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eda-tools/eeshow/kicad/dwg.c

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/*
* kicad/dwg.c - Complex drawing functions for KiCad 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.
*/
#define _GNU_SOURCE /* for asprintf */
#include <stdbool.h>
#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
#include "misc/util.h"
#include "gfx/misc.h"
#include "gfx/style.h"
#include "gfx/text.h"
#include "gfx/gfx.h"
#include "kicad/dwg.h"
/* ----- Helper functions -------------------------------------------------- */
static void bbox_from_poly(struct dwg_bbox *bbox, unsigned n,
const int *vx, const int *vy)
{
unsigned i;
int xmax, ymax;
bbox->x = xmax = *vx;
bbox->y = ymax = *vy;
for (i = 1; i != n; i++) {
if (vx[i] < bbox->x)
bbox->x = vx[i];
if (vy[i] < bbox->y)
bbox->y = vy[i];
if (vx[i] > xmax)
xmax = vx[i];
if (vy[i] > ymax)
ymax = vy[i];
}
bbox->w = xmax - bbox->x + 1;
bbox->h = ymax - bbox->y + 1;
}
/* ----- Labels ------------------------------------------------------------ */
enum box_type { // ___
box_simple, // [___]
box_left, // <___]
box_right, // [___>
box_both, // <___>
};
static enum box_type flip_box(enum box_type box)
{
switch (box) {
case box_simple:
return box_simple;
case box_left:
return box_right;
case box_right:
return box_left;
case box_both:
return box_both;
default:
abort();
}
}
void dwg_label(int x, int y, const char *s, int dir, int dim,
enum dwg_shape shape, struct dwg_bbox *bbox)
{
struct text txt = {
.s = s,
.size = dim,
.x = x,
.y = y,
.rot = 0,
.hor = 0,
.vert = text_min,
};
int dx = 0, dy = 0;
switch (dir) {
case 0: /* right */
txt.rot = 0;
txt.hor = text_min;
dy = 1;
break;
case 1: /* up */
txt.rot = 90;
txt.hor = text_min;
dx = -1;
break;
case 2: /* left */
txt.rot = 0;
txt.hor = text_max;
dy = 1;
break;
case 3: /* down */
txt.rot = 90;
txt.hor = text_max;
dx = -1;
break;
default:
assert(0);
}
txt.y -= dy * LABEL_OFFSET;
txt.x += dx * LABEL_OFFSET;
text_fig(&txt, COLOR_LABEL, LAYER_LABEL);
}
void dwg_glabel(int x, int y, const char *s, int dir, int dim,
enum dwg_shape shape, struct dwg_bbox *bbox)
{
struct text txt = {
.s = s,
.size = dim,
.x = x,
.y = y,
.rot = 0,
.hor = 0,
.vert = text_mid,
};
int n = 6;
int vx[7];
int vy[7];
int half = (dim >> 1) + GLABEL_OFFSET;
enum box_type box;
int dx, shift_flat, shift_tip;
bool anchor_right = 1;
char *tag;
switch (shape) {
case dwg_unspec:
box = box_simple;
break;
case dwg_in:
box = box_right;
break;
case dwg_out:
box = box_left;
break;
case dwg_bidir:
box = box_both;
break;
default:
assert(0);
}
switch (dir) {
case 0: /* left */
txt.rot = 0;
txt.hor = text_max;
dx = -1;
break;
case 1: /* up */
txt.rot = 90;
txt.hor = text_min;
dx = 1;
box = flip_box(box);
anchor_right = !anchor_right;
break;
case 2: /* right */
txt.rot = 0;
txt.hor = text_min;
dx = 1;
box = flip_box(box);
anchor_right = !anchor_right;
break;
case 3: /* down */
txt.rot = 90;
txt.hor = text_max;
dx = -1;
break;
default:
assert(0);
}
shift_flat = dx * GLABEL_OFFSET;
shift_tip = dx * (GLABEL_OFFSET + half);
switch (box) {
case box_simple:
n = 5;
text_shift(&txt, txt.hor, text_mid, shift_flat, 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);
break;
case box_right:
text_shift(&txt, txt.hor, text_mid,
anchor_right ? shift_tip : shift_flat, 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 box_left:
text_shift(&txt, txt.hor, text_mid,
anchor_right ? shift_flat : shift_tip, 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;
case box_both:
n = 7;
text_shift(&txt, txt.hor, text_mid, shift_tip, 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);
text_rel(&txt, text_min, text_mid, -GLABEL_OFFSET- half, 0,
vx + 6, vy + 6);
break;
default:
assert(0);
}
text_fig(&txt, COLOR_GLABEL, LAYER_GLABEL);
vx[0] = vx[n - 1];
vy[0] = vy[n - 1];
gfx_poly(n, vx, vy, COLOR_GLABEL, COLOR_NONE, LAYER_GLABEL);
if (bbox)
bbox_from_poly(bbox, n, vx, vy);
if (asprintf(&tag, "G:%s", s)) {}
gfx_tag(tag, n, vx, vy);
}
static int make_box(enum box_type box, int h, int *vx, int *vy)
{
int r = h / 2;
switch (box) {
case box_simple:
vx[0] = 0;
vy[0] = -r;
vx[1] = 2 * r;
vy[1] = -r;
vx[2] = 2 * r;
vy[2] = r;
vx[3] = 0;
vy[3] = r;
return 4;
case box_right:
vx[0] = 0;
vy[0] = -r;
vx[1] = r;
vy[1] = -r;
vx[2] = 2 * r;
vy[2] = 0;
vx[3] = r;
vy[3] = r;
vx[4] = 0;
vy[4] = r;
return 5;
case box_left:
vx[0] = r;
vy[0] = -r;
vx[1] = 2 * r;
vy[1] = -r;
vx[2] = 2 * r;
vy[2] = r;
vx[3] = r;
vy[3] = r;
vx[4] = 0;
vy[4] = 0;
return 5;
case box_both:
vx[0] = 0;
vy[0] = 0;
vx[1] = r;
vy[1] = -r;
vx[2] = 2 * r;
vy[2] = 0;
vx[3] = r;
vy[3] = r;
return 4;
default:
assert(0);
}
}
void dwg_hlabel(int x, int y, const char *s, int dir, int dim,
enum dwg_shape shape, struct dwg_bbox *bbox)
{
struct text txt = {
.s = s,
.size = dim,
.x = x,
.y = y,
.rot = 0,
.hor = 0,
.vert = text_mid,
};
int vx[6], vy[6];
int rot;
int n, i;
switch (shape) {
case dwg_unspec:
n = make_box(box_simple, dim, vx, vy);
break;
case dwg_in:
n = make_box(box_left, dim, vx, vy);
break;
case dwg_out:
n = make_box(box_right, dim, vx, vy);
break;
case dwg_tri:
case dwg_bidir:
n = make_box(box_both, dim, vx, vy);
break;
default:
assert(0);
}
switch (dir) {
case 0: /* right */
rot = 180;
txt.hor = text_max;
break;
case 1: /* up */
rot = 90;
txt.hor = text_min;
break;
case 2: /* left */
rot = 0;
txt.hor = text_min;
break;
case 3: /* down */
rot = 270;
txt.hor = text_max;
break;
default:
assert(0);
}
txt.x += rx((1 + HLABEL_OFFSET_F) * dim, 0, rot);
txt.y += ry((1 + HLABEL_OFFSET_F) * dim, 0, rot);
for (i = 0; i != n; i++) {
int tmp;
tmp = x + rx(vx[i], vy[i], rot);
vy[i] = y + ry(vx[i], vy[i], rot);
vx[i] = tmp;
}
vx[n] = vx[0];
vy[n] = vy[0];
txt.rot = rot % 180;
text_fig(&txt, COLOR_HLABEL, LAYER_HLABEL);
gfx_poly(n + 1, vx, vy, COLOR_HLABEL, COLOR_NONE, LAYER_HLABEL);
}
/* ----- Text -------------------------------------------------------------- */
void dwg_text(int x, int y, const char *s, int dir, int dim,
enum dwg_shape shape, struct dwg_bbox *bbox)
{
struct text txt = {
.s = s,
.size = dim,
.x = x,
.y = y,
.rot = 0,
.hor = text_min,
.vert = text_min,
};
switch (dir) {
case 0: /* right */
break;
case 1: /* up */
text_rot(&txt, 90);
break;
case 2: /* left */
txt.hor = text_max;
break;
case 3: /* down */
text_rot(&txt, 90);
txt.hor = text_max;
break;
default:
assert(2 + 2 == 5);
}
text_fig(&txt, COLOR_TEXT, LAYER_TEXT);
}
/* ----- Connections ------------------------------------------------------- */
void dwg_junction(int x, int y)
{
gfx_circ(x, y, JUNCTION_R, COLOR_NONE, COLOR_WIRE, LAYER_WIRES);
}
void dwg_noconn(int x, int y)
{
int vx[2] = { x - NOCONN_LEN, x + NOCONN_LEN };
int vy[2] = { y - NOCONN_LEN, y + NOCONN_LEN };
gfx_poly(2, vx, vy, COLOR_NOCONN, COLOR_NONE, LAYER_NOCONN);
swap(vy[0], vy[1]);
gfx_poly(2, vx, vy, COLOR_NOCONN, COLOR_NONE, LAYER_NOCONN);
}
/* ----- Lines ------------------------------------------------------------- */
/*
* We can't use gfx_poly because lines are dashed and we don't have that
* property at the gfx_poly API.
*
* Since dashing may produce different results between going from A to B and
* going from B to A, we enforce a common direction, so that pixel diffs will
* treat reversed lines as still equal.
*/
void dwg_line(int sx, int sy, int ex, int ey)
{
if (sx < ex || (sx == ex && sy < ey))
gfx_line(sx, sy, ex, ey, COLOR_SHEET_DWG, LAYER_LINES);
else
gfx_line(ex, ey, sx, sy, COLOR_SHEET_DWG, LAYER_LINES);
}
/* ----- Wires and busses -------------------------------------------------- */
void dwg_wire(int sx, int sy, int ex, int ey)
{
int vx[] = { sx, ex };
int vy[] = { sy, ey };
// WIDTH_WIRE
gfx_poly(2, vx, vy, COLOR_WIRE, COLOR_NONE, LAYER_WIRES);
}
void dwg_bus(int sx, int sy, int ex, int ey)
{
int vx[] = { sx, ex };
int vy[] = { sy, ey };
// WIDTH_BUS
gfx_poly(2, vx, vy, COLOR_BUS, COLOR_NONE, LAYER_BUSSES);
}
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