360 lines
9.1 KiB
C
360 lines
9.1 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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int width,
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int height)
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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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ps->filters[i].width = width;
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ps->filters[i].height = height;
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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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int *width,
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int *height)
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{
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int w, h;
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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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w = xFixedToInt (params[0]);
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h = xFixedToInt (params[1]);
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nparams -= 2;
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if (w * h > nparams)
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return FALSE;
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*width = w;
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*height = h;
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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, 1, 1) < 0)
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return FALSE;
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if (PictureAddFilter (pScreen, FilterBilinear, 0, 2, 2) < 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, 0) < 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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int width, height;
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if (!(*pFilter->ValidateParams) (pScreen, pFilter->id, params, nparams, &width, &height))
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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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