Library to create PostScript files Git

#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <libps/pslib.h>
#ifdef MEMORY_DEBUGGING
#include <libps/pslib-mp.h>
#endif

#define LEFT_BORDER 50

struct spotcolor {
	int id;
	char *name;
	char *colorspace;
	float c1;
	float c2;
	float c3;
	float c4;
};

void errorhandler(PSDoc *p, int error, const char *str, void *data) {
	fprintf(stderr, "PSLib: %s\n", str);
}

size_t writeproc(PSDoc *p, void *data, size_t size) {
	return fwrite(data, 1, size, stdout);
}

void footer(PSDoc *p, const char *text) {
	int psfont;
	char buffer[100];
	psfont = PS_findfont(p, "Helvetica", "", 0);
	PS_setfont(p, psfont, 8.0);
	sprintf(buffer, "This file has been created with pslib %s", PS_get_parameter(p, "dottedversion", 0.0));
	PS_show_xy(p, buffer, LEFT_BORDER, 25);
}

int colorline(PSDoc *ps, float leftborder, struct spotcolor *spot) {
	int i;
	int psfont;
	char buffer[100];
	for(i=1; i<=10; i++) {
		PS_setcolor(ps, "fill", "spot", (float) spot->id, i*0.1, 0.0, 0.0);
		PS_rect(ps, leftborder, 35+i*65, 50, 50);
		PS_fill(ps);
	}
	PS_setcolor(ps, "stroke", "gray", 0.0, 0.0, 0.0, 0.0);
	psfont = PS_findfont(ps, "Helvetica", "", 0);
	PS_setfont(ps, psfont, 7.0);
	PS_show_xy(ps, spot->name, leftborder, 100+10*65+13);
	if(!strcmp(spot->colorspace, "cmyk")) {
		sprintf(buffer, "%.2f, %.2f, %.2f, %.2f", spot->c1, spot->c2, spot->c3, spot->c4);
		PS_show_xy(ps, buffer, leftborder, 100+10*65+3);
	} else if(!strcmp(spot->colorspace, "rgb")) {
		sprintf(buffer, "%.2f, %.2f, %.2f", spot->c1, spot->c2, spot->c3);
		PS_show_xy(ps, buffer, leftborder, 100+10*65+3);
	}
	return(spot->id);
}

int main() {
	PSDoc *ps;
	int i;
	struct spotcolor spotcolors[5] = {
		{0, "PANTONE Violet C", "cmyk", 0.75, 0.94, 0.0, 0.0},
		{0, "PANTONE 114 C", "cmyk", 0.0, 0.11, 0.69, 0.0},
		{0, "PANTONE 5565 C", "cmyk", 0.37, 0.0, 0.34, 0.34},
		{0, "RGB Blue", "rgb", 0.0, 0.0, 1.0, 0.0},
		{0, "Gray Black", "gray", 0.0, 0.0, 0.0, 0.0}};
	int psfont;

	PS_boot();
#ifdef MEMORY_DEBUGGING
	PS_mp_init();
#endif

#ifdef MEMORY_DEBUGGING
	ps = PS_new2(errorhandler, PS_mp_malloc, PS_mp_realloc, PS_mp_free, NULL);
#else
	ps = PS_new();
#endif

	if (0 > PS_open_file(ps, "spotcolor.ps")) {
//	if (0 > PS_open_mem(ps, writeproc)) {
		printf("Cannot open PostScript file\n");
		exit(1);
	}

	PS_set_parameter(ps, "warning", "true");

	PS_set_info(ps, "Creator", __FILE__);
	PS_set_info(ps, "Author", "Uwe Steinmann");
	PS_set_info(ps, "Title", "Spotcolor demonstration");
	PS_set_info(ps, "Keywords", "Spot color");

	for(i=0; i<5; i++) {
		PS_setcolor(ps, "fill", spotcolors[i].colorspace, spotcolors[i].c1, spotcolors[i].c2, spotcolors[i].c3, spotcolors[i].c4);
		spotcolors[i].id = PS_makespotcolor(ps, spotcolors[i].name, 0);
	}

	PS_begin_page(ps, 596, 842);
	footer(ps, "");

	psfont = PS_findfont(ps, "Helvetica", "", 0);
	PS_setfont(ps, psfont, 7.0);
	for(i=1; i<=10; i++) {
		char buffer[10];
		sprintf(buffer, "%d %%", i*10);
		PS_show_xy(ps, buffer, 60, 55+i*65);
	}

	colorline(ps, 100.0, &spotcolors[0]);
	colorline(ps, 190.0, &spotcolors[1]);
	colorline(ps, 280.0, &spotcolors[2]);
	colorline(ps, 370.0, &spotcolors[3]);
	colorline(ps, 460.0, &spotcolors[4]);

	PS_end_page(ps);

	PS_close(ps);
	PS_delete(ps);

#ifdef MEMORY_DEBUGGING 
	PS_mp_list_unfreed();
#endif  
	PS_shutdown();

	exit(0);
}