diff options
Diffstat (limited to 'urt/Runput.c')
| -rw-r--r-- | urt/Runput.c | 535 |
1 files changed, 293 insertions, 242 deletions
diff --git a/urt/Runput.c b/urt/Runput.c index 3bc562ac..d4281bb9 100644 --- a/urt/Runput.c +++ b/urt/Runput.c @@ -1,14 +1,14 @@ /* * This software is copyrighted as noted below. It may be freely copied, - * modified, and redistributed, provided that the copyright notice is + * modified, and redistributed, provided that the copyright notice is * preserved on all copies. - * + * * There is no warranty or other guarantee of fitness for this software, * it is provided solely "as is". Bug reports or fixes may be sent * to the author, who may or may not act on them as he desires. * * You may not include this software in a program or other software product - * without supplying the source, or without informing the end-user that the + * without supplying the source, or without informing the end-user that the * source is available for no extra charge. * * If you modify this software, you should include a notice giving the @@ -18,339 +18,390 @@ * Modified at BRL 16-May-88 by Mike Muuss to avoid Alliant STDC desire * to have all "void" functions so declared. */ -/* +/* * Runput.c - General purpose Run Length Encoding. - * - * Author: Spencer W. Thomas - * Computer Science Dept. - * University of Utah - * Date: Mon Aug 9 1982 + * + * Author: Spencer W. Thomas + * Computer Science Dept. + * University of Utah + * Date: Mon Aug 9 1982 * Copyright (c) 1982,1986 Spencer W. Thomas - * + * * $Id: Runput.c,v 3.0.1.1 1992/01/28 18:17:40 spencer Exp $ - * - * Modified by: Todd W. Fuqua - * Date: Jul 22 1984 + * + * Modified by: Todd W. Fuqua + * Date: Jul 22 1984 * convert to new RLE format to make room for larger frame buffers */ /* THIS IS WAY OUT OF DATE. See rle.5. * The output file format is: - * - * Word 0: A "magic" number. The top byte of the word contains - * the letter 'R' or the letter 'W'. 'W' indicates that - * only black and white information was saved. The bottom - * byte is one of the following: - * ' ': Means a straight "box" save, -S flag was given. - * 'B': Image saved with background color, clear screen to - * background before restoring image. - * 'O': Image saved in overlay mode. - * - * Words 1-6: The structure - * { short xpos, Lower left corner + * + * Word 0: A "magic" number. The top byte of the word contains + * the letter 'R' or the letter 'W'. 'W' indicates that + * only black and white information was saved. The bottom + * byte is one of the following: + * ' ': Means a straight "box" save, -S flag was given. + * 'B': Image saved with background color, clear screen to + * background before restoring image. + * 'O': Image saved in overlay mode. + * + * Words 1-6: The structure + * { short xpos, Lower left corner * ypos, - * xsize, Size of saved box + * xsize, Size of saved box * ysize; - * char rgb[3]; Background color - * char map; flag for map presence + * char rgb[3]; Background color + * char map; flag for map presence * } - * - * If the map flag is non-zero, then the color map will follow as + * + * If the map flag is non-zero, then the color map will follow as * 3*256 16 bit words, first the red map, then the green map, and * finally the blue map. - * + * * Following the setup information is the Run Length Encoded image. * Each instruction consists of a 4-bit opcode, a 12-bit datum and * possibly one or more following words (all words are 16 bits). The * instruction opcodes are: - * + * * SkipLines (1): The bottom 10 bits are an unsigned number to be added to - * current Y position. - * + * current Y position. + * * SetColor (2): The datum indicates which color is to be loaded with - * the data described by the following ByteData and - * RunData instructions. 0->red, 1->green, 2->blue. The - * operation also resets the X position to the initial - * X (i.e. a carriage return operation is performed). - * + * the data described by the following ByteData and + * RunData instructions. 0->red, 1->green, 2->blue. The + * operation also resets the X position to the initial + * X (i.e. a carriage return operation is performed). + * * SkipPixels (3): The bottom 10 bits are an unsigned number to be - * added to the current X position. - * + * added to the current X position. + * * ByteData (5): The datum is one less than the number of bytes of - * color data following. If the number of bytes is - * odd, a filler byte will be appended to the end of - * the byte string to make an integral number of 16-bit - * words. The bytes are in PDP-11 order. The X - * position is incremented to follow the last byte of - * data. - * - * RunData (6): The datum is one less than the run length. The - * following word contains (in its lower 8 bits) the - * color of the run. The X position is incremented to - * follow the last byte in the run. + * color data following. If the number of bytes is + * odd, a filler byte will be appended to the end of + * the byte string to make an integral number of 16-bit + * words. The bytes are in PDP-11 order. The X + * position is incremented to follow the last byte of + * data. + * + * RunData (6): The datum is one less than the run length. The + * following word contains (in its lower 8 bits) the + * color of the run. The X position is incremented to + * follow the last byte in the run. */ -#include <string.h> -#include <stdio.h> +#include <assert.h> +#include <string.h> +#include <stdio.h> + +#include "mallocvar.h" +#include "pm.h" -#include "rle_put.h" -#include "rle.h" -#include "rle_code.h" -#include "vaxshort.h" -#include "Runput.h" +#include "rle_put.h" +#include "rle.h" +#include "rle_code.h" +#include "vaxshort.h" +#include "Runput.h" -#define UPPER 255 /* anything bigger ain't a byte */ +#define UPPER 255 /* anything bigger ain't a byte */ /* * Macros to make writing instructions with correct byte order easier. */ /* Write a two-byte value in little_endian order. */ -#define put16(a) (putc((a)&0xff,rle_fd),putc((char)(((a)>>8)&0xff),rle_fd)) +#define put16(a) (putc((a)&0xff,rle_fd),putc((char)(((a)>>8)&0xff),rle_fd)) /* short instructions */ -#define mk_short_1(oper,a1) /* one argument short */ \ +#define mk_short_1(oper,a1) /* one argument short */ \ putc(oper,rle_fd), putc((char)a1,rle_fd) -#define mk_short_2(oper,a1,a2) /* two argument short */ \ +#define mk_short_2(oper,a1,a2) /* two argument short */ \ putc(oper,rle_fd), putc((char)a1,rle_fd), put16(a2) /* long instructions */ -#define mk_long_1(oper,a1) /* one argument long */ \ +#define mk_long_1(oper,a1) /* one argument long */ \ putc((char)(LONG|oper),rle_fd), putc('\0', rle_fd), put16(a1) -#define mk_long_2(oper,a1,a2) /* two argument long */ \ - putc((char)(LONG|oper),rle_fd), putc('\0', rle_fd), \ - put16(a1), put16(a2) +#define mk_long_2(oper,a1,a2) /* two argument long */ \ + putc((char)(LONG|oper),rle_fd), putc('\0', rle_fd), \ + put16(a1), put16(a2) /* choose between long and short format instructions */ /* NOTE: these macros can only be used where a STATEMENT is legal */ -#define mk_inst_1(oper,a1) /* one argument inst */ \ +#define mk_inst_1(oper,a1) /* one argument inst */ \ if (a1>UPPER) (mk_long_1(oper,a1)); else (mk_short_1(oper,a1)) -#define mk_inst_2(oper,a1,a2) /* two argument inst */ \ +#define mk_inst_2(oper,a1,a2) /* two argument inst */ \ if (a1>UPPER) (mk_long_2(oper,a1,a2)); else (mk_short_2(oper,a1,a2)) -/* +/* * Opcode definitions */ -#define RSkipLines(n) mk_inst_1(RSkipLinesOp,(n)) +#define RSkipLines(n) mk_inst_1(RSkipLinesOp,(n)) -#define RSetColor(c) mk_short_1(RSetColorOp,(c)) - /* has side effect of performing */ - /* "carriage return" action */ +#define RSetColor(c) mk_short_1(RSetColorOp,(c)) + /* has side effect of performing */ + /* "carriage return" action */ -#define RSkipPixels(n) mk_inst_1(RSkipPixelsOp,(n)) +#define RSkipPixels(n) mk_inst_1(RSkipPixelsOp,(n)) -#define RNewLine RSkipLines(1) +#define RNewLine RSkipLines(1) -#define RByteData(n) mk_inst_1(RByteDataOp,n) - /* followed by ((n+1)/2)*2 bytes */ - /* of data. If n is odd, last */ - /* byte will be ignored */ - /* "cursor" is left at pixel */ - /* following last pixel written */ +#define RByteData(n) mk_inst_1(RByteDataOp,n) + /* followed by ((n+1)/2)*2 bytes */ + /* of data. If n is odd, last */ + /* byte will be ignored */ + /* "cursor" is left at pixel */ + /* following last pixel written */ -#define RRunData(n,c) mk_inst_2(RRunDataOp,(n),(c)) - /* next word contains color data */ - /* "cursor" is left at pixel after */ - /* end of run */ +#define RRunData(n,c) mk_inst_2(RRunDataOp,(n),(c)) + /* next word contains color data */ + /* "cursor" is left at pixel after */ + /* end of run */ + +#define REOF mk_inst_1(REOFOp,0) + /* Really opcode only */ -#define REOF mk_inst_1(REOFOp,0) - /* Really opcode only */ -/***************************************************************** - * TAG( RunSetup ) - * Put out initial setup data for RLE files. - */ void -RunSetup(rle_hdr * the_hdr) -{ +RunSetup(rle_hdr * const hdrP) { +/*---------------------------------------------------------------------------- + Put out initial setup data for RLE files. +-----------------------------------------------------------------------------*/ + FILE * const rle_fd = hdrP->rle_file; + struct XtndRsetup setup; - register FILE * rle_fd = the_hdr->rle_file; - put16( RLE_MAGIC ); + put16(RLE_MAGIC); - if ( the_hdr->background == 2 ) - setup.h_flags = H_CLEARFIRST; - else if ( the_hdr->background == 0 ) - setup.h_flags = H_NO_BACKGROUND; + if (hdrP->background == 2) + setup.h_flags = H_CLEARFIRST; + else if (hdrP->background == 0) + setup.h_flags = H_NO_BACKGROUND; else - setup.h_flags = 0; - if ( the_hdr->alpha ) - setup.h_flags |= H_ALPHA; - if ( the_hdr->comments != NULL && *the_hdr->comments != NULL ) - setup.h_flags |= H_COMMENT; - - setup.h_ncolors = the_hdr->ncolors; - setup.h_pixelbits = 8; /* Grinnell dependent */ - if ( the_hdr->ncmap > 0 && the_hdr->cmap == NULL ) - { - fprintf( stderr, - "%s: Color map of size %d*%d specified, but not supplied, writing %s\n", - the_hdr->cmd, the_hdr->ncmap, (1 << the_hdr->cmaplen), - the_hdr->file_name ); - the_hdr->ncmap = 0; + setup.h_flags = 0; + + if (hdrP->alpha) + setup.h_flags |= H_ALPHA; + + if (hdrP->comments != NULL && *hdrP->comments != NULL) + setup.h_flags |= H_COMMENT; + + if (hdrP->ncolors > 255) + pm_error("Too many colors (%u) for RLE format. Maximum is 255", + hdrP->ncolors); + + setup.h_ncolors = (unsigned char)hdrP->ncolors; + setup.h_pixelbits = 8; /* Grinnell dependent */ + + if ((hdrP->cmaplen) > sizeof(UINT_MAX) * 8 - 1) { + pm_error("Color map size logarithm (%u) " + "is too large for computation. Maximum is %lu", + hdrP->cmaplen, sizeof(UINT_MAX) * 8 - 2); } - setup.h_cmaplen = the_hdr->cmaplen; /* log2 of color map size */ - setup.h_ncmap = the_hdr->ncmap; /* no of color channels */ - vax_pshort(setup.hc_xpos,the_hdr->xmin); - vax_pshort(setup.hc_ypos,the_hdr->ymin); - vax_pshort(setup.hc_xlen,the_hdr->xmax - the_hdr->xmin + 1); - vax_pshort(setup.hc_ylen,the_hdr->ymax - the_hdr->ymin + 1); - fwrite((char *)&setup, SETUPSIZE, 1, rle_fd); - if ( the_hdr->background != 0 ) - { - register int i; - register rle_pixel *background = - (rle_pixel *)malloc( (unsigned)(the_hdr->ncolors + 1) ); - register int *bg_color; - /* - * If even number of bg color bytes, put out one more to get to - * 16 bit boundary. - */ - bg_color = the_hdr->bg_color; - for ( i = 0; i < the_hdr->ncolors; i++ ) - background[i] = *bg_color++; - /* Extra byte, if written, should be 0. */ - background[i] = 0; - fwrite((char *)background, (the_hdr->ncolors / 2) * 2 + 1, 1, rle_fd); - free( background ); + /* We need to be able to count 2 bytes for each channel of each entry + in the color map: + */ + if (hdrP->ncmap > 0 && 1 << hdrP->cmaplen > UINT_MAX/2/hdrP->ncmap) { + pm_error("Color map length %u and number of color channels in the " + "color map %u are too large for computation", + 1 << hdrP->cmaplen, hdrP->ncmap); } - else - putc( '\0', rle_fd ); - if (the_hdr->ncmap > 0) - { - /* Big-endian machines are harder */ - register int i, nmap = (1 << the_hdr->cmaplen) * - the_hdr->ncmap; - register char *h_cmap = (char *)malloc( nmap * 2 ); - if ( h_cmap == NULL ) - { - fprintf( stderr, - "%s: Malloc failed for color map of size %d, writing %s\n", - the_hdr->cmd, nmap, the_hdr->file_name ); - exit( 1 ); - } - for ( i = 0; i < nmap; i++ ) - vax_pshort( &h_cmap[i*2], the_hdr->cmap[i] ); - - fwrite( h_cmap, nmap, 2, rle_fd ); - free( h_cmap ); + + if (hdrP->ncmap > 255) + pm_error("Too many color channels in the color map (%u) " + "for the RLE format. Maximum is 255", hdrP->ncmap); + setup.h_ncmap = hdrP->ncmap; /* no of color channels */ + + if (hdrP->ncmap > 0 && hdrP->cmap == NULL) { + pm_message("Warning: " + "Color map of size %d*%d specified, but not supplied, " + "writing '%s'", + hdrP->ncmap, (1 << hdrP->cmaplen), hdrP->file_name); + hdrP->ncmap = 0; + } + setup.h_cmaplen = (unsigned char)hdrP->cmaplen; + + vax_pshort(setup.hc_xpos,hdrP->xmin); + vax_pshort(setup.hc_ypos,hdrP->ymin); + vax_pshort(setup.hc_xlen,hdrP->xmax - hdrP->xmin + 1); + vax_pshort(setup.hc_ylen,hdrP->ymax - hdrP->ymin + 1); + + fwrite((char *)&setup, SETUPSIZE, 1, rle_fd); + + if (hdrP->background != 0) { + unsigned int i; + rle_pixel * background; + int * bg_color; + + assert(hdrP->ncolors < UINT_MAX); + + MALLOCARRAY_NOFAIL(background, hdrP->ncolors + 1); + + /* If even number of bg color bytes, put out one more to get to + 16 bit boundary. + */ + + for (i = 0, bg_color = hdrP->bg_color; i < hdrP->ncolors; ++i) + background[i] = *bg_color++; + + /* Extra byte; if written, should be 0. */ + background[i] = 0; + + fwrite(background, (hdrP->ncolors / 2) * 2 + 1, 1, rle_fd); + + free(background); + } else + putc('\0', rle_fd); + + if (hdrP->ncmap > 0) { + /* Big-endian machines are harder */ + unsigned int const nmap = (1 << hdrP->cmaplen) * hdrP->ncmap; + + unsigned char * h_cmap; + unsigned int i; + + MALLOCARRAY(h_cmap, nmap * 2); + + if (!h_cmap) { + pm_error("Failed to allocate memory for color map of size %u, " + "writing '%s'", + nmap, hdrP->file_name); + } + for (i = 0; i < nmap; ++i) + vax_pshort(&h_cmap[i*2], hdrP->cmap[i]); + + fwrite(h_cmap, nmap, 2, rle_fd); + + free(h_cmap); } /* Now write out comments if given */ - if ( setup.h_flags & H_COMMENT ) - { - int comlen; - register CONST_DECL char ** com_p; - - /* Get the total length of comments */ - comlen = 0; - for ( com_p = the_hdr->comments; *com_p != NULL; com_p++ ) - comlen += 1 + strlen( *com_p ); - - put16( comlen ); - for ( com_p = the_hdr->comments; *com_p != NULL; com_p++ ) - fwrite( *com_p, 1, strlen( *com_p ) + 1, rle_fd ); - - if ( comlen & 1 ) /* if odd length, round up */ - putc( '\0', rle_fd ); + if (setup.h_flags & H_COMMENT) { + unsigned int comlen; + const char ** comP; + + /* Get the total length of comments */ + for (comP = hdrP->comments, comlen = 0; *comP != NULL; ++comP) + comlen += 1 + strlen(*comP); + + put16(comlen); + + for (comP = hdrP->comments; *comP != NULL; ++comP) + fwrite(*comP, 1, strlen(*comP) + 1, rle_fd); + + if (comlen & 0x1) /* if odd length, round up */ + putc('\0', rle_fd); } } -/***************************************************************** - * TAG( RunSkipBlankLines ) - * Skip one or more blank lines in the RLE file. - */ + + void -RunSkipBlankLines(int nblank, rle_hdr * the_hdr) -{ - register FILE * rle_fd = the_hdr->rle_file; +RunSkipBlankLines(unsigned int const nblank, + rle_hdr * const hdrP) { +/*---------------------------------------------------------------------------- + Skip one or more blank lines in the RLE file. +-----------------------------------------------------------------------------*/ + FILE * const rle_fd = hdrP->rle_file; + RSkipLines(nblank); } -/***************************************************************** - * TAG( RunSetColor ) - * Select a color and do carriage return. - * color: 0 = Red, 1 = Green, 2 = Blue. - */ + + void -RunSetColor(int c, rle_hdr * the_hdr) -{ - register FILE * rle_fd = the_hdr->rle_file; +RunSetColor(int const c, + rle_hdr * const hdrP) { +/*---------------------------------------------------------------------------- + Select a color and do carriage return. + color: 0 = Red, 1 = Green, 2 = Blue. +-----------------------------------------------------------------------------*/ + FILE * const rle_fd = hdrP->rle_file; + RSetColor(c); } -/***************************************************************** - * TAG( RunSkipPixels ) - * Skip a run of background. - */ -/* ARGSUSED */ + void -RunSkipPixels(int nskip, int last, int wasrun, rle_hdr * the_hdr) -{ - register FILE * rle_fd = the_hdr->rle_file; - if (! last && nskip > 0) - { - RSkipPixels(nskip); +RunSkipPixels(unsigned int const nskip, + int const last, + int const wasrun, + rle_hdr * const hdrP) { +/*---------------------------------------------------------------------------- + Skip a run of background. +-----------------------------------------------------------------------------*/ + FILE * const rle_fd = hdrP->rle_file; + + if (!last && nskip > 0) { + RSkipPixels(nskip); } } -/***************************************************************** - * TAG( RunNewScanLine ) - * Perform a newline action. Since CR is implied by the Set Color - * operation, only generate code if the newline flag is true. - */ + + void -RunNewScanLine(int flag, rle_hdr * the_hdr) -{ - register FILE * rle_fd = the_hdr->rle_file; - if (flag) - { - RNewLine; +RunNewScanLine(int const flag, + rle_hdr * const hdrP) { +/*---------------------------------------------------------------------------- + Perform a newline action. Since CR is implied by the Set Color operation, + only generate code if the newline flag is true. +-----------------------------------------------------------------------------*/ + FILE * const rle_fd = hdrP->rle_file; + + if (flag) { + RNewLine; } } -/***************************************************************** - * TAG( Runputdata ) - * Put one or more pixels of byte data into the output file. - */ + + void -Runputdata(rle_pixel * buf, int n, rle_hdr * the_hdr) -{ - register FILE * rle_fd = the_hdr->rle_file; - if (n == 0) - return; - - RByteData(n-1); - fwrite((char *)buf, n, 1, rle_fd); - if ( n & 1 ) - putc( 0, rle_fd ); +Runputdata(rle_pixel * const buf, + unsigned int const n, + rle_hdr * const hdrP) { +/*---------------------------------------------------------------------------- + Put one or more pixels of byte data into the output file. +-----------------------------------------------------------------------------*/ + FILE * const rle_fd = hdrP->rle_file; + + if (n != 0) { + RByteData(n - 1); + + fwrite(buf, n, 1, rle_fd); + + if (n & 0x1) + putc(0, rle_fd); + } } -/***************************************************************** - * TAG( Runputrun ) - * Output a single color run. - */ -/* ARGSUSED */ + void -Runputrun(int color, int n, int last, rle_hdr * the_hdr) -{ - register FILE * rle_fd = the_hdr->rle_file; - RRunData(n-1,color); +Runputrun(int const color, + unsigned int const n, + int const last, + rle_hdr * const hdrP) { +/*---------------------------------------------------------------------------- + Output a single color run. +-----------------------------------------------------------------------------*/ + FILE * const rle_fd = hdrP->rle_file; + + RRunData(n - 1, color); } -/***************************************************************** - * TAG( RunputEof ) - * Output an EOF opcode - */ + void -RunputEof(rle_hdr * the_hdr) -{ - register FILE * rle_fd = the_hdr->rle_file; +RunputEof(rle_hdr * const hdrP) { +/*---------------------------------------------------------------------------- + Output an EOF opcode +-----------------------------------------------------------------------------*/ + FILE * const rle_fd = hdrP->rle_file; + REOF; } + + |