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Diffstat (limited to 'xorg-server/dix/cursor.c')
-rw-r--r--xorg-server/dix/cursor.c492
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diff --git a/xorg-server/dix/cursor.c b/xorg-server/dix/cursor.c
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+/***********************************************************
+
+Copyright 1987, 1998 The Open Group
+
+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.
+
+The above copyright notice and this permission notice 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
+OPEN GROUP 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.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+
+Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
+
+ All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its
+documentation for any purpose and without fee is hereby granted,
+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 Digital not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.
+
+DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL 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 <X11/X.h>
+#include <X11/Xmd.h>
+#include "servermd.h"
+#include "scrnintstr.h"
+#include "dixstruct.h"
+#include "cursorstr.h"
+#include "dixfontstr.h"
+#include "opaque.h"
+#include "xace.h"
+
+typedef struct _GlyphShare {
+ FontPtr font;
+ unsigned short sourceChar;
+ unsigned short maskChar;
+ CursorBitsPtr bits;
+ struct _GlyphShare *next;
+} GlyphShare, *GlyphSharePtr;
+
+static GlyphSharePtr sharedGlyphs = (GlyphSharePtr)NULL;
+
+#ifdef XFIXES
+static CARD32 cursorSerial;
+#endif
+
+static void
+FreeCursorBits(CursorBitsPtr bits)
+{
+ if (--bits->refcnt > 0)
+ return;
+ xfree(bits->source);
+ xfree(bits->mask);
+#ifdef ARGB_CURSOR
+ xfree(bits->argb);
+#endif
+ if (bits->refcnt == 0)
+ {
+ GlyphSharePtr *prev, this;
+
+ for (prev = &sharedGlyphs;
+ (this = *prev) && (this->bits != bits);
+ prev = &this->next)
+ ;
+ if (this)
+ {
+ *prev = this->next;
+ CloseFont(this->font, (Font)0);
+ xfree(this);
+ }
+ dixFreePrivates(bits->devPrivates);
+ xfree(bits);
+ }
+}
+
+/**
+ * To be called indirectly by DeleteResource; must use exactly two args.
+ *
+ * \param value must conform to DeleteType
+ */
+_X_EXPORT int
+FreeCursor(pointer value, XID cid)
+{
+ int nscr;
+ CursorPtr pCurs = (CursorPtr)value;
+
+ ScreenPtr pscr;
+
+ if ( --pCurs->refcnt > 0)
+ return(Success);
+
+ for (nscr = 0; nscr < screenInfo.numScreens; nscr++)
+ {
+ pscr = screenInfo.screens[nscr];
+ (void)( *pscr->UnrealizeCursor)( pscr, pCurs);
+ }
+ dixFreePrivates(pCurs->devPrivates);
+ FreeCursorBits(pCurs->bits);
+ xfree( pCurs);
+ return(Success);
+}
+
+
+/*
+ * We check for empty cursors so that we won't have to display them
+ */
+static void
+CheckForEmptyMask(CursorBitsPtr bits)
+{
+ unsigned char *msk = bits->mask;
+ int n = BitmapBytePad(bits->width) * bits->height;
+
+ bits->emptyMask = FALSE;
+ while(n--)
+ if(*(msk++) != 0) return;
+#ifdef ARGB_CURSOR
+ if (bits->argb)
+ {
+ CARD32 *argb = bits->argb;
+ int n = bits->width * bits->height;
+ while (n--)
+ if (*argb++ & 0xff000000) return;
+ }
+#endif
+ bits->emptyMask = TRUE;
+}
+
+/**
+ * does nothing about the resource table, just creates the data structure.
+ * does not copy the src and mask bits
+ *
+ * \param psrcbits server-defined padding
+ * \param pmaskbits server-defined padding
+ * \param argb no padding
+ */
+int
+AllocARGBCursor(unsigned char *psrcbits, unsigned char *pmaskbits,
+ CARD32 *argb, CursorMetricPtr cm,
+ unsigned foreRed, unsigned foreGreen, unsigned foreBlue,
+ unsigned backRed, unsigned backGreen, unsigned backBlue,
+ CursorPtr *ppCurs, ClientPtr client, XID cid)
+{
+ CursorBitsPtr bits;
+ CursorPtr pCurs;
+ int rc, nscr;
+ ScreenPtr pscr;
+
+ *ppCurs = NULL;
+ pCurs = (CursorPtr)xalloc(sizeof(CursorRec) + sizeof(CursorBits));
+ if (!pCurs)
+ {
+ xfree(psrcbits);
+ xfree(pmaskbits);
+ return BadAlloc;
+ }
+ bits = (CursorBitsPtr)((char *)pCurs + sizeof(CursorRec));
+ bits->source = psrcbits;
+ bits->mask = pmaskbits;
+#ifdef ARGB_CURSOR
+ bits->argb = argb;
+#endif
+ bits->width = cm->width;
+ bits->height = cm->height;
+ bits->xhot = cm->xhot;
+ bits->yhot = cm->yhot;
+ bits->devPrivates = NULL;
+ bits->refcnt = -1;
+ CheckForEmptyMask(bits);
+ pCurs->bits = bits;
+ pCurs->refcnt = 1;
+#ifdef XFIXES
+ pCurs->serialNumber = ++cursorSerial;
+ pCurs->name = None;
+#endif
+
+ pCurs->foreRed = foreRed;
+ pCurs->foreGreen = foreGreen;
+ pCurs->foreBlue = foreBlue;
+
+ pCurs->backRed = backRed;
+ pCurs->backGreen = backGreen;
+ pCurs->backBlue = backBlue;
+
+ pCurs->id = cid;
+ pCurs->devPrivates = NULL;
+
+ /* security creation/labeling check */
+ rc = XaceHook(XACE_RESOURCE_ACCESS, client, cid, RT_CURSOR,
+ pCurs, RT_NONE, NULL, DixCreateAccess);
+ if (rc != Success) {
+ dixFreePrivates(pCurs->devPrivates);
+ FreeCursorBits(bits);
+ xfree(pCurs);
+ return rc;
+ }
+
+ /*
+ * realize the cursor for every screen
+ */
+ for (nscr = 0; nscr < screenInfo.numScreens; nscr++)
+ {
+ pscr = screenInfo.screens[nscr];
+ if (!( *pscr->RealizeCursor)( pscr, pCurs))
+ {
+ while (--nscr >= 0)
+ {
+ pscr = screenInfo.screens[nscr];
+ ( *pscr->UnrealizeCursor)( pscr, pCurs);
+ }
+ dixFreePrivates(pCurs->devPrivates);
+ FreeCursorBits(bits);
+ xfree(pCurs);
+ return BadAlloc;
+ }
+ }
+ *ppCurs = pCurs;
+ return rc;
+}
+
+int
+AllocGlyphCursor(Font source, unsigned sourceChar, Font mask, unsigned maskChar,
+ unsigned foreRed, unsigned foreGreen, unsigned foreBlue,
+ unsigned backRed, unsigned backGreen, unsigned backBlue,
+ CursorPtr *ppCurs, ClientPtr client, XID cid)
+{
+ FontPtr sourcefont, maskfont;
+ unsigned char *srcbits;
+ unsigned char *mskbits;
+ CursorMetricRec cm;
+ int rc;
+ CursorBitsPtr bits;
+ CursorPtr pCurs;
+ int nscr;
+ ScreenPtr pscr;
+ GlyphSharePtr pShare;
+
+ rc = dixLookupResource((pointer *)&sourcefont, source, RT_FONT, client,
+ DixUseAccess);
+ if (rc != Success)
+ {
+ client->errorValue = source;
+ return (rc == BadValue) ? BadFont : rc;
+ }
+ rc = dixLookupResource((pointer *)&maskfont, mask, RT_FONT, client,
+ DixUseAccess);
+ if (rc != Success && mask != None)
+ {
+ client->errorValue = mask;
+ return (rc == BadValue) ? BadFont : rc;
+ }
+ if (sourcefont != maskfont)
+ pShare = (GlyphSharePtr)NULL;
+ else
+ {
+ for (pShare = sharedGlyphs;
+ pShare &&
+ ((pShare->font != sourcefont) ||
+ (pShare->sourceChar != sourceChar) ||
+ (pShare->maskChar != maskChar));
+ pShare = pShare->next)
+ ;
+ }
+ if (pShare)
+ {
+ pCurs = (CursorPtr)xalloc(sizeof(CursorRec));
+ if (!pCurs)
+ return BadAlloc;
+ bits = pShare->bits;
+ bits->refcnt++;
+ }
+ else
+ {
+ if (!CursorMetricsFromGlyph(sourcefont, sourceChar, &cm))
+ {
+ client->errorValue = sourceChar;
+ return BadValue;
+ }
+ if (!maskfont)
+ {
+ long n;
+ unsigned char *mskptr;
+
+ n = BitmapBytePad(cm.width)*(long)cm.height;
+ mskptr = mskbits = (unsigned char *)xalloc(n);
+ if (!mskptr)
+ return BadAlloc;
+ while (--n >= 0)
+ *mskptr++ = ~0;
+ }
+ else
+ {
+ if (!CursorMetricsFromGlyph(maskfont, maskChar, &cm))
+ {
+ client->errorValue = maskChar;
+ return BadValue;
+ }
+ if ((rc = ServerBitsFromGlyph(maskfont, maskChar, &cm, &mskbits)))
+ return rc;
+ }
+ if ((rc = ServerBitsFromGlyph(sourcefont, sourceChar, &cm, &srcbits)))
+ {
+ xfree(mskbits);
+ return rc;
+ }
+ if (sourcefont != maskfont)
+ {
+ pCurs = (CursorPtr)xalloc(sizeof(CursorRec) + sizeof(CursorBits));
+ if (pCurs)
+ bits = (CursorBitsPtr)((char *)pCurs + sizeof(CursorRec));
+ else
+ bits = (CursorBitsPtr)NULL;
+ }
+ else
+ {
+ pCurs = (CursorPtr)xalloc(sizeof(CursorRec));
+ if (pCurs)
+ bits = (CursorBitsPtr)xalloc(sizeof(CursorBits));
+ else
+ bits = (CursorBitsPtr)NULL;
+ }
+ if (!bits)
+ {
+ xfree(pCurs);
+ xfree(mskbits);
+ xfree(srcbits);
+ return BadAlloc;
+ }
+ bits->source = srcbits;
+ bits->mask = mskbits;
+#ifdef ARGB_CURSOR
+ bits->argb = 0;
+#endif
+ bits->width = cm.width;
+ bits->height = cm.height;
+ bits->xhot = cm.xhot;
+ bits->yhot = cm.yhot;
+ bits->devPrivates = NULL;
+ if (sourcefont != maskfont)
+ bits->refcnt = -1;
+ else
+ {
+ bits->refcnt = 1;
+ pShare = (GlyphSharePtr)xalloc(sizeof(GlyphShare));
+ if (!pShare)
+ {
+ FreeCursorBits(bits);
+ return BadAlloc;
+ }
+ pShare->font = sourcefont;
+ sourcefont->refcnt++;
+ pShare->sourceChar = sourceChar;
+ pShare->maskChar = maskChar;
+ pShare->bits = bits;
+ pShare->next = sharedGlyphs;
+ sharedGlyphs = pShare;
+ }
+ }
+ CheckForEmptyMask(bits);
+ pCurs->bits = bits;
+ pCurs->refcnt = 1;
+#ifdef XFIXES
+ pCurs->serialNumber = ++cursorSerial;
+ pCurs->name = None;
+#endif
+
+ pCurs->foreRed = foreRed;
+ pCurs->foreGreen = foreGreen;
+ pCurs->foreBlue = foreBlue;
+
+ pCurs->backRed = backRed;
+ pCurs->backGreen = backGreen;
+ pCurs->backBlue = backBlue;
+
+ pCurs->id = cid;
+ pCurs->devPrivates = NULL;
+
+ /* security creation/labeling check */
+ rc = XaceHook(XACE_RESOURCE_ACCESS, client, cid, RT_CURSOR,
+ pCurs, RT_NONE, NULL, DixCreateAccess);
+ if (rc != Success) {
+ dixFreePrivates(pCurs->devPrivates);
+ FreeCursorBits(bits);
+ xfree(pCurs);
+ return rc;
+ }
+
+ /*
+ * realize the cursor for every screen
+ */
+ for (nscr = 0; nscr < screenInfo.numScreens; nscr++)
+ {
+ pscr = screenInfo.screens[nscr];
+ if (!( *pscr->RealizeCursor)( pscr, pCurs))
+ {
+ while (--nscr >= 0)
+ {
+ pscr = screenInfo.screens[nscr];
+ ( *pscr->UnrealizeCursor)( pscr, pCurs);
+ }
+ dixFreePrivates(pCurs->devPrivates);
+ FreeCursorBits(pCurs->bits);
+ xfree(pCurs);
+ return BadAlloc;
+ }
+ }
+ *ppCurs = pCurs;
+ return Success;
+}
+
+/** CreateRootCursor
+ *
+ * look up the name of a font
+ * open the font
+ * add the font to the resource table
+ * make a cursor from the glyphs
+ * add the cursor to the resource table
+ *************************************************************/
+
+CursorPtr
+CreateRootCursor(char *unused1, unsigned int unused2)
+{
+ CursorPtr curs;
+#ifdef NULL_ROOT_CURSOR
+ CursorMetricRec cm;
+#else
+ FontPtr cursorfont;
+ int err;
+ XID fontID;
+#endif
+
+#ifdef NULL_ROOT_CURSOR
+ cm.width = 0;
+ cm.height = 0;
+ cm.xhot = 0;
+ cm.yhot = 0;
+
+ AllocARGBCursor(NULL, NULL, NULL, &cm, 0, 0, 0, 0, 0, 0,
+ &curs, serverClient, (XID)0);
+
+ if (curs == NullCursor)
+ return NullCursor;
+#else
+ fontID = FakeClientID(0);
+ err = OpenFont(serverClient, fontID, FontLoadAll | FontOpenSync,
+ (unsigned)strlen(defaultCursorFont), defaultCursorFont);
+ if (err != Success)
+ return NullCursor;
+
+ cursorfont = (FontPtr)LookupIDByType(fontID, RT_FONT);
+ if (!cursorfont)
+ return NullCursor;
+ if (AllocGlyphCursor(fontID, 0, fontID, 1, 0, 0, 0, ~0, ~0, ~0,
+ &curs, serverClient, (XID)0) != Success)
+ return NullCursor;
+#endif
+
+ if (!AddResource(FakeClientID(0), RT_CURSOR, (pointer)curs))
+ return NullCursor;
+
+ return curs;
+}
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