pdf_g4.c

Mon, 14 Dec 2009 16:18:21 +0000

author
Philip Pemberton <philpem@philpem.me.uk>
date
Mon, 14 Dec 2009 16:18:21 +0000
changeset 172
2fae6df568f6
parent 145
3ed3f7f32837
permissions
-rw-r--r--

remove erroneous 0.33-philpem1 tag

eric@62 1 /*
eric@125 2 * tumble: build a PDF file from image files
eric@62 3 *
eric@62 4 * PDF routines
eric@145 5 * $Id: pdf_g4.c,v 1.16 2003/03/19 23:44:53 eric Exp $
eric@78 6 * Copyright 2003 Eric Smith <eric@brouhaha.com>
eric@62 7 *
eric@62 8 * This program is free software; you can redistribute it and/or modify
eric@62 9 * it under the terms of the GNU General Public License version 2 as
eric@62 10 * published by the Free Software Foundation. Note that permission is
eric@62 11 * not granted to redistribute this program under the terms of any
eric@62 12 * other version of the General Public License.
eric@62 13 *
eric@62 14 * This program is distributed in the hope that it will be useful,
eric@62 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
eric@62 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
eric@62 17 * GNU General Public License for more details.
eric@62 18 *
eric@62 19 * You should have received a copy of the GNU General Public License
eric@62 20 * along with this program; if not, write to the Free Software
eric@62 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111 USA
eric@62 22 */
eric@62 23
eric@62 24
eric@62 25 #include <stdbool.h>
eric@62 26 #include <stdint.h>
eric@59 27 #include <stdio.h>
eric@67 28 #include <stdlib.h>
eric@59 29 #include <string.h>
eric@59 30
eric@59 31
eric@62 32 #include "bitblt.h"
eric@60 33 #include "pdf.h"
eric@60 34 #include "pdf_util.h"
eric@60 35 #include "pdf_prim.h"
eric@60 36 #include "pdf_private.h"
eric@59 37
eric@59 38
eric@59 39 struct pdf_g4_image
eric@59 40 {
eric@64 41 double width, height;
eric@64 42 double x, y;
eric@66 43 double r, g, b; /* fill color, only for ImageMask */
eric@59 44 unsigned long Columns;
eric@59 45 unsigned long Rows;
eric@66 46 bool ImageMask;
eric@66 47 bool BlackIs1;
eric@62 48 Bitmap *bitmap;
eric@59 49 char XObject_name [4];
eric@59 50 };
eric@59 51
eric@59 52
eric@102 53 static void pdf_write_g4_content_callback (pdf_file_handle pdf_file,
eric@102 54 struct pdf_obj *stream,
eric@102 55 void *app_data)
eric@59 56 {
eric@59 57 struct pdf_g4_image *image = app_data;
eric@59 58
eric@66 59 /* transformation matrix is: width 0 0 height x y cm */
eric@66 60 pdf_stream_printf (pdf_file, stream, "q %g 0 0 %g %g %g cm ",
eric@66 61 image->width, image->height,
eric@66 62 image->x, image->y);
eric@66 63 if (image->ImageMask)
eric@66 64 pdf_stream_printf (pdf_file, stream, "%g %g %g rg ",
eric@66 65 image->r, image->g, image->b);
eric@59 66
eric@66 67 pdf_stream_printf (pdf_file, stream, "/%s Do Q\r\n",
eric@66 68 image->XObject_name);
eric@59 69 }
eric@59 70
eric@59 71
eric@102 72 static void pdf_write_g4_fax_image_callback (pdf_file_handle pdf_file,
eric@102 73 struct pdf_obj *stream,
eric@102 74 void *app_data)
eric@59 75 {
eric@59 76 struct pdf_g4_image *image = app_data;
eric@59 77
eric@91 78 bitblt_write_g4 (image->bitmap, pdf_file->f);
eric@59 79 }
eric@59 80
eric@59 81
eric@59 82 void pdf_write_g4_fax_image (pdf_page_handle pdf_page,
eric@64 83 double x,
eric@64 84 double y,
eric@64 85 double width,
eric@64 86 double height,
eric@62 87 Bitmap *bitmap,
eric@66 88 bool ImageMask,
eric@66 89 double r, /* RGB fill color, only for ImageMask */
eric@66 90 double g,
eric@66 91 double b,
eric@66 92 bool BlackIs1) /* boolean, typ. false */
eric@59 93 {
eric@59 94 struct pdf_g4_image *image;
eric@59 95
eric@59 96 struct pdf_obj *stream;
eric@59 97 struct pdf_obj *stream_dict;
eric@59 98 struct pdf_obj *decode_parms;
eric@59 99
eric@59 100 struct pdf_obj *content_stream;
eric@59 101
eric@118 102 pdf_add_array_elem_unique (pdf_page->procset, pdf_new_name ("ImageB"));
eric@118 103
eric@67 104 image = pdf_calloc (1, sizeof (struct pdf_g4_image));
eric@59 105
eric@64 106 image->width = width;
eric@64 107 image->height = height;
eric@64 108 image->x = x;
eric@64 109 image->y = y;
eric@66 110 image->r = r;
eric@66 111 image->g = g;
eric@66 112 image->b = b;
eric@64 113
eric@62 114 image->bitmap = bitmap;
eric@62 115 image->Columns = bitmap->rect.max.x - bitmap->rect.min.x;
eric@62 116 image->Rows = bitmap->rect.max.y - bitmap->rect.min.y;
eric@66 117 image->ImageMask = ImageMask;
eric@59 118 image->BlackIs1 = BlackIs1;
eric@59 119
eric@59 120 stream_dict = pdf_new_obj (PT_DICTIONARY);
eric@59 121
eric@59 122 stream = pdf_new_ind_ref (pdf_page->pdf_file,
eric@59 123 pdf_new_stream (pdf_page->pdf_file,
eric@59 124 stream_dict,
eric@59 125 & pdf_write_g4_fax_image_callback,
eric@59 126 image));
eric@59 127
eric@59 128 strcpy (& image->XObject_name [0], "Im ");
eric@59 129 image->XObject_name [2] = pdf_new_XObject (pdf_page, stream);
eric@59 130
eric@59 131 pdf_set_dict_entry (stream_dict, "Type", pdf_new_name ("XObject"));
eric@59 132 pdf_set_dict_entry (stream_dict, "Subtype", pdf_new_name ("Image"));
eric@59 133 pdf_set_dict_entry (stream_dict, "Name", pdf_new_name (& image->XObject_name [0]));
eric@62 134 pdf_set_dict_entry (stream_dict, "Width", pdf_new_integer (image->Columns));
eric@62 135 pdf_set_dict_entry (stream_dict, "Height", pdf_new_integer (image->Rows));
eric@59 136 pdf_set_dict_entry (stream_dict, "BitsPerComponent", pdf_new_integer (1));
eric@59 137 if (ImageMask)
eric@59 138 pdf_set_dict_entry (stream_dict, "ImageMask", pdf_new_bool (ImageMask));
eric@59 139 else
eric@59 140 pdf_set_dict_entry (stream_dict, "ColorSpace", pdf_new_name ("DeviceGray"));
eric@59 141
eric@59 142 decode_parms = pdf_new_obj (PT_DICTIONARY);
eric@59 143
eric@59 144 pdf_set_dict_entry (decode_parms,
eric@59 145 "K",
eric@59 146 pdf_new_integer (-1));
eric@59 147
eric@59 148 pdf_set_dict_entry (decode_parms,
eric@59 149 "Columns",
eric@62 150 pdf_new_integer (image->Columns));
eric@59 151
eric@59 152 pdf_set_dict_entry (decode_parms,
eric@59 153 "Rows",
eric@62 154 pdf_new_integer (image->Rows));
eric@59 155
eric@59 156 if (BlackIs1)
eric@59 157 pdf_set_dict_entry (decode_parms,
eric@59 158 "BlackIs1",
eric@59 159 pdf_new_bool (BlackIs1));
eric@59 160
eric@59 161 pdf_stream_add_filter (stream, "CCITTFaxDecode", decode_parms);
eric@59 162
eric@59 163 /* the following will write the stream, using our callback function to
eric@59 164 get the actual data */
eric@59 165 pdf_write_ind_obj (pdf_page->pdf_file, stream);
eric@59 166
eric@59 167 content_stream = pdf_new_ind_ref (pdf_page->pdf_file,
eric@59 168 pdf_new_stream (pdf_page->pdf_file,
eric@59 169 pdf_new_obj (PT_DICTIONARY),
eric@59 170 & pdf_write_g4_content_callback,
eric@59 171 image));
eric@59 172
eric@59 173 pdf_set_dict_entry (pdf_page->page_dict, "Contents", content_stream);
eric@59 174
eric@59 175 pdf_write_ind_obj (pdf_page->pdf_file, content_stream);
eric@59 176 }
eric@59 177