pdf_g4.c

Thu, 13 Mar 2003 07:59:10 +0000

author
eric
date
Thu, 13 Mar 2003 07:59:10 +0000
changeset 121
e50c7f76f2f6
parent 118
c22e1c0a64fd
child 122
cdde8bcc17fe
permissions
-rw-r--r--

don't use page mode USE_OUTLINES if there are no outline entries.

eric@62 1 /*
eric@62 2 * t2p: Create a PDF file from the contents of one or more TIFF
eric@62 3 * bilevel image files. The images in the resulting PDF file
eric@62 4 * will be compressed using ITU-T T.6 (G4) fax encoding.
eric@62 5 *
eric@62 6 * PDF routines
eric@118 7 * $Id: pdf_g4.c,v 1.13 2003/03/12 22:56:57 eric Exp $
eric@78 8 * Copyright 2003 Eric Smith <eric@brouhaha.com>
eric@62 9 *
eric@62 10 * This program is free software; you can redistribute it and/or modify
eric@62 11 * it under the terms of the GNU General Public License version 2 as
eric@62 12 * published by the Free Software Foundation. Note that permission is
eric@62 13 * not granted to redistribute this program under the terms of any
eric@62 14 * other version of the General Public License.
eric@62 15 *
eric@62 16 * This program is distributed in the hope that it will be useful,
eric@62 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
eric@62 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
eric@62 19 * GNU General Public License for more details.
eric@62 20 *
eric@62 21 * You should have received a copy of the GNU General Public License
eric@62 22 * along with this program; if not, write to the Free Software
eric@62 23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111 USA
eric@62 24 */
eric@62 25
eric@62 26
eric@62 27 #include <stdbool.h>
eric@62 28 #include <stdint.h>
eric@59 29 #include <stdio.h>
eric@67 30 #include <stdlib.h>
eric@59 31 #include <string.h>
eric@59 32
eric@59 33
eric@62 34 #include "bitblt.h"
eric@60 35 #include "pdf.h"
eric@60 36 #include "pdf_util.h"
eric@60 37 #include "pdf_prim.h"
eric@60 38 #include "pdf_private.h"
eric@59 39
eric@59 40
eric@59 41 struct pdf_g4_image
eric@59 42 {
eric@64 43 double width, height;
eric@64 44 double x, y;
eric@66 45 double r, g, b; /* fill color, only for ImageMask */
eric@59 46 unsigned long Columns;
eric@59 47 unsigned long Rows;
eric@66 48 bool ImageMask;
eric@66 49 bool BlackIs1;
eric@62 50 Bitmap *bitmap;
eric@59 51 char XObject_name [4];
eric@59 52 };
eric@59 53
eric@59 54
eric@102 55 static void pdf_write_g4_content_callback (pdf_file_handle pdf_file,
eric@102 56 struct pdf_obj *stream,
eric@102 57 void *app_data)
eric@59 58 {
eric@59 59 struct pdf_g4_image *image = app_data;
eric@59 60
eric@66 61 /* transformation matrix is: width 0 0 height x y cm */
eric@66 62 pdf_stream_printf (pdf_file, stream, "q %g 0 0 %g %g %g cm ",
eric@66 63 image->width, image->height,
eric@66 64 image->x, image->y);
eric@66 65 if (image->ImageMask)
eric@66 66 pdf_stream_printf (pdf_file, stream, "%g %g %g rg ",
eric@66 67 image->r, image->g, image->b);
eric@59 68
eric@66 69 pdf_stream_printf (pdf_file, stream, "/%s Do Q\r\n",
eric@66 70 image->XObject_name);
eric@59 71 }
eric@59 72
eric@59 73
eric@102 74 static void pdf_write_g4_fax_image_callback (pdf_file_handle pdf_file,
eric@102 75 struct pdf_obj *stream,
eric@102 76 void *app_data)
eric@59 77 {
eric@59 78 struct pdf_g4_image *image = app_data;
eric@59 79
eric@91 80 bitblt_write_g4 (image->bitmap, pdf_file->f);
eric@59 81 }
eric@59 82
eric@59 83
eric@59 84 void pdf_write_g4_fax_image (pdf_page_handle pdf_page,
eric@64 85 double x,
eric@64 86 double y,
eric@64 87 double width,
eric@64 88 double height,
eric@62 89 Bitmap *bitmap,
eric@66 90 bool ImageMask,
eric@66 91 double r, /* RGB fill color, only for ImageMask */
eric@66 92 double g,
eric@66 93 double b,
eric@66 94 bool BlackIs1) /* boolean, typ. false */
eric@59 95 {
eric@59 96 struct pdf_g4_image *image;
eric@59 97
eric@59 98 struct pdf_obj *stream;
eric@59 99 struct pdf_obj *stream_dict;
eric@59 100 struct pdf_obj *decode_parms;
eric@59 101
eric@59 102 struct pdf_obj *content_stream;
eric@59 103
eric@118 104 pdf_add_array_elem_unique (pdf_page->procset, pdf_new_name ("ImageB"));
eric@118 105
eric@67 106 image = pdf_calloc (1, sizeof (struct pdf_g4_image));
eric@59 107
eric@64 108 image->width = width;
eric@64 109 image->height = height;
eric@64 110 image->x = x;
eric@64 111 image->y = y;
eric@66 112 image->r = r;
eric@66 113 image->g = g;
eric@66 114 image->b = b;
eric@64 115
eric@62 116 image->bitmap = bitmap;
eric@62 117 image->Columns = bitmap->rect.max.x - bitmap->rect.min.x;
eric@62 118 image->Rows = bitmap->rect.max.y - bitmap->rect.min.y;
eric@66 119 image->ImageMask = ImageMask;
eric@59 120 image->BlackIs1 = BlackIs1;
eric@59 121
eric@59 122 stream_dict = pdf_new_obj (PT_DICTIONARY);
eric@59 123
eric@59 124 stream = pdf_new_ind_ref (pdf_page->pdf_file,
eric@59 125 pdf_new_stream (pdf_page->pdf_file,
eric@59 126 stream_dict,
eric@59 127 & pdf_write_g4_fax_image_callback,
eric@59 128 image));
eric@59 129
eric@59 130 strcpy (& image->XObject_name [0], "Im ");
eric@59 131 image->XObject_name [2] = pdf_new_XObject (pdf_page, stream);
eric@59 132
eric@59 133 pdf_set_dict_entry (stream_dict, "Type", pdf_new_name ("XObject"));
eric@59 134 pdf_set_dict_entry (stream_dict, "Subtype", pdf_new_name ("Image"));
eric@59 135 pdf_set_dict_entry (stream_dict, "Name", pdf_new_name (& image->XObject_name [0]));
eric@62 136 pdf_set_dict_entry (stream_dict, "Width", pdf_new_integer (image->Columns));
eric@62 137 pdf_set_dict_entry (stream_dict, "Height", pdf_new_integer (image->Rows));
eric@59 138 pdf_set_dict_entry (stream_dict, "BitsPerComponent", pdf_new_integer (1));
eric@59 139 if (ImageMask)
eric@59 140 pdf_set_dict_entry (stream_dict, "ImageMask", pdf_new_bool (ImageMask));
eric@59 141 else
eric@59 142 pdf_set_dict_entry (stream_dict, "ColorSpace", pdf_new_name ("DeviceGray"));
eric@59 143
eric@59 144 decode_parms = pdf_new_obj (PT_DICTIONARY);
eric@59 145
eric@59 146 pdf_set_dict_entry (decode_parms,
eric@59 147 "K",
eric@59 148 pdf_new_integer (-1));
eric@59 149
eric@59 150 pdf_set_dict_entry (decode_parms,
eric@59 151 "Columns",
eric@62 152 pdf_new_integer (image->Columns));
eric@59 153
eric@59 154 pdf_set_dict_entry (decode_parms,
eric@59 155 "Rows",
eric@62 156 pdf_new_integer (image->Rows));
eric@59 157
eric@59 158 if (BlackIs1)
eric@59 159 pdf_set_dict_entry (decode_parms,
eric@59 160 "BlackIs1",
eric@59 161 pdf_new_bool (BlackIs1));
eric@59 162
eric@59 163 pdf_stream_add_filter (stream, "CCITTFaxDecode", decode_parms);
eric@59 164
eric@59 165 /* the following will write the stream, using our callback function to
eric@59 166 get the actual data */
eric@59 167 pdf_write_ind_obj (pdf_page->pdf_file, stream);
eric@59 168
eric@59 169 content_stream = pdf_new_ind_ref (pdf_page->pdf_file,
eric@59 170 pdf_new_stream (pdf_page->pdf_file,
eric@59 171 pdf_new_obj (PT_DICTIONARY),
eric@59 172 & pdf_write_g4_content_callback,
eric@59 173 image));
eric@59 174
eric@59 175 pdf_set_dict_entry (pdf_page->page_dict, "Contents", content_stream);
eric@59 176
eric@59 177 pdf_write_ind_obj (pdf_page->pdf_file, content_stream);
eric@59 178 }
eric@59 179