147 lines
3.6 KiB
C
147 lines
3.6 KiB
C
/*
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* tumble: build a PDF file from image files
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*
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* $Id: tumble_blank.c ... Exp $
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* Copyright ...
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation. Note that permission is
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* not granted to redistribute this program under the terms of any
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* other version of the General Public License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111 USA
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*
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* 2007-05-07 [JDB] New file to add support for blank pages.
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*/
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#include "semantics.h"
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#include "tumble.h"
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#include "bitblt.h"
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#include "pdf.h"
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#include "pdf_util.h"
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#include "pdf_prim.h"
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#include "pdf_private.h"
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#include "tumble_input.h"
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struct pdf_blank_page
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{
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double width;
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double height;
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double x;
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double y;
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double red;
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double green;
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double blue;
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};
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static bool match_blank_suffix (char *suffix)
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{
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return false;
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}
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static bool close_blank_input_file (void)
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{
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return true;
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}
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static bool open_blank_input_file (FILE *f, char *name)
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{
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return true;
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}
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static bool last_blank_input_page (void)
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{
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return true;
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}
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static bool get_blank_image_info (int image,
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input_attributes_t input_attributes,
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image_info_t *image_info)
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{
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if (input_attributes.has_page_size)
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{
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image_info->width_points = input_attributes.page_size.width * POINTS_PER_INCH;
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image_info->height_points = input_attributes.page_size.height * POINTS_PER_INCH;
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return true;
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}
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else
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return false;
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}
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static void pdf_write_blank_content_callback (pdf_file_handle pdf_file,
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pdf_obj_handle stream,
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void *app_data)
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{
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struct pdf_blank_page *page = app_data;
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pdf_stream_printf (pdf_file, stream,
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"%g %g %g rg\r\n%g %g %g %g re\r\nf\r\n",
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page->red, page->green, page->blue,
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page->x, page->y,
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page->width, page->height);
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}
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static bool process_blank_image (int image, /* range 1 .. n */
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input_attributes_t input_attributes,
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image_info_t *image_info,
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pdf_page_handle pdf_page,
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output_attributes_t output_attributes)
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{
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struct pdf_blank_page *page;
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/* If colormap set, use "white" color and draw rectangle to cover page. */
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if (output_attributes.colormap)
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{
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page = pdf_calloc (1, sizeof (struct pdf_blank_page));
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page->width = image_info->width_points;
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page->height = image_info->height_points;
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page->x = 0;
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page->y = 0;
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page->red = (double) output_attributes.colormap->white_map.red / 255.0;
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page->green = (double) output_attributes.colormap->white_map.green / 255.0;
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page->blue = (double) output_attributes.colormap->white_map.blue / 255.0;
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pdf_obj_handle content_stream = pdf_new_ind_ref(pdf_page->pdf_file,
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pdf_new_stream (pdf_page->pdf_file,
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pdf_new_obj (PT_DICTIONARY),
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& pdf_write_blank_content_callback,
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page));
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pdf_page_add_content_stream(pdf_page, content_stream);
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}
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return true;
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}
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input_handler_t blank_handler =
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{
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match_blank_suffix,
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open_blank_input_file,
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close_blank_input_file,
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last_blank_input_page,
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get_blank_image_info,
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process_blank_image
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};
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