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-rw-r--r--xorg-server/composite/compinit.c788
1 files changed, 394 insertions, 394 deletions
diff --git a/xorg-server/composite/compinit.c b/xorg-server/composite/compinit.c
index e8b563de6..9a99ce633 100644
--- a/xorg-server/composite/compinit.c
+++ b/xorg-server/composite/compinit.c
@@ -1,394 +1,394 @@
-/*
- * Copyright © 2006 Sun Microsystems, Inc. All rights reserved.
- *
- * 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 (including the next
- * paragraph) 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 AUTHORS OR COPYRIGHT HOLDERS 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.
- *
- * Copyright © 2003 Keith Packard
- *
- * Permission to use, copy, modify, distribute, and sell this software and its
- * documentation for any purpose is hereby granted without fee, provided that
- * the above copyright notice appear in all copies and that both that
- * copyright notice and this permission notice appear in supporting
- * documentation, and that the name of Keith Packard not be used in
- * advertising or publicity pertaining to distribution of the software without
- * specific, written prior permission. Keith Packard makes no
- * representations about the suitability of this software for any purpose. It
- * is provided "as is" without express or implied warranty.
- *
- * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
- * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
- * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
- * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
- * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
- * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- * PERFORMANCE OF THIS SOFTWARE.
- */
-
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
-#include "compint.h"
-#include "compositeext.h"
-
-static int CompScreenPrivateKeyIndex;
-DevPrivateKey CompScreenPrivateKey = &CompScreenPrivateKeyIndex;
-static int CompWindowPrivateKeyIndex;
-DevPrivateKey CompWindowPrivateKey = &CompWindowPrivateKeyIndex;
-static int CompSubwindowsPrivateKeyIndex;
-DevPrivateKey CompSubwindowsPrivateKey = &CompSubwindowsPrivateKeyIndex;
-
-
-static Bool
-compCloseScreen (int index, ScreenPtr pScreen)
-{
- CompScreenPtr cs = GetCompScreen (pScreen);
- Bool ret;
-
- xfree (cs->alternateVisuals);
-
- pScreen->CloseScreen = cs->CloseScreen;
- pScreen->BlockHandler = cs->BlockHandler;
- pScreen->InstallColormap = cs->InstallColormap;
- pScreen->ChangeWindowAttributes = cs->ChangeWindowAttributes;
- pScreen->ReparentWindow = cs->ReparentWindow;
- pScreen->MoveWindow = cs->MoveWindow;
- pScreen->ResizeWindow = cs->ResizeWindow;
- pScreen->ChangeBorderWidth = cs->ChangeBorderWidth;
-
- pScreen->ClipNotify = cs->ClipNotify;
- pScreen->UnrealizeWindow = cs->UnrealizeWindow;
- pScreen->RealizeWindow = cs->RealizeWindow;
- pScreen->DestroyWindow = cs->DestroyWindow;
- pScreen->CreateWindow = cs->CreateWindow;
- pScreen->CopyWindow = cs->CopyWindow;
- pScreen->PositionWindow = cs->PositionWindow;
-
- xfree (cs);
- dixSetPrivate(&pScreen->devPrivates, CompScreenPrivateKey, NULL);
- ret = (*pScreen->CloseScreen) (index, pScreen);
-
- return ret;
-}
-
-static void
-compInstallColormap (ColormapPtr pColormap)
-{
- VisualPtr pVisual = pColormap->pVisual;
- ScreenPtr pScreen = pColormap->pScreen;
- CompScreenPtr cs = GetCompScreen (pScreen);
- int a;
-
- for (a = 0; a < cs->numAlternateVisuals; a++)
- if (pVisual->vid == cs->alternateVisuals[a])
- return;
- pScreen->InstallColormap = cs->InstallColormap;
- (*pScreen->InstallColormap) (pColormap);
- cs->InstallColormap = pScreen->InstallColormap;
- pScreen->InstallColormap = compInstallColormap;
-}
-
-/* Fake backing store via automatic redirection */
-static Bool
-compChangeWindowAttributes(WindowPtr pWin, unsigned long mask)
-{
- ScreenPtr pScreen = pWin->drawable.pScreen;
- CompScreenPtr cs = GetCompScreen (pScreen);
- Bool ret;
-
- pScreen->ChangeWindowAttributes = cs->ChangeWindowAttributes;
- ret = pScreen->ChangeWindowAttributes(pWin, mask);
-
- if (ret && (mask & CWBackingStore) &&
- pScreen->backingStoreSupport != NotUseful) {
- if (pWin->backingStore != NotUseful) {
- compRedirectWindow(serverClient, pWin, CompositeRedirectAutomatic);
- pWin->backStorage = (pointer) (intptr_t) 1;
- } else {
- compUnredirectWindow(serverClient, pWin,
- CompositeRedirectAutomatic);
- pWin->backStorage = NULL;
- }
- }
-
- pScreen->ChangeWindowAttributes = compChangeWindowAttributes;
-
- return ret;
-}
-
-static void
-compScreenUpdate (ScreenPtr pScreen)
-{
- CompScreenPtr cs = GetCompScreen (pScreen);
-
- compCheckTree (pScreen);
- if (cs->damaged)
- {
- compWindowUpdate (WindowTable[pScreen->myNum]);
- cs->damaged = FALSE;
- }
-}
-
-static void
-compBlockHandler (int i,
- pointer blockData,
- pointer pTimeout,
- pointer pReadmask)
-{
- ScreenPtr pScreen = screenInfo.screens[i];
- CompScreenPtr cs = GetCompScreen (pScreen);
-
- pScreen->BlockHandler = cs->BlockHandler;
- compScreenUpdate (pScreen);
- (*pScreen->BlockHandler) (i, blockData, pTimeout, pReadmask);
- cs->BlockHandler = pScreen->BlockHandler;
- pScreen->BlockHandler = compBlockHandler;
-}
-
-/*
- * Add alternate visuals -- always expose an ARGB32 and RGB24 visual
- */
-
-static DepthPtr
-compFindVisuallessDepth (ScreenPtr pScreen, int d)
-{
- int i;
-
- for (i = 0; i < pScreen->numDepths; i++)
- {
- DepthPtr depth = &pScreen->allowedDepths[i];
- if (depth->depth == d)
- {
- /*
- * Make sure it doesn't have visuals already
- */
- if (depth->numVids)
- return 0;
- /*
- * looks fine
- */
- return depth;
- }
- }
- /*
- * If there isn't one, then it's gonna be hard to have
- * an associated visual
- */
- return 0;
-}
-
-/*
- * Add a list of visual IDs to the list of visuals to implicitly redirect.
- */
-static Bool
-compRegisterAlternateVisuals (CompScreenPtr cs, VisualID *vids, int nVisuals)
-{
- VisualID *p;
-
- p = xrealloc(cs->alternateVisuals,
- sizeof(VisualID) * (cs->numAlternateVisuals + nVisuals));
- if(p == NULL)
- return FALSE;
-
- memcpy(&p[cs->numAlternateVisuals], vids, sizeof(VisualID) * nVisuals);
-
- cs->alternateVisuals = p;
- cs->numAlternateVisuals += nVisuals;
-
- return TRUE;
-}
-
-Bool CompositeRegisterAlternateVisuals (ScreenPtr pScreen, VisualID *vids,
- int nVisuals)
-{
- CompScreenPtr cs = GetCompScreen (pScreen);
- return compRegisterAlternateVisuals(cs, vids, nVisuals);
-}
-
-typedef struct _alternateVisual {
- int depth;
- CARD32 format;
-} CompAlternateVisual;
-
-static CompAlternateVisual altVisuals[] = {
-#if COMP_INCLUDE_RGB24_VISUAL
- { 24, PICT_r8g8b8 },
-#endif
- { 32, PICT_a8r8g8b8 },
-};
-
-static const int NUM_COMP_ALTERNATE_VISUALS = sizeof(altVisuals) /
- sizeof(CompAlternateVisual);
-
-static Bool
-compAddAlternateVisual(ScreenPtr pScreen, CompScreenPtr cs,
- CompAlternateVisual *alt)
-{
- VisualPtr visual;
- DepthPtr depth;
- PictFormatPtr pPictFormat;
- unsigned long alphaMask;
-
- /*
- * The ARGB32 visual is always available. Other alternate depth visuals
- * are only provided if their depth is less than the root window depth.
- * There's no deep reason for this.
- */
- if (alt->depth >= pScreen->rootDepth && alt->depth != 32)
- return FALSE;
-
- depth = compFindVisuallessDepth (pScreen, alt->depth);
- if (!depth)
- /* alt->depth doesn't exist or already has alternate visuals. */
- return TRUE;
-
- pPictFormat = PictureMatchFormat (pScreen, alt->depth, alt->format);
- if (!pPictFormat)
- return FALSE;
-
- if (ResizeVisualArray(pScreen, 1, depth) == FALSE) {
- return FALSE;
- }
-
- visual = pScreen->visuals + (pScreen->numVisuals - 1); /* the new one */
-
- /* Initialize the visual */
- visual->bitsPerRGBValue = 8;
- if (PICT_FORMAT_TYPE(alt->format) == PICT_TYPE_COLOR) {
- visual->class = PseudoColor;
- visual->nplanes = PICT_FORMAT_BPP(alt->format);
- visual->ColormapEntries = 1 << visual->nplanes;
- } else {
- DirectFormatRec *direct = &pPictFormat->direct;
- visual->class = TrueColor;
- visual->redMask = ((unsigned long)direct->redMask) << direct->red;
- visual->greenMask = ((unsigned long)direct->greenMask) << direct->green;
- visual->blueMask = ((unsigned long)direct->blueMask) << direct->blue;
- alphaMask = ((unsigned long)direct->alphaMask) << direct->alpha;
- visual->offsetRed = direct->red;
- visual->offsetGreen = direct->green;
- visual->offsetBlue = direct->blue;
- /*
- * Include A bits in this (unlike GLX which includes only RGB)
- * This lets DIX compute suitable masks for colormap allocations
- */
- visual->nplanes = Ones (visual->redMask |
- visual->greenMask |
- visual->blueMask |
- alphaMask);
- /* find widest component */
- visual->ColormapEntries = (1 << max (Ones (visual->redMask),
- max (Ones (visual->greenMask),
- Ones (visual->blueMask))));
- }
-
- /* remember the visual ID to detect auto-update windows */
- compRegisterAlternateVisuals(cs, &visual->vid, 1);
-
- return TRUE;
-}
-
-static Bool
-compAddAlternateVisuals (ScreenPtr pScreen, CompScreenPtr cs)
-{
- int alt, ret = 0;
-
- for (alt = 0; alt < NUM_COMP_ALTERNATE_VISUALS; alt++)
- ret |= compAddAlternateVisual(pScreen, cs, altVisuals + alt);
-
- return !!ret;
-}
-
-Bool
-compScreenInit (ScreenPtr pScreen)
-{
- CompScreenPtr cs;
-
- if (GetCompScreen (pScreen))
- return TRUE;
- cs = (CompScreenPtr) xalloc (sizeof (CompScreenRec));
- if (!cs)
- return FALSE;
-
- cs->damaged = FALSE;
- cs->overlayWid = FakeClientID(0);
- cs->pOverlayWin = NULL;
- cs->pOverlayClients = NULL;
-
- cs->numAlternateVisuals = 0;
- cs->alternateVisuals = NULL;
-
- if (!compAddAlternateVisuals (pScreen, cs))
- {
- xfree (cs);
- return FALSE;
- }
-
- cs->PositionWindow = pScreen->PositionWindow;
- pScreen->PositionWindow = compPositionWindow;
-
- cs->CopyWindow = pScreen->CopyWindow;
- pScreen->CopyWindow = compCopyWindow;
-
- cs->CreateWindow = pScreen->CreateWindow;
- pScreen->CreateWindow = compCreateWindow;
-
- cs->DestroyWindow = pScreen->DestroyWindow;
- pScreen->DestroyWindow = compDestroyWindow;
-
- cs->RealizeWindow = pScreen->RealizeWindow;
- pScreen->RealizeWindow = compRealizeWindow;
-
- cs->UnrealizeWindow = pScreen->UnrealizeWindow;
- pScreen->UnrealizeWindow = compUnrealizeWindow;
-
- cs->ClipNotify = pScreen->ClipNotify;
- pScreen->ClipNotify = compClipNotify;
-
- cs->MoveWindow = pScreen->MoveWindow;
- pScreen->MoveWindow = compMoveWindow;
-
- cs->ResizeWindow = pScreen->ResizeWindow;
- pScreen->ResizeWindow = compResizeWindow;
-
- cs->ChangeBorderWidth = pScreen->ChangeBorderWidth;
- pScreen->ChangeBorderWidth = compChangeBorderWidth;
-
- cs->ReparentWindow = pScreen->ReparentWindow;
- pScreen->ReparentWindow = compReparentWindow;
-
- cs->InstallColormap = pScreen->InstallColormap;
- pScreen->InstallColormap = compInstallColormap;
-
- cs->ChangeWindowAttributes = pScreen->ChangeWindowAttributes;
- pScreen->ChangeWindowAttributes = compChangeWindowAttributes;
-
- cs->BlockHandler = pScreen->BlockHandler;
- pScreen->BlockHandler = compBlockHandler;
-
- cs->CloseScreen = pScreen->CloseScreen;
- pScreen->CloseScreen = compCloseScreen;
-
- dixSetPrivate(&pScreen->devPrivates, CompScreenPrivateKey, cs);
-
- RegisterRealChildHeadProc(CompositeRealChildHead);
-
- return TRUE;
-}
+/*
+ * Copyright © 2006 Sun Microsystems, Inc. All rights reserved.
+ *
+ * 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 (including the next
+ * paragraph) 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 AUTHORS OR COPYRIGHT HOLDERS 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.
+ *
+ * Copyright © 2003 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission. Keith Packard makes no
+ * representations about the suitability of this software for any purpose. It
+ * is provided "as is" without express or implied warranty.
+ *
+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include "compint.h"
+#include "compositeext.h"
+
+static int CompScreenPrivateKeyIndex;
+DevPrivateKey CompScreenPrivateKey = &CompScreenPrivateKeyIndex;
+static int CompWindowPrivateKeyIndex;
+DevPrivateKey CompWindowPrivateKey = &CompWindowPrivateKeyIndex;
+static int CompSubwindowsPrivateKeyIndex;
+DevPrivateKey CompSubwindowsPrivateKey = &CompSubwindowsPrivateKeyIndex;
+
+
+static Bool
+compCloseScreen (int index, ScreenPtr pScreen)
+{
+ CompScreenPtr cs = GetCompScreen (pScreen);
+ Bool ret;
+
+ free(cs->alternateVisuals);
+
+ pScreen->CloseScreen = cs->CloseScreen;
+ pScreen->BlockHandler = cs->BlockHandler;
+ pScreen->InstallColormap = cs->InstallColormap;
+ pScreen->ChangeWindowAttributes = cs->ChangeWindowAttributes;
+ pScreen->ReparentWindow = cs->ReparentWindow;
+ pScreen->MoveWindow = cs->MoveWindow;
+ pScreen->ResizeWindow = cs->ResizeWindow;
+ pScreen->ChangeBorderWidth = cs->ChangeBorderWidth;
+
+ pScreen->ClipNotify = cs->ClipNotify;
+ pScreen->UnrealizeWindow = cs->UnrealizeWindow;
+ pScreen->RealizeWindow = cs->RealizeWindow;
+ pScreen->DestroyWindow = cs->DestroyWindow;
+ pScreen->CreateWindow = cs->CreateWindow;
+ pScreen->CopyWindow = cs->CopyWindow;
+ pScreen->PositionWindow = cs->PositionWindow;
+
+ free(cs);
+ dixSetPrivate(&pScreen->devPrivates, CompScreenPrivateKey, NULL);
+ ret = (*pScreen->CloseScreen) (index, pScreen);
+
+ return ret;
+}
+
+static void
+compInstallColormap (ColormapPtr pColormap)
+{
+ VisualPtr pVisual = pColormap->pVisual;
+ ScreenPtr pScreen = pColormap->pScreen;
+ CompScreenPtr cs = GetCompScreen (pScreen);
+ int a;
+
+ for (a = 0; a < cs->numAlternateVisuals; a++)
+ if (pVisual->vid == cs->alternateVisuals[a])
+ return;
+ pScreen->InstallColormap = cs->InstallColormap;
+ (*pScreen->InstallColormap) (pColormap);
+ cs->InstallColormap = pScreen->InstallColormap;
+ pScreen->InstallColormap = compInstallColormap;
+}
+
+/* Fake backing store via automatic redirection */
+static Bool
+compChangeWindowAttributes(WindowPtr pWin, unsigned long mask)
+{
+ ScreenPtr pScreen = pWin->drawable.pScreen;
+ CompScreenPtr cs = GetCompScreen (pScreen);
+ Bool ret;
+
+ pScreen->ChangeWindowAttributes = cs->ChangeWindowAttributes;
+ ret = pScreen->ChangeWindowAttributes(pWin, mask);
+
+ if (ret && (mask & CWBackingStore) &&
+ pScreen->backingStoreSupport != NotUseful) {
+ if (pWin->backingStore != NotUseful) {
+ compRedirectWindow(serverClient, pWin, CompositeRedirectAutomatic);
+ pWin->backStorage = (pointer) (intptr_t) 1;
+ } else {
+ compUnredirectWindow(serverClient, pWin,
+ CompositeRedirectAutomatic);
+ pWin->backStorage = NULL;
+ }
+ }
+
+ pScreen->ChangeWindowAttributes = compChangeWindowAttributes;
+
+ return ret;
+}
+
+static void
+compScreenUpdate (ScreenPtr pScreen)
+{
+ CompScreenPtr cs = GetCompScreen (pScreen);
+
+ compCheckTree (pScreen);
+ if (cs->damaged)
+ {
+ compWindowUpdate (WindowTable[pScreen->myNum]);
+ cs->damaged = FALSE;
+ }
+}
+
+static void
+compBlockHandler (int i,
+ pointer blockData,
+ pointer pTimeout,
+ pointer pReadmask)
+{
+ ScreenPtr pScreen = screenInfo.screens[i];
+ CompScreenPtr cs = GetCompScreen (pScreen);
+
+ pScreen->BlockHandler = cs->BlockHandler;
+ compScreenUpdate (pScreen);
+ (*pScreen->BlockHandler) (i, blockData, pTimeout, pReadmask);
+ cs->BlockHandler = pScreen->BlockHandler;
+ pScreen->BlockHandler = compBlockHandler;
+}
+
+/*
+ * Add alternate visuals -- always expose an ARGB32 and RGB24 visual
+ */
+
+static DepthPtr
+compFindVisuallessDepth (ScreenPtr pScreen, int d)
+{
+ int i;
+
+ for (i = 0; i < pScreen->numDepths; i++)
+ {
+ DepthPtr depth = &pScreen->allowedDepths[i];
+ if (depth->depth == d)
+ {
+ /*
+ * Make sure it doesn't have visuals already
+ */
+ if (depth->numVids)
+ return 0;
+ /*
+ * looks fine
+ */
+ return depth;
+ }
+ }
+ /*
+ * If there isn't one, then it's gonna be hard to have
+ * an associated visual
+ */
+ return 0;
+}
+
+/*
+ * Add a list of visual IDs to the list of visuals to implicitly redirect.
+ */
+static Bool
+compRegisterAlternateVisuals (CompScreenPtr cs, VisualID *vids, int nVisuals)
+{
+ VisualID *p;
+
+ p = realloc(cs->alternateVisuals,
+ sizeof(VisualID) * (cs->numAlternateVisuals + nVisuals));
+ if(p == NULL)
+ return FALSE;
+
+ memcpy(&p[cs->numAlternateVisuals], vids, sizeof(VisualID) * nVisuals);
+
+ cs->alternateVisuals = p;
+ cs->numAlternateVisuals += nVisuals;
+
+ return TRUE;
+}
+
+Bool CompositeRegisterAlternateVisuals (ScreenPtr pScreen, VisualID *vids,
+ int nVisuals)
+{
+ CompScreenPtr cs = GetCompScreen (pScreen);
+ return compRegisterAlternateVisuals(cs, vids, nVisuals);
+}
+
+typedef struct _alternateVisual {
+ int depth;
+ CARD32 format;
+} CompAlternateVisual;
+
+static CompAlternateVisual altVisuals[] = {
+#if COMP_INCLUDE_RGB24_VISUAL
+ { 24, PICT_r8g8b8 },
+#endif
+ { 32, PICT_a8r8g8b8 },
+};
+
+static const int NUM_COMP_ALTERNATE_VISUALS = sizeof(altVisuals) /
+ sizeof(CompAlternateVisual);
+
+static Bool
+compAddAlternateVisual(ScreenPtr pScreen, CompScreenPtr cs,
+ CompAlternateVisual *alt)
+{
+ VisualPtr visual;
+ DepthPtr depth;
+ PictFormatPtr pPictFormat;
+ unsigned long alphaMask;
+
+ /*
+ * The ARGB32 visual is always available. Other alternate depth visuals
+ * are only provided if their depth is less than the root window depth.
+ * There's no deep reason for this.
+ */
+ if (alt->depth >= pScreen->rootDepth && alt->depth != 32)
+ return FALSE;
+
+ depth = compFindVisuallessDepth (pScreen, alt->depth);
+ if (!depth)
+ /* alt->depth doesn't exist or already has alternate visuals. */
+ return TRUE;
+
+ pPictFormat = PictureMatchFormat (pScreen, alt->depth, alt->format);
+ if (!pPictFormat)
+ return FALSE;
+
+ if (ResizeVisualArray(pScreen, 1, depth) == FALSE) {
+ return FALSE;
+ }
+
+ visual = pScreen->visuals + (pScreen->numVisuals - 1); /* the new one */
+
+ /* Initialize the visual */
+ visual->bitsPerRGBValue = 8;
+ if (PICT_FORMAT_TYPE(alt->format) == PICT_TYPE_COLOR) {
+ visual->class = PseudoColor;
+ visual->nplanes = PICT_FORMAT_BPP(alt->format);
+ visual->ColormapEntries = 1 << visual->nplanes;
+ } else {
+ DirectFormatRec *direct = &pPictFormat->direct;
+ visual->class = TrueColor;
+ visual->redMask = ((unsigned long)direct->redMask) << direct->red;
+ visual->greenMask = ((unsigned long)direct->greenMask) << direct->green;
+ visual->blueMask = ((unsigned long)direct->blueMask) << direct->blue;
+ alphaMask = ((unsigned long)direct->alphaMask) << direct->alpha;
+ visual->offsetRed = direct->red;
+ visual->offsetGreen = direct->green;
+ visual->offsetBlue = direct->blue;
+ /*
+ * Include A bits in this (unlike GLX which includes only RGB)
+ * This lets DIX compute suitable masks for colormap allocations
+ */
+ visual->nplanes = Ones (visual->redMask |
+ visual->greenMask |
+ visual->blueMask |
+ alphaMask);
+ /* find widest component */
+ visual->ColormapEntries = (1 << max (Ones (visual->redMask),
+ max (Ones (visual->greenMask),
+ Ones (visual->blueMask))));
+ }
+
+ /* remember the visual ID to detect auto-update windows */
+ compRegisterAlternateVisuals(cs, &visual->vid, 1);
+
+ return TRUE;
+}
+
+static Bool
+compAddAlternateVisuals (ScreenPtr pScreen, CompScreenPtr cs)
+{
+ int alt, ret = 0;
+
+ for (alt = 0; alt < NUM_COMP_ALTERNATE_VISUALS; alt++)
+ ret |= compAddAlternateVisual(pScreen, cs, altVisuals + alt);
+
+ return !!ret;
+}
+
+Bool
+compScreenInit (ScreenPtr pScreen)
+{
+ CompScreenPtr cs;
+
+ if (GetCompScreen (pScreen))
+ return TRUE;
+ cs = (CompScreenPtr) malloc(sizeof (CompScreenRec));
+ if (!cs)
+ return FALSE;
+
+ cs->damaged = FALSE;
+ cs->overlayWid = FakeClientID(0);
+ cs->pOverlayWin = NULL;
+ cs->pOverlayClients = NULL;
+
+ cs->numAlternateVisuals = 0;
+ cs->alternateVisuals = NULL;
+
+ if (!compAddAlternateVisuals (pScreen, cs))
+ {
+ free(cs);
+ return FALSE;
+ }
+
+ cs->PositionWindow = pScreen->PositionWindow;
+ pScreen->PositionWindow = compPositionWindow;
+
+ cs->CopyWindow = pScreen->CopyWindow;
+ pScreen->CopyWindow = compCopyWindow;
+
+ cs->CreateWindow = pScreen->CreateWindow;
+ pScreen->CreateWindow = compCreateWindow;
+
+ cs->DestroyWindow = pScreen->DestroyWindow;
+ pScreen->DestroyWindow = compDestroyWindow;
+
+ cs->RealizeWindow = pScreen->RealizeWindow;
+ pScreen->RealizeWindow = compRealizeWindow;
+
+ cs->UnrealizeWindow = pScreen->UnrealizeWindow;
+ pScreen->UnrealizeWindow = compUnrealizeWindow;
+
+ cs->ClipNotify = pScreen->ClipNotify;
+ pScreen->ClipNotify = compClipNotify;
+
+ cs->MoveWindow = pScreen->MoveWindow;
+ pScreen->MoveWindow = compMoveWindow;
+
+ cs->ResizeWindow = pScreen->ResizeWindow;
+ pScreen->ResizeWindow = compResizeWindow;
+
+ cs->ChangeBorderWidth = pScreen->ChangeBorderWidth;
+ pScreen->ChangeBorderWidth = compChangeBorderWidth;
+
+ cs->ReparentWindow = pScreen->ReparentWindow;
+ pScreen->ReparentWindow = compReparentWindow;
+
+ cs->InstallColormap = pScreen->InstallColormap;
+ pScreen->InstallColormap = compInstallColormap;
+
+ cs->ChangeWindowAttributes = pScreen->ChangeWindowAttributes;
+ pScreen->ChangeWindowAttributes = compChangeWindowAttributes;
+
+ cs->BlockHandler = pScreen->BlockHandler;
+ pScreen->BlockHandler = compBlockHandler;
+
+ cs->CloseScreen = pScreen->CloseScreen;
+ pScreen->CloseScreen = compCloseScreen;
+
+ dixSetPrivate(&pScreen->devPrivates, CompScreenPrivateKey, cs);
+
+ RegisterRealChildHeadProc(CompositeRealChildHead);
+
+ return TRUE;
+}