diff options
Diffstat (limited to 'editor/pnmpaste.c')
| -rw-r--r-- | editor/pnmpaste.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/editor/pnmpaste.c b/editor/pnmpaste.c new file mode 100644 index 00000000..38b316c6 --- /dev/null +++ b/editor/pnmpaste.c @@ -0,0 +1,185 @@ +/* pnmpaste.c - paste a rectangle into a portable anymap +** +** Copyright (C) 1989 by Jef Poskanzer. +** +** 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. This software is provided "as is" without express or +** implied warranty. +*/ + +#include "pm_c_util.h" +#include "pnm.h" + +int +main( argc, argv ) + int argc; + char* argv[]; + { + FILE* ifp1; + FILE* ifp2; + register xel* xelrow1; + register xel* xelrow2; + register xel* x1P; + register xel* x2P; + xelval maxval1, maxval2, newmaxval; + int argn, rows1, cols1, format1, x, y; + int rows2, cols2, format2, newformat, row; + register int col; + char function; + const char* const usage = "[-replace|-or|-and|-xor] frompnmfile x y [intopnmfile]"; + + pnm_init( &argc, argv ); + + argn = 1; + function = 'r'; + + /* Check for flags. */ + if ( argn < argc && argv[argn][0] == '-' && argv[argn][1] != '\0' ) + { + if ( pm_keymatch( argv[argn], "-replace", 2 ) ) + function = 'r'; + else if ( pm_keymatch( argv[argn], "-or", 2 ) ) + function = 'o'; + else if ( pm_keymatch( argv[argn], "-and", 2 ) ) + function = 'a'; + else if ( pm_keymatch( argv[argn], "-xor", 2 ) ) + function = 'x'; + else + pm_usage( usage ); + ++argn; + } + + if ( argn == argc ) + pm_usage( usage ); + ifp1 = pm_openr( argv[argn] ); + ++argn; + + if ( argn == argc ) + pm_usage( usage ); + if ( sscanf( argv[argn], "%d", &x ) != 1 ) + pm_usage( usage ); + ++argn; + if ( argn == argc ) + pm_usage( usage ); + if ( sscanf( argv[argn], "%d", &y ) != 1 ) + pm_usage( usage ); + ++argn; + + if ( argn != argc ) + { + ifp2 = pm_openr( argv[argn] ); + ++argn; + } + else + ifp2 = stdin; + + if ( argn != argc ) + pm_usage( usage ); + + pnm_readpnminit( ifp1, &cols1, &rows1, &maxval1, &format1 ); + xelrow1 = pnm_allocrow(cols1); + pnm_readpnminit( ifp2, &cols2, &rows2, &maxval2, &format2 ); + xelrow2 = pnm_allocrow(cols2); + + if ( x <= -cols2 ) + pm_error( + "x is too negative -- the second anymap has only %d cols", + cols2 ); + else if ( x >= cols2 ) + pm_error( + "x is too large -- the second anymap has only %d cols", + cols2 ); + if ( y <= -rows2 ) + pm_error( + "y is too negative -- the second anymap has only %d rows", + rows2 ); + else if ( y >= rows2 ) + pm_error( + "y is too large -- the second anymap has only %d rows", + rows2 ); + + if ( x < 0 ) + x += cols2; + if ( y < 0 ) + y += rows2; + + if ( x + cols1 > cols2 ) + pm_error( "x + width is too large by %d pixels", x + cols1 - cols2 ); + if ( y + rows1 > rows2 ) + pm_error( "y + height is too large by %d pixels", y + rows1 - rows2 ); + + newformat = MAX( PNM_FORMAT_TYPE(format1), PNM_FORMAT_TYPE(format2) ); + newmaxval = MAX( maxval1, maxval2 ); + + if ( function != 'r' && newformat != PBM_TYPE ) + pm_error( "no logical operations allowed for non-bitmaps" ); + + pnm_writepnminit( stdout, cols2, rows2, newmaxval, newformat, 0 ); + + for ( row = 0; row < rows2; ++row ) + { + pnm_readpnmrow( ifp2, xelrow2, cols2, maxval2, format2 ); + pnm_promoteformatrow( xelrow2, cols2, maxval2, format2, + newmaxval, newformat ); + + if ( row >= y && row < y + rows1 ) + { + pnm_readpnmrow( ifp1, xelrow1, cols1, maxval1, format1 ); + pnm_promoteformatrow( xelrow1, cols1, maxval1, format1, + newmaxval, newformat ); + for ( col = 0, x1P = xelrow1, x2P = &(xelrow2[x]); + col < cols1; ++col, ++x1P, ++x2P ) + { + register xelval b1, b2; + + switch ( function ) + { + case 'r': + *x2P = *x1P; + break; + + case 'o': + b1 = PNM_GET1( *x1P ); + b2 = PNM_GET1( *x2P ); + if ( b1 != 0 || b2 != 0 ) + PNM_ASSIGN1( *x2P, newmaxval ); + else + PNM_ASSIGN1( *x2P, 0 ); + break; + + case 'a': + b1 = PNM_GET1( *x1P ); + b2 = PNM_GET1( *x2P ); + if ( b1 != 0 && b2 != 0 ) + PNM_ASSIGN1( *x2P, newmaxval ); + else + PNM_ASSIGN1( *x2P, 0 ); + break; + + case 'x': + b1 = PNM_GET1( *x1P ); + b2 = PNM_GET1( *x2P ); + if ( ( b1 != 0 && b2 == 0 ) || ( b1 == 0 && b2 != 0 ) ) + PNM_ASSIGN1( *x2P, newmaxval ); + else + PNM_ASSIGN1( *x2P, 0 ); + break; + + default: + pm_error( "can't happen" ); + } + } + } + + pnm_writepnmrow( stdout, xelrow2, cols2, newmaxval, newformat, 0 ); + } + + pm_close( ifp1 ); + pm_close( ifp2 ); + pm_close( stdout ); + + exit( 0 ); + } |