = 0;
+ pGC->clipOrg.y = 0;
+ pGC->clientClipType = CT_NONE;
+ pGC->dashOffset = 0;
+ pGC->numInDashList = 2;
+ pGC->dash = DefaultDash;
+ pGC->lastWinOrg.x = 0;
+ pGC->lastWinOrg.y = 0;
+
+ pGC->stateChanges = (1 << (GCLastBit+1)) - 1;
+ if (!(*pScreen->CreateGC)(pGC))
+ {
+ FreeGC(pGC, (XID)0);
+ pGC = (GCPtr)NULL;
+ }
+ return pGC;
+}
+
+void
+FreeGCperDepth(int screenNum)
+{
+ int i;
+ ScreenPtr pScreen;
+ GCPtr *ppGC;
+
+ pScreen = screenInfo.screens[screenNum];
+ ppGC = pScreen->GCperDepth;
+
+ for (i = 0; i <= pScreen->numDepths; i++)
+ (void)FreeGC(ppGC[i], (XID)0);
+ pScreen->rgf = ~0L;
+}
+
+
+Bool
+CreateGCperDepth(int screenNum)
+{
+ int i;
+ ScreenPtr pScreen;
+ DepthPtr pDepth;
+ GCPtr *ppGC;
+
+ pScreen = screenInfo.screens[screenNum];
+ pScreen->rgf = 0;
+ ppGC = pScreen->GCperDepth;
+ /* do depth 1 separately because it's not included in list */
+ if (!(ppGC[0] = CreateScratchGC(pScreen, 1)))
+ return FALSE;
+ ppGC[0]->graphicsExposures = FALSE;
+ /* Make sure we don't overflow GCperDepth[] */
+ if( pScreen->numDepths > MAXFORMATS )
+ return FALSE;
+
+ pDepth = pScreen->allowedDepths;
+ for (i=0; i<pScreen->numDepths; i++, pDepth++)
+ {
+ if (!(ppGC[i+1] = CreateScratchGC(pScreen, pDepth->depth)))
+ {
+ for (; i >= 0; i--)
+ (void)FreeGC(ppGC[i], (XID)0);
+ return FALSE;
+ }
+ ppGC[i+1]->graphicsExposures = FALSE;
+ }
+ return TRUE;
+}
+
+Bool
+CreateDefaultStipple(int screenNum)
+{
+ ScreenPtr pScreen;
+ XID tmpval[3];
+ xRectangle rect;
+ CARD16 w, h;
+ GCPtr pgcScratch;
+
+ pScreen = screenInfo.screens[screenNum];
+
+ w = 16;
+ h = 16;
+ (* pScreen->QueryBestSize)(StippleShape, &w, &h, pScreen);
+ if (!(pScreen->PixmapPerDepth[0] =
+ (*pScreen->CreatePixmap)(pScreen, w, h, 1, 0)))
+ return FALSE;
+ /* fill stipple with 1 */
+ tmpval[0] = GXcopy; tmpval[1] = 1; tmpval[2] = FillSolid;
+ pgcScratch = GetScratchGC(1, pScreen);
+ if (!pgcScratch)
+ {
+ (*pScreen->DestroyPixmap)(pScreen->PixmapPerDepth[0]);
+ return FALSE;
+ }
+ (void)ChangeGC(pgcScratch, GCFunction|GCForeground|GCFillStyle, tmpval);
+ ValidateGC((DrawablePtr)pScreen->PixmapPerDepth[0], pgcScratch);
+ rect.x = 0;
+ rect.y = 0;
+ rect.width = w;
+ rect.height = h;
+ (*pgcScratch->ops->PolyFillRect)((DrawablePtr)pScreen->PixmapPerDepth[0],
+ pgcScratch, 1, &rect);
+ FreeScratchGC(pgcScratch);
+ return TRUE;
+}
+
+void
+FreeDefaultStipple(int screenNum)
+{
+ ScreenPtr pScreen = screenInfo.screens[screenNum];
+ (*pScreen->DestroyPixmap)(pScreen->PixmapPerDepth[0]);
+}
+
+_X_EXPORT int
+SetDashes(GCPtr pGC, unsigned offset, unsigned ndash, unsigned char *pdash)
+{
+ long i;
+ unsigned char *p, *indash;
+ BITS32 maskQ = 0;
+
+ i = ndash;
+ p = pdash;
+ while (i--)
+ {
+ if (!*p++)
+ {
+ /* dash segment must be > 0 */
+ clientErrorValue = 0;
+ return BadValue;
+ }
+ }
+
+ if (ndash & 1)
+ p = (unsigned char *)xalloc(2 * ndash * sizeof(unsigned char));
+ else
+ p = (unsigned char *)xalloc(ndash * sizeof(unsigned char));
+ if (!p)
+ return BadAlloc;
+
+ pGC->serialNumber |= GC_CHANGE_SERIAL_BIT;
+ if (offset != pGC->dashOffset)
+ {
+ pGC->dashOffset = offset;
+ pGC->stateChanges |= GCDashOffset;
+ maskQ |= GCDashOffset;
+ }
+
+ if (pGC->dash != DefaultDash)
+ xfree(pGC->dash);
+ pGC->numInDashList = ndash;
+ pGC->dash = p;
+ if (ndash & 1)
+ {
+ pGC->numInDashList += ndash;
+ indash = pdash;
+ i = ndash;
+ while (i--)
+ *p++ = *indash++;
+ }
+ while(ndash--)
+ *p++ = *pdash++;
+ pGC->stateChanges |= GCDashList;
+ maskQ |= GCDashList;
+
+ if (pGC->funcs->ChangeGC)
+ (*pGC->funcs->ChangeGC) (pGC, maskQ);
+ return Success;
+}
+
+_X_EXPORT int
+VerifyRectOrder(int nrects, xRectangle *prects, int ordering)
+{
+ xRectangle *prectP, *prectN;
+ int i;
+
+ switch(ordering)
+ {
+ case Unsorted:
+ return CT_UNSORTED;
+ case YSorted:
+ if(nrects > 1)
+ {
+ for(i = 1, prectP = prects, prectN = prects + 1;
+ i < nrects;
+ i++, prectP++, prectN++)
+ if(prectN->y < prectP->y)
+ return -1;
+ }
+ return CT_YSORTED;
+ case YXSorted:
+ if(nrects > 1)
+ {
+ for(i = 1, prectP = prects, prectN = prects + 1;
+ i < nrects;
+ i++, prectP++, prectN++)
+ if((prectN->y < prectP->y) ||
+ ( (prectN->y == prectP->y) &&
+ (prectN->x < prectP->x) ) )
+ return -1;
+ }
+ return CT_YXSORTED;
+ case YXBanded:
+ if(nrects > 1)
+ {
+ for(i = 1, prectP = prects, prectN = prects + 1;
+ i < nrects;
+ i++, prectP++, prectN++)
+ if((prectN->y != prectP->y &&
+ prectN->y < prectP->y + (int) prectP->height) ||
+ ((prectN->y == prectP->y) &&
+ (prectN->height != prectP->height ||
+ prectN->x < prectP->x + (int) prectP->width)))
+ return -1;
+ }
+ return CT_YXBANDED;
+ }
+ return -1;
+}
+
+_X_EXPORT int
+SetClipRects(GCPtr pGC, int xOrigin, int yOrigin, int nrects,
+ xRectangle *prects, int ordering)
+{
+ int newct, size;
+ xRectangle *prectsNew;
+
+ newct = VerifyRectOrder(nrects, prects, ordering);
+ if (newct < 0)
+ return(BadMatch);
+ size = nrects * sizeof(xRectangle);
+ prectsNew = (xRectangle *) xalloc(size);
+ if (!prectsNew && size)
+ return BadAlloc;
+
+ pGC->serialNumber |= GC_CHANGE_SERIAL_BIT;
+ pGC->clipOrg.x = xOrigin;
+ pGC->stateChanges |= GCClipXOrigin;
+
+ pGC->clipOrg.y = yOrigin;
+ pGC->stateChanges |= GCClipYOrigin;
+
+ if (size)
+ memmove((char *)prectsNew, (char *)prects, size);
+ (*pGC->funcs->ChangeClip)(pGC, newct, (pointer)prectsNew, nrects);
+ if (pGC->funcs->ChangeGC)
+ (*pGC->funcs->ChangeGC) (pGC, GCClipXOrigin|GCClipYOrigin|GCClipMask);
+ return Success;
+}
+
+
+/*
+ sets reasonable defaults
+ if we can get a pre-allocated one, use it and mark it as used.
+ if we can't, create one out of whole cloth (The Velveteen GC -- if
+ you use it often enough it will become real.)
+*/
+_X_EXPORT GCPtr
+GetScratchGC(unsigned depth, ScreenPtr pScreen)
+{
+ int i;
+ GCPtr pGC;
+
+ for (i=0; i<=pScreen->numDepths; i++)
+ if ( pScreen->GCperDepth[i]->depth == depth &&
+ !(pScreen->rgf & (1L << (i+1)))
+ )
+ {
+ pScreen->rgf |= (1L << (i+1));
+ pGC = (pScreen->GCperDepth[i]);
+
+ pGC->alu = GXcopy;
+ pGC->planemask = ~0;
+ pGC->serialNumber = 0;
+ pGC->fgPixel = 0;
+ pGC->bgPixel = 1;
+ pGC->lineWidth = 0;
+ pGC->lineStyle = LineSolid;
+ pGC->capStyle = CapButt;
+ pGC->joinStyle = JoinMiter;
+ pGC->fillStyle = FillSolid;
+ pGC->fillRule = EvenOddRule;
+ pGC->arcMode = ArcChord;
+ pGC->patOrg.x = 0;
+ pGC->patOrg.y = 0;
+ pGC->subWindowMode = ClipByChildren;
+ pGC->graphicsExposures = FALSE;
+ pGC->clipOrg.x = 0;
+ pGC->clipOrg.y = 0;
+ if (pGC->clientClipType != CT_NONE)
+ (*pGC->funcs->ChangeClip) (pGC, CT_NONE, NULL, 0);
+ pGC->stateChanges = (1 << (GCLastBit+1)) - 1;
+ return pGC;
+ }
+ /* if we make it this far, need to roll our own */
+ pGC = CreateScratchGC(pScreen, depth);
+ if (pGC)
+ pGC->graphicsExposures = FALSE;
+ return pGC;
+}
+
+/*
+ if the gc to free is in the table of pre-existing ones,
+mark it as available.
+ if not, free it for real
+*/
+_X_EXPORT void
+FreeScratchGC(GCPtr pGC)
+{
+ ScreenPtr pScreen = pGC->pScreen;
+ int i;
+
+ for (i=0; i<=pScreen->numDepths; i++)
+ {
+ if ( pScreen->GCperDepth[i] == pGC)
+ {
+ pScreen->rgf &= ~(1L << (i+1));
+ return;
+ }
+ }
+ (void)FreeGC(pGC, (GContext)0);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 05:01:33 +0000