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/*
# out-strips.c: cut the entire image into strips.
#
# Copyright (C) 1992, 2011 Free Software Foundation, Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# 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, see <http://www.gnu.org/licenses/>.
#
*/
#include "config.h"
#include "gf.h"
#include "report.h"
#include "main.h"
#include "out-strips.h"
/* Output a ``font'' in which each ``character'' is a constant number of
scanlines from the image. This might use less than resources than
the giant PostScript file that -epsf outputs.
We only output the GF characters here; we assume the postamble and
preamble are written by the caller. */
void
write_chars_as_strips (image_header_type image_header, real design_size)
{
dimensions_type char_dimens;
gf_char_type gf_char;
unsigned gf_row;
unsigned lines_per_char;
one_byte *scanline;
real width_in_points;
boolean first_char = true;
unsigned scanline_count = 0;
/* Set up for the first character. We divide the image into 256 parts,
each of which will turn into one ``character''. */
lines_per_char = image_header.height / 256 + 1;
GF_CHARCODE (gf_char) = 0;
DIMENSIONS_WIDTH (char_dimens) = image_header.width;
DIMENSIONS_HEIGHT (char_dimens) = lines_per_char;
GF_BITMAP (gf_char) = new_bitmap (char_dimens);
GF_CHAR_MIN_COL (gf_char) = GF_CHAR_MIN_ROW (gf_char) = 0;
GF_CHAR_MAX_COL (gf_char) = DIMENSIONS_WIDTH (char_dimens);
GF_CHAR_MAX_ROW (gf_char) = DIMENSIONS_HEIGHT (char_dimens) - 1;
/* We aren't going to have any side bearings. */
GF_H_ESCAPEMENT (gf_char) = DIMENSIONS_WIDTH (char_dimens);
width_in_points = DIMENSIONS_WIDTH (char_dimens) * POINTS_PER_INCH
/ (real) image_header.hres;
GF_TFM_WIDTH (gf_char) = real_to_fix (width_in_points / design_size);
/* Read the image. */
while (true)
{
if (scanline_count % lines_per_char == 0)
{
/* We get here when scanline_count == 0, and we haven't read
anything, so we can't write anything. */
if (!first_char)
{
gf_put_char (gf_char);
REPORT2 ("[%u]%c", GF_CHARCODE (gf_char),
(GF_CHARCODE (gf_char) + 1) % 13 ? ' ' : '\n');
GF_CHARCODE (gf_char)++;
}
else
first_char = false;
gf_row = 0;
}
scanline = BITMAP_BITS (GF_BITMAP (gf_char))
+ gf_row * DIMENSIONS_WIDTH (char_dimens);
if (!(*image_get_scanline) (scanline)) break;
scanline_count++;
gf_row++;
}
if (scanline_count != image_header.height)
WARNING2 ("Expected %u scanlines, read %u", image_header.height,
scanline_count);
}
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