+++ /dev/null
-/*! ========================================================================
-** Extended Template Library
-** Box Blur Template Implementation
-** $Id$
-**
-** Copyright (c) 2002 Robert B. Quattlebaum Jr.
-**
-** This package is free software; you can redistribute it and/or
-** modify it under the terms of the GNU General Public License as
-** published by the Free Software Foundation; either version 2 of
-** the License, or (at your option) any later version.
-**
-** This package is distributed in the hope that it will be useful,
-** but WITHOUT ANY WARRANTY; without even the implied warranty of
-** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-** General Public License for more details.
-**
-** === N O T E S ===========================================================
-**
-** This is an internal header file, included by other ETL headers.
-** You should not attempt to use it directly.
-**
-** ========================================================================= */
-
-/* === S T A R T =========================================================== */
-
-#ifndef __ETL_BOXBLUR_H
-#define __ETL_BOXBLUR_H
-
-/* === H E A D E R S ======================================================= */
-
-/* === M A C R O S ========================================================= */
-
-/* === T Y P E D E F S ===================================================== */
-
-/* === C L A S S E S & S T R U C T S ======================================= */
-
-_ETL_BEGIN_NAMESPACE
-
-template<typename T1,typename T2> void
-hbox_blur(T1 pen,int w, int h, int length, T2 outpen)
-{
- int x,y;
- typename T1::iterator_x iter, end;
-
- length=std::min(w,length);
- const float divisor(1.0f/(length*2+1));
-
- for(y=0;y<h;y++,pen.inc_y(),outpen.inc_y())
- {
- iter=pen.x();
- end=pen.end_x();
-
- typename T1::accumulator_type tot(*iter*(length+1));
-
- for (x=0;x<length && iter!=end;x++,++iter) tot+=*iter;
- iter=pen.x();
-
- for (x=0;x<w && iter!=end;x++,++iter,outpen.inc_x())
- {
- tot -= (x>length) ? iter[-length-1] : *pen.x();
- tot += ((x+length)<w) ? iter[length] : end[-1];
-
- outpen.put_value(tot*divisor);
- }
- outpen.dec_x(x);
- }
-}
-
-#if 1
-template<typename T1,typename T2> void
-vbox_blur(T1 pen,const int w, const int h, int length, T2 outpen)
-{
- int x,y;
- typename T1::iterator_y iter, end;
-
- length=std::min(h,length);
- const float divisor(1.0f/(length*2+1));
-
- for(x=0;x<w;x++,pen.inc_x(),outpen.inc_x())
- {
- iter=pen.y();
- end=pen.end_y();
-
- typename T1::accumulator_type tot(*iter*(length+1));
-
- for (y=0;y<length && iter!=end;y++,++iter) tot+=*iter;
- iter=pen.y();
-
- for (y=0;y<h && iter!=end;y++,++iter,outpen.inc_y())
- {
- tot -= (y>length) ? iter[-length-1] : *pen.y();
- tot += ((y+length)<h) ? iter[length] : end[-1];
-
- outpen.put_value(tot*divisor);
- }
- outpen.dec_y(y);
- }
-}
-
-#else
-
-template<typename T1,typename T2> void
-vbox_blur(T1 pen,int w, int h, int length,T2 outpen)
-{
- int x,y;
- typename T1::iterator_y iter, end, biter,eiter;
-
- //print out the info I need to figure out if this is somehow a buffer overrun...
- /*char *beginptr=0,*endptr=0;
- {
- T1 ypen = pen;
- T1 endpen = pen;
- endpen.move(w,h);
- ypen.inc_y();
-
- T2 open = outpen,
- oepen = outpen;
- oepen.move(w,h);
- printf("V Blur (%d,%d,s-%d) in(%p,%p,st %d) out(%p,%p)\n",
- w,h,length,(char*)pen.x(),(char*)endpen.x(),(char*)ypen.x()-(char*)pen.x(),
- (char*)open.x(),(char*)oepen.x());
- }*/
- length=min(h-1,length);
-
- const float divisor(1.0f/(length*2+1));
- //const int div = (length*2+1);
-
- //since the filter range is 2*length+1 we need h-1
- for(x=0;x<w;x++,pen.inc_x(),outpen.inc_x())
- {
- iter=pen.y();
- end=pen.end_y();
-
- const typename T1::value_type bval = *iter;
- const typename T1::value_type eval = end[-1];
-
- typename T1::accumulator_type tot(bval*(length+1));
- //beginptr = (char*)&*iter; endptr = (char*)&*end;
-
- //printf("\nx line %d (%p,%p)\n",x,beginptr,endptr);
-
- //printf("Init %.3f - ",tot);
- for (y=0;y<length && iter!=end;y++)
- {
- tot+=iter[y];
- //printf("(%d,%p,+%.3f->%.3f),",y,&iter[y],iter[y],tot);
- }
- iter=pen.y();
-
- //printf(" tot=%.3f\n",tot);
-
- biter = iter+(-length-1); //get the first one...
- eiter = iter+length;
-
- //y will always be > length
- //T2 open = outpen;
- for (y=0;y<h && iter!=end;y++,++iter,++biter,++eiter,outpen.inc_y())
- {
- //printf("y line %d - (%f) ",y,tot);
-
- if (y>length)
- {
- typename T1::value_type &v = *biter;
- /*if( (char*)&v < beginptr ||
- (char*)&v >= endptr)
- printf("crap! %d (%p off %p)\n",y,(char*)&v,(char*)&*iter);*/
- tot -= v;
- //printf("[%.3f,",v);
- }
- else
- {
- tot -= bval;
- //printf("[%.3f,",bval);
- }
-
- if (y+length<h)
- {
- typename T1::value_type &v = *eiter;
- /*if( (char*)&v < beginptr ||
- (char*)&v >= endptr)
- printf("crap! %d (%p off %p)\n",y,(char*)&v,(char*)&*iter);*/
- tot += v;
- //printf("%.3f]",v);
- }
- else
- {
- tot += eval;
- //printf("%.3f]",eval);
- }
-
- //test handled in the previous case...
- //tot -= (y>length) ? *biter : bval;
- //tot += (y+length<h) ? *eiter : eval;
-
- //printf(" - %.3f\n",tot);
- outpen.put_value(tot*divisor);
- }
- outpen.dec_y(y);
- }
-}
-#endif
-
-template<typename T1,typename T2> void
-box_blur(T1 pen,int w, int h, int blur_w, int blur_h, T2 outpen)
- { hbox_blur(pen,w,h,blur_w,outpen); vbox_blur(pen,w,h,blur_h,outpen); }
-
-template<typename T1,typename T2> void
-box_blur(T1 pen,int w, int h, int size, T2 outpen)
- { hbox_blur(pen,w,h,size,outpen); vbox_blur(pen,w,h,size,outpen); }
-
-template<typename T1,typename T2> void
-hbox_blur(T1 begin,T1 end, int len,T2 outpen)
-{
- typename T1::difference_type size(end-begin);
- hbox_blur(begin,size.x,size.y,len,outpen);
-}
-
-template<typename T1,typename T2> void
-vbox_blur(T1 begin,T1 end, int len,T2 outpen)
-{
- typename T1::difference_type size(end-begin);
- vbox_blur(begin,size.x,size.y,len,outpen);
-}
-
-template<typename T1,typename T2> void
-box_blur(T1 begin,T1 end, int blur_w, int blur_h,T2 outpen)
-{
- typename T1::difference_type size(end-begin);
- hbox_blur(begin,size.x,size.y,blur_w,outpen); vbox_blur(begin,size.x,size.y,blur_h,outpen);
-}
-
-template<typename T1,typename T2> void
-box_blur(T1 begin,T1 end, int blursize,T2 outpen)
-{
- typename T1::difference_type size(end-begin);
- hbox_blur(begin,size.x,size.y,blursize,outpen); vbox_blur(begin,size.x,size.y,blursize,outpen);
-}
-
-_ETL_END_NAMESPACE
-
-/* === E X T E R N S ======================================================= */
-
-/* === E N D =============================================================== */
-
-#endif
projects / synfig.git / blobdiff