#include <stdlib.h>
#include <math.h>
-#include <assert.h>
+#include <string.h>
#include "../gfxdevice.h"
+#include "../mem.h"
#include "poly.h"
+#include "convert.h"
-static edge_t*edge_new(int x1, int y1, int x2, int y2)
-{
- edge_t*s = malloc(sizeof(edge_t));
- s->a.x = x1;
- s->a.y = y1;
- s->b.x = x2;
- s->b.y = y2;
- s->next = 0;
- return s;
-}
+/* factor that determines into how many line fragments a spline is converted */
+#define SUBFRACTION (2.4)
-static inline void gfxpoly_add_edge(edge_t**list, 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 = *list;
- *list = s;
- }
+ /* we clamp to 31 bit instead of 32 bit because we use
+ a (x1-x2) shortcut when comparing coordinates
+ */
+ x *= z;
+ if(x < -0x40000000) x = -0x40000000;
+ if(x > 0x3fffffff) x = 0x3fffffff;
+ return ceil(x);
}
-gfxpoly_t* gfxpoly_fillToPoly(gfxline_t*line, double gridsize)
+static void convert_gfxline(gfxline_t*line, polywriter_t*w, double gridsize)
{
- edge_t*s = 0;
-
- /* 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(&s, 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(&s, 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(&s, 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;
}
+}
+
+static char* readline(FILE*fi)
+{
+ char c;
+ while(1) {
+ int l = fread(&c, 1, 1, fi);
+ if(!l)
+ return 0;
+ if(c!=10 || c!=13)
+ break;
+ }
+ char line[256];
+ int pos = 0;
+ while(1) {
+ line[pos++] = c;
+ line[pos] = 0;
+ int l = fread(&c, 1, 1, fi);
+ if(!l || c==10 || c==13) {
+ return strdup(line);
+ }
+ }
+}
+
+static void convert_file(const char*filename, polywriter_t*w, double gridsize)
+{
+ FILE*fi = fopen(filename, "rb");
+ if(!fi) {
+ perror(filename);
+ }
+ double z = 1.0 / gridsize;
+ int count = 0;
+ double g = 0;
+ double lastx=0,lasty=0;
+ while(1) {
+ char*line = readline(fi);
+ if(!line)
+ break;
+ double x,y;
+ char s[256];
+ if(sscanf(line, "%lf %lf %s", &x, &y, &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")) {
+ w->lineto(w, convert_coord(x,z), convert_coord(y,z));
+ count++;
+ } else {
+ fprintf(stderr, "invalid command: %s\n", s);
+ }
+ } else if(sscanf(line, "%% gridsize %lf", &g) == 1) {
+ gridsize = g;
+ z = 1.0 / gridsize;
+ w->setgridsize(w, g);
+ }
+ free(line);
+ }
+ fclose(fi);
+ 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;
+ int strokes_size;
+ 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;
+ 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;
+ 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
+ data->poly->num_strokes++;
+}
+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;
+ }
- gfxline_free(line);
+ 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);
+ 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);
+ 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->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);
+}
- gfxpoly_t*p = gfxpoly_new(gridsize);
- p->edges = s;
- return p;
+gfxpoly_t* gfxpoly_from_gfxline(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;
+ for(t=0;t<poly->num_strokes;t++) {
+ free(poly->strokes[t].points);
+ poly->strokes[t].points = 0;
+ }
+ free(poly->strokes);
+ free(poly);
}
git.asbjorn.biz / swftools.git / blobdiff