tumble: t2p.c@20fda1ec5f17 (annotated)

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t2p.c@20fda1ec5f17 (annotated)

t2p.c

Sun, 25 Aug 2002 13:22:42 +0000

author: eric
date: Sun, 25 Aug 2002 13:22:42 +0000
changeset 46: 20fda1ec5f17
parent 44: 0f78374addae
child 47: bfc6aaa089b0
permissions: -rw-r--r--

only call resize_bitmap if necessary

 /*
  * t2p: Create a PDF file from the contents of one or more TIFF
  *      bilevel image files.  The images in the resulting PDF file
  *      will be compressed using ITU-T T.6 (G4) fax encoding.
  *
  * Main program
  * $Id: t2p.c,v 1.17 2002/08/25 05:22:42 eric Exp $
  * Copyright 2001 Eric Smith <eric@brouhaha.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.  Note that permission is
  * not granted to redistribute this program under the terms of any
  * other version of the General Public License.
  *
  * 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, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111 USA */
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
 #include <tiffio.h>
 #include <panda/functions.h>
 #include <panda/constants.h>
 #include "type.h"
 #include "bitblt.h"
 #include "semantics.h"
 #include "parser.tab.h"
 #include "t2p.h"
 #define POINTS_PER_INCH 72
 /* page size limited by Acrobat Reader to 45 inches on a side */
 #define PAGE_MAX_INCHES 45
 #define PAGE_MAX_POINTS (PAGE_MAX_INCHES * POINTS_PER_INCH)
 typedef struct output_file_t
 {
   struct output_file_t *next;
   char *name;
   panda_pdf *pdf;
 } output_file_t;
 char *in_filename;
 TIFF *in;
 output_file_t *output_files;
 output_file_t *out;
 /* panda_pdf *out; */
 boolean close_tiff_input_file (void)
 {
   if (in)
     {
       free (in_filename);
       TIFFClose (in);
     }
   in = NULL;
   in_filename = NULL;
   return (1);
 }
 boolean open_tiff_input_file (char *name)
 {
   if (in)
     {
       if (strcmp (name, in_filename) == 0)
 	return (1);
       close_tiff_input_file ();
     }
   in_filename = strdup (name);
   if (! in_filename)
     {
       fprintf (stderr, "can't strdup input filename '%s'\n", name);
       return (0);
     }
   in = TIFFOpen (name, "r");
   if (! in)
     {
       fprintf (stderr, "can't open input file '%s'\n", name);
       free (in_filename);
       return (0);
     }
   return (1);
 }
 boolean close_pdf_output_files (void)
 {
   output_file_t *o, *n;
   for (o = output_files; o; o = n)
     {
       n = o->next;
       panda_close (o->pdf);
       free (o->name);
       free (o);
     }
   out = NULL;
   output_files = NULL;
   return (1);
 }
 boolean open_pdf_output_file (char *name,
 			      pdf_file_attributes_t *attributes)
 {
   output_file_t *o;
   if (out && (strcmp (name, out->name) == 0))
     return (1);
   for (o = output_files; o; o = o->next)
     if (strcmp (name, o->name) == 0)
       {
 	out = o;
 	return (1);
       }
   o = calloc (1, sizeof (output_file_t));
   if (! o)
     {
       fprintf (stderr, "can't calloc output file struct for '%s'\n", name);
       return (0);
    }
   o->name = strdup (name);
   if (! o->name)
     {
       fprintf (stderr, "can't strdup output filename '%s'\n", name);
       free (o);
       return (0);
     }
   o->pdf = panda_open (name, "w");
   if (! o->pdf)
     {
       fprintf (stderr, "can't open output file '%s'\n", name);
       free (o->name);
       free (o);
       return (0);
     }
   if (attributes->author)
     panda_setauthor (o->pdf, attributes->author);
   if (attributes->creator)
     panda_setcreator (o->pdf, attributes->creator);
   if (attributes->title)
     panda_settitle (o->pdf, attributes->title);
   if (attributes->subject)
     panda_setsubject (o->pdf, attributes->subject);
   if (attributes->keywords)
     panda_setkeywords (o->pdf, attributes->keywords);
   /* prepend new output file onto list */
   o->next = output_files;
   output_files = o;
   out = o;
   return (1);
 }
 void process_page_numbers (int page_index,
 			   int count,
 			   int base,
 			   page_label_t *page_label)
 {
 }
 /* frees original! */
 static Bitmap *resize_bitmap (Bitmap *src,
 			      float x_resolution,
 			      float y_resolution,
 			      input_attributes_t input_attributes)
 {
   Rect src_rect;
   Point dest_min;
   Bitmap *dest;
   int width_pixels = input_attributes.page_size.width * x_resolution;
   int height_pixels = input_attributes.page_size.height * y_resolution;
   src_rect.min.x = (rect_width (& src->rect) - width_pixels) / 2;
   src_rect.min.y = (rect_height (& src->rect) - height_pixels) / 2;
   src_rect.max.x = src_rect.min.x + width_pixels;
   src_rect.max.y = src_rect.min.y + height_pixels;
   dest_min.x = 0;
   dest_min.y = 0;
   dest = bitblt (src, & src_rect, NULL, & dest_min, TF_SRC, 0);
   free_bitmap (src);
   return (dest);
 }
 /* "in place" rotation */
 static void rotate_bitmap (Bitmap *src,
 			   input_attributes_t input_attributes)
 {
   switch (input_attributes.rotation)
     {
     case 0: break;
     case 90: rot_90 (src); break;
     case 180: rot_180 (src); break;
     case 270: rot_270 (src); break;
     default:
       fprintf (stderr, "rotation must be 0, 90, 180, or 270\n");
     }
 }
 #define SWAP(type,a,b) do { type temp; temp = a; a = b; b = temp; } while (0)
 boolean process_page (int image,  /* range 1 .. n */
 		      input_attributes_t input_attributes,
 		      bookmark_t *bookmarks)
 {
   int result = 0;
   u32 image_length, image_width;
   u32 dest_image_length, dest_image_width;
 #ifdef CHECK_DEPTH
   u32 image_depth;
 #endif
   u16 samples_per_pixel;
   u16 bits_per_sample;
   u16 planar_config;
   u16 resolution_unit;
   float x_resolution, y_resolution;
   float dest_x_resolution, dest_y_resolution;
   int width_points, height_points;  /* really 1/72 inch units rather than
 				       points */
   Rect rect;
   Bitmap *bitmap;
   int row;
   panda_page *page;
   int tiff_temp_fd;
   char tiff_temp_fn [] = "/var/tmp/t2p-XXXXXX\0";
   TIFF *tiff_temp;
   char pagesize [26];  /* Needs to hold two ints of four characters (0..3420),
 			  two zeros, three spaces, two brackets, and a NULL.
                           Added an extra ten characters just in case. */
   if (! TIFFSetDirectory (in, image - 1))
     {
       fprintf (stderr, "can't find page %d of input file\n", image);
       goto fail;
     }
   if (1 != TIFFGetField (in, TIFFTAG_IMAGELENGTH, & image_length))
     {
       fprintf (stderr, "can't get image length\n");
       goto fail;
     }
   if (1 != TIFFGetField (in, TIFFTAG_IMAGEWIDTH, & image_width))
     {
       fprintf (stderr, "can't get image width\n");
       goto fail;
     }
   if (1 != TIFFGetField (in, TIFFTAG_SAMPLESPERPIXEL, & samples_per_pixel))
     {
       fprintf (stderr, "can't get samples per pixel\n");
       goto fail;
     }
 #ifdef CHECK_DEPTH
   if (1 != TIFFGetField (in, TIFFTAG_IMAGEDEPTH, & image_depth))
     {
       fprintf (stderr, "can't get image depth\n");
       goto fail;
     }
 #endif
   if (1 != TIFFGetField (in, TIFFTAG_BITSPERSAMPLE, & bits_per_sample))
     {
       fprintf (stderr, "can't get bits per sample\n");
       goto fail;
     }
   if (1 != TIFFGetField (in, TIFFTAG_PLANARCONFIG, & planar_config))
     planar_config = 1;
   if (1 != TIFFGetField (in, TIFFTAG_RESOLUTIONUNIT, & resolution_unit))
     resolution_unit = 2;
   if (1 != TIFFGetField (in, TIFFTAG_XRESOLUTION, & x_resolution))
     x_resolution = 300;
   if (1 != TIFFGetField (in, TIFFTAG_YRESOLUTION, & y_resolution))
     y_resolution = 300;
   if (samples_per_pixel != 1)
     {
       fprintf (stderr, "samples per pixel %u, must be 1\n", samples_per_pixel);
       goto fail;
     }
 #ifdef CHECK_DEPTH
   if (image_depth != 1)
     {
       fprintf (stderr, "image depth %u, must be 1\n", image_depth);
       goto fail;
     }
 #endif
   if (bits_per_sample != 1)
     {
       fprintf (stderr, "bits per sample %u, must be 1\n", bits_per_sample);
       goto fail;
     }
   if (planar_config != 1)
     {
       fprintf (stderr, "planar config %u, must be 1\n", planar_config);
       goto fail;
     }
   if (input_attributes.has_resolution)
     {
       x_resolution = input_attributes.x_resolution;
       y_resolution = input_attributes.y_resolution;
     }
   if ((input_attributes.rotation == 90) || (input_attributes.rotation == 270))
     {
       dest_image_width  = image_length;
       dest_image_length = image_width;
       dest_x_resolution = y_resolution;
       dest_y_resolution = x_resolution;
       SWAP (int, width_points, height_points);
     }
   else
     {
       dest_image_width = image_width;
       dest_image_length = image_length;
       dest_x_resolution = x_resolution;
       dest_y_resolution = y_resolution;
     }
   rect.min.x = 0;
   rect.min.y = 0;
   rect.max.x = image_width;
   rect.max.y = image_length;
   bitmap = create_bitmap (& rect);
   if (! bitmap)
     {
       fprintf (stderr, "can't allocate bitmap\n");
       goto fail;
     }
   for (row = 0; row < image_length; row++)
     if (1 != TIFFReadScanline (in,
 			       bitmap->bits + row * bitmap->row_words,
 			       row,
 ))
       {
 	fprintf (stderr, "can't read TIFF scanline\n");
 	goto fail;
       }
   if (input_attributes.has_page_size)
     bitmap = resize_bitmap (bitmap,
 			    x_resolution,
 			    y_resolution,
 			    input_attributes);
   rotate_bitmap (bitmap,
 		 input_attributes);
   tiff_temp_fd = mkstemp (tiff_temp_fn);
   if (tiff_temp_fd < 0)
     {
       fprintf (stderr, "can't create temporary TIFF file\n");
       goto fail;
     }
   tiff_temp = TIFFFdOpen (tiff_temp_fd, tiff_temp_fn, "w");
   if (! out)
     {
       fprintf (stderr, "can't open temporary TIFF file '%s'\n", tiff_temp_fn);
       goto fail;
     }
   TIFFSetField (tiff_temp, TIFFTAG_IMAGELENGTH, rect_height (& bitmap->rect));
   TIFFSetField (tiff_temp, TIFFTAG_IMAGEWIDTH, rect_width (& bitmap->rect));
   TIFFSetField (tiff_temp, TIFFTAG_PLANARCONFIG, planar_config);
   TIFFSetField (tiff_temp, TIFFTAG_ROWSPERSTRIP, rect_height (& bitmap->rect));
   TIFFSetField (tiff_temp, TIFFTAG_RESOLUTIONUNIT, resolution_unit);
   TIFFSetField (tiff_temp, TIFFTAG_XRESOLUTION, dest_x_resolution);
   TIFFSetField (tiff_temp, TIFFTAG_YRESOLUTION, dest_y_resolution);
   TIFFSetField (tiff_temp, TIFFTAG_SAMPLESPERPIXEL, samples_per_pixel);
   TIFFSetField (tiff_temp, TIFFTAG_BITSPERSAMPLE, bits_per_sample);
   TIFFSetField (tiff_temp, TIFFTAG_COMPRESSION, COMPRESSION_CCITTFAX4);
   TIFFSetField (tiff_temp, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_MINISWHITE);
   for (row = 0; row < rect_height (& bitmap->rect); row++)
     if (1 != TIFFWriteScanline (tiff_temp,
 				bitmap->bits + row * bitmap->row_words,
 				row,
 ))
       {
 	fprintf (stderr, "can't write TIFF scanline\n");
 	goto fail;
       }
   TIFFClose (tiff_temp);
   width_points = (rect_width (& bitmap->rect) / dest_x_resolution) * POINTS_PER_INCH;
   height_points = (rect_height (& bitmap->rect) / dest_y_resolution) * POINTS_PER_INCH;
   free_bitmap (bitmap);
   if ((height_points > PAGE_MAX_POINTS) || (width_points > PAGE_MAX_POINTS))
     {
       fprintf (stdout, "image too large (max %d inches on a side\n", PAGE_MAX_INCHES);
       goto fail;
     }
   sprintf (pagesize, "[0 0 %d %d]", width_points, height_points);
   page = panda_newpage (out->pdf, pagesize);
   panda_imagebox (out->pdf,
 		  page,
 , /* top */
 , /* left */
 		  height_points, /* bottom */
 		  width_points, /* right */
 		  tiff_temp_fn,
 		  panda_image_tiff);
   result = 1;
  fail:
   if (tiff_temp_fd)
     unlink (tiff_temp_fn);
   return (result);
 }
 int main (int argc, char *argv[])
 {
   int result = 0;
   panda_init ();
   if (argc != 2)
     {
       fprintf (stderr, "usage: %s spec\n", argv [0]);
       result = 1;
       goto fail;
     }
   if (! parse_spec_file (argv [1]))
     {
       result = 2;
       goto fail;
     }
   if (! process_specs ())
     {
       result = 3;
       goto fail;
     }
  fail:
   close_tiff_input_file ();
   close_pdf_output_files ();
   return (result);
 }

tumble / annotate

t2p.c@20fda1ec5f17 (annotated)

t2p.c