| /*********************************************************** |
| Copyright 1991, 1992 by Stichting Mathematisch Centrum, Amsterdam, The |
| Netherlands. |
| |
| All Rights Reserved |
| |
| Permission to use, copy, modify, and distribute this software and its |
| documentation for any purpose and without fee is hereby granted, |
| 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 names of Stichting Mathematisch |
| Centrum or CWI not be used in advertising or publicity pertaining to |
| distribution of the software without specific, written prior permission. |
| |
| STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO |
| THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM 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. |
| |
| ******************************************************************/ |
| |
| /* imageopmodule - Various operations on pictures */ |
| |
| #ifdef sun |
| #define signed |
| #endif |
| |
| #include "allobjects.h" |
| #include "modsupport.h" |
| |
| #define CHARP(cp, xmax, x, y) ((char *)(cp+y*xmax+x)) |
| #define LONGP(cp, xmax, x, y) ((long *)(cp+4*(y*xmax+x))) |
| |
| static object *ImageopError; |
| |
| static object * |
| imageop_crop(self, args) |
| object *self; |
| object *args; |
| { |
| char *cp, *ncp; |
| long *nlp; |
| int len, size, x, y, newx1, newx2, newy1, newy2; |
| int ix, iy, xstep, ystep; |
| object *rv; |
| |
| if ( !getargs(args, "(s#iiiiiii)", &cp, &len, &size, &x, &y, |
| &newx1, &newy1, &newx2, &newy2) ) |
| return 0; |
| |
| if ( size != 1 && size != 4 ) { |
| err_setstr(ImageopError, "Size should be 1 or 4"); |
| return 0; |
| } |
| if ( len != size*x*y ) { |
| err_setstr(ImageopError, "String has incorrect length"); |
| return 0; |
| } |
| xstep = (newx1 < newx2)? 1 : -1; |
| ystep = (newy1 < newy2)? 1 : -1; |
| |
| rv = newsizedstringobject(NULL, (abs(newx2-newx1)+1)*(abs(newy2-newy1)+1)*size); |
| if ( rv == 0 ) |
| return 0; |
| ncp = (char *)getstringvalue(rv); |
| nlp = (long *)ncp; |
| newy2 += ystep; |
| newx2 += xstep; |
| for( iy = newy1; iy != newy2; iy+=ystep ) { |
| for ( ix = newx1; ix != newx2; ix+=xstep ) { |
| if ( iy < 0 || iy >= y || ix < 0 || ix >= x ) { |
| if ( size == 1 ) *ncp++ = 0; |
| else *nlp++ = 0; |
| } else { |
| if ( size == 1 ) *ncp++ = *CHARP(cp, x, ix, iy); |
| else *nlp++ = *LONGP(cp, x, ix, iy); |
| } |
| } |
| } |
| return rv; |
| } |
| |
| static object * |
| imageop_scale(self, args) |
| object *self; |
| object *args; |
| { |
| char *cp, *ncp; |
| long *nlp; |
| int len, size, x, y, newx, newy; |
| int ix, iy; |
| int oix, oiy; |
| object *rv; |
| |
| if ( !getargs(args, "(s#iiiii)", &cp, &len, &size, &x, &y, &newx, &newy) ) |
| return 0; |
| |
| if ( size != 1 && size != 4 ) { |
| err_setstr(ImageopError, "Size should be 1 or 4"); |
| return 0; |
| } |
| if ( len != size*x*y ) { |
| err_setstr(ImageopError, "String has incorrect length"); |
| return 0; |
| } |
| |
| rv = newsizedstringobject(NULL, newx*newy*size); |
| if ( rv == 0 ) |
| return 0; |
| ncp = (char *)getstringvalue(rv); |
| nlp = (long *)ncp; |
| for( iy = 0; iy < newy; iy++ ) { |
| for ( ix = 0; ix < newx; ix++ ) { |
| oix = ix * x / newx; |
| oiy = iy * y / newy; |
| if ( size == 1 ) *ncp++ = *CHARP(cp, x, oix, oiy); |
| else *nlp++ = *LONGP(cp, x, oix, oiy); |
| } |
| } |
| return rv; |
| } |
| |
| /* |
| static object * |
| imageop_mul(self, args) |
| object *self; |
| object *args; |
| { |
| char *cp, *ncp; |
| int len, size, x, y; |
| object *rv; |
| int i; |
| |
| if ( !getargs(args, "(s#iii)", &cp, &len, &size, &x, &y) ) |
| return 0; |
| |
| if ( size != 1 && size != 4 ) { |
| err_setstr(ImageopError, "Size should be 1 or 4"); |
| return 0; |
| } |
| if ( len != size*x*y ) { |
| err_setstr(ImageopError, "String has incorrect length"); |
| return 0; |
| } |
| |
| rv = newsizedstringobject(NULL, XXXX); |
| if ( rv == 0 ) |
| return 0; |
| ncp = (char *)getstringvalue(rv); |
| |
| |
| for ( i=0; i < len; i += size ) { |
| } |
| return rv; |
| } |
| */ |
| |
| static struct methodlist imageop_methods[] = { |
| { "crop", imageop_crop }, |
| { "scale", imageop_scale }, |
| { 0, 0 } |
| }; |
| |
| |
| void |
| initimageop() |
| { |
| object *m, *d; |
| m = initmodule("imageop", imageop_methods); |
| d = getmoduledict(m); |
| ImageopError = newstringobject("imageop.error"); |
| if ( ImageopError == NULL || dictinsert(d,"error",ImageopError) ) |
| fatal("can't define imageop.error"); |
| } |