/*********************************************************** Copyright (c) 1987 X Consortium 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, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: 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 X CONSORTIUM 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 X Consortium 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 X Consortium. 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. ******************************************************************/ /* $XConsortium: gc.c,v 5.27 94/04/17 20:26:36 dpw Exp $ */ #include "X.h" #include "Xmd.h" #include "Xproto.h" #include "misc.h" #include "resource.h" #include "gcstruct.h" #include "pixmapstr.h" #include "dixfontstr.h" #include "scrnintstr.h" #include "region.h" #include "dix.h" extern XID clientErrorValue; static Bool CreateDefaultTile( #if NeedFunctionPrototypes GCPtr /*pGC*/ #endif ); unsigned char DefaultDash[2] = {4, 4}; void ValidateGC(pDraw, pGC) DrawablePtr pDraw; GC *pGC; { (*pGC->funcs->ValidateGC) (pGC, pGC->stateChanges, pDraw); pGC->stateChanges = 0; pGC->serialNumber = pDraw->serialNumber; } /* Publically defined entry to ChangeGC. Just calls DoChangeGC and tells * it that all of the entries are constants or IDs */ int ChangeGC(pGC, mask, pval) register GC *pGC; register BITS32 mask; XID *pval; { return (DoChangeGC(pGC, mask, pval, 0)); } /* 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. I wish we could change the interface to accept a union of (XID, pointer), but it's too late. 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 */ #define NEXTVAL(_type, _var) \ { if (fPointer) _var = (_type)*pPtr++; else _var = (_type)*pval++; } int DoChangeGC(pGC, mask, pval, fPointer) register GC *pGC; register BITS32 mask; XID *pval; int fPointer; { register BITS32 index; register int error = 0; PixmapPtr pPixmap; BITS32 maskQ; pointer *pPtr = (pointer *)pval; pGC->serialNumber |= GC_CHANGE_SERIAL_BIT; maskQ = mask; /* save these for when we walk the GCque */ while (mask && !error) { index = (BITS32) lowbit (mask); mask &= ~index; pGC->stateChanges |= index; switch (index) { 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 (fPointer) { pPixmap = (PixmapPtr) *pPtr++; } else { newpix = (XID)*pval++; pPixmap = (PixmapPtr)LookupIDByType(newpix, RT_PIXMAP); } if (pPixmap) { 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 = BadPixmap; } break; } case GCStipple: { XID newstipple = 0; if (fPointer) { pPixmap = (PixmapPtr) *pPtr++; } else { newstipple = (XID)*pval++; pPixmap = (PixmapPtr)LookupIDByType(newstipple, RT_PIXMAP); } if (pPixmap) { 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 = BadPixmap; } 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 (fPointer) { pFont = (FontPtr) *pPtr++; } else { newfont = (XID)*pval++; pFont = (FontPtr)LookupIDByType(newfont, RT_FONT); } if (pFont) { pFont->refcnt++; if (pGC->font) CloseFont(pGC->font, (Font)0); pGC->font = pFont; } else { clientErrorValue = newfont; error = BadFont; } 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; int clipType; if (fPointer) { pPixmap = (PixmapPtr)*pPtr++; } else { pid = (Pixmap)*pval++; if (pid == None) { clipType = CT_NONE; pPixmap = NullPixmap; } else pPixmap = (PixmapPtr)LookupIDByType(pid, RT_PIXMAP); } if (pPixmap) { if ((pPixmap->drawable.depth != 1) || (pPixmap->drawable.pScreen != pGC->pScreen)) { error = BadMatch; } else { clipType = CT_PIXMAP; pPixmap->refcnt++; } } else if (!fPointer && (pid != None)) { clientErrorValue = pid; error = BadPixmap; } 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 /* 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 */ static GCPtr AllocateGC(pScreen) ScreenPtr pScreen; { GCPtr pGC; register char *ptr; register DevUnion *ppriv; register unsigned *sizes; register unsigned size; register int i; pGC = (GCPtr)xalloc(pScreen->totalGCSize); if (pGC) { ppriv = (DevUnion *)(pGC + 1); pGC->devPrivates = ppriv; sizes = pScreen->GCPrivateSizes; ptr = (char *)(ppriv + pScreen->GCPrivateLen); for (i = pScreen->GCPrivateLen; --i >= 0; ppriv++, sizes++) { if ( (size = *sizes) ) { ppriv->ptr = (pointer)ptr; ptr += size; } else ppriv->ptr = (pointer)NULL; } } return pGC; } GCPtr CreateGC(pDrawable, mask, pval, pStatus) DrawablePtr pDrawable; BITS32 mask; XID *pval; int *pStatus; { register GCPtr pGC; extern FontPtr defaultFont; pGC = AllocateGC(pDrawable->pScreen); 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->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++; pGC->stateChanges = (1 << GCLastBit+1) - 1; if (!(*pGC->pScreen->CreateGC)(pGC)) *pStatus = BadAlloc; else if (mask) *pStatus = ChangeGC(pGC, mask, pval); else *pStatus = Success; 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 (pGC) 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); 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; } int CopyGC(pgcSrc, pgcDst, mask) register GC *pgcSrc; register GC *pgcDst; register BITS32 mask; { register BITS32 index; BITS32 maskQ; int i; int error = 0; if (pgcSrc == pgcDst) return Success; pgcDst->serialNumber |= GC_CHANGE_SERIAL_BIT; pgcDst->stateChanges |= mask; maskQ = mask; while (mask) { index = (BITS32) lowbit (mask); mask &= ~index; switch (index) { 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; 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; inumInDashList; 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; } /***************** * FreeGC * does the diX part of freeing the characteristics in the GC ***************/ /*ARGSUSED*/ int FreeGC(value, gid) pointer value; /* must conform to DeleteType */ 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); xfree(pGC); return(Success); } void SetGCMask(pGC, selectMask, newDataMask) GCPtr pGC; Mask selectMask; Mask newDataMask; { pGC->stateChanges = (~selectMask & pGC->stateChanges) | (selectMask & newDataMask); if (selectMask & newDataMask) pGC->serialNumber |= GC_CHANGE_SERIAL_BIT; } /* 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().) */ GCPtr CreateScratchGC(pScreen, depth) ScreenPtr pScreen; unsigned depth; { register GCPtr pGC; extern FontPtr defaultFont; pGC = AllocateGC(pScreen); if (!pGC) return (GCPtr)NULL; pGC->pScreen = pScreen; pGC->depth = depth; pGC->alu = GXcopy; /* dst <- src */ 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 = 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(screenNum) int screenNum; { register int i; register 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(screenNum) int screenNum; { register int i; register 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; pDepth = pScreen->allowedDepths; for (i=0; inumDepths; 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(screenNum) int screenNum; { register 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))) 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(screenNum) int screenNum; { ScreenPtr pScreen = screenInfo.screens[screenNum]; (*pScreen->DestroyPixmap)(pScreen->PixmapPerDepth[0]); } int SetDashes(pGC, offset, ndash, pdash) register GCPtr pGC; unsigned offset; register unsigned ndash; register unsigned char *pdash; { register long i; register 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; } int VerifyRectOrder(nrects, prects, ordering) int nrects; xRectangle *prects; int ordering; { register xRectangle *prectP, *prectN; register 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; } int SetClipRects(pGC, xOrigin, yOrigin, nrects, prects, ordering) GCPtr pGC; int xOrigin, 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.) */ GCPtr GetScratchGC(depth, pScreen) register unsigned depth; register ScreenPtr pScreen; { register int i; register 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 */ void FreeScratchGC(pGC) register GCPtr pGC; { register ScreenPtr pScreen = pGC->pScreen; register 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); }