bitblt_g4.c

Thu, 20 Feb 2003 12:16:00 +0000

author
eric
date
Thu, 20 Feb 2003 12:16:00 +0000
changeset 59
e8821eb2fb08
child 60
ffb5b1e54eb2
permissions
-rw-r--r--

my own PDF routines to replace Panda.

eric@59 1 #include <stdio.h>
eric@59 2 #include <string.h>
eric@59 3
eric@59 4
eric@59 5 #include "libpdf.h"
eric@59 6 #include "libpdf_util.h"
eric@59 7 #include "libpdf_prim.h"
eric@59 8 #include "libpdf_private.h"
eric@59 9
eric@59 10
eric@59 11 struct pdf_g4_image
eric@59 12 {
eric@59 13 unsigned long Columns;
eric@59 14 unsigned long Rows;
eric@59 15 unsigned long rowbytes;
eric@59 16 int BlackIs1;
eric@59 17 unsigned char *data;
eric@59 18 unsigned long len;
eric@59 19 char XObject_name [4];
eric@59 20 };
eric@59 21
eric@59 22
eric@59 23 char pdf_new_XObject (pdf_page_handle pdf_page, struct pdf_obj *ind_ref)
eric@59 24 {
eric@59 25 char XObject_name [4] = "Im ";
eric@59 26
eric@59 27 XObject_name [2] = ++pdf_page->last_XObject_name;
eric@59 28
eric@59 29 if (! pdf_page->XObject_dict)
eric@59 30 {
eric@59 31 pdf_page->XObject_dict = pdf_new_obj (PT_DICTIONARY);
eric@59 32 pdf_set_dict_entry (pdf_page->resources, "XObject", pdf_page->XObject_dict);
eric@59 33 }
eric@59 34
eric@59 35 pdf_set_dict_entry (pdf_page->XObject_dict, & XObject_name [0], ind_ref);
eric@59 36
eric@59 37 return (pdf_page->last_XObject_name);
eric@59 38 }
eric@59 39
eric@59 40
eric@59 41 void pdf_write_g4_content_callback (pdf_file_handle pdf_file,
eric@59 42 struct pdf_obj *stream,
eric@59 43 void *app_data)
eric@59 44 {
eric@59 45 unsigned long width = (8.5 * 72); /* full width of page */
eric@59 46 unsigned long height = (11 * 72); /* full height of page */
eric@59 47 unsigned long x = 0; /* 0 is left edge */
eric@59 48 unsigned long y = 0; /* 0 is bottom edge */
eric@59 49 struct pdf_g4_image *image = app_data;
eric@59 50
eric@59 51 char str1 [100];
eric@59 52 char *str2 = "/";
eric@59 53 char *str3 = " Do\r\n";
eric@59 54
eric@59 55 /* width 0 0 height x y cm */
eric@59 56 sprintf (str1, "q %ld 0 0 %ld %ld %ld cm\r\n", width, height, x, y);
eric@59 57
eric@59 58 pdf_stream_write_data (pdf_file, stream, str1, strlen (str1));
eric@59 59 pdf_stream_write_data (pdf_file, stream, str2, strlen (str2));
eric@59 60 pdf_stream_write_data (pdf_file, stream, & image->XObject_name [0],
eric@59 61 strlen (& image->XObject_name [0]));
eric@59 62 pdf_stream_write_data (pdf_file, stream, str3, strlen (str3));
eric@59 63 }
eric@59 64
eric@59 65
eric@59 66 void pdf_write_g4_fax_image_callback (pdf_file_handle pdf_file,
eric@59 67 struct pdf_obj *stream,
eric@59 68 void *app_data)
eric@59 69 {
eric@59 70 struct pdf_g4_image *image = app_data;
eric@59 71
eric@59 72 #if 1
eric@59 73 pdf_stream_write_data (pdf_file, stream, image->data, image->len);
eric@59 74 #else
eric@59 75 unsigned long row = 0;
eric@59 76 unsigned char *ref;
eric@59 77 unsigned char *raw;
eric@59 78
eric@59 79 ref = NULL;
eric@59 80 raw = image->data;
eric@59 81
eric@59 82 while (row < image->Rows)
eric@59 83 {
eric@59 84 pdf_stream_write_data (pdf_file, stream, raw, image->rowbytes);
eric@59 85
eric@59 86 row++;
eric@59 87 ref = raw;
eric@59 88 raw += image->rowbytes;
eric@59 89 }
eric@59 90 /* $$$ generate and write EOFB code */
eric@59 91 /* $$$ flush any remaining buffered bits */
eric@59 92 #endif
eric@59 93 }
eric@59 94
eric@59 95
eric@59 96 void pdf_write_g4_fax_image (pdf_page_handle pdf_page,
eric@59 97 unsigned long Columns,
eric@59 98 unsigned long Rows,
eric@59 99 unsigned long rowbytes,
eric@59 100 int ImageMask,
eric@59 101 int BlackIs1, /* boolean, typ. false */
eric@59 102 unsigned char *data,
eric@59 103 unsigned long len)
eric@59 104 {
eric@59 105 struct pdf_g4_image *image;
eric@59 106
eric@59 107 struct pdf_obj *stream;
eric@59 108 struct pdf_obj *stream_dict;
eric@59 109 struct pdf_obj *decode_parms;
eric@59 110
eric@59 111 struct pdf_obj *content_stream;
eric@59 112
eric@59 113 image = pdf_calloc (sizeof (struct pdf_g4_image));
eric@59 114
eric@59 115 image->Columns = Columns;
eric@59 116 image->Rows = Rows;
eric@59 117 image->rowbytes = rowbytes;
eric@59 118 image->BlackIs1 = BlackIs1;
eric@59 119 image->data = data;
eric@59 120 image->len = len;
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@59 136 pdf_set_dict_entry (stream_dict, "Width", pdf_new_integer (Columns));
eric@59 137 pdf_set_dict_entry (stream_dict, "Height", pdf_new_integer (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@59 152 pdf_new_integer (Columns));
eric@59 153
eric@59 154 pdf_set_dict_entry (decode_parms,
eric@59 155 "Rows",
eric@59 156 pdf_new_integer (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