/*
 * fig.c - Generate FIG output for Eeschema items
 *
 * Written 2016 by Werner Almesberger
 * Copyright 2016 by Werner Almesberger
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */


#include <stdlib.h>
#include <stdio.h>
#include <math.h>

#include "style.h"
#include "text.h"
#include "fig.h"


/*
 * FIG works with 1/1200 in
 * KiCad works with mil
 * 1 point = 1/72 in
 */


static inline int cx(int x)
{
	return x * 1200 / 1000;
}


static inline int cy(int y)
{
	return y * 1200 / 1000;
}


static inline float pt(int x)
{
	return cx(x) * 72 * 1.5 / 1200.0;
}


/* ----- Library items ----------------------------------------------------- */


void fig_rect(int sx, int sy, int ex, int ey)
{
	//	Type  Thick    Depth    StyleV  Rad
	//	  SubTy  Color    Pen       Join   FwdAr
	//	    Style   FillCol  AreaFil  Cap    BwdAr
	printf("2 2 0 %d %d 7  %d -1 -1 0.0 1 1 -1 0 0 5\n",
	    WIDTH_COMP_DWG, COLOR_COMP_DWG, LAYER_COMP_DWG);
	printf("\t%d %d %d %d %d %d %d %d %d %d\n",
	    cx(sx), cy(sy), cx(ex), cy(sy), cx(ex), cy(ey), cx(sx), cy(ey),
	    cx(sx), cy(sy));
}


void fig_poly(int points, int x[points], int y[points],
    unsigned color, unsigned layer)
{
	int i;
	char ch = '\t';

	//	Type  Thick    Depth    StyleV  Rad
	//	  SubTy  Color    Pen       Join   FwdAr
	//	    Style   FillCol  AreaFil  Cap    BwdAr
	printf("2 1 0 %d %d 7  %d -1 -1 0.0 1 1 -1 0 0 %d\n",
	    WIDTH_COMP_DWG, color, layer, points);
	for (i = 0; i != points; i++) {
		printf("%c%d %d", ch, cx(x[i]), cy(y[i]));
		ch = ' ';
	}
	printf("\n");
}


/* ----- Schematics items -------------------------------------------------- */


void fig_glabel(int x, int y, const char *s, int dir, int dim,
    enum fig_shape shape)
{
	struct text txt = {
		.s = s,
		.size = dim,
		.x = x,
		.y = y,
		.rot = 0,
		.hor = 0,
		.vert = text_mid,
	};
	int n = 6;
	int vx[5];
	int vy[5];
	int half = (dim >> 1) + GLABEL_OFFSET;

	switch (dir) {
	case 0:
		txt.rot = 0;
		txt.hor = text_max;
		break;
	default:
		abort();
	}

	switch (shape) {
	case fig_in:
		text_shift(&txt, txt.hor, text_mid, -GLABEL_OFFSET - half, 0);
		text_rel(&txt, text_min, text_min,
		    -GLABEL_OFFSET, GLABEL_OFFSET, vx + 1, vy + 1);
		text_rel(&txt, text_max, text_min,
		    GLABEL_OFFSET, GLABEL_OFFSET, vx + 2, vy + 2);
		text_rel(&txt, text_max, text_mid, GLABEL_OFFSET + half, 0,
		    vx + 3, vy + 3);
		text_rel(&txt, text_max, text_max,
		    GLABEL_OFFSET, -GLABEL_OFFSET, vx + 4, vy + 4);
		text_rel(&txt, text_min, text_max,
		    -GLABEL_OFFSET, -GLABEL_OFFSET, vx + 5, vy + 5);
		break;
	case fig_out:
		text_shift(&txt, txt.hor, text_mid, -GLABEL_OFFSET, 0);
		text_rel(&txt, text_min, text_min,
		    -GLABEL_OFFSET, GLABEL_OFFSET, vx + 1, vy + 1);
		text_rel(&txt, text_max, text_min,
		    GLABEL_OFFSET, GLABEL_OFFSET, vx + 2, vy + 2);
		text_rel(&txt, text_max, text_max,
		    GLABEL_OFFSET, -GLABEL_OFFSET, vx + 3, vy + 3);
		text_rel(&txt, text_min, text_max,
		    -GLABEL_OFFSET, -GLABEL_OFFSET, vx + 4, vy + 4);
		text_rel(&txt, text_min, text_mid, -GLABEL_OFFSET- half, 0,
		    vx + 5, vy + 5);
		break;
	default:
		abort();
	}

	text_fig(&txt, COLOR_GLABEL, LAYER_GLABEL);

	vx[0] = vx[n - 1];
	vy[0] = vy[n - 1];
	fig_poly(n, vx, vy, COLOR_GLABEL, LAYER_GLABEL);
}


void fig_junction(int x, int y)
{
	//	Type  Thick   Depth    StyleV    Cx    Rx    Sx    Ex
	//	  SubTy Color    Pen       Dir      Cy    Ry    Sy    Ey
	//	    Style  FillCol  AreaFil  Angle      
	printf("1 3 0 0 -1 %d %d -1 20 0.0 1 0.0 %d %d %d %d %d %d %d %d\n",
	    COLOR_WIRE, LAYER_WIRES, cx(x), cy(y), JUNCTION_R, JUNCTION_R,
	    cx(x), cy(y), cx(x) + JUNCTION_R, cy(y));
}


void fig_wire(int sx, int sy, int ex, int ey)
{
	//	TypeStyle   FillCol AreaFil  Cap  FwdAr
	//	  SubTy  Color   Pen   StyleV  Rad  BwdAr
	//	      Thick  Depth        Join       Points
	printf("2 1 0 %d %d 7 %d -1 -1 0.0 1 1 -1 0 0 2\n",
	    WIDTH_WIRE, COLOR_WIRE, LAYER_WIRES);
	printf("\t%d %d %d %d\n", cx(sx), cy(sy), cx(ex), cy(ey));
}


void fig_line(int sx, int sy, int ex, int ey)
{
	//	TypeStyle   FillCol AreaFil  Cap  FwdAr
	//	  SubTy  Color   Pen   StyleV  Rad  BwdAr
	//	      Thick  Depth        Join       Points
	printf("2 1 2 %d %d 7 %d -1 -1 3.0 1 1 -1 0 0 2\n",
	    WIDTH_LINE, COLOR_SHEET_DWG, LAYER_LINES);
	printf("\t%d %d %d %d\n", cx(sx), cy(sy), cx(ex), cy(ey));
}


/* ----- General items ----------------------------------------------------- */


void fig_text(int x, int y, const char *s, unsigned size,
    enum text_align align, int rot, unsigned color, unsigned layer)
{
	//	Type   Depth    FontSiz Height
	//	  Just    Pen      Angle    Length
	//	    Color    Font     Flags     X  Y
	printf("4 %u %d %d -1 %d %f %f 4 0.0 0.0 %d %d %s\\001\n",
	    align, color, layer, FONT_HELVETICA_BOLD,
	    pt(size), rot / 180.0 * M_PI, cx(x), cy(y), s);
}


/* ----- FIG file header --------------------------------------------------- */


void fig_init(void)
{
	printf("#FIG 3.2\n");
	printf("Landscape\n");
	printf("Center\n");
	printf("Metric\n");
	printf("A4\n");
	printf("100.00\n");
	printf("Single\n");
	printf("-2\n");
	printf("1200 2\n");
}