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https://github.com/zint/zint
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463 lines
17 KiB
C
463 lines
17 KiB
C
/* ps.c - Post Script output */
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/*
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libzint - the open source barcode library
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Copyright (C) 2009-2020 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 <locale.h>
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#include <stdio.h>
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#include <math.h>
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#ifdef _MSC_VER
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#include <malloc.h>
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#endif
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#include "common.h"
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static void colour_to_pscolor(int option, int colour, char* output) {
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strcpy(output, "");
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if ((option & CMYK_COLOUR) == 0) {
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// Use RGB colour space
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switch(colour) {
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case 1: // Cyan
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strcat(output, "0.00 1.00 1.00");
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break;
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case 2: // Blue
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strcat(output, "0.00 0.00 1.00");
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break;
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case 3: // Magenta
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strcat(output, "1.00 0.00 1.00");
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break;
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case 4: // Red
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strcat(output, "1.00 0.00 0.00");
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break;
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case 5: // Yellow
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strcat(output, "1.00 1.00 0.00");
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break;
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case 6: // Green
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strcat(output, "0.00 1.00 0.00");
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break;
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case 8: // White
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strcat(output, "1.00 1.00 1.00");
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break;
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default: // Black
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strcat(output, "0.00 0.00 0.00");
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break;
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}
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strcat(output, " setrgbcolor");
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} else {
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// Use CMYK colour space
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switch(colour) {
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case 1: // Cyan
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strcat(output, "1.00 0.00 0.00 0.00");
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break;
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case 2: // Blue
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strcat(output, "1.00 1.00 0.00 0.00");
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break;
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case 3: // Magenta
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strcat(output, "0.00 1.00 0.00 0.00");
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break;
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case 4: // Red
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strcat(output, "0.00 1.00 1.00 0.00");
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break;
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case 5: // Yellow
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strcat(output, "0.00 0.00 1.00 0.00");
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break;
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case 6: // Green
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strcat(output, "1.00 0.00 1.00 0.00");
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break;
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case 8: // White
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strcat(output, "0.00 0.00 0.00 0.00");
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break;
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default: // Black
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strcat(output, "0.00 0.00 0.00 1.00");
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break;
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}
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strcat(output, " setcmykcolor");
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}
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}
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STATIC_UNLESS_ZINT_TEST void ps_convert(const unsigned char *string, unsigned char *ps_string) {
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const unsigned char *s;
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unsigned char *p = ps_string;
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for (s = string; *s; s++) {
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switch (*s) {
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case '(':
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case ')':
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case '\\':
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*p++ = '\\';
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*p++ = *s;
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break;
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case 0xC2: /* See `to_iso8859_1()` in raster.c */
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*p++ = *++s;
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break;
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case 0xC3:
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*p++ = *++s + 64;
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break;
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default:
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if (*s < 0x80) {
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*p++ = *s;
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}
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break;
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}
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}
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*p = '\0';
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}
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INTERNAL int ps_plot(struct zint_symbol *symbol) {
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FILE *feps;
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int fgred, fggrn, fgblu, bgred, bggrn, bgblu;
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float red_ink, green_ink, blue_ink, red_paper, green_paper, blue_paper;
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float cyan_ink, magenta_ink, yellow_ink, black_ink;
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float cyan_paper, magenta_paper, yellow_paper, black_paper;
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int error_number = 0;
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float ax, ay, bx, by, cx, cy, dx, dy, ex, ey, fx, fy;
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float previous_diameter;
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float radius, half_radius, half_sqrt3_radius;
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int colour_index, colour_rect_counter;
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char ps_color[30];
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int draw_background = 1;
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struct zint_vector_rect *rect;
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struct zint_vector_hexagon *hex;
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struct zint_vector_circle *circle;
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struct zint_vector_string *string;
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const char *locale = NULL;
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const char *font;
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int i, len;
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int ps_len = 0;
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int iso_latin1 = 0;
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#ifdef _MSC_VER
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unsigned char *ps_string;
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#endif
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if (strlen(symbol->bgcolour) > 6) {
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if ((ctoi(symbol->bgcolour[6]) == 0) && (ctoi(symbol->bgcolour[7]) == 0)) {
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draw_background = 0;
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}
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}
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if (symbol->output_options & BARCODE_STDOUT) {
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feps = stdout;
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} else {
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feps = fopen(symbol->outfile, "w");
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}
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if (feps == NULL) {
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symbol->err_origin = 645;
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strcpy(symbol->errtxt, _("Can't open output file"));
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return ZINT_ERROR_FILE_ACCESS;
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}
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locale = setlocale(LC_ALL, "C");
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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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red_ink = (float) (fgred / 256.0);
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green_ink = (float) (fggrn / 256.0);
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blue_ink = (float) (fgblu / 256.0);
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red_paper = (float) (bgred / 256.0);
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green_paper = (float) (bggrn / 256.0);
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blue_paper = (float) (bgblu / 256.0);
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/* Convert RGB to CMYK */
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if (red_ink > green_ink) {
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if (blue_ink > red_ink) {
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black_ink = 1.0f - blue_ink;
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} else {
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black_ink = 1.0f - red_ink;
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}
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} else {
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if (blue_ink > red_ink) {
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black_ink = 1.0f - blue_ink;
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} else {
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black_ink = 1.0f - green_ink;
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}
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}
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if (black_ink < 1.0f) {
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cyan_ink = (1.0f - red_ink - black_ink) / (1.0f - black_ink);
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magenta_ink = (1.0f - green_ink - black_ink) / (1.0f - black_ink);
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yellow_ink = (1.0f - blue_ink - black_ink) / (1.0f - black_ink);
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} else {
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cyan_ink = 0.0f;
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magenta_ink = 0.0f;
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yellow_ink = 0.0f;
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}
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if (red_paper > green_paper) {
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if (blue_paper > red_paper) {
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black_paper = 1.0f - blue_paper;
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} else {
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black_paper = 1.0f - red_paper;
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}
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} else {
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if (blue_paper > red_paper) {
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black_paper = 1.0f - blue_paper;
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} else {
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black_paper = 1.0f - green_paper;
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}
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}
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if (black_paper < 1.0f) {
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cyan_paper = (1.0f - red_paper - black_paper) / (1.0f - black_paper);
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magenta_paper = (1.0f - green_paper - black_paper) / (1.0f - black_paper);
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yellow_paper = (1.0f - blue_paper - black_paper) / (1.0f - black_paper);
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} else {
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cyan_paper = 0.0f;
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magenta_paper = 0.0f;
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yellow_paper = 0.0f;
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}
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for (i = 0, len = (int) ustrlen(symbol->text); i < len; i++) {
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switch (symbol->text[i]) {
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case '(':
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case ')':
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case '\\':
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ps_len += 2;
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break;
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default:
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if (!iso_latin1 && symbol->text[i] >= 0x80) {
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iso_latin1 = 1;
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}
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ps_len++; /* Will overcount 2 byte UTF-8 chars */
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break;
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}
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}
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#ifndef _MSC_VER
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unsigned char ps_string[ps_len + 1];
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#else
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ps_string = (unsigned char *) _alloca(ps_len + 1);
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#endif
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/* Start writing the header */
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fprintf(feps, "%%!PS-Adobe-3.0 EPSF-3.0\n");
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if (ZINT_VERSION_BUILD) {
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fprintf(feps, "%%%%Creator: Zint %d.%d.%d.%d\n", ZINT_VERSION_MAJOR, ZINT_VERSION_MINOR, ZINT_VERSION_RELEASE, ZINT_VERSION_BUILD);
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} else {
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fprintf(feps, "%%%%Creator: Zint %d.%d.%d\n", ZINT_VERSION_MAJOR, ZINT_VERSION_MINOR, ZINT_VERSION_RELEASE);
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}
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fprintf(feps, "%%%%Title: Zint Generated Symbol\n");
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fprintf(feps, "%%%%Pages: 0\n");
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fprintf(feps, "%%%%BoundingBox: 0 0 %d %d\n", (int) ceil(symbol->vector->width), (int) ceil(symbol->vector->height));
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fprintf(feps, "%%%%EndComments\n");
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/* Definitions */
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fprintf(feps, "/TL { setlinewidth moveto lineto stroke } bind def\n");
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fprintf(feps, "/TD { newpath 0 360 arc fill } bind def\n");
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fprintf(feps, "/TH { 0 setlinewidth moveto lineto lineto lineto lineto lineto closepath fill } bind def\n");
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fprintf(feps, "/TB { 2 copy } bind def\n");
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fprintf(feps, "/TR { newpath 4 1 roll exch moveto 1 index 0 rlineto 0 exch rlineto neg 0 rlineto closepath fill } bind def\n");
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fprintf(feps, "/TE { pop pop } bind def\n");
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fprintf(feps, "newpath\n");
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/* Now the actual representation */
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//Background
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if (draw_background) {
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if ((symbol->output_options & CMYK_COLOUR) == 0) {
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fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_paper, green_paper, blue_paper);
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} else {
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fprintf(feps, "%.2f %.2f %.2f %.2f setcmykcolor\n", cyan_paper, magenta_paper, yellow_paper, black_paper);
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}
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fprintf(feps, "%.2f 0.00 TB 0.00 %.2f TR\n", symbol->vector->height, symbol->vector->width);
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fprintf(feps, "TE\n");
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}
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if (symbol->symbology != BARCODE_ULTRA) {
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if ((symbol->output_options & CMYK_COLOUR) == 0) {
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fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
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} else {
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fprintf(feps, "%.2f %.2f %.2f %.2f setcmykcolor\n", cyan_ink, magenta_ink, yellow_ink, black_ink);
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}
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}
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// Rectangles
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if (symbol->symbology == BARCODE_ULTRA) {
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for (colour_index = 0; colour_index <= 8; colour_index++) {
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colour_rect_counter = 0;
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rect = symbol->vector->rectangles;
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while (rect) {
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if (rect->colour == colour_index) {
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if (colour_rect_counter == 0) {
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//Set new colour
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colour_to_pscolor(symbol->output_options, colour_index, ps_color);
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fprintf(feps, "%s\n", ps_color);
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}
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colour_rect_counter++;
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fprintf(feps, "%.2f %.2f TB %.2f %.2f TR\n", rect->height, (symbol->vector->height - rect->y) - rect->height, rect->x, rect->width);
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fprintf(feps, "TE\n");
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}
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rect = rect->next;
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}
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}
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} else {
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rect = symbol->vector->rectangles;
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while (rect) {
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fprintf(feps, "%.2f %.2f TB %.2f %.2f TR\n", rect->height, (symbol->vector->height - rect->y) - rect->height, rect->x, rect->width);
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fprintf(feps, "TE\n");
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rect = rect->next;
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}
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}
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// Hexagons
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previous_diameter = radius = half_radius = half_sqrt3_radius = 0.0f;
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hex = symbol->vector->hexagons;
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while (hex) {
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if (previous_diameter != hex->diameter) {
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previous_diameter = hex->diameter;
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radius = (float) (0.5 * previous_diameter);
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half_radius = (float) (0.25 * previous_diameter);
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half_sqrt3_radius = (float) (0.43301270189221932338 * previous_diameter);
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}
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if ((hex->rotation == 0) || (hex->rotation == 180)) {
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ay = (symbol->vector->height - hex->y) + radius;
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by = (symbol->vector->height - hex->y) + half_radius;
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cy = (symbol->vector->height - hex->y) - half_radius;
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dy = (symbol->vector->height - hex->y) - radius;
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ey = (symbol->vector->height - hex->y) - half_radius;
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fy = (symbol->vector->height - hex->y) + half_radius;
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ax = hex->x;
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bx = hex->x + half_sqrt3_radius;
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cx = hex->x + half_sqrt3_radius;
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dx = hex->x;
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ex = hex->x - half_sqrt3_radius;
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fx = hex->x - half_sqrt3_radius;
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} else {
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ay = (symbol->vector->height - hex->y);
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by = (symbol->vector->height - hex->y) + half_sqrt3_radius;
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cy = (symbol->vector->height - hex->y) + half_sqrt3_radius;
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dy = (symbol->vector->height - hex->y);
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ey = (symbol->vector->height - hex->y) - half_sqrt3_radius;
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fy = (symbol->vector->height - hex->y) - half_sqrt3_radius;
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ax = hex->x - radius;
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bx = hex->x - half_radius;
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cx = hex->x + half_radius;
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dx = hex->x + radius;
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ex = hex->x + half_radius;
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fx = hex->x - half_radius;
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}
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fprintf(feps, "%.2f %.2f %.2f %.2f %.2f %.2f %.2f %.2f %.2f %.2f %.2f %.2f TH\n", ax, ay, bx, by, cx, cy, dx, dy, ex, ey, fx, fy);
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hex = hex->next;
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}
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// Circles
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previous_diameter = radius = 0.0f;
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circle = symbol->vector->circles;
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while (circle) {
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if (previous_diameter != circle->diameter) {
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previous_diameter = circle->diameter;
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radius = (float) (0.5 * previous_diameter);
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}
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if (circle->colour) {
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// A 'white' circle
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if ((symbol->output_options & CMYK_COLOUR) == 0) {
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fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_paper, green_paper, blue_paper);
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} else {
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fprintf(feps, "%.2f %.2f %.2f %.2f setcmykcolor\n", cyan_paper, magenta_paper, yellow_paper, black_paper);
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}
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fprintf(feps, "%.2f %.2f %.2f TD\n", circle->x, (symbol->vector->height - circle->y), radius);
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if (circle->next) {
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if ((symbol->output_options & CMYK_COLOUR) == 0) {
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fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
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} else {
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fprintf(feps, "%.2f %.2f %.2f %.2f setcmykcolor\n", cyan_ink, magenta_ink, yellow_ink, black_ink);
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}
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}
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} else {
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// A 'black' circle
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fprintf(feps, "%.2f %.2f %.2f TD\n", circle->x, (symbol->vector->height - circle->y), radius);
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}
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circle = circle->next;
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}
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// Text
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string = symbol->vector->strings;
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if (string) {
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if ((symbol->output_options & BOLD_TEXT) && (!is_extendable(symbol->symbology) || (symbol->output_options & SMALL_TEXT))) {
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font = "Helvetica-Bold";
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} else {
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font = "Helvetica";
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}
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if (iso_latin1) { /* Change encoding to ISO 8859-1, see Postscript Language Reference Manual 2nd Edition Example 5.6 */
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fprintf(feps, "/%s findfont\n", font);
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fprintf(feps, "dup length dict begin\n");
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fprintf(feps, "{1 index /FID ne {def} {pop pop} ifelse} forall\n");
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fprintf(feps, "/Encoding ISOLatin1Encoding def\n");
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fprintf(feps, "currentdict\n");
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fprintf(feps, "end\n");
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fprintf(feps, "/Helvetica-ISOLatin1 exch definefont pop\n");
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font = "Helvetica-ISOLatin1";
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}
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}
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while (string) {
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ps_convert(string->text, ps_string);
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fprintf(feps, "matrix currentmatrix\n");
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fprintf(feps, "/%s findfont\n", font);
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fprintf(feps, "%.2f scalefont setfont\n", string->fsize);
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fprintf(feps, " 0 0 moveto %.2f %.2f translate 0.00 rotate 0 0 moveto\n", string->x, (symbol->vector->height - string->y));
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if (string->halign == 0 || string->halign == 2) { /* Need width for middle or right align */
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fprintf(feps, " (%s) stringwidth\n", ps_string);
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}
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if (string->rotation != 0) {
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fprintf(feps, "gsave\n");
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fprintf(feps, "%d rotate\n", 360 - string->rotation);
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}
|
|
if (string->halign == 0 || string->halign == 2) {
|
|
fprintf(feps, "pop\n");
|
|
fprintf(feps, "%s 0 rmoveto\n", string->halign == 2 ? "neg" : "-2 div");
|
|
}
|
|
fprintf(feps, " (%s) show\n", ps_string);
|
|
if (string->rotation != 0) {
|
|
fprintf(feps, "grestore\n");
|
|
}
|
|
fprintf(feps, "setmatrix\n");
|
|
string = string->next;
|
|
}
|
|
|
|
//fprintf(feps, "\nshowpage\n");
|
|
|
|
if (symbol->output_options & BARCODE_STDOUT) {
|
|
fflush(feps);
|
|
} else {
|
|
fclose(feps);
|
|
}
|
|
|
|
if (locale)
|
|
setlocale(LC_ALL, locale);
|
|
|
|
return error_number;
|
|
}
|