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dxf.c
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dxf.c
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/*
Copyright by Oliver Dippel <[email protected]>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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.
On Debian GNU/Linux systems, the complete text of the GNU General
Public License can be found in `/usr/share/common-licenses/GPL'.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <dxf.h>
#include <font.h>
#ifdef __APPLE__
#include <malloc/malloc.h>
#else
#include <malloc.h>
#endif
#include <locale.h>
int block = 0;
double block_x = 0.0;
double block_y = 0.0;
char block_name[1024];
char LayerNames[MAX_OBJECTS][256];
double get_len (double x1, double y1, double x2, double y2);
int mtext_n = 0;
char dxf_options[256][256];
_OBJECT *myOBJECTS = NULL;
_LINE *myLINES = NULL;
char dxf_typename[TYPE_LAST][16];
int line_n = 1;
int line_last = 0;
void add_line (int type, char *layer, double x1, double y1, double x2, double y2, double opt, double cx, double cy) {
// printf("## ADD_LINE (%i %i): %f,%f -> %f,%f (%s / %f)\n", line_n, line_last, x1, y1, x2, y2, layer, opt);
if (x1 > 10000.0 || y1 > 10000.0 || x2 > 10000.0 || y2 > 10000.0) {
printf("###### LINE TO BIG; %f %f -> %f %f ######\n", x1, y1, x2, y2);
return;
}
if (line_n < MAX_LINES) {
int num = 0;
for (num = 0; num < line_last; num++) {
if (strcmp(LayerNames[num], layer) == 0) {
break;
} else if (LayerNames[num][0] == 0) {
strcpy(LayerNames[num], layer);
break;
}
}
if (myLINES == NULL) {
myLINES = (_LINE *)malloc(sizeof(_LINE) * 5);
} else {
myLINES = (_LINE *)realloc((void *)myLINES, sizeof(_LINE) * (line_last + 5));
}
if (strcmp(layer, "holding-tabs") == 0) {
myLINES[line_n].istab = 1;
myLINES[line_n].used = 0;
} else if (block == 1) {
myLINES[line_n].istab = 0;
myLINES[line_n].used = 0;
} else {
myLINES[line_n].istab = 0;
myLINES[line_n].used = 1;
}
myLINES[line_n].type = type;
strcpy(myLINES[line_n].layer, layer);
myLINES[line_n].x1 = x1;
myLINES[line_n].y1 = y1;
myLINES[line_n].x2 = x2;
myLINES[line_n].y2 = y2;
myLINES[line_n].cx = cx;
myLINES[line_n].cy = cy;
myLINES[line_n].opt = opt;
myLINES[line_n].marked = 0;
myLINES[line_n].in_object = -1;
strcpy(myLINES[line_n].block, block_name);
myLINES[line_n].blockdata = block;
line_n++;
myLINES[line_n].used = 0;
myLINES[line_n + 1].used = 0;
myLINES[line_n].type = -1;
myLINES[line_n + 1].type = -1;
line_last = line_n;
} else {
printf("### TO MANY LINES ##\n");
// exit(1);
}
}
size_t trimline (char *out, size_t len, const char *str) {
if(len == 0) {
return 0;
}
const char *end;
size_t out_size;
while (*str == ' ' || *str == '\r' || *str == '\n') {
str++;
}
if (*str == 0) {
*out = 0;
return 1;
}
end = str + strlen(str) - 1;
while(end > str && (*end == ' ' || *end == '\r' || *end == '\n')) {
end--;
}
end++;
out_size = (end - str) < len-1 ? (end - str) : len-1;
memcpy(out, str, out_size);
out[out_size] = 0;
return out_size;
}
void clear_dxfoptions (void) {
int num = 0;
for (num = 0; num < 256; num++) {
dxf_options[num][0] = 0;
}
}
void dxf_read (char *file) {
FILE *fp;
char *line = NULL;
char line2[1024];
size_t len = 0;
ssize_t read;
setlocale(LC_NUMERIC, "C");
line_last = 0;
line_n = 1;
if (myLINES != NULL) {
free(myLINES);
myLINES = NULL;
}
strcpy(dxf_typename[TYPE_NONE], "None");
strcpy(dxf_typename[TYPE_LINE], "Line");
strcpy(dxf_typename[TYPE_ARC], "Arc");
strcpy(dxf_typename[TYPE_CIRCLE], "Circle");
strcpy(dxf_typename[TYPE_MTEXT], "Text");
strcpy(dxf_typename[TYPE_POINT], "Point");
strcpy(dxf_typename[TYPE_POLYLINE], "Polyline");
strcpy(dxf_typename[TYPE_VERTEX], "Vertex");
fp = fopen(file, "r");
if (fp == NULL) {
return;
}
int num = 0;
for (num = 0; num < line_last; num++) {
LayerNames[num][0] = 0;
}
clear_dxfoptions();
char last_0[256];
strcpy(last_0, "");
int lwpl_flag = 0;
int pl_flag = 0;
int pl_closed = 0;
double pl_first_x = 0.0;
double pl_first_y = 0.0;
double pl_last_x = 0.0;
double pl_last_y = 0.0;
while ((read = getline(&line, &len, fp)) != -1) {
trimline(line2, 1024, line);
int dxfoption = atoi(line2);
if ((read = getline(&line, &len, fp)) != -1) {
trimline(line2, 1024, line);
if (dxfoption == 0) {
if (last_0[0] != 0) {
if (strcmp(last_0, "BLOCK") == 0) {
block = 1;
block_x = atof(dxf_options[OPTION_POINT_X]);
block_y = atof(dxf_options[OPTION_POINT_Y]);
strcpy(block_name, dxf_options[OPTION_BLOCKNAME]);
} else if (strcmp(last_0, "ENDBLK") == 0) {
block = 0;
block_name[0] = 0;
} else if (strcmp(last_0, "INSERT") == 0) {
block = 0;
block_name[0] = 0;
block_x = atof(dxf_options[OPTION_POINT_X]);
block_y = atof(dxf_options[OPTION_POINT_Y]);
float scale_x = atof(dxf_options[41]);
float scale_y = atof(dxf_options[42]);
if (scale_x == 0.0) {
scale_x = 1.0;
}
if (scale_y == 0.0) {
scale_y = 1.0;
}
strcpy(block_name, dxf_options[2]);
int num = 0;
int last = line_last;
for (num = 0; num < last - 1; num++) {
if (myLINES[num].blockdata == 1 && myLINES[num].block[0] != 0 && strcmp(myLINES[num].block, block_name) == 0) {
add_line(myLINES[num].type, dxf_options[OPTION_LAYERNAME], myLINES[num].x1 * scale_x + block_x, myLINES[num].y1 * scale_y + block_y, myLINES[num].x2 * scale_x + block_x, myLINES[num].y2 * scale_y + block_y, myLINES[num].opt, myLINES[num].cx * scale_x + block_x, myLINES[num].cy * scale_y + block_y);
}
}
} else if (strcmp(last_0, "LINE") == 0) {
double p_x1 = atof(dxf_options[OPTION_LINE_X1]);
double p_y1 = atof(dxf_options[OPTION_LINE_Y1]);
double p_x2 = atof(dxf_options[OPTION_LINE_X2]);
double p_y2 = atof(dxf_options[OPTION_LINE_Y2]);
add_line(TYPE_LINE, dxf_options[8], p_x1, p_y1, p_x2, p_y2, 0.0, 0.0, 0.0);
} else if (strcmp(last_0, "VERTEX") == 0) {
double p_x1 = atof(dxf_options[OPTION_LINE_X1]);
double p_y1 = atof(dxf_options[OPTION_LINE_Y1]);
double p_r1 = atof(dxf_options[42]);
if (pl_flag == 0) {
pl_first_x = p_x1;
pl_first_y = p_y1;
} else {
if (p_r1 != 0.0) {
double chord = sqrt(pow(abs(pl_last_x - p_x1), 2.0) + pow(abs(pl_last_y - p_y1), 2.0));
double s = chord / 2.0 * p_r1;
double radius = (pow(chord / 2.0, 2.0) + pow(s, 2.0)) / (2.0 * s);
double len = get_len(pl_last_x, pl_last_y, p_x1, p_y1);
if (radius * 2 < len) {
radius *= 2.0;
}
add_line(TYPE_ARC, dxf_options[8], pl_last_x, pl_last_y, p_x1, p_y1, radius, 0.0, 0.0);
} else {
add_line(TYPE_LINE, dxf_options[8], pl_last_x, pl_last_y, p_x1, p_y1, 0.0, 0.0, 0.0);
}
}
pl_last_x = p_x1;
pl_last_y = p_y1;
pl_flag = 1;
} else if (strcmp(last_0, "SEQEND") == 0) {
if (pl_closed == 1) {
add_line(TYPE_LINE, dxf_options[8], pl_last_x, pl_last_y, pl_first_x, pl_first_y, 0.0, 0.0, 0.0);
}
pl_flag = 0;
pl_closed = 0;
} else if (strcmp(last_0, "POLYLINE") == 0) {
pl_closed = atoi(dxf_options[70]);
pl_flag = 0;
} else if (strcmp(last_0, "LWPOLYLINE") == 0) {
pl_closed = atoi(dxf_options[70]);
double p_x1 = atof(dxf_options[OPTION_LINE_X1]);
double p_y1 = atof(dxf_options[OPTION_LINE_Y1]);
double p_r1 = atof(dxf_options[42]);
pl_last_x = p_x1;
pl_last_y = p_y1;
dxf_options[42][0] = 0;
if (pl_closed == 1) {
add_line(TYPE_LINE, dxf_options[8], pl_last_x, pl_last_y, pl_first_x, pl_first_y, p_r1, 0.0, 0.0);
}
lwpl_flag = 0;
pl_closed = 0;
} else if (strcmp(last_0, "POINT") == 0) {
double p_x1 = atof(dxf_options[OPTION_POINT_X]);
double p_y1 = atof(dxf_options[OPTION_POINT_Y]);
double p_x2 = atof(dxf_options[OPTION_POINT_X]);
double p_y2 = atof(dxf_options[OPTION_POINT_Y]);
add_line(TYPE_POINT, dxf_options[8], p_x1, p_y1, p_x2, p_y2, 0.0, 0.0, 0.0);
} else if (strcmp(last_0, "SPLINE") == 0) {
/* } else if (strcmp(last_0, "CIRCLE") == 0) {
double cx = atof(dxf_options[OPTION_ARC_X]);
double cy = atof(dxf_options[OPTION_ARC_Y]);
double r = atof(dxf_options[OPTION_ARC_RADIUS]);
add_line(TYPE_CIRCLE, dxf_options[8], cx - r, cy, cx + r, cy, r, cx, cy);
add_line(TYPE_CIRCLE, dxf_options[8], cx + r, cy, cx - r, cy, r, cx, cy);
*/
} else if (strcmp(last_0, "ARC") == 0 || strcmp(last_0, "CIRCLE") == 0) {
double p_x1 = atof(dxf_options[OPTION_ARC_X]);
double p_y1 = atof(dxf_options[OPTION_ARC_Y]);
double p_y2 = atof(dxf_options[OPTION_ARC_RADIUS]);
double p_a1 = atof(dxf_options[OPTION_ARC_BEGIN]);
double p_a2 = atof(dxf_options[OPTION_ARC_END]);
if (strcmp(last_0, "CIRCLE") == 0) {
p_a1 = 0.0;
p_a2 = 360.0;
}
if (p_a1 > p_a2) {
p_a2 += 360.0;
}
double r = p_y2;
double angle2 = toRad(p_a1);
double x2 = r * cos(angle2);
double y2 = r * sin(angle2);
double last_x = (p_x1 + x2);
double last_y = (p_y1 + y2);
double an = 0;
double p_rast = (p_a2 - p_a1) / 18.0; // resolução
for (an = p_a1 + p_rast; an <= p_a2 - (p_rast / 2.0); an += p_rast) {
double angle1 = toRad(an);
double x1 = r * cos(angle1);
double y1 = r * sin(angle1);
if (strcmp(last_0, "CIRCLE") == 0) {
add_line(TYPE_CIRCLE, dxf_options[8], last_x, last_y, p_x1 + x1, p_y1 + y1, r, p_x1, p_y1);
} else {
add_line(TYPE_ARC, dxf_options[8], last_x, last_y, p_x1 + x1, p_y1 + y1, r, p_x1, p_y1);
}
last_x = p_x1 + x1;
last_y = p_y1 + y1;
}
double angle3 = toRad(p_a2);
double x3 = r * cos(angle3);
double y3 = r * sin(angle3);
if (strcmp(last_0, "CIRCLE") == 0) {
add_line(TYPE_CIRCLE, dxf_options[8], last_x, last_y, p_x1 + x3, p_y1 + y3, r, p_x1, p_y1);
} else {
add_line(TYPE_ARC, dxf_options[8], last_x, last_y, p_x1 + x3, p_y1 + y3, r, p_x1, p_y1);
}
} else if (strcmp(last_0, "ELLIPSE") == 0) {
double p_x1 = atof(dxf_options[10]);
double p_y1 = atof(dxf_options[20]);
double e_x = atof(dxf_options[11]);
double e_y = atof(dxf_options[21]);
double p_a1 = 0.0;
double p_a2 = 360.0;
double ratio = atof(dxf_options[40]);
double r = e_x;
if (e_x < 0) {
e_x *= -1;
}
if (e_y < 0) {
e_y *= -1;
}
if (e_y > e_x) {
r = e_y * ratio;
ratio = 1.0 / ratio;
}
if (p_a1 > p_a2) {
p_a2 += 360.0;
}
double angle2 = toRad(p_a1);
double x2 = r * cos(angle2);
double y2 = r * ratio * sin(angle2);
double last_x = (p_x1 + x2);
double last_y = (p_y1 + y2);
double first_x = last_x;
double first_y = last_y;
double an = 0;
double p_rast = (p_a2 - p_a1) / 18.0;
for (an = p_a1 + p_rast; an <= p_a2 - (p_rast / 2.0); an += p_rast) {
double angle1 = toRad(an);
double x1 = r * cos(angle1);
double y1 = r * ratio * sin(angle1);
add_line(TYPE_ELLIPSE, dxf_options[8], last_x, last_y, p_x1 + x1, p_y1 + y1, 0.0, 0.0, 0.0);
last_x = p_x1 + x1;
last_y = p_y1 + y1;
}
add_line(TYPE_ELLIPSE, dxf_options[8], last_x, last_y, first_x, first_y, 0.0, 0.0, 0.0);
} else if (strcmp(last_0, "MTEXT") == 0) {
double p_x1 = atof(dxf_options[OPTION_MTEXT_X]);
double p_y1 = atof(dxf_options[OPTION_MTEXT_Y]);
double p_s = atof(dxf_options[OPTION_MTEXT_SIZE]);
output_text_dxf(dxf_options[OPTION_MTEXT_TEXT], dxf_options[8], p_x1, p_y1, 0.0, p_s);
mtext_n++;
} else {
pl_flag = 0;
lwpl_flag = 0;
}
clear_dxfoptions();
}
strcpy(last_0, line2);
}
// printf("## %i: %s\n", dxfoption, line2);
if (dxfoption < 256) {
strcpy(dxf_options[dxfoption], line2);
if (strcmp(last_0, "LWPOLYLINE") == 0) {
if (dxfoption == 10) {
} else if (dxfoption == 20) {
double p_x1 = atof(dxf_options[OPTION_LINE_X1]);
double p_y1 = atof(dxf_options[OPTION_LINE_Y1]);
double p_r1 = atof(dxf_options[42]);
if (lwpl_flag > 0) {
if (dxf_options[42][0] == 0) {
add_line(TYPE_LINE, dxf_options[8], pl_last_x, pl_last_y, p_x1, p_y1, 0.0, 0.0, 0.0);
} else {
double chord = sqrt(pow(abs(pl_last_x - p_x1), 2.0) + pow(abs(pl_last_y - p_y1), 2.0));
double s = chord / 2.0 * p_r1;
double radius = (pow(chord / 2.0, 2.0) + pow(s, 2.0)) / (2.0 * s);
double len = get_len(pl_last_x, pl_last_y, p_x1, p_y1);
if (radius * 2 < len) {
radius *= 2.0;
}
add_line(TYPE_ARC, dxf_options[8], pl_last_x, pl_last_y, p_x1, p_y1, radius, 0.0, 0.0);
}
} else {
pl_first_x = p_x1;
pl_first_y = p_y1;
}
dxf_options[42][0] = 0;
pl_last_x = p_x1;
pl_last_y = p_y1;
lwpl_flag++;
}
}
}
}
}
//exit(0);
fclose(fp);
}