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zint/backend/pcx.c

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/* pcx.c - Handles output to ZSoft PCX file */
/* ZSoft PCX File Format Technical Reference Manual http://bespin.org/~qz/pc-gpe/pcx.txt */
/*
libzint - the open source barcode library
Copyright (C) 2009 - 2020 Robin Stuart <rstuart114@gmail.com>
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. Neither the name of the project nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
*/
/* vim: set ts=4 sw=4 et : */
#include <stdio.h>
#include <string.h>
#include "common.h"
#include "pcx.h" /* PCX header structure */
#include <math.h>
#ifdef _MSC_VER
#include <io.h>
#include <fcntl.h>
#include <malloc.h>
#endif
INTERNAL int pcx_pixel_plot(struct zint_symbol *symbol, unsigned char *pixelbuf) {
int fgred, fggrn, fgblu, bgred, bggrn, bgblu;
int row, column, i, colour;
int run_count;
FILE *pcx_file;
pcx_header_t header;
int bytes_per_line = symbol->bitmap_width + (symbol->bitmap_width & 1); // Must be even
unsigned char previous;
#ifdef _MSC_VER
unsigned char* rle_row;
#endif
#ifndef _MSC_VER
unsigned char rle_row[bytes_per_line];
#else
rle_row = (unsigned char *) _alloca(bytes_per_line);
#endif /* _MSC_VER */
rle_row[bytes_per_line - 1] = 0; // Will remain zero if bitmap_width odd
fgred = (16 * ctoi(symbol->fgcolour[0])) + ctoi(symbol->fgcolour[1]);
fggrn = (16 * ctoi(symbol->fgcolour[2])) + ctoi(symbol->fgcolour[3]);
fgblu = (16 * ctoi(symbol->fgcolour[4])) + ctoi(symbol->fgcolour[5]);
bgred = (16 * ctoi(symbol->bgcolour[0])) + ctoi(symbol->bgcolour[1]);
bggrn = (16 * ctoi(symbol->bgcolour[2])) + ctoi(symbol->bgcolour[3]);
bgblu = (16 * ctoi(symbol->bgcolour[4])) + ctoi(symbol->bgcolour[5]);
header.manufacturer = 10; // ZSoft
header.version = 5; // Version 3.0
header.encoding = 1; // Run length encoding
header.bits_per_pixel = 8;
header.window_xmin = 0;
header.window_ymin = 0;
header.window_xmax = symbol->bitmap_width - 1;
header.window_ymax = symbol->bitmap_height - 1;
header.horiz_dpi = 300;
header.vert_dpi = 300;
for (i = 0; i < 48; i++) {
header.colourmap[i] = 0x00;
}
header.reserved = 0;
header.number_of_planes = 3;
header.bytes_per_line = bytes_per_line;
header.palette_info = 1; // Colour
header.horiz_screen_size = 0;
header.vert_screen_size = 0;
for (i = 0; i < 54; i++) {
header.filler[i] = 0x00;
}
/* Open output file in binary mode */
if (symbol->output_options & BARCODE_STDOUT) {
#ifdef _MSC_VER
if (-1 == _setmode(_fileno(stdout), _O_BINARY)) {
strcpy(symbol->errtxt, "620: Can't open output file");
return ZINT_ERROR_FILE_ACCESS;
}
#endif
pcx_file = stdout;
} else {
if (!(pcx_file = fopen(symbol->outfile, "wb"))) {
strcpy(symbol->errtxt, "621: Can't open output file");
return ZINT_ERROR_FILE_ACCESS;
}
}
fwrite(&header, sizeof (pcx_header_t), 1, pcx_file);
for (row = 0; row < symbol->bitmap_height; row++) {
for (colour = 0; colour < 3; colour++) {
for (column = 0; column < symbol->bitmap_width; column++) {
switch (colour) {
case 0:
switch(pixelbuf[(row * symbol->bitmap_width) + column]) {
case 'W': // White
case 'M': // Magenta
case 'R': // Red
case 'Y': // Yellow
rle_row[column] = 255;
break;
case 'C': // Cyan
case 'B': // Blue
case 'G': // Green
case 'K': // Black
rle_row[column] = 0;
break;
case '1':
rle_row[column] = fgred;
break;
default:
rle_row[column] = bgred;
break;
}
break;
case 1:
switch(pixelbuf[(row * symbol->bitmap_width) + column]) {
case 'W': // White
case 'C': // Cyan
case 'Y': // Yellow
case 'G': // Green
rle_row[column] = 255;
break;
case 'B': // Blue
case 'M': // Magenta
case 'R': // Red
case 'K': // Black
rle_row[column] = 0;
break;
case '1':
rle_row[column] = fggrn;
break;
default:
rle_row[column] = bggrn;
break;
}
break;
case 2:
switch(pixelbuf[(row * symbol->bitmap_width) + column]) {
case 'W': // White
case 'C': // Cyan
case 'B': // Blue
case 'M': // Magenta
rle_row[column] = 255;
break;
case 'R': // Red
case 'Y': // Yellow
case 'G': // Green
case 'K': // Black
rle_row[column] = 0;
break;
case '1':
rle_row[column] = fgblu;
break;
default:
rle_row[column] = bgblu;
break;
}
break;
}
}
/* Based on ImageMagick/coders/pcx.c PCXWritePixels()
* Copyright 1999-2020 ImageMagick Studio LLC */
previous = rle_row[0];
run_count = 1;
for (column = 1; column < bytes_per_line; column++) { // Note going up to bytes_per_line
if ((previous == rle_row[column]) && (run_count < 63)) {
run_count++;
} else {
if (run_count > 1 || (previous & 0xc0) == 0xc0) {
run_count += 0xc0;
fputc(run_count, pcx_file);
}
fputc(previous, pcx_file);
previous = rle_row[column];
run_count = 1;
}
}
if (run_count > 1 || (previous & 0xc0) == 0xc0) {
run_count += 0xc0;
fputc(run_count, pcx_file);
}
fputc(previous, pcx_file);
}
}
fclose(pcx_file);
return 0;
}
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