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Add CMYK colourspace option for EPS

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Requested by Joe Bedard
Ref #22
This commit is contained in:
Robin Stuart 2016-06-19 14:14:30 +01:00
parent e0240c8e2e
commit 507071cf9c
3 changed files with 145 additions and 20 deletions
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157
backend/ps.c
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@ -45,6 +45,8 @@ int ps_plot(struct zint_symbol *symbol) {
FILE *feps;
int fgred, fggrn, fgblu, bgred, bggrn, bgblu;
float red_ink, green_ink, blue_ink, red_paper, green_paper, blue_paper;
float cyan_ink, magenta_ink, yellow_ink, black_ink;
float cyan_paper, magenta_paper, yellow_paper, black_paper;
int error_number = 0;
int textoffset, xoffset, yoffset, textdone, main_width;
char textpart[10], addon[6];
@ -143,6 +145,53 @@ int ps_plot(struct zint_symbol *symbol) {
red_paper = bgred / 256.0;
green_paper = bggrn / 256.0;
blue_paper = bgblu / 256.0;
/* Convert RGB to CMYK */
if (red_ink > green_ink) {
if (blue_ink > red_ink) {
black_ink = 1 - blue_ink;
} else {
black_ink = 1 - red_ink;
}
} else {
if (blue_ink > red_ink) {
black_ink = 1 - blue_ink;
} else {
black_ink = 1 - green_ink;
}
}
if (black_ink < 1.0) {
cyan_ink = (1 - red_ink - black_ink) / (1 - black_ink);
magenta_ink = (1 - green_ink - black_ink) / (1 - black_ink);
yellow_ink = (1 - blue_ink - black_ink) / (1 - black_ink);
} else {
cyan_ink = 0.0;
magenta_ink = 0.0;
yellow_ink = 0.0;
}
if (red_paper > green_paper) {
if (blue_paper > red_paper) {
black_paper = 1 - blue_paper;
} else {
black_paper = 1 - red_paper;
}
} else {
if (blue_paper > red_paper) {
black_paper = 1 - blue_paper;
} else {
black_paper = 1 - green_paper;
}
}
if (black_paper < 1.0) {
cyan_paper = (1 - red_paper - black_paper) / (1 - black_paper);
magenta_paper = (1 - green_paper - black_paper) / (1 - black_paper);
yellow_paper = (1 - blue_paper - black_paper) / (1 - black_paper);
} else {
cyan_paper = 0.0;
magenta_paper = 0.0;
yellow_paper = 0.0;
}
if (symbol->height == 0) {
symbol->height = 50;
@ -248,8 +297,13 @@ int ps_plot(struct zint_symbol *symbol) {
fprintf(feps, "newpath\n");
/* Now the actual representation */
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_paper, green_paper, blue_paper);
if ((symbol->output_options & CMYK_COLOUR) == 0) {
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_paper, green_paper, blue_paper);
} else {
fprintf(feps, "%.2f %.2f %.2f %.2f setcmykcolor\n", cyan_ink, magenta_ink, yellow_ink, black_ink);
fprintf(feps, "%.2f %.2f %.2f %.2f setcmykcolor\n", cyan_paper, magenta_paper, yellow_paper, black_paper);
}
fprintf(feps, "%.2f 0.00 TB 0.00 %.2f TR\n", (symbol->height + textoffset + yoffset + yoffset) * scaler, (symbol->width + xoffset + xoffset) * scaler);
if (((symbol->output_options & BARCODE_BOX) != 0) || ((symbol->output_options & BARCODE_BIND) != 0)) {
@ -266,21 +320,34 @@ int ps_plot(struct zint_symbol *symbol) {
textoffset = 0.0;
if (((symbol->output_options & BARCODE_BOX) != 0) || ((symbol->output_options & BARCODE_BIND) != 0)) {
fprintf(feps, "TE\n");
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
if ((symbol->output_options & CMYK_COLOUR) == 0) {
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
} else {
fprintf(feps, "%.2f %.2f %.2f %.2f setcmykcolor\n", cyan_ink, magenta_ink, yellow_ink, black_ink);
}
fprintf(feps, "%.2f %.2f TB %.2f %.2f TR\n", symbol->border_width * scaler, textoffset * scaler, 0.0, (74.0 + xoffset + xoffset) * scaler);
fprintf(feps, "%.2f %.2f TB %.2f %.2f TR\n", symbol->border_width * scaler, (textoffset + 72.0 + symbol->border_width) * scaler, 0.0, (74.0 + xoffset + xoffset) * scaler);
}
if ((symbol->output_options & BARCODE_BOX) != 0) {
/* side bars */
fprintf(feps, "TE\n");
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
if ((symbol->output_options & CMYK_COLOUR) == 0) {
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
} else {
fprintf(feps, "%.2f %.2f %.2f %.2f setcmykcolor\n", cyan_ink, magenta_ink, yellow_ink, black_ink);
}
fprintf(feps, "%.2f %.2f TB %.2f %.2f TR\n", (72.0 + (2 * symbol->border_width)) * scaler, textoffset * scaler, 0.0, symbol->border_width * scaler);
fprintf(feps, "%.2f %.2f TB %.2f %.2f TR\n", (72.0 + (2 * symbol->border_width)) * scaler, textoffset * scaler, (74.0 + xoffset + xoffset - symbol->border_width) * scaler, symbol->border_width * scaler);
}
fprintf(feps, "TE\n");
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
if ((symbol->output_options & CMYK_COLOUR) == 0) {
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
} else {
fprintf(feps, "%.2f %.2f %.2f %.2f setcmykcolor\n", cyan_ink, magenta_ink, yellow_ink, black_ink);
fprintf(feps, "%.2f %.2f %.2f %.2f setcmykcolor\n", cyan_ink, magenta_ink, yellow_ink, black_ink);
}
fprintf(feps, "%.2f %.2f %.2f %.2f %.2f %.2f %.2f %.2f TC\n", (35.76 + xoffset) * scaler, (35.60 + yoffset) * scaler, 10.85 * scaler, (35.76 + xoffset) * scaler, (35.60 + yoffset) * scaler, 8.97 * scaler, (44.73 + xoffset) * scaler, (35.60 + yoffset) * scaler);
fprintf(feps, "%.2f %.2f %.2f %.2f %.2f %.2f %.2f %.2f TC\n", (35.76 + xoffset) * scaler, (35.60 + yoffset) * scaler, 7.10 * scaler, (35.76 + xoffset) * scaler, (35.60 + yoffset) * scaler, 5.22 * scaler, (40.98 + xoffset) * scaler, (35.60 + yoffset) * scaler);
fprintf(feps, "%.2f %.2f %.2f %.2f %.2f %.2f %.2f %.2f TC\n", (35.76 + xoffset) * scaler, (35.60 + yoffset) * scaler, 3.31 * scaler, (35.76 + xoffset) * scaler, (35.60 + yoffset) * scaler, 1.43 * scaler, (37.19 + xoffset) * scaler, (35.60 + yoffset) * scaler);
@ -333,7 +400,11 @@ int ps_plot(struct zint_symbol *symbol) {
row_posn += (textoffset + yoffset);
fprintf(feps, "TE\n");
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
if ((symbol->output_options & CMYK_COLOUR) == 0) {
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
} else {
fprintf(feps, "%.2f %.2f %.2f %.2f setcmykcolor\n", cyan_ink, magenta_ink, yellow_ink, black_ink);
}
fprintf(feps, "%.2f %.2f ", row_height * scaler, row_posn * scaler);
i = 0;
if (module_is_set(symbol, this_row, 0)) {
@ -349,7 +420,11 @@ int ps_plot(struct zint_symbol *symbol) {
} while (module_is_set(symbol, this_row, i + block_width) == module_is_set(symbol, this_row, i));
if ((addon_latch == 0) && (r == 0) && (i > main_width)) {
fprintf(feps, "TE\n");
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
if ((symbol->output_options & CMYK_COLOUR) == 0) {
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
} else {
fprintf(feps, "%.2f %.2f %.2f %.2f setcmykcolor\n", cyan_ink, magenta_ink, yellow_ink, black_ink);
}
fprintf(feps, "%.2f %.2f ", (row_height - 5.0) * scaler, (row_posn - 5.0) * scaler);
addon_text_posn = row_posn + row_height - 8.0;
addon_latch = 1;
@ -379,7 +454,11 @@ int ps_plot(struct zint_symbol *symbol) {
case 11:
case 14:
fprintf(feps, "TE\n");
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
if ((symbol->output_options & CMYK_COLOUR) == 0) {
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
} else {
fprintf(feps, "%.2f %.2f %.2f %.2f setcmykcolor\n", cyan_ink, magenta_ink, yellow_ink, black_ink);
}
fprintf(feps, "%.2f %.2f ", 5.0 * scaler, (4.0 + yoffset) * scaler);
fprintf(feps, "TB %.2f %.2f TR\n", (0 + xoffset) * scaler, 1 * scaler);
fprintf(feps, "TB %.2f %.2f TR\n", (2 + xoffset) * scaler, 1 * scaler);
@ -392,7 +471,11 @@ int ps_plot(struct zint_symbol *symbol) {
}
textpart[4] = '\0';
fprintf(feps, "TE\n");
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
if ((symbol->output_options & CMYK_COLOUR) == 0) {
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
} else {
fprintf(feps, "%.2f %.2f %.2f %.2f setcmykcolor\n", cyan_ink, magenta_ink, yellow_ink, black_ink);
}
fprintf(feps, "matrix currentmatrix\n");
fprintf(feps, "/Helvetica findfont\n");
fprintf(feps, "%.2f scalefont setfont\n", 11.0 * scaler);
@ -450,7 +533,11 @@ int ps_plot(struct zint_symbol *symbol) {
case 16:
case 19:
fprintf(feps, "TE\n");
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
if ((symbol->output_options & CMYK_COLOUR) == 0) {
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
} else {
fprintf(feps, "%.2f %.2f %.2f %.2f setcmykcolor\n", cyan_ink, magenta_ink, yellow_ink, black_ink);
}
fprintf(feps, "%.2f %.2f ", 5.0 * scaler, (4.0 + yoffset) * scaler);
fprintf(feps, "TB %.2f %.2f TR\n", (0 + xoffset) * scaler, 1 * scaler);
fprintf(feps, "TB %.2f %.2f TR\n", (2 + xoffset) * scaler, 1 * scaler);
@ -461,7 +548,11 @@ int ps_plot(struct zint_symbol *symbol) {
textpart[0] = local_text[0];
textpart[1] = '\0';
fprintf(feps, "TE\n");
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
if ((symbol->output_options & CMYK_COLOUR) == 0) {
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
} else {
fprintf(feps, "%.2f %.2f %.2f %.2f setcmykcolor\n", cyan_ink, magenta_ink, yellow_ink, black_ink);
}
fprintf(feps, "matrix currentmatrix\n");
fprintf(feps, "/Helvetica findfont\n");
fprintf(feps, "%.2f scalefont setfont\n", 11.0 * scaler);
@ -535,7 +626,11 @@ int ps_plot(struct zint_symbol *symbol) {
if (((symbol->symbology == BARCODE_UPCA) && (symbol->rows == 1)) || (symbol->symbology == BARCODE_UPCA_CC)) {
/* guard bar extensions and text formatting for UPCA */
fprintf(feps, "TE\n");
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
if ((symbol->output_options & CMYK_COLOUR) == 0) {
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
} else {
fprintf(feps, "%.2f %.2f %.2f %.2f setcmykcolor\n", cyan_ink, magenta_ink, yellow_ink, black_ink);
}
fprintf(feps, "%.2f %.2f ", 5.0 * scaler, (4.0 + yoffset) * scaler);
latch = 1;
@ -577,7 +672,11 @@ int ps_plot(struct zint_symbol *symbol) {
textpart[0] = local_text[0];
textpart[1] = '\0';
fprintf(feps, "TE\n");
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
if ((symbol->output_options & CMYK_COLOUR) == 0) {
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
} else {
fprintf(feps, "%.2f %.2f %.2f %.2f setcmykcolor\n", cyan_ink, magenta_ink, yellow_ink, black_ink);
}
fprintf(feps, "matrix currentmatrix\n");
fprintf(feps, "/Helvetica findfont\n");
fprintf(feps, "%.2f scalefont setfont\n", 8.0 * scaler);
@ -661,7 +760,11 @@ int ps_plot(struct zint_symbol *symbol) {
if (((symbol->symbology == BARCODE_UPCE) && (symbol->rows == 1)) || (symbol->symbology == BARCODE_UPCE_CC)) {
/* guard bar extensions and text formatting for UPCE */
fprintf(feps, "TE\n");
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
if ((symbol->output_options & CMYK_COLOUR) == 0) {
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
} else {
fprintf(feps, "%.2f %.2f %.2f %.2f setcmykcolor\n", cyan_ink, magenta_ink, yellow_ink, black_ink);
}
fprintf(feps, "%.2f %.2f ", 5.0 * scaler, (4.0 + yoffset) * scaler);
fprintf(feps, "TB %.2f %.2f TR\n", (0 + xoffset) * scaler, 1 * scaler);
fprintf(feps, "TB %.2f %.2f TR\n", (2 + xoffset) * scaler, 1 * scaler);
@ -749,7 +852,11 @@ int ps_plot(struct zint_symbol *symbol) {
if ((symbol->rows > 1) && (is_stackable(symbol->symbology) == 1)) {
/* row binding */
fprintf(feps, "TE\n");
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
if ((symbol->output_options & CMYK_COLOUR) == 0) {
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
} else {
fprintf(feps, "%.2f %.2f %.2f %.2f setcmykcolor\n", cyan_ink, magenta_ink, yellow_ink, black_ink);
}
for (r = 1; r < symbol->rows; r++) {
fprintf(feps, "%.2f %.2f TB %.2f %.2f TR\n", 2.0 * scaler, ((r * row_height) + textoffset + yoffset - 1) * scaler, xoffset * scaler, symbol->width * scaler);
}
@ -757,14 +864,22 @@ int ps_plot(struct zint_symbol *symbol) {
}
if (((symbol->output_options & BARCODE_BOX) != 0) || ((symbol->output_options & BARCODE_BIND) != 0)) {
fprintf(feps, "TE\n");
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
if ((symbol->output_options & CMYK_COLOUR) == 0) {
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
} else {
fprintf(feps, "%.2f %.2f %.2f %.2f setcmykcolor\n", cyan_ink, magenta_ink, yellow_ink, black_ink);
}
fprintf(feps, "%.2f %.2f TB %.2f %.2f TR\n", symbol->border_width * scaler, textoffset * scaler, 0.0, (symbol->width + xoffset + xoffset) * scaler);
fprintf(feps, "%.2f %.2f TB %.2f %.2f TR\n", symbol->border_width * scaler, (textoffset + symbol->height + symbol->border_width) * scaler, 0.0, (symbol->width + xoffset + xoffset) * scaler);
}
if ((symbol->output_options & BARCODE_BOX) != 0) {
/* side bars */
fprintf(feps, "TE\n");
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
if ((symbol->output_options & CMYK_COLOUR) == 0) {
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
} else {
fprintf(feps, "%.2f %.2f %.2f %.2f setcmykcolor\n", cyan_ink, magenta_ink, yellow_ink, black_ink);
}
fprintf(feps, "%.2f %.2f TB %.2f %.2f TR\n", (symbol->height + (2 * symbol->border_width)) * scaler, textoffset * scaler, 0.0, symbol->border_width * scaler);
fprintf(feps, "%.2f %.2f TB %.2f %.2f TR\n", (symbol->height + (2 * symbol->border_width)) * scaler, textoffset * scaler, (symbol->width + xoffset + xoffset - symbol->border_width) * scaler, symbol->border_width * scaler);
}
@ -774,7 +889,11 @@ int ps_plot(struct zint_symbol *symbol) {
/* Put the human readable text at the bottom */
if (textdone == 0) {
fprintf(feps, "TE\n");
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
if ((symbol->output_options & CMYK_COLOUR) == 0) {
fprintf(feps, "%.2f %.2f %.2f setrgbcolor\n", red_ink, green_ink, blue_ink);
} else {
fprintf(feps, "%.2f %.2f %.2f %.2f setcmykcolor\n", cyan_ink, magenta_ink, yellow_ink, black_ink);
}
fprintf(feps, "matrix currentmatrix\n");
fprintf(feps, "/Helvetica findfont\n");
fprintf(feps, "%.2f scalefont setfont\n", 8.0 * scaler);

3
backend/zint.h
View File

@ -198,7 +198,8 @@ extern "C" {
#define BARCODE_STDOUT 8
#define READER_INIT 16
#define SMALL_TEXT 32
#define BOLD_TEXT 64
#define BOLD_TEXT 64
#define CMYK_COLOUR 128
#define DATA_MODE 0
#define UNICODE_MODE 1

5
frontend/main.c
View File

@ -86,6 +86,7 @@ void usage(void) {
" -r, --reverse Reverse colours (white on black).\n"
" --fg=COLOUR Specify a foreground colour.\n"
" --bg=COLOUR Specify a background colour.\n"
" --cmyk Convert to CMYK colour space for EPS\n"
" --scale=NUMBER Adjust size of output image.\n"
" --directpng Send PNG output to stdout\n"
" --directeps Send EPS output to stdout\n"
@ -415,6 +416,7 @@ int main(int argc, char **argv) {
{"init", 0, 0, 0},
{"smalltext", 0, 0, 0},
{"boldtext", 0, 0, 0},
{"cmyk", 0, 0, 0},
{"batch", 0, 0, 0},
{0, 0, 0, 0}
};
@ -438,6 +440,9 @@ int main(int argc, char **argv) {
if (!strcmp(long_options[option_index].name, "boldtext")) {
my_symbol->output_options += BOLD_TEXT;
}
if (!strcmp(long_options[option_index].name, "cmyk")) {
my_symbol->output_options += CMYK_COLOUR;
}
if (!strcmp(long_options[option_index].name, "directeps")) {
my_symbol->output_options += BARCODE_STDOUT;
strncpy(my_symbol->outfile, "dummy.eps", 10);