635 lines
21 KiB
C
635 lines
21 KiB
C
/******************************************************************************
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*
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* Copyright (c) 1994, 1995 Hewlett-Packard Company
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL HEWLETT-PACKARD COMPANY BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
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* THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* Except as contained in this notice, the name of the Hewlett-Packard
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* Company shall not be used in advertising or otherwise to promote the
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* sale, use or other dealings in this Software without prior written
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* authorization from the Hewlett-Packard Company.
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*
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* Machine-independent DBE code
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*
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*****************************************************************************/
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/* INCLUDES */
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#include <dix-config.h>
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#include <X11/X.h>
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#include <X11/Xproto.h>
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#include "misc.h"
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#include "os.h"
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#include "windowstr.h"
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#include "scrnintstr.h"
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#include "pixmapstr.h"
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#include "extnsionst.h"
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#include "dixstruct.h"
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#include "resource.h"
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#include "opaque.h"
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#include "dbestruct.h"
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#include "regionstr.h"
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#include "gcstruct.h"
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#include "inputstr.h"
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#include "midbe.h"
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#include "xace.h"
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#include <stdio.h>
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/******************************************************************************
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*
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* DBE MI Procedure: miDbeGetVisualInfo
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*
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* Description:
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*
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* This is the MI function for the DbeGetVisualInfo request. This function
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* is called through pDbeScreenPriv->GetVisualInfo. This function is also
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* called for the DbeAllocateBackBufferName request at the extension level;
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* it is called by ProcDbeAllocateBackBufferName() in dbe.c.
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*
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* If memory allocation fails or we can not get the visual info, this
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* function returns FALSE. Otherwise, it returns TRUE for success.
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*
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*****************************************************************************/
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static Bool
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miDbeGetVisualInfo(ScreenPtr pScreen, XdbeScreenVisualInfo * pScrVisInfo)
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{
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register int i, j, k;
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register int count;
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DepthPtr pDepth;
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XdbeVisualInfo *visInfo;
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/* Determine number of visuals for this screen. */
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for (i = 0, count = 0; i < pScreen->numDepths; i++) {
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count += pScreen->allowedDepths[i].numVids;
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}
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/* Allocate an array of XdbeVisualInfo items. */
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if (!(visInfo = calloc(count, sizeof(XdbeVisualInfo)))) {
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return FALSE; /* memory alloc failure */
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}
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for (i = 0, k = 0; i < pScreen->numDepths; i++) {
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/* For each depth of this screen, get visual information. */
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pDepth = &pScreen->allowedDepths[i];
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for (j = 0; j < pDepth->numVids; j++) {
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/* For each visual for this depth of this screen, get visual ID
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* and visual depth. Since this is MI code, we will always return
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* the same performance level for all visuals (0). A higher
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* performance level value indicates higher performance.
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*/
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visInfo[k].visual = pDepth->vids[j];
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visInfo[k].depth = pDepth->depth;
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visInfo[k].perflevel = 0;
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k++;
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}
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}
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/* Record the number of visuals and point visual_depth to
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* the array of visual info.
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*/
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pScrVisInfo->count = count;
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pScrVisInfo->visinfo = visInfo;
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return TRUE; /* success */
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} /* miDbeGetVisualInfo() */
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/******************************************************************************
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*
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* DBE MI Procedure: miAllocBackBufferName
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*
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* Description:
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*
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* This is the MI function for the DbeAllocateBackBufferName request.
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*
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*****************************************************************************/
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static int
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miDbeAllocBackBufferName(WindowPtr pWin, XID bufId, int swapAction)
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{
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ScreenPtr pScreen;
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DbeWindowPrivPtr pDbeWindowPriv;
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DbeScreenPrivPtr pDbeScreenPriv;
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GCPtr pGC;
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xRectangle clearRect;
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int rc;
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pScreen = pWin->drawable.pScreen;
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pDbeWindowPriv = DBE_WINDOW_PRIV(pWin);
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if (pDbeWindowPriv->nBufferIDs == 0) {
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/* There is no buffer associated with the window.
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* We have to create the window priv priv. Remember, the window
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* priv was created at the DIX level, so all we need to do is
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* create the priv priv and attach it to the priv.
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*/
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pDbeScreenPriv = DBE_SCREEN_PRIV(pScreen);
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/* Get a front pixmap. */
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if (!(pDbeWindowPriv->pFrontBuffer =
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(*pScreen->CreatePixmap) (pScreen, pDbeWindowPriv->width,
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pDbeWindowPriv->height,
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pWin->drawable.depth, 0))) {
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return BadAlloc;
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}
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/* Get a back pixmap. */
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if (!(pDbeWindowPriv->pBackBuffer =
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(*pScreen->CreatePixmap) (pScreen, pDbeWindowPriv->width,
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pDbeWindowPriv->height,
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pWin->drawable.depth, 0))) {
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dixDestroyPixmap(pDbeWindowPriv->pFrontBuffer, 0);
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return BadAlloc;
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}
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/* Security creation/labeling check. */
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rc = XaceHookResourceAccess(serverClient, bufId, dbeDrawableResType,
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pDbeWindowPriv->pBackBuffer, X11_RESTYPE_WINDOW,
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pWin, DixCreateAccess);
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/* Make the back pixmap a DBE drawable resource. */
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if (rc != Success || !AddResource(bufId, dbeDrawableResType,
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pDbeWindowPriv->pBackBuffer)) {
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/* free the buffer and the drawable resource */
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FreeResource(bufId, X11_RESTYPE_NONE);
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return (rc == Success) ? BadAlloc : rc;
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}
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/* Clear the back buffer. */
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pGC = GetScratchGC(pWin->drawable.depth, pWin->drawable.pScreen);
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if ((*pDbeScreenPriv->SetupBackgroundPainter) (pWin, pGC)) {
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ValidateGC((DrawablePtr) pDbeWindowPriv->pBackBuffer, pGC);
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clearRect.x = clearRect.y = 0;
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clearRect.width = pDbeWindowPriv->pBackBuffer->drawable.width;
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clearRect.height = pDbeWindowPriv->pBackBuffer->drawable.height;
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(*pGC->ops->PolyFillRect) ((DrawablePtr) pDbeWindowPriv->
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pBackBuffer, pGC, 1, &clearRect);
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}
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FreeScratchGC(pGC);
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} /* if no buffer associated with the window */
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else {
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/* A buffer is already associated with the window.
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* Place the new buffer ID information at the head of the ID list.
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*/
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/* Associate the new ID with an existing pixmap. */
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if (!AddResource(bufId, dbeDrawableResType,
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(void *) pDbeWindowPriv->pBackBuffer)) {
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return BadAlloc;
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}
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}
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return Success;
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} /* miDbeAllocBackBufferName() */
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/******************************************************************************
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*
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* DBE MI Procedure: miDbeAliasBuffers
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*
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* Description:
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*
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* This function associates all XIDs of a buffer with the back pixmap
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* stored in the window priv.
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*
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*****************************************************************************/
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static void
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miDbeAliasBuffers(DbeWindowPrivPtr pDbeWindowPriv)
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{
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int i;
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for (i = 0; i < pDbeWindowPriv->nBufferIDs; i++) {
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ChangeResourceValue(pDbeWindowPriv->IDs[i], dbeDrawableResType,
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(void *) pDbeWindowPriv->pBackBuffer);
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}
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} /* miDbeAliasBuffers() */
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/******************************************************************************
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*
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* DBE MI Procedure: miDbeSwapBuffers
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*
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* Description:
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*
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* This is the MI function for the DbeSwapBuffers request.
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*
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*****************************************************************************/
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static int
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miDbeSwapBuffers(ClientPtr client, int *pNumWindows, DbeSwapInfoPtr swapInfo)
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{
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DbeScreenPrivPtr pDbeScreenPriv;
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DbeWindowPrivPtr pDbeWindowPriv;
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GCPtr pGC;
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WindowPtr pWin;
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PixmapPtr pTmpBuffer;
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xRectangle clearRect;
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pWin = swapInfo[0].pWindow;
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pDbeScreenPriv = DBE_SCREEN_PRIV_FROM_WINDOW(pWin);
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pDbeWindowPriv = DBE_WINDOW_PRIV(pWin);
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pGC = GetScratchGC(pWin->drawable.depth, pWin->drawable.pScreen);
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/*
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**********************************************************************
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** Setup before swap.
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**********************************************************************
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*/
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switch (swapInfo[0].swapAction) {
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case XdbeUndefined:
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break;
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case XdbeBackground:
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break;
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case XdbeUntouched:
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ValidateGC((DrawablePtr) pDbeWindowPriv->pFrontBuffer, pGC);
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(void) (*pGC->ops->CopyArea) ((DrawablePtr) pWin,
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(DrawablePtr) pDbeWindowPriv->pFrontBuffer,
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pGC, 0, 0, pWin->drawable.width,
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pWin->drawable.height, 0, 0);
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break;
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case XdbeCopied:
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break;
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}
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/*
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**********************************************************************
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** Swap.
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**********************************************************************
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*/
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ValidateGC((DrawablePtr) pWin, pGC);
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(void) (*pGC->ops->CopyArea) ((DrawablePtr) pDbeWindowPriv->pBackBuffer,
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(DrawablePtr) pWin, pGC, 0, 0,
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pWin->drawable.width,
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pWin->drawable.height, 0, 0);
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/*
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**********************************************************************
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** Tasks after swap.
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**********************************************************************
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*/
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switch (swapInfo[0].swapAction) {
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case XdbeUndefined:
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break;
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case XdbeBackground:
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if ((*pDbeScreenPriv->SetupBackgroundPainter) (pWin, pGC)) {
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ValidateGC((DrawablePtr) pDbeWindowPriv->pBackBuffer, pGC);
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clearRect.x = 0;
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clearRect.y = 0;
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clearRect.width = pDbeWindowPriv->pBackBuffer->drawable.width;
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clearRect.height = pDbeWindowPriv->pBackBuffer->drawable.height;
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(*pGC->ops->PolyFillRect) ((DrawablePtr) pDbeWindowPriv->
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pBackBuffer, pGC, 1, &clearRect);
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}
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break;
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case XdbeUntouched:
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/* Swap pixmap pointers. */
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pTmpBuffer = pDbeWindowPriv->pBackBuffer;
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pDbeWindowPriv->pBackBuffer = pDbeWindowPriv->pFrontBuffer;
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pDbeWindowPriv->pFrontBuffer = pTmpBuffer;
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miDbeAliasBuffers(pDbeWindowPriv);
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break;
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case XdbeCopied:
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break;
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}
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/* Remove the swapped window from the swap information array and decrement
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* pNumWindows to indicate to the DIX level how many windows were actually
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* swapped.
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*/
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if (*pNumWindows > 1) {
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/* We were told to swap more than one window, but we only swapped the
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* first one. Remove the first window in the list by moving the last
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* window to the beginning.
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*/
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swapInfo[0].pWindow = swapInfo[*pNumWindows - 1].pWindow;
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swapInfo[0].swapAction = swapInfo[*pNumWindows - 1].swapAction;
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/* Clear the last window information just to be safe. */
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swapInfo[*pNumWindows - 1].pWindow = (WindowPtr) NULL;
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swapInfo[*pNumWindows - 1].swapAction = 0;
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}
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else {
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/* Clear the window information just to be safe. */
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swapInfo[0].pWindow = (WindowPtr) NULL;
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swapInfo[0].swapAction = 0;
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}
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(*pNumWindows)--;
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FreeScratchGC(pGC);
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return Success;
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} /* miSwapBuffers() */
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/******************************************************************************
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*
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* DBE MI Procedure: miDbeWinPrivDelete
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*
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* Description:
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*
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* This is the MI function for deleting the dbeWindowPrivResType resource.
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* This function is invoked indirectly by calling FreeResource() to free
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* the resources associated with a DBE buffer ID. There are 5 ways that
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* miDbeWinPrivDelete() can be called by FreeResource(). They are:
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*
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* - A DBE window is destroyed, in which case the DbeWindowDestroy()
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* callback is invoked. It calls FreeResource() for all DBE buffer IDs.
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*
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* - miDbeAllocBackBufferName() calls FreeResource() to clean up resources
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* after a buffer allocation failure.
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*
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* - The WindowPosition hook, miDbeWindowPosition(), calls
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* FreeResource() when it fails to create buffers of the new size.
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* FreeResource() is called for all DBE buffer IDs.
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*
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* - FreeClientResources() calls FreeResource() when a client dies or the
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* the server resets.
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*
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* When FreeResource() is called for a DBE buffer ID, the delete function
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* for the only other type of DBE resource, dbeDrawableResType, is also
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* invoked. This delete function (DbeDrawableDelete) is a NOOP to make
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* resource deletion easier. It is not guaranteed which delete function is
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* called first. Hence, we will let miDbeWinPrivDelete() free all DBE
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* resources.
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*
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* This function deletes/frees the following stuff associated with
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* the window private:
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*
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* - the ID node in the ID list representing the passed in ID.
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*
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* In addition, pDbeWindowPriv->nBufferIDs is decremented.
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*
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* If this function is called for the last/only buffer ID for a window,
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* these are additionally deleted/freed:
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*
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* - the front and back pixmaps
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* - the window priv itself
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*
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*****************************************************************************/
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static void
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miDbeWinPrivDelete(DbeWindowPrivPtr pDbeWindowPriv, XID bufId)
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{
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if (pDbeWindowPriv->nBufferIDs != 0) {
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/* We still have at least one more buffer ID associated with this
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* window.
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*/
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return;
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}
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/* We have no more buffer IDs associated with this window. We need to
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* free some stuff.
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*/
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/* Destroy the front and back pixmaps. */
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if (pDbeWindowPriv->pFrontBuffer)
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dixDestroyPixmap(pDbeWindowPriv->pFrontBuffer, 0);
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if (pDbeWindowPriv->pBackBuffer)
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dixDestroyPixmap(pDbeWindowPriv->pBackBuffer, 0);
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} /* miDbeWinPrivDelete() */
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/******************************************************************************
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*
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* DBE MI Procedure: miDbeWindowPosition
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*
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* Description:
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*
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* This function was cloned from miMbxWindowPosition() in mimultibuf.c.
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* This function resizes the buffer when the window is resized.
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*
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*****************************************************************************/
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void miDbeWindowPosition(CallbackListPtr *pcbl, ScreenPtr pScreen, XorgScreenWindowPositionParamRec *param)
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{
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DbeScreenPrivPtr pDbeScreenPriv;
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DbeWindowPrivPtr pDbeWindowPriv;
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int width, height;
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int dx, dy, dw, dh;
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int sourcex, sourcey;
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int destx, desty;
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int savewidth, saveheight;
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PixmapPtr pFrontBuffer;
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PixmapPtr pBackBuffer;
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Bool clear;
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GCPtr pGC;
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xRectangle clearRect;
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WindowPtr pWin = param->window;
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pDbeScreenPriv = DBE_SCREEN_PRIV(pScreen);
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/*
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**************************************************************************
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** 5. Do any work necessary after the member routine has been called.
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**************************************************************************
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*/
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if (!(pDbeWindowPriv = DBE_WINDOW_PRIV(pWin)))
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return;
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if (pDbeWindowPriv->width == pWin->drawable.width &&
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pDbeWindowPriv->height == pWin->drawable.height)
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return;
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width = pWin->drawable.width;
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height = pWin->drawable.height;
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dx = pWin->drawable.x - pDbeWindowPriv->x;
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dy = pWin->drawable.y - pDbeWindowPriv->y;
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dw = width - pDbeWindowPriv->width;
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dh = height - pDbeWindowPriv->height;
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GravityTranslate(0, 0, -dx, -dy, dw, dh, pWin->bitGravity, &destx, &desty);
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clear = ((pDbeWindowPriv->width < (unsigned short) width) ||
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(pDbeWindowPriv->height < (unsigned short) height) ||
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(pWin->bitGravity == ForgetGravity));
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sourcex = 0;
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sourcey = 0;
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savewidth = pDbeWindowPriv->width;
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saveheight = pDbeWindowPriv->height;
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/* Clip rectangle to source and destination. */
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if (destx < 0) {
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savewidth += destx;
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sourcex -= destx;
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destx = 0;
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}
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if (destx + savewidth > width) {
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savewidth = width - destx;
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}
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if (desty < 0) {
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saveheight += desty;
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sourcey -= desty;
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desty = 0;
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}
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if (desty + saveheight > height) {
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saveheight = height - desty;
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}
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pDbeWindowPriv->width = width;
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pDbeWindowPriv->height = height;
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pDbeWindowPriv->x = pWin->drawable.x;
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pDbeWindowPriv->y = pWin->drawable.y;
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pGC = GetScratchGC(pWin->drawable.depth, pScreen);
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if (clear) {
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if ((*pDbeScreenPriv->SetupBackgroundPainter) (pWin, pGC)) {
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clearRect.x = 0;
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clearRect.y = 0;
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clearRect.width = width;
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clearRect.height = height;
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}
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else {
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clear = FALSE;
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}
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}
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|
||
/* Create DBE buffer pixmaps equal to size of resized window. */
|
||
pFrontBuffer = (*pScreen->CreatePixmap) (pScreen, width, height,
|
||
pWin->drawable.depth, 0);
|
||
|
||
pBackBuffer = (*pScreen->CreatePixmap) (pScreen, width, height,
|
||
pWin->drawable.depth, 0);
|
||
|
||
if (!pFrontBuffer || !pBackBuffer) {
|
||
/* We failed at creating 1 or 2 of the pixmaps. */
|
||
|
||
dixDestroyPixmap(pFrontBuffer, 0);
|
||
dixDestroyPixmap(pBackBuffer, 0);
|
||
|
||
/* Destroy all buffers for this window. */
|
||
while (pDbeWindowPriv) {
|
||
/* DbeWindowPrivDelete() will free the window private if there no
|
||
* more buffer IDs associated with this window.
|
||
*/
|
||
FreeResource(pDbeWindowPriv->IDs[0], X11_RESTYPE_NONE);
|
||
pDbeWindowPriv = DBE_WINDOW_PRIV(pWin);
|
||
}
|
||
|
||
FreeScratchGC(pGC);
|
||
return;
|
||
}
|
||
|
||
else {
|
||
/* Clear out the new DBE buffer pixmaps. */
|
||
|
||
/* I suppose this could avoid quite a bit of work if
|
||
* it computed the minimal area required.
|
||
*/
|
||
ValidateGC(&pFrontBuffer->drawable, pGC);
|
||
if (clear) {
|
||
(*pGC->ops->PolyFillRect) ((DrawablePtr) pFrontBuffer, pGC, 1,
|
||
&clearRect);
|
||
}
|
||
/* Copy the contents of the old front pixmap to the new one. */
|
||
if (pWin->bitGravity != ForgetGravity) {
|
||
(void) (*pGC->ops->CopyArea) ((DrawablePtr) pDbeWindowPriv->pFrontBuffer,
|
||
(DrawablePtr) pFrontBuffer, pGC,
|
||
sourcex, sourcey, savewidth, saveheight,
|
||
destx, desty);
|
||
}
|
||
|
||
ValidateGC(&pBackBuffer->drawable, pGC);
|
||
if (clear) {
|
||
(*pGC->ops->PolyFillRect) ((DrawablePtr) pBackBuffer, pGC, 1,
|
||
&clearRect);
|
||
}
|
||
/* Copy the contents of the old back pixmap to the new one. */
|
||
if (pWin->bitGravity != ForgetGravity) {
|
||
(void) (*pGC->ops->CopyArea) ((DrawablePtr) pDbeWindowPriv->pBackBuffer,
|
||
(DrawablePtr) pBackBuffer, pGC,
|
||
sourcex, sourcey, savewidth, saveheight,
|
||
destx, desty);
|
||
}
|
||
|
||
/* Destroy the old pixmaps, and point the DBE window priv to the new
|
||
* pixmaps.
|
||
*/
|
||
|
||
dixDestroyPixmap(pDbeWindowPriv->pFrontBuffer, 0);
|
||
dixDestroyPixmap(pDbeWindowPriv->pBackBuffer, 0);
|
||
|
||
pDbeWindowPriv->pFrontBuffer = pFrontBuffer;
|
||
pDbeWindowPriv->pBackBuffer = pBackBuffer;
|
||
|
||
/* Make sure all XID are associated with the new back pixmap. */
|
||
miDbeAliasBuffers(pDbeWindowPriv);
|
||
|
||
FreeScratchGC(pGC);
|
||
}
|
||
}
|
||
|
||
/******************************************************************************
|
||
*
|
||
* DBE MI Procedure: miDbeInit
|
||
*
|
||
* Description:
|
||
*
|
||
* This is the MI initialization function called by DbeExtensionInit().
|
||
*
|
||
*****************************************************************************/
|
||
|
||
Bool
|
||
miDbeInit(ScreenPtr pScreen, DbeScreenPrivPtr pDbeScreenPriv)
|
||
{
|
||
dixScreenHookWindowPosition(pScreen, miDbeWindowPosition);
|
||
|
||
/* Initialize the per-screen DBE function pointers. */
|
||
pDbeScreenPriv->GetVisualInfo = miDbeGetVisualInfo;
|
||
pDbeScreenPriv->AllocBackBufferName = miDbeAllocBackBufferName;
|
||
pDbeScreenPriv->SwapBuffers = miDbeSwapBuffers;
|
||
pDbeScreenPriv->WinPrivDelete = miDbeWinPrivDelete;
|
||
|
||
return TRUE;
|
||
|
||
} /* miDbeInit() */
|