dd33e936b3
The fb pointer would be left uninitialized when exaPixmapIsOffscreen
returned false. When it returned true and the pixmap was damaged,
fb would be initialized from the pixmap's devPrivate.ptr before the
exaDoMigration and exaPrepareAccess calls, at which point
devPrivate.ptr would still be pointing at offscreen memory.
(cherry picked from commit 3c448b0eb6)
417 lines
13 KiB
C
417 lines
13 KiB
C
/*
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*
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* Copyright © 1999 Keith Packard
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of Keith Packard not be used in
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* advertising or publicity pertaining to distribution of the software without
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* specific, written prior permission. Keith Packard makes no
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* representations about the suitability of this software for any purpose. It
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* is provided "as is" without express or implied warranty.
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*
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* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "exa_priv.h"
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/*
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* These functions wrap the low-level fb rendering functions and
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* synchronize framebuffer/accelerated drawing by stalling until
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* the accelerator is idle
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*/
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/**
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* Calls exaPrepareAccess with EXA_PREPARE_SRC for the tile, if that is the
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* current fill style.
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*
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* Solid doesn't use an extra pixmap source, and Stippled/OpaqueStippled are
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* 1bpp and never in fb, so we don't worry about them.
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*/
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void
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exaPrepareAccessGC(GCPtr pGC)
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{
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if (pGC->fillStyle == FillTiled)
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exaPrepareAccess(&pGC->tile.pixmap->drawable, EXA_PREPARE_SRC);
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}
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/**
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* Finishes access to the tile in the GC, if used.
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*/
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void
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exaFinishAccessGC(GCPtr pGC)
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{
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if (pGC->fillStyle == FillTiled)
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exaFinishAccess(&pGC->tile.pixmap->drawable, EXA_PREPARE_SRC);
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}
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#if DEBUG_TRACE_FALL
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char
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exaDrawableLocation(DrawablePtr pDrawable)
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{
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return exaDrawableIsOffscreen(pDrawable) ? 's' : 'm';
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}
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#endif /* DEBUG_TRACE_FALL */
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void
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ExaCheckFillSpans (DrawablePtr pDrawable, GCPtr pGC, int nspans,
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DDXPointPtr ppt, int *pwidth, int fSorted)
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{
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EXA_FALLBACK(("to %p (%c)\n", pDrawable, exaDrawableLocation(pDrawable)));
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exaPrepareAccess (pDrawable, EXA_PREPARE_DEST);
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exaPrepareAccessGC (pGC);
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fbFillSpans (pDrawable, pGC, nspans, ppt, pwidth, fSorted);
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exaFinishAccessGC (pGC);
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exaFinishAccess (pDrawable, EXA_PREPARE_DEST);
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}
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void
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ExaCheckSetSpans (DrawablePtr pDrawable, GCPtr pGC, char *psrc,
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DDXPointPtr ppt, int *pwidth, int nspans, int fSorted)
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{
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EXA_FALLBACK(("to %p (%c)\n", pDrawable, exaDrawableLocation(pDrawable)));
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exaPrepareAccess (pDrawable, EXA_PREPARE_DEST);
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fbSetSpans (pDrawable, pGC, psrc, ppt, pwidth, nspans, fSorted);
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exaFinishAccess (pDrawable, EXA_PREPARE_DEST);
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}
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void
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ExaCheckPutImage (DrawablePtr pDrawable, GCPtr pGC, int depth,
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int x, int y, int w, int h, int leftPad, int format,
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char *bits)
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{
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PixmapPtr pPixmap = exaGetDrawablePixmap(pDrawable);
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int xoff, yoff;
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EXA_FALLBACK(("to %p (%c)\n", pDrawable, exaDrawableLocation(pDrawable)));
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exaPrepareAccess (pDrawable, EXA_PREPARE_DEST);
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fbPutImage (pDrawable, pGC, depth, x, y, w, h, leftPad, format, bits);
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exaFinishAccess (pDrawable, EXA_PREPARE_DEST);
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exaGetDrawableDeltas(pDrawable, pPixmap, &xoff, &yoff);
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exaPixmapDirty(pPixmap, x + xoff, y + yoff, x + xoff + w, y + yoff + h);
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}
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RegionPtr
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ExaCheckCopyArea (DrawablePtr pSrc, DrawablePtr pDst, GCPtr pGC,
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int srcx, int srcy, int w, int h, int dstx, int dsty)
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{
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RegionPtr ret;
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EXA_FALLBACK(("from %p to %p (%c,%c)\n", pSrc, pDst,
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exaDrawableLocation(pSrc), exaDrawableLocation(pDst)));
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exaPrepareAccess (pDst, EXA_PREPARE_DEST);
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exaPrepareAccess (pSrc, EXA_PREPARE_SRC);
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ret = fbCopyArea (pSrc, pDst, pGC, srcx, srcy, w, h, dstx, dsty);
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exaFinishAccess (pSrc, EXA_PREPARE_SRC);
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exaFinishAccess (pDst, EXA_PREPARE_DEST);
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return ret;
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}
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RegionPtr
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ExaCheckCopyPlane (DrawablePtr pSrc, DrawablePtr pDst, GCPtr pGC,
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int srcx, int srcy, int w, int h, int dstx, int dsty,
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unsigned long bitPlane)
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{
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RegionPtr ret;
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EXA_FALLBACK(("from %p to %p (%c,%c)\n", pSrc, pDst,
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exaDrawableLocation(pSrc), exaDrawableLocation(pDst)));
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exaPrepareAccess (pDst, EXA_PREPARE_DEST);
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exaPrepareAccess (pSrc, EXA_PREPARE_SRC);
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ret = fbCopyPlane (pSrc, pDst, pGC, srcx, srcy, w, h, dstx, dsty,
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bitPlane);
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exaFinishAccess (pSrc, EXA_PREPARE_SRC);
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exaFinishAccess (pDst, EXA_PREPARE_DEST);
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return ret;
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}
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void
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ExaCheckPolyPoint (DrawablePtr pDrawable, GCPtr pGC, int mode, int npt,
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DDXPointPtr pptInit)
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{
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EXA_FALLBACK(("to %p (%c)\n", pDrawable, exaDrawableLocation(pDrawable)));
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exaPrepareAccess (pDrawable, EXA_PREPARE_DEST);
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fbPolyPoint (pDrawable, pGC, mode, npt, pptInit);
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exaFinishAccess (pDrawable, EXA_PREPARE_DEST);
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}
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void
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ExaCheckPolylines (DrawablePtr pDrawable, GCPtr pGC,
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int mode, int npt, DDXPointPtr ppt)
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{
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EXA_FALLBACK(("to %p (%c), width %d, mode %d, count %d\n",
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pDrawable, exaDrawableLocation(pDrawable),
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pGC->lineWidth, mode, npt));
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if (pGC->lineWidth == 0) {
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exaPrepareAccess (pDrawable, EXA_PREPARE_DEST);
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exaPrepareAccessGC (pGC);
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fbPolyLine (pDrawable, pGC, mode, npt, ppt);
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exaFinishAccessGC (pGC);
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exaFinishAccess (pDrawable, EXA_PREPARE_DEST);
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return;
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}
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/* fb calls mi functions in the lineWidth != 0 case. */
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fbPolyLine (pDrawable, pGC, mode, npt, ppt);
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}
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void
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ExaCheckPolySegment (DrawablePtr pDrawable, GCPtr pGC,
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int nsegInit, xSegment *pSegInit)
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{
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EXA_FALLBACK(("to %p (%c) width %d, count %d\n", pDrawable,
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exaDrawableLocation(pDrawable), pGC->lineWidth, nsegInit));
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if (pGC->lineWidth == 0) {
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exaPrepareAccess (pDrawable, EXA_PREPARE_DEST);
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exaPrepareAccessGC (pGC);
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fbPolySegment (pDrawable, pGC, nsegInit, pSegInit);
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exaFinishAccessGC (pGC);
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exaFinishAccess (pDrawable, EXA_PREPARE_DEST);
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return;
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}
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/* fb calls mi functions in the lineWidth != 0 case. */
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fbPolySegment (pDrawable, pGC, nsegInit, pSegInit);
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}
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void
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ExaCheckPolyArc (DrawablePtr pDrawable, GCPtr pGC,
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int narcs, xArc *pArcs)
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{
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EXA_FALLBACK(("to %p (%c)\n", pDrawable, exaDrawableLocation(pDrawable)));
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if (pGC->lineWidth == 0)
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{
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exaPrepareAccess (pDrawable, EXA_PREPARE_DEST);
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exaPrepareAccessGC (pGC);
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fbPolyArc (pDrawable, pGC, narcs, pArcs);
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exaFinishAccessGC (pGC);
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exaFinishAccess (pDrawable, EXA_PREPARE_DEST);
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return;
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}
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miPolyArc (pDrawable, pGC, narcs, pArcs);
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}
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void
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ExaCheckPolyFillRect (DrawablePtr pDrawable, GCPtr pGC,
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int nrect, xRectangle *prect)
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{
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EXA_FALLBACK(("to %p (%c)\n", pDrawable, exaDrawableLocation(pDrawable)));
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exaPrepareAccess (pDrawable, EXA_PREPARE_DEST);
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exaPrepareAccessGC (pGC);
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fbPolyFillRect (pDrawable, pGC, nrect, prect);
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exaFinishAccessGC (pGC);
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exaFinishAccess (pDrawable, EXA_PREPARE_DEST);
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}
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void
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ExaCheckImageGlyphBlt (DrawablePtr pDrawable, GCPtr pGC,
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int x, int y, unsigned int nglyph,
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CharInfoPtr *ppci, pointer pglyphBase)
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{
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EXA_FALLBACK(("to %p (%c)\n", pDrawable,
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exaDrawableLocation(pDrawable)));
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exaPrepareAccess (pDrawable, EXA_PREPARE_DEST);
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exaPrepareAccessGC (pGC);
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fbImageGlyphBlt (pDrawable, pGC, x, y, nglyph, ppci, pglyphBase);
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exaFinishAccessGC (pGC);
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exaFinishAccess (pDrawable, EXA_PREPARE_DEST);
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}
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void
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ExaCheckPolyGlyphBlt (DrawablePtr pDrawable, GCPtr pGC,
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int x, int y, unsigned int nglyph,
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CharInfoPtr *ppci, pointer pglyphBase)
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{
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EXA_FALLBACK(("to %p (%c), style %d alu %d\n", pDrawable,
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exaDrawableLocation(pDrawable), pGC->fillStyle, pGC->alu));
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exaPrepareAccess (pDrawable, EXA_PREPARE_DEST);
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exaPrepareAccessGC (pGC);
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fbPolyGlyphBlt (pDrawable, pGC, x, y, nglyph, ppci, pglyphBase);
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exaFinishAccessGC (pGC);
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exaFinishAccess (pDrawable, EXA_PREPARE_DEST);
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}
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void
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ExaCheckPushPixels (GCPtr pGC, PixmapPtr pBitmap,
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DrawablePtr pDrawable,
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int w, int h, int x, int y)
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{
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EXA_FALLBACK(("from %p to %p (%c,%c)\n", pBitmap, pDrawable,
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exaDrawableLocation(&pBitmap->drawable),
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exaDrawableLocation(pDrawable)));
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exaPrepareAccess (pDrawable, EXA_PREPARE_DEST);
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exaPrepareAccessGC (pGC);
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fbPushPixels (pGC, pBitmap, pDrawable, w, h, x, y);
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exaFinishAccessGC (pGC);
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exaFinishAccess (pDrawable, EXA_PREPARE_DEST);
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}
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void
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ExaCheckGetImage (DrawablePtr pDrawable,
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int x, int y, int w, int h,
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unsigned int format, unsigned long planeMask,
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char *d)
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{
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EXA_FALLBACK(("from %p (%c)\n", pDrawable,
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exaDrawableLocation(pDrawable)));
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exaPrepareAccess (pDrawable, EXA_PREPARE_SRC);
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fbGetImage (pDrawable, x, y, w, h, format, planeMask, d);
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exaFinishAccess (pDrawable, EXA_PREPARE_SRC);
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}
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void
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ExaCheckGetSpans (DrawablePtr pDrawable,
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int wMax,
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DDXPointPtr ppt,
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int *pwidth,
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int nspans,
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char *pdstStart)
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{
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EXA_FALLBACK(("from %p (%c)\n", pDrawable, exaDrawableLocation(pDrawable)));
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exaPrepareAccess (pDrawable, EXA_PREPARE_SRC);
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fbGetSpans (pDrawable, wMax, ppt, pwidth, nspans, pdstStart);
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exaFinishAccess (pDrawable, EXA_PREPARE_SRC);
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}
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void
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ExaCheckSaveAreas (PixmapPtr pPixmap,
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RegionPtr prgnSave,
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int xorg,
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int yorg,
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WindowPtr pWin)
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{
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EXA_FALLBACK(("from %p (%c)\n", &pPixmap->drawable,
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exaDrawableLocation(&pPixmap->drawable)));
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exaPrepareAccess ((DrawablePtr)pPixmap, EXA_PREPARE_DEST);
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fbSaveAreas (pPixmap, prgnSave, xorg, yorg, pWin);
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exaFinishAccess ((DrawablePtr)pPixmap, EXA_PREPARE_DEST);
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}
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void
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ExaCheckRestoreAreas (PixmapPtr pPixmap,
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RegionPtr prgnSave,
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int xorg,
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int yorg,
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WindowPtr pWin)
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{
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EXA_FALLBACK(("to %p (%c)\n", &pPixmap->drawable,
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exaDrawableLocation(&pPixmap->drawable)));
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exaPrepareAccess ((DrawablePtr)pPixmap, EXA_PREPARE_DEST);
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fbRestoreAreas (pPixmap, prgnSave, xorg, yorg, pWin);
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exaFinishAccess ((DrawablePtr)pPixmap, EXA_PREPARE_DEST);
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}
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/* XXX: Note the lack of a prepare on the tile, if the window has a tiled
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* background. This function happens to only be called if pExaScr->swappedOut,
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* so we actually end up not having to do it since the tile won't be in fb.
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* That doesn't make this not dirty, though.
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*/
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void
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ExaCheckPaintWindow (WindowPtr pWin, RegionPtr pRegion, int what)
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{
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EXA_FALLBACK(("from %p (%c)\n", pWin,
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exaDrawableLocation(&pWin->drawable)));
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exaPrepareAccess (&pWin->drawable, EXA_PREPARE_DEST);
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fbPaintWindow (pWin, pRegion, what);
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exaFinishAccess (&pWin->drawable, EXA_PREPARE_DEST);
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}
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void
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ExaCheckComposite (CARD8 op,
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PicturePtr pSrc,
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PicturePtr pMask,
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PicturePtr pDst,
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INT16 xSrc,
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INT16 ySrc,
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INT16 xMask,
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INT16 yMask,
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INT16 xDst,
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INT16 yDst,
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CARD16 width,
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CARD16 height)
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{
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EXA_FALLBACK(("from picts %p/%p to pict %p\n",
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pSrc, pMask, pDst));
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exaPrepareAccess (pDst->pDrawable, EXA_PREPARE_DEST);
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if (pSrc->pDrawable != NULL)
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exaPrepareAccess (pSrc->pDrawable, EXA_PREPARE_SRC);
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if (pMask && pMask->pDrawable != NULL)
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exaPrepareAccess (pMask->pDrawable, EXA_PREPARE_MASK);
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fbComposite (op,
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pSrc,
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pMask,
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pDst,
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xSrc,
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ySrc,
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xMask,
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yMask,
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xDst,
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yDst,
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width,
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height);
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if (pMask && pMask->pDrawable != NULL)
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exaFinishAccess (pMask->pDrawable, EXA_PREPARE_MASK);
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if (pSrc->pDrawable != NULL)
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exaFinishAccess (pSrc->pDrawable, EXA_PREPARE_SRC);
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exaFinishAccess (pDst->pDrawable, EXA_PREPARE_DEST);
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}
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/**
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* Gets the 0,0 pixel of a pixmap. Used for doing solid fills of tiled pixmaps
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* that happen to be 1x1. Pixmap must be at least 8bpp.
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*
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* XXX This really belongs in fb, so it can be aware of tiling and etc.
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*/
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CARD32
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exaGetPixmapFirstPixel (PixmapPtr pPixmap)
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{
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CARD32 pixel;
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void *fb;
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Bool need_finish = FALSE;
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BoxRec box;
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ExaMigrationRec pixmaps[1];
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ExaPixmapPriv (pPixmap);
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fb = pExaPixmap->sys_ptr;
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/* Try to avoid framebuffer readbacks */
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if (exaPixmapIsOffscreen(pPixmap) &&
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miPointInRegion(DamageRegion(pExaPixmap->pDamage), 0, 0, &box))
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{
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need_finish = TRUE;
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pixmaps[0].as_dst = FALSE;
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pixmaps[0].as_src = TRUE;
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pixmaps[0].pPix = pPixmap;
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exaDoMigration (pixmaps, 1, FALSE);
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exaPrepareAccess(&pPixmap->drawable, EXA_PREPARE_SRC);
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fb = pPixmap->devPrivate.ptr;
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}
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switch (pPixmap->drawable.bitsPerPixel) {
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case 32:
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pixel = *(CARD32 *)fb;
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break;
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case 16:
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pixel = *(CARD16 *)fb;
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break;
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default:
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pixel = *(CARD8 *)fb;
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break;
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}
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if (need_finish)
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exaFinishAccess(&pPixmap->drawable, EXA_PREPARE_SRC);
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return pixel;
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}
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