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-rw-r--r--miext/layer/layerwin.c483
1 files changed, 483 insertions, 0 deletions
diff --git a/miext/layer/layerwin.c b/miext/layer/layerwin.c
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+++ b/miext/layer/layerwin.c
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+/*
+ * $XFree86: xc/programs/Xserver/miext/layer/layerwin.c,v 1.7 2002/11/08 22:19:42 keithp Exp $
+ *
+ * Copyright © 2001 Keith Packard, member of The XFree86 Project, Inc.
+ *
+ * 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.
+ */
+
+#include "layerstr.h"
+
+static LayerListPtr
+NewLayerList (ScreenPtr pScreen, LayerPtr pLayer)
+{
+ LayerListPtr pLayList;
+
+ pLayList = (LayerListPtr) xalloc (sizeof (LayerListRec));
+ if (!pLayList)
+ return 0;
+ pLayList->pNext = 0;
+ pLayList->pLayer = pLayer;
+ pLayList->inheritClip = TRUE;
+ REGION_INIT (pScreen, &pLayList->clipList, NullBox, 0);
+ REGION_INIT (pScreen, &pLayList->borderClip, NullBox, 0);
+ return pLayList;
+}
+
+static void
+FreeLayerList (ScreenPtr pScreen, LayerListPtr pLayList)
+{
+ REGION_UNINIT (&pScreen, &pLayList->clipList);
+ REGION_UNINIT (&pScreen, &pLayList->borderClip);
+ xfree (pLayList);
+}
+
+/*
+ * Create pixmap for a layer
+ */
+
+Bool
+LayerCreatePixmap (ScreenPtr pScreen, LayerPtr pLayer)
+{
+ LayerKindPtr pKind = pLayer->pKind;
+
+ LayerUnwrap (pScreen, pKind, CreatePixmap);
+ /* XXX create full-screen sized layers all around */
+ pLayer->pPixmap = (*pScreen->CreatePixmap) (pScreen, pScreen->width,
+ pScreen->height, pLayer->depth);
+ LayerWrap (pScreen, pKind, CreatePixmap, layerCreatePixmap);
+ if (!pLayer->pPixmap)
+ return FALSE;
+ if (pLayer->pKind->kind == LAYER_SHADOW)
+ {
+ if (!shadowAdd (pScreen, pLayer->pPixmap, pLayer->update,
+ pLayer->window, pLayer->randr,
+ pLayer->closure))
+ return FALSE;
+ }
+ return TRUE;
+}
+
+/*
+ * Destroy pixmap for a layer
+ */
+
+void
+LayerDestroyPixmap (ScreenPtr pScreen, LayerPtr pLayer)
+{
+ if (pLayer->pPixmap)
+ {
+ if (pLayer->pKind->kind == LAYER_SHADOW)
+ shadowRemove (pScreen, pLayer->pPixmap);
+ if (pLayer->freePixmap)
+ {
+ LayerKindPtr pKind = pLayer->pKind;
+
+ LayerUnwrap (pScreen, pKind, DestroyPixmap);
+ (*pScreen->DestroyPixmap) (pLayer->pPixmap);
+ LayerWrap (pScreen, pKind, DestroyPixmap, layerDestroyPixmap);
+ }
+ pLayer->pPixmap = 0;
+ }
+}
+
+/*
+ * Add a window to a layer
+ */
+Bool
+LayerWindowAdd (ScreenPtr pScreen, LayerPtr pLayer, WindowPtr pWin)
+{
+ layerWinPriv(pWin);
+
+ if (pLayer->pPixmap == LAYER_SCREEN_PIXMAP)
+ pLayer->pPixmap = (*pScreen->GetScreenPixmap) (pScreen);
+ else if (!pLayer->pPixmap && !LayerCreatePixmap (pScreen, pLayer))
+ return FALSE;
+ /*
+ * Add a new layer list if needed
+ */
+ if (pLayWin->isList || pLayWin->u.pLayer)
+ {
+ LayerListPtr pPrev;
+ LayerListPtr pLayList;
+
+ if (!pLayWin->isList)
+ {
+ pPrev = NewLayerList (pScreen, pLayWin->u.pLayer);
+ if (!pPrev)
+ return FALSE;
+ }
+ else
+ {
+ for (pPrev = pLayWin->u.pLayList; pPrev->pNext; pPrev = pPrev->pNext)
+ ;
+ }
+ pLayList = NewLayerList (pScreen, pLayer);
+ if (!pLayList)
+ {
+ if (!pLayWin->isList)
+ FreeLayerList (pScreen, pPrev);
+ return FALSE;
+ }
+ pPrev->pNext = pLayList;
+ if (!pLayWin->isList)
+ {
+ pLayWin->isList = TRUE;
+ pLayWin->u.pLayList = pPrev;
+ }
+ }
+ else
+ pLayWin->u.pLayer = pLayer;
+ /*
+ * XXX only one layer supported for drawing, last one wins
+ */
+ (*pScreen->SetWindowPixmap) (pWin, pLayer->pPixmap);
+ pWin->drawable.serialNumber = NEXT_SERIAL_NUMBER;
+ pLayer->refcnt++;
+ pLayer->windows++;
+ return TRUE;
+}
+
+/*
+ * Remove a window from a layer
+ */
+
+void
+LayerWindowRemove (ScreenPtr pScreen, LayerPtr pLayer, WindowPtr pWin)
+{
+ layerWinPriv(pWin);
+
+ if (pLayWin->isList)
+ {
+ LayerListPtr *pPrev;
+ LayerListPtr pLayList;
+
+ for (pPrev = &pLayWin->u.pLayList; (pLayList = *pPrev); pPrev = &pLayList->pNext)
+ {
+ if (pLayList->pLayer == pLayer)
+ {
+ *pPrev = pLayList->pNext;
+ FreeLayerList (pScreen, pLayList);
+ --pLayer->windows;
+ if (pLayer->windows <= 0)
+ LayerDestroyPixmap (pScreen, pLayer);
+ LayerDestroy (pScreen, pLayer);
+ break;
+ }
+ }
+ pLayList = pLayWin->u.pLayList;
+ if (!pLayList)
+ {
+ /*
+ * List is empty, set isList back to false
+ */
+ pLayWin->isList = FALSE;
+ pLayWin->u.pLayer = 0;
+ }
+ else if (!pLayList->pNext && pLayList->inheritClip)
+ {
+ /*
+ * List contains a single element using the
+ * window clip, free the list structure and
+ * host the layer back to the window private
+ */
+ pLayer = pLayList->pLayer;
+ FreeLayerList (pScreen, pLayList);
+ pLayWin->isList = FALSE;
+ pLayWin->u.pLayer = pLayer;
+ }
+ }
+ else
+ {
+ if (pLayWin->u.pLayer == pLayer)
+ {
+ --pLayer->windows;
+ if (pLayer->windows <= 0)
+ LayerDestroyPixmap (pScreen, pLayer);
+ LayerDestroy (pScreen, pLayer);
+ pLayWin->u.pLayer = 0;
+ }
+ }
+ pWin->drawable.serialNumber = NEXT_SERIAL_NUMBER;
+}
+
+/*
+ * Looping primitives for window layering. Usage:
+ *
+ * for (pLayer = LayerWindowFirst (pWin, &loop);
+ * pLayer;
+ * pLayer = LayerWindowNext (&loop))
+ * {
+ * ...
+ * }
+ * LayerWindowDone (pWin, &loop);
+ */
+
+LayerPtr
+LayerWindowFirst (WindowPtr pWin, LayerWinLoopPtr pLoop)
+{
+ layerWinPriv (pWin);
+
+ pLoop->pLayWin = pLayWin;
+ if (!pLayWin->isList)
+ return pLayWin->u.pLayer;
+
+ /*
+ * Preserve original state
+ */
+ pLoop->clipList = pWin->clipList;
+ pLoop->borderClip = pWin->borderClip;
+ pLoop->pPixmap = (*pWin->drawable.pScreen->GetWindowPixmap) (pWin);
+
+ /*
+ * Set initial list element
+ */
+ pLoop->pLayList = pLayWin->u.pLayList;
+
+ /*
+ * Return first layer
+ */
+ return LayerWindowNext (pWin, pLoop);
+}
+
+LayerPtr
+LayerWindowNext (WindowPtr pWin, LayerWinLoopPtr pLoop)
+{
+ LayerPtr pLayer;
+ LayerWinPtr pLayWin = pLoop->pLayWin;
+ LayerListPtr pLayList;
+
+ if (!pLayWin->isList)
+ return 0;
+
+ pLayList = pLoop->pLayList;
+ pLayer = pLayList->pLayer;
+ /*
+ * Configure window for this layer
+ */
+ (*pWin->drawable.pScreen->SetWindowPixmap) (pWin, pLayer->pPixmap);
+ if (!pLayList->inheritClip)
+ {
+ pWin->clipList = pLayList->clipList;
+ pWin->borderClip = pLayList->borderClip;
+ }
+ /*
+ * Step to next layer list
+ */
+ pLoop->pLayList = pLayList->pNext;
+ /*
+ * Return layer
+ */
+ return pLayer;
+}
+
+void
+LayerWindowDone (WindowPtr pWin, LayerWinLoopPtr pLoop)
+{
+ LayerWinPtr pLayWin = pLoop->pLayWin;
+
+ if (!pLayWin->isList)
+ return;
+ /*
+ * clean up after the loop
+ */
+ pWin->clipList = pLoop->clipList;
+ pWin->borderClip = pLoop->clipList;
+ (*pWin->drawable.pScreen->SetWindowPixmap) (pWin, pLoop->pPixmap);
+}
+
+Bool
+layerCreateWindow (WindowPtr pWin)
+{
+ ScreenPtr pScreen = pWin->drawable.pScreen;
+ layerWinPriv(pWin);
+ layerScrPriv(pScreen);
+ LayerPtr pLayer;
+ Bool ret;
+
+ pLayWin->isList = FALSE;
+ pLayWin->u.pLayer = 0;
+
+ /*
+ * input only windows don't live in any layer
+ */
+ if (pWin->drawable.type == UNDRAWABLE_WINDOW)
+ return TRUE;
+ /*
+ * Use a reasonable default layer -- the first
+ * layer matching the windows depth. Subsystems needing
+ * alternative layering semantics can override this by
+ * replacing this function. Perhaps a new screen function
+ * could be used to select the correct initial window
+ * layer instead.
+ */
+ for (pLayer = pLayScr->pLayers; pLayer; pLayer = pLayer->pNext)
+ if (pLayer->depth == pWin->drawable.depth)
+ break;
+ ret = TRUE;
+ if (pLayer)
+ {
+ pScreen->CreateWindow = pLayer->pKind->CreateWindow;
+ ret = (*pScreen->CreateWindow) (pWin);
+ pLayer->pKind->CreateWindow = pScreen->CreateWindow;
+ pScreen->CreateWindow = layerCreateWindow;
+ LayerWindowAdd (pScreen, pLayer, pWin);
+ }
+ return ret;
+}
+
+Bool
+layerDestroyWindow (WindowPtr pWin)
+{
+ ScreenPtr pScreen = pWin->drawable.pScreen;
+ layerWinPriv(pWin);
+ LayerPtr pLayer;
+ Bool ret = TRUE;
+
+ while ((pLayer = layerWinLayer (pLayWin)))
+ {
+ LayerUnwrap (pScreen, pLayer->pKind, DestroyWindow);
+ ret = (*pScreen->DestroyWindow) (pWin);
+ LayerWrap (pScreen, pLayer->pKind, DestroyWindow, layerDestroyWindow);
+ LayerWindowRemove (pWin->drawable.pScreen, pLayer, pWin);
+ }
+ return ret;
+}
+
+Bool
+layerChangeWindowAttributes (WindowPtr pWin, unsigned long mask)
+{
+ ScreenPtr pScreen = pWin->drawable.pScreen;
+ LayerPtr pLay;
+ LayerWinLoopRec loop;
+ Bool ret = TRUE;
+
+ for (pLay = LayerWindowFirst (pWin, &loop);
+ pLay;
+ pLay = LayerWindowNext (pWin, &loop))
+ {
+ LayerUnwrap(pScreen,pLay->pKind,ChangeWindowAttributes);
+ if (!(*pScreen->ChangeWindowAttributes) (pWin, mask))
+ ret = FALSE;
+ LayerWrap(pScreen,pLay->pKind,ChangeWindowAttributes,layerChangeWindowAttributes);
+ }
+ LayerWindowDone (pWin, &loop);
+ return ret;
+}
+
+void
+layerPaintWindowBackground (WindowPtr pWin, RegionPtr pRegion, int what)
+{
+ ScreenPtr pScreen = pWin->drawable.pScreen;
+ LayerPtr pLay;
+ LayerWinLoopRec loop;
+
+ for (pLay = LayerWindowFirst (pWin, &loop);
+ pLay;
+ pLay = LayerWindowNext (pWin, &loop))
+ {
+ LayerUnwrap(pScreen,pLay->pKind,PaintWindowBackground);
+ (*pScreen->PaintWindowBackground) (pWin, pRegion, what);
+ LayerWrap(pScreen,pLay->pKind,PaintWindowBackground,layerPaintWindowBackground);
+ }
+ LayerWindowDone (pWin, &loop);
+}
+
+void
+layerPaintWindowBorder (WindowPtr pWin, RegionPtr pRegion, int what)
+{
+ ScreenPtr pScreen = pWin->drawable.pScreen;
+ LayerPtr pLay;
+ LayerWinLoopRec loop;
+
+ for (pLay = LayerWindowFirst (pWin, &loop);
+ pLay;
+ pLay = LayerWindowNext (pWin, &loop))
+ {
+ LayerUnwrap(pScreen,pLay->pKind,PaintWindowBorder);
+ (*pScreen->PaintWindowBorder) (pWin, pRegion, what);
+ LayerWrap(pScreen,pLay->pKind,PaintWindowBorder,layerPaintWindowBorder);
+ }
+ LayerWindowDone (pWin, &loop);
+}
+
+void
+layerCopyWindow(WindowPtr pWin, DDXPointRec ptOldOrg, RegionPtr prgnSrc)
+{
+ ScreenPtr pScreen = pWin->drawable.pScreen;
+ LayerPtr pLay;
+ LayerWinLoopRec loop;
+ int dx = 0, dy = 0;
+
+ for (pLay = LayerWindowFirst (pWin, &loop);
+ pLay;
+ pLay = LayerWindowNext (pWin, &loop))
+ {
+ LayerUnwrap(pScreen,pLay->pKind,CopyWindow);
+ /*
+ * Undo the translation done within the last CopyWindow proc (sigh)
+ */
+ if (dx || dy)
+ REGION_TRANSLATE(pWin->drawable.pScreen, prgnSrc, dx, dy);
+ (*pScreen->CopyWindow) (pWin, ptOldOrg, prgnSrc);
+ LayerWrap(pScreen,pLay->pKind,CopyWindow,layerCopyWindow);
+ /*
+ * Save offset to undo translation next time around
+ */
+ dx = ptOldOrg.x - pWin->drawable.x;
+ dy = ptOldOrg.y - pWin->drawable.y;
+ }
+ LayerWindowDone (pWin, &loop);
+}
+
+PixmapPtr
+layerCreatePixmap (ScreenPtr pScreen, int width, int height, int depth)
+{
+ /* XXX assume the first layer can handle all pixmaps */
+ layerScrPriv (pScreen);
+ LayerKindPtr pKind;
+ PixmapPtr pPixmap;
+
+ pKind = &pLayScr->kinds[0];
+ if (pLayScr->pLayers)
+ pKind = pLayScr->pLayers->pKind;
+ LayerUnwrap (pScreen, pKind, CreatePixmap);
+ pPixmap = (*pScreen->CreatePixmap) (pScreen, width, height, depth);
+ LayerWrap (pScreen,pKind,CreatePixmap,layerCreatePixmap);
+ return pPixmap;
+}
+
+Bool
+layerDestroyPixmap (PixmapPtr pPixmap)
+{
+ /* XXX assume the first layer can handle all pixmaps */
+ ScreenPtr pScreen = pPixmap->drawable.pScreen;
+ layerScrPriv (pScreen);
+ LayerKindPtr pKind;
+ Bool ret;
+
+ pKind = &pLayScr->kinds[0];
+ if (pLayScr->pLayers)
+ pKind = pLayScr->pLayers->pKind;
+ LayerUnwrap (pScreen, pKind, DestroyPixmap);
+ ret = (*pScreen->DestroyPixmap) (pPixmap);
+ LayerWrap (pScreen,pKind,DestroyPixmap,layerDestroyPixmap);
+ return ret;
+}
+
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