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227 lines
8.7 KiB
C
227 lines
8.7 KiB
C
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/* pcx.c - Handles output to ZSoft PCX file */
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/* ZSoft PCX File Format Technical Reference Manual http://bespin.org/~qz/pc-gpe/pcx.txt */
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/*
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libzint - the open source barcode library
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Copyright (C) 2009 - 2021 Robin Stuart <rstuart114@gmail.com>
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. Neither the name of the project nor the names of its contributors
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may be used to endorse or promote products derived from this software
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without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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SUCH DAMAGE.
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*/
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/* vim: set ts=4 sw=4 et : */
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#include <errno.h>
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#include <stdio.h>
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#include "common.h"
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#include "pcx.h" /* PCX header structure */
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#include <math.h>
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#ifdef _MSC_VER
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#include <io.h>
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#include <fcntl.h>
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#include <malloc.h>
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#endif
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INTERNAL int pcx_pixel_plot(struct zint_symbol *symbol, unsigned char *pixelbuf) {
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int fgred, fggrn, fgblu, bgred, bggrn, bgblu;
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int row, column, i, colour;
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int run_count;
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FILE *pcx_file;
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pcx_header_t header;
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int bytes_per_line = symbol->bitmap_width + (symbol->bitmap_width & 1); // Must be even
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unsigned char previous;
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const int output_to_stdout = symbol->output_options & BARCODE_STDOUT; /* Suppress gcc -fanalyzer warning */
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#ifdef _MSC_VER
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unsigned char *rle_row;
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#endif
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#ifndef _MSC_VER
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unsigned char rle_row[bytes_per_line];
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#else
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rle_row = (unsigned char *) _alloca(bytes_per_line);
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#endif /* _MSC_VER */
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rle_row[bytes_per_line - 1] = 0; // Will remain zero if bitmap_width odd
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fgred = (16 * ctoi(symbol->fgcolour[0])) + ctoi(symbol->fgcolour[1]);
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fggrn = (16 * ctoi(symbol->fgcolour[2])) + ctoi(symbol->fgcolour[3]);
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fgblu = (16 * ctoi(symbol->fgcolour[4])) + ctoi(symbol->fgcolour[5]);
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bgred = (16 * ctoi(symbol->bgcolour[0])) + ctoi(symbol->bgcolour[1]);
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bggrn = (16 * ctoi(symbol->bgcolour[2])) + ctoi(symbol->bgcolour[3]);
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bgblu = (16 * ctoi(symbol->bgcolour[4])) + ctoi(symbol->bgcolour[5]);
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header.manufacturer = 10; // ZSoft
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header.version = 5; // Version 3.0
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header.encoding = 1; // Run length encoding
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header.bits_per_pixel = 8;
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header.window_xmin = 0;
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header.window_ymin = 0;
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header.window_xmax = symbol->bitmap_width - 1;
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header.window_ymax = symbol->bitmap_height - 1;
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header.horiz_dpi = 300;
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header.vert_dpi = 300;
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for (i = 0; i < 48; i++) {
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header.colourmap[i] = 0x00;
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}
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header.reserved = 0;
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header.number_of_planes = 3;
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header.bytes_per_line = bytes_per_line;
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header.palette_info = 1; // Colour
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header.horiz_screen_size = 0;
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header.vert_screen_size = 0;
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for (i = 0; i < 54; i++) {
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header.filler[i] = 0x00;
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}
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/* Open output file in binary mode */
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if (output_to_stdout) {
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#ifdef _MSC_VER
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if (-1 == _setmode(_fileno(stdout), _O_BINARY)) {
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sprintf(symbol->errtxt, "620: Could not set stdout to binary (%d: %.30s)", errno, strerror(errno));
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return ZINT_ERROR_FILE_ACCESS;
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}
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#endif
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pcx_file = stdout;
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} else {
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if (!(pcx_file = fopen(symbol->outfile, "wb"))) {
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sprintf(symbol->errtxt, "621: Could not open output file (%d: %.30s)", errno, strerror(errno));
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return ZINT_ERROR_FILE_ACCESS;
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}
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}
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fwrite(&header, sizeof(pcx_header_t), 1, pcx_file);
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for (row = 0; row < symbol->bitmap_height; row++) {
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for (colour = 0; colour < 3; colour++) {
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for (column = 0; column < symbol->bitmap_width; column++) {
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switch (colour) {
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case 0:
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switch (pixelbuf[(row * symbol->bitmap_width) + column]) {
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case 'W': // White
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case 'M': // Magenta
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case 'R': // Red
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case 'Y': // Yellow
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rle_row[column] = 255;
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break;
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case 'C': // Cyan
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case 'B': // Blue
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case 'G': // Green
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case 'K': // Black
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rle_row[column] = 0;
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break;
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case '1':
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rle_row[column] = fgred;
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break;
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default:
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rle_row[column] = bgred;
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break;
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}
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break;
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case 1:
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switch (pixelbuf[(row * symbol->bitmap_width) + column]) {
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case 'W': // White
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case 'C': // Cyan
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case 'Y': // Yellow
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case 'G': // Green
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rle_row[column] = 255;
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break;
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case 'B': // Blue
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case 'M': // Magenta
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case 'R': // Red
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case 'K': // Black
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rle_row[column] = 0;
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break;
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case '1':
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rle_row[column] = fggrn;
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break;
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default:
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rle_row[column] = bggrn;
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break;
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}
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break;
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case 2:
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switch (pixelbuf[(row * symbol->bitmap_width) + column]) {
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case 'W': // White
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case 'C': // Cyan
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case 'B': // Blue
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case 'M': // Magenta
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rle_row[column] = 255;
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break;
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case 'R': // Red
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case 'Y': // Yellow
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case 'G': // Green
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case 'K': // Black
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rle_row[column] = 0;
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break;
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case '1':
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rle_row[column] = fgblu;
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break;
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default:
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rle_row[column] = bgblu;
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break;
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}
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break;
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}
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}
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/* Based on ImageMagick/coders/pcx.c PCXWritePixels()
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* Copyright 1999-2020 ImageMagick Studio LLC */
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previous = rle_row[0];
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run_count = 1;
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for (column = 1; column < bytes_per_line; column++) { // Note going up to bytes_per_line
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if ((previous == rle_row[column]) && (run_count < 63)) {
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run_count++;
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} else {
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if (run_count > 1 || (previous & 0xc0) == 0xc0) {
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run_count += 0xc0;
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fputc(run_count, pcx_file);
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}
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fputc(previous, pcx_file);
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previous = rle_row[column];
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run_count = 1;
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}
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}
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if (run_count > 1 || (previous & 0xc0) == 0xc0) {
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run_count += 0xc0;
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fputc(run_count, pcx_file);
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}
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fputc(previous, pcx_file);
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}
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}
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if (output_to_stdout) {
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fflush(pcx_file);
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} else {
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fclose(pcx_file);
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}
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return 0;
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}
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