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https://github.com/X11Libre/xserver.git
synced 2026-03-24 05:54:08 +00:00
c4c5f03cb7
Using calloc() instead of malloc() as preventive measure, so there never can be any hidden bugs or leaks due uninitialized memory. The extra cost of using this compiler intrinsic should be practically impossible to measure - in many cases a good compiler can even deduce if certain areas really don't need to be zero'd (because they're written to right after allocation) and create more efficient machine code. The code pathes in question are pretty cold anyways, so it's probably not worth even thinking about potential extra runtime costs. Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
315 lines
9.8 KiB
C
315 lines
9.8 KiB
C
/*
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*
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* Copyright © 2000 SuSE, Inc.
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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 SuSE not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. SuSE makes no representations about the
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* suitability of this software for any purpose. It is provided "as is"
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* without express or implied warranty.
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*
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* SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE
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* BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Author: Keith Packard, SuSE, Inc.
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*/
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#include <dix-config.h>
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#include <stdlib.h>
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#include "mi/mi_priv.h"
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#include "fb.h"
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#include "fboverlay.h"
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#include "shmint.h"
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static DevPrivateKeyRec fbOverlayScreenPrivateKeyRec;
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#define fbOverlayScreenPrivateKey (&fbOverlayScreenPrivateKeyRec)
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DevPrivateKey
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fbOverlayGetScreenPrivateKey(void)
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{
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return fbOverlayScreenPrivateKey;
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}
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/*
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* Replace this if you want something supporting
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* multiple overlays with the same depth
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*/
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static Bool
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fbOverlayCreateWindow(WindowPtr pWin)
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{
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FbOverlayScrPrivPtr pScrPriv = fbOverlayGetScrPriv(pWin->drawable.pScreen);
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int i;
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PixmapPtr pPixmap;
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if (pWin->drawable.class != InputOutput)
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return TRUE;
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for (i = 0; i < pScrPriv->nlayers; i++) {
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pPixmap = pScrPriv->layer[i].u.run.pixmap;
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if (pWin->drawable.depth == pPixmap->drawable.depth) {
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dixSetPrivate(&pWin->devPrivates, fbGetWinPrivateKey(pWin), pPixmap);
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/*
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* Make sure layer keys are written correctly by
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* having non-root layers set to full while the
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* root layer is set to empty. This will cause
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* all of the layers to get painted when the root
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* is mapped
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*/
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if (!pWin->parent) {
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RegionEmpty(&pScrPriv->layer[i].u.run.region);
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}
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return TRUE;
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}
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}
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return FALSE;
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}
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static Bool
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fbOverlayCloseScreen(ScreenPtr pScreen)
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{
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FbOverlayScrPrivPtr pScrPriv = fbOverlayGetScrPriv(pScreen);
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int i;
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for (i = 0; i < pScrPriv->nlayers; i++) {
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dixDestroyPixmap(pScrPriv->layer[i].u.run.pixmap, 0);
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RegionUninit(&pScrPriv->layer[i].u.run.region);
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}
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return TRUE;
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}
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/*
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* Return layer containing this window
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*/
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static int
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fbOverlayWindowLayer(WindowPtr pWin)
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{
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FbOverlayScrPrivPtr pScrPriv = fbOverlayGetScrPriv(pWin->drawable.pScreen);
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int i;
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for (i = 0; i < pScrPriv->nlayers; i++)
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if (dixLookupPrivate(&pWin->devPrivates, fbGetWinPrivateKey(pWin)) ==
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(void *) pScrPriv->layer[i].u.run.pixmap)
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return i;
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return 0;
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}
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static Bool
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fbOverlayCreateScreenResources(ScreenPtr pScreen)
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{
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int i;
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FbOverlayScrPrivPtr pScrPriv = fbOverlayGetScrPriv(pScreen);
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PixmapPtr pPixmap;
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void *pbits;
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int width;
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int depth;
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BoxRec box;
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if (!miCreateScreenResources(pScreen))
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return FALSE;
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box.x1 = 0;
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box.y1 = 0;
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box.x2 = pScreen->width;
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box.y2 = pScreen->height;
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for (i = 0; i < pScrPriv->nlayers; i++) {
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pbits = pScrPriv->layer[i].u.init.pbits;
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width = pScrPriv->layer[i].u.init.width;
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depth = pScrPriv->layer[i].u.init.depth;
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pPixmap = (*pScreen->CreatePixmap) (pScreen, 0, 0, depth, 0);
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if (!pPixmap)
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return FALSE;
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if (!(*pScreen->ModifyPixmapHeader) (pPixmap, pScreen->width,
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pScreen->height, depth,
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BitsPerPixel(depth),
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PixmapBytePad(width, depth),
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pbits))
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return FALSE;
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pScrPriv->layer[i].u.run.pixmap = pPixmap;
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RegionInit(&pScrPriv->layer[i].u.run.region, &box, 0);
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}
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pScreen->devPrivate = pScrPriv->layer[0].u.run.pixmap;
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return TRUE;
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}
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static void
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fbOverlayPaintKey(DrawablePtr pDrawable,
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RegionPtr pRegion, CARD32 pixel, int layer)
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{
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fbFillRegionSolid(pDrawable, pRegion, 0,
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fbReplicatePixel(pixel, pDrawable->bitsPerPixel));
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}
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/*
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* Track visible region for each layer
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*/
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static void
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fbOverlayUpdateLayerRegion(ScreenPtr pScreen, int layer, RegionPtr prgn)
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{
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FbOverlayScrPrivPtr pScrPriv = fbOverlayGetScrPriv(pScreen);
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int i;
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RegionRec rgnNew;
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if (!prgn || !RegionNotEmpty(prgn))
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return;
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for (i = 0; i < pScrPriv->nlayers; i++) {
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if (i == layer) {
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/* add new piece to this fb */
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RegionUnion(&pScrPriv->layer[i].u.run.region,
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&pScrPriv->layer[i].u.run.region, prgn);
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}
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else if (RegionNotEmpty(&pScrPriv->layer[i].u.run.region)) {
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/* paint new piece with chroma key */
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RegionNull(&rgnNew);
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RegionIntersect(&rgnNew, prgn, &pScrPriv->layer[i].u.run.region);
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(*pScrPriv->PaintKey) (&pScrPriv->layer[i].u.run.pixmap->drawable,
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&rgnNew, pScrPriv->layer[i].key, i);
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RegionUninit(&rgnNew);
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/* remove piece from other fbs */
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RegionSubtract(&pScrPriv->layer[i].u.run.region,
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&pScrPriv->layer[i].u.run.region, prgn);
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}
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}
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}
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/*
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* Copy only areas in each layer containing real bits
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*/
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static void
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fbOverlayCopyWindow(WindowPtr pWin, DDXPointRec ptOldOrg, RegionPtr prgnSrc)
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{
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ScreenPtr pScreen = pWin->drawable.pScreen;
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FbOverlayScrPrivPtr pScrPriv = fbOverlayGetScrPriv(pScreen);
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RegionRec rgnDst;
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int dx, dy;
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int i;
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RegionRec layerRgn[FB_OVERLAY_MAX];
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PixmapPtr pPixmap;
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dx = ptOldOrg.x - pWin->drawable.x;
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dy = ptOldOrg.y - pWin->drawable.y;
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/*
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* Clip to existing bits
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*/
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RegionTranslate(prgnSrc, -dx, -dy);
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RegionNull(&rgnDst);
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RegionIntersect(&rgnDst, &pWin->borderClip, prgnSrc);
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RegionTranslate(&rgnDst, dx, dy);
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/*
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* Compute the portion of each fb affected by this copy
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*/
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for (i = 0; i < pScrPriv->nlayers; i++) {
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RegionNull(&layerRgn[i]);
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RegionIntersect(&layerRgn[i], &rgnDst,
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&pScrPriv->layer[i].u.run.region);
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if (RegionNotEmpty(&layerRgn[i])) {
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RegionTranslate(&layerRgn[i], -dx, -dy);
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pPixmap = pScrPriv->layer[i].u.run.pixmap;
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miCopyRegion(&pPixmap->drawable, &pPixmap->drawable,
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0,
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&layerRgn[i], dx, dy, pScrPriv->CopyWindow, 0,
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(void *) (long) i);
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}
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}
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/*
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* Update regions
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*/
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for (i = 0; i < pScrPriv->nlayers; i++) {
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if (RegionNotEmpty(&layerRgn[i]))
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fbOverlayUpdateLayerRegion(pScreen, i, &layerRgn[i]);
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RegionUninit(&layerRgn[i]);
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}
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RegionUninit(&rgnDst);
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}
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static void
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fbOverlayWindowExposures(WindowPtr pWin, RegionPtr prgn)
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{
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fbOverlayUpdateLayerRegion(pWin->drawable.pScreen,
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fbOverlayWindowLayer(pWin), prgn);
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miWindowExposures(pWin, prgn);
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}
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Bool
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fbOverlayFinishScreenInit(ScreenPtr pScreen,
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void *pbits1,
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void *pbits2,
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int xsize,
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int ysize,
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int dpix,
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int dpiy,
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int width1,
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int width2,
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int bpp1, int bpp2, int depth1, int depth2)
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{
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VisualPtr visuals;
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DepthPtr depths;
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int nvisuals;
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int ndepths;
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VisualID defaultVisual;
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if (!dixRegisterPrivateKey
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(&fbOverlayScreenPrivateKeyRec, PRIVATE_SCREEN, 0))
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return FALSE;
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if (bpp1 == 24 || bpp2 == 24)
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return FALSE;
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FbOverlayScrPrivPtr pScrPriv = calloc(1, sizeof(FbOverlayScrPrivRec));
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if (!pScrPriv)
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return FALSE;
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if (!fbInitVisuals(&visuals, &depths, &nvisuals, &ndepths, &depth1,
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&defaultVisual, ((unsigned long) 1 << (bpp1 - 1)) |
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((unsigned long) 1 << (bpp2 - 1)), 8)) {
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free(pScrPriv);
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return FALSE;
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}
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if (!miScreenInit(pScreen, 0, xsize, ysize, dpix, dpiy, 0,
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depth1, ndepths, depths,
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defaultVisual, nvisuals, visuals)) {
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free(pScrPriv);
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return FALSE;
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}
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/* MI thinks there's no frame buffer */
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#ifdef MITSHM
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ShmRegisterFbFuncs(pScreen);
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#endif
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pScreen->minInstalledCmaps = 1;
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pScreen->maxInstalledCmaps = 2;
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pScrPriv->nlayers = 2;
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pScrPriv->PaintKey = fbOverlayPaintKey;
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pScrPriv->CopyWindow = fbCopyWindowProc;
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pScrPriv->layer[0].u.init.pbits = pbits1;
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pScrPriv->layer[0].u.init.width = width1;
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pScrPriv->layer[0].u.init.depth = depth1;
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pScrPriv->layer[1].u.init.pbits = pbits2;
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pScrPriv->layer[1].u.init.width = width2;
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pScrPriv->layer[1].u.init.depth = depth2;
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dixSetPrivate(&pScreen->devPrivates, fbOverlayScreenPrivateKey, pScrPriv);
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/* overwrite miCloseScreen with our own */
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pScreen->CloseScreen = fbOverlayCloseScreen;
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pScreen->CreateScreenResources = fbOverlayCreateScreenResources;
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pScreen->CreateWindow = fbOverlayCreateWindow;
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pScreen->WindowExposures = fbOverlayWindowExposures;
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pScreen->CopyWindow = fbOverlayCopyWindow;
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return TRUE;
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}
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