/* $Xorg: pdither.c,v 1.3 2000/08/17 19:47:28 cpqbld Exp $ */ /**** module pdither.c ****/ /****************************************************************************** Copyright 1993, 1994, 1998 The Open Group All Rights Reserved. The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 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Title to this software shall at all times remain with AGE Logic, Inc. ***************************************************************************** pdither.c -- DIXIE routines for managing the Dither element Larry Hare -- AGE Logic, Inc. May 1993 *****************************************************************************/ /* $XFree86: xc/programs/Xserver/XIE/dixie/process/pdither.c,v 3.4 2001/01/17 22:12:53 dawes Exp $ */ #define _XIEC_PDITHER /* * Include files */ /* * Core X Includes */ #define NEED_EVENTS #include #include /* * XIE Includes */ #include /* * Server XIE Includes */ #include #include #include #include #include #include /* * routines internal to this module */ static Bool PrepPDither(floDefPtr flo, peDefPtr ped); static Bool PrepPDitherStandard(floDefPtr flo, peDefPtr ped, pointer raw, pointer tec); /* * dixie element entry points */ static diElemVecRec pDitherVec = { PrepPDither /* prepare for analysis and execution */ }; /*------------------------------------------------------------------------ -------------------- routine: make a dither element ------------------ ------------------------------------------------------------------------*/ peDefPtr MakeDither(floDefPtr flo, xieTypPhototag tag, xieFlo *pe) { peDefPtr ped; ELEMENT(xieFloDither); ELEMENT_AT_LEAST_SIZE(xieFloDither); ELEMENT_NEEDS_1_INPUT(src); if(!(ped = MakePEDef(1, (CARD32)stuff->elemLength<<2, 0))) FloAllocError(flo,tag,xieElemDither, return(NULL)) ; ped->diVec = &pDitherVec; ped->phototag = tag; ped->flags.process = TRUE; raw = (xieFloDither *)ped->elemRaw; /* * copy the client element parameters (swap if necessary) */ if( flo->reqClient->swapped ) { raw->elemType = stuff->elemType; raw->elemLength = stuff->elemLength; cpswaps(stuff->src, raw->src); raw->bandMask = stuff->bandMask; cpswapl(stuff->levels0, raw->levels0); cpswapl(stuff->levels1, raw->levels1); cpswapl(stuff->levels2, raw->levels2); cpswaps(stuff->lenParams, raw->lenParams); cpswaps(stuff->dither, raw->dither); } else memcpy((char *)raw, (char *)stuff, sizeof(xieFloDither)); /* * copy technique data (if any) */ if(!(ped->techVec = FindTechnique(xieValDither, raw->dither)) || !(ped->techVec->copyfnc(flo, ped, &stuff[1], &raw[1], raw->lenParams, raw->dither == xieValDefault))) TechniqueError(flo,ped,xieValDither,raw->dither,raw->lenParams, return(ped)); /* * assign phototag to inFlo */ ped->inFloLst[SRCtag].srcTag = raw->src; return(ped); } /* end MakePDither */ /*------------------------------------------------------------------------ ---------------- routine: copy routine for no Error Diffusion technique -- ------------------------------------------------------------------------*/ Bool CopyPDitherErrorDiffusion(TECHNQ_COPY_ARGS) { VALIDATE_TECHNIQUE_SIZE(ped->techVec, tsize, isDefault); return(tsize == 0); } /*------------------------------------------------------------------------ ---------------- routine: copy routine for Ordered techniques --------- ------------------------------------------------------------------------*/ #undef sparms #define sparms ((xieTecDitherOrdered *)sParms) #undef rparms #define rparms ((xieTecDitherOrdered *)rParms) Bool CopyPDitherOrdered(TECHNQ_COPY_ARGS) { VALIDATE_TECHNIQUE_SIZE(ped->techVec, tsize, isDefault); if (tsize) rparms->thresholdOrder = sparms->thresholdOrder; else rparms->thresholdOrder = 4; return(TRUE); } /*------------------------------------------------------------------------ ---------------- routine: prep routine for no param techniques ------------- ------------------------------------------------------------------------*/ static Bool PrepPDitherStandard( floDefPtr flo, peDefPtr ped, pointer raw, pointer tec) { return(TRUE); } /*------------------------------------------------------------------------ ---------------- routine: prep routine for Error Diffusion techniques ---- ------------------------------------------------------------------------*/ Bool PrepPDitherErrorDiffusion( floDefPtr flo, peDefPtr ped, xieFloDither *raw, pointer tec) { return PrepPDitherStandard(flo, ped, (pointer) raw, tec); } /*------------------------------------------------------------------------ ---------------- routine: prep routine for Ordered technique ------------- ------------------------------------------------------------------------*/ Bool PrepPDitherOrdered( floDefPtr flo, peDefPtr ped, xieFloDither *raw, xieTecDitherOrdered *tec) { return PrepPDitherStandard(flo, ped, (pointer) raw, (pointer) tec); } /*------------------------------------------------------------------------ ---------------- routine: prepare for analysis and execution ------------- ------------------------------------------------------------------------*/ static Bool PrepPDither(floDefPtr flo, peDefPtr ped) { inFloPtr inf = &ped->inFloLst[SRCtag]; outFloPtr src = &inf->srcDef->outFlo; outFloPtr dst = &ped->outFlo; xieFloDither *raw = (xieFloDither *)ped->elemRaw; CARD32 *levels = &(raw->levels0); int b; /* grab a copy of the src attributes and propagate them to our input */ dst->bands = inf->bands = src->bands; for(b = 0; b < src->bands; b++) { dst->format[b] = inf->format[b] = src->format[b]; if ((raw->bandMask & (1<format[b].class) && src->format[b].class == BIT_PIXEL) MatchError(flo, ped, return(FALSE)); if ((dst->format[b].levels = *(levels+b)) > src->format[b].levels) ValueError(flo,ped,*(levels+b),return(FALSE)); } /* Set depth, class, stride, and pitch */ if (UpdateFormatfromLevels(ped) == FALSE) MatchError(flo,ped, return(FALSE)); /* Take care of any technique parameters */ if (!(ped->techVec->prepfnc(flo, ped, raw, &raw[1]))) TechniqueError(flo,ped,xieValDither,raw->dither,raw->lenParams, return(FALSE)); return (TRUE); } /* end module pdither.c */