diff options
Diffstat (limited to 'src/Filter.c')
| -rw-r--r-- | src/Filter.c | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/src/Filter.c b/src/Filter.c new file mode 100644 index 0000000..dfc5480 --- /dev/null +++ b/src/Filter.c @@ -0,0 +1,150 @@ +/* + * $XFree86: xc/lib/Xrender/Filter.c,v 1.1 2002/09/26 02:56:52 keithp Exp $ + * + * Copyright © 2002 Keith Packard, member of The XFree86 Project, Inc. + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that + * copyright notice and this permission notice appear in supporting + * documentation, and that the name of Keith Packard not be used in + * advertising or publicity pertaining to distribution of the software without + * specific, written prior permission. Keith Packard makes no + * representations about the suitability of this software for any purpose. It + * is provided "as is" without express or implied warranty. + * + * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, + * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO + * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR + * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, + * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + * PERFORMANCE OF THIS SOFTWARE. + */ + +#include "Xrenderint.h" + +XFilters * +XRenderQueryFilters (Display *dpy, Drawable drawable) +{ + XExtDisplayInfo *info = XRenderFindDisplay (dpy); + XRenderInfo *xri; + xRenderQueryFiltersReq *req; + xRenderQueryFiltersReply rep; + XFilters *filters; + char *name; + char len; + int i; + long nbytes, nbytesAlias, nbytesName; + + if (!XextHasExtension (info)) + return 0; + + if (!XRenderQueryFormats (dpy)) + return 0; + + xri = (XRenderInfo *) info->data; + if (xri->minor_version < 6) + return 0; + + LockDisplay (dpy); + GetReq (RenderQueryFilters, req); + req->reqType = info->codes->major_opcode; + req->renderReqType = X_RenderQueryFilters; + req->drawable = drawable; + if (!_XReply (dpy, (xReply *) &rep, 0, xFalse)) + { + UnlockDisplay (dpy); + SyncHandle (); + return 0; + } + /* + * Compute total number of bytes for filter names + */ + nbytes = (long)rep.length << 2; + nbytesAlias = rep.numAliases * 2; + if (rep.numAliases & 1) + nbytesAlias += 2; + nbytesName = nbytes - nbytesAlias; + + /* + * Allocate one giant block for the whole data structure + */ + filters = Xmalloc (sizeof (XFilters) + + rep.numFilters * sizeof (char *) + + rep.numAliases * sizeof (short) + + nbytesName); + + if (!filters) + { + _XEatData (dpy, (unsigned long) rep.length << 2); + UnlockDisplay (dpy); + SyncHandle (); + return 0; + } + + /* + * Layout: + * XFilters + * numFilters char * pointers to filter names + * numAliases short alias values + * nbytesName char strings + */ + + filters->nfilter = rep.numFilters; + filters->nalias = rep.numAliases; + filters->filter = (char **) (filters + 1); + filters->alias = (short *) (filters->filter + rep.numFilters); + name = (char *) (filters->alias + rep.numAliases); + + /* + * Read the filter aliases + */ + _XRead16Pad (dpy, filters->alias, 2 * rep.numAliases); + + /* + * Read the filter names + */ + for (i = 0; i < rep.numFilters; i++) + { + int l; + _XRead (dpy, &len, 1); + l = len & 0xff; + filters->filter[i] = name; + _XRead (dpy, name, l); + name[l] = '\0'; + name += l + 1; + } + i = name - (char *) (filters->alias + rep.numAliases); + + if (i & 3) + _XEatData (dpy, 4 - (i & 3)); + + UnlockDisplay (dpy); + return filters; +} + +void +XRenderSetPictureFilter (Display *dpy, + Picture picture, + char *filter, + XFixed *params, + int nparams) +{ + XExtDisplayInfo *info = XRenderFindDisplay (dpy); + xRenderSetPictureFilterReq *req; + int nbytes = strlen (filter); + + RenderSimpleCheckExtension (dpy, info); + LockDisplay(dpy); + GetReq(RenderSetPictureFilter, req); + req->reqType = info->codes->major_opcode; + req->renderReqType = X_RenderSetPictureFilter; + req->picture = picture; + req->nbytes = nbytes; + req->length += ((nbytes + 3) >> 2) + nparams; + Data (dpy, filter, nbytes); + Data32 (dpy, params, nparams << 2); + UnlockDisplay(dpy); + SyncHandle(); +} |