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- /* xwdtopnm.c - read an X11 or X10 window dump file and write a portable anymap
- **
- ** Copyright (C) 1989, 1991 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 "pnm.h"
- #include "x10wd.h"
- #include "x11wd.h"
-
- static void getinit ARGS(( FILE* file, int* colsP, int* rowsP, int* padrightP, long* maxvalP, long* visualclassP, int* formatP, xel** colorsP ));
- static unsigned long getpixnum ARGS(( FILE* file ));
- static short bs_short ARGS(( short s ));
- static long bs_long ARGS(( long l ));
-
- static unsigned long red_mask, green_mask, blue_mask;
- static int bits_per_item, bits_used, bit_shift, bits_per_pixel;
- static char buf[4];
- static char* byteP;
- static short* shortP;
- static long* longP;
- static unsigned long pixel_mask;
- static int byte_swap, byte_order, bit_order;
-
- int
- main( argc, argv )
- int argc;
- char* argv[];
- {
- FILE* ifp;
- xel* xelrow;
- register xel* xP;
- xel* colors;
- int rows, cols, format, padright, row;
- register int col;
- long maxval, visualclass;
-
- pnm_init( &argc, argv );
-
- if ( argc > 2 )
- pm_usage( "[xwdfile]" );
-
- if ( argc == 2 )
- ifp = pm_openr( argv[1] );
- else
- ifp = stdin;
-
- getinit( ifp, &cols, &rows, &padright, &maxval, &visualclass, &format, &colors );
-
- pnm_writepnminit( stdout, cols, rows, (xelval) maxval, format, 0 );
- xelrow = pnm_allocrow( cols );
- switch ( PNM_FORMAT_TYPE(format) )
- {
- case PBM_TYPE:
- pm_message( "writing PBM file" );
- break;
-
- case PGM_TYPE:
- pm_message( "writing PGM file" );
- break;
-
- case PPM_TYPE:
- pm_message( "writing PPM file" );
- break;
-
- default:
- pm_error( "shouldn't happen" );
- }
-
- for ( row = 0; row < rows; ++row )
- {
- switch ( visualclass )
- {
- case StaticGray:
- case GrayScale:
- case StaticColor:
- case PseudoColor:
- for ( col = 0, xP = xelrow; col < cols; ++col, ++xP )
- *xP = colors[getpixnum( ifp )];
- break;
-
- case TrueColor:
- case DirectColor:
- for ( col = 0, xP = xelrow; col < cols; ++col, ++xP )
- {
- register unsigned long ul;
-
- ul = getpixnum( ifp );
- switch ( bits_per_pixel )
- {
- case 16:
- PPM_ASSIGN( *xP,
- ( ( ul & red_mask ) >> 0 ),
- ( ( ul & green_mask ) >> 5 ),
- ( ( ul & blue_mask ) >> 10 ) );
- break;
-
- case 24:
- case 32:
- PPM_ASSIGN( *xP, ( ( ul & 0xff0000 ) >> 16 ),
- ( ( ul & 0xff00 ) >> 8 ),
- ( ul & 0xff ) );
- break;
-
- default:
- pm_error( "True/Direct only supports 16, 24, and 32 bits" );
- }
- }
- break;
-
- default:
- pm_error( "unknown visual class" );
- }
- for ( col = 0; col < padright; ++col )
- (void) getpixnum( ifp );
- pnm_writepnmrow( stdout, xelrow, cols, (xelval) maxval, format, 0 );
- }
-
- pm_close( ifp );
- pm_close( stdout );
-
- exit( 0 );
- }
-
- static void
- getinit( file, colsP, rowsP, padrightP, maxvalP, visualclassP, formatP, colorsP )
- FILE* file;
- int* colsP;
- int* rowsP;
- int* padrightP;
- long* maxvalP;
- long* visualclassP;
- int* formatP;
- xel** colorsP;
- {
- int grayscale;
- /* Assume X11 headers are larger than X10 ones. */
- unsigned char header[sizeof(X11WDFileHeader)];
- X10WDFileHeader* h10P;
- X11WDFileHeader* h11P;
-
- byte_swap = 0;
- if ( PNM_MAXMAXVAL < 65535L )
- *maxvalP = PNM_MAXMAXVAL;
- else
- *maxvalP = 65535L;
- h10P = (X10WDFileHeader*) header;
- h11P = (X11WDFileHeader*) header;
- if ( sizeof(*h10P) > sizeof(*h11P) )
- pm_error(
- "ARGH! On this machine, X10 headers are larger than X11 headers!\n You will have to re-write xwdtopnm." );
-
- /* Read an X10 header. */
- if ( fread( &header[0], sizeof(*h10P), 1, file ) != 1 )
- pm_error( "couldn't read XWD file header" );
-
- if ( h10P->file_version == X10WD_FILE_VERSION ||
- bs_long( h10P->file_version ) == X10WD_FILE_VERSION )
- {
- int i;
- X10Color* x10colors;
-
- if ( h10P->file_version != X10WD_FILE_VERSION )
- {
- byte_swap = 1;
- h10P->header_size = bs_long( h10P->header_size );
- h10P->file_version = bs_long( h10P->file_version );
- h10P->display_type = bs_long( h10P->display_type );
- h10P->display_planes = bs_long( h10P->display_planes );
- h10P->pixmap_format = bs_long( h10P->pixmap_format );
- h10P->pixmap_width = bs_long( h10P->pixmap_width );
- h10P->pixmap_height = bs_long( h10P->pixmap_height );
- h10P->window_width = bs_short( h10P->window_width );
- h10P->window_height = bs_short( h10P->window_height );
- h10P->window_x = bs_short( h10P->window_x );
- h10P->window_y = bs_short( h10P->window_y );
- h10P->window_bdrwidth = bs_short( h10P->window_bdrwidth );
- h10P->window_ncolors = bs_short( h10P->window_ncolors );
- }
- for ( i = 0; i < h10P->header_size - sizeof(*h10P); ++i )
- if ( getc( file ) == EOF )
- pm_error( "couldn't read rest of X10 XWD file header" );
-
- /* Check whether we can handle this dump. */
- if ( h10P->window_ncolors > 256 )
- pm_error( "can't handle X10 window_ncolors > %d", 256 );
- if ( h10P->pixmap_format != ZFormat && h10P->display_planes != 1 )
- pm_error(
- "can't handle X10 pixmap_format %d with planes != 1",
- h10P->pixmap_format );
-
- grayscale = 1;
- if ( h10P->window_ncolors != 0 )
- {
- /* Read X10 colormap. */
- x10colors = (X10Color*) malloc(
- h10P->window_ncolors * sizeof(X10Color) );
- if ( x10colors == 0 )
- pm_error( "out of memory" );
- for ( i = 0; i < h10P->window_ncolors; ++i )
- {
- if ( fread( &x10colors[i], sizeof(X10Color), 1, file ) != 1 )
- pm_error( "couldn't read X10 XWD colormap" );
- if ( byte_swap )
- {
- x10colors[i].red = bs_short( x10colors[i].red );
- x10colors[i].green = bs_short( x10colors[i].green );
- x10colors[i].blue = bs_short( x10colors[i].blue );
- }
- if ( *maxvalP != 65535L )
- {
- x10colors[i].red =
- (long) x10colors[i].red * (long) *maxvalP / 65535L;
- x10colors[i].green =
- (long) x10colors[i].green * (long) *maxvalP / 65535L;
- x10colors[i].blue =
- (long) x10colors[i].blue * (long) *maxvalP / 65535L;
- }
- if ( x10colors[i].red != x10colors[i].green ||
- x10colors[i].green != x10colors[i].blue )
- grayscale = 0;
- }
- }
-
- if ( h10P->display_planes == 1 )
- {
- *formatP = PBM_TYPE;
- *visualclassP = StaticGray;
- *maxvalP = 1;
- *colorsP = pnm_allocrow( 2 );
- PNM_ASSIGN1( (*colorsP)[0], 0 );
- PNM_ASSIGN1( (*colorsP)[1], *maxvalP );
- *padrightP =
- ( ( h10P->pixmap_width + 15 ) / 16 ) * 16 - h10P->pixmap_width;
- bits_per_item = 16;
- bits_per_pixel = 1;
- }
- else if ( h10P->window_ncolors == 0 )
- { /* Must be grayscale. */
- *formatP = PGM_TYPE;
- *visualclassP = StaticGray;
- *maxvalP = ( 1 << h10P->display_planes ) - 1;
- *colorsP = pnm_allocrow( *maxvalP + 1 );
- for ( i = 0; i <= *maxvalP; ++i )
- PNM_ASSIGN1( (*colorsP)[i], i );
- *padrightP =
- ( ( h10P->pixmap_width + 15 ) / 16 ) * 16 - h10P->pixmap_width;
- bits_per_item = 16;
- bits_per_pixel = 1;
- }
- else
- {
- *colorsP = pnm_allocrow( h10P->window_ncolors );
- *visualclassP = PseudoColor;
- if ( grayscale )
- {
- *formatP = PGM_TYPE;
- for ( i = 0; i < h10P->window_ncolors; ++i )
- PNM_ASSIGN1( (*colorsP)[i], x10colors[i].red );
- }
- else
- {
- *formatP = PPM_TYPE;
- for ( i = 0; i < h10P->window_ncolors; ++i )
- PPM_ASSIGN(
- (*colorsP)[i], x10colors[i].red, x10colors[i].green,
- x10colors[i].blue);
- }
-
- *padrightP = h10P->pixmap_width & 1;
- bits_per_item = 8;
- bits_per_pixel = 8;
- }
- bits_used = bits_per_item;
- *colsP = h10P->pixmap_width;
- *rowsP = h10P->pixmap_height;
- if ( bits_per_pixel == sizeof(pixel_mask) * 8 )
- pixel_mask = -1;
- else
- pixel_mask = ( 1 << bits_per_pixel ) - 1;
- byte_order = MSBFirst;
- bit_order = LSBFirst;
- }
- else if ( h11P->file_version == X11WD_FILE_VERSION ||
- bs_long( h11P->file_version ) == X11WD_FILE_VERSION )
- {
- int i;
- X11XColor* x11colors;
-
- if ( fread( &header[sizeof(*h10P)], sizeof(*h11P) - sizeof(*h10P), 1, file ) != 1 )
- pm_error( "couldn't read X11 XWD file header" );
- if ( h11P->file_version != X11WD_FILE_VERSION )
- {
- byte_swap = 1;
- h11P->header_size = bs_long( h11P->header_size );
- h11P->file_version = bs_long( h11P->file_version );
- h11P->pixmap_format = bs_long( h11P->pixmap_format );
- h11P->pixmap_depth = bs_long( h11P->pixmap_depth );
- h11P->pixmap_width = bs_long( h11P->pixmap_width );
- h11P->pixmap_height = bs_long( h11P->pixmap_height );
- h11P->xoffset = bs_long( h11P->xoffset );
- h11P->byte_order = bs_long( h11P->byte_order );
- h11P->bitmap_unit = bs_long( h11P->bitmap_unit );
- h11P->bitmap_bit_order = bs_long( h11P->bitmap_bit_order );
- h11P->bitmap_pad = bs_long( h11P->bitmap_pad );
- h11P->bits_per_pixel = bs_long( h11P->bits_per_pixel );
- h11P->bytes_per_line = bs_long( h11P->bytes_per_line );
- h11P->visual_class = bs_long( h11P->visual_class );
- h11P->red_mask = bs_long( h11P->red_mask );
- h11P->green_mask = bs_long( h11P->green_mask );
- h11P->blue_mask = bs_long( h11P->blue_mask );
- h11P->bits_per_rgb = bs_long( h11P->bits_per_rgb );
- h11P->colormap_entries = bs_long( h11P->colormap_entries );
- h11P->ncolors = bs_long( h11P->ncolors );
- h11P->window_width = bs_long( h11P->window_width );
- h11P->window_height = bs_long( h11P->window_height );
- h11P->window_x = bs_long( h11P->window_x );
- h11P->window_y = bs_long( h11P->window_y );
- h11P->window_bdrwidth = bs_long( h11P->window_bdrwidth );
- }
- for ( i = 0; i < h11P->header_size - sizeof(*h11P); ++i )
- if ( getc( file ) == EOF )
- pm_error( "couldn't read rest of X11 XWD file header" );
-
- /* Check whether we can handle this dump. */
- if ( h11P->pixmap_depth > 24 )
- pm_error( "can't handle X11 pixmap_depth > 24" );
- if ( h11P->bits_per_rgb > 24 )
- pm_error( "can't handle X11 bits_per_rgb > 24" );
- if ( h11P->pixmap_format != ZPixmap && h11P->pixmap_depth != 1 )
- pm_error(
- "can't handle X11 pixmap_format %d with depth != 1",
- h11P->pixmap_format );
- if ( h11P->bitmap_unit != 8 && h11P->bitmap_unit != 16 &&
- h11P->bitmap_unit != 32 )
- pm_error(
- "X11 bitmap_unit (%d) is non-standard - can't handle",
- h11P->bitmap_unit );
-
- grayscale = 1;
- if ( h11P->ncolors > 0 )
- {
- /* Read X11 colormap. */
- x11colors = (X11XColor*) malloc(
- h11P->ncolors * sizeof(X11XColor) );
- if ( x11colors == 0 )
- pm_error( "out of memory" );
- if ( fread( x11colors, sizeof(X11XColor), h11P->ncolors, file ) !=
- h11P->ncolors )
- pm_error( "couldn't read X11 XWD colormap" );
- for ( i = 0; i < h11P->ncolors; ++i )
- {
- if ( byte_swap )
- {
- x11colors[i].red = bs_short( x11colors[i].red );
- x11colors[i].green = bs_short( x11colors[i].green );
- x11colors[i].blue = bs_short( x11colors[i].blue );
- }
- if ( *maxvalP != 65535L )
- {
- x11colors[i].red =
- (long) x11colors[i].red * (long) *maxvalP / 65535L;
- x11colors[i].green =
- (long) x11colors[i].green * (long) *maxvalP / 65535L;
- x11colors[i].blue =
- (long) x11colors[i].blue * (long) *maxvalP / 65535L;
- }
- if ( x11colors[i].red != x11colors[i].green ||
- x11colors[i].green != x11colors[i].blue )
- grayscale = 0;
- }
- }
-
- *visualclassP = h11P->visual_class;
- if ( *visualclassP == TrueColor || *visualclassP == DirectColor )
- {
- *formatP = PPM_TYPE;
- if ( h11P->bits_per_pixel == 16 )
- *maxvalP = 31;
- else
- *maxvalP = 255;
- }
- else if ( *visualclassP == StaticGray && h11P->bits_per_pixel == 1 )
- {
- *formatP = PBM_TYPE;
- *maxvalP = 1;
- *colorsP = pnm_allocrow( 2 );
- PNM_ASSIGN1( (*colorsP)[0], *maxvalP );
- PNM_ASSIGN1( (*colorsP)[1], 0 );
- }
- else if ( *visualclassP == StaticGray )
- {
- *formatP = PGM_TYPE;
- *maxvalP = ( 1 << h11P->bits_per_pixel ) - 1;
- *colorsP = pnm_allocrow( *maxvalP + 1 );
- for ( i = 0; i <= *maxvalP; ++i )
- PNM_ASSIGN1( (*colorsP)[i], i );
- }
- else
- {
- *colorsP = pnm_allocrow( h11P->ncolors );
- if ( grayscale )
- {
- *formatP = PGM_TYPE;
- for ( i = 0; i < h11P->ncolors; ++i )
- PNM_ASSIGN1( (*colorsP)[i], x11colors[i].red );
- }
- else
- {
- *formatP = PPM_TYPE;
- for ( i = 0; i < h11P->ncolors; ++i )
- PPM_ASSIGN(
- (*colorsP)[i], x11colors[i].red, x11colors[i].green,
- x11colors[i].blue);
- }
- }
-
- *colsP = h11P->pixmap_width;
- *rowsP = h11P->pixmap_height;
- *padrightP =
- h11P->bytes_per_line * 8 / h11P->bits_per_pixel -
- h11P->pixmap_width;
- bits_per_item = h11P->bitmap_unit;
- bits_used = bits_per_item;
- bits_per_pixel = h11P->bits_per_pixel;
- byte_order = h11P->byte_order;
- bit_order = h11P->bitmap_bit_order;
- if ( bits_per_pixel == sizeof(pixel_mask) * 8 )
- pixel_mask = -1;
- else
- pixel_mask = ( 1 << bits_per_pixel ) - 1;
- red_mask = h11P->red_mask;
- green_mask = h11P->green_mask;
- blue_mask = h11P->blue_mask;
- }
- else
- pm_error( "unknown XWD file version: %d", h11P->file_version );
-
- byteP = (char*) buf;
- shortP = (short*) buf;
- longP = (long*) buf;
- }
-
- static unsigned long
- getpixnum( file )
- FILE* file;
- {
- int n;
-
- if ( bits_used == bits_per_item )
- {
- switch ( bits_per_item )
- {
- case 8:
- *byteP = getc( file );
- break;
-
- case 16:
- if ( byte_order == MSBFirst )
- {
- if ( pm_readbigshort( file, shortP ) == -1 )
- pm_error( "error reading image" );
- }
- else
- {
- if ( pm_readlittleshort( file, shortP ) == -1 )
- pm_error( "error reading image" );
- }
- break;
-
- case 32:
- if ( byte_order == MSBFirst )
- {
- if ( pm_readbiglong( file, longP ) == -1 )
- pm_error( "error reading image" );
- }
- else
- {
- if ( pm_readlittlelong( file, longP ) == -1 )
- pm_error( "error reading image" );
- }
- break;
-
- default:
- pm_error( "can't happen" );
- }
- bits_used = 0;
-
- if ( bit_order == MSBFirst )
- bit_shift = bits_per_item - bits_per_pixel;
- else
- bit_shift = 0;
- }
-
- switch ( bits_per_item )
- {
- case 8:
- n = ( *byteP >> bit_shift) & pixel_mask;
- break;
-
- case 16:
- n = ( *shortP >> bit_shift) & pixel_mask;
- break;
-
- case 32:
- n = ( *longP >> bit_shift) & pixel_mask;
- break;
-
- default:
- pm_error( "can't happen" );
- }
-
- if ( bit_order == MSBFirst )
- bit_shift -= bits_per_pixel;
- else
- bit_shift += bits_per_pixel;
- bits_used += bits_per_pixel;
-
- return n;
- }
-
- /* Byte-swapping junk. */
-
- union cheat {
- long l;
- short s;
- unsigned char c[4];
- };
-
- #if __STDC__
- static short
- bs_short( short s )
- #else /*__STDC__*/
- static short
- bs_short( s )
- short s;
- #endif /*__STDC__*/
- {
- union cheat u;
- unsigned char t;
-
- u.s = s;
- t = u.c[0];
- u.c[0] = u.c[1];
- u.c[1] = t;
- return u.s;
- }
-
- #if __STDC__
- static long
- bs_long( long l )
- #else /*__STDC__*/
- static long
- bs_long( l )
- long l;
- #endif /*__STDC__*/
- {
- union cheat u;
- unsigned char t;
-
- u.l = l;
- t = u.c[0];
- u.c[0] = u.c[3];
- u.c[3] = t;
- t = u.c[1];
- u.c[1] = u.c[2];
- u.c[2] = t;
- return u.l;
- }
-