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ad7e7d9259
This function isn't used by any drivers, so no need to export it. Also has just one consumer, so move it there and make it static. (and also move ISOLatin1ToLower() along with it) Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net> Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1374>
404 lines
11 KiB
C
404 lines
11 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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#define XK_LATIN1
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#include <X11/keysymdef.h>
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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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* ISO Latin-1 case conversion routine
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*
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* this routine always null-terminates the result, so
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* beware of too-small buffers
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*/
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static unsigned char
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ISOLatin1ToLower(unsigned char source)
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{
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unsigned char dest;
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if ((source >= XK_A) && (source <= XK_Z))
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dest = source + (XK_a - XK_A);
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else if ((source >= XK_Agrave) && (source <= XK_Odiaeresis))
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dest = source + (XK_agrave - XK_Agrave);
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else if ((source >= XK_Ooblique) && (source <= XK_Thorn))
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dest = source + (XK_oslash - XK_Ooblique);
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else
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dest = source;
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return dest;
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}
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static int
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CompareISOLatin1Lowered(const unsigned char *s1, int s1len,
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const unsigned char *s2, int s2len)
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{
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unsigned char c1, c2;
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for (;;) {
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/* note -- compare against zero so that -1 ignores len */
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c1 = s1len-- ? *s1++ : '\0';
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c2 = s2len-- ? *s2++ : '\0';
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if (!c1 ||
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(c1 != c2 &&
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(c1 = ISOLatin1ToLower(c1)) != (c2 = ISOLatin1ToLower(c2))))
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break;
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}
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return (int) c1 - (int) c2;
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}
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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(const 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((const unsigned char *) filterNames[i], -1,
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(const 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 = malloc(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 = reallocarray(filterNames, nfilterNames + 1, sizeof(char *));
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else
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names = malloc(sizeof(char *));
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if (!names) {
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free(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) !=
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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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free(filterNames[i]);
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free(filterNames);
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nfilterNames = 0;
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filterNames = 0;
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}
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int
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PictureAddFilter(ScreenPtr pScreen,
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const char *filter,
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PictFilterValidateParamsProcPtr ValidateParams,
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int width, 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 =
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reallocarray(ps->filters, ps->nfilters + 1, sizeof(PictFilterRec));
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else
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filters = malloc(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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Bool
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PictureSetFilterAlias(ScreenPtr pScreen, const char *filter, const 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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PictFilterAliasPtr aliases;
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if (ps->filterAliases)
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aliases = reallocarray(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 = malloc(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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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, int *width, 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
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(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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free(ps->filters);
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free(ps->filterAliases);
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/* Free the filters when the last screen is closed */
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if (pScreen->myNum == 0)
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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,
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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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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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PictFilterPtr pScreenFilter;
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pScreenFilter = PictureFindFilter(screenInfo.screens[s], 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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int width, height;
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if (!(*pFilter->ValidateParams)
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(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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xFixed *new_params = xallocarray(nparams, sizeof(xFixed));
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if (!new_params && nparams)
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return BadAlloc;
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free(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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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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