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-rw-r--r--plug-ins/file-faxg3/faxg3.c588
1 files changed, 588 insertions, 0 deletions
diff --git a/plug-ins/file-faxg3/faxg3.c b/plug-ins/file-faxg3/faxg3.c
new file mode 100644
index 0000000..17a45e9
--- /dev/null
+++ b/plug-ins/file-faxg3/faxg3.c
@@ -0,0 +1,588 @@
+/* This is a plugin for GIMP.
+ *
+ * Copyright (C) 1997 Jochen Friedrich
+ * Parts Copyright (C) 1995 Gert Doering
+ * Parts Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <errno.h>
+#include <string.h>
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include <sys/types.h>
+#include <fcntl.h>
+
+#include <glib.h> /* For G_OS_WIN32 */
+#include <glib/gstdio.h>
+
+#ifdef G_OS_WIN32
+#include <io.h>
+#endif
+
+#ifndef _O_BINARY
+#define _O_BINARY 0
+#endif
+
+#include <libgimp/gimp.h>
+
+#include "g3.h"
+
+#include "libgimp/stdplugins-intl.h"
+
+
+#define LOAD_PROC "file-faxg3-load"
+#define VERSION "0.6"
+
+/* Declare local functions.
+ */
+
+static void query (void);
+static void run (const gchar *name,
+ gint nparams,
+ const GimpParam *param,
+ gint *nreturn_vals,
+ GimpParam **return_vals);
+
+static gint32 load_image (const gchar *filename,
+ GError **error);
+
+static gint32 emitgimp (gint hcol,
+ gint row,
+ const gchar *bitmap,
+ gint bperrow,
+ const gchar *filename);
+
+
+const GimpPlugInInfo PLUG_IN_INFO =
+{
+ NULL, /* init_proc */
+ NULL, /* quit_proc */
+ query, /* query_proc */
+ run, /* run_proc */
+};
+
+MAIN ()
+
+void
+query (void)
+{
+ static const GimpParamDef load_args[] =
+ {
+ { GIMP_PDB_INT32, "run-mode", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" },
+ { GIMP_PDB_STRING, "filename", "The name of the file to load" },
+ { GIMP_PDB_STRING, "raw-filename", "The name of the file to load" },
+ };
+ static const GimpParamDef load_return_vals[] =
+ {
+ { GIMP_PDB_IMAGE, "image", "Output image" },
+ };
+
+ gimp_install_procedure (LOAD_PROC,
+ "loads g3 fax files",
+ "This plug-in loads Fax G3 Image files.",
+ "Jochen Friedrich",
+ "Jochen Friedrich, Gert Doering, Spencer Kimball & Peter Mattis",
+ VERSION,
+ N_("G3 fax image"),
+ NULL,
+ GIMP_PLUGIN,
+ G_N_ELEMENTS (load_args),
+ G_N_ELEMENTS (load_return_vals),
+ load_args, load_return_vals);
+
+ gimp_register_file_handler_mime (LOAD_PROC, "image/g3-fax");
+ gimp_register_magic_load_handler (LOAD_PROC,
+ "g3",
+ "",
+ "4,string,Research");
+}
+
+static void
+run (const gchar *name,
+ gint nparams,
+ const GimpParam *param,
+ gint *nreturn_vals,
+ GimpParam **return_vals)
+{
+ static GimpParam values[2];
+ gint32 image_ID;
+ GError *error = NULL;
+
+ INIT_I18N ();
+ gegl_init (NULL, NULL);
+
+ *nreturn_vals = 1;
+ *return_vals = values;
+
+ values[0].type = GIMP_PDB_STATUS;
+ values[0].data.d_status = GIMP_PDB_CALLING_ERROR;
+
+ if (strcmp (name, LOAD_PROC) == 0)
+ {
+ image_ID = load_image (param[1].data.d_string, &error);
+
+ if (image_ID != -1)
+ {
+ *nreturn_vals = 2;
+
+ values[0].data.d_status = GIMP_PDB_SUCCESS;
+ values[1].type = GIMP_PDB_IMAGE;
+ values[1].data.d_image = image_ID;
+ }
+ else
+ {
+ values[0].data.d_status = GIMP_PDB_EXECUTION_ERROR;
+
+ if (error)
+ {
+ *nreturn_vals = 2;
+
+ values[1].type = GIMP_PDB_STRING;
+ values[1].data.d_string = error->message;
+ }
+ }
+ }
+}
+
+#ifdef DEBUG
+void
+putbin (unsigned long d)
+{
+ unsigned long i = 0x80000000;
+
+ while (i != 0)
+ {
+ putc((d & i) ? '1' : '0', stderr);
+ i >>= 1;
+ }
+ putc('\n', stderr);
+}
+#endif
+
+static int byte_tab[256];
+/* static int o_stretch; */ /* -stretch: double each line */
+/* static int o_stretch_force=-1; */ /* -1: guess from filename */
+/* static int o_lj; */ /* -l: LJ output */
+/* static int o_turn; */ /* -t: turn 90 degrees right */
+
+struct g3_tree * black, * white;
+
+#define CHUNK 2048;
+static char rbuf[2048]; /* read buffer */
+static int rp; /* read pointer */
+static int rs; /* read buffer size */
+
+#define MAX_ROWS 4300
+#define MAX_COLS 1728 /* !! FIXME - command line parameter */
+
+
+static gint32
+load_image (const gchar *filename,
+ GError **error)
+{
+ int data;
+ int hibit;
+ struct g3_tree *p;
+ int nr_pels;
+ int fd;
+ int color;
+ int i, rr, rsize;
+ int cons_eol;
+
+ gint32 image_id;
+ gint bperrow = MAX_COLS/8; /* bytes per bit row */
+ gchar *bitmap; /* MAX_ROWS by (bperrow) bytes */
+ gchar *bp; /* bitmap pointer */
+ gint row;
+ gint max_rows; /* max. rows allocated */
+ gint col, hcol; /* column, highest column ever used */
+
+ gimp_progress_init_printf (_("Opening '%s'"),
+ gimp_filename_to_utf8 (filename));
+
+ /* initialize lookup trees */
+ build_tree (&white, t_white);
+ build_tree (&white, m_white);
+ build_tree (&black, t_black);
+ build_tree (&black, m_black);
+
+ init_byte_tab (0, byte_tab);
+
+ fd = g_open (filename, O_RDONLY | _O_BINARY, 0);
+
+ if (fd < 0)
+ {
+ g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno),
+ _("Could not open '%s' for reading: %s"),
+ gimp_filename_to_utf8 (filename), g_strerror (errno));
+ return -1;
+ }
+
+ hibit = 0;
+ data = 0;
+
+ cons_eol = 0; /* consecutive EOLs read - zero yet */
+
+ color = 0; /* start with white */
+ rr = 0;
+
+ rsize = lseek (fd, 0L, SEEK_END);
+ lseek (fd, 0L, 0);
+
+ rs = read (fd, rbuf, sizeof (rbuf));
+ if (rs < 0)
+ {
+ perror ("read");
+ close (fd);
+ gimp_quit ();
+ }
+
+ rr += rs;
+ gimp_progress_update ((float) rr / rsize / 2.0);
+
+ /* skip GhostScript header */
+ rp = (rs >= 64 && strcmp (rbuf + 1, "PC Research, Inc") == 0) ? 64 : 0;
+
+ /* initialize bitmap */
+
+ row = col = hcol = 0;
+
+ bitmap = g_new0 (gchar, (max_rows = MAX_ROWS) * MAX_COLS / 8);
+
+ bp = &bitmap[row * MAX_COLS / 8];
+
+ while (rs > 0 && cons_eol < 4) /* i.e., while (!EOF) */
+ {
+#ifdef DEBUG
+ g_printerr ("hibit=%2d, data=", hibit);
+ putbin (data);
+#endif
+
+ while (hibit < 20)
+ {
+ data |= (byte_tab[(int) (unsigned char) rbuf[rp++]] << hibit);
+ hibit += 8;
+
+ if (rp >= rs)
+ {
+ rs = read (fd, rbuf, sizeof (rbuf));
+ if (rs < 0)
+ { perror ("read2");
+ break;
+ }
+ rr += rs;
+ gimp_progress_update ((float) rr / rsize / 2.0);
+ rp = 0;
+ if (rs == 0)
+ goto do_write;
+ }
+
+#ifdef DEBUG
+ g_printerr ("hibit=%2d, data=", hibit);
+ putbin (data);
+#endif
+ }
+
+ if (color == 0) /* white */
+ p = white->nextb[data & BITM];
+ else /* black */
+ p = black->nextb[data & BITM];
+
+ while (p != NULL && ! (p->nr_bits))
+ {
+ data >>= FBITS;
+ hibit -= FBITS;
+ p = p->nextb[data & BITM];
+ }
+
+ if (p == NULL) /* invalid code */
+ {
+ g_printerr ("invalid code, row=%d, col=%d, file offset=%lx, skip to eol\n",
+ row, col, (unsigned long) lseek (fd, 0, 1) - rs + rp);
+
+ while ((data & 0x03f) != 0)
+ {
+ data >>= 1; hibit--;
+
+ if ( hibit < 20 )
+ {
+ data |= (byte_tab[(int) (unsigned char) rbuf[rp++]] << hibit);
+ hibit += 8;
+
+ if (rp >= rs) /* buffer underrun */
+ {
+ rs = read (fd, rbuf, sizeof (rbuf));
+
+ if (rs < 0)
+ { perror ("read4");
+ break;
+ }
+
+ rr += rs;
+ gimp_progress_update ((float) rr / rsize / 2.0);
+ rp = 0;
+ if (rs == 0)
+ goto do_write;
+ }
+ }
+ }
+ nr_pels = -1; /* handle as if eol */
+ }
+ else /* p != NULL <-> valid code */
+ {
+ data >>= p->nr_bits;
+ hibit -= p->nr_bits;
+
+ nr_pels = ((struct g3_leaf *) p)->nr_pels;
+#ifdef DEBUG
+ g_printerr ("PELs: %d (%c)\n", nr_pels, '0' + color);
+#endif
+ }
+
+ /* handle EOL (including fill bits) */
+ if (nr_pels == -1)
+ {
+#ifdef DEBUG
+ g_printerr ("hibit=%2d, data=", hibit);
+ putbin (data);
+#endif
+ /* skip filler 0bits -> seek for "1"-bit */
+ while ((data & 0x01) != 1)
+ {
+ if ((data & 0xf) == 0) /* nibble optimization */
+ {
+ hibit-= 4;
+ data >>= 4;
+ }
+ else
+ {
+ hibit--;
+ data >>= 1;
+ }
+
+ /* fill higher bits */
+ if (hibit < 20)
+ {
+ data |= ( byte_tab[(int) (unsigned char) rbuf[ rp++]] << hibit);
+ hibit += 8;
+
+ if (rp >= rs) /* buffer underrun */
+ {
+ rs = read (fd, rbuf, sizeof (rbuf));
+ if ( rs < 0 )
+ {
+ perror ("read3");
+ break;
+ }
+ rr += rs;
+ gimp_progress_update ((float) rr / rsize / 2.0);
+ rp = 0;
+ if (rs == 0)
+ goto do_write;
+ }
+ }
+#ifdef DEBUG
+ g_printerr ("hibit=%2d, data=", hibit );
+ putbin(data);
+#endif
+ } /* end skip 0bits */
+ hibit--;
+ data >>=1;
+
+ color = 0;
+
+ if (col == 0)
+ {
+ cons_eol++; /* consecutive EOLs */
+ }
+ else
+ {
+ if (col > hcol && col <= MAX_COLS)
+ hcol = col;
+ row++;
+
+ /* bitmap memory full? make it larger! */
+ if (row >= max_rows)
+ {
+ gchar *p = g_try_realloc (bitmap,
+ (max_rows += 500) * MAX_COLS / 8);
+ if (p == NULL)
+ {
+ perror ("realloc() failed, page truncated");
+ rs = 0;
+ }
+ else
+ {
+ bitmap = p;
+ memset (&bitmap[ row * MAX_COLS / 8 ], 0,
+ (max_rows - row) * MAX_COLS / 8);
+ }
+ }
+
+ col=0; bp = &bitmap[row * MAX_COLS / 8];
+ cons_eol = 0;
+ }
+ }
+ else /* not eol */
+ {
+ if (col + nr_pels > MAX_COLS)
+ nr_pels = MAX_COLS - col;
+
+ if (color == 0) /* white */
+ {
+ col += nr_pels;
+ }
+ else /* black */
+ {
+ register int bit = (0x80 >> (col & 07));
+ register char *w = & bp[col >> 3];
+
+ for (i = nr_pels; i > 0; i--)
+ {
+ *w |= bit;
+ bit >>=1;
+ if (bit == 0)
+ {
+ bit = 0x80;
+ w++;
+ }
+ col++;
+ }
+ }
+
+ if (nr_pels < 64)
+ color = !color; /* terminating code */
+ }
+ } /* end main loop */
+
+ do_write: /* write pbm (or whatever) file */
+
+ if (fd != 0)
+ close (fd); /* close input file */
+
+#ifdef DEBUG
+ g_printerr ("consecutive EOLs: %d, max columns: %d\n", cons_eol, hcol);
+#endif
+
+ image_id = emitgimp (hcol, row, bitmap, bperrow, filename);
+
+ g_free (bitmap);
+
+ return image_id;
+}
+
+/* hcol is the number of columns, row the number of rows
+ * bperrow is the number of bytes actually used by hcol, which may
+ * be greater than (hcol+7)/8 [in case of an unscaled g3 image less
+ * than 1728 pixels wide]
+ */
+
+static gint32
+emitgimp (gint hcol,
+ gint row,
+ const gchar *bitmap,
+ gint bperrow,
+ const gchar *filename)
+{
+ GeglBuffer *buffer;
+ gint32 image_ID;
+ gint32 layer_ID;
+ guchar *buf;
+ guchar tmp;
+ gint x, y;
+ gint xx, yy;
+ gint tile_height;
+
+ /* initialize */
+
+ tmp = 0;
+
+#ifdef DEBUG
+ g_printerr ("emit gimp: %d x %d\n", hcol, row);
+#endif
+
+ image_ID = gimp_image_new (hcol, row, GIMP_GRAY);
+ gimp_image_set_filename (image_ID, filename);
+
+ layer_ID = gimp_layer_new (image_ID, _("Background"),
+ hcol,
+ row,
+ GIMP_GRAY_IMAGE,
+ 100,
+ gimp_image_get_default_new_layer_mode (image_ID));
+ gimp_image_insert_layer (image_ID, layer_ID, -1, 0);
+
+ buffer = gimp_drawable_get_buffer (layer_ID);
+
+ tile_height = gimp_tile_height ();
+#ifdef DEBUG
+ g_printerr ("tile height: %d\n", tile_height);
+#endif
+
+ buf = g_new (guchar, hcol * tile_height);
+
+ xx = 0;
+ yy = 0;
+
+ for (y = 0; y < row; y++)
+ {
+ for (x = 0; x < hcol; x++)
+ {
+ if ((x & 7) == 0)
+ tmp = bitmap[y * bperrow + (x >> 3)];
+
+ buf[xx++] = tmp&(128 >> (x & 7)) ? 0 : 255;
+ }
+
+ if ((y - yy) == tile_height - 1)
+ {
+#ifdef DEBUG
+ g_printerr ("update tile height: %d\n", tile_height);
+#endif
+
+ gegl_buffer_set (buffer, GEGL_RECTANGLE (0, yy, hcol, tile_height), 0,
+ NULL, buf, GEGL_AUTO_ROWSTRIDE);
+
+ gimp_progress_update (0.5 + (float) y / row / 2.0);
+
+ xx = 0;
+ yy += tile_height;
+ }
+ }
+
+ if (row - yy)
+ {
+#ifdef DEBUG
+ g_printerr ("update rest: %d\n", row-yy);
+#endif
+
+ gegl_buffer_set (buffer, GEGL_RECTANGLE (0, yy, hcol, row - yy), 0,
+ NULL, buf, GEGL_AUTO_ROWSTRIDE);
+ }
+
+ gimp_progress_update (1.0);
+
+ g_free (buf);
+
+ g_object_unref (buffer);
+
+ return image_ID;
+}
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