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+/* $XFree86: xc/programs/Xserver/afb/afbgc.c,v 3.2 1999/06/20 15:02:46 dawes Exp $ */
+/***********************************************************
+
+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: afbgc.c,v 5.35 94/04/17 20:28:23 dpw Exp $ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <X11/X.h>
+#include <X11/Xmd.h>
+#include <X11/Xproto.h>
+#include "afb.h"
+#include "dixfontstr.h"
+#include <X11/fonts/fontstruct.h>
+#include "gcstruct.h"
+#include "windowstr.h"
+#include "pixmapstr.h"
+#include "scrnintstr.h"
+#include "region.h"
+
+#include "mistruct.h"
+#include "migc.h"
+
+#include "maskbits.h"
+
+static GCFuncs afbFuncs = {
+ afbValidateGC,
+ miChangeGC,
+ miCopyGC,
+ afbDestroyGC,
+ miChangeClip,
+ miDestroyClip,
+ miCopyClip
+};
+
+static GCOps afbGCOps = {
+ afbSolidFS,
+ afbSetSpans,
+ afbPutImage,
+ afbCopyArea,
+ miCopyPlane,
+ afbPolyPoint,
+ afbLineSS,
+ afbSegmentSS,
+ miPolyRectangle,
+ afbZeroPolyArcSS,
+ afbFillPolygonSolid,
+ afbPolyFillRect,
+ afbPolyFillArcSolid,
+ miPolyText8,
+ miPolyText16,
+ miImageText8,
+ miImageText16,
+ afbTEGlyphBlt,
+ afbPolyGlyphBlt,
+ afbPushPixels
+#ifdef NEED_LINEHELPER
+ ,NULL
+#endif
+};
+
+
+Bool
+afbCreateGC(pGC)
+ register GCPtr pGC;
+{
+ afbPrivGC *pPriv;
+
+ pGC->clientClip = NULL;
+ pGC->clientClipType = CT_NONE;
+
+ /* some of the output primitives aren't really necessary, since
+ they will be filled in ValidateGC because of dix/CreateGC()
+ setting all the change bits. Others are necessary because although
+ they depend on being a monochrome frame buffer, they don't change
+ */
+
+ pGC->ops = &afbGCOps;
+ pGC->funcs = &afbFuncs;
+
+ /* afb wants to translate before scan convesion */
+ pGC->miTranslate = 1;
+
+ pPriv = (afbPrivGC *)(pGC->devPrivates[afbGCPrivateIndex].ptr);
+ afbReduceRop(pGC->alu, pGC->fgPixel, pGC->planemask, pGC->depth,
+ pPriv->rrops);
+ afbReduceOpaqueStipple(pGC->fgPixel, pGC->bgPixel, pGC->planemask,
+ pGC->depth, pPriv->rropOS);
+
+ pGC->fExpose = TRUE;
+ pGC->pRotatedPixmap = NullPixmap;
+ pGC->freeCompClip = FALSE;
+ return TRUE;
+}
+
+/* Clipping conventions
+ if the drawable is a window
+ CT_REGION ==> pCompositeClip really is the composite
+ CT_other ==> pCompositeClip is the window clip region
+ if the drawable is a pixmap
+ CT_REGION ==> pCompositeClip is the translated client region
+ clipped to the pixmap boundary
+ CT_other ==> pCompositeClip is the pixmap bounding box
+*/
+
+/*ARGSUSED*/
+void
+afbValidateGC(pGC, changes, pDrawable)
+ register GCPtr pGC;
+ unsigned long changes;
+ DrawablePtr pDrawable;
+{
+ register afbPrivGCPtr devPriv;
+ int mask; /* stateChanges */
+ int index; /* used for stepping through bitfields */
+ int xrot, yrot; /* rotations for tile and stipple pattern */
+ /* flags for changing the proc vector
+ and updating things in devPriv
+ */
+ int new_rotate, new_rrop, new_line, new_text, new_fill;
+ DDXPointRec oldOrg; /* origin of thing GC was last used with */
+
+ oldOrg = pGC->lastWinOrg;
+
+ pGC->lastWinOrg.x = pDrawable->x;
+ pGC->lastWinOrg.y = pDrawable->y;
+
+ /* we need to re-rotate the tile if the previous window/pixmap
+ origin (oldOrg) differs from the new window/pixmap origin
+ (pGC->lastWinOrg)
+ */
+ new_rotate = (oldOrg.x != pGC->lastWinOrg.x) ||
+ (oldOrg.y != pGC->lastWinOrg.y);
+
+
+ devPriv = ((afbPrivGCPtr)(pGC->devPrivates[afbGCPrivateIndex].ptr));
+
+
+ /*
+ if the client clip is different or moved OR
+ the subwindowMode has changed OR
+ the window's clip has changed since the last validation
+ we need to recompute the composite clip
+ */
+ if ((changes & (GCClipXOrigin|GCClipYOrigin|GCClipMask|GCSubwindowMode)) ||
+ (pDrawable->serialNumber != (pGC->serialNumber & DRAWABLE_SERIAL_BITS)))
+ afbComputeCompositeClip(pGC, pDrawable);
+
+ new_rrop = FALSE;
+ new_line = FALSE;
+ new_text = FALSE;
+ new_fill = FALSE;
+
+ mask = changes;
+ while (mask) {
+ index = lowbit(mask);
+ mask &= ~index;
+
+ /* this switch acculmulates a list of which procedures
+ might have to change due to changes in the GC. in
+ some cases (e.g. changing one 16 bit tile for another)
+ we might not really need a change, but the code is
+ being paranoid.
+ this sort of batching wins if, for example, the alu
+ and the font have been changed, or any other pair
+ of items that both change the same thing.
+ */
+ switch (index) {
+ case GCPlaneMask:
+ case GCFunction:
+ case GCForeground:
+ new_rrop = TRUE;
+ break;
+ case GCBackground:
+ new_rrop = TRUE; /* for opaque stipples */
+ break;
+ case GCLineStyle:
+ case GCLineWidth:
+ case GCJoinStyle:
+ new_line = TRUE;
+ break;
+ case GCCapStyle:
+ break;
+ case GCFillStyle:
+ new_fill = TRUE;
+ break;
+ case GCFillRule:
+ break;
+ case GCTile:
+ if(pGC->tileIsPixel)
+ break;
+ new_rotate = TRUE;
+ new_fill = TRUE;
+ break;
+
+ case GCStipple:
+ if(pGC->stipple == (PixmapPtr)NULL)
+ break;
+ new_rotate = TRUE;
+ new_fill = TRUE;
+ break;
+
+ case GCTileStipXOrigin:
+ new_rotate = TRUE;
+ break;
+
+ case GCTileStipYOrigin:
+ new_rotate = TRUE;
+ break;
+
+ case GCFont:
+ new_text = TRUE;
+ break;
+ case GCSubwindowMode:
+ break;
+ case GCGraphicsExposures:
+ break;
+ case GCClipXOrigin:
+ break;
+ case GCClipYOrigin:
+ break;
+ case GCClipMask:
+ break;
+ case GCDashOffset:
+ break;
+ case GCDashList:
+ break;
+ case GCArcMode:
+ break;
+ default:
+ break;
+ }
+ }
+
+ /* deal with the changes we've collected .
+ new_rrop must be done first because subsequent things
+ depend on it.
+ */
+
+ if(new_rotate || new_fill) {
+ Bool new_pix = FALSE;
+
+ /* figure out how much to rotate */
+ xrot = pGC->patOrg.x;
+ yrot = pGC->patOrg.y;
+ xrot += pDrawable->x;
+ yrot += pDrawable->y;
+
+ switch (pGC->fillStyle) {
+ case FillTiled:
+ /* copy current tile and stipple */
+ if (!pGC->tileIsPixel &&
+ (pGC->tile.pixmap->drawable.width <= PPW) &&
+ !(pGC->tile.pixmap->drawable.width &
+ (pGC->tile.pixmap->drawable.width - 1))) {
+ afbCopyRotatePixmap(pGC->tile.pixmap, &pGC->pRotatedPixmap,
+ xrot, yrot);
+ new_pix = TRUE;
+ }
+ break;
+ case FillStippled:
+ case FillOpaqueStippled:
+ if (pGC->stipple && (pGC->stipple->drawable.width <= PPW) &&
+ !(pGC->stipple->drawable.width &
+ (pGC->stipple->drawable.width - 1))) {
+ afbCopyRotatePixmap(pGC->stipple, &pGC->pRotatedPixmap,
+ xrot, yrot);
+ new_pix = TRUE;
+ }
+ }
+ /* destroy any previously rotated tile or stipple */
+ if (!new_pix && pGC->pRotatedPixmap) {
+ (*pDrawable->pScreen->DestroyPixmap)(pGC->pRotatedPixmap);
+ pGC->pRotatedPixmap = (PixmapPtr)NULL;
+ }
+ }
+
+ /*
+ * duck out here when the GC is unchanged
+ */
+
+ if (!changes)
+ return;
+
+ if (new_rrop || new_fill) {
+ afbReduceRop(pGC->alu, pGC->fgPixel, pGC->planemask, pDrawable->depth,
+ devPriv->rrops);
+ afbReduceOpaqueStipple(pGC->fgPixel, pGC->bgPixel, pGC->planemask,
+ pGC->depth, devPriv->rropOS);
+ new_fill = TRUE;
+ }
+
+ if (new_line || new_fill || new_text) {
+ if (!pGC->ops->devPrivate.val) {
+ pGC->ops = miCreateGCOps(pGC->ops);
+ pGC->ops->devPrivate.val = 1;
+ }
+ }
+
+ if (new_line || new_fill) {
+ if (pGC->lineWidth == 0) {
+ if (pGC->lineStyle == LineSolid && pGC->fillStyle == FillSolid)
+ pGC->ops->PolyArc = afbZeroPolyArcSS;
+ else
+ pGC->ops->PolyArc = miZeroPolyArc;
+ } else
+ pGC->ops->PolyArc = miPolyArc;
+ if (pGC->lineStyle == LineSolid) {
+ if(pGC->lineWidth == 0) {
+ if (pGC->fillStyle == FillSolid) {
+ pGC->ops->PolySegment = afbSegmentSS;
+ pGC->ops->Polylines = afbLineSS;
+ }
+ else
+ {
+ pGC->ops->PolySegment = miPolySegment;
+ pGC->ops->Polylines = miZeroLine;
+ }
+ } else {
+ pGC->ops->PolySegment = miPolySegment;
+ pGC->ops->Polylines = miWideLine;
+ }
+ } else {
+ if(pGC->lineWidth == 0 && pGC->fillStyle == FillSolid) {
+ pGC->ops->PolySegment = afbSegmentSD;
+ pGC->ops->Polylines = afbLineSD;
+ } else {
+ pGC->ops->PolySegment = miPolySegment;
+ pGC->ops->Polylines = miWideDash;
+ }
+ }
+ }
+
+ if (new_text || new_fill) {
+ if ((pGC->font) &&
+ (FONTMAXBOUNDS(pGC->font,rightSideBearing) -
+ FONTMINBOUNDS(pGC->font,leftSideBearing) > 32 ||
+ FONTMINBOUNDS(pGC->font,characterWidth) < 0)) {
+ pGC->ops->PolyGlyphBlt = miPolyGlyphBlt;
+ pGC->ops->ImageGlyphBlt = miImageGlyphBlt;
+ } else {
+ /* special case ImageGlyphBlt for terminal emulator fonts */
+ if ((pGC->font) &&
+ TERMINALFONT(pGC->font)) {
+ pGC->ops->ImageGlyphBlt = afbTEGlyphBlt;
+ } else {
+ pGC->ops->ImageGlyphBlt = afbImageGlyphBlt;
+ }
+
+ /* now do PolyGlyphBlt */
+ if (pGC->fillStyle == FillSolid) {
+ pGC->ops->PolyGlyphBlt = afbPolyGlyphBlt;
+ } else {
+ pGC->ops->PolyGlyphBlt = miPolyGlyphBlt;
+ }
+ }
+ }
+
+ if (new_fill) {
+ /* install a suitable fillspans and pushpixels */
+ pGC->ops->PushPixels = afbPushPixels;
+ pGC->ops->FillPolygon = miFillPolygon;
+ pGC->ops->PolyFillArc = miPolyFillArc;
+
+ switch (pGC->fillStyle) {
+ case FillSolid:
+ pGC->ops->FillSpans = afbSolidFS;
+ pGC->ops->FillPolygon = afbFillPolygonSolid;
+ pGC->ops->PolyFillArc = afbPolyFillArcSolid;
+ break;
+ case FillTiled:
+ if (pGC->pRotatedPixmap)
+ pGC->ops->FillSpans = afbTileFS;
+ else
+ pGC->ops->FillSpans = afbUnnaturalTileFS;
+ break;
+ case FillOpaqueStippled:
+ if (pGC->pRotatedPixmap)
+ pGC->ops->FillSpans = afbOpaqueStippleFS;
+ else
+ pGC->ops->FillSpans = afbUnnaturalOpaqueStippleFS;
+ break;
+
+ case FillStippled:
+ if (pGC->pRotatedPixmap)
+ pGC->ops->FillSpans = afbStippleFS;
+ else
+ pGC->ops->FillSpans = afbUnnaturalStippleFS;
+ break;
+ }
+ } /* end of new_fill */
+}
+
+void
+afbDestroyGC(pGC)
+ GCPtr pGC;
+{
+ if (pGC->pRotatedPixmap)
+ (*pGC->pScreen->DestroyPixmap)(pGC->pRotatedPixmap);
+ if (pGC->freeCompClip)
+ REGION_DESTROY(pGC->pScreen, pGC->pCompositeClip);
+ miDestroyGCOps(pGC->ops);
+}
+
+/* table to map alu(src, dst) to alu(~src, dst) */
+int afbInverseAlu[16] = {
+ GXclear,
+ GXandInverted,
+ GXnor,
+ GXcopyInverted,
+ GXand,
+ GXnoop,
+ GXequiv,
+ GXorInverted,
+ GXandReverse,
+ GXxor,
+ GXinvert,
+ GXnand,
+ GXcopy,
+ GXor,
+ GXorReverse,
+ GXset
+};
+
+void
+afbReduceOpaqueStipple(fg, bg, planemask, depth, rop)
+register PixelType fg;
+register PixelType bg;
+register unsigned long planemask;
+int depth;
+register unsigned char *rop;
+{
+ register int d;
+ register Pixel mask = 1;
+
+ bg ^= fg;
+
+ for (d = 0; d < depth; d++, mask <<= 1) {
+ if (!(planemask & mask))
+ rop[d] = RROP_NOP;
+ else if (!(bg & mask)) {
+ /* Both fg and bg have a 0 or 1 in this plane */
+ if (fg & mask)
+ rop[d] = RROP_WHITE;
+ else
+ rop[d] = RROP_BLACK;
+ } else {
+ /* Both fg and bg have different bits on this plane */
+ if (fg & mask)
+ rop[d] = RROP_COPY;
+ else
+ rop[d] = RROP_INVERT;
+ }
+ }
+}
+
+void
+afbReduceRop(alu, src, planemask, depth, rop)
+ register int alu;
+ register Pixel src;
+ register unsigned long planemask;
+ int depth;
+ register unsigned char *rop;
+{
+ register int d;
+ register Pixel mask = 1;
+
+ for (d = 0; d < depth; d++, mask <<= 1) {
+ if (!(planemask & mask))
+ rop[d] = RROP_NOP;
+ else if ((src & mask) == 0) /* src is black */
+ switch (alu) {
+ case GXclear:
+ rop[d] = RROP_BLACK;
+ break;
+ case GXand:
+ rop[d] = RROP_BLACK;
+ break;
+ case GXandReverse:
+ rop[d] = RROP_BLACK;
+ break;
+ case GXcopy:
+ rop[d] = RROP_BLACK;
+ break;
+ case GXandInverted:
+ rop[d] = RROP_NOP;
+ break;
+ case GXnoop:
+ rop[d] = RROP_NOP;
+ break;
+ case GXxor:
+ rop[d] = RROP_NOP;
+ break;
+ case GXor:
+ rop[d] = RROP_NOP;
+ break;
+ case GXnor:
+ rop[d] = RROP_INVERT;
+ break;
+ case GXequiv:
+ rop[d] = RROP_INVERT;
+ break;
+ case GXinvert:
+ rop[d] = RROP_INVERT;
+ break;
+ case GXorReverse:
+ rop[d] = RROP_INVERT;
+ break;
+ case GXcopyInverted:
+ rop[d] = RROP_WHITE;
+ break;
+ case GXorInverted:
+ rop[d] = RROP_WHITE;
+ break;
+ case GXnand:
+ rop[d] = RROP_WHITE;
+ break;
+ case GXset:
+ rop[d] = RROP_WHITE;
+ break;
+ }
+ else /* src is white */
+ switch (alu) {
+ case GXclear:
+ rop[d] = RROP_BLACK;
+ break;
+ case GXand:
+ rop[d] = RROP_NOP;
+ break;
+ case GXandReverse:
+ rop[d] = RROP_INVERT;
+ break;
+ case GXcopy:
+ rop[d] = RROP_WHITE;
+ break;
+ case GXandInverted:
+ rop[d] = RROP_BLACK;
+ break;
+ case GXnoop:
+ rop[d] = RROP_NOP;
+ break;
+ case GXxor:
+ rop[d] = RROP_INVERT;
+ break;
+ case GXor:
+ rop[d] = RROP_WHITE;
+ break;
+ case GXnor:
+ rop[d] = RROP_BLACK;
+ break;
+ case GXequiv:
+ rop[d] = RROP_NOP;
+ break;
+ case GXinvert:
+ rop[d] = RROP_INVERT;
+ break;
+ case GXorReverse:
+ rop[d] = RROP_WHITE;
+ break;
+ case GXcopyInverted:
+ rop[d] = RROP_BLACK;
+ break;
+ case GXorInverted:
+ rop[d] = RROP_NOP;
+ break;
+ case GXnand:
+ rop[d] = RROP_INVERT;
+ break;
+ case GXset:
+ rop[d] = RROP_WHITE;
+ break;
+ }
+ }
+}
+
+void
+afbComputeCompositeClip(pGC, pDrawable)
+ GCPtr pGC;
+ DrawablePtr pDrawable;
+{
+ 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 = pGC->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(pGC->pScreen, pGC->pCompositeClip);
+ pGC->pCompositeClip = pregWin;
+ pGC->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(pGC->pScreen, pGC->clientClip,
+ pDrawable->x + pGC->clipOrg.x,
+ pDrawable->y + pGC->clipOrg.y);
+
+ if (freeCompClip) {
+ REGION_INTERSECT(pGC->pScreen, pGC->pCompositeClip, pregWin,
+ pGC->clientClip);
+ if (freeTmpClip)
+ REGION_DESTROY(pGC->pScreen, pregWin);
+ } else if (freeTmpClip) {
+ REGION_INTERSECT(pGC->pScreen, pregWin, pregWin, pGC->clientClip);
+ pGC->pCompositeClip = pregWin;
+ } else {
+ pGC->pCompositeClip = REGION_CREATE(pGC->pScreen, NullBox, 0);
+ REGION_INTERSECT(pGC->pScreen, pGC->pCompositeClip,
+ pregWin, pGC->clientClip);
+ }
+ pGC->freeCompClip = TRUE;
+ REGION_TRANSLATE(pGC->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 (pGC->freeCompClip) {
+ REGION_RESET(pGC->pScreen, pGC->pCompositeClip, &pixbounds);
+ } else {
+ pGC->freeCompClip = TRUE;
+ pGC->pCompositeClip = REGION_CREATE(pGC->pScreen, &pixbounds, 1);
+ }
+
+ if (pGC->clientClipType == CT_REGION) {
+ REGION_TRANSLATE(pGC->pScreen, pGC->pCompositeClip, -pGC->clipOrg.x,
+ -pGC->clipOrg.y);
+ REGION_INTERSECT(pGC->pScreen, pGC->pCompositeClip,
+ pGC->pCompositeClip, pGC->clientClip);
+ REGION_TRANSLATE(pGC->pScreen, pGC->pCompositeClip, pGC->clipOrg.x,
+ pGC->clipOrg.y);
+ }
+ } /* end of composite clip for pixmap */
+} /* end afbComputeCompositeClip */
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