#include "../mem.h"
#include "poly.h"
#include "convert.h"
+#include "wind.h"
/* factor that determines into how many line fragments a spline is converted */
#define SUBFRACTION (2.4)
-static edge_t*edge_new(int x1, int y1, int x2, int y2)
-{
- edge_t*s = rfx_calloc(sizeof(edge_t));
- s->a.x = x1;
- s->a.y = y1;
- s->b.x = x2;
- s->b.y = y2;
- return s;
-}
-
static inline int32_t convert_coord(double x, double z)
{
- /* we clamp to 31 bit instead of 32 bit because we use
- a (x1-x2) shortcut when comparing coordinates
+ /* we clamp to 26 bit because:
+ a) we use a (x1-x2) shortcut when comparing coordinates
+ b) we need to be able to multiply two coordinates and store them in a double w/o loss of precision
*/
x *= z;
- if(x < -0x40000000) x = -0x40000000;
- if(x > 0x3fffffff) x = 0x3fffffff;
+ if(x < -0x2000000) x = -0x2000000;
+ if(x > 0x1ffffff) x = 0x1ffffff;
return ceil(x);
}
break;
double x,y;
char s[256];
- if(sscanf(line, "%lf %lf %s", &x, &y, &s) == 3) {
+ if(sscanf(line, "%lf %lf %s", &x, &y, (char*)&s) == 3) {
if(s && !strcmp(s,"moveto")) {
w->moveto(w, convert_coord(x,z), convert_coord(y,z));
count++;
}
}
-typedef struct _stdpoly {
- gfxpoly_t*poly;
- double lastx,lasty;
-} stdpoly_t;
-
-static void stdmoveto(polywriter_t*w, int x, int y)
-{
- stdpoly_t*d = (stdpoly_t*)w->internal;
- d->lastx = x;d->lasty = y;
-}
-static void stdlineto(polywriter_t*w, int x, int y)
-{
- stdpoly_t*d = (stdpoly_t*)w->internal;
- int x1 = d->lastx;
- int y1 = d->lasty;
- int x2 = x;
- int y2 = y;
- if(x1!=x2 || y1!=y2) {
- edge_t*s = edge_new(x1, y1, x2, y2);
- s->next = d->poly->edges;
- d->poly->edges = s;
- }
- d->lastx = x;d->lasty = y;
-}
-static void stdsetgridsize(polywriter_t*w, double gridsize)
-{
- stdpoly_t*d = (stdpoly_t*)w->internal;
- d->poly->gridsize = gridsize;
-}
-static void* stdfinish(polywriter_t*w)
-{
- stdpoly_t*d = (stdpoly_t*)w->internal;
- gfxpoly_t*poly = d->poly;
- free(w->internal);w->internal = 0;
- return poly;
-}
-void gfxpolywriter_init(polywriter_t*w)
-{
- w->moveto = stdmoveto;
- w->lineto = stdlineto;
- w->setgridsize = stdsetgridsize;
- w->finish = stdfinish;
- stdpoly_t*data = w->internal = malloc(sizeof(stdpoly_t));
- data->poly = gfxpoly_new(1.0);
- data->lastx = 0;
- data->lasty = 0;
-}
-
typedef struct _compactpoly {
- gfxcompactpoly_t*poly;
+ gfxpoly_t*poly;
point_t last;
- int strokes_size;
point_t*points;
int num_points;
int points_size;
{
if(data->num_points <= 1)
return;
- if(data->poly->num_strokes == data->strokes_size) {
- data->strokes_size <<= 1;
- assert(data->strokes_size > data->poly->num_strokes);
- data->poly->strokes = rfx_realloc(data->poly->strokes, sizeof(gfxpolystroke_t)*data->strokes_size);
- }
point_t*p = malloc(sizeof(point_t)*data->num_points);
- gfxpolystroke_t*s = &data->poly->strokes[data->poly->num_strokes];
- s->num_points = data->num_points;
+ gfxpolystroke_t*s = rfx_calloc(sizeof(gfxpolystroke_t));
+ s->next = data->poly->strokes;
+ data->poly->strokes = s;
+ s->num_points = s->points_size = data->num_points;
s->dir = data->dir;
s->points = p;
assert(data->dir != DIR_UNKNOWN);
assert(p[t].y<=p[t+1].y);
}
#endif
- data->poly->num_strokes++;
}
-static void compactmoveto(polywriter_t*w, int x, int y)
+static void compactmoveto(polywriter_t*w, int32_t x, int32_t y)
{
compactpoly_t*data = (compactpoly_t*)w->internal;
point_t p;
}
data->last = p;
}
-static void compactlineto(polywriter_t*w, int x, int y)
+static void compactlineto(polywriter_t*w, int32_t x, int32_t y)
{
compactpoly_t*data = (compactpoly_t*)w->internal;
point_t p;
if(p.x == data->last.x && p.y == data->last.y)
return;
- if(p.y < data->last.y && data->dir != DIR_UP ||
- p.y > data->last.y && data->dir != DIR_DOWN ||
- data->new) {
+ if((p.y < data->last.y && data->dir != DIR_UP) ||
+ (p.y > data->last.y && data->dir != DIR_DOWN) || data->new) {
finish_segment(data);
data->dir = p.y > data->last.y ? DIR_DOWN : DIR_UP;
data->points[0] = data->last;
data->num_points = 1;
}
+ data->new = 0;
if(data->points_size == data->num_points) {
data->points_size <<= 1;
{
compactpoly_t*data = (compactpoly_t*)w->internal;
finish_segment(data);
- data->poly->strokes = (gfxpolystroke_t*)rfx_realloc(data->poly->strokes, sizeof(gfxpolystroke_t)*data->poly->num_strokes);
//qsort(data->poly->strokes, data->poly->num_strokes, sizeof(gfxpolystroke_t), compare_stroke);
free(data->points);
- gfxcompactpoly_t*poly = data->poly;
+ gfxpoly_t*poly = data->poly;
free(w->internal);w->internal = 0;
return (void*)poly;
}
-void gfxcompactpolywriter_init(polywriter_t*w)
+void gfxpolywriter_init(polywriter_t*w)
{
w->moveto = compactmoveto;
w->lineto = compactlineto;
w->setgridsize = compactsetgridsize;
w->finish = compactfinish;
compactpoly_t*data = w->internal = rfx_calloc(sizeof(compactpoly_t));
- data->poly = rfx_calloc(sizeof(gfxcompactpoly_t));
+ data->poly = rfx_calloc(sizeof(gfxpoly_t));
data->poly->gridsize = 1.0;
data->last.x = data->last.y = 0;
- data->strokes_size = 16;
data->num_points = 0;
data->points_size = 16;
data->new = 1;
data->dir = DIR_UNKNOWN;
data->points = (point_t*)rfx_alloc(sizeof(point_t)*data->points_size);
- data->poly->strokes = (gfxpolystroke_t*)rfx_alloc(sizeof(gfxpolystroke_t)*data->strokes_size);
+ data->poly->strokes = 0;
}
-gfxpoly_t* gfxpoly_from_gfxline(gfxline_t*line, double gridsize)
-{
- polywriter_t w;
- gfxpolywriter_init(&w);
- w.setgridsize(&w, gridsize);
- convert_gfxline(line, &w, gridsize);
- return w.finish(&w);
-}
-gfxpoly_t* gfxpoly_from_file(const char*filename, double gridsize)
-{
- polywriter_t w;
- gfxpolywriter_init(&w);
- w.setgridsize(&w, gridsize);
- convert_file(filename, &w, gridsize);
- return w.finish(&w);
-}
-gfxcompactpoly_t* gfxcompactpoly_from_gfxline(gfxline_t*line, double gridsize)
+gfxpoly_t* gfxpoly_from_fill(gfxline_t*line, double gridsize)
{
polywriter_t writer;
- gfxcompactpolywriter_init(&writer);
+ gfxpolywriter_init(&writer);
writer.setgridsize(&writer, gridsize);
convert_gfxline(line, &writer, gridsize);
- return (gfxcompactpoly_t*)writer.finish(&writer);
+ return (gfxpoly_t*)writer.finish(&writer);
}
-gfxcompactpoly_t* gfxcompactpoly_from_file(const char*filename, double gridsize)
+gfxpoly_t* gfxpoly_from_file(const char*filename, double gridsize)
{
polywriter_t writer;
- gfxcompactpolywriter_init(&writer);
+ gfxpolywriter_init(&writer);
writer.setgridsize(&writer, gridsize);
convert_file(filename, &writer, gridsize);
- return (gfxcompactpoly_t*)writer.finish(&writer);
+ return (gfxpoly_t*)writer.finish(&writer);
+}
+void gfxpoly_destroy(gfxpoly_t*poly)
+{
+ int t;
+ gfxpolystroke_t*stroke = poly->strokes;
+ while(stroke) {
+ gfxpolystroke_t*next = stroke->next;
+ free(stroke->points);
+ free(stroke);
+ stroke = next;
+ }
+ free(poly);
+}
+
+typedef struct _polydraw_internal
+{
+ double lx, ly;
+ int32_t lastx, lasty;
+ int32_t x0, y0;
+ double z;
+ char last;
+ polywriter_t writer;
+} polydraw_internal_t;
+
+static void polydraw_moveTo(gfxdrawer_t*d, gfxcoord_t _x, gfxcoord_t _y)
+{
+ polydraw_internal_t*i = (polydraw_internal_t*)d->internal;
+ int32_t x = convert_coord(_x, i->z);
+ int32_t y = convert_coord(_y, i->z);
+ if(i->lastx != x || i->lasty != y) {
+ i->writer.moveto(&i->writer, x, y);
+ }
+ i->lx = _x;
+ i->ly = _y;
+ i->x0 = x;
+ i->y0 = y;
+ i->lastx = x;
+ i->lasty = y;
+ i->last = 1;
+}
+static void polydraw_lineTo(gfxdrawer_t*d, gfxcoord_t _x, gfxcoord_t _y)
+{
+ polydraw_internal_t*i = (polydraw_internal_t*)d->internal;
+ if(!i->last) {
+ polydraw_moveTo(d, _x, _y);
+ return;
+ }
+ int32_t x = convert_coord(_x, i->z);
+ int32_t y = convert_coord(_y, i->z);
+ if(i->lastx != x || i->lasty != y) {
+ i->writer.lineto(&i->writer, x, y);
+ }
+ i->lx = _x;
+ i->ly = _y;
+ i->lastx = x;
+ i->lasty = y;
+ i->last = 1;
+}
+static void polydraw_splineTo(gfxdrawer_t*d, gfxcoord_t sx, gfxcoord_t sy, gfxcoord_t x, gfxcoord_t y)
+{
+ polydraw_internal_t*i = (polydraw_internal_t*)d->internal;
+ if(!i->last) {
+ polydraw_moveTo(d, x, y);
+ return;
+ }
+ double c = fabs(x-2*sx+i->lx) + fabs(y-2*sy+i->ly);
+ int parts = (int)(sqrt(c)*SUBFRACTION);
+ if(!parts) parts = 1;
+ int t;
+ int32_t nx,ny;
+ for(t=0;t<parts;t++) {
+ nx = convert_coord((double)(t*t*x + 2*t*(parts-t)*sx + (parts-t)*(parts-t)*i->lx)/(double)(parts*parts), i->z);
+ ny = convert_coord((double)(t*t*y + 2*t*(parts-t)*sy + (parts-t)*(parts-t)*i->ly)/(double)(parts*parts), i->z);
+ if(nx != i->lastx || ny != i->lasty) {
+ i->writer.lineto(&i->writer, nx, ny);
+ i->lastx = nx; i->lasty = ny;
+ }
+ }
+ nx = convert_coord(x,i->z);
+ ny = convert_coord(y,i->z);
+ if(nx != i->lastx || ny != i->lasty) {
+ i->writer.lineto(&i->writer, nx, ny);
+ }
+ i->lx = x;
+ i->ly = y;
+ i->lastx = nx;
+ i->lasty = ny;
+ i->last = 1;
}
-gfxpoly_t*gfxpoly_from_gfxcompactpoly(gfxcompactpoly_t*poly)
+static void polydraw_close(gfxdrawer_t*d)
{
- int s,t;
- int pass;
- gfxpoly_t*poly2 = gfxpoly_new(poly->gridsize);
- for(t=0;t<poly->num_strokes;t++) {
- gfxpolystroke_t*stroke = &poly->strokes[t];
- for(s=0;s<stroke->num_points-1;s++) {
- point_t a = stroke->points[s];
- point_t b = stroke->points[s+1];
- edge_t*e = 0;
+ polydraw_internal_t*i = (polydraw_internal_t*)d->internal;
+ assert(!(i->last && (i->x0 == INVALID_COORD || i->y0 == INVALID_COORD)));
+ if(!i->last)
+ return;
+ if(i->lastx != i->x0 || i->lasty != i->y0) {
+ i->writer.lineto(&i->writer, i->x0, i->y0);
+ i->lastx = i->x0;
+ i->lasty = i->y0;
+ }
+ i->last = 0;
+ i->x0 = INVALID_COORD;
+ i->y0 = INVALID_COORD;
+}
+static void* polydraw_result(gfxdrawer_t*d)
+{
+ polydraw_internal_t*i = (polydraw_internal_t*)d->internal;
+ void*result = i->writer.finish(&i->writer);
+ rfx_free(i);
+ memset(d, 0, sizeof(gfxdrawer_t));
+ return result;
+}
+
+void gfxdrawer_target_poly(gfxdrawer_t*d, double gridsize)
+{
+ polydraw_internal_t*i = (polydraw_internal_t*)rfx_calloc(sizeof(polydraw_internal_t));
+ d->internal = i;
+ i->lastx = INVALID_COORD; // convert_coord can never return this value
+ i->lasty = INVALID_COORD;
+ i->x0 = INVALID_COORD;
+ i->y0 = INVALID_COORD;
+ d->moveTo = polydraw_moveTo;
+ d->lineTo = polydraw_lineTo;
+ d->splineTo = polydraw_splineTo;
+ d->close = polydraw_close;
+ d->result = polydraw_result;
+ gfxpolywriter_init(&i->writer);
+ i->writer.setgridsize(&i->writer, gridsize);
+ i->z = 1.0 / gridsize;
+}
+
+#if 0
+gfxline_t*gfxline_from_gfxpoly(gfxpoly_t*poly)
+{
+ gfxpolystroke_t*stroke;
+ int count = 0;
+ for(stroke=poly->strokes;stroke;stroke=stroke->next) {
+ assert(stroke->num_points);
+ count += stroke->num_points;
+ }
+ if(!count) return 0;
+ gfxline_t*l = malloc(sizeof(gfxline_t)*count);
+ count = 0;
+ /* TODO: it might make sense to concatenate strokes */
+ for(stroke=poly->strokes;stroke;stroke=stroke->next) {
+ int t;
+ for(t=0;t<stroke->num_points;t++) {
+ l[count+t].x = stroke->points[t].x * poly->gridsize;
+ l[count+t].y = stroke->points[t].y * poly->gridsize;
+ l[count+t].type = gfx_lineTo;
+ l[count+t].next = &l[count+t+1];
+ }
+ l[count].type = gfx_moveTo;
+ count+=stroke->num_points;
+ }
+ l[count-1].next = 0;
+ return l;
+}
+#endif
+
+static gfxline_t*mkgfxline(gfxpoly_t*poly, char preserve_direction)
+{
+ gfxpolystroke_t*stroke;
+ int count = 0;
+ if(!poly->strokes)
+ return 0;
+ dict_t*d = dict_new2(&point_type);
+ dict_t*todo = dict_new2(&ptr_type);
+ gfxpolystroke_t*stroke_min= poly->strokes;
+ int32_t x_min=stroke_min->points[0].x;
+ int32_t y_min=stroke_min->points[0].y;
+ for(stroke=poly->strokes;stroke;stroke=stroke->next) {
+ dict_put(todo, stroke, stroke);
+ assert(stroke->num_points>1);
+ count += stroke->num_points;
+ if(stroke->dir == DIR_UP) {
+ dict_put(d, &stroke->points[stroke->num_points-1], stroke);
+ if(!preserve_direction)
+ dict_put(d, &stroke->points[0], stroke);
+ } else {
+ dict_put(d, &stroke->points[0], stroke);
+ if(!preserve_direction)
+ dict_put(d, &stroke->points[stroke->num_points-1], stroke);
+ }
+ if(stroke->points[0].y < y_min ||
+ (stroke->points[0].y == y_min && stroke->points[0].x < x_min)) {
+ y_min = stroke->points[0].y;
+ stroke_min = stroke;
+ }
+ }
+ gfxpolystroke_t*next_todo = poly->strokes;
+ gfxline_t*l = malloc(sizeof(gfxline_t)*count);
+ count = 0;
+ stroke = stroke_min;
+
+ point_t last = {INVALID_COORD, INVALID_COORD};
+ char should_connect = 0;
+ while(stroke) {
+ if(stroke && !preserve_direction) {
+ char del1 = dict_del2(d, &stroke->points[0], stroke);
+ char del2 = dict_del2(d, &stroke->points[stroke->num_points-1], stroke);
+ assert(del1 && del2);
+ }
+ assert(dict_contains(todo, stroke));
+ int t;
+ int pos = 0;
+ int incr = 1;
+ if(preserve_direction) {
if(stroke->dir == DIR_UP) {
- e = edge_new(a.x,a.y,b.x,b.y);
- } else {
- e = edge_new(b.x,b.y,a.x,a.y);
+ pos = stroke->num_points-1;
+ incr = -1;
+ }
+ } else {
+ // try to find matching point on either end.
+ // Prefer downward.
+ if(last.x == stroke->points[stroke->num_points-1].x &&
+ last.y == stroke->points[stroke->num_points-1].y) {
+ pos = stroke->num_points-1;
+ incr = -1;
}
- e->style = stroke->fs;
- e->next = poly2->edges;
- poly2->edges = e;
+ }
+ if(last.x != stroke->points[pos].x || last.y != stroke->points[pos].y) {
+ l[count].x = stroke->points[pos].x * poly->gridsize;
+ l[count].y = stroke->points[pos].y * poly->gridsize;
+ l[count].type = gfx_moveTo;
+ l[count].next = &l[count+1];
+ count++;
+ assert(!should_connect);
+ }
+ pos += incr;
+ for(t=1;t<stroke->num_points;t++) {
+ l[count].x = stroke->points[pos].x * poly->gridsize;
+ l[count].y = stroke->points[pos].y * poly->gridsize;
+ l[count].type = gfx_lineTo;
+ l[count].next = &l[count+1];
+ count++;
+ pos += incr;
+ }
+ last = stroke->points[pos-incr];
+ char del = dict_del(todo, stroke);
+ assert(del);
+ assert(!dict_contains(todo, stroke));
+
+ /* try to find a poly which starts at the point we drew last */
+ stroke = dict_lookup(d, &last);
+ should_connect = 1;
+ while(!dict_contains(todo, stroke)) {
+ should_connect = 0;
+ stroke = next_todo;
+ if(!next_todo) {
+ stroke = 0;
+ break;
+ }
+ next_todo = next_todo->next;
}
}
- return poly2;
+ l[count-1].next = 0;
+ dict_destroy(todo);
+ dict_destroy(d);
+ return l;
}
-void gfxcompactpoly_destroy(gfxcompactpoly_t*poly)
+
+gfxline_t*gfxline_from_gfxpoly(gfxpoly_t*poly)
{
- int t;
- for(t=0;t<poly->num_strokes;t++) {
- free(poly->strokes[t].points);
- poly->strokes[t].points = 0;
- }
- free(poly->strokes);
- free(poly);
+ return mkgfxline(poly, 0);
+}
+
+gfxline_t*gfxline_from_gfxpoly_updown(gfxpoly_t*poly)
+{
+ return mkgfxline(poly, 1);
+}
+
+static windcontext_t onepolygon = {1};
+gfxline_t* gfxpoly_circular_to_evenodd(gfxline_t*line, double gridsize)
+{
+ gfxpoly_t*poly = gfxpoly_from_fill(line, gridsize);
+ gfxpoly_t*poly2 = gfxpoly_process(poly, 0, &windrule_circular, &onepolygon);
+ gfxline_t*line2 = gfxline_from_gfxpoly(poly2);
+ gfxpoly_destroy(poly);
+ gfxpoly_destroy(poly2);
+ return line2;
+}
+
+gfxpoly_t* gfxpoly_createbox(double x1, double y1,double x2, double y2, double gridsize)
+{
+ gfxline_t* line = gfxline_makerectangle(x1, y1, x2, y2);
+ gfxpoly_t* poly = gfxpoly_from_fill(line, gridsize);
+ gfxline_free(line);
+ return poly;
}
git.asbjorn.biz / swftools.git / blobdiff