518 lines
15 KiB
C
518 lines
15 KiB
C
/***********************************************************
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Copyright 1987, 1998 The Open Group
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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.
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of The Open Group shall not be
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used in advertising or otherwise to promote the sale, use or other dealings
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in this Software without prior written authorization from The Open Group.
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Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the name of Digital not be
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used in advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
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DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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SOFTWARE.
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******************************************************************/
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#include <dix-config.h>
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#include <X11/X.h>
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#include <X11/Xmd.h>
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#include "dix/cursor_priv.h"
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#include "dix/dix_priv.h"
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#include "servermd.h"
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#include "scrnintstr.h"
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#include "dixstruct.h"
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#include "cursorstr.h"
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#include "dixfontstr.h"
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#include "opaque.h"
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#include "inputstr.h"
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#include "xace.h"
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typedef struct _GlyphShare {
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FontPtr font;
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unsigned short sourceChar;
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unsigned short maskChar;
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CursorBitsPtr bits;
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struct _GlyphShare *next;
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} GlyphShare, *GlyphSharePtr;
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static GlyphSharePtr sharedGlyphs = (GlyphSharePtr) NULL;
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static CARD32 cursorSerial;
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static void
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FreeCursorBits(CursorBitsPtr bits)
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{
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if (--bits->refcnt > 0)
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return;
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free(bits->source);
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free(bits->mask);
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free(bits->argb);
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dixFiniPrivates(bits, PRIVATE_CURSOR_BITS);
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if (bits->refcnt == 0) {
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GlyphSharePtr *prev, this;
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for (prev = &sharedGlyphs;
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(this = *prev) && (this->bits != bits); prev = &this->next);
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if (this) {
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*prev = this->next;
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CloseFont(this->font, (Font) 0);
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free(this);
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}
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free(bits);
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}
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}
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/**
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* To be called indirectly by DeleteResource; must use exactly two args.
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*
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* \param value must conform to DeleteType
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*/
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int
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FreeCursor(void *value, XID cid)
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{
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int nscr;
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CursorPtr pCurs = (CursorPtr) value;
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ScreenPtr pscr;
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DeviceIntPtr pDev = NULL; /* unused anyway */
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UnrefCursor(pCurs);
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if (CursorRefCount(pCurs) != 0)
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return Success;
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BUG_WARN(CursorRefCount(pCurs) < 0);
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for (nscr = 0; nscr < screenInfo.numScreens; nscr++) {
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pscr = screenInfo.screens[nscr];
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(void) (*pscr->UnrealizeCursor) (pDev, pscr, pCurs);
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}
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FreeCursorBits(pCurs->bits);
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dixFiniPrivates(pCurs, PRIVATE_CURSOR);
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free(pCurs);
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return Success;
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}
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CursorPtr
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RefCursor(CursorPtr cursor)
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{
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if (cursor)
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cursor->refcnt++;
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return cursor;
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}
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CursorPtr
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UnrefCursor(CursorPtr cursor)
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{
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if (cursor)
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cursor->refcnt--;
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return cursor;
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}
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int
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CursorRefCount(ConstCursorPtr cursor)
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{
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return cursor ? cursor->refcnt : 0;
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}
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/*
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* We check for empty cursors so that we won't have to display them
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*/
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static void
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CheckForEmptyMask(CursorBitsPtr bits)
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{
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unsigned char *msk = bits->mask;
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int n = BitmapBytePad(bits->width) * bits->height;
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bits->emptyMask = FALSE;
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while (n--)
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if (*(msk++) != 0)
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return;
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if (bits->argb) {
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CARD32 *argb = bits->argb;
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n = bits->width * bits->height;
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while (n--)
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if (*argb++ & 0xff000000)
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return;
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}
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bits->emptyMask = TRUE;
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}
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/**
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* realize the cursor for every screen. Do not change the refcnt, this will be
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* changed when ChangeToCursor actually changes the sprite.
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*
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* @return Success if all cursors realize on all screens, BadAlloc if realize
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* failed for a device on a given screen.
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*/
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static int
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RealizeCursorAllScreens(CursorPtr pCurs)
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{
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DeviceIntPtr pDev;
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ScreenPtr pscr;
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int nscr;
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for (nscr = 0; nscr < screenInfo.numScreens; nscr++) {
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pscr = screenInfo.screens[nscr];
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for (pDev = inputInfo.devices; pDev; pDev = pDev->next) {
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if (DevHasCursor(pDev)) {
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if (!(*pscr->RealizeCursor) (pDev, pscr, pCurs)) {
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/* Realize failed for device pDev on screen pscr.
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* We have to assume that for all devices before, realize
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* worked. We need to rollback all devices so far on the
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* current screen and then all devices on previous
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* screens.
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*/
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DeviceIntPtr pDevIt = inputInfo.devices; /*dev iterator */
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while (pDevIt && pDevIt != pDev) {
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if (DevHasCursor(pDevIt))
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(*pscr->UnrealizeCursor) (pDevIt, pscr, pCurs);
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pDevIt = pDevIt->next;
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}
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while (--nscr >= 0) {
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pscr = screenInfo.screens[nscr];
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/* now unrealize all devices on previous screens */
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pDevIt = inputInfo.devices;
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while (pDevIt) {
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if (DevHasCursor(pDevIt))
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(*pscr->UnrealizeCursor) (pDevIt, pscr, pCurs);
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pDevIt = pDevIt->next;
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}
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(*pscr->UnrealizeCursor) (pDev, pscr, pCurs);
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}
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return BadAlloc;
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}
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}
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}
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}
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return Success;
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}
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/**
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* does nothing about the resource table, just creates the data structure.
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* does not copy the src and mask bits
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*
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* \param psrcbits server-defined padding
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* \param pmaskbits server-defined padding
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* \param argb no padding
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*/
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int
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AllocARGBCursor(unsigned char *psrcbits, unsigned char *pmaskbits,
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CARD32 *argb, CursorMetricPtr cm,
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unsigned foreRed, unsigned foreGreen, unsigned foreBlue,
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unsigned backRed, unsigned backGreen, unsigned backBlue,
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CursorPtr *ppCurs, ClientPtr client, XID cid)
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{
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CursorBitsPtr bits;
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CursorPtr pCurs;
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int rc;
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*ppCurs = NULL;
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pCurs = (CursorPtr) calloc(CURSOR_REC_SIZE + CURSOR_BITS_SIZE, 1);
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if (!pCurs)
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return BadAlloc;
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bits = (CursorBitsPtr) ((char *) pCurs + CURSOR_REC_SIZE);
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dixInitPrivates(pCurs, pCurs + 1, PRIVATE_CURSOR);
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dixInitPrivates(bits, bits + 1, PRIVATE_CURSOR_BITS)
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bits->source = psrcbits;
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bits->mask = pmaskbits;
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bits->argb = argb;
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bits->width = cm->width;
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bits->height = cm->height;
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bits->xhot = cm->xhot;
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bits->yhot = cm->yhot;
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pCurs->refcnt = 1;
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bits->refcnt = -1;
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CheckForEmptyMask(bits);
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pCurs->bits = bits;
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pCurs->serialNumber = ++cursorSerial;
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pCurs->name = None;
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pCurs->foreRed = foreRed;
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pCurs->foreGreen = foreGreen;
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pCurs->foreBlue = foreBlue;
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pCurs->backRed = backRed;
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pCurs->backGreen = backGreen;
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pCurs->backBlue = backBlue;
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pCurs->id = cid;
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/* security creation/labeling check */
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rc = XaceHookResourceAccess(client, cid, X11_RESTYPE_CURSOR,
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pCurs, X11_RESTYPE_NONE, NULL, DixCreateAccess);
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if (rc != Success)
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goto error;
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rc = RealizeCursorAllScreens(pCurs);
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if (rc != Success)
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goto error;
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*ppCurs = pCurs;
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if (argb) {
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size_t i, size = bits->width * bits->height;
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for (i = 0; i < size; i++) {
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if ((argb[i] & 0xff000000) == 0 && (argb[i] & 0xffffff) != 0) {
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/* ARGB data doesn't seem pre-multiplied, fix it */
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for (i = 0; i < size; i++) {
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CARD32 a, ar, ag, ab;
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a = argb[i] >> 24;
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ar = a * ((argb[i] >> 16) & 0xff) / 0xff;
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ag = a * ((argb[i] >> 8) & 0xff) / 0xff;
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ab = a * (argb[i] & 0xff) / 0xff;
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argb[i] = a << 24 | ar << 16 | ag << 8 | ab;
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}
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break;
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}
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}
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}
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return Success;
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error:
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FreeCursorBits(bits);
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dixFiniPrivates(pCurs, PRIVATE_CURSOR);
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free(pCurs);
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return rc;
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}
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int
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AllocGlyphCursor(Font source, unsigned sourceChar, Font mask, unsigned maskChar,
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unsigned foreRed, unsigned foreGreen, unsigned foreBlue,
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unsigned backRed, unsigned backGreen, unsigned backBlue,
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CursorPtr *ppCurs, ClientPtr client, XID cid)
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{
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FontPtr sourcefont, maskfont;
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unsigned char *srcbits;
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unsigned char *mskbits;
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CursorMetricRec cm;
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int rc;
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CursorBitsPtr bits;
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CursorPtr pCurs;
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GlyphSharePtr pShare;
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rc = dixLookupResourceByType((void **) &sourcefont, source, X11_RESTYPE_FONT,
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client, DixUseAccess);
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if (rc != Success) {
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client->errorValue = source;
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return rc;
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}
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rc = dixLookupResourceByType((void **) &maskfont, mask, X11_RESTYPE_FONT, client,
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DixUseAccess);
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if (rc != Success && mask != None) {
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client->errorValue = mask;
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return rc;
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}
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if (sourcefont != maskfont)
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pShare = (GlyphSharePtr) NULL;
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else {
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for (pShare = sharedGlyphs;
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pShare &&
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((pShare->font != sourcefont) ||
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(pShare->sourceChar != sourceChar) ||
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(pShare->maskChar != maskChar)); pShare = pShare->next);
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}
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if (pShare) {
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pCurs = (CursorPtr) calloc(CURSOR_REC_SIZE, 1);
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if (!pCurs)
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return BadAlloc;
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dixInitPrivates(pCurs, pCurs + 1, PRIVATE_CURSOR);
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bits = pShare->bits;
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bits->refcnt++;
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}
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else {
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if (!CursorMetricsFromGlyph(sourcefont, sourceChar, &cm)) {
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client->errorValue = sourceChar;
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return BadValue;
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}
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if (!maskfont) {
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long n;
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unsigned char *mskptr;
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n = BitmapBytePad(cm.width) * (long) cm.height;
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mskptr = mskbits = malloc(n);
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if (!mskptr)
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return BadAlloc;
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while (--n >= 0)
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*mskptr++ = ~0;
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}
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else {
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if (!CursorMetricsFromGlyph(maskfont, maskChar, &cm)) {
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client->errorValue = maskChar;
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return BadValue;
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}
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if ((rc = ServerBitsFromGlyph(maskfont, maskChar, &cm, &mskbits)))
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return rc;
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}
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if ((rc = ServerBitsFromGlyph(sourcefont, sourceChar, &cm, &srcbits))) {
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free(mskbits);
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return rc;
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}
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if (sourcefont != maskfont) {
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pCurs = (CursorPtr) calloc(CURSOR_REC_SIZE + CURSOR_BITS_SIZE, 1);
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if (pCurs)
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bits = (CursorBitsPtr) ((char *) pCurs + CURSOR_REC_SIZE);
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else
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bits = (CursorBitsPtr) NULL;
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}
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else {
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pCurs = (CursorPtr) calloc(CURSOR_REC_SIZE, 1);
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if (pCurs)
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bits = (CursorBitsPtr) calloc(CURSOR_BITS_SIZE, 1);
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else
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bits = (CursorBitsPtr) NULL;
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}
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if (!bits) {
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free(pCurs);
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free(mskbits);
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free(srcbits);
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return BadAlloc;
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}
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dixInitPrivates(pCurs, pCurs + 1, PRIVATE_CURSOR);
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dixInitPrivates(bits, bits + 1, PRIVATE_CURSOR_BITS);
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bits->source = srcbits;
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bits->mask = mskbits;
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bits->argb = 0;
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bits->width = cm.width;
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bits->height = cm.height;
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bits->xhot = cm.xhot;
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bits->yhot = cm.yhot;
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if (sourcefont != maskfont)
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bits->refcnt = -1;
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else {
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bits->refcnt = 1;
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pShare = malloc(sizeof(GlyphShare));
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if (!pShare) {
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FreeCursorBits(bits);
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return BadAlloc;
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}
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pShare->font = sourcefont;
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sourcefont->refcnt++;
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pShare->sourceChar = sourceChar;
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pShare->maskChar = maskChar;
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pShare->bits = bits;
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pShare->next = sharedGlyphs;
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sharedGlyphs = pShare;
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}
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}
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CheckForEmptyMask(bits);
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pCurs->bits = bits;
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pCurs->refcnt = 1;
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pCurs->serialNumber = ++cursorSerial;
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pCurs->name = None;
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pCurs->foreRed = foreRed;
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pCurs->foreGreen = foreGreen;
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pCurs->foreBlue = foreBlue;
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pCurs->backRed = backRed;
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pCurs->backGreen = backGreen;
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pCurs->backBlue = backBlue;
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pCurs->id = cid;
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/* security creation/labeling check */
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rc = XaceHookResourceAccess(client, cid, X11_RESTYPE_CURSOR,
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pCurs, X11_RESTYPE_NONE, NULL, DixCreateAccess);
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if (rc != Success)
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goto error;
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rc = RealizeCursorAllScreens(pCurs);
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if (rc != Success)
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goto error;
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*ppCurs = pCurs;
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return Success;
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error:
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FreeCursorBits(bits);
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dixFiniPrivates(pCurs, PRIVATE_CURSOR);
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free(pCurs);
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return rc;
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}
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/** CreateRootCursor
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*
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* look up the name of a font
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* open the font
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* add the font to the resource table
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* make a cursor from the glyphs
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* add the cursor to the resource table
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*************************************************************/
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CursorPtr
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CreateRootCursor(void)
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{
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CursorPtr curs;
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FontPtr cursorfont;
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int err;
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XID fontID;
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const char defaultCursorFont[] = "cursor";
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fontID = FakeClientID(0);
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err = OpenFont(serverClient, fontID, FontLoadAll | FontOpenSync,
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(unsigned) strlen(defaultCursorFont), defaultCursorFont);
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if (err != Success)
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return NullCursor;
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err = dixLookupResourceByType((void **) &cursorfont, fontID, X11_RESTYPE_FONT,
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serverClient, DixReadAccess);
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if (err != Success)
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return NullCursor;
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if (AllocGlyphCursor(fontID, 0, fontID, 1, 0, 0, 0, ~0, ~0, ~0,
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&curs, serverClient, (XID) 0) != Success)
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return NullCursor;
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if (!AddResource(FakeClientID(0), X11_RESTYPE_CURSOR, (void *) curs))
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return NullCursor;
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return curs;
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}
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