#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 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++;
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;
{
double lx, ly;
int32_t lastx, lasty;
+ int32_t x0, y0;
double z;
char last;
polywriter_t writer;
}
i->lx = _x;
i->ly = _y;
+ i->x0 = x;
+ i->y0 = y;
i->lastx = x;
i->lasty = y;
i->last = 1;
i->lasty = ny;
i->last = 1;
}
+static void polydraw_close(gfxdrawer_t*d)
+{
+ 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;
{
polydraw_internal_t*i = (polydraw_internal_t*)rfx_calloc(sizeof(polydraw_internal_t));
d->internal = i;
- i->lastx = 0x7fffffff; // convert_coord can never return this value
- i->lasty = 0x7fffffff;
+ 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;
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) {
+ 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;
+ }
+ }
+ 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;
+ }
+ }
+ l[count-1].next = 0;
+ dict_destroy(todo);
+ dict_destroy(d);
+ return l;
+}
+
+gfxline_t*gfxline_from_gfxpoly(gfxpoly_t*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