Mon, 14 Dec 2009 16:18:21 +0000
remove erroneous 0.33-philpem1 tag
1 /*
2 * tumble: build a PDF file from image files
3 *
4 * PDF routines
5 * $Id: pdf_g4.c,v 1.16 2003/03/19 23:44:53 eric Exp $
6 * Copyright 2003 Eric Smith <eric@brouhaha.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation. Note that permission is
11 * not granted to redistribute this program under the terms of any
12 * other version of the General Public License.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111 USA
22 */
25 #include <stdbool.h>
26 #include <stdint.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
32 #include "bitblt.h"
33 #include "pdf.h"
34 #include "pdf_util.h"
35 #include "pdf_prim.h"
36 #include "pdf_private.h"
39 struct pdf_g4_image
40 {
41 double width, height;
42 double x, y;
43 double r, g, b; /* fill color, only for ImageMask */
44 unsigned long Columns;
45 unsigned long Rows;
46 bool ImageMask;
47 bool BlackIs1;
48 Bitmap *bitmap;
49 char XObject_name [4];
50 };
53 static void pdf_write_g4_content_callback (pdf_file_handle pdf_file,
54 struct pdf_obj *stream,
55 void *app_data)
56 {
57 struct pdf_g4_image *image = app_data;
59 /* transformation matrix is: width 0 0 height x y cm */
60 pdf_stream_printf (pdf_file, stream, "q %g 0 0 %g %g %g cm ",
61 image->width, image->height,
62 image->x, image->y);
63 if (image->ImageMask)
64 pdf_stream_printf (pdf_file, stream, "%g %g %g rg ",
65 image->r, image->g, image->b);
67 pdf_stream_printf (pdf_file, stream, "/%s Do Q\r\n",
68 image->XObject_name);
69 }
72 static void pdf_write_g4_fax_image_callback (pdf_file_handle pdf_file,
73 struct pdf_obj *stream,
74 void *app_data)
75 {
76 struct pdf_g4_image *image = app_data;
78 bitblt_write_g4 (image->bitmap, pdf_file->f);
79 }
82 void pdf_write_g4_fax_image (pdf_page_handle pdf_page,
83 double x,
84 double y,
85 double width,
86 double height,
87 Bitmap *bitmap,
88 bool ImageMask,
89 double r, /* RGB fill color, only for ImageMask */
90 double g,
91 double b,
92 bool BlackIs1) /* boolean, typ. false */
93 {
94 struct pdf_g4_image *image;
96 struct pdf_obj *stream;
97 struct pdf_obj *stream_dict;
98 struct pdf_obj *decode_parms;
100 struct pdf_obj *content_stream;
102 pdf_add_array_elem_unique (pdf_page->procset, pdf_new_name ("ImageB"));
104 image = pdf_calloc (1, sizeof (struct pdf_g4_image));
106 image->width = width;
107 image->height = height;
108 image->x = x;
109 image->y = y;
110 image->r = r;
111 image->g = g;
112 image->b = b;
114 image->bitmap = bitmap;
115 image->Columns = bitmap->rect.max.x - bitmap->rect.min.x;
116 image->Rows = bitmap->rect.max.y - bitmap->rect.min.y;
117 image->ImageMask = ImageMask;
118 image->BlackIs1 = BlackIs1;
120 stream_dict = pdf_new_obj (PT_DICTIONARY);
122 stream = pdf_new_ind_ref (pdf_page->pdf_file,
123 pdf_new_stream (pdf_page->pdf_file,
124 stream_dict,
125 & pdf_write_g4_fax_image_callback,
126 image));
128 strcpy (& image->XObject_name [0], "Im ");
129 image->XObject_name [2] = pdf_new_XObject (pdf_page, stream);
131 pdf_set_dict_entry (stream_dict, "Type", pdf_new_name ("XObject"));
132 pdf_set_dict_entry (stream_dict, "Subtype", pdf_new_name ("Image"));
133 pdf_set_dict_entry (stream_dict, "Name", pdf_new_name (& image->XObject_name [0]));
134 pdf_set_dict_entry (stream_dict, "Width", pdf_new_integer (image->Columns));
135 pdf_set_dict_entry (stream_dict, "Height", pdf_new_integer (image->Rows));
136 pdf_set_dict_entry (stream_dict, "BitsPerComponent", pdf_new_integer (1));
137 if (ImageMask)
138 pdf_set_dict_entry (stream_dict, "ImageMask", pdf_new_bool (ImageMask));
139 else
140 pdf_set_dict_entry (stream_dict, "ColorSpace", pdf_new_name ("DeviceGray"));
142 decode_parms = pdf_new_obj (PT_DICTIONARY);
144 pdf_set_dict_entry (decode_parms,
145 "K",
146 pdf_new_integer (-1));
148 pdf_set_dict_entry (decode_parms,
149 "Columns",
150 pdf_new_integer (image->Columns));
152 pdf_set_dict_entry (decode_parms,
153 "Rows",
154 pdf_new_integer (image->Rows));
156 if (BlackIs1)
157 pdf_set_dict_entry (decode_parms,
158 "BlackIs1",
159 pdf_new_bool (BlackIs1));
161 pdf_stream_add_filter (stream, "CCITTFaxDecode", decode_parms);
163 /* the following will write the stream, using our callback function to
164 get the actual data */
165 pdf_write_ind_obj (pdf_page->pdf_file, stream);
167 content_stream = pdf_new_ind_ref (pdf_page->pdf_file,
168 pdf_new_stream (pdf_page->pdf_file,
169 pdf_new_obj (PT_DICTIONARY),
170 & pdf_write_g4_content_callback,
171 image));
173 pdf_set_dict_entry (pdf_page->page_dict, "Contents", content_stream);
175 pdf_write_ind_obj (pdf_page->pdf_file, content_stream);
176 }