367 lines
9.3 KiB
C
367 lines
9.3 KiB
C
/*
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* $XConsortium: x2pmp.c,v 1.13 91/07/25 17:56:32 rws Exp $
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*/
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/* x2pmp.c: Translate xwd window dump format into PMP format for the
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* IBM 3812 PagePrinter.
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*/
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#include <stdio.h>
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#include <math.h>
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#include <X11/Xlib.h>
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#include <X11/XWDFile.h>
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#include <X11/Xfuncs.h>
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#include <errno.h>
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#include <string.h>
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#include "pmp.h"
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#include "xpr.h"
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#define max_(a, b) ((a) > (b) ? (a) : (b))
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#define min_(a, b) ((a) < (b) ? (a) : (b))
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#define abs_(a) ((a) < 0 ? -(a) : (a))
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/* Local prototypes */
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static unsigned char *magnification_table(int scale);
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static int bits_set(int n);
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static void leave(const char *s) _X_NORETURN;
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static void p_move_abs(FILE *p, int x, int y);
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static void p_save_cursor(FILE *p, int reg);
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static void p_restore_cursor(FILE *p, int reg);
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static void p_set_orientation(FILE *p, enum orientation orient);
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static void p_bitmap(
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FILE *p,
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unsigned int h, int w,
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unsigned long buflen,
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unsigned char *buf);
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static int plane = 0;
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#define FONT_HEIGHT 40
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#define FONT_HEIGHT_PIXELS (FONT_HEIGHT*75/PPI)
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#define FONT_WIDTH 24
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void x2pmp(FILE *in, FILE *out,
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int scale,
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int p_width, int p_length, int x_pos, int y_pos, /* in pels (units of PPI) */
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char *head, char *foot,
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enum orientation orient,
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int invert)
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{
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unsigned char *buffer, *win_name;
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unsigned int win_name_size, width, height, ncolors;
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unsigned int buffer_size, one_plane_size, byte_width, fixed_width;
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int no_of_bits;
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unsigned long swaptest = 1;
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XWDFileHeader header;
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/* Read header from file */
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if (fread((char *)&header, sizeof(header), 1, in) != 1) {
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if (feof(in))
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return;
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else
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leave("fread");
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}
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if (*(char *) &swaptest)
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_swaplong((char *) &header, sizeof(header));
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if (header.file_version != XWD_FILE_VERSION) {
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fprintf(stderr,"%s: file format version %d, not %d\n", progname,
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(int)header.file_version, XWD_FILE_VERSION);
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}
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win_name_size = abs_(header.header_size - sizeof(header));
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if ((win_name = (unsigned char *)
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calloc(win_name_size, (unsigned) sizeof(char))) == NULL)
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leave("Can't calloc window name storage.");
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/* Read window name from file */
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if (fread((char *) win_name, sizeof(char), (int) win_name_size, in) !=
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win_name_size)
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leave("Unable to read window name from dump file.");
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DEBUG(>= 1)
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fprintf(stderr,"win_name =%s\n", win_name);
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width = header.pixmap_width;
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height = header.pixmap_height;
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fixed_width = 8 * (byte_width = header.bytes_per_line);
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one_plane_size = byte_width * height;
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buffer_size = one_plane_size *
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((header.pixmap_format == ZPixmap)? header.pixmap_depth: 1);
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/* Determine orientation and scale if not specified */
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if (orient == UNSPECIFIED)
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orient = (fixed_width <= height)? PORTRAIT: LANDSCAPE;
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if (scale <= 0) {
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int real_height = height;
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if (head) real_height += FONT_HEIGHT_PIXELS << 1;
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if (foot) real_height += FONT_HEIGHT_PIXELS << 1;
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switch(orient) {
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default:
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case PORTRAIT:
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case UPSIDE_DOWN:
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scale = min_((p_width - 2*x_pos) / fixed_width,
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(p_length - 2*y_pos) / real_height);
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break;
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case LANDSCAPE:
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case LANDSCAPE_LEFT:
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scale = min_((p_length - 2*y_pos) / fixed_width,
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(p_width - 2*x_pos) / real_height);
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break;
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}
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if (scale <= 0)
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leave("PixMap doesn't fit on page.");
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else DEBUG(>1)
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fprintf(stderr, "scaling by %d to yield %d x %d image\n",
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scale, fixed_width*scale, height*scale);
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}
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ncolors = header.ncolors;
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if (ncolors) {
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int i;
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XColor *colors = (XColor *)malloc((unsigned) (header.ncolors * sizeof(XColor)));
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if (fread((char *)colors, sizeof(XColor), ncolors, in) != ncolors)
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leave("Unable to read colormap from dump file.");
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if (*(char *) &swaptest) {
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for (i = 0; i < ncolors; i++) {
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_swaplong((char *) &colors[i].pixel, (long)sizeof(long));
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_swapshort((char *) &colors[i].red, (long) (3 * sizeof(short)));
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}
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}
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if (ncolors == 2 && INTENSITY(&colors[0]) > INTENSITY(&colors[1]))
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invert = !invert;
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free( colors );
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}
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invert = !invert; /* 3812 puts ink (i.e. black) on 1-bits */
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if ((buffer = (unsigned char *) calloc(buffer_size, 1)) == NULL)
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leave("Can't calloc data buffer.");
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bzero((char *) buffer, (int) buffer_size);
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/* Read bitmap from file */
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if (fread((char *) buffer, sizeof(char), (int) buffer_size, in)
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!= buffer_size)
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leave("Unable to read pixmap from dump file.");
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if (header.bitmap_bit_order == LSBFirst)
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{
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unsigned char bitswap[256], *bp;
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int c;
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for(c = 256; c--;) {
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bitswap[c] = ((c & 01) << 7) + ((c & 02) << 5) + ((c & 04) << 3) +
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((c & 010) << 1) + ((c & 020) >> 1) + ((c & 040) >> 3) +
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((c & 0100) >> 5) + ((c & 0200) >> 7);
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if (invert)
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bitswap[c] = ~bitswap[c];
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}
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/* Here's where we do the bitswapping. */
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for(bp = buffer+buffer_size; bp-- > buffer;)
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*bp = bitswap[*bp];
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}
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else if (invert) {
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unsigned char *bp;
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for(bp = buffer+buffer_size; bp-- > buffer;)
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*bp = ~*bp;
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}
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/* we don't want the last bits up to the byte/word alignment set */
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if ((no_of_bits = fixed_width - width)) {
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int i, j, mask = ~bits_set(no_of_bits % 8);
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for(i = 0; i < height; i++) {
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unsigned char *s = buffer + (i+1) * byte_width ;
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for(j = no_of_bits / 8; j--;)
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*--s = 0;
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*--s &= mask;
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}
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}
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DEBUG(>= 1)
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fprintf(stderr,"read %d bytes for a %d (%d bytes) x %d image\n",
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buffer_size, (int) width, byte_width, (int) height);
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/* Scale the bitmap */
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if (scale > 1) {
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unsigned char *tbl = magnification_table(scale);
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unsigned char *scale_buf;
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int i, j, k;
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if ((scale_buf = (unsigned char *)
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calloc((unsigned) (buffer_size *= scale*scale), sizeof(char)))
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== NULL)
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leave("Can't calloc scaled buffer.");
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for(i = 0; i < height; i++) {
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unsigned char *src, *ss;
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src = buffer + i * byte_width ;
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ss = scale_buf + i * scale * scale * byte_width;
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for(j = 0; j < byte_width; j++) {
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unsigned char *dst = ss+j*scale;
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unsigned char *expansion = tbl+scale*src[j];
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for(k = 0; k < scale; k++, dst += byte_width*scale) {
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memmove((char *) dst, (char *) expansion, scale);
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}
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}
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}
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free((char *) buffer);
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free((char *) tbl);
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buffer = scale_buf;
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byte_width *= scale;
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width *= scale;
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fixed_width *= scale;
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height *= scale;
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one_plane_size *= scale*scale;
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}
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DEBUG(==3) {
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int i, j, k;
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unsigned char *s;
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fprintf(stderr, "dumping %d x %d grid\n", fixed_width, height);
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for(i = 0; i < height; i++) {
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s = buffer + i * byte_width ;
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for(j = 0; j < byte_width; j++)
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for(k = 8; k--;)
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(void) putc((s[j] & 1<<k)? '*': '-', stderr);
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(void) putc('\n', stderr);
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}
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}
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p_set_orientation(out, orient);
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p_restore_cursor(out, 0);
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p_save_cursor(out, 3);
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if (head != NULL) {
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p_move_abs( out, x_pos + (width - strlen(foot)*FONT_WIDTH) >> 1,
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y_pos - FONT_HEIGHT );
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fprintf(out, "%s\n", head);
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}
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if (foot != NULL) {
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p_move_abs( out, x_pos + (width - strlen(foot)*FONT_WIDTH) >> 1,
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y_pos + height + (FONT_HEIGHT << 1) );
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fprintf(out, "%s\n", foot);
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}
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p_move_abs(out, x_pos, y_pos);
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p_bitmap(out, height, fixed_width, (unsigned long) one_plane_size,
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buffer + plane * one_plane_size);
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free((char *) win_name);
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free((char *) buffer);
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}
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static
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unsigned char *magnification_table(int scale)
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{
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unsigned char *tbl;
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int c;
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if ((tbl = (unsigned char *)
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calloc((unsigned) (scale*256), sizeof(char))) == NULL)
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leave("Can't calloc magnification table.");
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bzero((char *) tbl, scale*256);
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for(c = 256; c--;) {
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int b = c, bit;
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unsigned char *entry = tbl+c*scale;
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while (b) {
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int i, last, mask;
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bit = 1;
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mask = b;
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while (! (mask & 1)) {
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bit++;
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mask = mask >> 1;
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}
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last = scale*(bit-1);
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for(i = scale*bit; i-- > last ;)
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entry[(scale - 1) - i / 8] |= 1 << (i % 8);
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b &= ~(1 << bit-1);
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}
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}
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return tbl;
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}
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/* returns 2^n-1, i.e. a number with bits n-1 through 0 set.
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* (zero for n == 0) */
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static
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int bits_set(int n)
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{
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int ans = 0;
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while(n--)
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ans |= 1 << n;
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return ans;
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}
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static
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void leave(const char *s)
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{
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fprintf(stderr, "\n%s: ", progname);
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if (errno != 0)
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perror(s);
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else
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fprintf(stderr, "%s", s);
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fprintf(stderr, "\n");
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exit(EXIT_FAILURE);
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}
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/* move to coordinates x, y (in pels) */
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static
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void p_move_abs(FILE *p, int x, int y)
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{
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if (x >= 0) {
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PMP(p, 3);
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(void) putc('\340', p);
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p_wput(x, p);
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}
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if (y >= 0) {
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PMP(p, 3);
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(void) putc('\341', p);
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p_wput(y, p);
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}
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}
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/* save current cursor position into (printer) register reg */
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static
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void p_save_cursor(FILE *p, int reg)
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{
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PMP(p, 1);
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(void) putc(reg + '\200', p);
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}
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/* restore current cursor position from (printer) register reg */
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static
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void p_restore_cursor(FILE *p, int reg)
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{
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PMP(p, 1);
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(void) putc(reg + '\220', p);
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}
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/* set the page orientation to orient (see pmp.h) */
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static
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void p_set_orientation(FILE *p, enum orientation orient)
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{
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PMP(p, 2);
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fprintf(p, "\322%c", (int) orient);
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}
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/* generate bitmap */
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static
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void p_bitmap(
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FILE *p,
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unsigned int h, int w,
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unsigned long buflen,
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unsigned char *buf)
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{
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PMP(p, 9);
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(void) fwrite("\365\0", 1, 2, p);
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puthl2(h, p);
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puthl2(w, p);
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puthl3(buflen, p);
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while(buflen) {
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int len;
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len = min(buflen, MAX_VECTOR_LEN);
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PMP(p, len);
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(void) fwrite((char *) buf, 1, len, p);
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buf += len;
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buflen -= len;
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}
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(void) fflush(p);
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}
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