401a8d6e13
Some games incorrectly use non-premultiplied ARGB cursor data, presumably because that's what Windows uses. On some hardware (and with SWcursor), this breaks areas of the cursor which are supposed to be transparent (and presumably also translucent areas, but that's less noticeable). This change checks for pixels with alpha == 0 and any non-alpha component != 0. If any such pixel is found, the data is assumed to be non-premultiplied and fixed up by multiplying the RGB components with the alpha component. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=92309 Signed-off-by: Michel Dänzer <michel.daenzer@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
517 lines
15 KiB
C
517 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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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#include <X11/X.h>
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#include <X11/Xmd.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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DevScreenPrivateKeyRec cursorScreenDevPriv;
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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(const CursorPtr 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 = XaceHook(XACE_RESOURCE_ACCESS, client, cid, RT_CURSOR,
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pCurs, RT_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, RT_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, RT_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 = XaceHook(XACE_RESOURCE_ACCESS, client, cid, RT_CURSOR,
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pCurs, RT_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(char *unused1, unsigned int unused2)
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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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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, RT_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), RT_CURSOR, (void *) curs))
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return NullCursor;
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return curs;
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}
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