acda790e43
To prepare for RandR using filters in transforms, split out code paths so that the RandR code can validate the filter name and parameters during the transform set operation so that use of the filter later will not have unreportable errors.
347 lines
8.8 KiB
C
347 lines
8.8 KiB
C
/*
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* Copyright © 2002 Keith Packard
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*
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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, and that the name of Keith Packard not be used in
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* advertising or publicity pertaining to distribution of the software without
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* specific, written prior permission. Keith Packard makes no
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* representations about the suitability of this software for any purpose. It
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* is provided "as is" without express or implied warranty.
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*
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* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS 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 "misc.h"
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#include "scrnintstr.h"
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#include "os.h"
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#include "regionstr.h"
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#include "validate.h"
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#include "windowstr.h"
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#include "input.h"
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#include "resource.h"
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#include "colormapst.h"
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#include "cursorstr.h"
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#include "dixstruct.h"
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#include "gcstruct.h"
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#include "servermd.h"
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#include "picturestr.h"
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static char **filterNames;
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static int nfilterNames;
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/*
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* standard but not required filters don't have constant indices
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*/
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int
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PictureGetFilterId (char *filter, int len, Bool makeit)
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{
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int i;
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char *name;
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char **names;
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if (len < 0)
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len = strlen (filter);
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for (i = 0; i < nfilterNames; i++)
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if (!CompareISOLatin1Lowered ((unsigned char *) filterNames[i], -1, (unsigned char *) filter, len))
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return i;
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if (!makeit)
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return -1;
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name = xalloc (len + 1);
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if (!name)
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return -1;
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memcpy (name, filter, len);
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name[len] = '\0';
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if (filterNames)
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names = xrealloc (filterNames, (nfilterNames + 1) * sizeof (char *));
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else
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names = xalloc (sizeof (char *));
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if (!names)
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{
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xfree (name);
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return -1;
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}
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filterNames = names;
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i = nfilterNames++;
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filterNames[i] = name;
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return i;
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}
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static Bool
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PictureSetDefaultIds (void)
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{
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/* careful here -- this list must match the #define values */
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if (PictureGetFilterId (FilterNearest, -1, TRUE) != PictFilterNearest)
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return FALSE;
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if (PictureGetFilterId (FilterBilinear, -1, TRUE) != PictFilterBilinear)
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return FALSE;
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if (PictureGetFilterId (FilterFast, -1, TRUE) != PictFilterFast)
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return FALSE;
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if (PictureGetFilterId (FilterGood, -1, TRUE) != PictFilterGood)
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return FALSE;
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if (PictureGetFilterId (FilterBest, -1, TRUE) != PictFilterBest)
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return FALSE;
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if (PictureGetFilterId (FilterConvolution, -1, TRUE) != PictFilterConvolution)
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return FALSE;
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return TRUE;
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}
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char *
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PictureGetFilterName (int id)
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{
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if (0 <= id && id < nfilterNames)
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return filterNames[id];
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else
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return 0;
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}
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static void
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PictureFreeFilterIds (void)
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{
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int i;
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for (i = 0; i < nfilterNames; i++)
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xfree (filterNames[i]);
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xfree (filterNames);
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nfilterNames = 0;
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filterNames = 0;
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}
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_X_EXPORT int
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PictureAddFilter (ScreenPtr pScreen,
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char *filter,
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PictFilterValidateParamsProcPtr ValidateParams)
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{
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PictureScreenPtr ps = GetPictureScreen(pScreen);
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int id = PictureGetFilterId (filter, -1, TRUE);
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int i;
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PictFilterPtr filters;
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if (id < 0)
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return -1;
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/*
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* It's an error to attempt to reregister a filter
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*/
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for (i = 0; i < ps->nfilters; i++)
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if (ps->filters[i].id == id)
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return -1;
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if (ps->filters)
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filters = xrealloc (ps->filters, (ps->nfilters + 1) * sizeof (PictFilterRec));
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else
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filters = xalloc (sizeof (PictFilterRec));
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if (!filters)
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return -1;
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ps->filters = filters;
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i = ps->nfilters++;
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ps->filters[i].name = PictureGetFilterName (id);
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ps->filters[i].id = id;
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ps->filters[i].ValidateParams = ValidateParams;
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return id;
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}
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_X_EXPORT Bool
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PictureSetFilterAlias (ScreenPtr pScreen, char *filter, char *alias)
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{
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PictureScreenPtr ps = GetPictureScreen(pScreen);
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int filter_id = PictureGetFilterId (filter, -1, FALSE);
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int alias_id = PictureGetFilterId (alias, -1, TRUE);
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int i;
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if (filter_id < 0 || alias_id < 0)
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return FALSE;
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for (i = 0; i < ps->nfilterAliases; i++)
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if (ps->filterAliases[i].alias_id == alias_id)
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break;
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if (i == ps->nfilterAliases)
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{
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PictFilterAliasPtr aliases;
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if (ps->filterAliases)
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aliases = xrealloc (ps->filterAliases,
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(ps->nfilterAliases + 1) *
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sizeof (PictFilterAliasRec));
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else
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aliases = xalloc (sizeof (PictFilterAliasRec));
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if (!aliases)
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return FALSE;
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ps->filterAliases = aliases;
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ps->filterAliases[i].alias = PictureGetFilterName (alias_id);
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ps->filterAliases[i].alias_id = alias_id;
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ps->nfilterAliases++;
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}
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ps->filterAliases[i].filter_id = filter_id;
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return TRUE;
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}
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PictFilterPtr
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PictureFindFilter (ScreenPtr pScreen, char *name, int len)
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{
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PictureScreenPtr ps = GetPictureScreen(pScreen);
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int id = PictureGetFilterId (name, len, FALSE);
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int i;
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if (id < 0)
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return 0;
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/* Check for an alias, allow them to recurse */
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for (i = 0; i < ps->nfilterAliases; i++)
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if (ps->filterAliases[i].alias_id == id)
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{
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id = ps->filterAliases[i].filter_id;
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i = 0;
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}
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/* find the filter */
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for (i = 0; i < ps->nfilters; i++)
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if (ps->filters[i].id == id)
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return &ps->filters[i];
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return 0;
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}
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static Bool
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convolutionFilterValidateParams (ScreenPtr pScreen,
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int filter,
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xFixed *params,
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int nparams)
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{
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if (nparams < 3)
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return FALSE;
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if (xFixedFrac (params[0]) || xFixedFrac (params[1]))
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return FALSE;
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nparams -= 2;
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if ((xFixedToInt (params[0]) * xFixedToInt (params[1])) > nparams)
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return FALSE;
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return TRUE;
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}
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Bool
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PictureSetDefaultFilters (ScreenPtr pScreen)
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{
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if (!filterNames)
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if (!PictureSetDefaultIds ())
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return FALSE;
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if (PictureAddFilter (pScreen, FilterNearest, 0) < 0)
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return FALSE;
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if (PictureAddFilter (pScreen, FilterBilinear, 0) < 0)
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return FALSE;
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if (!PictureSetFilterAlias (pScreen, FilterNearest, FilterFast))
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return FALSE;
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if (!PictureSetFilterAlias (pScreen, FilterBilinear, FilterGood))
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return FALSE;
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if (!PictureSetFilterAlias (pScreen, FilterBilinear, FilterBest))
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return FALSE;
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if (PictureAddFilter (pScreen, FilterConvolution, convolutionFilterValidateParams) < 0)
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return FALSE;
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return TRUE;
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}
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void
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PictureResetFilters (ScreenPtr pScreen)
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{
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PictureScreenPtr ps = GetPictureScreen(pScreen);
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xfree (ps->filters);
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xfree (ps->filterAliases);
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PictureFreeFilterIds ();
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}
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int
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SetPictureFilter (PicturePtr pPicture, char *name, int len, xFixed *params, int nparams)
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{
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PictFilterPtr pFilter;
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ScreenPtr pScreen;
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if (pPicture->pDrawable != NULL)
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pScreen = pPicture->pDrawable->pScreen;
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else
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pScreen = screenInfo.screens[0];
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pFilter = PictureFindFilter (pScreen, name, len);
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if (!pFilter)
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return BadName;
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if (pPicture->pDrawable == NULL)
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{
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int s;
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/* For source pictures, the picture isn't tied to a screen. So, ensure
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* that all screens can handle a filter we set for the picture.
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*/
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for (s = 1; s < screenInfo.numScreens; s++)
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{
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PictFilterPtr pScreenFilter;
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pScreenFilter = PictureFindFilter (screenInfo.screens[s],
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name, len);
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if (!pScreenFilter || pScreenFilter->id != pFilter->id)
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return BadMatch;
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}
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}
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return SetPicturePictFilter (pPicture, pFilter, params, nparams);
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}
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int
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SetPicturePictFilter (PicturePtr pPicture, PictFilterPtr pFilter,
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xFixed *params, int nparams)
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{
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ScreenPtr pScreen;
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int i;
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if (pPicture->pDrawable)
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pScreen = pPicture->pDrawable->pScreen;
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else
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pScreen = screenInfo.screens[0];
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if (pFilter->ValidateParams)
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{
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if (!(*pFilter->ValidateParams) (pScreen, pFilter->id, params, nparams))
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return BadMatch;
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}
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else if (nparams)
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return BadMatch;
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if (nparams != pPicture->filter_nparams)
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{
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xFixed *new_params = xalloc (nparams * sizeof (xFixed));
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if (!new_params && nparams)
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return BadAlloc;
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xfree (pPicture->filter_params);
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pPicture->filter_params = new_params;
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pPicture->filter_nparams = nparams;
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}
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for (i = 0; i < nparams; i++)
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pPicture->filter_params[i] = params[i];
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pPicture->filter = pFilter->id;
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if (pPicture->pDrawable)
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{
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PictureScreenPtr ps = GetPictureScreen(pScreen);
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int result;
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result = (*ps->ChangePictureFilter) (pPicture, pPicture->filter,
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params, nparams);
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return result;
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}
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return Success;
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}
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