#include "../gfxdevice.h"
#include "../mem.h"
#include "poly.h"
+#include "convert.h"
+#include "wind.h"
-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;
-}
+/* factor that determines into how many line fragments a spline is converted */
+#define SUBFRACTION (2.4)
-static inline void gfxpoly_add_edge(gfxpoly_t*poly, double _x1, double _y1, double _x2, double _y2)
+static inline int32_t convert_coord(double x, double z)
{
- int x1 = ceil(_x1);
- int y1 = ceil(_y1);
- int x2 = ceil(_x2);
- int y2 = ceil(_y2);
- if(x1!=x2 || y1!=y2) {
- edge_t*s = edge_new(x1, y1, x2, y2);
- s->next = poly->edges;
- poly->edges = s;
- }
+ /* 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 < -0x2000000) x = -0x2000000;
+ if(x > 0x1ffffff) x = 0x1ffffff;
+ return ceil(x);
}
-gfxpoly_t* gfxpoly_from_gfxline(gfxline_t*line, double gridsize)
+static void convert_gfxline(gfxline_t*line, polywriter_t*w, double gridsize)
{
- gfxpoly_t*p = gfxpoly_new(gridsize);
-
- /* factor that determines into how many line fragments a spline is converted */
- double subfraction = 2.4;//0.3
-
- double z = 1.0 / gridsize;
-
- double lastx=0, lasty=0;
assert(!line || line[0].type == gfx_moveTo);
+ double lastx=0,lasty=0;
+ double z = 1.0 / gridsize;
while(line) {
- double x = line->x*z;
- double y = line->y*z;
if(line->type == gfx_moveTo) {
+ if(line->next && line->next->type != gfx_moveTo && (line->x!=lastx || line->y!=lasty)) {
+ w->moveto(w, convert_coord(line->x,z), convert_coord(line->y,z));
+ }
} else if(line->type == gfx_lineTo) {
- gfxpoly_add_edge(p, lastx, lasty, x, y);
+ w->lineto(w, convert_coord(line->x,z), convert_coord(line->y,z));
} else if(line->type == gfx_splineTo) {
int parts = (int)(sqrt(fabs(line->x-2*line->sx+lastx) +
- fabs(line->y-2*line->sy+lasty))*subfraction);
+ fabs(line->y-2*line->sy+lasty))*SUBFRACTION);
if(!parts) parts = 1;
double stepsize = 1.0/parts;
int i;
for(i=0;i<parts;i++) {
double t = (double)i*stepsize;
- double sx = (line->x*t*t + 2*line->sx*t*(1-t) + x*(1-t)*(1-t))*z;
- double sy = (line->y*t*t + 2*line->sy*t*(1-t) + y*(1-t)*(1-t))*z;
- gfxpoly_add_edge(p, lastx, lasty, sx, sy);
- lastx = sx;
- lasty = sy;
+ double sx = (line->x*t*t + 2*line->sx*t*(1-t) + lastx*(1-t)*(1-t));
+ double sy = (line->y*t*t + 2*line->sy*t*(1-t) + lasty*(1-t)*(1-t));
+ w->lineto(w, convert_coord(sx,z), convert_coord(sy,z));
}
- gfxpoly_add_edge(p, lastx, lasty, x, y);
+ w->lineto(w, convert_coord(line->x,z), convert_coord(line->y,z));
}
- lastx = x;
- lasty = y;
+ lastx = line->x;
+ lasty = line->y;
line = line->next;
}
-
- gfxline_free(line);
- return p;
}
static char* readline(FILE*fi)
}
}
-gfxpoly_t* gfxpoly_from_file(const char*filename, double gridsize)
+static void convert_file(const char*filename, polywriter_t*w, double gridsize)
{
- gfxpoly_t*p = gfxpoly_new(gridsize);
-
- double z = 1.0 / gridsize;
-
FILE*fi = fopen(filename, "rb");
if(!fi) {
perror(filename);
- return 0;
}
+ double z = 1.0 / gridsize;
int count = 0;
+ double g = 0;
double lastx=0,lasty=0;
while(1) {
char*line = readline(fi);
break;
double x,y;
char s[256];
- if(sscanf(line, "%lf %lf %s", &x, &y, &s) == 3) {
- x*=z;
- y*=z;
+ 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++;
} else if(s && !strcmp(s,"lineto")) {
- gfxpoly_add_edge(p, lastx, lasty, x, y);
+ w->lineto(w, convert_coord(x,z), convert_coord(y,z));
count++;
} else {
- printf("invalid command: %s\n", s);
+ fprintf(stderr, "invalid command: %s\n", s);
}
- lastx = x;
- lasty = y;
+ } else if(sscanf(line, "%% gridsize %lf", &g) == 1) {
+ gridsize = g;
+ z = 1.0 / gridsize;
+ w->setgridsize(w, g);
}
free(line);
}
fclose(fi);
- printf("loaded %d points from %s\n", count, filename);
- return p;
+ if(g) {
+ fprintf(stderr, "loaded %d points from %s (gridsize %f)\n", count, filename, g);
+ } else {
+ fprintf(stderr, "loaded %d points from %s\n", count, filename);
+ }
+}
+
+typedef struct _compactpoly {
+ gfxpoly_t*poly;
+ point_t last;
+ point_t*points;
+ int num_points;
+ int points_size;
+ segment_dir_t dir;
+ char new;
+} compactpoly_t;
+
+void finish_segment(compactpoly_t*data)
+{
+ if(data->num_points <= 1)
+ return;
+ point_t*p = malloc(sizeof(point_t)*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);
+ if(data->dir == DIR_UP) {
+ int t;
+ int s = data->num_points;
+ for(t=0;t<data->num_points;t++) {
+ p[--s] = data->points[t];
+ }
+ } else {
+ memcpy(p, data->points, sizeof(point_t)*data->num_points);
+ }
+#ifdef CHECKS
+ int t;
+ for(t=0;t<data->num_points-1;t++) {
+ assert(p[t].y<=p[t+1].y);
+ }
+#endif
+}
+static void compactmoveto(polywriter_t*w, int32_t x, int32_t y)
+{
+ compactpoly_t*data = (compactpoly_t*)w->internal;
+ point_t p;
+ p.x = x;
+ p.y = y;
+ if(p.x != data->last.x || p.y != data->last.y) {
+ data->new = 1;
+ }
+ data->last = p;
+}
+static void compactlineto(polywriter_t*w, int32_t x, int32_t y)
+{
+ compactpoly_t*data = (compactpoly_t*)w->internal;
+ point_t p;
+ p.x = x;
+ p.y = y;
+ 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) {
+ 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;
+ assert(data->points_size > data->num_points);
+ data->points = rfx_realloc(data->points, sizeof(point_t)*data->points_size);
+ }
+ data->points[data->num_points++] = p;
+ data->last = p;
+}
+static void compactsetgridsize(polywriter_t*w, double gridsize)
+{
+ compactpoly_t*d = (compactpoly_t*)w->internal;
+ d->poly->gridsize = gridsize;
+}
+/*static int compare_stroke(const void*_s1, const void*_s2)
+{
+ gfxpolystroke_t*s1 = (gfxpolystroke_t*)_s1;
+ gfxpolystroke_t*s2 = (gfxpolystroke_t*)_s2;
+ return s1->points[0].y - s2->points[0].y;
+}*/
+static void*compactfinish(polywriter_t*w)
+{
+ compactpoly_t*data = (compactpoly_t*)w->internal;
+ finish_segment(data);
+ //qsort(data->poly->strokes, data->poly->num_strokes, sizeof(gfxpolystroke_t), compare_stroke);
+ free(data->points);
+ gfxpoly_t*poly = data->poly;
+ free(w->internal);w->internal = 0;
+ return (void*)poly;
+}
+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(gfxpoly_t));
+ data->poly->gridsize = 1.0;
+ data->last.x = data->last.y = 0;
+ 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 = 0;
+}
+
+gfxpoly_t* gfxpoly_from_fill(gfxline_t*line, double gridsize)
+{
+ polywriter_t writer;
+ gfxpolywriter_init(&writer);
+ writer.setgridsize(&writer, gridsize);
+ convert_gfxline(line, &writer, gridsize);
+ return (gfxpoly_t*)writer.finish(&writer);
+}
+gfxpoly_t* gfxpoly_from_file(const char*filename, double gridsize)
+{
+ polywriter_t writer;
+ gfxpolywriter_init(&writer);
+ writer.setgridsize(&writer, gridsize);
+ convert_file(filename, &writer, gridsize);
+ 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;
}
+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;
+ 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) {
+ 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